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US 5,859,687 AGranted
Bar skiascope beam fixable in parallel
AssigneeHeine Optotechnik GmbH & Co. KG
InventorsHelmut Heine, Anton Schneider, Otto H. Schmidt
Life of this patent
Estimating the term…
Abstract
A bar skiascope that has lens slide for displacing a condenser lens along a direction of a light beam also includes a stop slide that can be displaced up to a predetermined maximum position in a displacement path of the lens slide, wherein the condenser lens is located precisely in a position for producing a substantially parallel beam, when the stop slide is in the maximum position, and a stop slide stop element, belonging to the stop slide, and a lens slide stop element, belonging to the lens slide, come into contact with each other.
Claims14
A bar skiascope having
- a skiascope housing,
- an incandescent lamp placed inside the skiascope housing,
- a condenser lens placed in front of the incandescent lamp inside the skiascope housing in a direction of radiation of a light beam from the incandescent lamp, and
- a lens slide connected to the condenser lens, for displacing the condenser lens along a displacement path of the lens slide relative to the skiascope housing in the direction of radiation of the light beam,
- a stop slide supported by the skiascope housing for being displaced in a stop-slide displacement path relative to said housing by application of force with a finger to a predetermined first stop-slide maximum position in the displacement path of the lens slide and for being affixed relative to said housing upon removal of said force so as to determine a first lens-slide maximum position at one end of said displacement path of said lens slide.
2 more elements
A bar skiascope having
- a skiascope housing,
- an incandescent lamp placed inside the skiascope housing,
- a condenser lens placed in front of the incandescent lamp inside the skiascope housing in a direction of radiation of a light beam from the incandescent lamp, and
- a lens slide connected to the condenser lens, for displacing the condenser lens along a displacement path of the lens slide in the direction of radiation of the light beam,
- a stop slide supported by the skiascope housing for displacement to a predetermined position in the displacement path of the lens slide;
- wherein:
- the lens slide and the stop slide have a common direction of displacement;
- the stop slide comprises an elongated die bolt and a guide lug connected to the die bolt;
- the skiascope housing defines a guide opening, with the guide lug fitting in the guide opening;
- the guide lug can be moved back and forth between a first position at a first end of the guide opening and a second position at a second end of the guide opening;
- a stop slide stop element is at an end of the die bolt directed toward a lens slide stop element;
- and
- the guide lug is placed at an end of the die bolt opposite the end at which the stop slide stop element is located.
10 more elements
Dependencies are inferred from the claim text.