US854586A - Compass-handle-adjusting device. - Google Patents

Compass-handle-adjusting device. Download PDF

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Publication number
US854586A
US854586A US35621507A US1907356215A US854586A US 854586 A US854586 A US 854586A US 35621507 A US35621507 A US 35621507A US 1907356215 A US1907356215 A US 1907356215A US 854586 A US854586 A US 854586A
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Prior art keywords
compass
handle
disks
heads
adjusting device
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Expired - Lifetime
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US35621507A
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Otto G Mayer
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    • 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
    • B43L9/00—Circular curve-drawing or like instruments
    • B43L9/16—Features common to compasses, dividers, and callipers
    • B43L9/20—Pivots

Definitions

  • the adjustment into the middle position of the compass handle is effected by means of two disks arranged between the compass heads, these disks which are located symmetrically eccentrically to the compass heads, being pivotally connected together by a common pin and having an arm engaging in the hollow compass handle and displaceable therein.
  • the object of the present invention is an improved form of construction of this arrangement, whereby the similarly eccentrically mounted disks, without being connected with one another, engage by means of small arms in a recess in the lower part of the compass head and adjust this automatically into the middle position. This is done by the disks having slots lying concentrically to which slots the wire pin connecting the two compass heads passes. In consequence of this arrangement a connection of the two disks and an arm pivoted on the latter is unnecessary, and also it is not necessary to make the handle hollow, but only to have a recess in the lower part of the same.
  • Figs. 1 and 2- are two viewsturned at 90 to one another of the improved adjusting device with the compass closed
  • Fig. 3 is a view with the instrument partly open Fig. 4, asection of the handle and compass head;
  • Fig. 5 an elevation of the partially opened compass with the handle yoke assumed to be removed;
  • Fig. 6, a detail view of one of the two disks lying eccentrically located between the compass heads.
  • the two disks e are revolubly mounted on pins (Z arranged symmetrically eccentrically to the two compass heads I), and have segmental slots 7', lying concentrically to these pins, through which slots the pin 0 connecting the two compass heads passes.
  • Each disk has an arm f engaging in the recess h of the compass handle 9.
  • I declare that what I claim is A compass or the like having pivoted compass-heads and a handle provided with a recess at its lower part, in combination with means for automatic adjustment of said handle into the middle position, and comprising two rotatable disks provided with radially projecting arms which engage in said recess of the handle, and both disks being symmetrically eccentrically pivoted between said compass heads and close to one another, each disk having a slot lying concentrically to the pivot of rotation thereof and the pivot of the compass heads passing through the slots in the disks.

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Description

PATENTED MAY 21, 1907.
0. G. MAYER. COMPASS HANDLE ADJUSTING DEVIGE.
APELIUATION FILED FEB. 7, 1907.
Wm-NEssEs,
INVENTER, OTTO G, M R,
UNITED STATES PATENT OFFICE.
COMPASS-HANDLE-ADJUSTING DEVICE.
Specification of Letters Patent.
Patented May 21, 1907.
J w zlication filed February 7,1907. Serial No. 356,215.
To all whom it may concern:
Be it known that I, OTTO G. MAYER, a citizen of the German Empire, residing at Stutttheir pivots or axes of rotation, through gart, in the Kingdom of \Vurtemberg, Empire of Germany, have invented certain new and useful Improvements in Compass-Handle-Adjusting Devices; and I do hereby declare the following to be a full, clear, and ex act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
In the device in compasses for the automatic adjustment of the handle into the middle position described in patent Serial No. 323,006 of 23rd June 1906, the adjustment into the middle position of the compass handle is effected by means of two disks arranged between the compass heads, these disks which are located symmetrically eccentrically to the compass heads, being pivotally connected together by a common pin and having an arm engaging in the hollow compass handle and displaceable therein.
The object of the present invention is an improved form of construction of this arrangement, whereby the similarly eccentrically mounted disks, without being connected with one another, engage by means of small arms in a recess in the lower part of the compass head and adjust this automatically into the middle position. This is done by the disks having slots lying concentrically to which slots the wire pin connecting the two compass heads passes. In consequence of this arrangement a connection of the two disks and an arm pivoted on the latter is unnecessary, and also it is not necessary to make the handle hollow, but only to have a recess in the lower part of the same.
The object of the invention is shown in connection with a compass in Figures 16 of the accompanying drawings Figs. 1 and 2- are two viewsturned at 90 to one another of the improved adjusting device with the compass closed Fig. 3 is a view with the instrument partly open Fig. 4, asection of the handle and compass head; Fig. 5 an elevation of the partially opened compass with the handle yoke assumed to be removed; and Fig. 6, a detail view of one of the two disks lying eccentrically located between the compass heads.
As already mentioned in the opening paragraph, the two disks e are revolubly mounted on pins (Z arranged symmetrically eccentrically to the two compass heads I), and have segmental slots 7', lying concentrically to these pins, through which slots the pin 0 connecting the two compass heads passes. Each disk has an arm f engaging in the recess h of the compass handle 9. Now as soon as the compass is opened, the two eccentrically mounted disks e are displaced radially against the pivot c in such a way that the two ends of their arms f are always located in the middle line of the compass arm, whereby also the compass handle g is held in each position of adjustment of the two compass arms in the center line of the same.
I declare that what I claim is A compass or the like having pivoted compass-heads and a handle provided with a recess at its lower part, in combination with means for automatic adjustment of said handle into the middle position, and comprising two rotatable disks provided with radially projecting arms which engage in said recess of the handle, and both disks being symmetrically eccentrically pivoted between said compass heads and close to one another, each disk having a slot lying concentrically to the pivot of rotation thereof and the pivot of the compass heads passing through the slots in the disks.
In testimony whereof I afliX my signature, in presence of two witnesses.
OTTO G. MAYER.
Witnesses HERM. HoPPE, ERNST ENTENMANN.
US35621507A 1907-02-07 1907-02-07 Compass-handle-adjusting device. Expired - Lifetime US854586A (en)

Priority Applications (1)

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US35621507A US854586A (en) 1907-02-07 1907-02-07 Compass-handle-adjusting device.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US35621507A US854586A (en) 1907-02-07 1907-02-07 Compass-handle-adjusting device.

Publications (1)

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US854586A true US854586A (en) 1907-05-21

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US35621507A Expired - Lifetime US854586A (en) 1907-02-07 1907-02-07 Compass-handle-adjusting device.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559170A (en) * 1947-12-10 1951-07-03 Pickett Herbert Micrometer caliper with ball pivot and cam
US5090127A (en) * 1991-03-21 1992-02-25 Creative Works, L.P. Safety compass

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559170A (en) * 1947-12-10 1951-07-03 Pickett Herbert Micrometer caliper with ball pivot and cam
US5090127A (en) * 1991-03-21 1992-02-25 Creative Works, L.P. Safety compass

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