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Aviation History
1918
1918 - 0817.PDF
JULY 18, 1918. Q A PROPELLER SHAPER. QUITE a deal of interest has been aroused by the demonstra- tion recently given by. Messrs. A. Ransome and Co., Ltd., Newark-on-Trent, of the propeller shaper which they are introducing. Of solid and compact design, the machine is self-contained, and driven by one bait; it is claimed that its manipulation is so simple that any unskilled person of average intelligence - can operate it after a few minutes' instruction. Four-bladed propellers can be shaped with the same facility as two- bladers. as the blades of a four-blader swing clear outside the driving band. The main bed of cast^iroff box section, carries all the parts blade, the machine starts up a foot lever, the rocker is brought to its work by a simple release mechanism and, the split nut being closed, the operation is started, The action now becomes purely automatic, no further attention is necessary, as, when the cutter reaches the. propeller boss, the feed is automatically cut off. Tl\e machine can then be stopped, the blade taken out and the operation repeated. As it may be necessary sometimes to have a little more left on the blade above its finished dimensions, arrange- ment for this is provided on the rocker bracket. A quadrant with holes drilled in and a lever with a spring plunger to THE EXCELSIOR PROPELLER-SHAPING MACHINE.—Front and back views. i- of the machine thit the rocking bracket carrying the cutterblock and the tracer roller oscillating and sliding alonjg a screw mounted at each end of the box. This bracket isrocked backward and forward, its movement being con- trolled by the contour of the model, while it slides forwardon its fixed feed screw by the rotation of a split nut. This split nut is rotated by gearing from the cutter spindle, anarrangement designed to prevent any-accident to the pro- peller by the cutter belt coming off, as feed motion is derivedfrom the cutter spindle. The prop:Her is held by placing the thin end of the blade(with its prepared centre) in the specially designed centre of the tailstock <tnd then passing a bolt through the propellerboss. The rocker bracket is placed at the thin end of the suit these holes is so designed that by placing the plungerin any of these holes variation of \ mm. in the thickness is obtained from the finished dimension. The cutters are of aspecial design for this particular; class of work and give a good and clean cut; the only work necessary after machiningbeing the air of a sand belt. In order to obtain the best results with the cutters, a"jointing" apparatus has been designed to attach to the cutter spindle rocking bracket. The process of " jointing "consists in truing-up the cutters so that each cutter does exactly the same amount of work. The cutters having beenfixed, the cutter block is run at full speed, and a small piece of carborundum is traversed across the cutters, and by justtouching their edge, equalises them. THE AIRCRAFT WORKERS' STRIKE. THE strike of aircraft workers in the London district wassettled on the evening of July 10th, and work was resumed the next morning. Mr. Winston Churchill, Minister of Muni-tious, with Sir Thomas Munro, Chief Adviser, Labour Re- gulation Department, and Sir David Shackleton, PermanentSecretary, Ministry of Labour, held a series of conferences with members of the London District Aircraft Committee,and after negotiations lasting six hours the representatives of the workers agreed to recommend that the strikers shouldreturn to work on the understanding that the Government took over the Alliance Aeroplane Works of Messrs. Waringand Gillow, and that the shop steward Rock was re-employed 815
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