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A NEW MAGNETO.

14th September 1920
Page 28
Page 28, 14th September 1920 — A NEW MAGNETO.
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A Résumé of Recently Published Patents.

Magneto construction in general has proceeded for many years on somewhat stereotyped lines, which fact lends added interest to a new design which has just been patented by Mr. C. P. Godfree, his specification being numbered 148,695. The principal object of the invention is that, of rendering both distributor and contact breaker more accessible for cleaning and adjustment:than is usually the case. The inventor has also made provision in the design for collecting the high and low tension currents frem two slip-rings mounted ‘githilea cover at the .driving end of the magneto: . The armature and spindle are mounted in the usual manner in ball bearings. At th iend of the spindle, remote from. the driving coupling, a small bevel wheel is mounted, and this drives a horizontal bevel gear secured to the bottom end of a vertical spindle. At

k. the top of the spindle, and disposed above the top of the magi-WV° itself, are mounted the .contact breaker and distributor. Reference to the illustration which accompanies these notes will help more than any verbal description to demonstrate the increased accessibility

which is afforded by this construction. It will be seen that a cover,. which is retained by means of a pair of spring clips, serves to enclose both of those . important components of a magneto, the contact breaker and distributor. They are thus rendered available for any of

the little attentions which may become necessary at -a moment's notice. Provision is made to facilitate the proper engagement of the bevel wheels.

Other Patents of Interest.

The old type commutator which used to be such a familiar and also somewhat. disagreeable component of the ignition system of a car receives attention in specification No. 148,676 by C. S. Snell. Bearing in mind that many of the difficulties with this device generally arise through the wear of the roller or of the circular non-concluding ring against which it bears, this inventor has conceived the idea of replacing the roller by a small hall bearing.

An ingenious arrangement of accelerator pedal mechanism' is described by R. Esnault-Pelterie in specification No.

136,805. Re points out what is generally true, that a ,.disadvantage of the usual construction is that, while small movenkents of the pedal, when thethrottle is nearly closed, have a considerable effect on the actual opening of that cernponeilt, when the throttle is almost fully opened the same movement of the pedal has practically no effect. In his invention he suggests two alternative designs, embodying either arrangements of levers or the use of cams, which so modify the relative movements of pedal and throttle lever that when the throttle is nearly closed it requires considerable movement of the pedal for small'movement of the throttle valve, 'while when the valve is almost fully open a small Movement. of the pedal causes, comparatively, much greater displacement of the throttle.

G. J. Morgan and another improve upon the familiar wheel drawer, of the type in which a false hub cap fitted with a forcing screw is used to displace the wheel, by making the forcing screw in two parts. There is an outer compone-nt, which is screwed into the boss of the false hub cap in the ..5r din a r y way, and which is bored to accommodate the inner part, which is a simple plunger with a round knob or head on its inner end. Irk use the hub cap is fitted on to the wheel in the customary manner. The forcing screw with its inner plunger is screwed down until the knob on the end of the plunger is in contact with the end of the axle. A sharp hammer blow on the cuter end of the plunger is then most effective in starting the wheel from its place on the shaft. Not only does the arrangement of the plunger, With its rounded head, obviate any risk of damage to the screw threads on the end of the shaft, but its disposition within the hollow screw also conserves the force of the hammer blow. The specification is numbered 148,705.

The electrical resistance control for vehicles, which is described by TillingStevens, Ltd.., appears chiefly to be notable for the fact that the contact seg. merits are stepped instead of forming a surface of a cone, as is customary. The i advantage of this arrangement s that line contact between these segments and the spring terminals is effected, instead of, as in previous constructions, merely point. contact (No. 148,651),

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People: C. P. Godfree

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