Photographic apparatus with plurality of selectively determinable operational modes

• US 4,007,469 A
• Filed: 04/21/1975
• Issued: 02/08/1977
• Est. Priority Date: 04/21/1975
• Status: Expired due to Term

• Current Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Land, Edwin H., Kee, Richard C.
• Primary Examiner(s): Hix, L. T.
• Assistant Examiner(s): LaBarre, J. A.
• Application Number:
  US05/570,165
• Time in Patent Office: 659 Days
• Field of Search: 354/27, 354/32-35, 354/53, 354/126-128, 354/129, 354/133, 354/145, 354/207, 354/230
• US Class Current: 396/169
• CPC Class Codes: G03B 15/03 Combinations of cameras with lighting apparatus; Flash units
• CPC Class Codes: G03B 2215/0503 Built-in units
• CPC Class Codes: G03B 7/097 for control of both exposure time and aperture
• CPC Class Codes: G03B 7/16 in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera

Abstract

A camera is provided with a built-in electronic flash unit, a viewfinder for simultaneously framing an image and for selectively displaying a number of indications, a circuit for sensing the state of charge of the flash unit and the ambient light level, a pair of shutter buttons, and apparatus controlled by both the shutter buttons and the sensing circuit for selectively making a flash exposure, making an ambient light exposure, or displaying an appropriate indication to the operator.

Claims

1. In combination with a camera having shutter means operable to make an exposure by opening and closing an optical path in said camera, rechargeable electronic flash means effective when charged to produce an illuminating flash of light in response to an applied trigger signal, charging means operable to charge said flash means, charge sensing means for producing a first signal when said flash means is charged and a second signal when said flash means is not charged, register means settable to first and second states, means controlled by said register means in its first state for operating said charging means to charge said flash means, light sensing means responsive to the level of ambient light confronting said camera for producing a third signal when said level is above a predetermined value and a fourth signal when said level is below said predetermined value, first control means manually operable from a first state to a second state, second control means manually operable from a first state to a second state, means operated by both said control means and said light sensing means for producing a fifth signal when said first control means is in its second state, said second control means is in its first state and said third signal is present, means responsive to said fifth signal for operating said shutter means, means operated by said control means, said charge sensing means and said light sensing means for producing a sixth signal when said first control means is in its first state, said second control means is in its second state, and said first and fourth signals are present, means responsive to said sixth signal for operating said shutter means, means enabled by said sixth signal and controlled by said shutter means for applying a trigger signal to said flash means, means responsive to said trigger signal for setting said register means to its second state, and means controlled by said control means and said sensing means for setting said register means to its first state when said first control means is in its first state, said second control means is in its second state, and said second and fourth signals are present.

2. The apparatus of claim 1, in which said means for setting said register to its second state includes means responsive to said fifth signal for setting said register to its second state.

3. The apparatus of claim 1, in which said means for setting said register to its first state includes means effective when said register is in said second state and operated by said control means and said light sensing means for setting said register to its first state when said first control means is in its second state, said second control means is in its first state, and said fourth signal is present.

4. The apparatus of claim 3, in which said means for setting said register to its second state includes means responsive to said fifth signal for setting said register to its second state.

5. The apparatus of claim 1, further comprising first visual indicating means operated by said control means and said sensing means for producing a first visible signal when said first control means is in its second state, said second control means is in its first state, and said first and said fourth signals are present, second visual indicating means operated by said control means and said light sensing means for producing a second visible signal when said first control means is in its first state, said second control means is in its second state, and said third signal is present, and third visual indicating means operated by said control means and said sensing means for producing a third visible signal when said first control means is in its first state, said second control means is in its second state, and said second and said fourth signals are present.

6. A photographic camera apparatus of the type which may be used with a source of artificial illumination;

said camera comprising;

a housing having a scene light admitting aperture therethrough;

means for defining a film exposure plane within said housing;

means for blocking and unblocking the impingement of scene light on said exposure plane from said aperture to define a photographic exposure interval;

first manually operable and electrically energizable control means for providing a first signal responsive to the manual operation thereof;

second manually operable and electrically energizable control means for providing a second signal responsive to the manual operation thereof;

scene light detecting means for providing a select output signal responsive to the detection of ambient scene light above a predetermined level; and

electrically energizable circuit means, responsive to said first signal resulting from the manual operation of said first control means without the manual operation of said second control means in the presence of said select output signal from said scene light detecting means, for actuating said scene light blocking and unblocking means to effect a photographic exposure cycle, said circuit means being alternately responsive to said first signal in the absence of said select output signal from said scene light detecting means for enabling the source of artificial illumination from its normal state of unreadiness to a state of readiness thereby accommodating its illumination upon application of an appropriate trigger signal thereto, said circuit means also being responsive to said second signal resulting from the manual operation of said second control means without the manual operation of said first control means in the absence of said select output signal from said scene light detecting means for also enabling the source of artificial illumination from its normal state of unreadiness to a state of readiness when said source of artificial illumination is already in said state of unreadiness and alternatively for actuating said scene light blocking and unblocking means for effecting a photographic exposure cycle while also providing said trigger signal to cause the illumination of the source of artificial illumination during the exposure cycle when the source of artificial illumination is already in said state of readiness.

