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 steering wheel. It is discovered that these gear wheels arc practically noiseless due to the absence of again lash. The clutches that control the locking of the wheels giving different gear ratios are easily adjusted to have up dress in, 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 usually of the bevel pinion type, is contained within the worm wheel.

THE ENERGY Plant Company also makes a speciality of a gear-box, the wheels in which are always in mesh, and so are locked through friction clutches. The gear wheels are of the double helical type, and the reducing of this forms the subject of a different patent. Instead of the central

The manufacturers claim that, by this specific system, only to per cent. of the power is lost 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 employed. The complete unit is supplied in a dust and oil-retaining case, which includes an inspection opening at its upper part. In the typical design and style the worm is placed beneath the steering wheel, where it revolves in a bath of essential oil. The worm shafts are made from mild steel, and so are afterwards hardened and ground true;

The ” Globoid ” Worm Gear.
The gear could be adapted to a variety of purposes, such as for example driving equipment tools, hoisting equipment, or in practically any case where a silent reduction of initial rate is desirable. The makers have turned their attention to the requirements of the motorbus and lorry builder, and are now ready to supply entire hack axles for just about any type of car which is powered by a cardan shaft. The worm steering wheel in this particular system has, rather than the usual cut teeth, revolving rollers which will 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 cut to fit these accurately. The products for different parts are selected so that the metal found in the making of the rollers is certainly 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 score of economy, because instead of the whole of the worm and wheel having to be changed at a heavy cost, only the small parts must be renewed.

Have an inquisitiveness concerning the globoid worm?