US79973A - Improved electro-magnetic burglar and fire alarm - Google Patents

Description

Patented July 14, 1868.

UNITE STATES.

PATENT OFFICE.

JOHN H. GU'ESTLOF BROOKLYN, NEW YORK.

IMPROVED ELECTRO-M'AGNETiC BURGLARA-ND FIRE ALARM.

Specification forming partof Letters Patent No. 79,973, dated July 14, 1868.

To all whom it may concern:

Be it known that I, JOHN H. GUEST, of Brooklyn, in the county of Kings. and State of New York, have invented and made a certain new and useful Improvement in Fire and Burt glarAlarms; and I do hereby declare the following to be a full, clear, and exact description of the said invention, reference being bad to the annexed drawings, making part of this specification, wherein- Figure 1 is an elevation of the magnets and bell. Fig. 2 is a plan of the same. Fig. 3 is a section of the thermal circuit-closer. Fig. 4 is an elevation, and Fig. 5 a section, of the designating and disconnectingapparatus. Fig. 6 is a section of the circuit-closer that is connected with a window, to close the circuit when said window is opened, Fig. 7 is a section of the circuit-closer that is employdwith adoor or other swinging article.

Similar marks of reference denote the same parts. I

This apparatus is arranged upon the generially-known plan of giving an alarm by a bell whenever the-circuit of a galvanic battery is closed by the movement of any device that should remain stationary, thus giving an alarm and indicating that some portion of the apparatus is not in a normal condition.

,I will first describe my alarm-bell, which consists in two magnets, a and b, with two armatures, c and d, ouone lever, c, that is hung,

.to oscillate, and is connected with the hammer f that strikes the bell g. 'h and t are springs to the adjustable circuit-closers k and Z.

By reference to the lines i n Fig. 2, indicating the wires of the electrical circuit, it will be seen that when the electricity passes through the helix of the magnet a the attraction ofits armature will separate and Z and break the circuit to itself, and at the same time close h and la, and causethe magnet b to attract its armature d, and thereby reverse the circuits, and this is done with .the utmost rapidity, causing the hammer to strike the bell, and that without depending on springs to produce the reverse movement, as heretofore.

The lever e is suspended either by a spring, 6, as shownin Fig. 1, from the screw d, by which the positionof the armatures is adjusted, or said levere may be centered by screws a I in a yoke, b, that is adjusted vertically by the screw d, and the centering-screws a, passing through slots in the frame 0', prevent lateral motion, so that the armatures are free to vibrate, but cannot easily become displaced. .Fig. 9 .represents this variation in the mode of hanging the 'arinaturcs.

The switch 0 when standing between the studs 2 and 3, causes the whole apparatus to be inoperative. When upon the stud 2 the apparatus is in position for use when either of hinged the circuit-closer m, that, in a normal condition, is sustained by the hook 5, but when the air in the box m expands by the temperature of the apartment in which it is applied, rising beyond a certain point, the head 4, being pressed outwardly in its center, causes, the .closer m to unlatch, and it drops upon the arm 6, to which one wire of the circuit is connected, while the'other is connected to thebox 111,} thus closing the circuit and ringing the In Fig. 3 I have shown the box m and arm m movable, so that they may be adjusted by a screw, 7, to an y desired point, so that the alarm will be given at adefinite temperature, and 8 is a dialupon which figures may be marked to indicate at a fixed pointer, 9, the degree of heat at which the apparatus will become operativ'e.

- In Fig. 8 I have shown the screw and pointer 9, as applied to the just that instead of the box m.

The circuit-closer, which becomes a temperature or fire alarm, is to be located in any desired part of a building. It is preferable that the same be attached to the ceiling, as being in a position to be most likely to operate by changes of temperature.

The circuit-closer for a window, Fig. 6, is made of a hanging pendulum, n, upon a ful- 7, dial 8,

orum, 10, to which one wire of the battery isapplied. The upper end, 11, of this pendulum is a spring, and when the window-sash 0 is in its normal or closed position the pendulum it hangs freely in a notch in the side of the sash;

hook 5. to ad- 14 is a second spring insulated from the 1 plate p, but, for convenience,'connected thereupon, and to this the other battery-wire is connected.

The door w, acting against the pusher q upon the s ring 14, separates the springs 14 and 13 whenthe door is closed; but when it is opened the two springs come together and close the' circuit.

The designating and disconnecting apparatus (shown in Figs. 4 and 5) consists in a plate, 1 to which one of the battery-wires is connected. Through this plate there areas many holes as there are points to be designated by the connections of the battery, such as fire, window, door, or other sub-designations, and in each of these holes is placed a screwstud, s, that is insulated from said plate by being smaller than the hole, so as not to touch it, and said stud receives its support from the wooden or other non-conducting base of the plate 1:

A wire from the diii'erent points to be designated leads to the different studs 8, and on each stud is a nut t, and the button-head of the stud may be appropriately engraved or marked with the name required.

Ail the nuts t should be kept screwed upon the plate 1. If the alarm-bell rings, the attendant unscrews first one nut, t, and then another, until he arrives at the particular circuit that has been closed and is operative, which he knows by the separation of t and r, stopping the bell by breaking that particular circuit, and thus itis known what part of the premises requires attention.

In place of a metal air-box" the corrugated disk forming the circuit-closer might be set in a wooden rim, and act by its expansion as the thermal circuit-closer.

What I claim, and desire to secure by Letters Patent, is-

1. A pair of m agnets and armaturesarranged and acting in the manner specified, in combination with a hammer and bell, the former being attached to the lever of the armature, for the purposes, and as set forth.

' 2. An expansive corrugated disk andhinged arm forming a thermal circuit-closer, substantially as set forth.

3. The adjusting-screw 7, in combination with the thermal circuit-closer, as and for the purposes set forth.

4. The pendulum and sprin g, in combina tion with the circuit-wires and notched sash or slide to close the circuit, as specified.

.5. The two springs 13 14, connected with the circuit-wires, in combination with the pusher q, for the purposes, and as set forth.

6. The plate 1, screw-studs s, and nuts t, constructcd substantiaily as specified, in combination with the circuit-wires,- to form a designatin g or disconnecting apparatus in a fire or burglar alarm, substantially as set forth.

In witness whereof I have hereunto set my signature this 28th day of March A. D. 1868.

J. H. GUEST.

Witnesses CHAS. E. SMITH, Geo. D. WALKER.

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