US3774193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Watchman{40 s tour alarm system
Assignee: Individual
•
Filing: 1972-08-24
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Granted: 1973-11-20
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Expires: 1992-08-24
Abstract
Abstract An alarm system establishes, according to a preset program, the order and the minimum time schedule to be followed by a watchman in checking control stations on his vigilance rounds. The watchman carries a portable control assembly which must be plugged into each fixed control station in the proper order and after the elapse of a minimum time before the portable control assembly will shift to correspond to the next fixed control station. If the entire round is not completed and the portable control assembly plugged into a main control station within a predetermined time, an alarm will be triggered.
Inventors
- 👤 T Restrepo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:20
CPC Classifications
G; G07; G07C; G07C1/00; G07C1/20; G07C9/00; G07C9/20; G07C9/29
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
An alarm apparatus in accordance with claim 1, wherein said portable control means further includes: advancing means for determining if said electrical reference sample and said comparison element being compared thereto are a match and advancing said comparison elements only after a match has been determined, said match being a positive comparison.
Claim 2
Dependent Claim
25 words
conveying to a first comparison station a portable signal giving means for providing said proper signal only when a program of comparisons have been completed;
Claim 3
Dependent Claim
46 words
An alarm apparatus in accordance with claim 2, wherein said portable control means further includes: a timing means having at least one timing element therein for preventing said advancing means from functioning until a minimum amount of time as determined by said timing element has elapsed.
Claim 4
Dependent Claim
32 words
connecting said portable signal giving means to said first comparison station and if there is a positive comparison, automatically advancing said signal giving means to the second in said program oF comparisons;
Claim 5
Dependent Claim
49 words
An alarm apparatus in accordance with claim 3 wherein: said timing means includes a number of said timing elements equal to the number of said fixed control means plus one more representing the minimum time between the final one of said fixed control means and said central control means.
Claim 6
Dependent Claim
31 words
conveying connecting said portable signal giving means to each subsequent comparison station and advancing said signal giving means through the entire program of comparisons, thereby completing said program of comparisons; and
Claim 7
Dependent Claim
23 words
An alarm apparatus in accordance with claim 3 wherein: said portable control means further includes a switch means for disconnecting said timing means.
Claim 8
Dependent Claim
28 words
conveying and connecting said signal giving means to said central control system and providing said proper signal thereto thereby interrupting the running of said predetermined period of time.
Claim 9
Dependent Claim
64 words
An alarm apparatus in accordance with claim 1, wherein: said fixed control means each comprise a resistor and capacitor pair of a predetermined electrical reactance; said comparison elements each comprise a resistor and capacitor pair of a predetermined electrical reactance; and said portable control means compares the reactances of said fixed control means and said comparison elements by means of a Wheatstone bridge circuit.
Claim 10
Dependent Claim
65 words
An alarm apparatus in accordance with claim 1 wherein: said fixed control means further includes a socket means attached thereto for receiving a plug and for electrically connecting said plug with said electrical reference sample; and said portable control means further includes a plug means attached thereto for insertion into said socket means to electrically connect said portable control means with said fixed control means.
Claim 11
Dependent Claim
74 words
An alarm apparatus in accordance with claim 1 wherein, in said central control means: said alarm means comprises at least one alarm light and alarm timing means for triggering a second general alarm means if said proper signal is not fed into said central control means within a time period as determined by said alarm timing means wherein said alarm timing means is activated upon triggering of said alarm by said central control means.
Claim 12
Independent Claim
10 words
A method of protecting an area, comprising the steps of:
References Cited (Backward Citations)
US3579221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |