US881539A - Electric bell. - Google Patents

Description

APPLICATION FILED MAR. l. 1906.

PATENTED MAR. 10, 1908.

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striker and bell are mounted entirely outside UNITED DONALD M. BLISS,

' ELECTRIC BELL;

Specification of Letters Patent.

OF NEW YORK, N. Y.

Patented March 10, 1908.

Application filed Marci. 1, 1906. Serial No. 803,620.

To all whom it may concern: 1 Be it known that I, DONALD M. Buss, a 1 subject of the King of Great Britain, residing in New York, county and State of New 1 York, have invented an Improvement in Electric Bells, of which the following description, in connection'with the accompany-- ing-drawings, is a specification, like letters on the drawings representing like parts. The resent invention relates to an electric bell and is embodied in a bellfor outdoor use, the purpose being to inclose the windings, contacts, &c.,which are liable to be injured .1 by exposure to weather, in a water-tight case. This is accomplished in accordance with the invention without 'inclosing the striker, so that the-latter can come into direct contact with the bell, the action not being interfered with by any inclosing i member interposed between the striker and g the bell, there bein at the same time, no opening for the stri er through the case to admit moisture. 1

In accordance with the invention, the

of the casing, the striker being connected with an armature which is in the magnetic field of an electro-magnet contained within the casing, while the polar extremities of said electro magnet project through the wall of the casing to the outside thereof, this part of the wall being of non-magnetic substance.

In order to make and break the circuit to produce the vibration of the striker armature, the instrument is provided in the interior of the casing with a supplemental electroi magnet controlling a circuit interrupter, the contactsof which are within the casing; l

The drawing is a vertical section, partly in'elevation, through the walls of the cas- 1 ing, showing the operating parts mainly in The bell a is shown as sup orted on 'a' pro--: jection c from one wall of t e casing e, the 3 bell being operated u on by the striker b which is also mountei outside the casing", being hereinshown as supported. upon the spring member I) secured at b to the outer 5 wall of the facing c. i V I In order to cover and rotect, to a certain extent, the striker I) am .the parts where it i is connected to the casi g? upplemental hood 1) maybe secured to the outer wall of the casing,*this hood also being shown as the casing c, Whi

Q ing bell.

justing stop If. The striker b has connected therewith an armature 1)"- which stands in the magnetic field of an electro magnet d, the

coils and windings of which are inclosed in e the pole pieces (1 project through the wall of the casing, being tightly fitted in said wall so as to render the casing .moisture-proofi In order to produce ,the vibration of the strikenb and consequent operation of the bell, it is necessary to'provide the instrument with a circuit interru ter, and in order that said interrupter may e inclosed in the case andv be fullyprotected, the instrument is provided with a supplemental electro magnet e to influence the armature f of ,the circuit interrupter, which consists of the movable contact f 2 and fixed contact f". The

fixed contact f is connected by means of a conductor 2 with the binding post 3 inside the casing, the said binding post having electrical connection-with'the conductor A of the main circuit.

The main circ it conductors A and B are shown as led .ito the casing 0 through a stuffing box C,-and the conductor B is con nected with the binding post 5.

The movable contact f is shown as a spring electrically connected with a metallic sup orting member f which is connected Wit a conductor 4 which includes the coils of the magnet e and the coils of the magnet d in series, and is connected with the binding post 5 and conductor B of the main circuit. he armature f is rovidedwith an adjustable weight whic tends to hold it in such a position that the fixed and movable contacts z and f are in electrical engagement. If, therefore, the current is turned on, a circuit-is closed through both electro magnets (land e, attracting the armature b to strike the gong a, and the armaturef to break the circuit. The circuit being thus broken, thearmature f returns to its original position again (closing the circuit, the instrument operating after the usual manner of, a vibrat- By the employment of the ad'usting weight f, the period of vibration of armaturefmay be brought into unison with that of the armature b, sov that the two armatures will vibrate together.

What'I claim is:

' An electric vibrator bell comprising a gong a' striker therefor; an -armature con- 55 affording a support for the armature ad: inected with said striker; an electro-magnet '1 o [0 cooperate with said armature; a. waterstuffing box for said leading-in wires to ren- 10 tight inelosing ease for the windings of said der the case completely water-tight. electro-magnet, the polar extremities of said In testimony whereof, I have signed my eleetro-magnet projecting through the wall Il11110 to this specification in the presence of a of said case; av circuit interrupter contained two subscribing witnesses.

in said case and consisting of an electro- DONALD M. BLISS. ma net and a. c-ircuit-controlling armature; Witnesses: lea ing-in wires to supply the circuit through W. E. COVENEY,

the electro-magnets inside the case; and a i H. J. LIVERMORE.

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