GB559124A - Improvements relating to writing tablets - Google Patents

Improvements relating to writing tablets

Info

Publication number
GB559124A
GB559124A GB1196942A GB1196942A GB559124A GB 559124 A GB559124 A GB 559124A GB 1196942 A GB1196942 A GB 1196942A GB 1196942 A GB1196942 A GB 1196942A GB 559124 A GB559124 A GB 559124A
Authority
GB
United Kingdom
Prior art keywords
transparent
backing
sheet
layer
writing
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
GB1196942A
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.)
ARTHUR MARCUS REWALD
LEONHARD WEISSBERG
Original Assignee
ARTHUR MARCUS REWALD
LEONHARD WEISSBERG
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 ARTHUR MARCUS REWALD, LEONHARD WEISSBERG filed Critical ARTHUR MARCUS REWALD
Priority to GB1196942A priority Critical patent/GB559124A/en
Publication of GB559124A publication Critical patent/GB559124A/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
    • B43L1/004—Repeatedly-usable boards or tablets for writing or drawing with illuminating devices
    • B43L1/006—Repeatedly-usable boards or tablets for writing or drawing with illuminating devices with luminescent substances

Landscapes

  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

559,124. Luminescent materials. REWALD, A. M., and WEISSBERG, L. Aug. 25, 1942, No. 11969. [Class 39 (i)] A writing tablet comprises a sheet of transparent or translucent material which is roughened or otherwise prepared on one side to receive writing, a layer containing a phosphorescent material behind this, and a backing of sheet material covering the phosphorescent layer. This layer may include zinc or calcium sulphide and be applied either to the transparent or the backing sheet. Alternatively luminous material may be incorporated in a film of celluloid, cellulose acetate or similar material disposed between the transparent and backing sheets. The latter sheets may be mounted in a frame or joined at their edges. The luminous material may include a radio-active substance.
GB1196942A 1942-08-25 1942-08-25 Improvements relating to writing tablets Expired GB559124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1196942A GB559124A (en) 1942-08-25 1942-08-25 Improvements relating to writing tablets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1196942A GB559124A (en) 1942-08-25 1942-08-25 Improvements relating to writing tablets

Publications (1)

Publication Number Publication Date
GB559124A true GB559124A (en) 1944-02-04

Family

ID=9995987

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1196942A Expired GB559124A (en) 1942-08-25 1942-08-25 Improvements relating to writing tablets

Country Status (1)

Country Link
GB (1) GB559124A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978340A (en) * 1974-08-19 1976-08-31 Schroeder Becky J Luminescent backing sheet for reading and writing in the dark
EP0390270A1 (en) * 1989-03-31 1990-10-03 Horizon Import-Export A board, in particular a writing board

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978340A (en) * 1974-08-19 1976-08-31 Schroeder Becky J Luminescent backing sheet for reading and writing in the dark
EP0390270A1 (en) * 1989-03-31 1990-10-03 Horizon Import-Export A board, in particular a writing board

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