GB383224A - Improvements in and relating to shutters - Google Patents

Improvements in and relating to shutters

Info

Publication number
GB383224A
GB383224A GB1812832A GB1812832A GB383224A GB 383224 A GB383224 A GB 383224A GB 1812832 A GB1812832 A GB 1812832A GB 1812832 A GB1812832 A GB 1812832A GB 383224 A GB383224 A GB 383224A
Authority
GB
United Kingdom
Prior art keywords
ring
blades
spring
frame
pressed
Prior art date
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
GB1812832A
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 Individual filed Critical Individual
Priority to GB1812832A priority Critical patent/GB383224A/en
Publication of GB383224A publication Critical patent/GB383224A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • 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
    • G03B9/46—Flap shutters pivoting about axis in plane of flap
    • G03B9/50—Louvre type

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wind Motors (AREA)

Abstract

383,224. Flash signals. WILLIAMSON, C. M., Cascade Works, Litchfield Gardens, Willesden Green, London. June 27, 1932, No. 18128. Addition to 365,224. [Class 118 (ii).] The blades 1 of a shutter according to the parent Specification are of different length and pivot within a mounting ring 3. This ring is secured to a mount 6 by bolts 7 and eccentric collars 8 which centre and form bearing surfaces for a rotatable ring 5 carrying the operating triggers 4. The upper and lower sets of blades are caused to rotate in opposite directions by arranging the corresponding lugs 1a on the blades on opposite sides and the operating triggers 4 in opposite quadrants of the ring 5. The middle blade 1c is shown associated with the lower set of blades. The ring 5 is held against the frame 3 by screws 11 passing through slots 12 in the ring, and is pressed against the heads of the screws by spring-pressed balls 9 in the mounting ring 3. Alternatively the ring 5 may be pressed against the frame 3 by spring- pressed balls in the frame 6. The ring 5 is operated by a crank pin 13 working in a slotted arm 15 of the ring which is also provided with a spring 16.
GB1812832A 1932-06-27 1932-06-27 Improvements in and relating to shutters Expired GB383224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1812832A GB383224A (en) 1932-06-27 1932-06-27 Improvements in and relating to shutters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1812832A GB383224A (en) 1932-06-27 1932-06-27 Improvements in and relating to shutters

Publications (1)

Publication Number Publication Date
GB383224A true GB383224A (en) 1932-11-10

Family

ID=10107135

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1812832A Expired GB383224A (en) 1932-06-27 1932-06-27 Improvements in and relating to shutters

Country Status (1)

Country Link
GB (1) GB383224A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2995997A (en) * 1957-05-02 1961-08-15 Optische Ind De Oude Delft Nv Mirror camera provided with a diaphragm

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2995997A (en) * 1957-05-02 1961-08-15 Optische Ind De Oude Delft Nv Mirror camera provided with a diaphragm

Similar Documents

Publication Publication Date Title
GB1502009A (en) Mowing device
GB383224A (en) Improvements in and relating to shutters
GB467356A (en) A new or improved device for cutting onions
GB424384A (en) Lawn edge cutter
GB510848A (en) Shearing mechanism for cutting continuously-advancing metal
GB410679A (en) Improvements in mechanical razors
US2101739A (en) Lawn mower
GB453626A (en) Rotary fans
GB365224A (en) Improvements in and relating to shutters
GB334982A (en) Improved friction pivot for windows
GB448695A (en) Improvements in or relating to grass-cutting machines and the like
GB467957A (en) Improvements in or relating to leaf hinges
GB370931A (en) An improved variable-throw crank
GB368299A (en) Improvements in apparatus for cutting and trimming edges of grass lawns, fields and borders
GB398280A (en) Improvements in or relating to wave motors
GB206962A (en) An improved grass edge trimmer or cutter
GB414486A (en) Improvements in and relating to hydraulic operating mechanism
GB475594A (en) Improvements in or relating to film gates
GB435427A (en) Improved device for trimming or cutting the edges of lawns and the like
GB579490A (en) Improvements in adjustable louvre shutters and blinds
GB988871A (en) Device for controlling air flow
ES28276U (en) A roller shutter closed to the outside by guides and inclinable blades (Machine-translation by Google Translate, not legally binding)
GB841858A (en) Improvements relating to scissors
GB617633A (en) Improvements in and relating to lawn shears
GB511648A (en) A rotary hand turf cutter and edging knife