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
Links
Landscapes
- 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.
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)
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 |
-
1915
- 1915-04-06 GB GB191505158D patent/GB191505158A/en not_active Expired
Cited By (2)
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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