Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB34675/47A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IndividualfiledCriticalIndividual
Publication of GB635800ApublicationCriticalpatent/GB635800A/en
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B9/00—Exposure-making shutters; Diaphragms
G03B9/08—Shutters
G03B9/28—Roller blind or flexible plate
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Operating, Guiding And Securing Of Roll- Type Closing Members
(AREA)
Abstract
635,800. Photographic roller blind shutters. HASSELBLAD, F. V. Dec. 30, 1947, No. 34675. Convention date, June 16, 1944. [Class 98 (i)] The blinds 1 are thin metal foils corrugated at right angles to the direction of movement, the corrugations being of a smooth wave - form such as a sine wave. The blind tapes 2 may be formed integrally with the blinds, and may be similarly corrugated. The edge of the blind may be reinforced by a U- section metal strip 5, the bottom of which is cut away to enable it to grip the margins 7 of the blind from which the tapes extend.
GB34675/47A1944-06-161947-12-30Improvements in photographic focal-plane shutters of the curtain or roller-blind type
ExpiredGB635800A
(en)
Improvements in the device from shutter to venetian, provide them with double sliding sheets, suitable to reduce the penetration of the light in position of closure (Machine-translation by Google Translate, not legally binding)