US984697A - Compasses. - Google Patents

Compasses. Download PDF

Info

Publication number
US984697A
US984697A US52521809A US1909525218A US984697A US 984697 A US984697 A US 984697A US 52521809 A US52521809 A US 52521809A US 1909525218 A US1909525218 A US 1909525218A US 984697 A US984697 A US 984697A
Authority
US
United States
Prior art keywords
leg
plates
compasses
screw
members
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
Application number
US52521809A
Inventor
Fritz Pfaff
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
Priority to US52521809A priority Critical patent/US984697A/en
Application granted granted Critical
Publication of US984697A publication Critical patent/US984697A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
    • B23Q1/54—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only
    • B23Q1/545—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only comprising spherical surfaces
    • B23Q1/5462—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only comprising spherical surfaces with one supplementary sliding pair

Definitions

  • the subject of the present invention con* cerns improvements in and relating to compasses.
  • the essential features of this invention consist of a. compass having tlnee legs whereby two circles having a different radius can be drawn simultaneously.
  • the two outer legs are of the same length, but the middle leg is adjustable in length; furthermore either of the outer legs can turn on its own pivot independently of the other.
  • FIG. 1 is a front elevation showing the compass closed up.
  • Fig. 2 is a side elevation of same.
  • Fig. 3 is a sectional side elevation on line A-B of Fig. 1.
  • Fig. 4 is a section on line C4D of Fig. 1.
  • the compass consists of two suitably shaped plates 1 adapted to carry two pairs of side members 2; said plates 1 also carry the cent-ral leg 3, while the two pairs of members 2 are also suitably formed and constitute the side legs.
  • the members 2 are rounded off at the top and each pair is secured by a screw 4 on which it is revolubly mounted.
  • the screws 4 carry integral heads 5 provided with a projecting point 6 which fits in a suitable recess in one of the members thereby preventing the screw from turning when the nut 7 is being tightened up.
  • the legs can be adjusted to any desired position by first loosening the nut 7, pulling out the leg to the required extent, then tightening up the nut.
  • Two disks 8 are inserted between the plates 1 to keep them apart, the screws 4 passing through said disks 8. (Figs. 3 and 4).
  • the leg 3 is provided with a longitudinal slot 9 in which is carried a screw 10 provided with a nut 11.
  • the upper part of the leg 3 is adapted to slide between the flatportions 12 of the disks 8. If the leg 3 is drawn up in the position shown in Fig. 1, the two outer legs can be used in the ordinary way as with the known type of Compasses. By unscrewing or loosening the nut 11, the leg 3 slides down between the lower continuations of the plates 1 until its point is in the same plane as the points of the other legs.
  • the screw 10 passes through the plates 1 and the leg 3 situated between said plates, so that by screwing up the nut 11, the leg 3 is secured immovably.
  • the other two legs can be made to simultaneously describe two circles, each circle having a diderent radius.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Description

