US2983282A - Apparatus for producing artificial filaments - Google Patents

Apparatus for producing artificial filaments Download PDF

Info

Publication number: US2983282A
Authority: US; United States
Prior art keywords: spinning; pumps; filaments; conduits; segments
Prior art date: 1958-05-12
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired - Lifetime

Application number

US734717A

Inventor

Ernest K Bauer

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Akzo Nobel UK PLC

Original Assignee

American Viscose Corp

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1958-05-12

Filing date

1958-05-12

Publication date

1961-05-09

1958-05-12 Application filed by American Viscose Corp filed Critical American Viscose Corp

1958-05-12 Priority to US734717A priority Critical patent/US2983282A/en

1961-05-09 Application granted granted Critical

1961-05-09 Publication of US2983282A publication Critical patent/US2983282A/en

1978-05-09 Anticipated expiration legal-status Critical

1981-04-15 Assigned to KELLOGG CREDIT CORPORATION A DE CORP. reassignment KELLOGG CREDIT CORPORATION A DE CORP. AGREEMENT WHEREBY SAID HELLER AND RAYONIER RELEASES ALL MORTGAGES AND SECURITY INTERESTS HELD BY AVTEX ON APRIL 28, 1978, AND JAN. 11, 1979, RESPECTIVELY AND ASSIGNS ITS ENTIRE INTEREST IN SAID MORT-AGAGE AGREEMENT TO ASSIGNEE (SEE RECORD FOR DETAILS) Assignors: AVTEX FIBERS INC., A NY CORP., ITT RAYONIER INCORPORATED, A DE CORP., WALTER E. HELLER & COMPANY, INC. A NY CORP.

1981-04-15 Assigned to WALTER E. HELLER & COMPANY, INC., A CORP. OF DEL. reassignment WALTER E. HELLER & COMPANY, INC., A CORP. OF DEL. AGREEMENT WHEREBY AETNA RELEASES AVTEX FROM ALL MORTAGES AND SECURITY INTERESTS IN SAID INVENTIONS AS OF JANUARY 11,1979, AND ASSIGNS TO ASSIGNEE THE ENTIRE INTEREST IN SAID MORTAGE AGREEMENT TO ASSIGNEE (SEE RECORDS FOR DETAILS). Assignors: AETNA BUSINESS CREDIT, INC., A CORP. OF N.Y., AVTEX FIBERS, INC, A CORP. OF NY, KELLOGG CREDIT CORP., A CORP. OF DEL.

1981-04-15 Assigned to BALBOA INSURANCE COMPANY C/O THE PAUL REVERE EQUITY MANAGEMENT COMPANY, NEW ENGLAND MUTUAL LIFE INSURANCE COMPANY, JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY, PAUL REVERE LIFE INSURANCE COMPANY THE C/O THE PAUL REVERE EQUITY MANAGEMENT COMPANY, WESTERN AND SOUTHERN LIFE INSURANCE COMPANY THE C/O NEW ENGLAND MUTUAL LIFE INSURANCE COMPANY, PROVIDENT ALLIANCE LIFE INSURANCE COMPANY C/O THE PAUL REVERE EQUITY MANAGEMENT COMPANY reassignment BALBOA INSURANCE COMPANY C/O THE PAUL REVERE EQUITY MANAGEMENT COMPANY AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED. (SEE DOCUMENT FOR DETAILS). Assignors: AVTEX FIBERS INC. A NY CORP.

Status Expired - Lifetime legal-status Critical Current

Links

238000009987 spinning Methods 0.000 description 42
239000000243 solution Substances 0.000 description 14
238000006073 displacement reaction Methods 0.000 description 8
239000011435 rock Substances 0.000 description 8
239000003086 colorant Substances 0.000 description 7
238000005086 pumping Methods 0.000 description 6
239000000203 mixture Substances 0.000 description 4
229920000297 Rayon Polymers 0.000 description 2
238000001125 extrusion Methods 0.000 description 2
QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
238000000578 dry spinning Methods 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
239000000463 material Substances 0.000 description 1
238000000034 method Methods 0.000 description 1
239000001044 red dye Substances 0.000 description 1
238000002166 wet spinning Methods 0.000 description 1

Images

Classifications

- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/26—Composite fibers made of two or more materials
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/85978—With pump
- Y10T137/86131—Plural
- Y10T137/86163—Parallel
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86389—Programmer or timer
- Y10T137/86405—Repeating cycle

Definitions

the present invention relates to a system or apparatus for producing artificial filaments and more particularly, artificial filaments having alternating segments of differing characteristics such as difierent colors.
the red segments will generally have a greater cross-sectional area than the white segments because of the addition of the red dye to the normal flow of the white spinning solu tion.
Another difiiculty encountered in spinning filaments having alternating segments of differing characteristics has been the inability to provide sharp lines of demarcation between the segments. 7
Figure 1 is a diagrammatic showing of the system of the present invention.
Figure 2 is an elevational view of a device employed for controlling the operation of the two pumps forming a part of the system.
Two differently colored or otherwise differently characterized supplies of spinning solutions or dopes are contained in the tanks 10 and 11 from which they are pumped respectively through conduits 12 and 13 for extrusion through a common spinneret or jet 14 connected by a relatively short length of pipe 15 to the two conduits.
the spinning solutions may be viscose, acetate or any other solutions which may be spun by wet or dry spinning methods to form filaments.
the conduits 12 and 13 may contain filters 16 and 17, respectively, such as ordinarily employed in heretofore known spinning systems.
a positive displacement pump such as a gear pump, is provided in the line at a point close to the tion to the ordinary difierential found in an automobile.
the driving gear of the ditierential is driven by a sprocket chain 25 from a sprocket wheel 26 provided on the output shaft of a speed reduction unit 27, the input of which may be driven from any suitable constant speed motor 28.
the pressureand volume of flow of the spinning solution As previously mentioned, among the conditions afiecting the denier of the filaments formed by extrusion of the spinning solution through the spinneret is the pressureand volume of flow of the spinning solution. Since the present invention contemplates the production of filaments having a constant denier or cross-sectional area throughout their length, means is provided for continuously supplying the spinneret with a constant volume and pressure of spinning solution. Since the two pumps 18,
- positive brake means are provided in the form of teeth 29' and 30 formed on the ends of a common rocker arm 31 pivotally mounted at 32.
the rocker arm 31 may be rocked by means of a solenoid 33, the armature of which is connected to said rocker arm so that when said solenoid is energized the rocker arm is rocked to engage the tooth 29 with the drive gear 20 and upon de-energization said solenoid rocks the rocker arm in the opposite direction to engage the tooth 30 with the drive gear 21.
the gears 20 and 21 are driven at a fairly low speed so that it is entirely practicable to provide a positive brake of this type.
the two pumps are never allowed to' operate at the same time, but when one of them is stopped the difierential gear immediately delivers its full power to the other pump and thus there always be a particular quantity of spinning solution supplied to the spin- Patented May 9, 1961 3 neret, the supply consisting alternately of one or the other of the difierently characterized spinning solutions.
the stopping of the pumps is abrupt as is the case with a positive type brake, the resultant filaments have a sharpline of demarcation" between the difierently characterized segments.
a friction brake will be provided instead of the positive brake so that it is possible to stop the pumps gradually instead of abruptly.
the one pump will be speeded up by the differential gear 24 in direct proportion to the slowing down of the other so that during the period while both pumps are operating, some of each of the spinning dopes will be. supplied to the spinneret to thus produce between the segments of difiering characteristics a zone consisting of a mixture, but nevertheless of the same denier.
the output shaft of the speed reduction unit 27 carries a cam 34 having one-half of its periphery of a different radius from the other half and this cam cooperates with a follower 35 provided on the operating arm of a micro switch 36 connected in a circuit including'the solenoid 33.
the switch 36 may be so arranged as to cause energization of the solenoid either when the follower 35 is on the high or low portion of the periphery of the cam 34 and de-,
two spinning dope supplies of difiering characteristics a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for pumping the spinning dopes under pressure through said conduits, a difierentialdrive for said pumps, a motor for driving said diiferential drive, brakes for said pumps, means for alternately operating said brakes, said difierential drive speeding up one pump in direct proportion to the slowing down of the other whereby spinning dope will be supplied to the outlet at a constant rate.
Apparatus for spinning constant. denier filaments havingalternating segments of difiering characteristics comprising two spinning dope supplies of differing .characteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for supplying pressure to the spinning dopes, said pumps being of the same capacity, a diflerential gear drive for said pumps, and means for alternately interrupting the operationof said pumps, said. differential drive increasing the speed of the operating pump when the other pump is stopped whereby the total supply of spinning dope to the outlet remains constant.
Apparatus for spinning constant denier filaments having alternating segments of differing characteristics comprising two spinning dope supplies of diifering charaeteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for pumping the spinning dopes under pressure through said conduits, said pumps being of the same capacity, a difierential gear drive for said pumps, a motor for driving said difierential gear, brake means for stopping said pumps alternately, and meansoperable by said motor for operating said brake means.
Apparatus for spinning constant denier filaments av n a r a n segments o e i a a t s s with a substantial zone of difiusion therebetween pom prising two spinning dope supplies of differing character- Y 4 istics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for pumping the spinning dopes under pressure through said conduits, a difierential gear drive for said pumps, a motor for driving said difierential gear, brake means for said pumps, a rocker arm for alternately operating said brake means, means to rock saidrocker arm in one direction to operate one of said brake means and means to rock said rocker arm in the opposite direction to operate the other brake, means.
Apparatus for spinning constant denier filaments having alternating segments of differing characteristics 7 comprising two spinning dope supplies of differing characteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for pumping the spinning dopes under pressure through said conduits, said pumps being of the same capacity, a differential gear drive for said pumps, a motor for driving said difierential gear, cam means driven by said motor, switch means operated by said cam means,
Apparatus for spinning constant denier filaments having alternating segments of dilfering characteristics comprising two spinning dope supplies of difiering characteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each 7 of said conduits for pumping the spinning dopes under pressure through said conduits, said pumps being of the same capacity, a difierential gear drive for said pumps, a motor for driving said differential gear, brake means for stopping saidpumps, a rocker arm for alternately operating said brake means, a solenoid operable upon energization to rock said rocker. arm in one direction to operate oneof said brake means and stop. one of said pumps and operable upon de-energization to rock said rocker arm in the opposite direction to operate the other brake means and stop the other pump, n electric circuit for said solenoid including a switch, and means operable by said motor for operating said switch.
Apparatus for spinning constant denier filaments having alternating segments of difiering characteristics comprising two spinning dope supplies of difiering characteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for pumping the spinning dopes under pressure through said conduits, said pumps being of the.
a differential gear drive forsaid pumps a motor for driving said difierential gear, brake means for stopping said pumps, a rocker arm “for alternately operating said brake means, a solenoid operable upon energization to rock saidrocker arm in one direction to operate one of said brake means and stop one of said pumps and operable upon de-energigation to rock said rocker arm in the opposite direction to operate the other brake means and stop the other pump, an electric circuit for said solenoid including a switch, rotary cam means for operating said switch, said cam means being driven by said motor and serving to maintain said switch closed during one-half its revolution and permitting said switch to open during the other half.

Description

May 9, 1961 E. K. BAUER APPARATUS FOR PRODUCING ARTIFICIAL FILAMENTS Filed May 12, 1958 A? EE 1 United States Patent APPARATUS FOR PRODUCING ARTIFIC FILAMENTS Ernest K. Bauer, Meadville, Pa., assignor to American Viscose Corporation, Philadelphia, Pa., a corporation of Delaware 7 Filed Ma 12, 1958, Ser. No. 734,717 7 Claims. 01. 137-567) The present invention relates to a system or apparatus for producing artificial filaments and more particularly, artificial filaments having alternating segments of differing characteristics such as difierent colors.

Among the conditions afiecting the denier of artificial filaments is the pressure and volume of flow of the spinstant flow of a spinning solution of a particular color or other characteristic and periodically adding to the basic spinning solution a second solution which imparts a different color or characteristic to the material extruded through the spinneret orifices, and during the periods while the second solution is being added there is an increased flow through the orifices with the result that the filaments are characterized by alternating segments of varied cross-section. For example, when spinning filaments of alternating white and red segments, the red segments will generally have a greater cross-sectional area than the white segments because of the addition of the red dye to the normal flow of the white spinning solu tion. Another difiiculty encountered in spinning filaments having alternating segments of differing characteristics has been the inability to provide sharp lines of demarcation between the segments. 7

It is an object of the present invention to provide an apparatus for spinning constant denier filaments having alternating segments of difiering characteristics such as difierent colors.

