Patent US3820114A successfully refreshed from Google Patents.
US3820114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing device
Assignee: Securicor Granley Systems Ltd
•
Filing: 1972-10-04
•
Granted: 1974-06-25
•
Expires: 1992-10-04
Abstract
Abstract This invention is a testing device for a transmitting/receiving system for detecting movement due, for example, to an intruder or a fire, and is arranged to be automatically operated when the main system is switched on to perform a test that the transmitter and receiver are operating correctly by applying a test signal to be transmitted and by detecting whether the test signal is received at a distant location and also by testing that the test signal applied directly to the receiver gives an alarm signal.
Inventors
- 👤 R Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:53
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
164 words
In a transmitting and receiving system for detecting moving objects, the system including a receiver and a detector coupled to the receiver for detecting a signal received by the receiver indicative of a moving object and for providing a detector logic signal in response to receipt by the receiver of a signal indicative of a moving object, the improvement of a testing device comprising: a. a transmitter, b. means for supplying a test signal for transmission by the transmitter, c. means for coupling to the receiver of the detecting system a portion of the test signal transmitted by the transmitter, d. at least one distant receiver means for providing a distant receiver logic signal upon receiving the test signal, and e. means for detecting whether the test signal is received by the distant receiver means and whether the detector of the detecting system is providing a detector logic signal in response to receipt of the test signal by the receiver of the detecting system.
Claim 2
Dependent Claim
164 words
In a transmitting and receiving system for detecting moving objects, the system including a receiver and a detector coupled to the receiver for detecting a signal received by the receiver indicative of a moving object and for providing a detector logic signal in response to receipt by the receiver of a signal indicative of a moving object, the improvement of a testing device comprising: a. a transmitter, b. means for supplying a test signal for transmission by the transmitter, c. means for coupling to the receiver of the detecting system a portion of the test signal transmitted by the transmitter, d. at least one distant receiver means for providing a distant receiver logic signal upon receiving the test signal, and e. means for detecting whether the test signal is received by the distant receiver means and whether the detector of the detecting system is providing a detector logic signal in response to receipt of the test signal by the receiver of the detecting system.
Claim 3
Dependent Claim
18 words
The improvement of claim 1, wherein the means for supplying a test signal operates for a short interval.
Claim 4
Dependent Claim
22 words
The improvement of claim 1, wherein the means for supplying a test signal operates automatically when the detecting system is switched on.
Claim 5
Dependent Claim
35 words
The improvement of claim 1, wherein the detecting means includes an AND device arranged to receive the detector logic signal and the distant receiver logic signal for controlling initiation of operation of the detecting system.
Claim 6
Dependent Claim
16 words
The improvement of claim 1, wherein the test signal is a simulation of a Doppler signal.
Claim 7
Dependent Claim
25 words
The improvement of claim 1, wherein the transmitter is a transmitter for the detecting system and is used during normal operation of the detecting system.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |