Patent US3790944A successfully refreshed from Google Patents.
US3790944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burglar alarm system
Assignee: Individual
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Filing: 1972-07-10
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Granted: 1974-02-05
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Expires: 1992-07-10
Abstract
Abstract A single battery powered burglar alarm system for building having an alarm and the battery positioned within a locked box and a plurality of sensor switch elements located externally of the box at strategic locations around the building. The electrical circuit is normally open, but once it is closed for actuation of the alarm by closing of any one of the sensor switch elements the alarm cannot be stopped except by access to the locked box.
Inventors
- 👤 P Yarwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:51
CPC Classifications
G; G08; G08B; G08B19/00; G08B13/00; G08B13/02; G08B13/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
An alarm system for sensing the opening of doors and windows in a building comprising a locked box located in the interior of the building, said locked box having therein a battery, an alarm signal, a solenoid, a three-way switch operable by the solenoid only in one direction and manually in the other direction, and electrical wiring joining those devices in a circuit, and sensing switches located adjacent the doors and windows of the building and externally of the locked box, said sensing switches being normally open when the doors and windows are closed and arranged to close when the doors and windows are opened, and said sensing switches having lead wires entering the locked box and arranged upon closing of one or more sensing switches to energize the solenoid which actuates the three-way switch and thereupon sounds the alarm signal, and said signal continues to sound until the three-way switch is manually returned to its initial position.
Claim 2
Dependent Claim
158 words
An alarm system for sensing the opening of doors and windows in a building comprising a locked box located in the interior of the building, said locked box having therein a battery, an alarm signal, a solenoid, a three-way switch operable by the solenoid only in one direction and manually in the other direction, and electrical wiring joining those devices in a circuit, and sensing switches located adjacent the doors and windows of the building and externally of the locked box, said sensing switches being normally open when the doors and windows are closed and arranged to close when the doors and windows are opened, and said sensing switches having lead wires entering the locked box and arranged upon closing of one or more sensing switches to energize the solenoid which actuates the three-way switch and thereupon sounds the alarm signal, and said signal continues to sound until the three-way switch is manually returned to its initial position.
Claim 3
Dependent Claim
236 words
An alarm system for sensing the opening of doors and windows in a building comprising a locked box located in the interior of the building, said locked box having therewithin a battery, an alarm signal, a solenoid, a three-way switch operable by the solenoid only in one direction and manually in the other direction, and electrical wiring joining those devices in a circuit, said three-way switch interposed in said circuit between the battery and the alarm signal, said three-way switch in one position thereof failing to complete the circuit from the battery to the alarm signal and in another position thereof completing the circuit from the battery to the alarm signal, and a plurality of sensing switches wired in parallel with each other, one of said sensing switches located adjacent each door and each window of the building and externally of the locked box, said sensing switches being normally open when the doors and windows are closed and arranged to close when the doors and windows are opened, and said sensing switches having lead wires entering the locked box and arranged upon closing of one or more sensing switches to energize the solenoid which actuates the three-way switch and moves it to the position thereof which completes the circuit to the alarm signal and thereupon sounds the alarm signal, and said signal continues to sound until the three-way switch is manually returned to its initial position.
Claim 4
Dependent Claim
236 words
An alarm system for sensing the opening of doors and windows in a building comprising a locked box located in the interior of the building, said locked box having therewithin a battery, an alarm signal, a solenoid, a three-way switch operable by the solenoid only in one direction and manually in the other direction, and electrical wiring joining those devices in a circuit, said three-way switch interposed in said circuit between the battery and the alarm signal, said three-way switch in one position thereof failing to complete the circuit from the battery to the alarm signal and in another position thereof completing the circuit from the battery to the alarm signal, and a plurality of sensing switches wired in parallel with each other, one of said sensing switches located adjacent each door and each window of the building and externally of the locked box, said sensing switches being normally open when the doors and windows are closed and arranged to close when the doors and windows are opened, and said sensing switches having lead wires entering the locked box and arranged upon closing of one or more sensing switches to energize the solenoid which actuates the three-way switch and moves it to the position thereof which completes the circuit to the alarm signal and thereupon sounds the alarm signal, and said signal continues to sound until the three-way switch is manually returned to its initial position.
Claim 5
Dependent Claim
199 words
An alarm system for sensing the opening of doors and windows in a building comprising a locked box located inside the building, said locked box having therein a battery, an alarm signal, a solenoid, a three-way switch operable by the solenoid only in one direction and manually in the other direction, and electrical wiring joining those devices in a circuit, and a plurality of sensing switches wired in parallel with each other, one of said sensing switches located adjacent each door and each window of the building and externally of the locked box, said sensing switches being normally open when the doors and windows are closed and arranged to close whEn the doors and windows are opened, and said sensing switches having a pair of lead wires entering the locked box, manually operable on and off switch means arranged in series with one of said lead wires, and arranged when one or more of said sensing switches is closed and the manually operable switch means is on the solenoid which actuates the three-way switch is energized and thereupon sounds the alarm signal, and said signal continues to sound until the three-way switch is manually returned to its initial position.
Claim 6
Dependent Claim
199 words
An alarm system for sensing the opening of doors and windows in a building comprising a locked box located inside the building, said locked box having therein a battery, an alarm signal, a solenoid, a three-way switch operable by the solenoid only in one direction and manually in the other direction, and electrical wiring joining those devices in a circuit, and a plurality of sensing switches wired in parallel with each other, one of said sensing switches located adjacent each door and each window of the building and externally of the locked box, said sensing switches being normally open when the doors and windows are closed and arranged to close whEn the doors and windows are opened, and said sensing switches having a pair of lead wires entering the locked box, manually operable on and off switch means arranged in series with one of said lead wires, and arranged when one or more of said sensing switches is closed and the manually operable switch means is on the solenoid which actuates the three-way switch is energized and thereupon sounds the alarm signal, and said signal continues to sound until the three-way switch is manually returned to its initial position.
Claim 7
Dependent Claim
49 words
A device as set forth in claim 3 in which said manually operable on and off switch means comprises a pair of switches in parallel with each other, one of said switches located on the inside of the building and the other located on the outside of the building.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |