US3330922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burglar alarm systems
Assignee: Individual
•
Filing: 1965-02-11
•
Granted: 1967-07-11
•
Expires: 1985-02-11
Abstract
No abstract record available.
Inventors
- 👤 Robert E Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:53
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A SWITCHING SYSTEM IN A BURGLAR ALARM SYSTEM FOR SIGNALING OPENING MOVEMENT OF A ROLL-CURTAIN DOOR OR THE LIKE UPON OPENING OR CLOSING AN ELECTRICAL CIRCUIT IN RESPONSE TO GIVEN ROTATIONAL MOVEMENT OF THE ROLL-CURTAIN DOOR SHAFT, COMPRISING; A THREADED, MEMBER HAVING INTERNAL THREADS THAT ARE CAPABLE OF BEING ROTATED BY SAID SHAFT, A FOLLOWER MEMBER HAVING EXTERNAL THREADS THAT IS MOUNTED ON SAID THREADED MEMBER, MEANS FOR PREVENTING ROTATION OF SAID FOLLOWER MEMBER AROUND SAID THREADED MEMBER, AND SWITCH MEANS IN SAID ELECTRICAL CIRCUIT BEING POSITIONED ADJACENT SAID THREADED MEMBER FOR BEING ACTUATED THROUGH CONTACT WITH SAID FOLLOWER MEMBER.
Claim 2
Dependent Claim
100 words
A SWITCHING SYSTEM IN A BURGLAR ALARM SYSTEM FOR SIGNALING OPENING MOVEMENT OF A ROLL-CURTAIN DOOR OR THE LIKE UPON OPENING OR CLOSING AN ELECTRICAL CIRCUIT IN RESPONSE TO GIVEN ROTATIONAL MOVEMENT OF THE ROLL-CURTAIN DOOR SHAFT, COMPRISING; A THREADED, MEMBER HAVING INTERNAL THREADS THAT ARE CAPABLE OF BEING ROTATED BY SAID SHAFT, A FOLLOWER MEMBER HAVING EXTERNAL THREADS THAT IS MOUNTED ON SAID THREADED MEMBER, MEANS FOR PREVENTING ROTATION OF SAID FOLLOWER MEMBER AROUND SAID THREADED MEMBER, AND SWITCH MEANS IN SAID ELECTRICAL CIRCUIT BEING POSITIONED ADJACENT SAID THREADED MEMBER FOR BEING ACTUATED THROUGH CONTACT WITH SAID FOLLOWER MEMBER.
References Cited (Backward Citations)
US2152450A
Cited
US3175418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |