US1171494A - Cut-out for an electric signal. - Google Patents

Description

e. L. BARRETT. I CUT-OUT FOR AN ELECTRIC SIGNAL.

APPLICATION FILED SEPT- 6, I913- Patented Feb. 15,1916.

THE COLUMBIA PLANOGRAPH 50.. WASHINGTON. D- C- enoaer. L. BARRETT, or s'rnmerinnn, oriro.

CUT-OUT FOR AN ELECTRIC SIGNAL.

This invention relates to a cut-out for an I electric signal, such as: a buzzer or hell, and

the object of theinvention is to providejsuch a signal having embodied within itself a cut-out whereby the circuit can be opened and closed at will; and further, toprovide such a device which will be very simple in its construction and operation and willadd little to the cost of the signal. 1

In the accompanying drawings,Figure 1 is a front elevation of-a buzzer. embodying my invention showing the casing removed; Fig. 2 is a rear elevation of thesame; and Fig. 3 is a vertical, sectional view taken centrally through the same with the casing in place.

In these drawings I have illustrated the invention as applied to a buzzer of a known construction but it will be understood that the device can be applied to signals of different kinds, although it is especially adapted to buzzers and bells. The buzzer here shown comprises a base plate 1 having mounted' thereon the usual magnets 2 and vibrator 3.

Mounted on the base 1 are two connectors 4 and 5 which extend through the baseplate, are insulated therefrom and are connected with the coils of the electro-magnet. The connector 4 is connected directly with the 'magnet by a conductor 6 arranged on the back of the base plate, while the connector 5 is mounted in electrical contact with the base and is thus connected through the base plate and vibrator 3 with a contact member 5 which cooperates with the vibrator and is connected with the electro-magnet 2 by a second conductor, 6 on the back of the base plate. The connectors 4 and 5 are preferably connected with the signal clrcuiton the front of the base and within the casing, as indicated at 7. The connector 4 is, in the present instance, in the form of a binding post and has the wire 8, forming one side of the circuit, connected directly thereto. The connector 5 does not have the vwire connected directly thereto, but has that end thereof which is within the casing provided base.

Specification of Letters Patent. Pate t d F b 15 1916 Application filed September 6,1913. Serial No. 78 ,427. I

witha contact surface arranged to be en nected. I In .the present form of the invention'I have, provided alever 9 -having mounted thereon a binding post 10 to which is connected the wire 11 formingthe otherside of the signal .circuit. The lever 9,. :ashere jgag ed by a movable contact member to which the other; side of the circuitis oon- I shown, comprises two offset portions connected by; atransverse portion which ex-' tends through'an opening in the base plate. The lever 9' as a whole extends across the center of the base 'plateand is pivotallyconnected to theibase plate near that edgev thereofopposite the contact'member' 5, as

1 indicated at 12. Thelever is insulated fromthe casing, preferably bymounting the metal portion'thereof on astrip ofinsulating material 13 which is pivotally connectedat the The lower portion of the, lever 9 which carries thebinding post '10 has a portion extendingoutward through the casing and forming a handle by means of which the lever may be moved from one position j to another. As here shown, thelever, when moved to the left, in Fig. 1,"so that it will be brought into electrical contact with the contact member 5, thereby closing the circuit ,in a position to open the circuit, is arranged between the conductors 4 and 5 and can be through the wires 8 and 11 and the magnet.

While the wires of the signal circuit may be led into the casing in any suitable manner I prefer to carry them in from the back through an opening 14. The wire 8 extends directly down to the terminal or binding post 4 but the wire 11 preferably extends upward about the magnets and down the opposite side of the casing and thence to the binding post 10 uponthe lever 9,thus form ing a loop of wire extending about the cas-f ing which will permitof the movement of the lever, to which the wire is connected, without injury to the wire, as might result from a short wire or a wire having a sharp bend therein. I also prefer to provide means for holding the lever firmly in engagement with the contact post or member 5. To this end I have applied a spring to the lever and this spring is shown as. comprising a substantially U-shaped loop of spring wire 15 mounted on the rearof the base, having its upper vends secured thereto on opposite sides of the lever 9 and its transverse portion extending between the lever and the base. The U-shaped wire or spring is so connected with the basethat if unresisted it would extend at a considerable angle to the plane of the base. Consequently, when confined beneath the lever 9 it tends to move the rear portion of the lever away from the base and, consequently, tends to move that portion of the lever which lies on the opposite side of the base toward the latter and to hold the same in firm engagement with its cooperating contact member. Means are provided for preventing the lever from coming in contact with the casing at p a point where it extends through the same, and, to this end, a slotted plate of insulated material 16 is secured within the casing ad- .jacent to the opening through which the lever passes and serves to guide the lever and maintain the same out of engagement with the metal casing.

signal.

While I have shown and described one embodiment of my invention it'will be understood that this-has been chosen. for the purpose of illustration only and that I do not desire to be limited to the details of con struction shown and described, for obvious modifications will occur to a person skilled in the art.

Having ,thus fully described my invention, what I claim as newand desire to secure by Letters Patent, is

A. device of the character described comprising a base having an opening, electrical connectors mounted on said base, an electrical conductor leading to one of said connectors, the other of said connectors comprising a contact member, a lever pivotally mounted on the back of said base on an axis transverse to the plane thereof, extending through the opening in said base to a point near said contact member and having a portion constituting. a handle to enable said lever to be moved into and out of engagement with said contact member, a second conductor connected to and movable with said lever, and a U-shaped loop of resilient wire having its ends secured to said base on opposite sides of said lever and having its transverse portion extending beneath said lever and exerting outward pressure thereon.

In testimony whereof, I ,a'fIiX my signature in presence of two witnesses.

GEORGE L. BARRETT.

Witnesses:

EDWARD L. REED, H. L. HAMMAKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents,

' Washington, .D. C.

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