US1746482A - Fire-alarm apparatus - Google Patents

Description

Feb. 11 I in w, KLUZ 1,746,482

FIRE ALARM APPARATUS Filed Fen. l, 1928 g g a; Izwemmr b I 1 67 IIIlIIIIIII/fi In; 55 7 Patented Feb. 11, 1930 WLADYSLAW KL'EIZ, OF IPATERSON, NEXV JERSEY FIRE-ALARM APPARATUS Application filed February 1, 1928.

This invention relates to improvements in fire alarm apparatus, and particularly to a thermostatic device for closing an electric alarm circuit as soon as the temperature exceeds a certain predetermined degree, and it is the principal object of my invention to provide an automatically acting fire alarm apparatus normally held in inoperative posit-ion by a meltable wax or like substance connected to a circuit closing means in such manner that upon the melting of the wax an electric alarm circuit is automatically closed.

Another object of my invention is the provision of a fire alarm apparatus of this type equipped with a means for interrupting the alarm after the sounding thereof.

These and other objects and advantages of my invention will become more fully known as the description thereof proceeds, and will then be specifically defined in the appended claims.

In the accompanying drawing forming a material part of this disclosure Fig. 1 is a plan view of a fire alarm apparatus constructed according to my invention.

Fig. 2 is a sectional side elevation thereof.

Fig. 3 is an end elevation of the apparatus seen in the direction of the arrows 3-3 of Figure 2.

Fig. 4 is a sectional side elevation of a contact member.

As illustrated my fire alarm apparatus comprises a receptacle or box adapted to be located at any suitable place in a room or building to be protected against a conflagration, having a central opening closed by a grating 11 or the like, and lateral brackets 12 to secure the apparatus in place.

Within the box an arm or lever 13 is secured at one end on a transverse pin journalled in upright-s 15, 15' connected at their lower ends and secured by means of suitable fastening means 16 to the bottom 17 of box 10. A spring 18 is wound about uprights, pin and arm in such a manner as to tend to Serial No. 251,130.

depress the forward end of the arm 13 for a purpose to be hereafter more fully described. The free end of arm 13 is formed into a tongue 19 and at the root of this tongue the upper edge of arm 13 carries a hook 20.

A post or standard 21 is erected on top of box 10 and secured thereto at its foot 22, while its upper angularly disposed arm 23 has at its free end formed a hook 24 adapted to be engaged by a hook 25 on the upper end of a rod 26, the lower end of which carries a substantially circular crown or support 27 in the lower dome-shaped part of which a strong layer of a suitable sealing wax 28 is inserted and held in place by a holder 29 on the upper end of a rod 30 the lower end of which is hook-shaped and adapted to engage the hook 20 of arm 13.

Normally, the tongue 19 of arm 13 rests upon the head of a vertically disposed cylinder 31 in which a rod 32 is displaceable against the action of a spring 33 wound upon said rod within said cylinder and secured with its upper end in said rod, while its lower end grips over a flange 3% of the cylinder, as indicated at 35.

The flange 3% is forwardly extended, as indicated at 36 and has an angular contact finger 37 formed therewith adapted to engage into a recess 38 of a contact plate 39, the other end of which extends out of the boX, as indicated at 40 and has attached a wire 41 of an electric circuit in which an alarm device of any well known type is located, the other wire 12 of which circuit is attached to another plate 39 also having a depression 38 and the free end of which is normally held inclined by engaging a latch or similar device 48, which however can be turned about point 47 to assume a vertical position by the engagement of a suitable lug or lock 49. This position is indicated in broken lines in Figure 2, and will raise the tongue 19 out of engagement with cylinder 31 allowing spring 33 to carry contact finger 87 out of engagement with plate 39.

The operation of my device will be entirely clear from the above'description and further explanation will not be necessary.

It will be understood that I may make such changes in my device as come within the scope of the appended claims without deviation from my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In an automatic fire alarm apparatus a casing, a post on said casing, a crown depending from said post, a circuit closer, a quickly melting substance in said crown, a holder for holding said substance in said crown, a hooked rod connecting said holder with saidcircuit closer, and a means for allowing a re-opening of the circuit after each closure by an incipient confiagration for sounding an alarm.

2. In an automatic fire alarm apparatus of the class described, a box, an arm horizontally disposed in said box, standards between which one end of said arm is pivotally ar- 1 ranged, a means for. tending to depress said arm, a circult closer adapted to be engaged by said arm to close an alarm circuit, and a means including a material melting at a certain temperature normally holding said arm out of engagement with said circuit closer, but allowing the closing of the alarm circuit to sound an alarm upon the rise of the temperature within a room. above a dangerous degree, and a means for allowing a resettin of the alarm after each operation.

3. In a thermostatically operated fire alarm apparatus of the class described, a thermostatic element for normally keeping the 'alarin'circuitopen, a circuit closer for the alarm circuit comprising a cylinder, a pair of contact plates equipped with recesses, contact arms on said cylinder adapted to engage in the recesses of said plates for closing the circuit, and a spring for holding the circuit closed, means engaging said cylinder to hold the circuit closed upon the actuation of said thermostatic element, and a means for opening the circuit mechanically and for holding it open after each operation to sound the alarm.

4. In a fire alarm apparatus of the class described a circuit closer including a tongued lever, and a means for opening the circuit after each closing operation, said means comprising a rod pivotally connected at one end to said lever, and means for normally holding said rod inclined and inoperative, said

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