Patent US3754224A successfully refreshed from Google Patents.
US3754224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security alarm actuating device
Assignee: Individual
•
Filing: 1972-07-14
•
Granted: 1973-08-21
•
Expires: 1992-07-14
Abstract
Abstract The invention is a security device for sensing the unauthorized opening of a gate or the like, the device including an electrical series loop incorporated into a mechanical structure mounted directly on relatively movable members of the gate. Fixedly mounted on one of the gate members is a frame which carries a normally open electrical switch. A rod for operating the switch is removably mounted in the frame in such a position as to engage and hold the switch closed. A lock removably secures the rod to the frame in this switch-closing position. An electrical terminal block is secured to the same gate member and has mechanically and electrically connected thereto the opposite ends of a flexible electrical cable. The cable is mechanically secured between its ends to the rod and is passed around the other gate member so as to prevent more than a predetermined degree of relative movement of said members. The switch and the cable are electrically connected in series such that severing of the cable or opening of the switch by removal of the lock and rod from the frame will result in an open circuit which may be utilized for setting off an alarm.
Inventors
- 👤 W Roy
- 👤 S Pasavage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:30
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/08; Y; Y10; Y10T; Y10T292/00; Y10T292/03; Y10T70/00; Y10T70/80; Y10T70/8027
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
A security alarm device for sensing relative movement of two gate members comprising a frame adapted to be secured to one of said members and mounting an electrical normally open switch provided with an operating member, said frame including guiding means for removably receiving an elongated switch-operating element in position to engage and actuate said operating member, a lock removably securing said element to said frame in said position, electrical terminal block means adapted to be secured to said one member and having opposite ends of an elongated flexible electrical conductor terminated thereon, said conductor being secured between its ends to said element and of a length to be passed around the other of said members so as to prevent more than a predetermined degree of relative movement of said members.
Claim 2
Dependent Claim
131 words
A security alarm device for sensing relative movement of two gate members comprising a frame adapted to be secured to one of said members and mounting an electrical normally open switch provided with an operating member, said frame including guiding means for removably receiving an elongated switch-operating element in position to engage and actuate said operating member, a lock removably securing said element to said frame in said position, electrical terminal block means adapted to be secured to said one member and having opposite ends of an elongated flexible electrical conductor terminated thereon, said conductor being secured between its ends to said element and of a length to be passed around the other of said members so as to prevent more than a predetermined degree of relative movement of said members.
Claim 3
Dependent Claim
53 words
The actuating device of claim 1 wherein said frame has an elongated cavity which slidably receives said switch-operating element, said element and frame having aligned openings when said element is in said position, said lock including a shackle received by said openings for securing said element in position with respect to said frame.
Claim 4
Dependent Claim
32 words
The device of claim 2 in which said lock is manually actuable for removing said shackle from said openings thereby to actuate said switch by removal of said element from said frame.
Claim 5
Dependent Claim
79 words
The device of claim 3 in which said conductor includes a coaxial cable having the ends of the center conductor and conductive sheath connected to said terminal block means, said block means including electrical connections series connecting said center conductor and sheath together, said electrical switch being connected in series with one of said center conductor and sheath, the remaining end of the series circuit of said cable and switch being adapted to be connected into an alarm system.
Claim 6
Dependent Claim
41 words
The device of claim 4 in which said element is a rod having a diametral opening therethrough which receives said cable, said frame having stud elements thereon adapted to be secured to said one gate member by means of threaded connectors.
Claim 7
Dependent Claim
38 words
The device of claim 4 in which the operating member of said switch is a plunger, the end of said rod engaging and depressing said plunger to close said switch when said switch-operating element is in said position.
Claim 8
Dependent Claim
100 words
The device of claim 6 including in combination said two gate members mounted to be moved relative to each other from a closed juxtaposed position, said frame being in the form of an elongated closure open at one end to receive said element, said switch being mounted and enclosed in the other end of said frame, said frame being fixedly secured to said one gate member, said terminal block means also being fixedly secured to said one gate member and including a terminal device providing said electrical connections and a protective housing therefor which guards access to said electrical connections.
References Cited (Backward Citations)
US3714644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |