Patent US4853676A successfully refreshed from Google Patents.
US4853676A
Expired / Lapsed
US
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Security device
Assignee: Cardgard Ltd
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Filing: 1988-03-23
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Granted: 1989-08-01
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Expires: 2008-03-23
Abstract
Abstract A security device for credit cards, charge cards, cash cards and the like has a base, an integrally molded top partially extending along the length of the base and a lid pivotally secured to one end of the base. A key pad is recessed into the top. The lid has an electrically operated latch operated by the key pad. A cartridge for the cards is formed of cardboard bent into a serpentine format to provide an upper compartment and a lower compartment, each compartment being suitable for holding up to four cards each. The internal surfaces of the cartridge are coated with a pyrotechnic material and a heating coil is connected to the cartridge. An authorized user of the device has a personal code which when inputted via the key pad opens the lid. Incorrect input of the code causes a piezoelectric bleeper to sound. Two incorrect input sequences are permitted but on the third incorrect sequence the coil causes the pyrotechnic solution on the cartridge to heat up and destroy the cards within the device. A water tamper device is provided which will also cause the cartridge to destroy the cards if the device is immersed in water. A conductive inlay is provided around the inside of the device so that if the inway is open circuited by an unauthorized attempt at entry into the device by, for example, drilling or sawing, the cartridge will again destroy the cards held within the device.
Inventors
- 👤 Jacques B. Kitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:43
CPC Classifications
G; G06; G06F; G06F1/00; G07; G07F; G07F7/00; G07F7/08; A; A45; A45C; A45C11/00; A45C11/18; A45C11/182; A45C13/00; A45C13/18; A45C13/24; E; E05; E05G; E05G1/00; E05G1/14; G06K; G06K19/00; G06K19/005; G07F7/0806; G07F7/0833
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
112 words
A security device arranged to hold at least one credit card, charge card, cash card and the like comprising a container having a lid, at least one compartment for cards in said container, locking means arranged to secure said lid to said container until said locking means are released, a waterproof pyrotechnic solution coated on the internal surfaces of said at least one compartment for destroying said cards, trigger means arranged to be activated by said locking means for triggering said pyrotechnic solution, and counting means for permitting a predetermined number of incorrect attempts at operating said locking means before said locking means activates said trigger means to trigger said pyrotechnic solution.
Claim 2
Dependent Claim
112 words
A security device arranged to hold at least one credit card, charge card, cash card and the like comprising a container having a lid, at least one compartment for cards in said container, locking means arranged to secure said lid to said container until said locking means are released, a waterproof pyrotechnic solution coated on the internal surfaces of said at least one compartment for destroying said cards, trigger means arranged to be activated by said locking means for triggering said pyrotechnic solution, and counting means for permitting a predetermined number of incorrect attempts at operating said locking means before said locking means activates said trigger means to trigger said pyrotechnic solution.
Claim 3
Dependent Claim
32 words
A security device as claimed in claim 1 wherein said counting means is connected to a warning device arranged to produce a signal indicative of each incorrect operation of said locking means.
Claim 4
Dependent Claim
16 words
A security device as claimed in claim 2 wherein said warning device is an audible buzzer.
Claim 5
Dependent Claim
23 words
A security device as claimed in claim 2 wherein the pyrotechnic solution is activated on the third incorrect operation of said locking means.
Claim 6
Dependent Claim
28 words
A security device as claimed in claim 1 wherein said pyrotechnic solutuion is safety match compound waterproofed by a solution of 10% by volume shellac and methylated spirit.
Claim 7
Dependent Claim
28 words
A security device as claimed in claim 1 wherein two compartments are formed by folding cardboard, the internal surfaces of which are coated with the waterproof pyrotechnic solution.
Claim 8
Dependent Claim
51 words
A security device as claimed in claim 1 wherein the locking means comprises a digital key pad arranged to apply signals to an electrical circuit means which includes said trigger means, said counting means and a relay, whereby correct operation of said key pad actuates said relay to release said lid.
Claim 9
Dependent Claim
38 words
A security device as claimed in claim 7 wherein said key pad and said electrical circuit means is capable of accepting up to seven digits keyed in a correct sequence as being indicative of a user's personal code.
Claim 10
Dependent Claim
31 words
A security device as claimed in claim 8 wherein said key pad and said electrical circuit means are adapted to permit a user to enter or change a user's personal code.
Claim 11
Dependent Claim
53 words
A security device as claimed in claim 7 wherein the container and the lid have an electrically conductive layer built thereinto which is connected to said electrical circuit means and which layer when open circuited by other than correct operation of said key pad actuates said trigger means to trigger said pyrotechnic solution.
Claim 12
Dependent Claim
47 words
A security device as claimed in claim 7 wherein a water tamper means is provided connected to said electrical circuit means, whereby when said device is immersed in water said water tamper means produces an electrical signal to activate said trigger means to trigger said pyrotechnic solution.
Claim 13
Dependent Claim
51 words
A security device as claimed in claim 11 wherein said water tamper means comprise means for determining a change in resistance between a pair of adjacent conductive members, said conductive members being in fluid communication with aperture means in said container for permitting water to pass therethrough onto said conductive members.
Claim 14
Dependent Claim
37 words
A security device as claimed in claim 7 wherein the circuit means is energised by at least one electrical cell and an audible indicator is provided for indicating when said cell voltage is below a predetermined value.
Claim 15
Dependent Claim
69 words
A security device as claimed in claim 1 wherein the container comprises a base portion and a top portion in which said key pad is located, said top portion extending partially along the length of said base portion, said lid being pivotally attached to one end of said base portion and adapted to close the remaining length of said base portion and to be congruent with said top portion.
Claim 16
Dependent Claim
169 words
A security device arranged to hold at least one credit card, charge card, cash card and the like comprising a container having a lid, locking means arranged to secure said lid to said container until said locking means are released, defacing means within said container for defacing said cards, trigger means arranged to be activated by said locking means for triggering said defacing means, counting means for permitting a predetermined number of incorrect attempts at operating said locking means before said locking means activates said trigger means to trigger said defacing means, said locking means including a digital keypad arranged to apply signals to an electrical circuit means which includes said trigger means, said counting means and a relay, whereby correct operation of said keypad activates said relay to release said lid, and a water tamper means connected to said electrical circuit means, whereby when said device is immersed in water said water tamper means produces an electrical signal to activate said trigger means to trigger said defacing means.
Claim 17
Dependent Claim
169 words
A security device arranged to hold at least one credit card, charge card, cash card and the like comprising a container having a lid, locking means arranged to secure said lid to said container until said locking means are released, defacing means within said container for defacing said cards, trigger means arranged to be activated by said locking means for triggering said defacing means, counting means for permitting a predetermined number of incorrect attempts at operating said locking means before said locking means activates said trigger means to trigger said defacing means, said locking means including a digital keypad arranged to apply signals to an electrical circuit means which includes said trigger means, said counting means and a relay, whereby correct operation of said keypad activates said relay to release said lid, and a water tamper means connected to said electrical circuit means, whereby when said device is immersed in water said water tamper means produces an electrical signal to activate said trigger means to trigger said defacing means.
Claim 18
Dependent Claim
51 words
A security device as claimed in claim 15 wherein said water tamper means comprise means for determining a change in resistance between a pair of adjacent conductive members, said conductive members being in fluid communication with aperture means in said container for permitting water to pass therethrough onto said conductive members.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |