GB707999A - Improvements in or relating to friction clutches - Google Patents

Abstract

707,999. Lubricating. BRITISH INSULATED CALLENDER'S CABLES, Ltd. April 8, 1952 [April 9, 1951], No. 8205/51. Class 12(3) [Also in Group XXIV] A rotary friction clutch comprises driving and driven members disposed between a pair of concentric chambers, the outer 'of which is of toroidal form and is in communication with the external edges of the driving faces and the inner of which may also be of toroidal form and is in communication with the inner edges of the driving faces, means being provided for scooping liquid lubricant from the outer to the inner chamber where, under operating conditions, it is carried by centrifugal force to and past the driving faces into the outer chamber. The outer toroidal chamber may be stationary and have an annular opening into which project the clutch members, or, as shown, it (22) may be constructed as part of one of the clutch members, in this case the driven clutch member 9. The driving clutch member 4 is axially slidable upon but keyed for rotation with a driving shaft 1 on which the driven member 9 is freely rotatable, the clutch being suitable for use with a continuous vulcanizing machine for the production of rubber sheathed flexible electric cable, for which puroose it is continuously slipped, the clutch engaging force being controlled by an external stationary diaphragm fluid chamber, as described in Specification 707,998, [Group XXIV]. Lubricant 31 is provided in the outer toroidal chamber 22 and is retained therein by a spring sheet metal or neoprene annulus 23, the driving clutch member being provided with scoops 25 in the form of bent tubes which, on relative rotation between the two clutch parts, transmit this oil through passages 26, 27 to an inner chamber 30. The driving member 4 is provided with a friction facing 7 which may have channels 32 to facilitate the passage of the oil from the inner to the outer chamber under the action of centrifugal force.