US1705227A - Fire-alarm system - Google Patents

Fire-alarm system Download PDF

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Publication number
US1705227A
US1705227A US254762A US25476228A US1705227A US 1705227 A US1705227 A US 1705227A US 254762 A US254762 A US 254762A US 25476228 A US25476228 A US 25476228A US 1705227 A US1705227 A US 1705227A
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bars
base
fire
circuit
alarm system
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US254762A
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Daniel F Quigley
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00Measuring temperature based on the expansion or contraction of a material
    • G01K5/48Measuring temperature based on the expansion or contraction of a material the material being a solid
    • G01K5/56Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid
    • G01K5/62Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid the solid body being formed of compounded strips or plates, e.g. bimetallic strip

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  • This invention relates to fire alarm systems and more particularly to a circuit closing element for an electrical alarmsystem.
  • An important object ofthe mvention is to provide a device of this character which may be very readily and cheaply .produced and is readily installed and whlch, when 1nstalled, will have more or less the appearance of an ordinary electric light globe, so
  • a further object of the invention is to provide a switch element for electrlcally operated fire alarm systems having means auginenting dangerous increases o f temperature to insure a promptand immediate operation of the alarm and rapid closing of the switch.
  • a further object of the invention 1s to produce a device of this character .whlch may be housed so that it is normally hidden from view and in which the construction 1s such thatl the housingf'may be made of readlly inflammable material, so that 1n event of lcontact of flame therewith, this coyer -w1ll act as an agent, promoting the rapidity of closure of the switch. l
  • Figure 2 is a longitudinal -sectlonal view through the circuit closer
  • Figure 3 is a section on the llne 3-3 of Figure 2.
  • the numeral 10 generally designates a base of insulation having extended therefrom at one side a pair of bars 11 which, when subjected to variations in/temperature, fiex, and when heated, approach one another. Carried by the outer en s of these bars are contact elements 12l which are adjustably mounted in the bars, as indicated at 13, so that the extent through which the bars must flex may be adjusted. These bars referably have their inner ends reduced an extended through the material of the base, so that they project and form the contact tongues 14 for engagement with an ordinary connection socket 15.
  • the outer face of the base or that face from which the bars 11 project is provided ⁇ with means for mounting fuses or matches 16, there preferably being three matches, one arranged between the bars and the others arrangedvat the outer faces thereof. These matches are in close proximity to the bars, so that when burning, the heat thereof will be readily transmitted to the bars.
  • the base 10 forms a means for supporting a cover 17 housing the bars 11 and matches 16.
  • This cover is perforated, asindicated at 18, to permit ready circulation of. air therethrough and is preferably formed of some readily inflammable material, such as cellu-v loid.
  • the circuit may be installed employing the ordinary plug fixtures and that the devices, when applied thereto, will have substantially the appearance of an electric lightglobe. W'hen Sub'- jected to intense heat, this heat vn'll cause flexing of the bars l() and closure of the circuit. In miany instances, particularl where direct contact of flame occurs, the ses or matches 16 and cover 17 will become ignited, generating an intense heatfwhich willcause the action of the bars to be substantially instautaneous.
  • a switch element for electrical fire alarm systems comprising a base having thermo-metallic barsl adapted to' be connected in the circuit of the fire alarm and provided with contact elements engaging when the bars are heated, andmeans asso-- .ciated with said base and operative under extreme temperatures for producing flame in direct contact with said bars.
  • a switch element vfor electrical re alarm systems comprising a base having thermmetallic bars adapted to be connected in the circuit of the fire alarm and provided with contact elements engaging when the bars are heated, and means associated with said base and operative under extreme temperatures for producing flame in direct Contact with said bars comprising matches carried by said base and substan- ⁇ tially paralleling the bars.
  • a switch element for, electrical fire alarm systems comprising a base having thermo-metallic bars adapted to be con- 'nectecl in the circuit of the fire alarm and provided with contact elements engaging when the bars are heated, ⁇ and means associated with said baise and operative under extreme temperature :for producing flame in direct Contact with said bers comprising en inflammable cover carried by the base and surrounding and concealingsnid bars.
  • alarm systems comprising a. base having thermo-metallic bars adapted -to be connected in the circuit of Jche fire alarm and provided 'with Contact elements engaging when the bars are heat'ed, and 'Ineens4 associated with said base and operative under extreme temperatures 'for producing flame in direct Contact with said bars, theends of said bars being extended through the base to form tongues for engagement in a plug fixture.
  • a switch element for electrical fire, alarm systems including a base, a thermometallic bar Acarried 'thereby and -flexing when heated to elecei'ically engage n Contact, and means associated with 'said base and operative under extreme temperatures for roducing ame in direct Contact with said In testimony whereof I hereunto affix my till n oUiGLnYr signature.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)

Description

March 12, 1929.
D. F. QUIGLEY 1,705,227
FIRE ALARM SYSTEM Filed Feb 16, 1928 frnz- Patented Mar. 12, 1929.
UNITED STA-TES DANIEL F. QUIGLEY, F BANGOR, MAINE.
FIRE-ALA SYSTEM.
Application led February 16, 1928. Serial No. 254,732.
This invention relates to fire alarm systems and more particularly to a circuit closing element for an electrical alarmsystem. An important object ofthe mventionis to provide a device of this character which may be very readily and cheaply .produced and is readily installed and whlch, when 1nstalled, will have more or less the appearance of an ordinary electric light globe, so
that it is not unsightly in appearance. a
A further object of the invention is to provide a switch element for electrlcally operated fire alarm systems having means auginenting dangerous increases o f temperature to insure a promptand immediate operation of the alarm and rapid closing of the switch.
A further object of the invention 1s to produce a device of this character .whlch may be housed so that it is normally hidden from view and in which the construction 1s such thatl the housingf'may be made of readlly inflammable material, so that 1n event of lcontact of flame therewith, this coyer -w1ll act as an agent, promoting the rapidity of closure of the switch. l
These and other/objects I attain by .the construction shown in the accompanying drawing, wherein for the purpose of lllustration is yshown a preferred embodiment of my invention and wherein 'Figure 1 is a side elevatlon of a c1rcu1t closer for automatic electrical fire alarms constructed in accordance with my invention, the-cover being shown in section;
Figure 2 is a longitudinal -sectlonal view through the circuit closer;
Figure 3 is a section on the llne 3-3 of Figure 2.
Referring now more particularly -to the drawing, the numeral 10 generally designates a base of insulation having extended therefrom at one side a pair of bars 11 which, when subjected to variations in/temperature, fiex, and when heated, approach one another. Carried by the outer en s of these bars are contact elements 12l which are adjustably mounted in the bars, as indicated at 13, so that the extent through which the bars must flex may be adjusted. These bars referably have their inner ends reduced an extended through the material of the base, so that they project and form the contact tongues 14 for engagement with an ordinary connection socket 15.
The outer face of the base or that face from which the bars 11 project is provided `with means for mounting fuses or matches 16, there preferably being three matches, one arranged between the bars and the others arrangedvat the outer faces thereof. These matches are in close proximity to the bars, so that when burning, the heat thereof will be readily transmitted to the bars.
The base 10 forms a means for supporting a cover 17 housing the bars 11 and matches 16. This cover is perforated, asindicated at 18, to permit ready circulation of. air therethrough and is preferably formed of some readily inflammable material, such as cellu-v loid. It will be obvious that the circuit may be installed employing the ordinary plug fixtures and that the devices, when applied thereto, will have substantially the appearance of an electric lightglobe. W'hen Sub'- jected to intense heat, this heat vn'll cause flexing of the bars l() and closure of the circuit. In miany instances, particularl where direct contact of flame occurs, the ses or matches 16 and cover 17 will become ignited, generating an intense heatfwhich willcause the action of the bars to be substantially instautaneous.
Since the construction hereinbefore ,set forth is ca able of a certain range of change and modi cation without materiall departing from the spirit of the invention, I do not limit myself to such specific structure except as hereinafter claimed.
I claim 1. A switch element for electrical fire alarm systems comprising a base having thermo-metallic barsl adapted to' be connected in the circuit of the fire alarm and provided with contact elements engaging when the bars are heated, andmeans asso-- .ciated with said base and operative under extreme temperatures for producing flame in direct contact with said bars.
2. A switch element vfor electrical re alarm systems comprising a base having thermmetallic bars adapted to be connected in the circuit of the fire alarm and provided with contact elements engaging when the bars are heated, and means associated with said base and operative under extreme temperatures for producing flame in direct Contact with said bars comprising matches carried by said base and substan-` tially paralleling the bars.
3. A switch element for, electrical lire alarm systems comprising a base having thermo-metallic bars adapted to be con- 'nectecl in the circuit of the fire alarm and provided with contact elements engaging when the bars are heated,` and means associated with said baise and operative under extreme temperature :for producing flame in direct Contact with said bers comprising en inflammable cover carried by the base and surrounding and concealingsnid bars.
alarm systems comprising a. base having thermo-metallic bars adapted -to be connected in the circuit of Jche fire alarm and provided 'with Contact elements engaging when the bars are heat'ed, and 'Ineens4 associated with said base and operative under extreme temperatures 'for producing flame in direct Contact with said bars, theends of said bars being extended through the base to form tongues for engagement in a plug fixture.
6. A switch element for electrical lire, alarm systems including a base, a thermometallic bar Acarried 'thereby and -flexing when heated to elecei'ically engage n Contact, and means associated with 'said base and operative under extreme temperatures for roducing ame in direct Contact with said In testimony whereof I hereunto affix my nennen n oUiGLnYr signature.
US254762A 1928-02-16 1928-02-16 Fire-alarm system Expired - Lifetime US1705227A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2507365A (en) * 1942-02-13 1950-05-09 Anderson Co Temperature responsive switch
US3323460A (en) * 1964-10-26 1967-06-06 Magnavox Co Thermo-torque motor
US6456190B1 (en) * 1997-10-29 2002-09-24 Imego Ab Device for micromechanical switching of signals

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2507365A (en) * 1942-02-13 1950-05-09 Anderson Co Temperature responsive switch
US3323460A (en) * 1964-10-26 1967-06-06 Magnavox Co Thermo-torque motor
US6456190B1 (en) * 1997-10-29 2002-09-24 Imego Ab Device for micromechanical switching of signals

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