Improved Construction of Apparatus for Braking or Spragging Mining Trams, Street Trams, Road, and other Vehicles.

摘要

6159. Noel, J. A. March 11. [Addition to 23,155/08.] Locking by frictional detents.-Mining and street trams, and road and other vehicles of the kind described in the parent Specification are provided with wheel-locking brakes operated by centrifugal action or by hand. As shown, the catch H on the wheel, when moved outwards under centrifugal action, strikes a projection 7 on the brake device and causes one or other of the brake blocks 4 to turn about the pivot 8 until the line through the centres 11, 8 is passed. During this movement the internal springs 5 are compressed until the line of centres 11, 8 is passed, when the springs are somewhat released. A spring-pressed pawl 15 locks the device off, and a handle 12 enables it to be operated manually. Instead of providing one spring for each brake block, a single spring may be arranged to act on both blocks. By arranging four blocks on the brake device, two adjacent wheels may be braked at each side of the vehicle. The device may have claws engaging the sides of the wheel so as to ensure the blocks always being in the plane of the wheel. The catches H may be spring- controlled to cause them to act together.