Electronic flash parameter calculator device

Claim 2

An exposure factor calculator for use in a flashing device for a cmaera, comprising: a first disk (8) having a bright colored portion (8d), a dark colored portion (8c), and film sensitivity graduations (8a) provided along a circumference thereof; a second disk (9) including an indicating portion (9e) for indicating one figure of said film sensitivity graduations (8a) and being rotatable relative to said first disk to be set in a position where said indicating portion (9e) selectively indicates one figure of said film sensitivity graduations (8a), said second disk (9) further having diaphragm value graduations (11) for a photographic lens provided along a circumference thereof and having the same color as said dark colored portion of said first disk, said bright colored portion having an extension corresponding to that of a range of said diaphragm value available for the indicated film sensitivity, and being so arranged as to be just positioned under said range and to make figures in said range visible, while said dark colored portion is so arranged as to be positioned under the outside of said range and to make such outside figures invisible; a third disk (6) having distance graduations (6a) along a circumference thereof; a pointer (12d) for indicating one figure of said diaphragm value graduations (11), said pointer (12d) being rotatable relative to said second disk to be set in a position where it points at one FIGURE of said diaphragm value graduations (11); and a fourth disk (7) having a transparent portion and an opaque portion, and being rotatable integrally with said pointer (12d) and relative to said third disk (6); said third disk (6), said fourth disk (7), and said pointer (12d) being so arranged that a range of said distance available for said pointed diaphragm value is positioned under said transparent portion of said fourth disk (7) and made visible with the outside of said range shielded by said opaque portion.

Claim 3

An exposure factor calculator comprising: a base structure (1) having projections (5a) projecting upwards therefrom; a first disc (8) having thereon film speed rating indicia (8a) spaced along a first predetermined circular path and a first range delineating portion having a bright colored area and a dark colored area and spaced along a second predetermined circular path, said first disc being fixed to said base structure by said projections; a second disc (9) including a transparent portion (9b) having lens diaphragm opening indicia (11) and an opaque portion (9c) having a window (9e), said second disc (9) being arranged on said first disc (8) coaxially therewith and adapted to be Rotatable relative to said first disc (8), said window (9e) being located along said first circular path so that one of said film speed rating indica (8a) is visible therethrough, and said lens diaphragm opening indicia (11) having the same color as said dark colored area of said first disc (8) and located along said second circular path so as to be in part visible on said bright colored area with the other part thereof superimposed on said dark colored area; a third disc (6) having distance indicia (6a) provided along a third predetermined circular path and arranged between said first disc (8) and said base structure (1) coaxially with said first disc, said third circular path being radially offset from said first circular path; an indicating member (12) having an indicating portion (12d), said indicating member being arranged on said second disc (9) coaxially with said first disc and adapted to be rotatable relative to said second disc (9) to be set in a position where said indicating portion (12d) selectively indicates one of said lens diaphragm opening indicia (11) on said second disc (9), and said indicating member (12) further having a projection (12a) projecting downwards therefrom and extending through said first and second discs; and a fourth disc (7) having a second range delineating portion consisting of a transparent area and an opaque area and arranged between said first disc (8) and said third disc (6) coaxially therewith, said second range delineating portion being located on said third circular path, and said fourth disc being fixed to said indicating member (12) by said projection (12a) so as to be integrally rotatable therewith and being adapted to be rotatable relative to said third disc so that a part of said distance indicia is visible through said transparent area of said second range delineating portion and said transparent portion (9b) of said second disc (9) with the other part of said distance indicia being shielded by said opaque portion thereof.

Claim 4

An exposure factor calculator comprising: a base structure (1) having projections (5a) projecting upwards therefrom; a first disc (8) having thereon film speed rating indicia (8a) spaced along a first predetermined circular path and a first range delineating portion having a bright colored area and a dark colored area and spaced along a second predetermined circular path, said first disc being fixed to said base structure by said projections; a second disc (9) including a transparent portion (9b) having lens diaphragm opening indicia (11) and an opaque portion (9c) having a window (9e), said second disc (9) being arranged on said first disc (8) coaxially therewith and adapted to be Rotatable relative to said first disc (8), said window (9e) being located along said first circular path so that one of said film speed rating indica (8a) is visible therethrough, and said lens diaphragm opening indicia (11) having the same color as said dark colored area of said first disc (8) and located along said second circular path so as to be in part visible on said bright colored area with the other part thereof superimposed on said dark colored area; a third disc (6) having distance indicia (6a) provided along a third predetermined circular path and arranged between said first disc (8) and said base structure (1) coaxially with said first disc, said third circular path being radially offset from said first circular path; an indicating member (12) having an indicating portion (12d), said indicating member being arranged on said second disc (9) coaxially with said first disc and adapted to be rotatable relative to said second disc (9) to be set in a position where said indicating portion (12d) selectively indicates one of said lens diaphragm opening indicia (11) on said second disc (9), and said indicating member (12) further having a projection (12a) projecting downwards therefrom and extending through said first and second discs; and a fourth disc (7) having a second range delineating portion consisting of a transparent area and an opaque area and arranged between said first disc (8) and said third disc (6) coaxially therewith, said second range delineating portion being located on said third circular path, and said fourth disc being fixed to said indicating member (12) by said projection (12a) so as to be integrally rotatable therewith and being adapted to be rotatable relative to said third disc so that a part of said distance indicia is visible through said transparent area of said second range delineating portion and said transparent portion (9b) of said second disc (9) with the other part of said distance indicia being shielded by said opaque portion thereof.

Claim 5

The calculator of claim 2 wherein said third disc (6) is independently rotatable relative to said first, second and fourth discs and said indicating member so that the visible part of said distance indicia varies in response to the rotation thereof.

Claim 6

The calculator of claim 3 further comprising a fifth disc arranged between said fourth disc and said base structure coaxially with said first to fourth discs and said indicating member is manually rotatable, said fifth disc being fixed to said third disc with projections upwards projecting therefrom so that the rotation thereof causes said third disc to rotate relative to said first, second and third discs and said indicating member.

Claim 7

An exposure factor calculator comprising: a first circular member (8) having thereon film speed rating indicia (8a) spaced along a first predetermined circular path and a first range delineating portion (8c) spaced along a second predetermined circular path, said first and second circular paths being radially offset from each other; a second circular member (9) having a transparent portion (9b), a first indicator (9e) and lens diaphragm opening indicia (11), said second circular member (9) being coaxially supported with said first circular member (8) and being rotatable relative to said first circular member (8) to be set in a position where said first indicator (9e) selectively indicates one of said film speed rating indicia (8a), said lens diaphragm opening indicia (11) lying along said second circular path so as to be visible in part and delineated by said first delineating portion (8c) of said first circular member (8); a third circular member (6) coaxially supported with said first and second circular members and having thereon distance designating indicia (6a) spaced along a third predetermined circular path, said third circular path being radially offset from said first and second circular Paths; an indicating member (12) having a second indicator (12d), said indicating member (12) being coaxially supported with said first to third circular members and rotatable relative to said second circular member (9) to be set in a position where said second indicator (12d) selectively indicates one of said lens diaphragm opening indicia (11); and a fourth circular member (7) coaxially supported with said first to third circular membvers and said indicating member and being rotatable integrally with said indicating member and relative to said third circular member, said fourth circular member having a second range delineating portion defined by a transparent border and lying along said third circular path, said distance indicia (6a) being visible in part through said transparent border of said second range delineating portion of said fourth circular member (7) and said transparent portion of said second circular member (9).

Claim 8

An exposure factor calculator comprising: a first circular member (8) having thereon film speed rating indicia (8a) spaced along a first predetermined circular path and a first range delineating portion (8c) spaced along a second predetermined circular path, said first and second circular paths being radially offset from each other; a second circular member (9) having a transparent portion (9b), a first indicator (9e) and lens diaphragm opening indicia (11), said second circular member (9) being coaxially supported with said first circular member (8) and being rotatable relative to said first circular member (8) to be set in a position where said first indicator (9e) selectively indicates one of said film speed rating indicia (8a), said lens diaphragm opening indicia (11) lying along said second circular path so as to be visible in part and delineated by said first delineating portion (8c) of said first circular member (8); a third circular member (6) coaxially supported with said first and second circular members and having thereon distance designating indicia (6a) spaced along a third predetermined circular path, said third circular path being radially offset from said first and second circular Paths; an indicating member (12) having a second indicator (12d), said indicating member (12) being coaxially supported with said first to third circular members and rotatable relative to said second circular member (9) to be set in a position where said second indicator (12d) selectively indicates one of said lens diaphragm opening indicia (11); and a fourth circular member (7) coaxially supported with said first to third circular membvers and said indicating member and being rotatable integrally with said indicating member and relative to said third circular member, said fourth circular member having a second range delineating portion defined by a transparent border and lying along said third circular path, said distance indicia (6a) being visible in part through said transparent border of said second range delineating portion of said fourth circular member (7) and said transparent portion of said second circular member (9).

Claim 9

The exposure calculator of claim 5 wherein said third circular member is arranged to be independently rotatable relative to said first, second and fourth circular members and said indicating member.