US986706A - Electrothermostatic alarm system. - Google Patents

Description

A. GOLDSTBIN. 'BLECTEOTHBRMOSTATI ALARM SYSTEM.

APPLICATION E'ILED AUS. 1910.

Patented Mar. 14,1911.

ummum 1| mmm! WDM/0450,02

- i G are constructed. alike, so that ALBERT GoLDe'rniN, or Nnw Yonx, N. Y., AssiGNon ro mrnimiia'romin ELECTRIC PROTEOTIO COMPANY, A CORPORATION OF EW YORK.

ELECTROTH'ERMOSTATIC ALARM SYSTEN' specification of Letters Patent.

Patentea Mar. 114, 1911;

Application filed August 6, 1910. Serial No. 575,899.

a Toial 'wii/om, it may concem':

-Be it known that I', ALBERT GoLDs'riiiN, a citizen of the United States, residing at New York, in the county of New York and State of New York, have inventedl acertain new and useful ,I'inprovement in Electrothervmostatic Alarm Systems, of: which the following is a specification.

system, whereby The invention relates to an electro-thermostatic alarm system, whereby upon a rise in temperature at` any station of a number of stations, an audible alarm is sounded both at said' station and at a' central oflice.

Tlie invention further consists in the applicat'ion of said' system to an ordinary bell both systems derive energy from the same source and utilize the same main conductors' The accompanying' di'awing. exhibits my system and shows the station alarm apparat-us and the central oflice alarm apparat'us i'espectively in longitudinal cross section.

1 is a central battery or other suitable source of currentI`` iii circuit with which is a bell 2 and push buttons 3, 4, located at the several distant st'ations. Said stat-ions may, for example, be rooms in a hotel, in which case, t'he hell 2 would be located at t-he olice-t-he arrangeinent .being that' of' the ordinary hell system in common use, to

.which Without change 'my alarm system is here shown as applied. IIn each room I provide an electro-thermostatic alarm as and 6. At the central ofiice I ,providea receiving ala-rm 7. Theroom alarms 5 and a description of one applies to all. The construction 'of said room alarm (which is fully set o ut and clainied in another application 'for-Letters Patent, Serial No. 575,901, .filedsimultaneously 'herewith I and therefore is not her'ein claimed) is as .followsz The device is attached to a wall or 'ceiling A. B is a hollow cylindrical 'ca-sing of iron, having a partition C; -To the under or outer side of the artition is secured the electro-magneticoilP'D, 'having a tubular pole piece E. Through the coilgand pole piece'passes the brass rod F, which is'connected. at its lower end'to a boss ,Glen asheet iron diaphragm H secured to the outer open. end of the' casing. The' inner or 'upper end of rocl F eirtendsthrough the leaf spring I, above which it' is---`headed. lSaid spring is secured at one lend ,toalug on the partition C;

' ciently to permit the from is a contact J which bears against the spring I'. The inner or upper end'of casing .B is closed by a partition K, upon which is v,mounted a ldia-phragm L made L' per` as thin as' possible.-

of Sheet cop- Between the diapliragm L and the partition K is formcd a Moiiiited on part/ition Ciout insulated there- ,i

chamber Ma In the partition K is aii air vent N. On the outer side of the diaphragm is disposed' acontact carried by aleaf spring O which is secured to a ring P of insulat-ing material, which ring' i'ests against the wall or ceiling when the apparatus is secured thereto by means of screws, as shown at Q. Outside of the diaphragm H and preferably secui'ed to the casing by the scre'ws which attach said diaphragm thei'eto is a frusto-conical cap R, upon which is mounted the flanged inner half of the annular air chamber S. The outer half of said Chamber 'is fianged to fit upon the inner half. vThe walls of said Chamber are preferably made of sheet copper as 'thin a's practi'cable. The interior of said Chamber is connected to 'the Chamber M by means of a 'metal tube 'T, which, as here shown, passes outside ofthe .casing and through. thewall thereof and through the partition K. The placing of' tube 'T outside of the casing is not essential, since it may obviously be disposed within the same in any suitable way. A' metal horn U having a shoulder V is seatedl at its -smaller end inthe circular space inclosed the anni'ilar air Chamber S.

The operation vis as follows: Vhen the atmosphere surrounding chamber S becomes heated and the air .in said Chamber 'ex'pands at. a rate in excess of that determined by the size of the rent N, the diaphi'agm L is raised to meet the contact carried by spring O. Circuit is then established from main .circuit Wire a, to`coil D,

.tocontact J, spring I, caing B, diaphragm L, contact and spring O, and' so to main Circuit Wire 7). The magnet, however, in

'raisiu'g dia-phragm H,`lifts rod F and so permits spring-I to riise, thus causing circuit to he broken between contact v I, with the result that said diaphragm is' set iii'rapid vibration, producing a loud audible J and spring alarm which is amplified by the horn U.

This' ,alarm continuessounding until the. 'temperature of the atmosphere falls suiiig diaphragm L to break Circuit with spring The central otiice alarm 7 comprises a cup-shaped casing S, closed above by a metal diaphragm and containing an electro-magnet coil 10, connected inthe main conductor Z). Sccurcd to the casing in front of the diaphragm is a sound amplifying horn 11.

The operation of the whole system is as follows: l'V hen an)I one of the' room alarms is set. in operation by an increase in temperature, in the mauner already described,`

a frequency is im posed upon the current on the main conductors, so that the attraction of the magnet 10 in casing 8 isintermittently exerted on diaphragm 9, causing the same to vibrate and to produce an audible ala-rm which is amplitied by horn 11. It is thcrefore to be noted-l. That, upon rise of atn'iosphcric temperature at any distant stationas, for example, in any room of a hotel-an audible alarm is sounded both in that room to warn the occupant, and in the central or hotel oflice to warn the people' 1. The combination in circuit of (1)4 vmeans for nnultaneously producing a frequency current and an alarm, and a. Circuit closer in shunt With said means; and (2) at a distant. station, two alarm devices, one of said devices being responsive and the other irresponsive tosaid frequency current.

The combination in circuit, and (l) at each of a` plurality of sub-stations, of

means for.simulta.neously producing a frequency current and an alarm, and a circuit closer in shunt with said means; and (2) at a distant station, two alarm devices, one of said devices being responsive to the frequency current; from any one of said Substations and the other device being irresponsive to said frequency current.

3. A fire alarm appafratus comprising the combination in circuit of (1) means for simult-aneously producing' acertain frequency current and an alarm, and a thermostat controll'ing said means; and (2) at a' distant station, an alarm device responsiv'e only to said frequency current.

et. The combination in Circuit, and (1) at each of a plurality of'sub-stations, of means for simultaneoush1 producing a frequency current and an alarm, al circuit'closer in shunt with said means, and a thermosta-t controlling said meansland ata distant central station, two alarm devices, one' of said devices being responsive to the frequencyY current from any one of said substations and the other device being irresponsite to said frequency current.

The combination of a plurality of electro-magnetieally operated devices, each producing a frequency current, and an audible alarm signal, and a plurality of Circuit closing` sn'itches connected in parallel across a main line, and, in series in said line, a battery, an audible alarm producing device responsive to 'said frequency current, and' an audible alarm producing device not responsive to said frequency current.

In testiinony Whereof I have aflixed my .signature in presence of twowitnesse's.

ALBERT GoLDsTEIN.

Witnesses Gi'm'rnron ,'l`. Pon'rnn, Mai' T. McG-Anny.

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