With Intent to Improve.
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A Weekly Summary of Recent Patents, of Interest to the Maker and User of Commercial Motor Vehicles.
Selected and Abridged by H. S. Hall, A.M.I.A.E.
A Peugeot Shock Absorber.
Societe Anonyme Des Automobiles and Cycles Peugeot, of 71 and 73, AVeDUO do in Grande Arm'es, Paris, and Jules Michel Mario Truffault, 51, Avenue des Terries Paris, in specification No. ICQ,841, describe a shock absorber of that type in which• an externali bracket anchored to the frame covers frictional devices 'Whicli operate upon La. lever coupled to the vehicle axle, so that, as the vehicle axle tends to rise, and fail under the influence of -the:..ordiary road springs' the frictional devices within the bracket operate to daMp out excessivo. or too-rapid oscillations.
. In the Peugeot shock absorber' the 'spindle to which is attached the lever which is coupled t,43 the axle carries a disc, round which is.a number of circular holes, These holes gear with projections ol an internal gear wheel. Round the oiAside of this gear .vviteel beds a brake. band, itself -held stationary within the bracket. The sizes of the holes in the disc, and of the projections. on the internal gear' . are such that' a certain amount clf free angular ,motion of the lever is possible before the disc cornrnenceS to impart motion to the gear wheel. The cogs on this gear mesh with similar teeth on a second gear. wheel upon which the gear is cut externally. The space between one tooth and the next of each of these gear wheels is such that again a small amount of angular motion of the internally-cogged external gear is possible before. the inside gear commences to move. The motion of this irisid' ear is also retarded by means of brake band; in a similar manner to the other.
It will be gathered that the resistance of vibration is a progressive one. A certain amount of free vertical motion of the -axle is possible before the holes in the disc, which is part of the spindle on which the lever is fastened, engage with the projections on the internally-toothed gear. Motion beyond this is retarded only by means of the brake band on this gear. Additional resistance takes effeet when the teeth of this outer gear wheel come into contact with those, of the inner one, motion of which ia restricted also by a brake band..
• A Simms Magneto Patent.
F. R. Simms, of Percy Buildings, Grease Street, Bathkone Place,. London, W., has devised a simple method of holding the distributor of a magneto in place.• He extends the cap or lid of the lubricator for the distributor and its shaft so that the extension forms a, clip which is sprung into place over the edge of the distributor. The drawings we reproduce are from the specification No. 106,195.
For Paraffin or Similar Fuel.
F.. Wilkes, of Harcourt Road, Llandudno, has devised a means of beating tha induction pipe in the case of the ordinary comniercial-vehiele engine. He clamps a container of channel section round the. exhaust pipe, and fills this container with absorbent,. non-combustible material, such as asbestos or slag wool covered by a.,gatize screen.
When starting,. methylated spirit is poured into the receptacle and ignited. As a result the induction pipe is locally heated and enables the fuel to be More readily 'vaporized.
An Unusual Lock-nut.
It is quite evident to anyone who peruses the patent records from week to
week that we are a long way from reaching 'finality in respect of devices for securinginns and preventing their shaking loose. .
G. F. Drake, of 1131, Oak Street, Oakland, Alemeda County, California, U.S.A, has made what appears to be quite a good attempt to evolve Something
• of the kind in specification 106,149;
This device is of the type which Hems. sitatcs two nuls The lock-nut of this pair', however, performs its function iii all unusual manner. . Reference to the drawings we reprodime will make it clear to the reader that time lower or main nut is made very like a castle nut, except that the castle .portion. is tinned to a some' what smaller diameter than usual, and its cylindrical part18: also coned or tapered towards its upper end: The lock nut has a -recess formed in it on its undeoide so that when screwed down it tends to prevent the castellated end -of 4the main ...nut from turning and to squeeze it in on the thread.