GB1257132A - - Google Patents

Info

Publication number
GB1257132A
GB1257132A GB1257132DA GB1257132A GB 1257132 A GB1257132 A GB 1257132A GB 1257132D A GB1257132D A GB 1257132DA GB 1257132 A GB1257132 A GB 1257132A
Authority
GB
United Kingdom
Prior art keywords
switch
unit
supply
ernstleitz
projectors
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
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 filed Critical
Publication of GB1257132A publication Critical patent/GB1257132A/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
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating

Landscapes

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

Abstract

1,257,132. Supply systems for projectors. ERNSTLEITZ - G.m.b.H. 21 Nov., 1969 [12 Dec., 1968], No. 57132/69. Heading H2H [Also in Divisions G2-G3] A projector has a main switch 3 for connecting lamp 5 across supply 1, and a subsidiary switch 6 with a movable contact 6c operable by a time delay unit 9 to switch off fan motor 8 when a pre-determined time has passed after opening switch 3. Unit 9 may comprise a temperature-sensitive actuator, a pulse generator with mechanical, pneumatic, hydraulic or electrical delay means. Switch 3 may be a double pole switch.
GB1257132D 1968-12-12 1969-11-21 Expired GB1257132A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681814131 DE1814131A1 (en) 1968-12-12 1968-12-12 Projector with follow-up control for the fan motor

Publications (1)

Publication Number Publication Date
GB1257132A true GB1257132A (en) 1971-12-15

Family

ID=5715965

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1257132D Expired GB1257132A (en) 1968-12-12 1969-11-21

Country Status (4)

Country Link
DE (1) DE1814131A1 (en)
FR (1) FR2025946A1 (en)
GB (1) GB1257132A (en)
SE (1) SE350853B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2509955C2 (en) * 1975-03-07 1982-05-13 Fa. Ed. Liesegang, 4000 Düsseldorf Protection circuit for switching off the projection lamp in a projector

Also Published As

Publication number Publication date
FR2025946A1 (en) 1970-09-11
DE1814131A1 (en) 1970-06-25
SE350853B (en) 1972-11-06

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Legal Events

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