US377539A

US377539A - William p

Info

Publication number: US377539A
Authority: US
Publication date: 1888-02-07
Anticipated expiration: 1905-02-07

Description

(No Model.)

NOQ 377,539.

W. P. STOOKER ELBGTRIO BELL.

Patented Feb. 7, 1883,

ATTORNEYS.

UNITED STATES PATENT OFFICE.

WVILLIAM F. STOOKER, OF EUREKA, KANSAS, ASSIGNOR TO WILLIAM H.

BYERS, OF SAME PLACE.

ELECTRIC BELL.

SPECIFICATION forming part of Letters Patent No. 377,539, dated February '7. 1888.

Applicationfiled March 7, 1887. Serial No. 229,962. (No model.)

To-aZZ whom it may concern.-

Be itknown that I, WILLIAM F. STOOKER, of Eureka, in the county of Greenwood and State of Kansas, haveinvented a new'and Improved Electric Bell, of which the following is a specification, reference being had to the annexed drawings, forming a part thereof, in which Figure 1 is a side elevation of my improved electric bell. Fig. 2 is a vertical section taken on line .70 min Fig. 1. Fig. 3 is a vertical transverse section of the end of the armature-lever, taken on line 3/ y in Fig. 2. Fig. 4 is a side elevation of the bushing fitting the armaturelever. Fig. 5 is a plan view of a portion of the forward end of the armatu re-lever, showing the cross-arms; and Fig. 6 is a plan view of 'the yoke of one of the electromagnetic armatures.

Similar letters of reference indicate corre sponding parts in all the views.

The object of my invention is to construct an electromagnetic bell in which a long stroke of the bell-hammer may be secured, so as to produce an effective alarm without the em ployment of spring or weight actuated mechanism.

My invention consists in the combination, with the bell-hammer lever, of one or more electromagnetic armatures and oneor more helices adapted to receive within their coils the electromagnetic armatures, either the armatures or the helices being carried by the bell-hammer lever.

To the base A, near one end, is secured the U-shaped frame B,provided with a right-angled arm, 0, and having a double offset branch, D, near the base thereof,provided with crossbars a 6. Near the opposite end of the frame is secured a standard, F, which supports a bell, G, in suitable position to be operated by the electro-magnetic mechanism.

In the frame Bareinserted screws a, forming the pivots of the armature-lever E. One end of the armature-lever E projects forward to a point underneath the bell G, and is provided with a hammer, H. The hammer end of the armature-lever is reduced in thickness, to allow it to spring forward and strike the bell after the movement of the body of the lever is arrested by the limiting'screw d,inserted in the bar a of the arm D. The downward motion of the hammer end of the lever E is limited by a screw, 6, inserted in the cross-bar b. The end of the armature-lever opposite that to which the hammer H is applied is provided with-a bearing, f, for the bushing g, (shown in detail in Fig. 4,) and the said bushing is held in place in the hearing by a cap,h, secured to the arma ture-lever by screws 2.

In the bushing gis received the rounded the armature-lever,andenter a short distance into the bore of the helices L, in position to be acted upon by the helices when energized by an electric current.

To the armature-lever E, at the opposite side of the fulcrum of the said lever,is connected a pair of cores, J,similar to the cores J, already described. The cores J are attached to an ironyoke, I, and are bored transversely and received on trunnions formed on the ends of a non-magnetic cross-arm,-k, formed on or carried by the armature-lever.

To the arm 0 of the frame B is secured. an iron plate, j, to which are attached two helices, L, which are similar in connection and arrangement to the helices L, already described. The cores J are provided with bobbins K,and

normally enter a short distance into the bore of the helices in position to be acted upon by the magnetism developed in the helices when they-are subjected to'the action of an electric current.

To the armature-lever E,near its fulcrum,is

secured one end of a spiral spring, Z, the oppo site end of which is connected with a thread wound around the spindle M,passing through the arm 'D. The spring serves to quicken the retrograde movement of the hammer, so that the strokes of the bell may be repeated in quick succession. The current from. any source of electricity, entering the bell by the bindingpost m,is conveyed to the helices L by the wire n, and from the helices L by a spiral wire, 0, to the bobbins K on the cores J, and the bobbins K are connected electrically with the helices L by the spiral wirep. The current finally returns to the remaining binding post, m, by a spiral wire, (1,. the bobbin K, and the wire r.

The helices L and the bobbins K are wound in opposite directions, so as to produce in the helices and in the cores J poles of opposite name, to secure the drawing of the cores J into the helices L. In like manner the helices L and bobbins K are wound in opposite directions, so as to secure the drawing of the cores J into the helices L.

As my improved bell is designed for heavy work-such as railroad-signaling, fire and burg lar alarms it is desirable to place it in the local circuit provided with a strong battery, and operate the local circuit by means of a relay. As the relay and local-circuit connections are of the ordinary kin-lit will be unnecessary to enter into a detailed description of them. By providing along stroke of the electro-magnet or polarized armature I am enabled to secure a powerful blow of the ham mer upon the bell.

Should it be desired to produce double strokes on the bell, a forked armature-lever will be employed,carrying two hammers, one upon either side of the bell. If desirable, the

ordinary Vibratory attachment may be applied to the armature-lever, so as to secure repeated strokes of the hammer upon the bell during the time contact is formed by thekey by which the alarm is sent.

Having thus fully described myinvention, I elaim'as new and desire to secure by Letters Patent- 1. In an electric bell, the combination, with the bell-hammer-operating meehanism,of helices mounted on a plate of magnetic material, electromagnetic armatures axiallyin line with the helices and adapted to enter the helices, and the electric connections whereby the polarity of the helices and of the armatures are rendered opposite, substantially as described.

2. In an electric bell, the combination, with the armature-lever E, provided with the bear ingf and cap h, of the bushing g, the iron yoke I, provided with the cylindrical central portion fitted to the bushing g, the cores J ,attached to the yoke I, the bobbins K, carried by the cores J, the helices L, adapted to receive the ends of the cores J, and the iron plate j, substantially as described.

3. In an electric bell, the combination, with the armature'lever E, of the base A, the frame B, provided with the arms 0 D, the limiting screws (1 e, the retractile spring Z, the oppositely-arranged helices L L, the eleet-ro-magnetic cores J J, the bobbins K K, and the electrical connections, substantially as described.

IVILLIAM F. STOCKER.

Witnesses:

FRANK P. COGSWELL, J. \V. EELLS.