US130038A - Improvement in the construction of spring-compasses - Google Patents
Improvement in the construction of spring-compasses Download PDFInfo
- Publication number
- US130038A US130038A US130038DA US130038A US 130038 A US130038 A US 130038A US 130038D A US130038D A US 130038DA US 130038 A US130038 A US 130038A
- Authority
- US
- United States
- Prior art keywords
- compasses
- spring
- construction
- improvement
- blank
- 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
- 238000010276 construction Methods 0.000 title description 6
- 210000003414 Extremities Anatomy 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 2
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/16—Compasses, i.e. with a pair of pivoted arms
Definitions
- the object of this invention is to improve the construction of spring-compasses so as to render them cheaper, lighter, and handsomer in shape and finish than heretofore; and to this end the invention consists in an improved article of manufacture-viz., spring-compasses struck up from fine -sheet metalas I willnow proceed to describe.
- parta,1 tapers to a point, and is provided with a single aperture, m, arranged in line with the longer axis of the blank.
- the part a? likewise tapers to a point, and is provided with two small apertures, u fn, arranged at equal distances on each side of said axis, in a line crossing it at right angles, the said line and the aperture m being equidistant from the cen ter of the blank.
- the notches o o may be cut out, though this is not essential.
- One stroke of a suitable die will suffice to form the blank, as represented in Fig. l.
Description
T. HA'GERTY,
`Improverr'lent inthe Construc-tiqn of Spring-Compasses.-
UNITED STATES PATENT OFFICE.
THOMAS HAGER-TY, or RICHMOND, viEeINiA.
IMPROVEMENT IN TH CCNSTRUCTION OF SPRINGCMPASSES.`
Specification forming part of Letters Patent No. 130,038, dated July 30, 1872.
To all whom it may concern:
` Be it known that I, THOMAS HAGERTY, of Richmond, Henrico county, State of Virginia, have invented a new and useful Improvement in vSpring-Compasses 5 and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing forming part of this specification, in which- Figure 1is a plan of the blank; and Fig. 2, a perspective view of the finished instrument. Similar letters of reference in the accompanying drawing denote the same parts.
The object of this invention is to improve the construction of spring-compasses so as to render them cheaper, lighter, and handsomer in shape and finish than heretofore; and to this end the invention consists in an improved article of manufacture-viz., spring-compasses struck up from fine -sheet metalas I willnow proceed to describe.
From a sheet or plate of` suitable metal, I cut out the blank A, shown in Fig. 1, such blank having a central portion, a, which afterwards becomes the spring, and the ends a1 a2,
which afterwards become the legs of the linished instrument. The centralpart ais formed,
preferably, with straight parallel edges. The
parta,1 tapers to a point, and is provided witha single aperture, m, arranged in line with the longer axis of the blank. The part a? likewise tapers to a point, and is provided with two small apertures, u fn, arranged at equal distances on each side of said axis, in a line crossing it at right angles, the said line and the aperture m being equidistant from the cen ter of the blank. The notches o o may be cut out, though this is not essential. One stroke of a suitable die will suffice to form the blank, as represented in Fig. l.
Having thus prepared the blank, I next, by
means of a pair of dies or a bending instru ment, turn the edges of the vmetal over from the points o o to the extremities, as shown in Fig. 2. The screw s will then be inserted through the hole m, and held by a rivet passing through `the holes n n. The instrument,
having been tempered either in the plate or cutting out the blank A, with its holes and its pointed extremities, as shown in Fig. Y
l, bending it to the shape represented in Fig. 2, and applying the screw s, substantially as and for thepurposes specified.
THOMAS Witnesses: N. K. ELLsWoRTn,
M. CHURCH.
The same construction may HAGEETY.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US130038A true US130038A (en) | 1872-07-30 |
Family
ID=2199456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US130038D Expired - Lifetime US130038A (en) | Improvement in the construction of spring-compasses |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US130038A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2764816A (en) * | 1952-12-10 | 1956-10-02 | Cesaris Fred De | Compass |
-
0
- US US130038D patent/US130038A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2764816A (en) * | 1952-12-10 | 1956-10-02 | Cesaris Fred De | Compass |
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