US995221A - Automatic fire-alarm. - Google Patents

Description

W. P. BRITAIN & G. J, PAGKMAN.' AUTOMATIC FIRE ALARM.

APPLIGATION FILED MAY '1; 1910.

995,221, "Patented June 13,1911.

UNITED mm PATENT OFFICE,

WILLIAM F. nnrram AND (mouse JOHN Pacmun, or wns'rrmuus, urssoo'ar.

Auromarxo emu-Amen.

Specification o! Letten Intent: Patented flune 13, 1911.

Application Mud Kay 7, 1810. krill In. 0,086.

TQ all whom it may concern:

Be it known that we, WILLIAM P. BRITAIN and Gnonon Jorm PACKMAN, citizens of the United Stat-es, residing at Westplains, in the county of Howell and State of Missouri, have invented certain newand useful Improvements in Automatic FireAlurms, of

' the which the following is a specification.

This invention relates to automatiofire alarms of that class in which fusible elements are used to close the electric circui of alarms and the like.

It has in view the construction of a deviceof the above nature comprisin outer and inner casin or members, to either one of which may $6 applied an easilyiusible condu'ctive metal causing the same to fuse and form a contact between the casin when the temperature outside becomes hig er than usual.

With theahove and further objects in view this invention consists in' the co1istruction, combination, and arrangement of parts all as hereinafter more fully described, specifically claimed, and illustrated in the accompanyin drawings, wherein- Figure 1 i ustrates the manner-in which resent invention is used; Fig. 2 is. a

longitudinal cross section of the device; Fig.

3 is a bottom plan view of the outer casing;

- Fig. 4 is a top plan view of the inner-casing; Fig. 5 is a plan view of the insulating material for use with the resent invention; Fi 6 is a cross section 0 the device.

l toferrin more particularly to the 'drawings A indicates an alarm of any nature such as. a hell or annunciator having the usual connections to the bat-tery. p v

-'Ihe present invention as indicated; at B may be connected to the circuit wires at various (intervals and referslbly in places where fire would likeiy break out. .This device or electric circuit. closer B is composed of a plurality of plates or casings '1 and 2.. The outer ilate 1 comprises a. cir

having a cone center 3 V and oppositely extending wings 4 and 5, the

cular piece of meta wing 4 being of greater length than the wing The inner casing or plate 2 is similnrly constructml having a cone center 3' adapted to extend upwardly into the cone 3. Extending radially from the outer plate and extending'lateruliy from the wings 4 and 4 are a-plurality of cars 6 adapted to be bent over the opposite casing for retaining the two together. Applied'to either cone center is an easily fusible conductive metal 'or it may be applied to the outer face oi the cone 3 or to both as may be desired. This material or metal may be of variehle fusingpoints according to the positioning" of the same.

This device may be secured in any position but preferably against a side wall or ceiling, the same making a sure contact of the two plates when the metal fuses. Any suitable means may be used in securing the circuit closer to the wall, as a screw 10 to which also the wires may be secured, said screws piercing the wings i and 4'.

Having thus described our invention, what we claim as new is; V

1. In an electric circuit closer, the combination of an putter casin provided. with c cone center, mi inner casing'providcd with a cone center adapted to project into the first named cone center, a plurality of cup-ositely extending wings secured to can ing, a plurali y of radially extendin e, e on one casing, a plurality of lateraliv ex? tending ears on one wing of each casing, an insulating material interposed between said casings, and a fusiblecompound applied to one cone center for the purpose herein set forth.'

2. As 'an article of manufacture, an electric circuit closer, comprising s aced conducting members having conica portions,

the conical portion of one member nesting with the conical portion of the other mcmber,'-,insulat ing material interposed between. said members, fusible metal applied to one member adapted to fuse and com lets the electric circuit, and ears provide on one member adapted to bind over onthe other 7 member for retaining said memberstogethcr said ears being insulated from said other member set forth;

3. As an article of manufacture, an electric circuit closer ,comprising spaced oonducting plates provided with conical porfor ret tions, the conical portion of one member nesting with the conical portion ofthe other member, an insulatingring interposed be- 5 tween said plates adjacent to the conical pgrtions, fusible metal applied to one memr and adapted to fuse. and complete the Wit-1 forth.

electric circuit, and ears provided on one plate adapted to bind over the other plate aiming the plates together, said ears 10 being insulated from sand other plate, as set WILLIAM P. BRITAIN.- GEORGE JOHN PAUKMAN.

eases: BEN-M. Amer, 11. M. LANE.

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