It is a further object of the invention to provide an apparatus for spinning filaments of the type referred to wherein by proper manipulation of the apparatus either sharp lines of demarcation may be provided between the alternating segments or a zone may be provided between the alternating segments characterized by a mixture of the components of the alternating segments, that is, to say, in the case of different colors there may be a sharp line of demarcation between the colors or there may be a substantial zone between the two colors comprised of a mixture of the two colors.

Other and further objects, features and advantages of the invention will become apparent as a description of a preferred embodiment thereof proceeds.

Referring now to the drawings:

Figure 1 is a diagrammatic showing of the system of the present invention, and

Figure 2 is an elevational view of a device employed for controlling the operation of the two pumps forming a part of the system.

Two differently colored or otherwise differently characterized supplies of spinning solutions or dopes are contained in the tanks 10 and 11 from which they are pumped respectively through

conduits

12 and 13 for extrusion through a common spinneret or jet 14 connected by a relatively short length of pipe 15 to the two conduits. .The spinning solutions may be viscose, acetate or any other solutions which may be spun by wet or dry spinning methods to form filaments. The

conduits

12 and 13 may contain

filters

16 and 17, respectively, such as ordinarily employed in heretofore known spinning systems.

In the ordinary case, when spinning filaments from a single solution,.a positive displacement pump, such as a gear pump, is provided in the line at a point close to the tion to the ordinary difierential found in an automobile.

The driving gear of the ditierentialis driven by a sprocket chain 25 from a sprocket wheel 26 provided on the output shaft of a speed reduction unit 27, the input of which may be driven from any suitable constant speed motor 28.

As previously mentioned, among the conditions afiecting the denier of the filaments formed by extrusion of the spinning solution through the spinneret is the pressureand volume of flow of the spinning solution. Since the present invention contemplates the production of filaments having a constant denier or cross-sectional area throughout their length, means is provided for continuously supplying the spinneret with a constant volume and pressure of spinning solution. Since the two pumps 18,

and 19 are driven from a diiferential gear, when one of said pumps is stopped the other one will bedriven at twice the speed at which it would be driven were the two pumps being operated simultaneously. This, of course, is characteristic of a difierential gear drive.

In order to stop the two

pumps

18 and 19 alternately,- positive brake means are provided in the form of teeth 29' and 30 formed on the ends of a common rocker arm 31 pivotally mounted at 32. The rocker arm 31 may be rocked by means of a solenoid 33, the armature of which is connected to said rocker arm so that when said solenoid is energized the rocker arm is rocked to engage the tooth 29 with the drive gear 20 and upon de-energization said solenoid rocks the rocker arm in the opposite direction to engage the tooth 30 with the drive gear 21. In practice, the

gears

20 and 21 are driven at a fairly low speed so that it is entirely practicable to provide a positive brake of this type.

If the two

pumps

18 and 19 were allowed to operate simultaneously without any braking action upon either of them, equal amounts of the spinning dopes from tanks 10 and 11 would be supplied to the. spinneret and in the event that the two dopes were of different colors, the

tem of this invention the two pumps are never allowed to' operate at the same time, but when one of them is stopped the difierential gear immediately delivers its full power to the other pump and thus there always be a particular quantity of spinning solution supplied to the spin- Patented May 9, 1961 3 neret, the supply consisting alternately of one or the other of the difierently characterized spinning solutions. When the stopping of the pumps is abrupt as is the case with a positive type brake, the resultant filaments have a sharpline of demarcation" between the difierently characterized segments.

In the event that it is desired to produce constant denier filaments having alternating segments of diflering characteristics connected by zones wherein the filaments have a mixture of characteristics, a friction brake will be provided instead of the positive brake so that it is possible to stop the pumps gradually instead of abruptly. In this instance the one pump will be speeded up by the differential gear 24 in direct proportion to the slowing down of the other so that during the period while both pumps are operating, some of each of the spinning dopes will be. supplied to the spinneret to thus produce between the segments of difiering characteristics a zone consisting of a mixture, but nevertheless of the same denier.

