US4015250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm for removal of a fire extinguisher
Assignee: LARSEN S Manufacturing Co
•
Filing: 1975-09-02
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Granted: 1977-03-29
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Expires: 1995-09-02
Abstract
Abstract A source of electrical energy, a normally closed momentary contact switch, and an electrically energizable warning device are connected in a series circuit and mounted with respect to a fire extinguisher mount such as a cabinet or bracket so that the switch is held open when the extinguisher is fully installed in the mount, but is allowed to close as an incident to removal of the extinguisher from the mount, as by opening the cabinet door. A manually operable switch may be added for disabling the normal circuit operation when desired. The circuitry may be contained in a housing hingedly connected to the mount, to facilitate servicing the circuit without removing the extinguisher.
Inventors
- 👤 William L. Fudge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:34
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/08; G08B13/14; G08B13/1472
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
In combination: a fire extinguisher mount comprising a first cabinet for containing said fire extinguisher, having a door to be opened to gain access thereto; an electric module including a second cabinet, a source of electrical energy, an electrically energizable alarm device, and switch means for controlling energization of said device from said source; and hinge means positioning said second cabinet within said first cabinet so that said switch means prevents energization of said device when said door is closed, but acts, as an incident to opening of said door, to cause energization of said device.
Claim 2
Dependent Claim
96 words
In combination: a fire extinguisher mount comprising a first cabinet for containing said fire extinguisher, having a door to be opened to gain access thereto; an electric module including a second cabinet, a source of electrical energy, an electrically energizable alarm device, and switch means for controlling energization of said device from said source; and hinge means positioning said second cabinet within said first cabinet so that said switch means prevents energization of said device when said door is closed, but acts, as an incident to opening of said door, to cause energization of said device.
Claim 3
Dependent Claim
33 words
The structure of claim 1 wherein said second cabinet may be pivoted on the hinge of said positioning means to enable servicing of said module without removing said module from said first cabinet.
Claim 4
Dependent Claim
79 words
In combination: an outer cabinet having a door; an inner cabinet having an open bottom and containing an element replaceable through said bottom; a switch actuator extending out of said inner cabinet; and means hingedly mounting said inner cabinet within said outer cabinet for pivotal movement between a first position, in which said actuator engages the inside of said door and said bottom engages said outer cabinet, and a second position in which said element is accessible for replacement.
Claim 5
Dependent Claim
79 words
In combination: an outer cabinet having a door; an inner cabinet having an open bottom and containing an element replaceable through said bottom; a switch actuator extending out of said inner cabinet; and means hingedly mounting said inner cabinet within said outer cabinet for pivotal movement between a first position, in which said actuator engages the inside of said door and said bottom engages said outer cabinet, and a second position in which said element is accessible for replacement.
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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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |