US799017A - Electric bell. - Google Patents

Description

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N0. 799,017. PATENTED SEPT. 5, 1905.

C. J. SCHWARZE. ELECTRIC BELL.

APPLICATION FILED SBPT 19, 1904.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

CARL J. SCHWARZE, OF ADRIAN, MICHIGAN, ASSIGNOR TO SCHWARZE ELECTRIC COMPANY, OF ADRIAN, MICHIGAN, A CORPORATION OF MICHIGAN.

ELECTRIC BELL.

Specification of Letters Patent.

Patented Sept. 5, 1905,

A2o @ZZ 1071/0/11 it 'nm-fj concern:

Be it known that I, CARL J. SCHwARZma citizen of the United States, residing at Adrian, in the county otl Lenawee and State ot' Michigan, have invented a certain new and useful Improvement in Electric Bells, of which the following is a full, clear, concise, and exact description, reference being' had to the accompanying drawings, forming a part of this specilication.

My invention relates to electric bells; and its object is to provide a simple, practical, and inexpensive construction of such bells.

In the accompanying drawings, Figure 1 is a view in elevation of a bell embodying my present invention having the cover of its containing-case removed. Fig. 2 is a section taken on line 2 2 in Fig. 1, with the cover, however, in place. Figs. 3, 4, 5, 6, 7, and 8 are views ot' details of construction.

The bell which I show herein for carrying out my present invention comprises a base 1, which is conveniently of cast metal. This `base is provided with a circular wall 2, desirably cast integral with the base and having a cover 3, adapted to form with the wall 2 a case for containing' the operating mechanism ot' the bell. The cover 3 is 4secured and held in position by screws 3*l 3", Figs. 3 and et. The base 1 is constructed with lateral projections et e1, upon which the gongs 4 are mounted. The mounting of the gongs is best shown in Fig. 'Iheprojections A 1 are provided with slots 5 5, through which bolts 6 6 are passed. Tubes or sleeves 7 7 are placed upon the bolts 6 6, and washers 8 and 9 are arranged on oppositie sides of the plate forming the body of the base A1. The heads of the bolts 6 6 engage the lower washers 99, and the bolts are provided with nuts 10 10, which engage the gongs A eta. Mounted in this way the gongs A 4 can be secured firmly in position and can be loosened, so as to permit their adjustment relatively to the base 1, as desired.

lVithin the circular containing-case 2 there is arranged a pair of magnets 11 11, which are provided with magnetic pole-pieces 12 12, the ends of which are bent and extended so as to lie between the two magnets. Between the bent ends 13 13 is arranged a strip ot' nonmagnetic material 14. The magnets 11 11 are conveniently secured and supported in position by pins 15 15, which are titted into the pole-pieces 12 12 and also into lugs 16 16,

cast on the inner side otl the annular wall 2, as shown in Figs. 1. 2, and 7. Setscrews 1'7 17 are provided to engage and lock the pins 15 15. A vibrator;v armature 1S, carrying a hammer 18, is arranged adjacent the opposite ends of the magnets 11 11 and pivotally mounted between its ends upon pivots 19 and 20, Figs. 1, 2, and 6. The pivot 2O is set and secured in the plateot' the base 1, and the pivot 19 is supported by a post or standard 21,which rises from and is secured to an elevation or projection 22 on said base 1 by screws 23 23. A set-nut 24: is provided on the pivot 19 to secure the same in adjustment.

The armature 1S is provided with a fiat contact-strip 25, and contact-strips 26 26, having contact-points 27 27, are arranged above the armature 1S, so that the contact-points 27 27 cooperate with the ends of the contact-strip 25. The contact-strips 26 26 are conveniently mounted on pedestals or standards 29 29, conveniently cast integral with the base 1, Fig. 6, the strips 26 26 being insulated Vfrom the base 1 by strips 30 31 of insulating material. A pair of binding-posts 30ll 30 is mounted at the upper end ot' the base 1, and vfrom these are extended conductors 31xL 31, which are connected with the contact-points 27 27 by short connecting=st1ips32 32. From the conductors 32 32 are extended other conductors 33 33, each of which connects one of said conductors 27 27 to one end ot' the opposite electromagnets 11 11. The other ends ot' these magnets are connected with the frame of the bell. rIhus the electromagnets 11 11 are connected in shunt, so that vibration ot' the armature 18 is accomplished by short-circuiting across the terminals of lirst one and then the other of said magnets. This Aform of connection for the electromagnets is more particularly described and claimed in an application iiled by me July 25, 1902, Serial No. 117,032, and hence is not described at length herein.

The hammer 16l ot` the armature 18 is extended down between the electromagnets 11 11 and out of the case 2, so that the clapper or ball 1S" on its end can strike the gongs 4C A112 A shield or protector 35 is arranged to shield or protect the portion of the hammer outside of the case 2 from being' struck or otherwise injured. This shield is much in the It is IOO IOS

conveniently provided with lateral projections or clips 36 36, having screw-holes to permit the use of screws 37 37 to secure it to the base 1.

rIhe particular form of connections for the electromagnetic member which actuates the striking-hammer are. as previously stated, shown and described in my said other application, No. 117,032, and inasmuch as they are claimed therein also they will not be claimed alone inthis application.

The arrangement of the pole-pieces 12 12 with their bent ends 13 13 and the interposed non-magnetic material 14 is set forth, described, and claimed in another application of mine filed May 31, 1904, Serial No. 210,475, and hence such features alone will not be claimed in this application.

It will be understood that changes and;

modifications can be made in the structure herein set forth without departing from the spirit of my invention.

What I claim is- 1.- In an electric bell, the combination of a base having an annular wall formed integrally therewith,- a circular cover for saidV wall, screws for securing the cover to the base, lateral projections on the base provided with slots, a pair of gongs, and bolts for attaching said gongs to said projections to permit adjustment in the slots thereof, substantially as described.

2. In an electric bell, the combination of an electromagnet, a base having a lug 16, a pin 15 extended from said lug 16 in contact with the pole-piece of said magnet, and a set-screw 17 for locking said pin in position, substantially as described.

3. In an electric bell, the combination with a pair of electromagnets, of pole-pieces 12,

12 therefor, a base having elevations or projections 16, 16 arranged opposite said polepieces 12, 12, pins 15,15 extended between the pole-pieces 12,12 and the lugs 16, 16, and inserted in the same, and set-screws 17, 17 for holding the pins 15, 15 in position, substantially as described.

4. In an electric bell, the combination of a vibratory armature 18 pivoted between its ends, andl having contacts for 4making electrical connection on opposite sides of its pivot, contact- strips 26, 26` provided with contactpoints 27, 27,r arranged adjacent the opposite ends of the armature, and standards 29, 29 carrying said contact- strips 26, 26, substantially as described.

5. An electric bell, comprising a base provided with a circular closedv case, an electromagnet having twocores arranged side by side, saidv magnet being confined within said case, means for securing the magnet to thebase, a vibratory armature supportedupon the base and provided with a hammer extending between said cores and out of the case, a pair of gongs secured tofthe base onv opposite sides of the hammer, and a shield for protecting the exposedl portion` of the hammer, substantially as described.,

6. In combination with two bells, a vibratory hammer, and a shield thereforl provided with a tail portion extend-ing over the hammer and transversely to the direction of its Vibration.

In witness whereof` I hereunto-subscribe my name this 14th day of September, A. D. 1904.

CARL J. SCHWARZE.

Witnesses:

WALTER E. Coon, JENNIE- C. Woon.

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