106 



Popular Science Monthly 



A Masking Device Which Brings the 

 Whole Picture in the Pliotograph 



EVERY once in a while the amateur 

 photographer gets into trouble by 

 turning his camera over to take a length- 

 wise picture, using the up and down, or 

 the panel portion of 

 the finder, to locate 

 the object or person 

 to be photographed. 

 This often results in 

 an unfortunate head- 

 less and footless por- 

 trait of the camera 

 fiend's best friend. 

 Two citizens of In- 

 diana have invented 

 a masking device 

 which makes it im- 

 possible for even the 

 most careless person 

 to make such a 

 mistake. 



The device covers 

 the top of the view 

 finder, as the illustra- 

 Mon shows, and per- 

 mits the photo- 

 grapher to see the 

 scene only as it v.ill 

 go on the plate or 

 film. This effectually 

 prevents the using of the wrong length 

 of the finder — the panel portion for the 

 horizontal picture. 



A hinged flap contains the vertical 

 opening for one position and another 

 contains the horizontal opening. When 

 the finder is rolled over, the vertical 

 opening flap turns down beside the finder 

 box and the finder moves until the 

 ninety degree turn is complete and 

 the hinged flap carrying the horizontal 

 opening lies exactly across the screen. 



There can never be even the possi- 

 bility of a mistake with this device, be- 

 cause the shape of the 

 opening over the fo- 

 cusing plate is f.uto- 

 matically altered by 

 the change in the po- 

 sition of the finder. 

 By this simple means, 

 inexperienced photog- 

 raphers may avoid 

 many disappointments. 



The masking device fully covers 

 the top of the view finder 



The Engineer's Watch-Holder — It 

 Hangs the Watch in Any Position 



TO the engineer, the most practical 

 timepiece is one which can be used 

 without loss of effort and time. For this 

 reason, a watch-holder invented by Frank 

 J. Ellis, of Philadel- 

 phia, should meet 

 with his 

 approval. 



The device 

 consists of a 

 central bar 

 on which two 

 members are 

 pivoted — one 

 for attaching 

 the device, and the 

 other for holding the 

 watch in the device. 

 Both members are of 

 spring wire, the at- 

 taching arms being 

 sharpened at the 

 points to grasp the 

 support. 



The watch-holding 

 section is in one piece, 

 the wire being coiled 

 around the pivoting 

 bar, forming a hook 

 at the center of the 

 bar and a U-shaped spring in the loop of 

 the wire. In use, the ring of the watch 

 catches over the hook and the stem of the 

 watch slides into the U-shaped spring. 

 The tension of the various spring por- 

 tions of the de- 

 vice hold it im- 

 movably in any [fj' , jT\\ Holding 

 position. " ' \\ ^''•^ 



Hook 



Spring 

 forcing arms 

 down on 

 watch. 



The attaching armr of the 

 watch-holder are sharp- 

 ened so that they will 

 "bite" any wood support 



