US293626A - Electric bell-pull - Google Patents

Description

U ITED STATES PATENT. OFFICE.

' AUGUSTUS s. BUNKER, or LAWRENCE, MASSACHUSETTS.

ELECTRIC BELL-PULL.

SPECIFICATION formingpart of Letters Patent No. 293,626, dated February 19, 1884;

- Application filed November 26, 1883. (No model.)

3'0 all whom it may concern:

Be it known that I, AUGUSTUS S. BUNKER, a citizen of the United States, residing at Lawrence,in the county of Essex and State of Mas sachusetts, have invented certain new and useful Improvements in Electric Bell-Pulls; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part .of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a side elevation of my invention, and Fig. 2 a longitudinal section thereof.

The present invention has relation to certain new and useful improvements in electric bellpulls; and the object thereof is to simplify this class of devices, whereby they will be less liable to get out of order, will work more easily, and may be manufactured and placed on the market at a comparatively small cost. These several objects I attain by the construction substantially as shown in the drawings and hereinafter described and claimed.

In the accompanying drawings, A represents the spindle, provided at its outer end with a suitable knob, a, or other equivalent device, for operating the spindle to pull it out in the direction of the arrows, Fig. 2. The spindle A extends through a casing, B, cast with a circumferential flange, b, with holes through it to receive screws, by which it is attached to the j amb of the door or other obj ect. Located within the casing B, and coiled around the spindle A, is aspiral spring, 0, re-

tained in position on the spindle by a pin, d, passing through the same. at a point beyond the inner end of the casing. Thus when the spindle is pulled out the spiral spring will be contracted between the pin and outer end of the casing, and when the knob isreleased the expansive force of the spring will cause the spindle to return to its normal position. The

inner end of the spindle A is screw-threaded to receive and hold thereon a button, 0, having its inner end conical or beveled, as shown at f. To more securely retain saidbutton in position on the spindle, I employ a jam-nut, e, screwed on the extremity of the spindle until it comes in contact with the end of the button, said nut being preferably round and of the same diameter as the button. The button 0 is both removable and adjustable on the spindle A, to adapt it to a shorter or longer pull. Around the inner end of the sleeve or casing B is placed and secured an insulator, D, and to this insulator are connected the ends of spring-arms E, of metal, and bent outward at an acute angle at their free ends, as shown at g, to conform to the bevel or conical surface of the button 0, so that when the spindle A is pulled in an outward direction the bevel surface, of the button will allow the angular ends of the spring-arms E to ride over it, and thus more perfectly make communication with the conducting-wires F, to complete the circuit with the battery and cause the bell to ring. The employment of the casing B completely shields the spiral spring 0, and prevents it from injury, as well as from the dust and dirt that would work in between the coils thereof.

The casing B has a further advantage, in that 4 .Hence space is economized between the escutcheon or flange and the knob, and the spin dle being round instead of square, as is also the beveled button, the spindle can be readily turned upon its axis without affecting its operation, the button always being in position. to

be brought in contact with the spring-arms when the spindle is pulled out. The interior or inner face of the knoba is made beveled, so that but a single point around the spindlewill come in contact with the end of the casing, thereby leaving a sufficient space between the door-jamb and knob to enable the fingers to grasp the latter in pulling the bell, thus dispensing with the usual neck or flange upon ,the inner side of the knob, and, as before stated, economizing space and enabling the' device to be connected to do'or-jambs of less thickness.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An electric bell-pull consisting of a casing east with a circumferential flange, a spring and spindle constructed substantially as described, and an insulator adapted to fit over the end of the casing, substantially as and for the purpose set forth.

2. In an electric bell-pull, the combination, with a suitable casing and an insulator fitting over the end of the same, of a spindle having at one end detachably connected a beveled button, and at its opposite end a button formed with a conical or beveled inner face, snbstantia-lly as and for the purpose set forth.

3. An electric bell-pull consisting of a cas-- ing cast with a circumferential flange or escutcheon and having connected to its inner end an insulator provided with curved or bent spring-arms and conducting-wires, and a spindle extending through the casing and insulator, and having a spiral spring coiled around it, and provided at one end with a button formed with a conical or beveled face, and at the opposite end with a knob beveled outward upon its inner side from its center of axis, substantially as and for the purpose described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

AUGUSTUS S. BUNKER.

Vitnesses:

JOHN E. BARR,

ALMERIN S. Coon.

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