GB270756A - Improvements in or relating to centrifugal clutches - Google Patents

Abstract

270,756. Goudet, H. F. J. May 10, 1926, [Convention date]. Clutches, friction, for squirrel-cage induction motors &c. comprise two centrifugally - actuated clutches in series, one engaged on rotation of the driving-shaft and the other on rotation of the driven part. A member 2, Fig. 1, on the driving-shaft 1 carries on pivoted arms 3 spring-retracted shoes 5, adapted to engage a groove 10 in the driven pulley 7, which carries on pivoted arms 11 spring-retracted shoes 14, adapted to engage a groove 15 in the member 2. The parts may be so designed that the shoes 5 are capable of transmitting the normal torque. In a modification, the member 2, Fig. 2, on the driving-shaft 1 carries segmental shoes 5, guided by central slots on radial vanes 17 and adapted to engage a surface 10 on the driven pulley 7, which carries on radial vanes 16, extending from an end-plate 18, preferably identical shoes 14 to engage a surface 15 on the member 2, the use of retracting-springs being optional. The shoes 5, 14 are preferably composed of a variable number of independent laminations, to provide adjustability and facilitate uniformity of engaging-pressure. Relative adjustment of the sets of shoes 5, 14 may also be effected by making them of materials of different density, or by drilling holes in one set. Cooling- air may be centrifugally circulated in the parts 19-21 and 20-22. The Specification, as open to inspection under Sect. 91 (3) (a), comprises also a statement that the subdivided shoes and internal ventilation system are applicable to other clutches. This subject-matter does not appear in the Specification as accepted.