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AssigneesBraun GmbH, Enna-Werk Optische Anstalt
InventorsKarlheinz Barowski, Kurt Schubel, Hans Welnhofer
Estimating the term…
The device is provided with a lever which is pivotally mounted at one end and is urged in the downward direction by a spring, a slide-carrying shoe being attached at the free end of the lever. The lever has an upwardly curving centre portion which rests on a roller mounted on a disc driven at half-speed by a motor. The device also comprises a slide guide consisting of two prismatic rails, one of which is stationary, while the other is secured to a carriage mounted displaceably in the plane of the slide and capable of being pulled towards the stationary rail by means of a spring. There is a coupling pin on the carriage which is engaged with a control cam provided on the lever-driving disc, the said cam being designed in a manner such that the movable prismatic rail is pulled back only during the downward movement of the slide shoe which moves between the prismatic rails, the said slide being otherwise pressed against the stationary rail under the action of the spring. In its lowermost position, the slide shoe may rest upon a stop which is vertically adjustable in order to be able to set the slide accurately in relation to the optical axis. The stop for the slide shoe is preferably mounted at the end of a double-ended, spring-loaded lever, the setting of which is adjusted by means of a screw.
A device for moving slides vertically in slide projectors so that slides may be lowered from a circular magazine into a projection postion and then raised from the projection position back into the magazine, the device being of the type including an arm pivotally mounted at one end, a spring connected to the arm, a shoe on the end of the arm for carrying a slide, a multi-cam disc, an electric motor connected to drive the cam disc, a slide guide arrangement having a pair of spaced prismatic rails to guide and hold the slide in the projection position, a stationary mount for one of the rails and a movable mount for the rail in the plane of a slide in-projection position, a spring urging the movable mount against the multi-cam disc, and a stop positioned to limit the downward movement of the end of the arm carrying the shoe with improvement comprising:
Dependencies are inferred from the claim text.