US3257653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm system
Assignee: WELLS BENRUS CORP
•
Filing: 1963-06-21
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Granted: 1966-06-21
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Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Mccorkindale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:43
CPC Classifications
G; G08; G08B; G08B29/00; G08B29/18; G08B29/20; G08B29/24; G08B19/00; G08B19/005; G08B23/00; G08B25/00; G08B25/01; G08B25/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
AN ALARM SYSTEM COMPRISING A SENSOR, A SIGNAL SENDING MEANS OPERATIVELY CONNECTED TO SAID SENSOR SO AS TO BE ACTUATED THEREBY AND EFFECTIVE, WHEN ACTUATED, TO SEND OUT A SIGNAL COMPRISING A HIGH FREQUENCY CARRIER SIGNAL IMPRESSED WITH A PREDETERMINED MODULATION, AND SIGNAL RECEIVING MEANS INCLUDING MEANS EFFECTIVE TO SENSE THE RECEPTION OF SAID MODULATION SIGNAL, ALARM MEANS, SIGNAL AMPLITUDE LIMITER MEANS CONNECTED TO SAID SENSING MEANS TO LIMIT SAID RECEIVED MODULATION SIGNAL TO A PREDETERMINED AMPLITUDE, AND A TIME DELAY MEANS CONNECTED TO SAID LIMITER MEANS TO PERMIT ACTUATION OF SAID ALARM ONLY AFTER RECEPTION OF SAID SIGNAL MODUALTION, IRRESPECTIVE OF ITS AMPLITUDE OVER A PREDETERMINED MINIMUM, HAS BEEN EFFEIVE FOR A PREDETERMINED PERIOD OF TIME WITHOUT ANY INTERRUPTION THEREOF FOR ANY PERIOD GREATER THAN A TIME ON THE ORDER OF MILLISECONDS.
Claim 2
Dependent Claim
133 words
AN ALARM SYSTEM COMPRISING A SENSOR, A SIGNAL SENDING MEANS OPERATIVELY CONNECTED TO SAID SENSOR SO AS TO BE ACTUATED THEREBY AND EFFECTIVE, WHEN ACTUATED, TO SEND OUT A SIGNAL COMPRISING A HIGH FREQUENCY CARRIER SIGNAL IMPRESSED WITH A PREDETERMINED MODULATION, AND SIGNAL RECEIVING MEANS INCLUDING MEANS EFFECTIVE TO SENSE THE RECEPTION OF SAID MODULATION SIGNAL, ALARM MEANS, SIGNAL AMPLITUDE LIMITER MEANS CONNECTED TO SAID SENSING MEANS TO LIMIT SAID RECEIVED MODULATION SIGNAL TO A PREDETERMINED AMPLITUDE, AND A TIME DELAY MEANS CONNECTED TO SAID LIMITER MEANS TO PERMIT ACTUATION OF SAID ALARM ONLY AFTER RECEPTION OF SAID SIGNAL MODUALTION, IRRESPECTIVE OF ITS AMPLITUDE OVER A PREDETERMINED MINIMUM, HAS BEEN EFFEIVE FOR A PREDETERMINED PERIOD OF TIME WITHOUT ANY INTERRUPTION THEREOF FOR ANY PERIOD GREATER THAN A TIME ON THE ORDER OF MILLISECONDS.
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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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |