GB433379A - Improvements in apparatus for indicating the torque on a shaft - Google Patents

Abstract

433,379. Dynamometers; rotary transmission. GIBSON, J. H., 3, Central Buildings, Westminster, and MITCHELL BEARINGS, Ltd., Scotswood Road, South Benwell, Newcastle-on-Tyne. Feb. 14, 1934, No. 4880. [Class 106 (ii)] Relates to the type in which a disc or collar c is clamped to the shaft a and a sleeve b is clamped a measured distance therefrom the sleeve having a flange b<1> adjacent to the disc, and consists in connecting to the sleeve one or more cylinders d communicating with an indicating tube l and containing liquid and a piston or diaphragm e adapted to be displaced by a screw h or projecting element on the collar. In the form shown, the sleeve b and the collar c are each made in two halves which are bolted together. The piston e is constrained by a light spring to abut against the end of a screw h passing through a boss g on the collar c. The cylinders are connected by metal piping k, k<1> to the opposite ends of a glass capillary tube l. The cylinders and the tube contain a liquid the movement of which when the shaft twists is rendered visible by a plug m of mercury in the tube l. A scale, (not shown), is mounted in proximity to the tube l and is provided with a cursor fitted with an eye-piece and an electric sparking device which gives a spark during every revolution of the shaft. In a modification the tubes k, k' are fixed to the ends of a U- tube partly filled with liquid. This moves in opposite directions in the legs of the tube the distance between the free ends giving the required reading. In this form, the sleeve is conical and diaphragms are used instead of pistons.