US681637A - Explosive fire-alarm. - Google Patents

Explosive fire-alarm. Download PDF

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Publication number
US681637A
US681637A US3915100A US1900039151A US681637A US 681637 A US681637 A US 681637A US 3915100 A US3915100 A US 3915100A US 1900039151 A US1900039151 A US 1900039151A US 681637 A US681637 A US 681637A
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Prior art keywords
spring
fire
plunger
alarm
button
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Expired - Lifetime
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US3915100A
Inventor
Sherman C Guthrie
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H W GUTHRIE
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H W GUTHRIE
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Priority to US3915100A priority Critical patent/US681637A/en
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Publication of US681637A publication Critical patent/US681637A/en
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/74Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/764Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet
    • H01H37/765Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet using a sliding contact between a metallic cylindrical housing and a central electrode

Description

No. 681,637. Patented Aug. 27,19m. s. c. aumms.
EXPLOSIVE FIRE ALARI.
(Applimfion fllld D00. 8, 1800.)
(Ilo Model.)
1 I I (/Z7/ uAfim'geys UNITED STATES PATENT OFFICE.
SHERMAN O. GUTHRIE, OF FINDLAY, OHIO, ASSIGNOR OF ONE-HALF TO H. W. GUTHRIE, OF ELMORE, OHIO.
'EXPLOSIVE FIRE-ALARM.
SPECIFICATION forming part of Letters Patent No. 681,637, dated August 27, 1901. Application filed December 8, 1900. Serial No. 39,151. (No model.)
To all whom it may concern:
Be it known that I, SHERMAN C. GUTHRIE, a citizen of the United States, residing at Findlay, in the county of Hancock and State of Ohio, have invented a new and useful attachment for electric call-bells as an alarm in case of fire in places where such call-bells are used and to be operated by an explosive; and I do declare that the following is a full, clear, and exact description of the invention.
The invention relates to improvements in explosive fire-alarms.
The object of the presentinvention is to improve the construction of fire-alarms of that class which in event of a fire will automatically close the circuit and ring a bell and to provide a simple and inexpensive device of this character designed to be used in connec tion with a call-bell and adapted to be readily mounted adjacent to a push-button and capable of automatically engaging the same and of soundinga continuous alarm in event of a fire.
The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended.
'In the drawings, Figure 1 is a perspective view of a fire-alarm constructed in accordance with this invention, the casing being broken away to illustrate the interior mechanism. Fig. 2 is a vertical sectional View of the same.-
Like numerals of reference designate corresponding parts in both figures of the drawings.
1 designates a metallic box or casing designed to be secured to a wall directly in front of a push-button 2 and provided with a plunger 3, adapted to be actuated by a spring at in event of a fire, as hereinafter explained.
The plunger is mounted in a suitable guide or way, preferably composed or bars or cleats 4 and cross-pieces 5 and 6, and these parts the bars or cleats and the cross-piecesals0 form a support for abomb and are mounted on a shelf 7, arranged within the casing.
The plunger 3 is adapted to reciprocate longitudinally and is located directly in line with the push-button, and it is also connected with the rod 8, extending through the outer wall of the casing and terminating in a suitable head or button and adapted to be pushed inward by hand to operate the push-button and ring the call-bell. The plunger extends to the push-button 2, which is spring-actuated, and the spring thereof is adapted to force the plunger outward after the latter has been operated by hand. The spring, which is adapted to actuate the plunger, is secured at its lower end to the bottom of the casing by a screw or other suitable fastening device, and it is provided at its upper end with an arm or extension 9, projecting above the outer end of the plunger and adapted to be engaged by a setting-bar 10, which is interposed between the bar 6 and the upper free end of the spring and which is adapted to hold the same in a flexed condition, as illustrated in Fig. l of the drawings. The setting-bar 10 is supported upon the small bomb 11, which is provided with suitable fuses 12, extending through perforations 13 and 14: of the support and the casing and adapted to be arranged in different portions of a room and to be ignited by a fire therein. In event of a fire the fuses will be ignited and the bomb exploded, which explosion will throw the setting-bar out of engagement with the spring and release the latter. The spring will reciprocate the plunger and depress the pushbutton, and thereby ring a continuous alarm.
What I claim is- 1. In a device of the class described the combination of a casing provided with a suitable guide or way, a reciprocating plunger mounted in the guide or wayand adapted to engage and depress a push-button, a spring arranged to engage the plunger, and a settingbar holding the spring against movement and adapted to rest upon abomb and to be thrown by the same out of engagement with the spring, substantially as described.
2. In a device of the class described the combination of a casing designed to be mounted over a push-button and provided with a guide or way, a plunger mounted in the guide or way, a spring arranged to engage the plunger, a setting-bar holding the spring against movement, a bomb for throwing the settingbar out of engagement with the spring, and
10 or way, a spring arranged to engage the plunger and secured at one end, asetting-bar engaging the other end of the spring to hold the latter against movement, and a bomb for throwing the setting-bar out of engagement with the spring, substantially as described.
SHERMAN O. GUTHRIE.
Witnesses:
JNo. SHERIDAN, OHAs. T. WEED.
US3915100A 1900-12-08 1900-12-08 Explosive fire-alarm. Expired - Lifetime US681637A (en)

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US3915100A US681637A (en) 1900-12-08 1900-12-08 Explosive fire-alarm.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463745A (en) * 1946-11-06 1949-03-08 Colardo John Alarm for fire detection
US2725822A (en) * 1952-03-29 1955-12-06 Hercules Powder Co Ltd Switch and method for blasting
US2745926A (en) * 1951-07-28 1956-05-15 Vernon P Mullally Fire alarm apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463745A (en) * 1946-11-06 1949-03-08 Colardo John Alarm for fire detection
US2745926A (en) * 1951-07-28 1956-05-15 Vernon P Mullally Fire alarm apparatus
US2725822A (en) * 1952-03-29 1955-12-06 Hercules Powder Co Ltd Switch and method for blasting

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