Page:Popular Science Monthly Volume 92.djvu/122

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��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

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