US4683459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm system test annunciator
Assignee: ADT Diversified Services Inc
•
Filing: 1985-05-28
•
Granted: 1987-07-28
•
Expires: 2005-05-28
Abstract
Abstract Test apparatus for a wireless system is provided in which an audible annunciation is produced which is an accurate indication of the measured received signal strength. A signal is derived from the receiver which is representative of the signal strength and which is employed to activate a speech synthesizer which provides annuciation of each of a range of digits, each digit annunication representing a predetermined increment of received signal strength.
Inventors
- 👤 James B. Edson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:26
CPC Classifications
G; G08; G08B; G08B29/00; G08B29/12; G08B29/14; G08B23/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
For use in a wireless alarm system having one or more transmitters each providing a coded transmitted signal representing status and alarm conditions, and a receiver for receiving each of the transmitted signals, test apparatus comprising: first means operative in response to a signal from the receiver which is representative of signal strength to provide a first signal; second means for providing a digital signal representative of the first signal; speech synthesizer means; means for providing the digital signal to the synthesizer means to cause the provision of an audio output signal representing a digit corresponding to the signal strength represented by the digital signal, said means for providing the digital signal being responsive to said coded transmitted signal; and output means operative in response to the audio output signal to provide verbal annunciation of the digit represented by the audio output signal.
Claim 2
Dependent Claim
143 words
For use in a wireless alarm system having one or more transmitters each providing a coded transmitted signal representing status and alarm conditions, and a receiver for receiving each of the transmitted signals, test apparatus comprising: first means operative in response to a signal from the receiver which is representative of signal strength to provide a first signal; second means for providing a digital signal representative of the first signal; speech synthesizer means; means for providing the digital signal to the synthesizer means to cause the provision of an audio output signal representing a digit corresponding to the signal strength represented by the digital signal, said means for providing the digital signal being responsive to said coded transmitted signal; and output means operative in response to the audio output signal to provide verbal annunciation of the digit represented by the audio output signal.
Claim 3
Dependent Claim
31 words
The invention of claim 1 wherein the synthesizer means includes means for providing an enable signal to the synthesizer means upon detection of a valid address code in the transmitted signal.
Claim 4
Dependent Claim
46 words
The invention of claim 1 wherein the transmitted signal includes a start code and data codes; and wherein the first means includes: means for providing signal strength data to the second means; and means operative to enable the second means upon detection of the start code.
Claim 5
Dependent Claim
29 words
The invention of claim 3 wherein the second means includes an analog to digital converter providing a multiple bit output signal as an address input to the synthesizer means.
Claim 6
Dependent Claim
35 words
The invention of claim 4 wherein the transmitted signals are encoded by tone bursts of first and second frequency and including a sync burst of a duration longer than the duration of the data bursts.
Claim 7
Dependent Claim
43 words
The invention of claim 5 wherein the first means includes: integrator means having a slow charge and a fast discharge rate and operative to detect the relatively long sync burst and to provide an output pulse representative thereof for enabling the converter means.
Claim 8
Dependent Claim
20 words
The invention of claim 6 wherein the output means includes an audio amplifier and loudspeaker for producing the verbal annunciation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |