US1391187A

US1391187A - Drawing-compasses

Info

Publication number: US1391187A
Application number: US366010A
Authority: US
Inventors: Horwood John
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-03-15
Filing date: 1920-03-15
Publication date: 1921-09-20
Anticipated expiration: 1938-09-20

Description

]. HORWOOD.

DRAWING COMPASSES.

I APPLICATION FILED MAR. 15, 1920.

Patented Sept. 20,1921.

' Fig.2.-

UNITED STATES;

PATENT OFFICE.

JOHN HoRwoonoF HOXTON', LONDON, ENGLAND.

DRAWING-COMPASSES.

To all whom it may concern Be it known that I, JOHN HoRWooD, a subject of the King of Great Britain, residing at 10 Ivy Yard, Ivy street, Hoxton, in

the county of London, in England, have invented a new and useful Improvement. in

compass; Fig. 2, is a front elevation of the compass; Fig. 3, is a side elevation of the compass showing the point; Fig. 4, is the inside elevation of the spring pencil leg, and Fig. 5, is the inside elevation of the spring point. 7

My invention is constructed with a circular block 0 and handle d, the said block 0 having a spring a bent to the required shape and-fixed thereto. The spring a is provided with ends t, and r, bent at right angles. These said ends I? are perforated to receive the pencil tube la, and at 1" to receive the needle point 0; On each side of the spring a I fix a block it, and to the said spring a I rivet an outer spring I) with the end 8 bent at right angles to receive the upper part of the pencil tube, which is movable by means of the spring clip m operated in the slot Z, and to the other or opposite side of the spring a I fix a spring 6 having a bow end n. To this end a and the end of the springv a I place an adjusting screw p,.and nut g,

Specification of Letters Patent.

Patented Sept. 20, 1921.

Application filed Marchv 15, 1920. Serial No. 366,010.

' for the adjustment of the needlepoint 0.

The spring a, and the springs b, and e, are fixed together by rivets 7'. are drilled and tappedto receive the ends of the adjusting screw f operated by the nut g, the said screw 'f being provided with a right and left hand thread, parts of the blocks h are provided. with recesses i slightly cut away, through which the ends of the Screw f project. .A slot at is provided in the needle point end'of the spring a through which the adjusting screw p passes.

applies to either a compasses.

I claim:

Springbow comp-asses comprising a handle, a bow spring fixedly secured at its center to said handle, the legs of the bow: spring being arcuate and-having perforated projections at their ends, one of said legs having secured thereto a member having a perforated projection Spaced from the projection at the vend of the leg, said leg being provided-between said projections with a tapered slot, a spring clip slidable in said slot and adapted to hold a marker receivable in the perforations of said projections, the other leg being similarly slotted, means for adjustably securing a needle point in the perforation of said other leg, and means for adjusting the legs of said bow spring relatively to each other.

pen bow or needle point JOHN HORWOOD.

The blocks h I The same arrangement as above described