US497802A - Combined trammel and calipers - Google Patents

Combined trammel and calipers Download PDF

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US497802A
US497802A US497802DA US497802A US 497802 A US497802 A US 497802A US 497802D A US497802D A US 497802DA US 497802 A US497802 A US 497802A
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trammel
calipers
combined
bars
frame
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00Circular curve-drawing or like instruments
    • B43L9/02Compasses
    • B43L9/04Beam compasses

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  • My invention has relation to improvements in that class of calipers used by artisans, wherein it is desired to combine in a single tool the benefits of many without the corresponding increase in the number of parts. And the objects of my invention are to produce calipers which shall be strong, serviceable and accurate, yet capable of sensitive adjustment and which by aslight interchange of parts may be utilized as an entirely different class of calipers and further to combine with these a trarnmel suitable for mechanics or artisans use.
  • Figure 1 represents a side elevation of my improved calipers.
  • Fig. 2 is a central longitudinal section of the main frame.
  • Fig. 3 is a plan view.
  • A, B, O, D is a hollow frame preferably of metal and generally made with open sides, leaving cross-bars, O, N, and P, and end pieces Q, R, all made integral.
  • a nut Z In suitable bearings in the cross-bar, N, and revolubly mounted is a nut Z,through the center of which and concentric therewith is a shaft, Y, and the ends whereof are screwthreaded.
  • Sliding in the frame, A, B, C, D are bars, E, F, the inner ends of which are tapped to engage the ends of the screwthreaded shaft, Y, and to be drawn in or forced out by the turning of the shaft, Y, by means of the nut, Z.
  • the outer ends of the bars, E, F, are perforated to receive the trammel points or caliper legs.
  • the arms, F are held firmly wheresoever desired in the frame, A, B, O, D, by set screws, 11, e, and the trammel arms by set screws, h, i, placed on the ends of bars, E, E.
  • this invention can be used as inside, outside and hermaphrodite calipers as well as a trammel.

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Description

(No Model.)
B. LINDNER.
COMBINED TRAMMEL AND GALIPERS.
No. 497,802. Patented May 23, 1893.
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UNITED STATES PATENT OFFICE.
EMERANN LINDNER, OF AKRON, OHIO.
COMBINED TRAMMEL AND CALIP ERS.
SPECIFICATION forming part of Letters Patent No. 497,802, dated May 23, 1893.
Application filed December 5. 1892. Serial No. 454,190- (No model.)
To all whom it may concern:
Be it known that I, EMERANN LINDNER, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a new and useful Combination Trammel and Calipers, of which the following is a specification.
My invention has relation to improvements in that class of calipers used by artisans, wherein it is desired to combine in a single tool the benefits of many without the corresponding increase in the number of parts. And the objects of my invention are to produce calipers which shall be strong, serviceable and accurate, yet capable of sensitive adjustment and which by aslight interchange of parts may be utilized as an entirely different class of calipers and further to combine with these a trarnmel suitable for mechanics or artisans use.
To the aforesaid objects my invention consists in the peculiar and novel construction, combination and arrangement of parts hereinafter described, and then specifically claimed, reference being had to the accompanying drawings, forming a part of this specification.
In the accompanying drawings in which similar reference letters indicate like parts in the different figures, Figure 1, represents a side elevation of my improved calipers. Fig. 2,is a central longitudinal section of the main frame. Fig. 3, is a plan view.
In the drawings A, B, O, D, is a hollow frame preferably of metal and generally made with open sides, leaving cross-bars, O, N, and P, and end pieces Q, R, all made integral. In suitable bearings in the cross-bar, N, and revolubly mounted is a nut Z,through the center of which and concentric therewith is a shaft, Y, and the ends whereof are screwthreaded. Sliding in the frame, A, B, C, D, are bars, E, F, the inner ends of which are tapped to engage the ends of the screwthreaded shaft, Y, and to be drawn in or forced out by the turning of the shaft, Y, by means of the nut, Z. The outer ends of the bars, E, F,are perforated to receive the trammel points or caliper legs. The arms, F, are held firmly wheresoever desired in the frame, A, B, O, D, by set screws, 11, e, and the trammel arms by set screws, h, i, placed on the ends of bars, E, E. By slight change of the caliper legs and trammel points this invention can be used as inside, outside and hermaphrodite calipers as well as a trammel.
What I desire to secure by Letters Patent 1. In a combined trammel and calipers the combination of a central frame, having a revolubly mounted nut and screw-threaded shaft arranged to simultaneously actuate sliding bars in said frame; the ends of said bars perforated to receive trammel points or caliper legs, said legs having one pointed and one curved end all combined substantially as shown and described.
2. In a combined trammel and calipers, the I
US497802D Combined trammel and calipers Expired - Lifetime US497802A (en)

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