Abstract A system for indicating photographic information which includes a circuit for converting an optical signal into an electrical signal. Comparing elements are provided for comparing the electrical signal with one of a plurality of reference signals having different levels, and electrical elements serve to produce an indication signal responsive to the output from one of the comparing elements. A plurality of luminescent components are connected to the signal producing element for turning-on in response to an indication signal. A plurality of indicating segments indicate the photographic information which the luminescent elements irradiate, the number of indicating segments being less than the number of luminescent elements and at least one of the indicating elements is selectively illuminated by more than one of the luminescent elements. The indicating segments have different colors to indicate different kinds of photographic information, whereby one indicating segment is capable of indicating two different modes of operation of the system. This is a continuation of application Ser. No. 437,621 filed Jan. 29, 1974, now abandoned.
Inventors
👤 Soichi Nakamoto
👤 Tadashi Ito
👤 Fumio Ito
👤 Yasuo Isobe
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-30 18:12
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18; G03B17/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A system for indicating shutter speeds of a camera comprising: a plurality of segments each having a coded integer, which represents both a first shutter speed equal in seconds to the integer and a second shutter speed equal in seconds to the reciprocal of the integer; a plurality of means each responsive to an indication signal for illuminating the coded integer of its associated one of said segments; means for representing that the integer, when illuminated, is indicative of the associated first shutter speed; and control circuitry including: a plurality of means for producing the indication signals to activate said plurality of illuminating means, at least one of said plurality of illuminating means being activated selectively by two of said plurality of indication signal producing means; and an additional circuit for activating said representing means, whereby the integer, when illuminated with said representing means, represents the associated first shutter speed, and, when illuminated without activating said representing means, represents the associated second shutter speed.
Claim 2
Independent Claim
164 words
A system for indicating shutter speeds of a camera comprising: a plurality of segments each having a coded integer, which represents both a first shutter speed equal in seconds to the integer and a second shutter speed equal in seconds to the reciprocal of the integer; a plurality of means each responsive to an indication signal for illuminating the coded integer of its associated one of said segments; means for representing that the integer, when illuminated, is indicative of the associated first shutter speed; and control circuitry including: a plurality of means for producing the indication signals to activate said plurality of illuminating means, at least one of said plurality of illuminating means being activated selectively by two of said plurality of indication signal producing means; and an additional circuit for activating said representing means, whereby the integer, when illuminated with said representing means, represents the associated first shutter speed, and, when illuminated without activating said representing means, represents the associated second shutter speed.
Claim 3
Dependent Claim
15 words
A system in accordance with claim 1, wherein said representing means comprises an overflow indicator.
Claim 4
Dependent Claim
21 words
A system in accordance with claim 2, wherein said plurality of segments are arranged in a finder field of the camera.