points of the teeth coinciding, as found in the usual practice, these teeth are staggered so that all the tooth on one side of a wheel are reverse the spaces between your teeth belonging IC) the other half of the wheel. It is discovered that these gear wheels arc practically noiseless due to the absence of back lash. The clutches that control the locking of the wheels giving different gear ratios are easily adjusted to have up wear, without dismantling the gear-box.
they run in bushes of phosphor-bronze, and ball-bearings are interposed between the ends of the worm and the bushes. The illustration of the entire back axle shows the design which is made for commercial automobiles, and the differ ential gearing, which is definitely of the bevel pinion type, is contained within the worm wheel.
THE ENERGY Plant Company also causes a speciality of a gear-box, the wheels in which are always in mesh, and are locked through friction clutches. The gear wheels are of the double helical type, and the cutting of this forms the subject of a split patent. Instead of the central
The manufacturers claim that, by this specific system, only to per cent. of the power is dropped in friction. The usual practice is to slice the worms with a single thread, but, for reductions of speed between your worm and wheel of less than 8 to 1 1, multiple threads are used. The complete unit is supplied in a dust and oil-retaining case, which includes an inspection opening at its upper part. In the standard design and style the worm is positioned beneath the steering wheel, where it revolves in a bath of oil. The worm shafts are manufactured from mild steel, and so are afterwards hardened and ground true;
The ” Globoid ” Worm Gear.
The gear can be adapted to a variety of purposes, such as driving equipment tools, hoisting equipment, or in practically any case where a silent reduction of initial acceleration is desirable. The makers possess turned their attention to certain requirements of the motorbus and lorry builder, and so are now ready to supply complete hack axles for any type of car which is motivated by a cardan shaft. The worm steering wheel in this particular system has, rather than the usual cut tooth, revolving rollers which happen to be carried on hardened, and ground, steel pins fixed in to the circumference of the nice steering wheel. The rollers, as may be seen in the illustration, are 
of conical form, and the worm is slice to fit these accurately. The materials for different parts are selected in such a way that the metal found in the making of the rollers is normally softer than either the pins, on which they revolve, or the worm. Consequently, if any put on should take place after long employ, it is an easy subject to replace the put on rollers. This feature is an important one on the rating of economy, because instead of the whole of the worm and wheel having to be changed at a heavy cost, only the small parts have to be renewed.
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