points of one’s teeth coinciding, as in the usual practice, these teeth are staggered so that all the teeth on one side of a good wheel are contrary the spaces between the tooth belonging IC) the spouse of the steering wheel. It is found that these gear wheels arc practically noiseless owing to the absence of back lash. The clutches that control the locking of the tires giving different gear ratios are often adjusted to consider up wear, without dismantling the gear-box.

they run in bushes of phosphor-bronze, and ball-bearings are interposed between your ends of the worm and the bushes. The illustration of the complete back axle shows the design which is made for commercial vehicles, and the differ ential gearing, which is definitely of the bevel pinion type, is included within the worm steering wheel.

The Power Plant Company also produces a speciality of a gear-box, the wheels where are always in mesh, and so are locked by means of friction clutches. The gear wheels are all of the double helical type, and the cutting of this forms the main topic of a split patent. Rather than the central

The manufacturers declare 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 an individual thread, but, for reductions of speed between the worm and wheel of less than 8 to 1 1, multiple threads are employed. The complete unit is supplied in a dirt and oil-retaining circumstance, which has an inspection starting at its higher part. In the typical design the worm is positioned beneath the wheel, where it revolves in a bath of oil. The worm shafts are produced from mild steel, and so are afterwards hardened and surface true;

The ” Globoid ” Worm Gear.
The gear could be adapted to a number of purposes, such as driving equipment tools, hoisting equipment, or in practically any case where a silent reduction of initial swiftness is desirable. The makers have turned their focus on certain requirements of the motorbus and lorry builder, and are now prepared to supply full hack axles for just about any type of motor vehicle which is influenced by a cardan shaft. The worm steering wheel in this specific system has, instead of the usual cut pearly whites, revolving rollers which happen to be continued hardened, and ground, steel pins fixed into the circumference of the nice wheel. The rollers, as may be seen in the illustration, are of conical form, and the worm is minimize to match these accurately. The materials for the several parts are selected in such a way that the metal used in the producing of the rollers is certainly softer than either the pins, on which they revolve, or the worm. As a result, if any wear should take place after long employ, it really is an easy matter to replace the worn rollers. This feature is an essential one on the score of economy, because instead of the entire worm and wheel needing to be replaced at much cost, only the tiny parts must be renewed.

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