GB191505158A - Improvements in Calculating Apparatus. - Google Patents

Improvements in Calculating Apparatus.

Info

Publication number
GB191505158A
GB191505158A GB191505158DA GB191505158A GB 191505158 A GB191505158 A GB 191505158A GB 191505158D A GB191505158D A GB 191505158DA GB 191505158 A GB191505158 A GB 191505158A
Authority
GB
United Kingdom
Prior art keywords
proportional
extensible member
lazy
tongs
graduated
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
Inventor
John Cecil Mather
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
Publication of GB191505158A publication Critical patent/GB191505158A/en
Expired legal-status Critical Current

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  • Prostheses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

5158. Mather, J. C. April 6. Proportional calculators; logarithmic calculators. - In a proportional calculator, a graduated extensible member is adapted to be superposed on an ordinary scale of fixed length. One form of the extensible member comprises a lazy-tongs, Fig. 3, graduated as shown. In modifications, springs are used, either spiral as shown in Fig. 4, or flat, jointed alternately at the ends and middle. If the outline of the lazy-tongs or spring is made of varying width as shown in Fig. 6, so that the distances between the joints e are unequal, the calculator may represent a mathematical function other than that of direct proportion; for example the distances of the joints may be proportional to logarithms. Spring clips may be placed on the extensible member in any position to form handles to expand the member and to mark any desired points.
GB191505158D 1915-04-06 1915-04-06 Improvements in Calculating Apparatus. Expired GB191505158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191505158T 1915-04-06

Publications (1)

Publication Number Publication Date
GB191505158A true GB191505158A (en) 1916-05-08

Family

ID=32674234

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191505158D Expired GB191505158A (en) 1915-04-06 1915-04-06 Improvements in Calculating Apparatus.

Country Status (1)

Country Link
GB (1) GB191505158A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353274A (en) * 1964-05-15 1967-11-21 Dulhunty Philip Wellesley Aerial navigation device
US3645000A (en) * 1969-06-04 1972-02-29 Sadie Gass Drapery-measuring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353274A (en) * 1964-05-15 1967-11-21 Dulhunty Philip Wellesley Aerial navigation device
US3645000A (en) * 1969-06-04 1972-02-29 Sadie Gass Drapery-measuring device

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