US3797947A - Improvements in sheathed clamps for looped cable ends - Google Patents
Improvements in sheathed clamps for looped cable ends Download PDFInfo
- Publication number
- US3797947A US3797947A US00310702A US3797947DA US3797947A US 3797947 A US3797947 A US 3797947A US 00310702 A US00310702 A US 00310702A US 3797947D A US3797947D A US 3797947DA US 3797947 A US3797947 A US 3797947A
- Authority
- US
- United States
- Prior art keywords
- cable
- clamping member
- clamps
- inner clamping
- sheath
- Prior art date
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 239000002131 composite material Substances 0.000 claims description 6
- RAQQRQCODVNJCK-JLHYYAGUSA-N N-[(4-amino-2-methylpyrimidin-5-yl)methyl]-N-[(E)-5-hydroxy-3-(2-hydroxyethyldisulfanyl)pent-2-en-2-yl]formamide Chemical compound C\C(N(Cc1cnc(C)nc1N)C=O)=C(\CCO)SSCCO RAQQRQCODVNJCK-JLHYYAGUSA-N 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001229 Pot metal Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
- F16G11/02—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with parts deformable to grip the cable or cables; Fastening means which engage a sleeve or the like fixed on the cable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/69—Redundant disconnection blocking means
Definitions
- ABSTRACT An article protecting cable has polygonal inner clamps applied to contiguous portions of the cable inwardly of the looped end portions, said clamps being of a metal sufficiently malleable to permit swaging operations to form detents which project inwardly from all sides of the clamps to bite into and secure the cable extents which pass through the clamps. Covering the inner clamps and secured thereto are similarly shaped polygonal sheaths of a metal relatively harder than that of the clamps to resist cutting or deformation by a thief.
- All of the walls have portions thereof swaged inwardly which bite into the clamp inserted cable end portion in a toed manner whereby a looped cable end fitted with a clamp of the type described will withstand strong pulls to which a thief or tamperer might subject the cable looped end in an effort to withdraw and open the looped cable end and thus obtain surrepticious access to the protected item.
- Thieves and tamperers are becoming more and more artful and, recognizing the possibility that the unprotected metal of the clamp of the type above-mentioned might be vulnerable to the application thereto of a hack-saw, file or other metal cutting tool, the present invention seeks to thwart the last-mentioned possibility by encasing the previously described looped cable end clamp in a relatively hard, impregnable metal sheath or armor jacket which will resist the application of a cutting tool.
- a general object of the invention is to provide composite metallic clamps or fittings for the looped ends of an article protecting cable which prevent the pulling out or opening of the looped ends of the cable and wherein a clamp includes an inner cable end receiving metallic member which can be effectively swaged onto the inserted cable portions, and an outer, conforming metallic, sheath of a metal of greater hardness than that of the inner member to resisting cutting.
- looped cable end composite clamps which are easy to assemble, apply and unite; which are not vulnerable to a tamperer; which are strong and durable and unique and attractive inn appearance; which are practical to manufacture; and which are otherwise well suited for the purposes set forth.
- FIG. 2 is a transverse sectional view taken on line 2-2 of FIG. 1;
- FIG. 3 is a longitudinal sectional view of an applied sheathed clamp taken approximately along line 3-3 in FIG. 1;
- FIG. 4 is an enlarged exploded view showing in perspective a looped end portion of a protective cable having the innerclamp element secured in position ready to have slid thereunto the outer metallic sheath prior to the staking operation by which the sheath is secured to the inner clamp in enveloping relation.
- a flexible steel cable 10 which preferably carries a vinyl coating 11.
- Each end portion of the cable is doubled back to provide suitable sized loops l2.
- a composite clamp generally indicated by the numeral 13 and including an inner metallic clamp element 14 and an outer sheath 15.
- the latter is of a metal having a hardness rating considerably greater than that of the clamp element 14.
- the latter is similar to that disclosed in the co-pending Daniel J. Foote application, Ser. No. 280,328, filed Aug. 14, 1972.
- said clamp element 14 is polygonal with more than four sides with contiguous sides or walls meeting in obtuse angles.
- the illustrated clamp element 14 includes relatively wide and parallel top and bottom walls 16 and 17 with a longitudinal margin of one being connected to a longitudinal margin of the other by connected and angularly related side walls 18 which are relatively narrow.
- the clamp element 14 is also formed with a pair of bores 19 and 20 extending longitudinally therethrough with bore 19 being of smaller diameter than its companion bore 20. The latter receives a coated extent of the cable 10 and the former receives a doubledback loop forming portion of the cable from which the vinyl coating has been stripped.
- each wall of the clamp element is provided with a plurality of swaged depressions 21.
- the swaged extents displace clamp element metal inwardly to form toed indents or detents 22 which bite into and deform portions of the inserted cable extents inwardly of the various walls, with many of the adjacent detents having a converging relationship.
- the metal of the clamp elements should be somewhat malleable or sufficiently soft to permit metal flow.
- said clamp elements may be extruded aluminum alloy or die cast zinc. Consequently, there is a possibility that the clamp elements, if not otherwise protected, might be vulnerable to a hack-saw or other tool applied by a thief.
- each clamp element 14 of a composite clamp 13 an enclosing outer, sheath 15 conforming exactly to the shape of the clamp to which it is applied and enclosing the latter very snugly, as shown in FIGS. 1, 2 & 3.
- a sheath 15 mounted on an extent of the, cable 10 may be slid over its clamp element 14. Then, to insure its nonremovable mounting on its clamp element, the walls of the sheath are, at several areas each over the swaged depressions 21 contacted by a punch or the like,
- Each sheath is preferably formed of case hardened carbon steel and will withstand the application of a hack-saw or other tool thereto.
- a protective cable with looped ends to which the sheathed clamps have been secured may be used for the lock-up" protection of various property items in the manner described in the aforesaid co-pending application.
- the inner clamp elements will prevent the cable loops from being pulled out or opened even ifthe same are subjected to severe pull forces by a thief or tamperer.
- each sheath 15 is firmly secured to its inner clamp member 14 by the punched deformations 23 which make use of and tightly enter various registering clamp element depressions 21.
- sheathed clamps for looped cable ends are simple and effective, are easy to assemble and mount, are strong and tamper-proof, and are generally well adapted for the indicated purposes.
- the combination with a cable having a doubledback end portion to form a loop,- of a composite clamp applied to contiguous portions of the cable inwardly of the loop comprising: an inner clamping member of polygonal shape having a pair of adjacent longitudinal bores therein receiving contiguous portions of the cable, walls of said inner clamping member being formed with swaged depressions which provide detents extending toward said bores in a toed relation to engage bore housed portions of the cable; and a metallic sheath conforming to the shape of the inner clamping member and tightly embracing the latter, certain wall portions of the sheath being formed with inwardly displaced detents to enter certain of the swaged depressions in the inner clamping member to prevent removal of the sheath from the inner clamping member.
Abstract
An article protecting cable has polygonal inner clamps applied to contiguous portions of the cable inwardly of the looped end portions, said clamps being of a metal sufficiently malleable to permit swaging operations to form detents which project inwardly from all sides of the clamps to bite into and secure the cable extents which pass through the clamps. Covering the inner clamps and secured thereto are similarly shaped polygonal sheaths of a metal relatively harder than that of the clamps to resist cutting or deformation by a thief.
Description
United States Patent [191 Foote [451 Mar. 19, 1974 1 IMPROVEMENTS IN SHEATHED CLAMPS FOR LOOPED CABLE ENDS [75] Inventor: Daniel J. Foote, Wauwatosa, Wis.
[73] Assignee: Master Lock Company, Milwaukee.
Wis.
[22] Filed: Nov. 30, 1972 [21] Appl. No.: 310,702
[52] US. Cl. 403/23, 403/212, 315 [51] Int. Cl. F16g 11/00 [58] Field of Search 24/1223, 123 W [56] References Cited UNITED STATES PATENTS 881,407 3/1908 Jewett 24/123 W UX 1.014.506 l/l9l2 Morgan 24/123 W 1,910,269 5/1933 Sunderland 24/123 W UX 2,040,992 5/1936 Harris 24/1223 2.225.865 12/1940 Harris 24/1223 2.587.095 2/1952 Bergan 24/123 W X 3,243.859 4/1966 Savastano et a1. 24/123 W Primary ExaminerDonald A. Griffin Attorney. Agent, or Firm-Curtis B. Morsell, Sr.
[5 7] ABSTRACT An article protecting cable has polygonal inner clamps applied to contiguous portions of the cable inwardly of the looped end portions, said clamps being of a metal sufficiently malleable to permit swaging operations to form detents which project inwardly from all sides of the clamps to bite into and secure the cable extents which pass through the clamps. Covering the inner clamps and secured thereto are similarly shaped polygonal sheaths of a metal relatively harder than that of the clamps to resist cutting or deformation by a thief.
3 Claims, 4 Drawing Figures IMPROVEMENTS IN SHEATHED CLAMPS FOR LOOPED CABLE ENDS BACKGROUND OF THE INVENTION In the co-pending Daniel J. Foote application Ser. No. 280,328, filed Aug. 14, 1972 there is disclosed a metallic clamp for a looped cable end of polygonal shape with the angles between the clamp walls being obtuse. Opposed top and bottom walls are relatively wide while the walls which join the side edges of the top wall with the side edges of the bottom wall are. relatively narrow. All of the walls have portions thereof swaged inwardly which bite into the clamp inserted cable end portion in a toed manner whereby a looped cable end fitted with a clamp of the type described will withstand strong pulls to which a thief or tamperer might subject the cable looped end in an effort to withdraw and open the looped cable end and thus obtain surrepticious access to the protected item. Thieves and tamperers are becoming more and more artful and, recognizing the possibility that the unprotected metal of the clamp of the type above-mentioned might be vulnerable to the application thereto of a hack-saw, file or other metal cutting tool, the present invention seeks to thwart the last-mentioned possibility by encasing the previously described looped cable end clamp in a relatively hard, impregnable metal sheath or armor jacket which will resist the application of a cutting tool.
Applicant is not aware of any similar clamps for looped cable ends, outside of that covered by his aforesaid pending application. which is devoid of the present protective sheath and fails to disclose the same combination with the advantages attributable thereto.
SUMMARY OF THE INVENTION A general object of the invention is to provide composite metallic clamps or fittings for the looped ends of an article protecting cable which prevent the pulling out or opening of the looped ends of the cable and wherein a clamp includes an inner cable end receiving metallic member which can be effectively swaged onto the inserted cable portions, and an outer, conforming metallic, sheath of a metal of greater hardness than that of the inner member to resisting cutting.
Other specific objects of the invention are to provide looped cable end composite clamps which are easy to assemble, apply and unite; which are not vulnerable to a tamperer; which are strong and durable and unique and attractive inn appearance; which are practical to manufacture; and which are otherwise well suited for the purposes set forth.
BRIEF DESCRIPTION OF THE DRAWING which the improved sheathed clamps are applied, the
outer sheath of one clamp being broken away to show a portion of the inner clamp element;
FIG. 2 is a transverse sectional view taken on line 2-2 of FIG. 1;
FIG. 3 is a longitudinal sectional view of an applied sheathed clamp taken approximately along line 3-3 in FIG. 1; and
FIG. 4 is an enlarged exploded view showing in perspective a looped end portion of a protective cable having the innerclamp element secured in position ready to have slid thereunto the outer metallic sheath prior to the staking operation by which the sheath is secured to the inner clamp in enveloping relation.
DESCRIPTION OF THE PREFERRED EMBODIMENT In order to safeguard certain movable, hard-to-lock up possessions a flexible steel cable 10 is provided which preferably carries a vinyl coating 11. Each end portion of the cable is doubled back to provide suitable sized loops l2. Applied to each looped end portion of the cable to prevent loop withdrawal or opening is a composite clamp, generally indicated by the numeral 13 and including an inner metallic clamp element 14 and an outer sheath 15. The latter is of a metal having a hardness rating considerably greater than that of the clamp element 14. The latter is similar to that disclosed in the co-pending Daniel J. Foote application, Ser. No. 280,328, filed Aug. 14, 1972. Briefly, said clamp element 14 is polygonal with more than four sides with contiguous sides or walls meeting in obtuse angles. The illustrated clamp element 14 includes relatively wide and parallel top and bottom walls 16 and 17 with a longitudinal margin of one being connected to a longitudinal margin of the other by connected and angularly related side walls 18 which are relatively narrow. The clamp element 14 is also formed with a pair of bores 19 and 20 extending longitudinally therethrough with bore 19 being of smaller diameter than its companion bore 20. The latter receives a coated extent of the cable 10 and the former receives a doubledback loop forming portion of the cable from which the vinyl coating has been stripped. To non-removably secure the inserted cable extents within the clamp element bores 19 and 20 each wall of the clamp element is provided with a plurality of swaged depressions 21. The swaged extents displace clamp element metal inwardly to form toed indents or detents 22 which bite into and deform portions of the inserted cable extents inwardly of the various walls, with many of the adjacent detents having a converging relationship. In order that the walls of the clamp elements may be successfully swaged to deform inner extents of metal to provide the cable engaging detents 22 the metal of the clamp elements should be somewhat malleable or sufficiently soft to permit metal flow. Hence, said clamp elements may be extruded aluminum alloy or die cast zinc. Consequently, there is a possibility that the clamp elements, if not otherwise protected, might be vulnerable to a hack-saw or other tool applied by a thief.
To counter-act the last-mentioned possibility the present invention provides for each clamp element 14 of a composite clamp 13, an enclosing outer, sheath 15 conforming exactly to the shape of the clamp to which it is applied and enclosing the latter very snugly, as shown in FIGS. 1, 2 & 3. As shown in FIG. 4 a sheath 15 mounted on an extent of the, cable 10 may be slid over its clamp element 14. Then, to insure its nonremovable mounting on its clamp element, the walls of the sheath are, at several areas each over the swaged depressions 21 contacted by a punch or the like,
which, through striking operations, forces metal stock into the clamp element depressions 21, as indicated by the numerals 23. Each sheath is preferably formed of case hardened carbon steel and will withstand the application of a hack-saw or other tool thereto.
A protective cable with looped ends to which the sheathed clamps have been secured may be used for the lock-up" protection of various property items in the manner described in the aforesaid co-pending application. As there disclosed the inner clamp elements will prevent the cable loops from being pulled out or opened even ifthe same are subjected to severe pull forces by a thief or tamperer. Each clamp element 14, being sheathed by a conforming member which is formed of case hardened carbon steel, serves asran armor jacket to prevent severance by an applied tool. Moreover, each sheath 15 is firmly secured to its inner clamp member 14 by the punched deformations 23 which make use of and tightly enter various registering clamp element depressions 21.
From the foregoing description it will be evident that the sheathed clamps for looped cable ends are simple and effective, are easy to assemble and mount, are strong and tamper-proof, and are generally well adapted for the indicated purposes.
What is claimed as the invention:
1. The combination with a cable having a doubledback end portion to form a loop,- of a composite clamp applied to contiguous portions of the cable inwardly of the loop, comprising: an inner clamping member of polygonal shape having a pair of adjacent longitudinal bores therein receiving contiguous portions of the cable, walls of said inner clamping member being formed with swaged depressions which provide detents extending toward said bores in a toed relation to engage bore housed portions of the cable; and a metallic sheath conforming to the shape of the inner clamping member and tightly embracing the latter, certain wall portions of the sheath being formed with inwardly displaced detents to enter certain of the swaged depressions in the inner clamping member to prevent removal of the sheath from the inner clamping member.
2. The combination recited in claim 1 wherein the sheath is'formed of a metal having a hardness rating greater than that of the inner clamping member.
3. The combination recited in claim 1 wherein the swaged depressions formed in walls of the inner clamping member extend inwardly from outer surface portions of said member and the detents with which certain wall portions of thee sheath are formed seat tightly in certain of the inner clamping member depressions.
Claims (3)
1. The combination with a cable having a doubled-back end portion to form a loop, of a composite clamp applied to contiguous portions of the cable inwardly of the loop, comprising: an inner clamping member of polygonal shape having a pair of adjacent longitudinal bores therein receiving contiguous portions of the cable, walls of said inner clamping member being formed with swaged depressions which provide detents extending toward said bores in a ''''toed'''' relation to engage bore housed portions of the cable; and a metallic sheath conforming to the shape of the inner clamping member and tightly embracing the latter, certain wall portions of the sheath being formed with inwardly displaced detents to enter certain of the swaged depressions in the inner clamping member to prevent removal of the sheath from the inner clamping member.
2. The combination recited in claim 1 wherein the sheath is formed of a metal having a hardness rating greater than that of the inner clamping member.
3. The combination recited in claim 1 wherein the swaged depressions formed in walls of the inner clamping member extend inwardly from outer surface portions of said member and the detents with which certain wall portions of thee sheath are formed seat tightly in certain of the inner clamping member depressions.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US31070272A | 1972-11-30 | 1972-11-30 |
Publications (1)
Publication Number | Publication Date |
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US3797947A true US3797947A (en) | 1974-03-19 |
Family
ID=23203740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00310702A Expired - Lifetime US3797947A (en) | 1972-11-30 | 1972-11-30 | Improvements in sheathed clamps for looped cable ends |
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US (1) | US3797947A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4236281A (en) * | 1979-01-22 | 1980-12-02 | Bottum Charles F | Rope attaching device |
US5481888A (en) * | 1994-08-19 | 1996-01-09 | Perry; Robert C. | Termination device for flexible cable |
US5489174A (en) * | 1994-08-05 | 1996-02-06 | Yonco Corporation | Locking system for threaded fasteners |
US5529422A (en) * | 1991-07-09 | 1996-06-25 | Ligertwood; Peter | Coupling for a modular construction system |
EP0933556A1 (en) * | 1997-11-22 | 1999-08-04 | GRIWE Innovative Umformtechnik GmbH | Fastening of cables |
US6659382B2 (en) * | 2001-07-10 | 2003-12-09 | Vira Manufacturing, Inc. | Security device for display of hand held items |
US20150122067A1 (en) * | 2012-04-23 | 2015-05-07 | Casar Drahtseilwerk Saar Gmbh | Force transmission unit |
US10890015B2 (en) | 2018-09-21 | 2021-01-12 | Knox Associates, Inc. | Electronic lock state detection systems and methods |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US881407A (en) * | 1907-03-21 | 1908-03-10 | Milford E Jewett | Sealing device for money-bags. |
US1014506A (en) * | 1910-04-09 | 1912-01-09 | William A Morgan | Package-binder. |
US1910269A (en) * | 1931-01-30 | 1933-05-23 | Roeblings John A Sons Co | Compression joint and method of making the same |
US2040992A (en) * | 1933-02-28 | 1936-05-19 | Warren B Harris | Flexible connection |
US2225865A (en) * | 1939-01-07 | 1940-12-24 | Warren B Harris | Harness cord |
US2587095A (en) * | 1947-04-08 | 1952-02-26 | Thomas & Betts Corp | Electric cable connector |
US3243859A (en) * | 1965-10-19 | 1966-04-05 | Bergen Wire Rope Co | Steel fittings for looped, steel, wire rope cables |
-
1972
- 1972-11-30 US US00310702A patent/US3797947A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US881407A (en) * | 1907-03-21 | 1908-03-10 | Milford E Jewett | Sealing device for money-bags. |
US1014506A (en) * | 1910-04-09 | 1912-01-09 | William A Morgan | Package-binder. |
US1910269A (en) * | 1931-01-30 | 1933-05-23 | Roeblings John A Sons Co | Compression joint and method of making the same |
US2040992A (en) * | 1933-02-28 | 1936-05-19 | Warren B Harris | Flexible connection |
US2225865A (en) * | 1939-01-07 | 1940-12-24 | Warren B Harris | Harness cord |
US2587095A (en) * | 1947-04-08 | 1952-02-26 | Thomas & Betts Corp | Electric cable connector |
US3243859A (en) * | 1965-10-19 | 1966-04-05 | Bergen Wire Rope Co | Steel fittings for looped, steel, wire rope cables |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4236281A (en) * | 1979-01-22 | 1980-12-02 | Bottum Charles F | Rope attaching device |
US5529422A (en) * | 1991-07-09 | 1996-06-25 | Ligertwood; Peter | Coupling for a modular construction system |
US5489174A (en) * | 1994-08-05 | 1996-02-06 | Yonco Corporation | Locking system for threaded fasteners |
US5481888A (en) * | 1994-08-19 | 1996-01-09 | Perry; Robert C. | Termination device for flexible cable |
EP0933556A1 (en) * | 1997-11-22 | 1999-08-04 | GRIWE Innovative Umformtechnik GmbH | Fastening of cables |
US6659382B2 (en) * | 2001-07-10 | 2003-12-09 | Vira Manufacturing, Inc. | Security device for display of hand held items |
US20150122067A1 (en) * | 2012-04-23 | 2015-05-07 | Casar Drahtseilwerk Saar Gmbh | Force transmission unit |
US9726215B2 (en) * | 2012-04-23 | 2017-08-08 | Casar Drahtseilwerk Saar Gmbh | Force transmission unit |
US10890015B2 (en) | 2018-09-21 | 2021-01-12 | Knox Associates, Inc. | Electronic lock state detection systems and methods |
US11598121B2 (en) | 2018-09-21 | 2023-03-07 | Knox Associates, Inc. | Electronic lock state detection systems and methods |
US11933075B2 (en) | 2018-09-21 | 2024-03-19 | Knox Associates, Inc. | Electronic lock state detection systems and methods |
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