406 



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 bed, the center strap is withdrawn, and 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 it is withdrawn.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 



5T0L BRU5HE5 BEVEL GEARS 



1/ 



BOLTS FOR ^-- 

 MAKING ATTACHM 

 TO TEE 5TAN0 OR 



GOLF BALL 



WATER 

 OUTLET 



