US755396A

US755396A - Compasses.

Info

Publication number: US755396A
Application number: US18025703A
Authority: US
Inventors: Georg Schoenner
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-11-07
Filing date: 1903-11-07
Publication date: 1904-03-22
Anticipated expiration: 1921-03-22

Description

N0 MODEL.

' PATENTED MAR. 22, 1904.

G. SGHOENNER.

GOMPA'SSES.

APPLICATION FILED NOV. 7, 1903.

HHHHH said,) have invented Patented March 22, 1904.

enone sononunnn, or nnnnnnnne. enncompasses.

SPECIFICATION forming part of Letters Patent No. 755,396, dated Marh 22, 11904.

Application filed lllovember 7, 190a. Serial Iil'o.180,257. (No man To all whom, it may concern.-

Be it known that I, Gnono SoHoENNER, manufacturer, a subject of the Emperonof Germany, and a resident of Nuremberg, in the Empire of Germany, (whose post-ofice address is 7 Gartenstrasse, Nuremberg afore- .certain new and useful Improvements in Compasses, of which .the following is a'specification.

The present invention relates to compasses provided with inserted is clamped firmly in a smooth guide or; holder and in this manner adjusted to av suitable length and also secured against lateral movements:

The improvement introduced therein has for its object to allow of the line adjustment of the pin by turning a nut, arranged at the side of the compass-leg and which is therefore easily-handled. This advantage is obtained by the insertion-pin being connected with a spindle guided parallel to the needle at the side of the compass-leg, which spindle carries the pin with it. (in the upper threaded part of this spindle a nut is mounted and prevented from being displaced longitudinally. A pair of compasses provided with this improved fine adjusting arrangement forthe pin is shown in Figures 1 to 5 of the accompanying drawings.

Tn the drawings, Fig. 1 is an elevation of .the lower portion of one leg; Fig. 2, a crosssection taken in proximity to set-screw c. Fig. 3 is a view similar to Fig. l, but with the leg a quarter turned- Fig. i. is a cross-section in proximity to the pin ,g, and Fig. 5 is a View of the entire compasses except that the other'leg is broken away.

The lower end of the leg at is divided into two grooved springparts 6 by means of a lon-.

gitudinal perforation and a longitudinal slot, the said two parts 6 being held together by'a set-screws and gripping between themthe pin The latter has a groove 6 either at its upper end alone or, in case it is provided with two points, as shown in, the accompanying drawings, at both ends. A spindle fis mounted pins in which the pin on the side of the leg 0: parallel to the pin, but

not on the same axis, which spindle carries at its lower end a catch-pin g, directed toward the middle of the compasses. This pin projects through the longitudinal slot of the lower leg of the compasses and engages in the groove or grooves e of the pin, so that-when. longitudinally displaced the spindle f carries the pin along with'it, while after the clamp-shrew c is 4 loosened the pin may be suitably turned. The catch-pin g, sliding in the longitudinal slot of the leg a, also serves for preventing the spindle f rotating. The upper part of the spindleis threaded and passedthrough two guide pieces arranged closely one above the other. The heads of two screws h, which heads are provided with cross-perforations, may be employed as such guide-pieces. Between these screws 5. a stud 2', formed as a nut, is arranged, which is adapted to be rotated on the thread of the spindle f and is milled on its periphery or otherwise treated to enable it to be easily held. Any longitudinal displacement is prevented by the screws h, against which the stud '5 directly bears. On turning the stud a longitudinal displacement of'the spindle f, which is prevented rotating, takes place. The pin (Z, carried along by the pin 9, shares in this movement, so that a suitable and exact fine adjustment of the pin a? in the direction of its height is possible. After theadjustment has taken place the pin may be secured in its then position against any unintentional longitudinal displacement and also against lateral movement by screwing tight the setscrew 0. I

I declare that what I claim is l. in a pair of compasses the combination with one of the legs thereof, of a pin slidingly carried thereby, and independent screw-operated means carried by said leg for slidingsaid pin substantially as described.

2. The combination with'one of the legs of .a pairofcompasses, of a pin slidingly carried thereby, a threaded spindle mounted to slide lengthwise of said leg and having an operative connection with the pin, and a nut on said spindle with means for preventing movementof the same longitudinally of the leg substantially as dBSCIibQd."

3. The combination with one of the legs of a pair of compasses of apin mounted to slide in a guide in said leg, a threaded spindle slidingly supported at the side of the leg, a pin projecting from said spindle and engaging the pin, a nut on said thread and stops on each side of said nut for preventing movement of IO the same longitudinally of the leg substantially as described,

In Witness whereof I have hereunto set my hand in presence of two witnesses,

' GEORG SCHOENNER. Witnesses:

LEONHARD KOERBER, HERMANN ,DoHLEMANN.