GB1123603A - Apparatus for use in the manner of using a blackboard - Google Patents

Apparatus for use in the manner of using a blackboard

Info

Publication number
GB1123603A
GB1123603A GB40214/65A GB4021465A GB1123603A GB 1123603 A GB1123603 A GB 1123603A GB 40214/65 A GB40214/65 A GB 40214/65A GB 4021465 A GB4021465 A GB 4021465A GB 1123603 A GB1123603 A GB 1123603A
Authority
GB
United Kingdom
Prior art keywords
backing
panel
sept
markings
parts
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
GB40214/65A
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.)
Pilkington Group Ltd
Original Assignee
Pilkington Brothers Ltd
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 Pilkington Brothers Ltd filed Critical Pilkington Brothers Ltd
Priority to GB40214/65A priority Critical patent/GB1123603A/en
Priority to US579286A priority patent/US3484956A/en
Publication of GB1123603A publication Critical patent/GB1123603A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/04—Blackboards
    • B43L1/06—Blackboards rigid

Landscapes

  • Drawing Aids And Blackboards (AREA)

Abstract

1,123,603. Blackboards. PILKINGTON BROS. Ltd., and J. W. NIGHTINGALE. 13 Sept., 1966 [21 Sept., 1965], No. 40214/65. Heading B6P. [Also in Division G2] Apparatus for use as a blackboard comprises a panel 1 of transparent material and a backing 5 of opaque material, the writing face 6 of the panel being rendered diffuse reflecting e.g. by stippling, and the reverse face 7 being roughened e.g. by sandblasting, to prevent formation of a secondary image when information is written on the surface 6. The backing 5 may consist of an opaque coating or may be a separate element with e.g. graph-paper markings thereon. If a separate backing 5 is employed, it may be longer than the panel 1 and contain parts with different markings thereon, so that by sliding the backing 5 relatively to the panel, a different background marking can be effected. For this purpose, the backing 5 may be wound on rollers. The panel 1 may be of toughened glass or transparent plastic. The parts 1,5 5 may be held in a frame 2 by removable strips 3 and interposed strips 4 of sponge rubber. The device may be used as a screen for a projector if the backing 5 includes a white pigment.
GB40214/65A 1965-09-21 1965-09-21 Apparatus for use in the manner of using a blackboard Expired GB1123603A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB40214/65A GB1123603A (en) 1965-09-21 1965-09-21 Apparatus for use in the manner of using a blackboard
US579286A US3484956A (en) 1965-09-21 1966-09-14 Apparatus for use in the manner of using a blackboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB40214/65A GB1123603A (en) 1965-09-21 1965-09-21 Apparatus for use in the manner of using a blackboard

Publications (1)

Publication Number Publication Date
GB1123603A true GB1123603A (en) 1968-08-14

Family

ID=10413778

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40214/65A Expired GB1123603A (en) 1965-09-21 1965-09-21 Apparatus for use in the manner of using a blackboard

Country Status (2)

Country Link
US (1) US3484956A (en)
GB (1) GB1123603A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883833U (en) * 1972-01-11 1973-10-12
GB2255532A (en) * 1991-05-07 1992-11-11 Michael Raymond Trevor Jones Visual display aid.

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3549463A (en) * 1968-06-21 1970-12-22 Riegel Paper Corp Universal graphic display material having an embossed polyvinyl fluoride surface layer
US3879859A (en) * 1971-01-04 1975-04-29 Dolores J English Method of visual instruction
US5622504A (en) * 1995-04-20 1997-04-22 Jamie H. Tarziers Reusable bulletin board display
US20050022439A1 (en) * 2003-07-30 2005-02-03 Crump Gregory Allen Apparatus for display/memo board

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US564211A (en) * 1896-07-21 Drawing-slate
US333483A (en) * 1885-12-29 stewart
US1790549A (en) * 1931-01-27 A cory
GB190720668A (en) * 1907-09-17 1908-09-17 Ivan Bzduch A Writing and Drawing Board suitable for Teaching Purposes.
US1381022A (en) * 1920-01-20 1921-06-07 Lichtbild Ges E V Deutsche Optical projection-screen
US1559665A (en) * 1924-03-14 1925-11-03 Beery Educational device
US1596457A (en) * 1925-01-06 1926-08-17 Francis R Scherer Blackboard
FR823795A (en) * 1937-06-30 1938-01-26 Improvements to drawing boards
GB500443A (en) * 1937-10-20 1939-02-09 Percy Rowed Lang Improvements relating to slates, blackboards, and other repeatedly useable writing boards and tablets
US2895234A (en) * 1956-06-20 1959-07-21 Henry F Rohrman Supporting frame construction for display board or chalkboard
US2947093A (en) * 1957-08-21 1960-08-02 Albert M Masters Mounting construction and the combination thereof with a board

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883833U (en) * 1972-01-11 1973-10-12
GB2255532A (en) * 1991-05-07 1992-11-11 Michael Raymond Trevor Jones Visual display aid.

Also Published As

Publication number Publication date
US3484956A (en) 1969-12-23

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