7. The photographic apparatus of claim 6 wherein said circuit means includes means responsive to a subsequent reappearance of said first signal resulting from a second manual operation of said first control means following a first manual operation of said first control means while in the absence of said select signal from said scene light detecting means, said second manual operation of said first means occurring without the operation of said second control means while also in the absence of said select output signal from said scene light detecting means for returning the source of artificial illumination to its said state of unreadiness.

8. The photographic apparatus of claim 6 wherein said circuit means includes means responsive to said first signal in the absence of said select output signal from said scene light detecting means for providing a third signal indicative of when the ambient scene light is inadequate for a photographic exposure cycle without artificial illumination, said circuit means also including means responsive to said second signal in the presence of said select output signal from said scene light detecting means for providing a fourth signal indicative of when the ambient scene light is adequate for a photographic exposure cycle without artificial illumination, said photographic apparatus also including normally inoperative means for producing a readily discernable signal to the camera operator in response to said third and fourth signals.

9. The photographic apparatus of claim 8 wherein said circuit means includes means responsive to said second signal in the absence of said select output signal from said scene light detecting means when the source of artificial illumination is in a state of unreadiness for providing a readily discernable signal to the camera operator to wait for the source of artificial illumination to be changed to a state of readiness.

10. The photographic apparatus of claim 6 wherein the source of artificial illumination is a strobe and the strobe is enabled to a state of readiness by being fully charged.

11. The photographic apparatus of claim 6 wherein the circuit means includes means responsive to the simultaneous occurrence of said first and second signals resulting from the simultaneous manual operation of said first and second control means for actuating said scene light blocking and unblocking means to effect a photographic exposure cycle subsequent to the expiration of a predetermined time delay after the manual operation of said first and second control means.

12. The photographic apparatus of claim 11 including:

third manually operable and electrically energizable control means for simultaneously controlling the electrical energization of said first and second control means as well as said circuit means in response to normal gripping of the camera apparatus by a user wherein said circuit means additionally responds to the simultaneous occurrence of said first and second signals for maintaining said electrical energization of said first and second control means as well as said circuit means regardless of the manual operation of said third control means.

13. A photographic camera apparatus of the type which may be used with a source of artificial illumination;

said camera comprising;

a housing having a scene light admitting aperture therethrough;

means for defining a film exposure plane within said housing;

means for blocking and unblocking the impingement of scene light on said exposure plane from said aperture to define a photographic exposure interval;

first manually operable and electrically energizable control means for providing a first signal responsive to the manual operation thereof;

second manually operable and electrically energizable control means for providing a second signal responsive to the manual operation thereof;

scene light detecting means for providing a select output signal responsive to the detection of ambient scene light above a predetermined level; and

electrically energizable circuit means responsive to said first signal resulting from the manual operation of said first control means without the manual operation of said second control means in the presence of said select output signal from said scene light detecting means for actuating said scene light blocking and unblocking means to effect a photographic exposure cycle, said circuit means also being responsive to said second signal resulting from the manual operation of said second control means without the manual operation of said first control means in the absence of said select output signal from said scene light detecting means for actuating said scene light blocking and unblocking means for effecting a photographic exposure cycle while also providing a trigger signal for effecting the illumination of the source of artificial illumination during the exposure cycle, said circuit means additionally being responsive to the simultaneous occurrence of said first and second signals resulting from the simultaneous manual operation of said first and second control means for actuating said scene light blocking and unblocking means to effect a photographic exposure cycle subsequent to the expiration of a predetermined time delay after the simultaneous manual operation of said first and second control means.

14. The photographic apparatus of claim 13 including:

third manually operable and electrically energizable control means for simultaneously controlling the electrical energization of said first and second control means as well as said circuit means in response to normal gripping of the camera apparatus by a user wherein said circuit means additionally responds to the simultaneous occurrence of said first and second signals for maintaining said electrical energization of said first and second control means as well as said circuit means regardless of the manual operation of said third control means.

15. A photographic camera apparatus of the type which may be used with a source of artificial illumination and which may also provide three different photographic exposure modes of operation including ambient and artificial scene lighted exposure cycles wherein said camera comprises:

a housing having a scene light admitting aperture therethrough;

means for defining a film exposure plane within said housing;

means for blocking and unblocking the impingement of scene light on said exposure plane from said aperture to define a photographic exposure interval;

first manually operable and electrically energizable control means for providing a first signal responsive to the manual operation thereof;

second manually operable and electrically energizable control means for providing a second signal responsive to the manual operation thereof; and

electrically energizable circuit means, responsive to said first signal resulting from the manual operation of said first control means without the manual operation of said second control means, for effecting a first of said three different photographic exposure modes of operation, said circuit means also being responsive to said second signal resulting from the manual operation of said second control means without the manual operation of said first control means for effecting a second of said three different photographic exposure modes of operation, said circuit means further being responsive to the simultaneous manual operation of said first and second control means for effecting a third of said three different photographic exposure modes of operation.

16. A photographic camera apparatus of the type which may be used with a source of artificial illumination;

said camera comprising;

a housing having a scene light admitting aperture therethrough;

means for defining a film exposure plane within said housing;

means for blocking and unblocking the impingement of scene light on said exposure plane from said aperture to define a photographic exposure interval;

manually operable and electrically energizable control means for providing a signal responsive to the manual operation thereof;

scene light detecting means for providing a select output signal responsive to the detection of ambient scene light intensity above a predetermined level; and

electrically energizable circuit means, responsive to said signal resulting from the manual operation of said control means in the presence of said select output signal from said scene light detecting means, for actuating said scene light blocking and unblocking means to effect a photographic exposure cycle, said circuit means being alternately responsive to said signal resulting from the manual operation of said control means in the absence of said select output signal from said scene light detecting means for enabling the source of artificial illumination from its normal state of unreadiness to a state of readiness thereby accommodating its illumination upon application of an appropriate trigger signal thereto.

17. The photographic apparatus of claim 16 wherein said circuit means includes means responsive to a subsequent reappearance of said signal resulting from a second manual operation of said control means following a first manual operation of said control means while in the absence of said select signal from said scene light detecting means, said second manual operation of said control means occurring while also in the absence of said select output signal from said scene light detecting means for returning the source of artificial illumination to its normal state of unreadiness.

18. A photographic camera apparatus of the type which may be used with a source of artificial illumination;

said camera comprising;

a housing having a scene light admitting aperture therethrough;

means for defining a film exposure plane within said housing;

means for blocking and unblocking the impingement of scene light on said exposure plane from said aperture to define a photographic exposure interval;

manually operable and electrically energizable control means for providing a signal responsive to the manaul operation thereof;

electrically energizable circuit means, responsive to said signal resulting from the manual operation of said control means for enabling the source of artificial illumination from its normal state of unreadiness to a state of readiness thereby accommodating its illumination upon application of an appropriate trigger signal thereto;

said circuit means also being responsive to a subsequent reappearance of said signal resulting from a second manual operation of said control means following a first manual operation of said control means as well as the completion of the enablement of the source of artificial illumination into its state of readiness, said second manual operation of the control means operating to actuate said scene light blocking and unblocking means for effecting a photographic exposure interval while also providing said trigger signal to cause the illumination of the source of artificial illumination during the exposure interval; and

normally inoperative means for producing a readily discernable signal to the operator in response to said source of artificial illumination reaching its state of readiness.

19. A photographic camera apparatus of the type which may be used with a source of artificial illumination;

said camera comprising;

a housing having a scene light admitting aperture therethrough;

means for defining a film exposure plane within said housing;

means for blocking and unblocking the impingement of scene light on said exposure plane from said aperture to define a photographic exposure interval;

first manually operable and electrically energizable control means for providing a first signal responsive to the manual operation thereof;

second manually operable and electrically energizable control means for providing a second signal responsive to the manual operation thereof;

scene light detecting means for providing a select output signal responsive to the detection of ambient scene light above a predetermined level;

electrically energizable circuit means, responsive to said first signal resulting from the manual operation of said first control means without the manual operation of said second control means in the presence of said select signal from said scene light detecting means, for actuating said scene light blocking and unblocking means to effect a photographic exposure cycle, said circuit means also being responsive to said second signal resulting from the manual operation of said second control means without the manual operation of said first control means in the absence of said select output signal from said scene light detecting means for effecting a specific function associated with the artificial illumination of a subject during a photographic exposure cycle, said circuit means alternatively being responsive to said second signal from the manual operation of said second control means without the manual operation of said first control means in the presence of said select output signal from said scene light detecting means for terminating any further functions relative to the implementation of a photographic exposure cycle.

20. The photographic apparatus of claim 19 wherein said circuit means includes means responsive to said second signal from the manual operation of said second control means without the manual operation of said first control means in the presence of said select output signal from said scene light detecting means for providing a third output signal, said photograhic apparatus further including normally inoperative means for producing a readily discernable signal indicating to the camera user that he should now manually operate said first control means in response to said third output signal from said circuit means.