GB1161409A - Improvements in or relating to Focussing Means - Google Patents

Improvements in or relating to Focussing Means

Info

Publication number
GB1161409A
GB1161409A GB5017665A GB5017665A GB1161409A GB 1161409 A GB1161409 A GB 1161409A GB 5017665 A GB5017665 A GB 5017665A GB 5017665 A GB5017665 A GB 5017665A GB 1161409 A GB1161409 A GB 1161409A
Authority
GB
United Kingdom
Prior art keywords
lens
pin
lever
arm
discs
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
GB5017665A
Inventor
James Sterling Hallsworth
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.)
GNOME PHOTOGRAPHIC PRODUCTS LT
Original Assignee
GNOME PHOTOGRAPHIC PRODUCTS LT
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 GNOME PHOTOGRAPHIC PRODUCTS LT filed Critical GNOME PHOTOGRAPHIC PRODUCTS LT
Priority to GB5017665A priority Critical patent/GB1161409A/en
Publication of GB1161409A publication Critical patent/GB1161409A/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
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/522—Projection optics

Abstract

1, 161, 409. Lens focusing devices. GNOME PHOTOGRAPHIC PRODUCTS Ltd. Feb. 1, 1967 [Nov.25, 1965], No.50176/65. Heading G2J. The lens of a slide projector or other photographic apparatus is axially shifted for focusing by engagement with the lens barrel 3 of a lug 6 on a lever arm 8 pivoting at 9, the angular movement of the arm being damped by the device 16. This device consists of an element (19, Fig. 3, not shown), rotatable between fixed discs (17) and (18), and having an extension (20) connected to the lever arm through a slot and pin (23). A viscous grease or plastics wafer fills the space between the discs and element (19). Lever 8 may be manually operated through end 10, or through two opposed solenoids 14, 15 having a common armature 12 whose plunger 13 engages the rubber-covered pin 23.
GB5017665A 1965-11-25 1965-11-25 Improvements in or relating to Focussing Means Expired GB1161409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5017665A GB1161409A (en) 1965-11-25 1965-11-25 Improvements in or relating to Focussing Means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5017665A GB1161409A (en) 1965-11-25 1965-11-25 Improvements in or relating to Focussing Means

Publications (1)

Publication Number Publication Date
GB1161409A true GB1161409A (en) 1969-08-13

Family

ID=10454946

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5017665A Expired GB1161409A (en) 1965-11-25 1965-11-25 Improvements in or relating to Focussing Means

Country Status (1)

Country Link
GB (1) GB1161409A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966315A (en) * 1975-01-30 1976-06-29 Hanimex Pty. Ltd. Lens focusing means for slide projectors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966315A (en) * 1975-01-30 1976-06-29 Hanimex Pty. Ltd. Lens focusing means for slide projectors

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees