US1053111A - Electric bell. - Google Patents

Description

W. E. RUSSELL.

' ELECTRIC BELL.

APPLICATION FILED APR. 28, 1909.

1,053, 1 1 1 Patented Feb. 11, 1913.

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\VITNESSES INVENTOR W. E. RUSSELL.-

ELEGTRIG BELL. APPLICATION FILED AER. 2s, 19o9.

1,05 3,1 1 1 Patented Feb. 11, 1913.

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WILLIAM EDWIN RUSSELL, OF DANBURY, CONNECTICUT.

ELECTRIC BELL.

To all whom, it may concern Be it known that I VVILLIAM EDWIN RUS- SELL, a citizen of the United States, and resident of Danbury, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Electric Bells, of which the following is a specification.

This invention relates to new and useful improvements in electric bells and has for its object to produce a novel and eflicient device of this kind which will be lighter in weight and neater in appearance than most of the bells of this class now to be found upon the market; and further to design the bell in a way which will inclose the operative mechanism beneath the bell proper, and without the necessity of providing a cover or box therefor; to apply to electric bells of. this general class a special form of magnet the armature of which is located close to the magnet and is inclosed and sealed so as to positively*prevent dust and bugs from getting therein and in a way to produce improved results.

l/Vith the above and other minor objects in view my invention resides and consists in the novel construction and combination of parts shown upon the accompanying two sheets of drawings forming a part of this specification upon which the several characters of reference denote like or corresponding parts throughout the several figures and of which,

Figure 1, shows a front elevation of my improved electric bell complete. Fig. 2, is a similar front elevation but with the gong removed. Fig. 3, is a central vertical longitudinal section through the bell including the magnet for operating the same. Fig. 4, is a detached plan view of the striking mechanism shown in Fig. 2. Figs. 5 and 6, show a front and side elevation respectively of a modified form of my improved bell as mounted upon a sheet metal or skeleton base, and Fig. 7, shows a plan view with gong removed of a further modified form of my invention.

Referring in detail to the characters of reference marked upon the drawings, and more particularly to Sheet 1, 10 indicates a base which is preferably constructed of cast metal and of a size and shape to be covered by the usual design of ong 30 as used in connection with electric ells. The said base comprises an annular rim portion Specification of Letters Patent.

Application filed April 28, 1909.

Patented Feb. 11,1913.

Serial No. 482,764.

11 having an intermediate bottom 12 whereby a pocket so to speak, is formed intermediate of such rim both above and below the said bottom. The base is further provided with suitable holes for the attachment of the several parts, the central hole of which is indicated by 13 and is provided with a bushing 14 (Fig. This insulating bushing 14 serves to support the central bell post 15 which is secured to the base by means of a screw 17. The gong 80 is pro-- vided with a reduced threaded end for the engagement of a nut 16 riveted to the said gong as shown. A sheet metal strip 18 is seated intermediate of the said post and its insulation and extends to one side where it is connected by screw 19 with the binding nuts 20 and whereby a field wire 21 may be attached. This screw like the screw 17 is insulated from the base by means of a hard rubber sleeve 23.

2 1 indicates a magnet which is inclosed within a suitable sheet metal shell 25 which forms a part of the magnet and said magnet further includes a central core 26 having an extended reduced end 27 that engages a cor responding hole in the upper annular flange of the base for the attachment of the magnet. This extension may be secured to the base in any suitable way as by means of,

threading or riveting as shown. A reciprocating brass rod 26 is mounted within the hollow core and upon its end is provided a round armature 28 which is arranged very close to the magnet and thus requires less battery to operate it than is commonly employed. This armature is inclosed by a cap 29 that snugly fits over the shell of the magnet and is sealed so as to protect the armature from dust, bugs or injury thereby again insuring a free and easy operation of the bell at all times.

The hammer 31 for striking the gong 3O is mounted upon a short piece of spring wire which in turn is attached to a rocker post 32 the reduced end portion of which is operatively mounted in a bushing 40 secured in a suitable hole of the base 10. 35 indicates a spring piece which is also attached to the said rocker post and has its outer free end bearing against a post 33 secured to the base in a way to normally hold the hammer away from the gong and the armature away from the magnet. A pin 34: is connected to the opposite side of the rocker post from the hammer and engages a slot in the inner end-of the reciprocating brass rod 26 so as to insure a rocker movement of the post with the reciprocating movement of the rod, as produced by the vibrations of the armature upon the head of the magnet. The intermediate portion of the spring 35 contacts with an adjustable screw 36 in the bell post 15 which latter is electrically connected with the field wire 21 before mentioned. The rocker post is loosely mounted in the bushing of the base as before mentioned, and can consequently be easily detached, carrying therewith its connect-ed parts as for instance the hammer, springs, pins, etc., in a manner to be easily assembled or disassembled or readily adjusted for repairs as occasion may require.

37 represents a second binding post upon the underside of the base and to which the second field wire 38 may be connected. 39 represents an insulating wire connecting the said post 37 and the magnet 24.

It will be seen from the foregoing that when the circuit is closed as by the connection of the wires 21 and 38 the magnet becomes charged in a way to influence the armature, and therefore by reason of the breaking contact spring connection with the post, a rapid reciprocating movement of the armature upon the head of the magnet is produced thereby causing the connection of the spring and post to be alternately made and broken and the hammer to strike the gong in rapid succession, producing an alarm of the usual character.

In the construction shown in Figs. 5 and 6, it will be seen that the operative parts of the gong for all practical purposes are similar to those shown in the preceding figures and that the little difference that exists resides principally in the form of the base to which the gong, magnet and other parts are attached. This base which we will designate as 41 is struck up from sheetmetal and is provided with screw holes 4-2 for its attachment to a side wall or other location. It is provided with an attached bell post 15 as in the other form and to which the gong 30 is connected. Its rocker post 32 is provided with parts substantially similar to those in the preceding figures and is operated through the medium of the magnet as previously described.

In Fig. 7, I have again shown another slight modification which includes a form of bell wherein my novel form of magnet is mounted within the gong of the bell and whereby the magnet as well as the other operative device practically within the space required for the gong alone. \Vhile the respective operative parts are arranged slightly different within this form of bell from that shown in the preceding figures yet it will be noticed that they are all present, and operate in identically the same manner as heretofore explained.

Having thus described my invention what I claim and desire to secure by Letters Patent is 1. An electric bell of the class described, the same comprising a base, a magnet attached thereto having a hollow core, a central rod slidably mounted within the core and bearing an armature upon one end to be operated by the magnet, a rocker post pivotally mounted within the base, a pin secured to the post and pivotally connected to the rod of the magnet, a hammer carried by the rocker post and a spring for normally holding the armature off from the magnet substantially as described.

2. In an electric bell of the class described, the combination with a base including an annular flange having a hole therethrough, a magnet having a central core extended to enter the hole of the flange, a reciprocating rod extended through the core, an armature mounted upon one end of the rod, a gong, a hammer pivotally connected to the base and loosely connected to armature rod to strike the gong, a metal shell inclosing the magnet, and a metal cap for inclosing the said armature. 7

Signed at Danbury, in the county of Fairfield, and State of Connecticut this 21st day of April, A. D., 1909.

WILLIAM EDWIN RUSSELL.

\ Witnesses:

EBER A. HODGE,

W. EARL RUssELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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