| 摘要 |
1,174,633. Clutch and brake combinations; electromagnetic disc brakes. BENDIX CORP. 8 May, 1967 [9 May, 1966], No. 21290/67. Headings F2E and F2L. An electromagnetic clutch and brake combination, for use in a copying machine where a single shaft is used to power and brake a roller containing printing paper, comprises an armature member 20 slidably splined on a support shaft 26 and having friction surfaces 22, 39 engageable with clutch and brake surfaces 24, 41 formed on a clutch member 16 provided with an input sprocket 18 and on a stationary brake member 42. Both the clutch and brake members 16, 42 are rotatably mounted on bearing surfaces of the support shaft 26, which is of synthetic plastics material having low friction characteristics and low moisture absorption properties. A spring 37 reacting against a shoulder of the support shaft urges the brake surfaces 39, 41 into engagement when a magnet coil 17 is de-energized The coil 17 is non rotatable and mounted by way of a plastics bearing sleeve 60 on the clutch member 16, the magnet body member 14 being fast with a housing 12 having an arm 46 extending into a slot 44 in the brake member 42. The combination forms a unit and the support shaft 26 can be slid on to a power shaft 28 of the copying machine, a facial slot 36 in the support engaging a pin 38 in the power shaft, and the support shaft being retained on the shaft 28 by a locking ring 52. The brake member is held stationary by a pin 48 extending from the machine frame into the slot 44. |
