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Page:Popular Science Monthly Volume 90.djvu/422

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��Popular Science Monthly

���The patient is lowered upon the table or bed, the center strap is withdrawn, and the two halves of the stretcher separate

A Reversible Stretcher with Two Dovetailing Sections

THE trouble with mest stretchers is that the] patient has to be moved from the stretcher instead of the stretcher being removed from the patient. The accom- panying illustration shows a new stretcher which parts in the middle, permitting the patient to be lowered upon the operating table without disturbing him. The two halves of the web are merely drawn away from under him.

The two parts of the stretcher are toothed, and dovetail into each other. A strap, which passes through the indenta- tions, holds the web securely together until it is withdrawn. The stretcher can also be reversed and carried upside down when used in close quarters. This one feature enables it to be used with seven inches less headroom than other stretchers.

��Sacrificing Diamonds for Accuracy in Manufacturing Automobiles

ENOUGH diamonds are sacrificed each year in the average auto- mobile factory to fit up a dozen kings' crowns! Quantity production of auto- mobiles requires that every one of the thousands of parts turned out by ma- chinery must measure up to a high standard. Only then will the parts of the assembled automobile work togeth- er smoothly. The emery wheels, used for rapid finishing, must be " trued up" with corresponding accuracy. Nothing less hard than, the diamond can be depended upon for this "truing."

��A Golf Ball's Wash- ing Machine

HE unfortunate golf ball often be- comes covered deep with mud, and dras- tic measures are needed to get it clean. That explains why the ma- chine pictured has been invented. The appliance is like a scrubbing machine. It consists of a set of rotary bristle-brushes placed close together so that they enclose the golf ball when it is placed between them. The golf ball is pushed down between the brushes into a cup-shaped holder near the bottom of the machine. The bristles are then rotated downwardly by the turning of a handle which connects with the brushes by bevel gearing, as shown in the accompanying illustration. The stiff bristles pass through water placed in the bottom of the machine, and when they pass over the golf ball they scrub off the mud and carry it down into the water. Moreover, the ball keeps constantly turning and new surfaces are exposed to the brushes, so that the entire surface quickly becomes clean.

The turning may be explained by the fact that the grip of each of the brushes on the ball varies in strength. The brushes that grip harder are able to turn the ball around with them. By turning the handle back half a turn, the scrubbed ball is lifted up so that it may be taken out of the machine. The machine takes up a space of only nine by five inches.

��The washing machine may be attached to any convenient sur- face, as at left. Below is a view of the interior mechanism






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