US133269A - Improvement in door-bells - Google Patents

Description

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WITNESSES. T NNNNNN 05..

TJNITED SrArns AMOS L. SWAN, OF CHERRY VALLEY, NEW YORK.

IMPROVEMENT IN DOOR BELLS.

Specification forming part of Letters Patent No. 133,269, dated November 19, 1872.

' To all whom it may concern:

Beit known that I, Amos L. SWAN, of Cherry Valley, in the county of Otsego and State of New York, have invented a new and valuable Improvement in Door-Bell Alarms; and I do hereby declare that .the following is a full, clear,

and. exact description of the construction and operation of the same, reference being had to the annexed drawing making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawing is a representation of a partial sectional view of my invention.

My invention has relation to door-gongs; and consists in the hereinafter-described construction and novel arrangement of the bellpull, whereby the parts appertaining thereto are prevented from being injured by careless use, and in the construction and novel arran gement of the slotted swinging plate; the

notched tumbler and the swinging arm and stud constituting the striking mechanism, whereby two strokes are made wheneverthe bell-handle is drawn outand let go.

Referring to the drawing, A designates the door-jamb; B, the bell-handle or knob; O, the shank thereof D, a rod attached to said shank by means of a shackle, d, which allows the knob and shank to turn freely and without danger of injury. D is a platesecurcd to the jamb; D alever pivoted to said plate; D', a slotted flange formed on the end of the plate .D to let the lever D pass through; D, a

wire connecting said lever to the striking mechanism. E E represent a pair of toggles pivoted, respectively, to the plate DP and to the lever D The pin which connects said toggle together holds a block, F, to which is secured the rod D, as shown. When the bellhandle is pulled the toggle presses the lever.

D down and causes the wire 'D to be drawn down until the gong sounds an alarm. The

striking mechanismv allows the handle to be plate is moved in one direction by means of said wire and the bell-pull and in the other direction by means of the spring. This-plate has a loop, J, which works in notches in the cam h, and has a curved slot, K, which allows it to pass the cam-pivot. When the bellhandle is pulled the plate I is drawn down and the cam so turned, by the loop J acting against the outer lug t, as to communicate motion through the link H to the hammer and to raise the same. As soon as the cam has made a quarter revolution the spring L, which encircles the post m and acts upon the hammer and link H, causes the cam to complete the half revolution, and thereby enables the hammer to strike the bell once. When the bell-handle is let go the plate I rises, and the loop J, acting against the lug 'i of the cam, turns the cam backa quarter revolution, again raising the hammer until the loop passes the cam pivot, when the spring again acts and produces another stroke. The loop J is pivoted to the plate I, and has a finger on its end to catch the ears of the cam. This finger enters a notch at one side ot the slot K, and is therein allowed the requiredplay to move in a line with the cam. The slot K is designed to be of considerable length, so that the plate I may turn 011 its pivot, no matter how far out the bell handle is pulled, without straining any of the other devices. The block F is of a peculiar construction, having two communicating sockets bored through it, one to receive the end of the rod 1) and the other, which is inclined, to receive a. screw, f, by means of which said rod is tightened.

The rod is adjustable, and by loosening the screw may be lengthened or shortened, as desired, to regulate the stroke or movement of the bell-handle.

What I claim as my invention, and desire.to secure by Letters Patent, is V The pivoted tumbler h having the legs it, in combination with the swinging plate I having the slot K and pivoted arm J, the link H, spring L, hammer F, and gong F, substan tially as specified.

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

AMOS L. SWAN. Witnesses:

Guns. McLEAN, JOHN SHARP.

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