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Contributions from Drivers and Mechanics.

21st December 1911
Page 19
Page 19, 21st December 1911 — Contributions from Drivers and Mechanics.
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Which of the following most accurately describes the problem?

TEN SHILLINGS WEEKLY for the Best Communication Received, and One Penny a Line of ten words for any thing else published.

Drivers of commercial-motor vehic"es and traetors, and mechanics and foremen of garages or shops, are invited to send short contributimis on any subject which is likely to prove of interest to our readers. Workshop tips and smart reprArs; long and successful runs ; interesting photographs : all are suitable subjects. Seal a post-card, or a letter,

or a sketch to us—no matter short, or how written, or how worded.

We will " knock it into shape" and prepare sketches, where necessary. before pulqication. The absence of a sketch des not disqualify for a prize. When writing use one side of the paper only and mention your employer's name as a guarantee of bona fides. Neither your own our your employer's name se,;ll be disclosed. Payment will be made imme• diately after publication. Address your letters to The Editor, Ti COMMERCIAL MOTOR, Hosebery Avenue, London, E.C.

Werefer readers of this page to the latest particulars of the next C.M.U.A. Parade—on pages :322-3.23.

For Stepped Keys.

W.J.S," (Anton) writes : " I have frequently had difficulty in getting the coned, alignment when I have wanted to file a stepped key with cons:dcrable accuracy. This is often necessary, as your readers will know, when the keyways in the shaft and coupling do not exactly coincide in the matter of width. I have made a sketch showing a little jig that I use when I have a job of this sort to carry out, and which will probably present no difficulty to your readers if they wish to make one like it. The loose top may be so adjusted as to guide a file just as required."

The Inevitable Hairpin.

[97.)1 " W.B." (Weston-Super-Mare) writes —'1 see you publish contributions from motor drivers. I am a driver of an old type of chassis, and I thought it might interest you to let you knew what happened to my car the other day, and how I overcame the difficulty. A wipe contact broke off, and we had apparently nothing on the car which we could satisfactorily put into its place. We were away in the country, a long distance from any garage or anywhere where we could get help, and there did not seem any possibility of making another wipe, but I asked a. lady, who happened to be with me, to lend me a hairpin, and I found that there was sufficient spring in this to enable me to fix it up on the centre spindle in such a way that it acted quite satisfactorily, although with a good deal of sparking, as a wipecontact piece. We went over 200 miles rigged up in this way. I have heard of hairpins' being put to all sorts of extraordinary emergency uses, hut this is the first time where one has saved me a serious breakdown."

An Interesting Carburetter Alteration.

The sender of the following communication has been awarded the 108. prize this week.

[976] " G.S.C." (Slough) writes : " Herewith I send you particulars and a rough sketch, which I ask you to redraw, of an attachment which I have devised for and fitted to an old-pattern Milnes-Da Miler carburetter. The object of this device is to allow the engine to be throttled down until it is only just ticking round. I will at once admit that I only thought of this way of doing it after I had had considerable experience with the Solex ' carburetter, My device, in my opinion, has the great advantage of being capable of adjustment for both quantity and quality of the mixture which passes through the by-pass while the engine is running. This can be done, too, without any alteration of the main jet:, and, moreover, without any supplementary jet.

" The attachment, as shown in the sketch, is made from a couple of I-in. gas T-pieces, two connections, and two small turned fittings. The illustration should explain exactly how these are employed. By screwing the bottom adjustment inwards or outwards, the opening to the by-pass may be drawn from or advanced towards the jet, respectively, thus weakening or strengthening the mixture, as may be desired. The adjustment at the top simply acts as a stop

valve and determines the speed at which the engine will run when the main throttle is dead closed.

"In conclusion, I would only remark that this attachment costs no more than about 5s. I am of opinion that it will give as good or even better results than many expensive so-called automatic carburetters which are nowadays on the market."

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Locations: Slough, London

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