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US 4,734,918 AGranted
Luminous band display device
AssigneePreh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
InventorsKarl-Heinz Bauer, Reinhold Wolf
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AssigneePreh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
InventorsKarl-Heinz Bauer, Reinhold Wolf
Estimating the term…
A luminous band display device is shown for the thermometer scale-like diay of the position of a control, e.g., of a turning knob or slide, having a series of luminous segments arranged in a circular or straight pattern. The luminous segments are formed by the ends of light guides which are led out from a generally cylindrical luminous center in a star-shaped or similar pattern. The luminous center consists of a cylindrical socket receiving a light source, and a cover which carries at least one color band and which can be rotated relative to the socket by means of the control is located between the light source and the beginning of the light guide. The light guides are arranged over approximately three fourths of the circumference of the luminous center. In order for all luminous segments of the entire display scale to light in only one color even in the stop positions of the control, an outlet opening and a guide for the color bands projecting from the socket are provided.
A luminous band display device for the thermometer scale-like display of the position of a control of an operating condition in a heating and ventilating system, the control being adjustable about its axis, comprising a plurality of light guides, each said light guide having an inlet end and an outlet end, the outlet ends of said light guides being arranged to form a row of luminous segments, luminous center means having a light source and a generally transparent electrical socket therearound, the inlet ends of said light guides being in optical connection with said luminous center means, cover means within said socket and between said light source and said inlet ends for modifying the light therefrom, means for rotating said cover means in accordance with the position of said control, at least one color filter, a portion of said color filter fixed on said cover means, the extent to which said color filter is fixed on said cover means being rotatably related to the position of said control, whereby said color filter intercepts and modifies light at a plurality of said inlet ends of said light guides corresponding to said control position, said color filter having a length corresponding to at least all of said light guide inlet ends, at least one opening in said socket for passing said color filter therethrough so that a portion of said color filter is outside said socket, guide means for guiding and projecting said color filter through said socket opening.
A luminous band display device for thermometer scale-like display of the position of a control of an operating condition in a heating and ventilating system, comprising a plurality of light guides, each said light guide having an inlet end and an outlet end, the outlet ends of said light guides being arranged to form a row of luminous segments, luminous center means having a light source and a generally transparent electrical socket therearound, the inlet ends of said light guides being in optical connection with said luminous center means, cover means within said socket and between said light source and said inlet ends for modifying the light therefrom, means for rotating said cover means in accordance with the position of said control, at least one color filter, a portion of said color filter fixed on said cover means, the extent to which said color filter is fixed on said cover means being rotatably related to the position of said control, whereby said color filter intercepts and modifies light at a plurality of said inlet ends of said light guides corresponding to said control position, said color filter having a length corresponding to at least all of said light guide inlet ends, at least one opening in said electrical socket for passing said color filter therethrough so that a portion of said color filter can be outside said socket, guide means for guiding and projecting said color filter through said socket opening, and a guide rail for guiding said control, whereby said control is a slide slidable in its longitudinal direction on said guide rail.
Dependencies are inferred from the claim text.