US3785260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hammer-driven shutter and percussion ignition system
Assignee: Simpro Corp of America
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Filing: 1972-11-09
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Granted: 1974-01-15
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Expires: 1992-11-09
Abstract
Abstract A hammer-driven shutter and flashlamp igniting system for cameras adapted for use with percussion-ignitable flash-lamps. The shutter system consists of two overlapping shutterblades which co-act to open the camera exposure aperture radially outwardly from the center, and co-act to close the camera exposure radially inwardly toward the center. A flashlamp firing pin is integral with one of said shutter-blades, and it is movable into and out of percussion igniting position in synchronization with the operation of said shutterblade.
Inventors
- 👤 I Penick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:19
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/70; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0478; G03B15/0489
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
A shutter system for cameras having a film exposure aperture in a wall, said shutter system comprising: a. a first shutterblade which is mounted for pivotal movement relative to the exposure aperture in said wall, b. a second shutterblade which is carried by the first shutterblade and movable therewith, c. said second shutterblade being pivotally connected to said first shutterblade for pivotal movement relative thereto and relative to said exposure aperture, d. said first and second shutterblades being normally in overlapping positions relative to the exposure aperture to close same, e. actuating means causing said first and second shutterblades to pivot out of overlapping positions relative to said exposure aperture to open same, f. drive means which pivots the first shutterblade in a first direction, and g. limit means which engages the second shutterblade and causes it to pivot in the opposite direction while the first shutterblade pivots in the first direction.
Claim 2
Dependent Claim
152 words
A shutter system for cameras having a film exposure aperture in a wall, said shutter system comprising: a. a first shutterblade which is mounted for pivotal movement relative to the exposure aperture in said wall, b. a second shutterblade which is carried by the first shutterblade and movable therewith, c. said second shutterblade being pivotally connected to said first shutterblade for pivotal movement relative thereto and relative to said exposure aperture, d. said first and second shutterblades being normally in overlapping positions relative to the exposure aperture to close same, e. actuating means causing said first and second shutterblades to pivot out of overlapping positions relative to said exposure aperture to open same, f. drive means which pivots the first shutterblade in a first direction, and g. limit means which engages the second shutterblade and causes it to pivot in the opposite direction while the first shutterblade pivots in the first direction.
Claim 3
Dependent Claim
75 words
A shutter system in accordance with claim 1, wherein: a. the second shutterblade is spring biased in the first direction, and b. the first shutterblade is spring biased in the opposite direction, c. said drive means consisting of spring-biased hammer means engageable with the first shutterblade to cause it to pivot in said first direction and thereby to cause the second shutterblade to bear against the limit means and to pivot in said opposite direction.
Claim 4
Dependent Claim
84 words
A shutter system in accordance with claim 2, wherein: a. a trigger is movably mounted on adjacent said sPring-biased hammer means, b. said trigger having sear lock means which locks the hammer means in cocked position against the spring bias, c. whereby actuation of the trigger disengages the sear lock means from the hammer means to release said hammer means for spring-thrust engagement with the first shutterblade, d. thereby causing the first and second shutterblades to pivot and to expose the film exposure aperture.
Claim 5
Dependent Claim
74 words
A shutter system in accordance with claim 3, wherein the spring-biased hammer means comprises: a. a hammer-drive bar mounted for longitudinal movement, b. a spring connected between said hammer-drive bar and the wall of the camera body, c. a reset handle on said hammer-drive bar for moving said bar relative to said wall to load said spring, and d. a cam-faced hammer element on said hammer-drive bar positioned for engagement with said first shutterblade.
Claim 6
Dependent Claim
94 words
A shutter system in accordance with claim 3, wherein the trigger comprises: a. a pivotally mounted spring-biased member, b. said sear lock means being provided on said pivotally mounted member on one side of its pivot, and c. trigger means provided on said pivotally mounted member on the opposite side of its pivot, d. said pivotally mounted member being pivotally movable in one direction to cause its sear lock means to engage said hammer means, and being pivotally movable in the opposite direction to cause the sear lock means to disengage the hammer means.
Claim 7
Dependent Claim
53 words
A shutter system in accordance with claim 3, wherein: a. the camera is provided with a flashcube holder adjacent the first shutterblade, b. said first shutterblade having a firing pin connected therewith for percussion engagement with a flashcube in said holder when the first shutterblade is spring-driven to film exposure aperture exposing position.
Claim 8
Dependent Claim
62 words
A shutter system in accordance with claim 6, wherein: a. the flashcube holder is rotatably mounted for sequentially advancing its individual flashlamps to firing position, b. a ratchet drive mechanism connected to said flashcube holder and operable by means of said hammer-drive bar, and c. indexing means connected to said flashcube holder for sequentially aligning its individual flashlamps with the firing pin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |