A Servo-motor Without Speed-reduction Gear
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A Résumé of Patent Specifications that Have Recently Been Published
AMECHANICAL servo-motor for incorporation in the transmission shaft of a vehicle is disclosed in patent No. 476,559 by G. G. Gates and Automotive Products Co., Ltd., Brock House, Langham Street, London, W.1. The special point of the design is that no speed-reduction gear is needed, • the moving parts being
small enough to prevent overheating when not in use.
The drawing shows the propeller shaft of the vehicle passing centrally through the device, and carrying special splines for the reception of a set of revolving clutch plates (7). These are engaged by a second set (6), carried on pins (3) attached to a semi-rotary member (5). 'A groove (4) is provided for the reception of a chain (not shown) which is anchored in the groove and passes out of the casing to the brake rigging.
The device is Pet in operation by a small hydraulic piston (1) which moves a fork (2) and presses the clutch plates into contact. The partial rotation of member 5 transmits a pull to the chain which passes it on to the brake mechanism. The chain is arranged to tighten in either direction.
Stabilizer for Tippers.
WITH tipping bodies, pivoted near the rear of the vehicle, there is sometimes a tendency, when in the uppermost position, for the body to slew over sideways, especially with heavy loads on uneven ground. The prevention of this forms the subject of patent No. 476,402, by G. J. Rackham and the Associated Equipment Co., Ltd., of Southall, Middlesex.
The accompanying drawing shows a plan of the chassis, the position of the body being shown in dotted lines. The body is pivoted about the centre of brackets (1) and is lifted by a pair of hydraulic rams (2). The stabilizing device comprises a triangulated linkage pivoted on chassis brackets (3) and attached to a sliding shoe at the other end. When the body is lifted B44 the shoe slides along a rectangular bar (5) carried on the underside. The scheme also includes a pair of jacks (4) which can be brought into action to level up the vehicle when it is discharging a load on exceptionally uneven ground.
A DESIGN for a battery-electric vehicle for refuse collection and general purposes is shown in patent No. 476,037, by Bleichert-Transportanlagen G.m.b.H., of Leipzig, Germany. The most novel feature is the tipping arrangement which, in addition to providing the normal discharging tilt, has the ability to tip in a forward direction, raising the rear portion for the purpose of packing the contents by gravity.
The drawing shows the container in the normal position, whilst the two raised positions are shown in dotted lines. The body rests in two open-top bearings (I and 3), either of which can form the pivot for tipping. An advantage if this method of carrying the body is that it can be lifted off by a crane at a central station and replaced by a different type, such as a watercarrying tank, for example. The power for operating the tip is supplied by a pair of jacks (2), one on each side of the body.
Departure in Combustion Chambers.
COMBUSTION chambers for oil engines form the subject of patent No, 476,381, which comes from Hercules Motors Corporation, Canton, Ohio, U.S.A. This patentee states that, whilst spherical combustion chambeis have proved satisfactory in practice, the parts are difficult to manufacture, and being once made cannot easily be adjusted to suit special conditions. The design shown is said to remove both of these objections.
The drawing shows horizontal and vertical sections of a cylinder, with the combustion chamber located in the wall. The chamber consists of a horizontal bore, with inserted end walls (1 and ?) formed with angular inner faces, The shape so produced is claimed to be equal in efficiency to the sphere, but possesses the added advan