Patent GB-452911-A (GB)
Title: Improvements in or relating to motor vehicles and in lifting and moving devices therefor
IPC: B60S9/14
Filed: 1936-04-16
Abstract: 452,911. Jacking and manoeuvring motor vehicles. BERMAN, S., 29, Oxford Street, London. April 16, 1936, No. 10975. Addition to 415,481. [Classes 79 (ii) and 79 (iii)] In the invention described in the parent Specification, the traversing wheels of the jacking system are driven from the gearbox lay shaft instead of from the propeller shaft. The lay shaft may also drive the pump for operating the jacks. The jacks may be connected in pairs, front and rear, and attached by brackets to the respective axles. Attached to the end of the gearbox 1 is a casing 2 through which the main gearbox shaft 3 passes and into which the end of the layshaft 4 extends to transmit the drive through a bevel pinion 5 in mesh with gears 6, 7 mounted in bearings 61, 71. A shaft 11, mounted in an extension 16 of the casing, is adapted to be clutched to either of the bevel gears 6, 7 and transmits the drive through a coupling 18 to a sleeve 22 carrying a worm 24 driving a wormwheel 25 secured on a transverse shaft 26 the ends 261, 262, of which protrude through the casing and are respectively connected by shafting to the traversing rollers of the front and rear jacks. The coupling 18 is adapted to yield under overstrain, being composed of a sleeve 18 slidably keyed to the shaft 11 and pressed by a spring 19 so that rounded teeth 20 on the end thereof engage corresponding teeth 21 on the end of the sleeve 22, the spring 19 abutting against a fixed collar 17 on the shaft 11 and being housed in a shell 23 attached thereto. The clutch sleeve 10 for connecting the shaft 11 to either of the gears 6, 7 is operated by a yoke 28 secured to a plunger rod 29 controlled from the driver's seat by Bowden mechanism 31 in opposition to a spring 30, the operative positions being maintained by a spring-pressed ball 33 engaging grooves 32. The hub of the bevel gear 6 is extended into a shaft 34 adapted to be coupled by a dog-clutch 36 to pump gears 39, 40, the clutch being pressed into engagement by a spring 42 acting on a lever fork 43 when a tension wire 41 is released. The wire 41 is operated from the driver's seat and the controls are inter-related so that the pump can only be operated when the clutch 10 and the vehicle gear are in neutral and the latter can only be operated when the pump clutch 36 is disengaged. The four jacks of the vehicle are arranged in front and rear pairs, each comprising a transverse frame 50 carrying the outer cylinders 51 of the jacks, a steering wheel 62 being mounted at one end and a traversing wheel 65 at the other end of the frame. The traversing wheel 65, Fig. 6, is mounted in ball bearings between side plates 68, 69 and is connected to its drive shaft by encased gears 81, 82. The steering wheel 62 is also mounted in ball bearings in a rotatable fork member 63 provided with means 64 for coupling the front and rear steering wheels together by a link connection. The upper cylinders 52 of the jacks are attached to the axles by brackets 71, Fig. 8, the jacks being extended by fluid admitted through a passage 53 and retracted by fluid admitted through a passage 54, control being effected by a valve interlocked with the other controls. Brakes may be provided on the jack wheels or on the shaft 26 as indicated at 86, Fig. 3.