MARTIN, Chief Justice.
The invention in issue is an attachment or accessory for motion picture projecting machines. This kind of a machine comprises a lamp house mounted upon a suitable support, containing an arc lamp or an incandescent lamp of high intensity, with suitable condensers for focusing the light on the film when in place in the "projection aperture." The aperture is the same size as the picture upon a film, and cuts off the light from all portions of the...
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