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Aviation History
1910
1910 - 0560.PDF
T^JQHT JULY 16, 1910. SOME MORE FLIGHT ACCESSORIES. CONTROL LEVERS. -AN original type of locking device for control levers, invented by H. Taylor, has been placed on the market by W. Cochrane and Co. Jts special purpose is to afford a positive grip and to avoid back-lash. The locking bolt has triangular wedge - shaped teeth so spaced apart that they always press INSTRUMENTS. Dynamometers.—The Acer dynamometer is a simple and useful device for measuring the brake horse-power of engines. It has the advantage of not involving any calculations in determining the results of the measurement. The " B.H.P." is automatically recorded on a chart attached to the dynamometer, nor is. any special apparatus needed for using this device, as it is merely placed in contact with the fly-wheel of the engine. The fly-wheel rubs against two cork pads, and also a wheel, which record the pull and the speed respectively. Pressure Gauges.—The Okill pressure indicator, which has been placed on the market by Brown Bros., is a simple and compact device for ascertaining the compression or firing pressure in the cylinders of an engine. It consists of a cylindrical box, furnished with a screw fitting at one end and a screw-cap at the other. The screw fitting serves Model of Taylor's patent lever gear 'by W. A. Cochrane and Co, The -object of the design is to secure great strength and rigidity in the locking mechanism. Okill's patent pressure- indicator introduced by Brown Brothers. The milled head on top of the device is screwed down until the lever on the left stops vibra ting; the pressure is indicated on the scale. The above sketch shows an anemometer that is being put upon the market by Eyquem's Patents. The scale is in metres per second. as a means of attaching the indicator to the cylinder, while the screw cap enables a spring contained inside the indicator-casing to be tightened down. On the outside of the indicator-casing is a small lever, which vibrates to and fro until the screw-cap is turned down to such a position as to bring the lever to rest. On the outside of the indicator-case a scale is engraved, and on the cap is a pointer that moves over the scale. When the lever has been brought to rest, the pointer on the cap indicates the maximum pressure in the cylinder by the reading on the scale. Revolution Indicators.—Well made revolution indicators fitted in aluminium cases are made by S. Smith and Son, whose speed indicators, which are based on the same principle, have won such popularity with motorists. A specially light revolution indicator for use on aeroplanes . or dirigibles is also manufactured by Gratze, Ltd. The Craig cylinder gauge, as constructed by Acer, -Ltd., for the purpose of testing the accuracy of cylinders. -against opposite faces of fixed jaws on the stationary quadrant. A spring draws the two members together and thus automatically takes up all play. The locking -bolt is released by an ordinary trigger on the handle. EYEBOLTS. Eyebolts of standard design can be obtained from Messrs. the Aeroplane Supply Co., Brown Bros., W. Cochrane and Co., Harris and Samuels, Melhuish •and Co., Rubery, Owen, and Co., and Handley Page, Ltd. Those supplied by the latter firm are nickel-plated. FIRST AID. A neat but extremely useful little pocket " Tabloid " first-aid equipment, specially adapted for aeronauts, is placed on the market by Burroughs, Wellcome, and Co. •It is no bigger than a cigarette case, being only about Jj inches square, and weighing about 4 ozs. The Acer dynamometer, constructed by Acer, Ltd., for testing the horse-power of engines. This ingenious and well-made device is fitted with cork pads that are pressed against the revolving fly-wheel of the engine, and an automatic record is obtained of the torque and speed upon a diagram paper. 558
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