CA953554A - Apparatus for securing, and controlling, the lowering of a portable picture screen stand - Google Patents

Apparatus for securing, and controlling, the lowering of a portable picture screen stand

Info

Publication number
CA953554A
CA953554A CA131,427A CA131427A CA953554A CA 953554 A CA953554 A CA 953554A CA 131427 A CA131427 A CA 131427A CA 953554 A CA953554 A CA 953554A
Authority
CA
Canada
Prior art keywords
securing
lowering
controlling
picture screen
screen stand
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
CA131,427A
Inventor
Sasuke Takahashi
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
Application granted granted Critical
Publication of CA953554A publication Critical patent/CA953554A/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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Telephone Set Structure (AREA)
CA131,427A 1970-12-30 1971-12-30 Apparatus for securing, and controlling, the lowering of a portable picture screen stand Expired CA953554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45128356A JPS4948132B1 (en) 1970-12-30 1970-12-30

Publications (1)

Publication Number Publication Date
CA953554A true CA953554A (en) 1974-08-27

Family

ID=14982781

Family Applications (1)

Application Number Title Priority Date Filing Date
CA131,427A Expired CA953554A (en) 1970-12-30 1971-12-30 Apparatus for securing, and controlling, the lowering of a portable picture screen stand

Country Status (3)

Country Link
US (1) US3780974A (en)
JP (1) JPS4948132B1 (en)
CA (1) CA953554A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU573859B2 (en) * 1984-07-04 1988-06-23 Aprica Kassai Kabushiki Kaisha Foot rest assembly for baby carriage
US5072910A (en) * 1990-06-11 1991-12-17 May Randall L Adjustable tripod stand
DE19614922A1 (en) * 1996-04-16 1997-10-23 Opel Adam Ag Clamp connection, for connecting sections of vehicle's gear shift linkage
US6032914A (en) * 1997-07-11 2000-03-07 Southland Supply Company, Inc. Adjustable leg
US6347777B1 (en) * 2000-02-01 2002-02-19 Hoist Fitness Systems Seat adjustment apparatus
US6551226B1 (en) 2000-09-28 2003-04-22 Hoist Fitness Systems Adjustment apparatus for exercise machine
US6575656B2 (en) * 2001-05-24 2003-06-10 Caravan Canopy International, Inc. Pull pin assembly for canopy
WO2011119636A2 (en) * 2010-03-24 2011-09-29 Toollab, Inc. Adjustable pole
US10988985B2 (en) * 2018-06-25 2021-04-27 Thomas Yoo Ladder
US11441589B1 (en) 2021-06-30 2022-09-13 Brent Ravnaas Locking device for a telescoping leg

Also Published As

Publication number Publication date
US3780974A (en) 1973-12-25
JPS4948132B1 (en) 1974-12-19
DE2165613B2 (en) 1976-09-23
DE2165613A1 (en) 1972-07-13

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