In order to automatically produce filaments having alternating segments of the same length, the output shaft of the speed reduction unit 27 carries a cam 34 having one-half of its periphery of a different radius from the other half and this cam cooperates with a follower 35 provided on the operating arm of a micro switch 36 connected in a circuit including'the solenoid 33. The switch 36 may be so arranged as to cause energization of the solenoid either when the follower 35 is on the high or low portion of the periphery of the cam 34 and de-,

energized when said follower is on the other portion of said cam to thus rock the rocker arm 31in first one direction and then the other to alternately stop or slow down the

pumps

18 and 19.

' Having thus described a preferred embodiment of the invention, what is claimed is:

1. In an apparatus for spinning constant denier filaments having alternating segments of difiering character istics, two spinning dope supplies of difiering characteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for pumping the spinning dopes under pressure through said conduits, a difierentialdrive for said pumps, a motor for driving said diiferential drive, brakes for said pumps, means for alternately operating said brakes, said difierential drive speeding up one pump in direct proportion to the slowing down of the other whereby spinning dope will be supplied to the outlet at a constant rate.

2. Apparatus for spinning constant. denier filaments havingalternating segments of difiering characteristics comprising two spinning dope supplies of differing .characteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for supplying pressure to the spinning dopes, said pumps being of the same capacity, a diflerential gear drive for said pumps, and means for alternately interrupting the operationof said pumps, said. differential drive increasing the speed of the operating pump when the other pump is stopped whereby the total supply of spinning dope to the outlet remains constant.

3. Apparatus for spinning constant denier filaments having alternating segments of differing characteristics comprising two spinning dope supplies of diifering charaeteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for pumping the spinning dopes under pressure through said conduits, said pumps being of the same capacity, a difierential gear drive for said pumps, a motor for driving said difierential gear, brake means for stopping said pumps alternately, and meansoperable by said motor for operating said brake means.

4. Apparatus for spinning constant denier filaments av n a r a n segments o e i a a t s s with a substantial zone of difiusion therebetween pom: prising two spinning dope supplies of differing character- Y 4 istics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for pumping the spinning dopes under pressure through said conduits, a difierential gear drive for said pumps, a motor for driving said difierential gear, brake means for said pumps, a rocker arm for alternately operating said brake means, means to rock saidrocker arm in one direction to operate one of said brake means and means to rock said rocker arm in the opposite direction to operate the other brake, means.

5. Apparatus for spinning constant denier filaments having alternating segments of differing characteristics 7 comprising two spinning dope supplies of differing characteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for pumping the spinning dopes under pressure through said conduits, said pumps being of the same capacity, a differential gear drive for said pumps, a motor for driving said difierential gear, cam means driven by said motor, switch means operated by said cam means,

a solenoid in a circuit including said switch means,

means operable. by said solenoid upon energization there'- of due to closing of said switch to stop one of said pumps, and means operable upon de-energization of said solenoid for stopping the other of said pumps, said diflerential gear drive maintaining a uniform flow of spinning dope to the common outlet.

6. Apparatus for spinning constant denier filaments having alternating segments of dilfering characteristics comprising two spinning dope supplies of difiering characteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each 7 of said conduits for pumping the spinning dopes under pressure through said conduits, said pumps being of the same capacity, a difierential gear drive for said pumps, a motor for driving said differential gear, brake means for stopping saidpumps, a rocker arm for alternately operating said brake means, a solenoid operable upon energization to rock said rocker. arm in one direction to operate oneof said brake means and stop. one of said pumps and operable upon de-energization to rock said rocker arm in the opposite direction to operate the other brake means and stop the other pump, n electric circuit for said solenoid including a switch, and means operable by said motor for operating said switch.

