US1292523A - Electric bell. - Google Patents

Description

Patented Jan. 28, 1919.

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UNITED STAES PATENT OFFICE.

I CARL J". SCHWARZE, 0F ADRIAN, MICHIGAN, ASSIGNOR TO SCHWARZE ELECTRIC COMPANY, OF ADRIAN, MICHIGAN, A CORPORATION OF MICHIGAN.

ELECTRIC BELL.

Specification of Letters Patent.

Patented Jan. 28, 1919.

Application filed September 1, 1917. Serial No. 189,258.

To all whom it may concern Be it known that I, CARL J. SoHwARzn, a citizen of the United States of America, residing at Adrian, in the county of Lenawee and State of Michigan, have invented certain new and useful Improvements in Electric Bells, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to electric bells and has for its object the obtaining of a simple and inexpensive construction to manufacture. To this end the invention comprises the novel construction as hereinafter set forth.

In the drawings:

Figure 1 is an elevation of the bell with the cover removed;

Fig. 2 is a vertical central section through the bell;

Fig. 3 is a section on line 3-3 of Fig. 2.

A is the supporting base which is formed of pressed sheet metal having a body portion B with a recess C in its upper face and an extension D at one end thereof. E is the bell mounted upon the extension D by means of a. bracket F bent from a strip of metal into substantially U-form, one leg thereof being connected by the screw G to the bell and the opposite leg connected by the screw H to the base, a projecting lug I engaging a slot J in the base serving to hold the bracket from turning. The electro-magnet K is formed of two spools upon core members L, which core members are attached at one end to a flange M of a Z-shaped sheet-metal member M' the central portion of the 2 being attached by a screw N to the base in the depression C thereof, and the opposite end portion M of the Z paming through an aperture 0 in the base. The opposite ends of the core members L are mechanically connected by a member P which is of non-magnetic material to avoid short circuiting the magnetism. Q is a striker-bar extending centrally between the magnet spools K and slidably engaging the flange M and non-magnetic bar P. R is an armature plate secured to the striker-bar Q and extending into proximity to the pole-pieces of the magnet. The armature R has an outwardly-extending portion R which is returnbent at B S is a resilient member clamped to the flange M of the Z-bar member and T is a cooperating member also clamped to said flange and insulated therefrom by suitable material U. The members S and T have cooperating contacts fixed thereon which operate as a cireuit interrupter.

In operation, when current is passed through the magnet coils the armature will be attracted, which will cause the strikerbar Q, to deliver a blow upon the bell. This operation will also cause the returnbent portion R of the armature to strike the member S, separating the contacts thereon and breaking the circuit. This in turn will deenergize the magnet and permit the striker and armature to drop by gravity to their normal position. The only parts which are actuated are the striker-bar and the armature, and as these are comparatively small in mass very little power is requlred.

To obtain the necessary length of the member S without increasing the height of the base the depressed portion is formed in said base, and furthermore this is apertured to permit the shank end of the vibrator to move inward thorethrough. Almost all of the parts. comprising the construction are made from stampings and the work of assembling these parts is quickly performed.

What I claim as my invention is:

1. In an electric bell, the combination of a base formed of pressed sheet-metal with an extension at one end thereof, a depression and a marginal flange extending therearound, a bell mounted on said extension, a U-shaped member forming a mounting for said bell and having an end portion thereof engaging a slot in said extension to prevent turning, an electro-magnet mounted in the depression, a striker slidable axially of said magnet, and an armature connected to said striker and extending in operative relation with the magnetic poles.

2. An electric bell, comprising a base formed of pressed sheet-metal with a substantially rectangular body portion having a depression centrally thereof and with an extension at one end of said body portion, a bell mounted at the end of said extension, an electro-magnet mounted in said depression, a striker arranged to move axially of said magnet, an armature secured to said striker and extending into operative relation to the poles of the magnet, a circuit-breaker extending through an aperture in the base,

and a flange for supporting said circuit breaker also extending through said aperture.

3. In a bell, a base member formed of pressed sheet-metal having a depression centrally thereof, a magnet comprising a Z- shaped member having the central portion thereof secured to the bottom of said recessed portion, magnetic core pieces secured to an upwardly-extending flange of said Z-member, a non-magnetic bridge between the opposite ends of said core members, a striker slidable in said flange and non-magnetic bridge, an armature rigidly mounted on said striker, and a circuit-breaker in operative relation to said striker.

4. In an electric bell, the combination with a pressed sheet-metal base member, of a magnet comprising a Z-shaped member, parallelly-arranged core members mounted on one flange of said Z-shaped member, a non-magnetic bridge between the opposite ends of said core members, a striker mounted in said non-magnetic bridge and flange of said Z-member, an armature mounted on said striker arranged outside of said nonmagnetic bridge, a returnbent flange on said armature, and a resilient circuit-breaker extending between said armature and the returnbent portion thereof, the opposite end of said circuit breaker passing through an aperture in said base and being secured to the opposite flange of said Z-member.

5. In an electric bell, a base formed of pressed sheet-metal having a marginal rearwardly-extending flange surrounding the same with laterallyprojecting perforated ears forming securing means, said base also having a depressed panel cut away at one point, an electro-magnet mounted on the depressed panel of said base, an armature for said magnet, and a resilient vibrator adjacent to said armature mounted in rear of said base and extending through the aperture in said depressed panel into operative relation to said armature.

6. In an electric bell, a base formed of pressed sheet-metal having a marginal rearwardly-extending flange thereabout with laterally extending perforated ears forming securing means therefor, said base having a depressed panel apertured at one point, an electro-magnet mounted on said depressed panel including a Zshaped member with the operative relation to the poles of the magnet, and a vibrator mounted on the rearwardly-extending portion of said Z-member and extending through said aperture into operative relation to said armature.

7. In an electric bell, the combination with a base formed of pressed sheet metal with an extension at one end thereof, of a bell mounted on said extensioma U-shaped member forming a mounting for said bell and having an end portion thereof engaging a slot in said extension to prevent turning, a striker in an operative relation to the bell, and electro-magnetic means for actuating the striker.

8. In an electric bell, the combination with a base member, of a magnet comprisin parallel core members, windings there or, a magnetic support for said core members engaging corresponding ends thereof, magnetic" bridge between the opposite ends of said core members, mounted in said bridge and support, an armature mounted on said striker arranged outside of said non-magnetic bridge, a returnbent flange on said armature, and a resilient L HOD:

a striker jointlycircuit-breaker extending between said are mature and the return-bent portion thereof, the opposite ends of said circuit-breaker passing through an aperture in the base and being secured therebeneath.

In testimony whereof I aflix my signature.

CARL J. SCHWARZE.

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

Washington, D. G."

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