US4172254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Merchandise case with door lock alarm
Assignee: COLUMBUS SHOW CASE Co
•
Filing: 1978-02-13
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Granted: 1979-10-23
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Expires: 1998-02-13
Abstract
Abstract A jewelry show case or similar merchandise container is equipped with a door lock and alarm system which is effective to either automatically lock the access doors of the show case in fully closed positions, or signal an open condition of the doors when an authorized attendant leaves his usual station behind the show case.
Inventors
- 👤 Eugene F. Vermillion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:39
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/08; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7006; Y10T70/7028
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
In combination with a merchandise container having an access door movable between container opening and closing positions; a movable door latch positioned within the confines of said container and biased toward a door-engaging position which provides a locking engagement with said door only when said door occupies a fully closed position allowing said latch to be fully extended, said door otherwise blocking extension of said latch; electromagnetic means connected with said latch and energizable to move said latch to a door-disengaging position; manually operable switch means disposed exteriorly of but in close proximity to said container for controlling energization of said electromagnetic means; and signal means electrically connected with said switch means and responsive to the position of said latch and said switch means for signalling an open condition of said door only when said electromagnetic means is deenergized and said latch is not fully extended.
Claim 2
Dependent Claim
146 words
In combination with a merchandise container having an access door movable between container opening and closing positions; a movable door latch positioned within the confines of said container and biased toward a door-engaging position which provides a locking engagement with said door only when said door occupies a fully closed position allowing said latch to be fully extended, said door otherwise blocking extension of said latch; electromagnetic means connected with said latch and energizable to move said latch to a door-disengaging position; manually operable switch means disposed exteriorly of but in close proximity to said container for controlling energization of said electromagnetic means; and signal means electrically connected with said switch means and responsive to the position of said latch and said switch means for signalling an open condition of said door only when said electromagnetic means is deenergized and said latch is not fully extended.
Claim 3
Dependent Claim
14 words
The combination defined in claim 1, wherein said signal means comprises an audible alarm.
Claim 4
Dependent Claim
35 words
The combination defined in claim 1, wherein said container comprises a jewelry show case and said switch means is contained in a floor mat disposed in an area normally occupied by a show case attendant.
References Cited (Backward Citations)
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Cited
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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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |