US3608495A - Apparatus and method for encapsulating fragile components - Google Patents
Apparatus and method for encapsulating fragile components Download PDFInfo
- Publication number
- US3608495A US3608495A US835674A US3608495DA US3608495A US 3608495 A US3608495 A US 3608495A US 835674 A US835674 A US 835674A US 3608495D A US3608495D A US 3608495DA US 3608495 A US3608495 A US 3608495A
- Authority
- US
- United States
- Prior art keywords
- container
- closure member
- fragile
- sidewalls
- encapsulating
- 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
- 238000000034 method Methods 0.000 title description 5
- 239000000463 material Substances 0.000 claims description 12
- 239000000843 powder Substances 0.000 abstract description 10
- 238000007689 inspection Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 238000005056 compaction Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000002904 solvent Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
- B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
- B65D81/09—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using flowable discrete elements of shock-absorbing material, e.g. pellets or popcorn
Definitions
- Fragile components such as a package of telemetering equipment, is assembled into a projectile and fired from a gun into the upper atmosphere. Because of the very high acceleration, or deceleration upon return or upon impact with the earth, the telemetering equipment must be intimately supported to prevent tearing loose of wiring an subassemblies as well as insulated from excessive heat.
- such a fragile component is embedded in a thermoplastic compound which is poured into place while hot and allowed to cool and set.
- the heated compound may soften or otherwise damage materials inside of the fragile component.
- the component in order to recover the component for inspection it may be soaked in a solvent for a number of hours, or reheated, and removed as a sticky mass. The solvent, or reheating, could cause damage to the component and this operation is time consuming.
- the present invention overcomes many of the problems of other methods of encapsulating.
- FIG. 1 is a view of the invention in partial cross section
- FIG. 2 is a sectional view, illustrating the filling and compacting step
- H6. 3 is a view of the container in a filled condition and the cap ready to be affixed.
- Container 1 may have cylindrical walls, or the walls may be slightly tapered in a truncated conical shape.
- the conical walls cause the material 2 being inserted to be wedged and compressed inwardly circumferentially as the material is tamped or pressed downwardly.
- the tapered walls also facilitate removal of the powder 2 therefrom.
- the bottom end closure 3 preferably has an opening 4 therein covered by a plate 5.
- Top end closure 6 is secured to the container 1 by screw threads, clamps, or other known apparatus.
- a fragile article is illustrated at 7. Flats 8, knurling, or such, on container 1 and closure 6 render easier the task of assembling or disassembling the apparatus. Tamping tool 9 and hammer 10 may be used to compact powder 2.
- a powder e.g. soapstone
- tamping tools 9, 10 may be used for further compaction.
- the fragile article is placed inside, additional powder is spooned in therearound and thereover, the container is vibrated, and tools 9, 10 may again be used for compaction.
- the container is slightly overfilled as illustrated in FIG. 3.
- the lid is then screwed or clamped into place thereby placing the already compacted powder under further compression to assure lack of voids and to assure firm holding of the fragile article.
- the container is immovably mounted in an ac cessible portion of the vehicle with the sensory equipment embedded in the powdered material.
- the container with the fragile cargo is removed from the vehicle. Accessibility to this equipment is achieved by unscrewing the cover and tapping plate 5 by use of the shank of tool 9 or other tool.
- the powder and fragile article slide out within a few seconds and with no sticky mess of plastic material as is experienced on the more common method of encapsulating with thermoplastic potting compound. This action is enhanced by the outwardly tapering walls which facilitate the powder removal.
- Iclaim 1. Apparatus for encapsulating fragile equipment compnsing a container having a first end, sidewalls, and a second end, an aperture in said first end, a first closure member covering said aperture, said closure member loosely fitting inside of the sidewalls, a particulate finely divided material filling said container and surrounding the fragile equipment therein, and a second closure member for said second end of said container.
- the housing contains means to connect said second closure member to said container and exert pressure against said particulate finely divided material to eliminate or minimize voids therein and to hold the fragile article under gentle substantially uniform pressure.
Abstract
A fragile article, such as an electronic component being used in a rocket or military projectile vehicle, is embedded in a powder to minimize vibrations, shock and heat effects and to render the packaged article easy of removal for inspection or replacement.
Description
United States Patent Baltzar Leo De Mare Aberdeen, Md.
June 23, 1969 Sept. 28, 1971 The United States of America as represented by the Secretary of the Army Inventor Appl. No. Filed Patented Assignee APPARATUS AND METHOD FOR ENCAPSULATING FRAGILE COMPONENTS 3 Claims, 3 Drawing Figs.
Int. Cl 865d 85/42 Field of Search 206/46, 46
FR, 46 FC;174/52.6; 102/921, 1, 34, 49.34
[56] References Cited UNITED STATES PATENTS 2,780,350 2/1957 Simon et al. 206/46 3,001,105 9/1961 Fox 317/101 Primary Examiner-Robert F. Stahl Attorneys-Harry M. Saragovitz, Edward .1. Kelly, Herbert Berl and Robert P. Gibson ABSTRACT: A fragile article, such as an electronic component being used in a rocket or military projectile vehicle, is embedded in a powder to minimize vibrations, shock and heat effects and to render the packaged article easy of removal for inspection or replacement.
Fragile article APPARATUS AND METHOD FOR ENCAPSULATING FRAGILE COMPONENTS The invention described herein may be manufactured, used and licensed by or for the Government for governmental purposes without the payment to me of any royalty thereon.
BRIEF SUMMARY OF THE INVENTION An idea as to usefulness of the present invention may be gathered from the following example. Fragile components, such as a package of telemetering equipment, is assembled into a projectile and fired from a gun into the upper atmosphere. Because of the very high acceleration, or deceleration upon return or upon impact with the earth, the telemetering equipment must be intimately supported to prevent tearing loose of wiring an subassemblies as well as insulated from excessive heat.
Commonly, such a fragile component is embedded in a thermoplastic compound which is poured into place while hot and allowed to cool and set. However, the heated compound may soften or otherwise damage materials inside of the fragile component. Also, in order to recover the component for inspection it may be soaked in a solvent for a number of hours, or reheated, and removed as a sticky mass. The solvent, or reheating, could cause damage to the component and this operation is time consuming.
The present invention overcomes many of the problems of other methods of encapsulating.
In the drawing:
FIG. 1 is a view of the invention in partial cross section;
FIG. 2 is a sectional view, illustrating the filling and compacting step;
H6. 3 is a view of the container in a filled condition and the cap ready to be affixed.
In use, a powder (e.g. soapstone) is spooned into the container to partially fill it and the container is then vibrated for initial compaction. Then tamping tools 9, 10 may be used for further compaction. The fragile article is placed inside, additional powder is spooned in therearound and thereover, the container is vibrated, and tools 9, 10 may again be used for compaction. The container is slightly overfilled as illustrated in FIG. 3. The lid is then screwed or clamped into place thereby placing the already compacted powder under further compression to assure lack of voids and to assure firm holding of the fragile article. The downward tamping, and pressure from the lid, together with tapered walls 1, wedge" the powder firmly around the fragile article.
In operation, the container is immovably mounted in an ac cessible portion of the vehicle with the sensory equipment embedded in the powdered material. After launch and recovery, the container with the fragile cargo is removed from the vehicle. Accessibility to this equipment is achieved by unscrewing the cover and tapping plate 5 by use of the shank of tool 9 or other tool. The powder and fragile article slide out within a few seconds and with no sticky mess of plastic material as is experienced on the more common method of encapsulating with thermoplastic potting compound. This action is enhanced by the outwardly tapering walls which facilitate the powder removal.
Iclaim: 1. Apparatus for encapsulating fragile equipment compnsing a container having a first end, sidewalls, and a second end, an aperture in said first end, a first closure member covering said aperture, said closure member loosely fitting inside of the sidewalls, a particulate finely divided material filling said container and surrounding the fragile equipment therein, and a second closure member for said second end of said container.
2. The improvement according to claim 1 in which the container sidewalls are tapered outwardly from said first end toward said second end to aid in compressing the material during filling and to aid in removing the material during emptying of the container.
3. The improvement according to claim 1 in which the housing contains means to connect said second closure member to said container and exert pressure against said particulate finely divided material to eliminate or minimize voids therein and to hold the fragile article under gentle substantially uniform pressure.
Claims (3)
1. Apparatus for encapsulating fragile equipment comprising a container having a first end, sidewalls, and a second end, an aperture in said first end, a first closure member covering said aperture, said closure member loosely fitting inside of the sidewalls, a particulate finely divided material filling said container and surrounding the fragile equipment therein, and a second closure member for said second end of said container.
2. The improvement according to claim 1 in which the container sidewalls are tapered outwardly from said first end toward said second end to aid in compressing the material during filling and to aid in removing the material during emptying of the container.
3. The improvement according to claim 1 in which the housing contains means to connect said second closure member to said container and exert pressure against said particulate finely divided material to eliminate or minimize voids therein and to hold the fragile article under gentle substantially uniform pressure.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US83567469A | 1969-06-23 | 1969-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3608495A true US3608495A (en) | 1971-09-28 |
Family
ID=25270161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US835674A Expired - Lifetime US3608495A (en) | 1969-06-23 | 1969-06-23 | Apparatus and method for encapsulating fragile components |
Country Status (1)
Country | Link |
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US (1) | US3608495A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4116337A (en) * | 1976-04-29 | 1978-09-26 | N L Industries, Inc. | Impact absorbing means for shipping cask |
US4366095A (en) * | 1979-09-14 | 1982-12-28 | Eroterv Eromu Es Halozattervezo Vallalat | Process and equipment for the transportation and storage of radioactive and/or other dangerous materials |
US6744637B2 (en) | 2001-11-30 | 2004-06-01 | Alliant Techsystems Inc. | Guided munitions electronics package and method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2780350A (en) * | 1951-12-11 | 1957-02-05 | Lockheed Aircraft Corp | Package with cellular plastic packaging means |
US3001105A (en) * | 1956-11-30 | 1961-09-19 | Arthur B Fox | Glass beads as potting material for electronic assemblies |
-
1969
- 1969-06-23 US US835674A patent/US3608495A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2780350A (en) * | 1951-12-11 | 1957-02-05 | Lockheed Aircraft Corp | Package with cellular plastic packaging means |
US3001105A (en) * | 1956-11-30 | 1961-09-19 | Arthur B Fox | Glass beads as potting material for electronic assemblies |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4116337A (en) * | 1976-04-29 | 1978-09-26 | N L Industries, Inc. | Impact absorbing means for shipping cask |
US4366095A (en) * | 1979-09-14 | 1982-12-28 | Eroterv Eromu Es Halozattervezo Vallalat | Process and equipment for the transportation and storage of radioactive and/or other dangerous materials |
US6744637B2 (en) | 2001-11-30 | 2004-06-01 | Alliant Techsystems Inc. | Guided munitions electronics package and method |
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