Buckles – buttons – clasps – etc.
Patent
1976-03-24
1977-06-14
Hix, L. T.
Buckles, buttons, clasps, etc.
240 44, 240 442, F21V 709
Patent
active
040299562
ABSTRACT:
In a projection device including a lamp unit detachably connected with a unit containing the optical condenser system, the lamp unit containing a concave mirror and an electric bulb mounted in a socket, the bulb being movable for the purpose of centering its filament coil in relation to the mirror and the condenser unit being fixedly mounted in a projection device while the lamp unit is merely supported by the condenser unit, the connecting means are so designed as to connect the lamp unit mechanically to the condenser unit as well as forming an electrical connection between the bulb socket and the terminal parts of the condenser unit. The connecting elements are secured to one of two units and extend parallel to the optical axis of the light fixture, the other of the units having guide recesses into which the connecting elements are inserted in the manner of a plug connection. Sliding elements are provided on the other unit that interact with the connecting elements, and the length of the connecting elements are such that the lamp unit can be adjusted as desired at various distances from the optical condenser system in order to make it possible to adjust the light fixture to various lens focal lengths of the projection device.
REFERENCES:
patent: 2109056 (1938-02-01), Bardwell et al.
patent: 3642361 (1972-02-01), Streu
patent: 3707327 (1972-12-01), Scheibel
Leibundgut Max
Reber Tony
Alos AG
Hix L. T,.
LaBarre J. A.
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