US3595153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically operated shutter
Assignee: Tektronix Inc
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Filing: 1969-07-28
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Granted: 1971-07-27
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Expires: 1989-07-28
Abstract
Abstract A camera shutter, actuated to its open position by an electrically operated solenoid, provides a settable aperture opening. The stroke of the solenoid mechanism is constant for opening and closing the shutter, and an actuator arm between the solenoid and the shutter drive ring is rotatable upon an adjustable cam operated pivot for predetermining the shutter-open aperture. A second solenoid is employed for closing the shutter, while detent means holds the shutter in either open or closed position.
Inventors
- 👤 Ivar Saul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:12
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/10; G03B9/18; G03B9/22; G03B9/58
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
An electrically operated shutter comprising: a drive ring and a plurality of blades positioned therewithin and pivotally connected to said drive ring for opening and closing in response to rotation of said drive ring, an actuator arm rotatably connected to said drive ring for opening and closing said blades as said actuator arm rotates said drive ring, electromagnetic means for operating said actuator arm through predetermined angles of rotation, said electromagnetic means having a given stroke for imparting a predetermined linear motion to a portion of said actuator arm, an adjustable pivot for said actuator arm located between said electromagnetic means and said drive ring and about which said actuator arm pivots, a cam for adjusting the aperture of said shutter, and cam follower means for positioning said adjustable pivot in response to the position of said cam, the position of said adjustable pivot determining the amount of rotation of said drive ring when said actuator arm is operated by said electromagnetic means for in turn determining the aperture opening of said shutter.
Claim 2
Dependent Claim
173 words
An electrically operated shutter comprising: a drive ring and a plurality of blades positioned therewithin and pivotally connected to said drive ring for opening and closing in response to rotation of said drive ring, an actuator arm rotatably connected to said drive ring for opening and closing said blades as said actuator arm rotates said drive ring, electromagnetic means for operating said actuator arm through predetermined angles of rotation, said electromagnetic means having a given stroke for imparting a predetermined linear motion to a portion of said actuator arm, an adjustable pivot for said actuator arm located between said electromagnetic means and said drive ring and about which said actuator arm pivots, a cam for adjusting the aperture of said shutter, and cam follower means for positioning said adjustable pivot in response to the position of said cam, the position of said adjustable pivot determining the amount of rotation of said drive ring when said actuator arm is operated by said electromagnetic means for in turn determining the aperture opening of said shutter.
Claim 3
Dependent Claim
42 words
The shutter according to claim 1 wherein said electromagnetic means is provided with a latch means for yieldably holding said electromagnetic means alternately in positions corresponding to reverse ends of the stroke thereof and to closed and open positions of said shutter.
Claim 4
Dependent Claim
43 words
The shutter according to claim 2 wherein said electromagnetic means comprises a pair of solenoids with a common plunger pivotally connected to said actuator arm, and wherein said latch means comprises a detent for engaging said actuator arm in opposite stroke positions thereof.
Claim 5
Dependent Claim
56 words
The shutter according to claim 1 wherein said cam follower means includes a cam follower engaging said cam, a first rack in line with said cam follower and imparted linear motion from said cam follower, a pinion engaging said first rack, and a second rack also engaging said pinion, said second rack supporting said adjustable pivot.
Claim 6
Dependent Claim
20 words
The shutter according to claim 4 wherein said first and second racks are disposed at substantially 90* to one another.
Claim 7
Dependent Claim
27 words
The shutter according to claim 1 wherein said actuator arm is provided with a slot along which said adjustable pivot is movable by said cam follower means.
Claim 8
Dependent Claim
70 words
The shutter according to claim 3 wherein said solenoids are positioned in line, and said plunger is pivotally connected to said actuator arm therebetween, with said detent also being located between said solenoids, each of said solenoids having a set screws at the end thereof opposite from said actuator arm, wherein said set screw is adjustable for limiting the length of stroke of said plunger for preliminary adjusting said shutter.
References Cited (Backward Citations)
US3466993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |