US277965A - Automatic circuit-closer for electric fire-alarms - Google Patents
Automatic circuit-closer for electric fire-alarms Download PDFInfo
- Publication number
- US277965A US277965A US277965DA US277965A US 277965 A US277965 A US 277965A US 277965D A US277965D A US 277965DA US 277965 A US277965 A US 277965A
- Authority
- US
- United States
- Prior art keywords
- closer
- alarms
- circuit
- electric fire
- button
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000011810 insulating material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 229910000743 fusible alloy Inorganic materials 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000615 nonconductor Substances 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
- H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
Definitions
- JESSE 0. wELLs, or n Es-MomEs,'1owA.
- the object of myinventi'on is to savelifeand property from fire by providing a means for automatically closing the circuit in an electric fire-alarm as required to ring a bell or series of bells when a fire originates and the temperature rises in any part of a building in which wires are located for electric-alarm purposes.
- auxiliary metal spring With the armature of a push-button circuit-closer and insulating it by means of ,fusible matter, as hereinafter fully set forth, in such a manner that when the temperature rises sufficiently to fuse the insulating material the. force of the auxiliary spring will be exerted to automatically perform the function of a pushbutton in closing the circuit as required to signal and alarm by ringing a bell in an office or station, or a series of bells located in a corresponding series OfIOOlllS or stations in a building.
- FIG. l of my accompanying drawings is a top "iew of the uncovered base of a push-button to which my insulated auxiliary spring is attached.
- Fig. 2 is a top View of the cover.
- Fig. 3 is a half-section of a complete push-button and circuit-closer having my auxiliary insulated spring attached. Together these figures clearly illustrate the construction and operation of my complete invention.
- n. represents the wooden base of a push-button of common form.
- b is a raised center, that has a screw-thread on its periphery.
- c is a curved metal plate, fastened on top of the raised portion 1) in such a manner that it will extend from its circumference to the center.
- d is a metal spring-plate, fixed on the opposite side of the center of the same raised surface i) in such a manner and position relative to the plate 0 that the free end of the spring will in its normal condition extend over the inner end of the plate 0, and overlap and engage it when pressed down by means of the button placed on top of it.
- auxiliary metal spring fixed on top of the base I) and plate or spring cl by means of screws, or in any suitable way.
- h represents a piece of wax or other suitable matter that will fuse at a low degree of heat and that is a non-conductor, placed between the plate 0 and the free end of my auxiliary spring to retain it elevated and insulated.
- k is a cup-shaped cover, adapted to fit upon and screw fast to the base a b in a common Way.
- buttons, m projects upward from the free end of the spring d, upon which the bottom of the button rests.
Description
(No Model.) J. O. WELLS.
AUTOMATIC CIRCUIT CLOSER FOR ELECTRIC FIRE ALARMS. No. 277,965. Patented May 22,1883.
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UNITED STATES PATENT OFFICE.
JESSE 0. wELLs, or n Es-MomEs,'1owA.
AUTOMATIC CIRCUIT-CLOSER FOR ELECTRIC FIRE-ALARMS.
SPECIFICATION formingpart of Letters Patent No. 277,965, dated May 22, 1883u Application filed J'anuary 29,1883. (No model.)
To all whom it may concern v Be it known that I, JEssE O. WELLs, of Des Moines, in the county of Polk and State of Iowa, have invented an Automatic Circuit- Oloser for Electric Fire-Alarms, of which the following is a specification.
The object of myinventi'on is to savelifeand property from fire by providing a means for automatically closing the circuit in an electric fire-alarm as required to ring a bell or series of bells when a fire originates and the temperature rises in any part of a building in which wires are located for electric-alarm purposes.
It consists in combining an auxiliary metal springwith the armature of a push-button circuit-closer and insulating it by means of ,fusible matter, as hereinafter fully set forth, in such a manner that when the temperature rises sufficiently to fuse the insulating material the. force of the auxiliary spring will be exerted to automatically perform the function of a pushbutton in closing the circuit as required to signal and alarm by ringing a bell in an office or station, or a series of bells located in a corresponding series OfIOOlllS or stations in a building.
Figure l of my accompanying drawings is a top "iew of the uncovered base of a push-button to which my insulated auxiliary spring is attached. Fig. 2 is a top View of the cover. Fig. 3 is a half-section of a complete push-button and circuit-closer having my auxiliary insulated spring attached. Together these figures clearly illustrate the construction and operation of my complete invention.
n. represents the wooden base of a push-button of common form.
b is a raised center, that has a screw-thread on its periphery.
c is a curved metal plate, fastened on top of the raised portion 1) in such a manner that it will extend from its circumference to the center.
d is a metal spring-plate, fixed on the opposite side of the center of the same raised surface i) in such a manner and position relative to the plate 0 that the free end of the spring will in its normal condition extend over the inner end of the plate 0, and overlap and engage it when pressed down by means of the button placed on top of it.
' Nos. 1 and 2 representwires connected with,
the armature-plates c and d by means of pins f, that extend through the base a, and are fixed to the armature-plates, or in any suitable way.
9 representsmy auxiliary metal spring, fixed on top of the base I) and plate or spring cl by means of screws, or in any suitable way. may be made of wire or sheet metal, and vary in form '5- but it is essential that its freeend g extend over the outer position or end of the fixed armature-plate c in such a manner-that it will, in its normal condition, press upon the plate 0 and form a connection between the two plates 0 and d and the two wires Nos. 1 and 2, as required to establish an electric circuit.
h represents a piece of wax or other suitable matter that will fuse at a low degree of heat and that is a non-conductor, placed between the plate 0 and the free end of my auxiliary spring to retain it elevated and insulated.
k is a cup-shaped cover, adapted to fit upon and screw fast to the base a b in a common Way.
3, 4, and 5 represent perforations through the cover, to allow heattoenter and melt the wax h.
6 is an opening in the center of the cover. through which a button, m, projects upward from the free end of the spring d, upon which the bottom of the button rests.
In the practical operation of my improved circuit-closer the complete push-button is applied in a common way and operated at pleasure by simply pressing upon the button m to close the electric circuit for the purpose of making a call-signal or to give an alarm; and \VhQUGTBi a fire occurs close enough to the button to cause the wax or insulating material It to fuse, my auxiliary spring and circuit-closer will assume its normal position and form a connection with the plate cand establish a circuit between the two plates 0 and d and the wires Nos. land 2, to automatically perform the function of an operator in giving an alarm when the occupants of the room or building may be asleep or absent.
1 am aware that easily-fusible alloys have been combined with electric fire-alarms and circuit-closers in such a manner that a rise of temperature caused by fire would melt the fusible matter, and thereby connect or break electric circuits to automatically operate alarm mechanisms. I am also aware that a bar composed of two metals has been coiledwithin and I claim as my invention- In a push-button circuit-closer, the combination of a plate, 0, having a conducting-pin f attached, a spring-plate, d, having a conducting-pin f attached, an auxiliary spring, 9, and a fusible insulator, 7:,substantially as shown and described, to operate in the manner set forth, for the purposes specified.
JESSE 0. \VELLS.
Witnesses:
THOMAS G. ORWIG, GEO. F. HENRY.
Lil
Publications (1)
Publication Number | Publication Date |
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US277965A true US277965A (en) | 1883-05-22 |
Family
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Family Applications (1)
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US277965D Expired - Lifetime US277965A (en) | Automatic circuit-closer for electric fire-alarms |
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- US US277965D patent/US277965A/en not_active Expired - Lifetime
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