US3425730A - Tamper-proof seal - Google Patents
Tamper-proof seal Download PDFInfo
- Publication number
- US3425730A US3425730A US560160A US3425730DA US3425730A US 3425730 A US3425730 A US 3425730A US 560160 A US560160 A US 560160A US 3425730D A US3425730D A US 3425730DA US 3425730 A US3425730 A US 3425730A
- Authority
- US
- United States
- Prior art keywords
- hook
- box
- opening
- seal
- barbs
- 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
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Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/03—Forms or constructions of security seals
- G09F3/0305—Forms or constructions of security seals characterised by the type of seal used
- G09F3/0347—Forms or constructions of security seals characterised by the type of seal used having padlock-type sealing means
- G09F3/0352—Forms or constructions of security seals characterised by the type of seal used having padlock-type sealing means using cable lock
-
- 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
- Y10T292/00—Closure fasteners
- Y10T292/48—Seals
- Y10T292/494—Interengaging shackle ends, inclosing housing
Definitions
- the main locking feature of the device is a bowed wedge-shaped barbed hook position within a narrow box-like enclosure with a slit type entrance with the sealing means comprising the said hook and an opening on an end of a link or strap adapted to engage the hook, said hook, when flat, being greater than the width of said opening, and when bowed, being able to pass through said opening with close tolerance so that any attempt to tarnper with the seal within the narrow contines of the box will cause the barbs to very out and prevent the hook from passing back through the opening.
- the usual seal of this type has a strap or link portion which is passed through a loop on a container or car door and a loop on the door frame, and then sealed so that the door cannot be opened without breaking either the strap or loop or the sealing means.
- the sealing means comprises an opening on one end of the link or strap of the seal adapted to engage a Wedge shaped hook projection on the other end of the link or strap, said wedge shaped hook projection being positioned within a box or chamber having a narrow slit-type entrance, said wedge shaped hook means comprising a point with a pair of barbs in bowed cross section with the distance between the points of said barbs, when flat, being greater than the width of the opening so that after t'he hook passes through the entrance opening, any attempt to tamper with the seal will cause the barbs to vflatten out and render the hook incapable of passing back through the opening.
- the seal cannot be opened without being destroyed, thereby rendering it effectively tamper proof and a means to determine whether or not a door or enclosure of a particular container or car has been opened by unauthorized persons, and a further advantage of the seal is that it requires a breaking to open the door, thereby furnishing evidence that a particular container, car or enclosure has been burglarized.
- FIG. 1 is a plan view of a blank out of which the invention is made
- FIG. 2 is an elevational view of the blank of FIG. 1 partially folded
- FIG. 3 is a sectional view along the lines 3-3 in FIG. 2;
- FIG. 4 is Ia medial cross section of the invention showing it partially installed on a door and door frame with parts cutaway;
- FIG. 5 is a medial cross section view similar to FIG. 4 with parts cut way showing the seal in locked position;
- FIG. 6 is a top plan view of the seal with parts cut -away showing the relative positions of the locked parts
- FIG. 7 is a view of the locking parts in position similar to FIG. 6;
- FIG. 8 is a View similar to FIG. 7.
- the blank 10 is stamped out of metal such as a thin llexible steel ribbon.
- the central portions comprise a link or strap 12.
- Box 32 is made by folding tab 22 inwardly and then by folding sheet-like portion 16. After the folds are made, 22 and sheet-like portion 16. After the folds are made, edges 34 are fastened together to form the box by means of crirnps 20 or any other fastening means: known to the art. This type of construction is illustrated in United States Patent No. 3,068,033 granted to George G. C-anter and Gilbert G. Canter on Dec. 11, 1962. When the box is completed, it will have a very narrow entrance 40 forming a limited access opening adjacent the strap portion 12. The second end 42 is somewhat reduced in width so that it may easily be pushed into opening 40.
- Second end 42 also comprises a cutout portion 46 which is adapted to engage hook 24. Cutout portion 46 also has a locking tab 48 which is bent outwardly along fold. line 45 at its leading end to aid in engaging hook 24.
- the wedge shaped hook 24 has a point 50 and a pair of barbs 52 and is connected to tab 22 by means of a very narrow strip or neck 54 of metal of the blank 10.
- the original metal from which the hook 24 is made is flat. However, during the manufacturing process, hook 24 is bowed.
- the distance between barbs 52 is approximately .010 of an inch wider than the width of opening 46 at its widest point (leading end 415).
- FIG. 6 of the drawings in which the distance between barbs 52, when in flat condition, is represented by imaginary parallel lines F, and the distance between the ends of the widest point ⁇ of the opening 46 (leading end 45) is represented by imaginary parallel lines L.
- the distance between lines F-F is approximately .010 of an inch longer than the distance between lines L-L.
- cutout portion S centrally along hook 24. This is an optional feature and may or may not be provided in the device depending on the hardness of metal used. The purpose of providing cutout portion Sti is to render flattening of hook 24 easier when a seal made of harder metal is tampered with.
- the main locking feature of the device is the bowed, wedge shaped, barbed hook 24 positioned between stop 28 and dimple 30. Its function as described is protected by the box 32, preventing disengagement of said hook 24 by any tampering means without destroying the box 32 and the entire seal.
- a tamper-proof seal having a main body portion comprising a strap portion and a pair of ends, a first end of said strap portion comprising a shallow box having a narrow opening, said shallow box comprising a top wall and a bottom wall, said walls being connected together at all edges except the portion of the edge having the narrow opening, a dimple located in one of said walls and catch means located in the other ⁇ of said walls with hook means positioned between said walls and between said dimple and said catch means, said hook means comprising a pair of barbs at its widest portion, said barbs being normally bowed transversely, hook engaging means on the second end of the strap comprising a cutout portion having a wider portion and a narrower portion adapted to iit at its widest part in close tolerance over the barbs of the hook means, said second end of said strap portion being adapted to enter said narrow opening and to engage said hook means with said hook engaging means.
- a tamper-proof seal comprising a strap portion made of a stiff flexible material with the ends of said strap portion comprising locking means, a first end of said strap including a pair of spaced sheets with a hook comprising a point and at least one pair of barbs positioned between them, said spaced sheets being connected to form an enclosed chamber having a limited access opening on one side, said hook being mounted from one of said sheets with the other sheet having a dimple forming an inner recess with said inner recess positioned relatively near the point of said hook so that if the point of said hook is moved toward the said recess, it will move within the said recess; catch means formed on the sheet opposite the dimpled sheet extending inwardly toward the recess of said dimple, with the point of the hook positioned relatively between the dimple and the catch means, hook engaging means on the second end of the strap comprising a locking projection associated with a cutout portion, said barbs of said hook being normally bowed transversely and being relatively narrower in close tolerance than the width of
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Closures For Containers (AREA)
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US56016066A | 1966-06-24 | 1966-06-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3425730A true US3425730A (en) | 1969-02-04 |
Family
ID=24236621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US560160A Expired - Lifetime US3425730A (en) | 1966-06-24 | 1966-06-24 | Tamper-proof seal |
Country Status (1)
Country | Link |
---|---|
US (1) | US3425730A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0071459A2 (en) * | 1981-07-27 | 1983-02-09 | Transecure Limited | Security device |
EP0104288A1 (en) * | 1982-09-29 | 1984-04-04 | Acme Seals Limited | A self-locking seal |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US908186A (en) * | 1908-10-09 | 1908-12-29 | John F Wing | Car-seal. |
US1030458A (en) * | 1912-04-23 | 1912-06-25 | Edward J Brooks | Snap-seal. |
US2804333A (en) * | 1956-10-25 | 1957-08-27 | George G Canter | Car seal |
-
1966
- 1966-06-24 US US560160A patent/US3425730A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US908186A (en) * | 1908-10-09 | 1908-12-29 | John F Wing | Car-seal. |
US1030458A (en) * | 1912-04-23 | 1912-06-25 | Edward J Brooks | Snap-seal. |
US2804333A (en) * | 1956-10-25 | 1957-08-27 | George G Canter | Car seal |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0071459A2 (en) * | 1981-07-27 | 1983-02-09 | Transecure Limited | Security device |
EP0071459A3 (en) * | 1981-07-27 | 1983-06-08 | Transecure Limited | Security device |
EP0104288A1 (en) * | 1982-09-29 | 1984-04-04 | Acme Seals Limited | A self-locking seal |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: AMERICAN CASTING & MANUFACTURING CORPORATION, 51 C Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CANTER, GEORGE;REEL/FRAME:004346/0114 Effective date: 19841219 |
|
AS | Assignment |
Owner name: CITIBANK, N.A. A NATIONAL BANKING ASSOCIATION Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN CASTING & MANUFACTURING CO.;REEL/FRAME:004388/0045 Effective date: 19841116 |
|
AS | Assignment |
Owner name: CITIBANK, N.A.,NEW YORK Free format text: AMENDMENT OF A SECURITY AGREEMENT RECORDED AT REEL 4388 FRAMES 045 THROUGH 055 TO CORRECT THE NAME OF THE ASSIGNOR;ASSIGNOR:AMERICAN CASTING AND MANUFACTURING CORPORATION, (SOMETIMES THROUGH EITHER MISTAKE OR INADVERTANCE ALSO KNOWN AS AMERICAN CASTING & MANUFACTURING CO.);REEL/FRAME:004657/0722 Effective date: 19870106 Owner name: CITIBANK, N.A., 100 JERICHO QUADRANGLE, JERICHO, N Free format text: AMENDMENT OF A SECURITY AGREEMENT RECORDED AT REEL 4388 FRAMES 045 THROUGH 055 TO CORRECT THE NAME OF THE ASSIGNOR;ASSIGNOR:AMERICAN CASTING AND MANUFACTURING CORPORATION, (SOMETIMES THROUGH EITHER MISTAKE OR INADVERTANCE ALSO KNOWN AS AMERICAN CASTING & MANUFACTURING CO.);REEL/FRAME:004657/0722 Effective date: 19870106 |