US199917A - Improvement in rules for making straight and circular lines - Google Patents
Improvement in rules for making straight and circular lines Download PDFInfo
- Publication number
- US199917A US199917A US199917DA US199917A US 199917 A US199917 A US 199917A US 199917D A US199917D A US 199917DA US 199917 A US199917 A US 199917A
- Authority
- US
- United States
- Prior art keywords
- rules
- improvement
- circular lines
- making straight
- rule
- 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 - Lifetime
Links
- 239000000203 mixture Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
Images
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
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/20—Curve rulers or templets
- B43L13/22—Adjustable curve rulers
Definitions
- the object of my invention is to combine with a straight rule an elastic steel strap, pivoted at each end, for the purpose of forming the arc of a circle to be used in drafting in all mechanical work.
- loops at a may both be made adjustable, if found more convenient, and may be detached, and the rule used with out them.
- the elastic strap being widest in the middle, and tapering to each end upon a circle laterally, will form a true circle vertically when the ends are made to approach each other until a semicircle is produced.
- elastic strap or bow B In combination with the rule A, elastic strap or bow B, plate and loop a, clasp and loop a, provided with the key or wedge c, substantially as hereinbefore described, and for the purposes set forth.
- the elastic strap or bow B provided with spurs b b, metallic plate and loop a, clasp and loop a, provided with key or wedge c, in combination, substantially as herein shown and described.
Landscapes
- Adornments (AREA)
Description
W. V. MARSHALL. v Rules for Making Straight and Circular Lines.
No.'199,917. Patented'Feb. 5,1878.
fittest, I I 71/118 72/207".
UNITED STATES PATENT OFFICE.
WILLIAM V. MARSHALL, OF JANESVILLE, WISCONSIN.
IMPROVEMENT lN RULES FOR MAKING STRAIGHT 'ANDCIRCULAR LINES.
Specification forming part of Letters Patent No. 199,917, dated February 5, 1878; application filed July 1, 1876.
To all whom it may concern Be it known'that I, WILLIAM V. MARSHALL, of J anesville, in the county of Rock and State of Wisconsin,have invented a new and useful Improvement in Rules for Making Straight .and Circular Lines, which improvement is fully set forth in the following specification, reference being had to the accompanying drawing.
The object of my invention is to combine with a straight rule an elastic steel strap, pivoted at each end, for the purpose of forming the arc of a circle to be used in drafting in all mechanical work.
This I accomplish by the use of an ordinary straight rule, A, marked oil in inches and fractions of inches, on each end of which is a metallic plate-carrying loop, a, at the other a claspcarrying loop, a, similar in construction except that it is adjustable and make to slide upon the rule toward the center and back, and to be set at any desired point by means of key or wedge c, an elastic metallic strap, B, of uniform thickness, being out upon a circle on one edge and straight upon the other, being the widest in the middle and tapering to each end, on which are spurs b b, projecting laterally from the circular edge, and entering the loops a a, located at each end of the rule, forming ahinge, said strap being the same length as the rule when lying parallel with it; and when the movable loop is slid toward the center of the rule the elastic metallic strap B is sprung outwardly, and made to form the arc of acircle of such a diameter as may be desired.
It will be observed that the loops at a may both be made adjustable, if found more convenient, and may be detached, and the rule used with out them. The elastic strap being widest in the middle, and tapering to each end upon a circle laterally, will form a true circle vertically when the ends are made to approach each other until a semicircle is produced.
I claim as my invention- 1. In combination with the rule A, elastic strap or bow B, plate and loop a, clasp and loop a, provided with the key or wedge c, substantially as hereinbefore described, and for the purposes set forth.
2. The elastic strap or bow B, provided with spurs b b, metallic plate and loop a, clasp and loop a, provided with key or wedge c, in combination, substantially as herein shown and described.
WILLIAM V. MARSHALL.
Publications (1)
Publication Number | Publication Date |
---|---|
US199917A true US199917A (en) | 1878-02-05 |
Family
ID=2269324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US199917D Expired - Lifetime US199917A (en) | Improvement in rules for making straight and circular lines |
Country Status (1)
Country | Link |
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US (1) | US199917A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2470697A (en) * | 1944-06-30 | 1949-05-17 | Gustave A Haederer | Instrument for drawing circular and curvilinear lines |
US4051600A (en) * | 1976-09-22 | 1977-10-04 | Ray Haapala | Garland marker for fancy cakes |
WO2020098733A1 (en) * | 2018-11-18 | 2020-05-22 | 武汉满洪流科技有限公司 | Curve tracing flexible ruler and curve drawing device |
-
0
- US US199917D patent/US199917A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2470697A (en) * | 1944-06-30 | 1949-05-17 | Gustave A Haederer | Instrument for drawing circular and curvilinear lines |
US4051600A (en) * | 1976-09-22 | 1977-10-04 | Ray Haapala | Garland marker for fancy cakes |
WO2020098733A1 (en) * | 2018-11-18 | 2020-05-22 | 武汉满洪流科技有限公司 | Curve tracing flexible ruler and curve drawing device |
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