US4012750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera shutter with diaphragm and electro-magnetic drive for diaphragm
Assignee: Hittech Prontor GmbH
•
Filing: 1975-05-28
•
Granted: 1977-03-15
•
Expires: 1995-05-28
Abstract
Abstract A camera shutter assembly is provided having segments which may be moved by electro-magnetic means. The diaphragm blades are also provided with electro-magnetic means and there are mechanical intermediate members so that the blades can be moved into an open position. Subsequently, the blades can be closed to a predetermined aperture setting by spring means. By these means the photographer can move the shutter segments and the diaphragm blades into open positions and thereafter back into their original positions to make intermediate observations from a single location.
Inventors
- 👤 Waldemar T. Rentschler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:13
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/02; G03B9/07; G03B9/10; G03B9/18; G03B9/22; G03B9/58
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
Camera shutter assembly which comprises: shutter means having actuatable shutter segments for effecting shutter operation, shutter drive means including first electromagnetic means having an armature operatively arranged for actuating the shutter segments, diaphragm means having diaphragm aperture forming blades operatively arranged for actuation between an adjustable predetermined less than full size aperture operative setting position and a full size aperture position, return spring means normally biasing the diaphragm blades to the adjustable predetermined operative setting position, and diaphragm drive means including second electromagnetic means having an armature and independently adjustable mechanical intermediate members operatively arranged for forwardly actuating the diaphragm blades against the biasing force of the return spring means from such adjustable predetermined operative setting position to full size aperture position, said diaphragm means being returnable after such actuating to the adjustable predetermined operative setting position under the biasing force of the return spring means, the independently adjustable mechanical intermediate members being operatively interposed between the second electromagnetic means and the diaphragm means for adjustment independently of the second electromagnetic means to vary the predetermined size of the aperture of the operative setting position.
Claim 2
Dependent Claim
185 words
Camera shutter assembly which comprises: shutter means having actuatable shutter segments for effecting shutter operation, shutter drive means including first electromagnetic means having an armature operatively arranged for actuating the shutter segments, diaphragm means having diaphragm aperture forming blades operatively arranged for actuation between an adjustable predetermined less than full size aperture operative setting position and a full size aperture position, return spring means normally biasing the diaphragm blades to the adjustable predetermined operative setting position, and diaphragm drive means including second electromagnetic means having an armature and independently adjustable mechanical intermediate members operatively arranged for forwardly actuating the diaphragm blades against the biasing force of the return spring means from such adjustable predetermined operative setting position to full size aperture position, said diaphragm means being returnable after such actuating to the adjustable predetermined operative setting position under the biasing force of the return spring means, the independently adjustable mechanical intermediate members being operatively interposed between the second electromagnetic means and the diaphragm means for adjustment independently of the second electromagnetic means to vary the predetermined size of the aperture of the operative setting position.
Claim 3
Dependent Claim
58 words
Assembly according to claim 1 wherein control means are provided including switch means having a shutter operating switch position in which the first electromagnetic means for actuating the shutter segments are energizable and an intermediate object viewing switch position in which both such first electromagnetic means and the second electromagnetic means for actuating the diaphragm blades are energizable.
Claim 4
Dependent Claim
84 words
Assembly according to claim 1 wherein the mechanical intermediate members include a force transmission lever fixed to the armature of the second electromagnetic means, an independently adjustable diaphragm aperture setting member having a control cam formed thereon, and an intermediate adjustment lever linkage operatively adjustably interposed between the force transmission lever and the control cam for setting the size of the aperture of the operative setting position of the diaphragm means in dependence upon the position of adjustment of the diaphragm aperture setting member.
Claim 5
Dependent Claim
16 words
Assembly according to claim 3 wherein the diaphragm aperture setting member is arranged for manual adjustment.
Claim 6
Dependent Claim
154 words
Assembly according to claim 3 wherein control means are provided including switch means having a shutter operating switch position in which the first electromagnetic means for actuating the shutter segments are energizable and an intermediate object viewing switch position in which both such first electromagnetic means and the second electromagnetic means for actuating the diaphragm blades are energizable, and further including manually actuatable rotatable selector means and cooperating push button depressable means, said rotatable selector means being movable to one position corresponding to the intermediate object viewing switch position for thereupon energizing simultaneously both the first and second electromagnetic means for actuating both the shutter segments and the diaphragm blades for intermediate object viewing and another position at which the push button means are in turn depressable to a depressed position corresponding to the shutter operating switch position for thereupon energizing only the first electromagnetic means for actuating the shutter segments for shutter operation.
Claim 7
Dependent Claim
42 words
Assembly according to claim 5 wherein the control means are in the form of a separate control device operatively connected to the shutter assembly by a cable containing corresponding energizing leads from the switch means to the first and second electromagnetic means.
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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |