US4855720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-theft ski alarm
Assignee: Individual
•
Filing: 1988-05-20
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Granted: 1989-08-08
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Expires: 2008-05-20
Abstract
Abstract An anti-theft ski alarm has a generally rectangular housing having a flat bottom surface provided with a slot. A peg having an enlarged head portion adapted to be received within the slot is secured to the upper surface of a ski to be protected. The enlarged head of the peg is inserted into the slot and an arming switch of the device is actuated, which causes a latch to block removal of the peg from the slot. A spring biased solenoid rod operates to block opening of the latch unless a code is correctly entered on a keypad. When the correct code is entered, a relay energizes the solenoid to retract the solenoid rod allowing the latch to be moved to an open position. An audible alarm within the device is actuated by a vibration switch which detects movement of the skis. The keypad includes a plurality of "dummy" keys to prevent breaking of the code sequence.
Inventors
- 👤 Leo P. Donovan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:28
CPC Classifications
A; A63; A63C; A63C11/00; A63C11/004; A63C11/005; G; G08; G08B; G08B13/00; G08B13/02; G08B13/14; G08B13/1436
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
159 words
An anti-theft alarm, comprising: hollow housing means; planar floor plate means on said housing means; peg means, having an enlarged head portion, for securement to an article to be protected against theft; aperture means, dimensioned to receive said enlarged head portion of said peg means, formed through said floor plate means; latch means in said housing means for selective locking engagement with said peg means; audible alarm means in said housing; means for selectively activating alarm means; means for selectively locking and unlocking said latch means; coded electrical interlock means for preventing said alarm activating means from being deactivated, and said latch locking means from being unlocked, unless a proper code sequence is entered; said coded electrical interlock means including an electrical solenoid in said housing for abutment with said latch means; and a plurality of code keys and a plurality of dummy keys connected to said solenoid for energizing said solenoid upon entry of a correct code sequence.
Claim 2
Dependent Claim
159 words
An anti-theft alarm, comprising: hollow housing means; planar floor plate means on said housing means; peg means, having an enlarged head portion, for securement to an article to be protected against theft; aperture means, dimensioned to receive said enlarged head portion of said peg means, formed through said floor plate means; latch means in said housing means for selective locking engagement with said peg means; audible alarm means in said housing; means for selectively activating alarm means; means for selectively locking and unlocking said latch means; coded electrical interlock means for preventing said alarm activating means from being deactivated, and said latch locking means from being unlocked, unless a proper code sequence is entered; said coded electrical interlock means including an electrical solenoid in said housing for abutment with said latch means; and a plurality of code keys and a plurality of dummy keys connected to said solenoid for energizing said solenoid upon entry of a correct code sequence.
Claim 3
Dependent Claim
23 words
The anti-theft alarm of claim 1, further comprising an electrical relay and vibration switch means operably connecting for energizing said audible alarm means.
Claim 4
Dependent Claim
21 words
The anti-theft alarm of claim 2, further comprising a plurality of dummy keys operably connected for energizing said audible alarm means.
Claim 5
Dependent Claim
107 words
The anti-theft alarm of claim 1, wherein said interlock means comprises: battery means; a plurality of normally open push button switches connected in series with said battery means and said solenoid; a plurality of normally closed push button switches connected in series with said battery means and said solenoid; a relay, and an alarm activation switch connected in series with said battery means and said audible alarm, and in parallel with said solenoid; a plurality of normally open push button switches connected in parallel with said audible alarm for energizing said relay; and a vibration switch connected in parallel with said audible alarm for energizing said relay.
Claim 6
Dependent Claim
107 words
An anti-theft alarm, comprising: hollow housing means; planar floor plate means on said housing means; aperture means, formed through said floor plate means; peg means for securement to an article to be protected against theft, said peg means having a first enlarged head portion connected by a reduced diameter cylindrical shank to a second head portion dimensioned to be received through links of a chain and through said aperture means; latch means in said housing means for selective locking engagement with said peg means; audible alarm means in said housing; means for selectively activating said alarm means; and means for selectively locking and unlocking said latch means.
Claim 7
Dependent Claim
107 words
An anti-theft alarm, comprising: hollow housing means; planar floor plate means on said housing means; aperture means, formed through said floor plate means; peg means for securement to an article to be protected against theft, said peg means having a first enlarged head portion connected by a reduced diameter cylindrical shank to a second head portion dimensioned to be received through links of a chain and through said aperture means; latch means in said housing means for selective locking engagement with said peg means; audible alarm means in said housing; means for selectively activating said alarm means; and means for selectively locking and unlocking said latch means.
Claim 8
Dependent Claim
103 words
An anti-theft alarm, comprising: hollow housing means; planar floor plate means on said housing means; peg means, having an enlarged head portion, for securement to an article to be protected against theft; aperture means, dimensioned to receive said enlarged head portion of said peg means, formed through said floor plate means; latch means in said housing means for selective locking engagement with said peg means; said latch means including a pair of perpendicular arms connected at a notched yoke portion; audible alarm means in said housing; means for selectively activating said alarm means; and means for selectively locking and unlocking said latch means.
Claim 9
Dependent Claim
103 words
An anti-theft alarm, comprising: hollow housing means; planar floor plate means on said housing means; peg means, having an enlarged head portion, for securement to an article to be protected against theft; aperture means, dimensioned to receive said enlarged head portion of said peg means, formed through said floor plate means; latch means in said housing means for selective locking engagement with said peg means; said latch means including a pair of perpendicular arms connected at a notched yoke portion; audible alarm means in said housing; means for selectively activating said alarm means; and means for selectively locking and unlocking said latch means.
Claim 10
Dependent Claim
27 words
The anti-theft alarm of claim 6, further comprising guide channel means in said housing mounting said latch means for reciprocal sliding movement between locked and unlocked positions.
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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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |