Safeguarding the Sand Blaster 



At Left, the Hopper Where 

 the Workman Operates. A 

 Strong Suction Saves the Sand 

 and Draws Off the "Flour" 

 So Dangerous to the Lungs 



The Head-Dress Allows a Free 

 Passage of Air About the Head 

 and Through the Fine Copper 

 Gauze Which Protects the Eyes. 

 The Hands Are Heavily Gloved 



THE preparation of metal surfaces 

 for a covering of paint lias gi\-en 

 rise to the extensi\e use of sand 

 blasting outfits. When these are con- 

 structed of sufficient capacity to accom- 

 modate large surfaces such as are pre- 

 sented by automobile guards, hoods and 

 bodies, the problem of protecting the 

 workmen presents some difficulties. 



I'"inc quartz sand is si)rayed agair.st the 

 metal surfaces, causing a certain amount 

 *)f disintegration of tJie i)arliclcs of sand 

 into a powder as fine and volatile as 

 flour. This sand flour is very jienetrat- 

 ing, and many ingenious devices in the 

 form of head-dresses are now in use to 

 protect the face and lungs of the opera- 

 tor. The familiar helmet with its 

 s]ionge through which the operator 

 breathes is ada|)te(l for this inu'iiose. On 

 account of the cutting i)roperiies of the 

 sand, glass cannot be used, and the sub- 

 stitute is an exceedingly fine copper 

 gauze giving the necessary range of 

 \ision. 



Such devices are only partially suc- 



cessful from the standpoint of protec- 

 tion, and can only be relied upon when 

 built in the form of a diver's head-dress 

 and supplied with fresh air imder pres- 

 sure. Operations were first conducted to 

 co\er tlie larger detachable sheet metal 

 automol)ile j^arts such as dust shields, 

 fenders, hoods, etc., and after many 

 experiments, the device, as illustratetl, 

 has successfully solved the jiroblem. 



The container is of the familiar hopper 

 type, with a strong suction both o\er 

 the top and underneath, carrying only 

 the hea\'\' particles of sand Hour to the 

 bottom of the hopper, where they are 

 collected and again drawn through 

 the air-suction liose. In this way the 

 sand is used o\er and o\er again, and 

 onh' the Hour is drawn off. Fresh sand 

 is introtluced through the large door at 

 intervals, each unit caring for its own 

 s.ind sujipK". The work is introduced by 



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