US672382A - Gage. - Google Patents

Description

No. 672,382. Patented Apr. I6, |901.

A. J. LUCY.

GAGE. (Appumion me@ oct.. is, 1900.) (No Model.)

F G Z I 1L V`\ F 0 5 www artnr written,

ARTHUR JOHN LUCY, OF OROYDON, ENGLAND, ASSLGNOR OF ONE-HALF TO LOUIS HENRY TURTLE, OF SAME PLACE.

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SPECIFICATION forming part of Letters Patent No. 672.382, dated April 1G, 190i.

Application filed October Z3, 1900. Serial No. 34,040. (No model.)

To tf/L whom, it 11m/y concern:

Be it known that I, ARTHUR JOHN LUCY, mechanical engineer, a subject of the Queen of Great Britain, residing at Meadowcraft,

Penn road, Croydon, in the county of Surrey, England, have invented an improved gage or protractor for use in gaging, marking off, and testing engineers work and setting or adjusting tools and the like operations, of which the ro following is a specification.

This invention consists of an instrument for workshop use adapted to fulfil various op-v gular relation to the base or other datum edge or edges of the stock, the sector and stock being provided with scales whereon this angular relation may be read off.

Reference is to be had to the accompanying drawings, wherein- Figure l is a face view of the instrument, and Figs. 2 and 3 are opposite end views thereof. The other figures show the principal parts separately, Fig. 4 being a face view of the stock and Figs. 5 and 6 sections thereof on lines A B and C D, respectively, while Fig. 7 is a face View of the sector, and Fig. 8 a section ofthe same Von line E F, Fig. 7.

The same letters of reference indicate the same parts in all the figures.

The stock ct, which may either be a casting or be formed of three stampings of sheet metal riveted together, is formed with a circular seat b, extending, preferably, through three-fourths of a circle, in which the sector c is accurately itted, so as to he circularly adjustable therein. The base d of the stock is straight, and the two sides e are preferably at right angles thereto, While the fourth side of the stock opposite to the b ase is formed 5o by members Whose faces fg make with each other a renering angle, (preferably a right angle,) Whose vertex is coincident with the center of motion of the sector c, from Which center the faces f g therefore radiate. The faces f g are of equal length, make equal angles with the base el, and preferably terminate in short flat faces an, parallel to the base d.

The sector c is preferably of more than semicircular form, and it is circularly adjustable in the corresponding seatb in the stock which 6o seat opens through the one angular member g of the stock, so as to permit of the sector emerging therefrom when circularly adjusted, as hereinafter described. The sector is preferably fitted in the stock, so as to be flush with one face thereof, as shown, and the rule 77, is slidably held in a seat or groove i in the under side of the sector, so that the front or working edge of the rule h passes diametrically through the center of motion of the sec- 7o tor, the rule being held to its seat by a setnutj, working on a screw-stud k,- xed in the sector in the plane of and at right angles to the length of the rule, the end of which stud is cross-notched, as at Z, to engage with the other or back edge of the rule h, the nut pressing against the back edge of the rule, preferably through the medium of a springwasher. The sector is preferably formed of an open frame comprising a circumferential 8o member and radial arms, and the circumferential `member is cross-cut, as at m, between the points of abutment and of application of the screw-pressure, so that the screw k and nutj when tightened so as to clamp the rule also have for effect to tend to slightly expand the sector in such manner as to make it bind tightly in its seat b in the stock ct, the same nut and screw thus serving to fix the rule h in its seat and to lock the rule h and sector c 9o in Whatever angular position in the stock they may be adjusted.

The sector c, besides Working in a circumferential seat b, is preferably also fitted toward its center to Work around a concentric circular boss n in one with the radially-disposed members f g of the stock, so as'to avoid liability of shake of the sector in the stock, (especially if the sector be only semicircular or less in angular eXtent,) and the rule h when se- 10o cn red in the sector, as above described passes through a slot o in the central plane of the stock, said slot extending at least up to a radius from the center of motion at right angies to the base d.

The angular movement of the sector c in the one direction is limited by its end or by a stop p thereon coming against the rear side of the radial member f of the stock, in which position, which is that shown iny Fig. l, the one end of the :rule h, it' caused to project from the base d of the stock, will have its working edge at right angles thereto, while the working edge of the other end ot the rule bisects the rentering angle formed by the facesf g of the stock. By the angular movement ot' the sector and rule, as indicated by the dotted lines in Fig. l, the first-mentioned arm of the rule makes angles greater than ninety degrees with the base CZ, while the other arm makes any angle lessthan forty-live degrecs with the side or face f, the adjustment in this direction being only limited by the edge of the rule coming againstV4 the whole length of that face.

The sector and stock are marked, the one with a peripheral scale r, graduated to indicate with reference to an index s on the other the angular relation of the rule to the base CZ and the face fof the stock, the graduations of the scale having two series of numbers, the one, ranging from zero to forty-live degrees, serving to denote the amplitude of the angle made by the rule with the facef of the stock and the other, ranging from ninety to fortyve degrees, serving to denote the amplitude not of the angle made by the rule and the base of the stock, but of the complementary angle. The end of the rule which projects from the base terminates in a right-angled lug t for use in conjunction with the base for calipering pu rposes,wl1ile the other eX tremity uis beveled to a known angle (forty-tive degrees) for use in certain cases in conjunction with the angular adjustmentof the rule. The angular adjustmentof the stock may also be used in conjunction with the side faces e of the stock or with the Hats x, according to the exigences of the work. f

I claim- 1. A gage or instrument for marking off, gaging, setting'and adjusting work and tools, comprising a stock, a sector-shaped rule-carrier circularly adjustable in the plane of the stock, and a longitudinally-slidable rule Xed in a seat in the sector-shaped carrier so that the working edge of the rule passed through the center of motion of the carrier in all positions of longitudinal and angular adjustment, the stock having at one end a straight crasse face or base, and the opposite end in the form oi' a rentering right angle, Whose sides are of equal length and make equal angles with the said base, and whose vertex coincides with the center of motion of the rule-carrier, the rule being adapted to project from the base of the stock and also tointersect the reentering angle and to make with the said base and with one of the sides of the rentering angle Various degrees of angular adjustment, as described.

2. In the herein-described gage or instr-u; ment, the combination with the stock, the sector-shaped rule-carrier circularly adjustable therein and the rule slidably held in a seat in the sector, of the means of simultaneously fixing the rule in the sector and the sector in its seat, such means consisting of a device adapted to apply pressure between the circumferential member of the sector as an abutment, aud the back edge of the rule, the circumferential member of the sector being cross-cut between the points of abutment and of application of pressure so that the pressure will tend to expand it and thus simultaneously bind the rule and sector in their respective seats in such manner as to prevent any sliding or angular movement of the rule.

3. In the herein-described gage or instrument, the combination with the stock, the sector-shaped rule-carrier circularly adjustable therein, of a rule slidably held in a seat in the sector and projecting at opposite ends through a slot in the thickness of the stock so as to be presented in proper relation to the base and reenteri ng angular faces of the stock, for application to bevels and other angular work, the slot extending through a sufficient portion of the stock to permit of angular adjust-ment of the rule, as described.

4. A gage or instrument for workshop use for marking oft', setting outgaging and testing Work, and gaging, setting,and adjusting tools, comprising a stock, a sector-shaped rule-carrier fitted so as to be circularly adjustable between a circumferential circular seat in the stock and acircular boss concentric With such seat, and a rule slidably fixed in a seat in the sector and adapted to project Afrom the base of the stock and also through the center of the boss and the coincident vertex of a rentering right angle formed by the faces of the stock opposite to the base, as described.

Dated October 3, 1900.

ARTHUR JOHN LUCY.

Witnesses:

C. G. CLARK, T. W. KENNARD.

ICO

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