The Inventor Invades the Workshop and the Office 



A dustless disk grinder with an ad- 

 justment for accurately grinding 

 segment ends or any angular face 



A file handle 

 with an elas- 

 tic ferrule. A 

 spring holds 

 the file tang in 

 an elastic grip 



An air-operated arbor press; the 

 downward or pressing stroke is 

 slow, the upward stroke fast 



At left: An internal 

 cylinder grinding 

 machine in which 

 the work-holding 

 table can be tilted 

 to any angle. A 

 vertical bar with a 

 circular rack is fed 

 around and down 

 at the 'same time 

 by the horizontal 

 motor operating on 

 gearing. Inside 

 the main bar is a 

 sleeve containing a 

 grinding spindle 



Creasing your trousers while you wear 

 them. The pressing board is held in 

 one hand and two revolving iron 

 drums are operated by the other 



A street-car snow scraper with ad- 

 justable blades resting in rail flanges. 

 It is operated by air or by a lever 



A drill press, vise, pipe vise and anvil all in one. 

 A hollow screw holds a drill which may be revolved 

 by handles. A steady wooden base is provided 



278 



