GB234558A - Improvements in photographic projection devices - Google Patents

Improvements in photographic projection devices

Info

Publication number
GB234558A
GB234558A GB526024A GB526024A GB234558A GB 234558 A GB234558 A GB 234558A GB 526024 A GB526024 A GB 526024A GB 526024 A GB526024 A GB 526024A GB 234558 A GB234558 A GB 234558A
Authority
GB
United Kingdom
Prior art keywords
projection devices
switch
photographic projection
lighting circuit
circuit
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
GB526024A
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 GB526024A priority Critical patent/GB234558A/en
Publication of GB234558A publication Critical patent/GB234558A/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
    • G03B27/54—Lamp housings; Illuminating means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)

Abstract

234,558. Montigny, A. Sept. 28, 1923, [Convention date]. Addition to 222,431. Enlarging, copying, and reducing.-In the projection apparatus described in the parent Specification, the lighting circuit for the opaque body, comprising a luminous source 10 and rheostat 11, may be independently controlled by a switch 5<a>, or it can be connected by means of a contact plug 7 in parallel with the lighting circuit 1 of the transparent body and controlled by the switch 5 of that circuit.
GB526024A 1924-02-29 1924-02-29 Improvements in photographic projection devices Expired GB234558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB526024A GB234558A (en) 1924-02-29 1924-02-29 Improvements in photographic projection devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB526024A GB234558A (en) 1924-02-29 1924-02-29 Improvements in photographic projection devices

Publications (1)

Publication Number Publication Date
GB234558A true GB234558A (en) 1925-05-29

Family

ID=9792735

Family Applications (1)

Application Number Title Priority Date Filing Date
GB526024A Expired GB234558A (en) 1924-02-29 1924-02-29 Improvements in photographic projection devices

Country Status (1)

Country Link
GB (1) GB234558A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7857635B2 (en) 2007-09-12 2010-12-28 Commscope, Inc. Of North Carolina Board edge termination back-end connection assemblies and communications connectors including such assemblies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7857635B2 (en) 2007-09-12 2010-12-28 Commscope, Inc. Of North Carolina Board edge termination back-end connection assemblies and communications connectors including such assemblies

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