US1772127A - Electric fire alarm - Google Patents

Description

Aug. 5, 1930. 1.. c. BROUTY ELECTRIC FIRE ALARM Filed March 9, 1928 Wm 0T 7 7r: LO Q. KQ 3 l 14 W I O 8 Patented Aug. 5, 1930 UNITED STATES LYAL C. BROUTY, OF WATERTOWN, NEW YORK ELECTRIC FIRE ALARM Application filed March 9,

This invention relates to a new product of manufacture which may be conveniently referred to as an electric fire alarm.

More specifically speaking, the invention has reference to a small contrivance, which includes a novel circuit closing element, wherein the parts thereof are normally held separated by a small piece of meltable paraflin or the like, but are adapted to be auto matically engaged with each other when the paraffin melts under the action of heat from a lire.

The principal advantage of the device is the compactness and convenience of arrangement of detail, which permits the device to be inexpensively constructed in quantity lots,

( and easily handled at the time of installation by unskilled hands.

Other features and advantages of the invention will. become more readily apparent from the following description and drawings.

In the drawings:

Figure 1 is an elevational view of the body portion of the device, with the cover removed to expose the internal details, the section being on the line 11 of Figure 2.

Figure 2 is, however, a central section, on the line 2-2 of Figure 1, with the cover plate in position.

Figure 8 is a view showing the wiring diagram.

Referring now to the drawings in detail, it will be observed that the contrivance is of general circular configuration and comprises d a body 4i, which is formed in its inner side with an arcuate channel 5, in communication with the centrally disposed channel 6, which may be referred to as the straight channel. The channel 6 is comparatively wide, and cooperating with these channels we find a pair of complemental resilient wires cooperating with each other in forming an electric circuit closing switch. One element is designated by the numeral 7 and the other one by the numeral 8. The element 7 comprises a longitudinally bowed portion 9 located in one branch of the arcuate channel and suitably anchored as at 10. It also includes a free end portion 11 located in the wide channel 6 and provided with a laterally directed finger Serial No. 260,490.

7 (see Figure 2). In forming the portions, the wire merely bent around a pin or the The elements 8 also comprise the 7 bowed p rtion 13 anchored at l hand branch of the arcuate channel, and a relatively long circuit closing i in 14 bent over and around the pin 15 and tendir down to the end of a channel 6, re it is formed into an eye 16, hearing ainst one end of a plug of paraflin or the 21., located in the channel. Binding 17, Figures 2 and 3 are threaded h orside of the body and have their inner ends in contact with the bowed porlions of the circuit closing wires 7 and 8. Incidentally, the current supply wires 18 are connected with these screws or bolts as shown in F igure 3 and with a signal 19. The signal may be and preferably is a bell. The wires 18 receive current from the house supply or from a battery as represented in the wiring diagram in Figure 3. It is yet to be mentioned that the channels are closed by a circular cover plate 9.0, fastened in place in any suitable manner. Obviously, when the current conducting wires are fastened with the binding screws and when the device is appropriately placed in house, in case of fire, when the heat becomes abnormal, the block or plug of parafiin will melt and will permit the end portion 14 of the wire 8 to swing over into contact with the linger 7*, on the wire 7. This will close the circuit and sound the alarm or give an audible signal.

It is believed that by carefully considering the description in connection with the drawings, a clear understanding of the in vention will be had. Therefore a more lengthy description is regarded unnecessary.

Minor changes coming within the field of invention claimed may be resorted to, if desired.

Having thus described my invention, what is claimed is:

1. As anew product of manufacture, a circuit closer for a fire alarm circuit comprising a substantially circular body formed in one side with a substantially semi-circular channel and a complemental intermediate straight channel, a pair of resilient wires having longitudinally bowed portions disposed in the semi-circular channel and anehored at one end the opposite ends of said wires being bent into said second named channel, one wire being formed with a lateral finger and the other wire terminating in an eye, and a fusible plug located in said second named channel and cooperating with said eye to hold the free end portions of said wires normally spaced apart, but to allow said wires to come together when said plug is subjected to abnormal heat from a lire.

2. In a fire alarm of the class described, a substantially circular body formed on one side with an arcuate shaped channel, and a second channel centrally disposed on the body, said second channelcommunicating at one end thereof with the said arcuate channel intermediate the ends of said arcuate channel. a pair of resilient wires ha ing longitudinally bowed portions disposed in said arcuate channel and anchored at one end,tl1e opposite ends of said wire being bent into said second channel, one wire being formed with a lateral linger, and the other wire being of a length greater than said one wire and terminating in an eye, a fusible plug located in the said second channel and cooperating with t eye to hold the said wire normally out of contact with the said one wire, but to allow said wires to come together when the plug is subjectec to abnormal heat from lire, and a cover plate conforming to the shape of said body adapted to overlie said channels for closing the same.

In testimony whereof I ailix my signature.

LYAL G. BROUT Y.

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