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Intake Air-heater for Oil Engines

9th July 1943, Page 34
9th July 1943
Page 34
Page 34, 9th July 1943 — Intake Air-heater for Oil Engines
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A Resume of Patent Specifications That Have Recently Been Published

object of a scheme described in

patent No. 553,115 is to facilitate the starting of large oil engines by heating the-ingoing air to a high temperature, the patentees being V. Beddow and Southdown Motor Services, Ltd., 5, Stein° Street, Brighten. A feature of the device is the high output of the electric heater, no less then one kilowatt being liberated in the form of heat. The thawing shows the heater housed en. a box forming part of the air inlet to the engine. A coil (2) is supported in the passage by meanS of three beaded-wire hoops (1), so that all .parts are traversed by the air,. ' The high temperature not only assists selfignition in the case of an oil engine, but also softens the oil onthe cylinder walls, thus leading to a higher starting speed. Part of the air may be diverted through the sump to give the oil an initial warm-up.

If employed with a petrol engine, the device is used to warm only the ingoing air, not the mixture itself, which would probably be ignited by the high tern-. perature of the coll.

As the output of the heater calls for well over 80 amps. discharge from a 12-volt battery, 'it would scarcely be suitable for other than mains operation.

MECHANICAL OPERATION FOR HYDRAULIC BRAKES

n)provide a means for direct aechanical Operation of brakes normally operated hydraulically, with the fewest possible number of parts, is the object of a brake modification shown in patent No. 552,568, by Bendix Aviation Corporation, South Bend, Indiana, U.S.A.

The drawing shows the mechanism employed, which is located inimedi a ely underneath the hydraulic

spreader. Through the back-plate (4)• projects a lever (3) adapted to receive the end of a Bowden-type cable. The lever (3) fulcrums on one end of a strut (1) which presses on one shoe (5); the lever itself operates the other shoe-end (2). The action is togglelike, magnifying the applied pressure with continued movement. The strut is arranged partly to cover the slot in tha back-plate so as to assist in the exclusion of dirt.

STARTER PINION WITH RESILIENT BUFFER

ASTARTER pinion, in which a rubber buffer is used to minimize the shock of engagement, is shown in patent No. 552,200, by Bendix Aviation Corporation, South Bend, Indiana; U.S.A. Other advantages are

compactness and case of dismantling and replacement. The central shalt, .as shown, forms part of the motor • armature and is provided with a

pinned-on sleeve (0). A screwed sleeve (7), free on sleeve 6. is provided with an end flange (3) which, by means of splines. engages with a drum member (1) attached to the shaft' The pinion proper carries a tubular part (5) to which its hut member (4). is attached.; thisMoves endwayS under high acceleration in the well-known manner.

The end thrust of the screwed sleeve (7) is opposed by a rubber ring (2) trapped in drum 1; in the event of heavy shock, asmay be caused by an attempted tooth-to-tooth engagement. this resilient member will be compressed and allow the pinion to revolve slightly, so that meshing can take place.

In the example shown, the splines e (8) on the drum are of helical form ; this subjects the rubber ring to a twodimensional deformation, REMOVABLE TUYERE FOR A GAS PRODUCER

TO enable clinker to be withdrawn directly from the Ore zone of a gas producer is the object of a design of detachable air inlet shown in patent No. 558,167, by I. Waugh, To Kauwhata, Auckland, New Zealand. The drawing shows a section of the tuyere, which is of the cross-draught type. Welded to the body of the producer is a water-cooled .tubular member (1) which houses a second similar member (2) containing the air tube (3). This , inner member is a sliding fit in Its housing and can be withdrawn to permit the insertion of a declinkering tool into the fire, flexible hose connections permit the operation to be performed

without the need for breaking water joints.

In Other examples, the inner member is air-Cooled, the outer jacket, however, Still being water-cooled. The device shown at 4 is a valve which controls the air inlet in accordance. with the engine suction, PREVENTING WOBBLE IN

RUBBER-MOUNTED ENGINES nICengines used on road vehicles are usnally mounted on rubber blocks, or oth.er form of resilient packing, for the purpose of damping vibration. However, when such -en engine is being stopped the last few revolutions may give rise to a violent low-frequency wobble, which may reach an undesirable amplitude. To prevent this is the .objectof a scheme shown in patent No. 552,695e by A..F Sanders, 1, Park Crescent, Leeds, 8.

• The drawing shows, in partesection, one of the combustion heads of a multi-.

eylindered engine. The combustion space is.fitted with a valve (2), which may also he used as a decompressor to assist starting. A cam bar (1) operates all the relief valves, and the essence of the patent is that a rod'from the injection-pump control shall be coupled to this bar so that a single movement of a hand-operated lever can cue off the fuel and open the valves,. thus allowing the engine to corn's to rest with the compression released.

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Locations: Auckland, South Bend, Leeds

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