GB922712A - Improvements in or relating to slide projectors - Google Patents

Improvements in or relating to slide projectors

Info

Publication number
GB922712A
GB922712A GB36550/62A GB3655062A GB922712A GB 922712 A GB922712 A GB 922712A GB 36550/62 A GB36550/62 A GB 36550/62A GB 3655062 A GB3655062 A GB 3655062A GB 922712 A GB922712 A GB 922712A
Authority
GB
United Kingdom
Prior art keywords
lens
slide
braun
mounting
armature
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
GB36550/62A
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.)
Carl Braun KG
Willy Braun
Original Assignee
Carl Braun KG
Willy Braun
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
Priority claimed from DEB47584A external-priority patent/DE1076965B/en
Priority claimed from DEB49322A external-priority patent/DE1080322B/en
Application filed by Carl Braun KG, Willy Braun filed Critical Carl Braun KG
Publication of GB922712A publication Critical patent/GB922712A/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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/001—Slide projectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lens Barrels (AREA)
  • Diaphragms For Cameras (AREA)
  • Projection Apparatus (AREA)

Abstract

922,712. Optical slide projectors. C. BRAUN, and W. BRAUN, [trading as CARL BRAUN CAMERAWERK]. Jan. 26, 1959 [Jan. 25, 1958; March 22, 1958; June 19, 1958; Aug. 7, 1958; Sept. 27, 1958], No. 36550/62. Divided out of 922,711. Class 97 (1). The projection lens of a slide projector is mounted for lengthwise movement within a lens mounting by actuating means including an actuating member rotatably mounted in said lens mounting and engaging with a follower on the lens and rotated by power means. As shown, an eccentric disc 320 on a shaft 322 carries a lug 330 which engages in a helical groove 331 on the lens 2. To effect focusing when the lens slide without rotating in its mounting in the projector the shaft 322 may be rotated by gearing 340 . . . 343 from a worm 219 driven by a motor 218 or by a ratchet wheel indexed always in the same direction by ratchet teeth on the armature of an electromagnet or a lever operated thereby (Figs. 8, 9, 10 and 12 (not shown)). Instead of moving the lens directly, the lug may reciprocate a sleeve in which the lens is rotatably adjustable (Fig. 11, not shown). The switch for energizing the motor or armature may be arranged in a common housing with that for the relay controlling slide changing as described in Specification 922,711. An integral lens mounting and projection gate construction is also described (Figs. 14 to 16, not shown). Specification 912,366 also is referred to.
GB36550/62A 1958-01-25 1959-01-26 Improvements in or relating to slide projectors Expired GB922712A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DEB47584A DE1076965B (en) 1958-01-25 1958-01-25 Projector, in particular slide projector with adjustable projection lens
DEB0032871 1958-03-22
DEB49322A DE1080322B (en) 1958-06-19 1958-06-19 Projector, especially slide projector
DEB0034337 1958-08-07
DEB0034856 1958-09-27

Publications (1)

Publication Number Publication Date
GB922712A true GB922712A (en) 1963-04-03

Family

ID=27511904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36550/62A Expired GB922712A (en) 1958-01-25 1959-01-26 Improvements in or relating to slide projectors

Country Status (1)

Country Link
GB (1) GB922712A (en)

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