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US3853396A Expired / Lapsed US ⏱️ 0.0 years remaining

Continuous photographing camera which can be driven with high speed by an auxiliary power source

Assignee: Canon Inc
•
Filing: 1973-09-06
•
Granted: 1974-12-10
•
Expires: 1993-09-06
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Abstract

Abstract The camera body contains an electric motor connected, in a supply circuit, to a built-in source of power such as a battery. A switch is included in the supply circuit and is operated by the release button to energize the motor to perform various operations such as film wind-up, shutter charging and release, and the like. A second and normally closed switch is included in the supply circuit and is opened by an operator projecting to the exterior of the camera body. A pair of exteriorly exposed terminals are connected to respective opposite ends of the normally closed switch. An auxiliary unit, for high speed operation of the camera, contains a built-in source of power, such as an electric battery, and has respective contacts engaging with the terminals of the camera body responsive to mounting of the auxiliary unit on the camera body by means of releasable latch means. The auxiliary unit has an abutment engageable with the operator of the normally closed switch to open the latter responsive to mounting of the auxiliary unit on the camera body and before the contacts of the auxiliary unit engage the terminals of the camera body. The battery is connected in circuit with the contacts of the auxiliary unit through a normally open switch which is closed by inward movement of one contact responsive to mounting of the auxiliary unit on the camera body. Thereby, when the auxiliary unit is mounted on the camera body, the two batteries are connected in series in the motor drive circuit and, when the auxiliary unit is dismounted from the camera body, the normally open switch in the auxiliary unit is opened responsive to such dismounting.

Inventors

  • 👤 M Ogiso
  • 👤 H Aizawa
  • 👤 S Kozuki

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 19:54
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 194 words
An Electric driving system, for a still camera including walls forming a camera main body, comprising, in combination, a main electric power source mounted in said main body; motor operated driving means in said body operable, when connected to said source, to perform functions of the camera including film wind-up and shutter charging and release; a normally closed switch means in said main body in series in a supply circuit connecting said driving means to said source; a pair of first terminals, on a wall of said body, connected to respective opposite ends of said switch means; and an auxiliary power source device including a casing constructed for disengageable coupling to said body wall carrying said first terminals, an auxiliary power source in said casing and a pair of second terminals on said casing connected to respective opposite terminals of said auxiliary power source and each engageable with a respective first terminal upon coupling of said casing to said body; said normally closed switch means being opened responsice to coupling of said casing to said body whereby said main and auxiliary power sources are connected in series with each other responsive to such coupling.
Claim 2
Dependent Claim 194 words
An Electric driving system, for a still camera including walls forming a camera main body, comprising, in combination, a main electric power source mounted in said main body; motor operated driving means in said body operable, when connected to said source, to perform functions of the camera including film wind-up and shutter charging and release; a normally closed switch means in said main body in series in a supply circuit connecting said driving means to said source; a pair of first terminals, on a wall of said body, connected to respective opposite ends of said switch means; and an auxiliary power source device including a casing constructed for disengageable coupling to said body wall carrying said first terminals, an auxiliary power source in said casing and a pair of second terminals on said casing connected to respective opposite terminals of said auxiliary power source and each engageable with a respective first terminal upon coupling of said casing to said body; said normally closed switch means being opened responsice to coupling of said casing to said body whereby said main and auxiliary power sources are connected in series with each other responsive to such coupling.
Claim 3
Dependent Claim 54 words
An electric driving system for a still camera, as claimed in claim 1, including a normally open switch means in said casing connected between one second terminal and said auxiliary power source and closed responsive to coupling of said casing to said body and opened responsive to uncoupling of said casing from said body.
Claim 4
Dependent Claim 95 words
An electric driving system for a still camera, as claimed in claim 1, in which said normally closed switch means includes a fixed contact and a movable contact; a member slidably mounted in the body wall carrying said first terminals to project somewhat therefrom; said member being aligned with said movable contact and normally occupying a first position out of engagement with said movable contact; said member, responsive to coupling of said casing to said body, being moved to a second position engaging said movable contact and disengaging said movable contact from said fixed contact.
Claim 5
Dependent Claim 40 words
An electric driving system for a still camera, as claimed in claim 3, including an abutment on said casing engageable with said member to displace said member to said second position responsive to coupling of said casing to said body.
Claim 6
Dependent Claim 97 words
An electric driving system for a still camera, as claimed in claim 2, in which said normally open switch means comprises a fixed contact and said one second terminal; said one second terminal being slidably mounted in said casing for movement between a normal first position in which it is out of engagement with said fixed contact of said normally open switch and a second position in which it engages said fixed contact of said normally open switch; said one second terminal being moved to said second position responsive to coupling of said casing to said body.

References Cited (Backward Citations)

US3528352A Cited
DE1300006B Cited
US3587425A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-12-09 1978-06-10 1978-12-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-12-09 1982-06-10 1982-12-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-12-09 1986-06-10 1986-12-10 $7700.00 Window Closed / Lapsed

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