GB242524A - Appliance of instruction for the explanation of fraction sums - Google Patents

Appliance of instruction for the explanation of fraction sums

Info

Publication number
GB242524A
GB242524A GB973925A GB973925A GB242524A GB 242524 A GB242524 A GB 242524A GB 973925 A GB973925 A GB 973925A GB 973925 A GB973925 A GB 973925A GB 242524 A GB242524 A GB 242524A
Authority
GB
United Kingdom
Prior art keywords
sectors
support
fractions
indicator
cavity
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
GB973925A
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 GB973925A priority Critical patent/GB242524A/en
Publication of GB242524A publication Critical patent/GB242524A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B19/00—Teaching not covered by other main groups of this subclass
    • G09B19/02—Counting; Calculating

Landscapes

  • Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Toys (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

242,524. Heuser, K. April 14, 1925. Teaching arithmetic; number-building apparatus.-In apparatus for demonstrating the meaning of fractions, of the kind in which sectors representing various fractions of a circle are assembled in a circular cavity to form a part or the whole of a circle, the cavity is formed in a support b and is surrounded by an indicator c having marks d, d<1>, d<2>, Fig. 1, or clips h, Fig. 3, for showing the sum of the fractions formed by various combinations of sectors a. Sectors representing different fractions, and the corresponding marks or clips on the indicator may be differentiated by colour. The sectors are secured in the cavity by engagement with a knob e, Fig. 1, on the support b, and an undercut g in the indicator, or the sectors may have rubber pads i, Fig. 3, for engaging holes in the support. The support may consist of a wood frame in which is fixed a sheet of cardboard having a circular aperture.
GB973925A 1925-04-14 1925-04-14 Appliance of instruction for the explanation of fraction sums Expired GB242524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB973925A GB242524A (en) 1925-04-14 1925-04-14 Appliance of instruction for the explanation of fraction sums

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB973925A GB242524A (en) 1925-04-14 1925-04-14 Appliance of instruction for the explanation of fraction sums

Publications (1)

Publication Number Publication Date
GB242524A true GB242524A (en) 1925-11-12

Family

ID=9877827

Family Applications (1)

Application Number Title Priority Date Filing Date
GB973925A Expired GB242524A (en) 1925-04-14 1925-04-14 Appliance of instruction for the explanation of fraction sums

Country Status (1)

Country Link
GB (1) GB242524A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705843A (en) * 1953-10-30 1955-04-12 Lloyd G Hawkins Device for teaching fractional and decimal arithmetic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705843A (en) * 1953-10-30 1955-04-12 Lloyd G Hawkins Device for teaching fractional and decimal arithmetic

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