US717626A - Alarm-bell. - Google Patents

Description

No. 717,626. r PATENTED JAN. 6, 1903.

' J. 0. SGHLEIGHER.

ALARM BELL.

APPLIGATION FILED 00113, 1902.

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UNITED- STATES ATENT OFFICE.

JOHN G. SOHLEIOHER, OF MOUNT VERNON, NEW YORK, ASSIGNOR TO JOSEPH A. BRITTON, OF NEW YORK, N. Y.

ALARM-BELL.

SPECIFICATION forming part of Letters Patent No. 717,626, dated January 6, 1903.

' Application filed October 13,1902. Serial in. 126,997. (No model.)

To all whom it may concern:

Be it known that L JO HN G. SoriLEIoHER, a citizen of the United States, and a resident of Mount Vernon, in the county of Westchester and State of. New York, have. invented certain new and useful Improvements in Alarm- Bells, of which the following is a specification.

My invention relates to bells, and especially to those provided with means whereby they may be operated and caused to give an alarm when a door, window, or other movable object is brought in contact with said means. Its objects are, among others, to produce a device of this character of strong and durable construction and certainty of action and of such simple and compact form as to be easily carried about on the person.

To these ends it consists of the combination of parts and arrangements of details hereinafter described and claimed, and illustrated in the accompanying drawings, forming a part hereof.

, In the said drawings, Figure 1 is a vertical medial section of a bell attached to an actuating device, which is shown in perspective. Fig. 2 is a horizontal'section of the bell immediately below the plane of the plate H of Fig. 1 with the tripping-lever shown in full. Fig. 3 is a like view taken immediately beneath the plane of the plate J. Fig. 4 is a side view showing detached portions of a modified construction of certain parts. 5 is a plan view of the spring disk P.

The bell proper and coverA of the bell has a central boss A, having a threaded aperture adapted to receive the threaded upper end B of the bolt B. This threaded portion is of lesser diameter than the remainder of the bolt, and on the shoulder at the point where the thread commences rests the rotatable spring-disk P, which is held firmly between said shoulder and the boss A. The mainspring D is suspended beneath the plate J by means of the bolt 13, to which one of its ends is secured, and is confined within the arms E, hung upon the sleeve G surrounding said bolt, the opposite end of the spring being secured to one of the depending ends E of said arms. The bolt B is rotatably mounted in the plates J and H and has a ratchet F fixed Fig.

near its upper end, which is adapted to be engaged by the spring-pawl F, secured to the under side of the plateH. To this plate 11 the upper ends of the posts upon which the gear-Wheels are mounted are secured, and the lower ends are set in the plate or partition J.

The following chain of gear-wheels connects the spring D with the star-wheel S and the escapement N on the end of the clapper-arm N A large wheel G, mounted on the bolt or shaft B, meshes with the pinion G, mounted on the post G The wheel G fixed to said pinion, meshes with the pinion G on the post G and the wheel G fixed to the pinion G in turn meshes with the pinion G on the post G and thus actuates the star-wheel S, which is mounted on the same post and fixed to said pinion. The clapper-arm N has a pivot N and is oscillated bynieans of the es capernent N engaging with said star-wheel S and the clapper or hammer N on the opposite end thus caused to strike the bell A.

The tripping-lever 0 extends through the opening 0 in the lower casing O of the bell and is pivoted to the pivot-support J, formed by turning up a small portion at the edge of the plate or partition J. A pivot-pin 0 passes through the said lever, and the ends of the pivot-support are upset or turned around said pivot. The said pivot-support is mortised out to allow the passage of the lever therethrough. The upper end 0 of the lever is bent over and passes underneath the edge of the spring-disk P, which presses upon the said upper end and holds the lever in its normal position. When the lower end of the lever is depressed, it will raise the upper end against the resistance of the spring-disk P, and as soon as the pressure on the lower end of the lever is removed the said spring-disk will return the lever to its position. The

clapper-arm N has a medial upwardly-bent portion of approximately U shape, which brings it into contact with the upper portion of the lever 0. It will be seen that the lever O is held in contact with the clapper-arm N by the spring-disk P andthat when the lower end of the lever is depressed the said clapper is released and the ringing of the bell thus accomplished.

The base L is provided with a bottom plate or shoe M, having its rear end turned downwardly to form a claw M and its forward end turned downwardly and pointed at the edges to form claws M The central portion at the forward edge of the shoe is turned around the pintle R The lower ends of the spring-plate R are also turned around this pintle, the central portion at this point being cut out to make room for the turned portion M of the shoe. A hinge is thus formed for the plate R. The bell is mounted upon the base L by means of the bracket K, bolted thereto, to which the casing O is rivetedor otherwise secured, and the portion of the base adjacent to the bell is cut out to make room for the same. The forward upper surface of the base L is inclined in the direction opposite the bell, and the spring-plate R is normally inclined at a slightly-greater angle and extends over the said upper surface of the base. It will be apparent that when the lower point of the base is placed in the path of a door, window, or the like, so that when the same is opened its edge will come in contact with the spring-plate R, the said springplate will be depressed and will cause the lever 0 to release the bell-clapper, thus sounding the alarm. The upturned portion R at the upper end of the spring-plate R is adapted to check the opening of the said door, window, or the like when it reaches that point,if the same has not already been checked by contact with the uppersurface of the base, which acts as a Wedge.

In Fig. 4 I have shown a modification by which the spring-plate R is dispensed with and the lever 0 extended downwardly over the inclined upper surface of the base L. In this construction I provide an upwardly-bent portion 0 which answers the purpose of the portion R of the spring-plate, and the extended portion 0 of the lever terminates in the downwardly-turned portion 0 within the slot L near the lower forward end of the base. It will be apparent that the lever will thus be given the desired motion by the opening of the door.

The winding of the spring is accomplished in the usual manner namely, by rotating the bell, which in turn rotates the shaft or bolt B, secured to the center of' the spring. After the spring has been wound and the clapper released the post B remains stationary, while the arms E revolve with the unwinding of the spring, thus turning the sleeve G surrounding the bolt B, to which the said arms are fixed, and to the upper end of which the large gear-wheel G is also affixed.

What I claim is- 1. Thecombinationofabell,strikingmechanism inclosed therein comprisinga vibratory clapper, a spring and multiplying-gear between said spring and clapper whereby the same is operated, a lower casing inclosing a portion of the said mechanism, an arm extending through said casing having a portion inside the bell adjacent to the clapper, and a circular spring-plate in the upper part of the bell secured centrally at the center of said bell and extending in all directions a distance equal to the distance of said arm from said center, adapted to bear down upon the upper end of said arm and hold it normally in contact with the clapper.

2. The combination of a bell, striking mechanism inclosed therein comprisinga vibratory clapper, a spring and multiplying-gear between said spring and clapper whereby the same is operated, a lower casing inclosing a portion of the said mechanism, an arm ex: tending through said casing having a portion inside the bell adjacent to the clapper, and a revoluble spring-plate in the upper part of the bell secured centrally at the center of said bell and extending in all directions a distance equal to the distance of said arm from said center, adapted to bear down upon the upper end of said arm and hold it normally in contact with the clapper.

3. The combination of a bell rotatably mounted, striking mechanism inclosed therein comprising a vibratory clapper, a spring and multiplying-gear between said spring and clapper whereby the same is operated, a lower casing inclosing a portion of the said mechanism, an arm extending through said casing having a portion inside the bell adjacent to the clapper, and a circular spring-plate in the upper part of the bell secured centrally at the center of said bell and extending in all directions a distance equal to the distance of said arm from said center, adapted to bear down upon the upper end of said arm and hold it normally in contact with the clapper.

4:. The combination of a bell, striking mechanism inclosed therein comprising a vibratory clapper, a spring and multiplying-gear between said spring and clapper whereby the same is operated, a lower casing inclosing a portion of the said mechanism, an arm extending through said casing havinga portion inside the bell adjacent to the clapper and a circular spring-plate in the upper part of the bell secured centrally at the center of said bell and extending in all directions a distance equal to the distance of said arm from said center, adapted to bear down upon the upper end of said arm and hold it normally in contact with said clapper, an extended portion of said arm, a base upon which the bell is mounted, and an inclined surface on said base over which the arm'extends.

5. The combination ofabell,striking mechanisminclosed therein,comprisingavibratory clapper, a spring and multiplying-gear between said spring and clapper whereby the same is operated, a lower casing inclosing a portion of the said mechanism, an arm extending through said casing having a portion inside the bell adjacent to the clapper and a circular spring-plate in the upper part of the bell secured centrally at the center of said bell and extending in all directions a distance equal to the distance of said arm from said IIO center, adapted to hear down upon the upper end of said arm and hold it normally in contact With said clapper, an extended portion of said arm, a base upon-which the bell is mounted, an inclined surface on said base over which the arm extends and a slot in said base adapted to receive the outer free end of said arm.

6. The combination of a circular bell, a

clamp and actuating means inclosed by the same, a lower casing, a diaphragm closing the upper part of said casing, an opening in said casing and an upturned portion of the diaphragm adjacent to said opening, a tripping arm or lever pivoted to said upturned portion JOHN C. SCHLEICHER.

Witnesses:

HERMAN MEYER, S. S. NEWTON.

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