US3712202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple shutter system for cameras and projectors
Assignee: DU PONT M US
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Filing: 1971-06-16
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Granted: 1973-01-23
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Expires: 1991-06-16
Abstract
Abstract Side by side columns each comprising a plurality of shutters are positioned to co-operate with a rectangular array of lenses such that operation of any one shutter permits light to pass through an associated lens. The shutters take the form of axially aligned cylinders individually rotatably mounted to form the columns. Each cylinder has a lateral bore such that in one rotated position light is blocked and in a second rotated position light can pass through the bore. A variable speed drive motor with cooperating drive shafts applies rotative biasing forces on all of the cylinders simultaneously. Stop means associated with each of the cylinders holds the cylinders in their first rotated or light blocking positions. Individual operation of any one stop means serves to release the cylinder momentarily to permit it to make a half rotation whereby it passes throught its second rotated position to permit light to pass through the associated lens. The stop means may be designed such that the cylinder can be stopped in its second rotated position for any desired length of time.
Inventors
- 👤 P Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:07
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/52
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
237 words
A multiple shutter system for blocking or passing light through one or more selected lens in a rectangular multiple lens array, comprising, in combination: a. a plurality of individual cylinders, equal in number to the number of lenses, associated respectively with the lenses, said cylinders being mounted in side by side columns, the cylinders in each column being axially aligned and individually rotatable, each cylinder having a bore passing laterally therethrough so that in a first rotated position light is blocked from passing through the bore and associated lens and in a second rotated position light is passed through the bore and associated lens; b. drive shafts passing parallel to the columns respectively and frictionally engaging the lateral sides of the cylinders in the columns so that rotation of the drive shafts places a constant biasing rotative force on each of the cylinders; c. a variable speed motor coupled to rotate said drive shafts at a given selected speed; and d. stop means associated with each cylinder normally holding said cylinders in their first rotated positions and responsive to an individual electrical signal to disengage and engage said cylinder thereby permitting said cylinder to effect one half a rotation between the times of engagement and disengagement so that the cylinder passes through said second rotated position to pass light through its associated lens for a time determined by the selected speed of rotation of said drive shafts.
Claim 2
Dependent Claim
237 words
A multiple shutter system for blocking or passing light through one or more selected lens in a rectangular multiple lens array, comprising, in combination: a. a plurality of individual cylinders, equal in number to the number of lenses, associated respectively with the lenses, said cylinders being mounted in side by side columns, the cylinders in each column being axially aligned and individually rotatable, each cylinder having a bore passing laterally therethrough so that in a first rotated position light is blocked from passing through the bore and associated lens and in a second rotated position light is passed through the bore and associated lens; b. drive shafts passing parallel to the columns respectively and frictionally engaging the lateral sides of the cylinders in the columns so that rotation of the drive shafts places a constant biasing rotative force on each of the cylinders; c. a variable speed motor coupled to rotate said drive shafts at a given selected speed; and d. stop means associated with each cylinder normally holding said cylinders in their first rotated positions and responsive to an individual electrical signal to disengage and engage said cylinder thereby permitting said cylinder to effect one half a rotation between the times of engagement and disengagement so that the cylinder passes through said second rotated position to pass light through its associated lens for a time determined by the selected speed of rotation of said drive shafts.
Claim 3
Dependent Claim
81 words
The subject matter of claim 1, in which each of said stop means includes a solenoid and plunger, the associated cylinder having at least two diametrically opposite catch means for engagement by said plunger so that disengagement of the cylinder is effected by retracting said plunger from one of the catch means to release the cylinder and extension of said plunger positions it to engage the other of said catch means after rotation of the cylinder through one half a revolution.
Claim 4
Dependent Claim
42 words
The subject matter of claim 2, in which there are provided four catch means on each cylinder equally circumferentially spaced at 90* so that said cylinder may be engaged and stopped in its second rotated position for any desired length of time.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |