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Publication numberUS359402 A
Publication typeGrant
Publication dateMar 15, 1887
Filing dateJun 17, 1880
Publication numberUS 359402 A, US 359402A, US-A-359402, US359402 A, US359402A
InventorsJacob Paff
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Loose-belt alarm
US 359402 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

(No Model.)



No. 359,402. Patented Mar. 15, 1887.





SPECIFICATION forming part of Letters Patent No. 359,402, dated March 15, 1887.

Application filed June 17, 1886. Serial No. 205,509. (No model) T0 or whom it may concern:

Be it known that I, J AOOB PAFF, of Amboy, in the county of Blue Earth and State of Minnesota, have invented a new and Improved Loose-Belt Alarm, of which the following is a specification, reference being bad to the annexed drawings, forming a part, in which Figure 1 is a side elevation, partly in section, of my improved loose-belt alarm applied to a pulley. Fig. 2 is a transverse section taken on line a: x in Fig. 1. 7

Similar letters of reference indicate corresponding parts in both figures of the drawings.

The object of my invention is to provide a simple and efficient alarm for indicating the slipping of a belt audibly.

My invention consists in the construction and arrangement of parts, as will be hereinafter fully described and claimed.

To the rim Aof a pulley is secured a frame, 13, in which is journaled a small friction-wheel, C, which projects through an aperture, a, in the rim of the pulley and slightly beyond the face of the pulley, so that it will touch the belt extending around the pulley. In the frame 13, near its inner end, is journaled a small rock-shaft, D, carrying an arm, I), which projects into the path of a pin, a, inserted in the side of the friction-wheel O. The shaft D also carries an arm, 1, having at its free extremity a bell-hammer, e. Aspring, f, surrounds the shaft D, and is attached at one end to the arm I) and at the other end to the frame B.

' To the inner end of the frame B is secured a gong, E, in position to be struck by the bellhammer 6; So long as the belt travels with the rim of the pulley the friction-wheel 0 remains stationary; but when the belt slips on the rim of the pulley it causes the frictionwheel 0 to rotate, bringing the pin 0 into engagement with the arm I), thus turning the shaft D so as to raise the hammer e, and when the pin 0 passes the end of the arm I) the spring f turns the shaft D, soas to carry the bellhammer e into contact with the rim of the gong E, sounding the alarm.

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

1. The combination, with a pulley, of a friction-wheel journaled on the same, with its periphery projecting beyond the periphery of the pulley, and an alarm, also mounted on the pulley and constructed to be operated by the said wheel, substantially as set forth.

2. The combination, with apulley having a slot in its periphery, of a wheel mounted on the pulley and projecting through said slot and having a pin 011 one side of the wheel, a bell on the pulley adjacent to said wheel, and a bell-hammer having an arm extending into the path of the said pin.

3. The combination, with a pulley having a slot in its periphery and .a frame secured to the rim under the slot, of a wheel journaled in the frame and provided with a pin on one side, a spring-operated rock-shaft, also journaled in said frame and provided with a bellhammer operated by the said pin, and a bell secured to said frame, substantially as set forth.

4l. The combination, with a pulley provided with an aperture, to, in the rim thereof, of a loose-belt alarm formed of the friction-wheel 0, provided with the pin 0, the rock-shaft D, armsb d, spring f, gongE, and the supportingframe B, substantially as shown and described.


W'itnesses: H. B. PERRIN, W. L. PERRIN.

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Cooperative ClassificationF16H55/36