F. PFAFF. UOMPASSES. APPLIoATIoN FILED 001229, 1909.
Patented Feb. 21, 1911.V
TH: NoRRls PETERS cu.,'wAsHlNsTcN, D, c4
UNITED STATES ATENT FFICE.
FRITZ PFAFF, OF ACACIAS, GENEVAQSWITZERLAND.
COMPASSES.
Specification of Letters Patent. Patented Feb. 21, 1911. Application filed October 28, 1909.
Serial No. 525,218.
To all whom 'it may concern.
Be it known that I, FRITZ PFAFF, a citizen of Switzerland, and resident of Acacias, Geneva, Switzerland, have invented Improvements in and Relating to Compasses, of which the following is a specification.
The subject of the present invention con* cerns improvements in and relating to compasses.
The essential features of this invention consist of a. compass having tlnee legs whereby two circles having a different radius can be drawn simultaneously. The two outer legs are of the same length, but the middle leg is adjustable in length; furthermore either of the outer legs can turn on its own pivot independently of the other.
In order that this invention may be fully understood, reference is made to the accompanying drawing, in which Figure 1 is a front elevation showing the compass closed up. Fig. 2 is a side elevation of same. Fig. 3 is a sectional side elevation on line A-B of Fig. 1. Fig. 4 is a section on line C4D of Fig. 1.
The compass consists of two suitably shaped plates 1 adapted to carry two pairs of side members 2; said plates 1 also carry the cent-ral leg 3, while the two pairs of members 2 are also suitably formed and constitute the side legs. The members 2 are rounded off at the top and each pair is secured by a screw 4 on which it is revolubly mounted. The screws 4 carry integral heads 5 provided with a projecting point 6 which fits in a suitable recess in one of the members thereby preventing the screw from turning when the nut 7 is being tightened up. Thus the legs can be adjusted to any desired position by first loosening the nut 7, pulling out the leg to the required extent, then tightening up the nut. Two disks 8 are inserted between the plates 1 to keep them apart, the screws 4 passing through said disks 8. (Figs. 3 and 4).
The leg 3 is provided with a longitudinal slot 9 in which is carried a screw 10 provided with a nut 11. The upper part of the leg 3 is adapted to slide between the flatportions 12 of the disks 8. If the leg 3 is drawn up in the position shown in Fig. 1, the two outer legs can be used in the ordinary way as with the known type of Compasses. By unscrewing or loosening the nut 11, the leg 3 slides down between the lower continuations of the plates 1 until its point is in the same plane as the points of the other legs. The screw 10 passes through the plates 1 and the leg 3 situated between said plates, so that by screwing up the nut 11, the leg 3 is secured immovably. Thus by using one of the outer legs as an axis, the other two legs can be made to simultaneously describe two circles, each circle having a diderent radius.
An important feature lies therein, that if the radius of a given circle has been established, say for insta-nce by means of the right hand outer leg and the middle leg, the same radius can be employed any time thereafter if meantime the left-hand outer leg and t-he middle leg are used as ordinary Compasses, that is to say the left hand leg can now be moved in and out to describe circles of different radii, while when it is desired to draw a circle of the iirst established radius, the left hand leg is moved around up out of the way, the middle leg is lowered again, and the compass is already for drawing the required circle.
Having fully described my invention, what I claim and desire to secure by Letters Patent is z- Improvements in and relating to compasses, comprising in combination, two plates, two pairs of members having recesses secured to said plates, a leg formed by each pair of the said members, a middle leg having a slot and being secured between said plates, a screw passing through said plates and the slot in said middle leg, a nut adapted to screw on to said screw, disks placed between said plates, a screw passing through each pair of said members, said plates and a. disk, nuts adapted to screw on to the ends of said screws, the latter having pointed projections integral therewith, each of said projections engaging in a suitable recess in one of each pair of members, whereby said screws are prevented from turning when the nuts are being tightened up, substantially as described and shown and for the purpose set forth.
In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.
FRITZ PFAFF.
Witnesses:
L. H. MUNIER, G. VULLIE. Y
US52521809A 1909-10-28 1909-10-28 Compasses. Expired - Lifetime US984697A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US52521809A US984697A (en) 1909-10-28 1909-10-28 Compasses.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US52521809A US984697A (en) 1909-10-28 1909-10-28 Compasses.

Publications (1)

Publication Number Publication Date
US984697A true US984697A (en) 1911-02-21

Family

ID=3053045

Family Applications (1)

Application Number Title Priority Date Filing Date
US52521809A Expired - Lifetime US984697A (en) 1909-10-28 1909-10-28 Compasses.

Country Status (1)

Country Link
US (1) US984697A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5398577A (en) * 1993-11-10 1995-03-21 Pierce; Danny K. Method and apparatus for tree felling
US9377281B2 (en) 2013-12-23 2016-06-28 James Dankowski Precision tool for locating center lines in geometric shapes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5398577A (en) * 1993-11-10 1995-03-21 Pierce; Danny K. Method and apparatus for tree felling
US9377281B2 (en) 2013-12-23 2016-06-28 James Dankowski Precision tool for locating center lines in geometric shapes

Similar Documents

Publication Publication Date Title
US984697A (en) Compasses.
CN208501911U (en) A kind of telescopic auxiliary beam joint device
US2002741A (en) Screw fastening means
FR2255040A1 (en) Stirrup-type osteo-surgery drill guide - has two central members pivoting on axis through dry point tip
US1661889A (en) Swivel wheel
US1197286A (en) Tapping and reaming device.
US903495A (en) Coping-saw frame.
DE828825C (en) Screw clamp
US978900A (en) Work-bench screw.
US641457A (en) Bench-vise.
US966426A (en) Clamp.
US487726A (en) Dental regulator
DE325094C (en) Circle
US869851A (en) Bevel.
US228429A (en) Device for cutting screw-threads
US313275A (en) Dividers and calipers
US591893A (en) smith
US1265320A (en) Cork-extractor.
US1055377A (en) Cork-extractor.
US893223A (en) Bevel.
DE70680C (en) Compasses for drawing circles and ellipses
US271128A (en) Center-square and bevel
DE374278C (en) Lighting fixture with axially adjustable lighting body
DE339004C (en) Self-centering chuck
US1061846A (en) Compasses.