7. Apparatus for spinning constant denier filaments having alternating segments of difiering characteristics comprising two spinning dope supplies of difiering characteristics, a conduit leading from each dope supply to a common outlet, a positive displacement pump in each of said conduits for pumping the spinning dopes under pressure through said conduits, said pumps being of the.

same capacity, a differential gear drive forsaid pumps, a motor for driving said difierential gear, brake means for stopping said pumps, a rocker arm "for alternately operating said brake means, a solenoid operable upon energization to rock saidrocker arm in one direction to operate one of said brake means and stop one of said pumps and operable upon de-energigation to rock said rocker arm in the opposite direction to operate the other brake means and stop the other pump, an electric circuit for said solenoid including a switch, rotary cam means for operating said switch, said cam means being driven by said motor and serving to maintain said switch closed during one-half its revolution and permitting said switch to open during the other half. 7 i r References Cited in the file of this patent UNITED STATES PATENTS I Bryson Dec. 25, 1934

US734717A 1958-05-12 1958-05-12 Apparatus for producing artificial filaments Expired - Lifetime US2983282A (en)

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Application Number	Priority Date	Filing Date	Title
US734717A US2983282A (en)	1958-05-12	1958-05-12	Apparatus for producing artificial filaments

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US734717A US2983282A (en)	1958-05-12	1958-05-12	Apparatus for producing artificial filaments

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3092029A (en) *	1961-09-05	1963-06-04	Vendo Co	Fluid pumping mechanism
US3318987A (en) *	1963-09-09	1967-05-09	Monsanto Co	Method of multi-component spinning
US3453688A (en) *	1967-02-28	1969-07-08	Monsanto Co	Filament extrusion apparatus
US5656304A (en) *	1994-04-21	1997-08-12	Basf Corporation	Apparatus for melt mixing and spinning synthetic polymers
US20060071022A1 (en) *	2002-11-04	2006-04-06	Graco Minnesota Inc.	Fast set material proportioner
US20130171286A1 (en) *	2011-12-28	2013-07-04	Hon Hai Precision Industry Co., Ltd.	Feeding system
WO2018078562A1 (en) *	2016-10-26	2018-05-03	Association For The Advancement Of Tissue Engineering And Cell Based Technologies & Therapies (A4Tec)	Fibers with segments, their preparation and applications thereof
US20200173058A1 (en) *	2017-06-27	2020-06-04	E. Miroglio Joint- Stock Company	Method for obtaining viscose filament rayon with cyclically varying linear density called "flame" rayon, an installation for the realization of this method, and a product, obtained using this method and this installation

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US1985312A (en) *	1931-10-23	1934-12-25	Tandy A Bryson	Method of and apparatus for controlling a characteristic of a material
US2594064A (en) *	1947-01-09	1952-04-22	O'leary Charles Martin	Power-transmitting system for slush pumps or the like
US2692164A (en) *	1951-04-23	1954-10-19	Armstrong Cork Co	Method and apparatus for controlling differential flow of materials
US2698576A (en) *	1951-10-06	1955-01-04	Du Pont	Automatic control of interstage pressures in pumps
US2815033A (en) *	1954-02-08	1957-12-03	American Viscose Corp	Alternate flow control for fluid streams
US2822574A (en) *	1956-04-17	1958-02-11	American Viscose Corp	Method and means for spinning a banded filament

1958
- 1958-05-12 US US734717A patent/US2983282A/en not_active Expired - Lifetime

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1985312A (en) *	1931-10-23	1934-12-25	Tandy A Bryson	Method of and apparatus for controlling a characteristic of a material
US2594064A (en) *	1947-01-09	1952-04-22	O'leary Charles Martin	Power-transmitting system for slush pumps or the like
US2692164A (en) *	1951-04-23	1954-10-19	Armstrong Cork Co	Method and apparatus for controlling differential flow of materials
US2698576A (en) *	1951-10-06	1955-01-04	Du Pont	Automatic control of interstage pressures in pumps
US2815033A (en) *	1954-02-08	1957-12-03	American Viscose Corp	Alternate flow control for fluid streams
US2822574A (en) *	1956-04-17	1958-02-11	American Viscose Corp	Method and means for spinning a banded filament

Cited By (9)

* Cited by examiner, † Cited by third party
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US3092029A (en) *	1961-09-05	1963-06-04	Vendo Co	Fluid pumping mechanism
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1981-04-15

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Owner name: PROVIDENT ALLIANCE LIFE INSURANCE COMPANY C/O THE