US308685A - Hector mcquaeey - Google Patents

Description

.(No Model.)

H. 'MGQUARRY- AXLE GAGE. Q l

Patented Deo. 2 1884.

w 5 INVENTOR ifm@ ATTORNEYS.

PATENT OFFICE.

Y HECTOR MCQUARRY, OF ALLANDALE, ONTARIO, CANADA.

AXLE- GAGE.

SPECIFICATION forming part of Letters Patent No. 308,685, dated December 2, 1884.

(No model.)

To all whomt may concern..-

Be it known that I, HECTOR MCQUARRY, of Allandale, in the Province of Ontario and Dominion of Canada, have invented a new and Improved Axle-Gage, of which the following is a full, clear, and exact description.

My .invention relates to that class of gages used in bending the arms of vehicleaxles downward to give the proper set to the axles to cause the wheels to travel on a plumb spoke, and forward to give the proper gather tothe wheels; and the object ofthe invention is to provide a simple, readily-adjustable, and reliable tool for this purpose- The invention consists in various constructions and combinations of parts of the axlegage, all as hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a face View, partly broken away, of my improved axle-gage as applied to an axle. Fig. 2 is a back edge view of the gage. Fig. 3 is an enlarged face View of the inner end of the radius-bar and its connections to the main bar of the gage. Fig. 4 is a cross-sectional view on the line x x, Fig. 3, and looking in the direction indicated by the arrows. Fig. 5 is a cross-sectional View on the line y y, Fig. 3, looking toward the left. Fig. 6 is an enlarged back edge view at the inner end of the radius-bar. Fig. 7 is an enlarged face view of the outer or gaging head of the radiusbar, and Fig. 8 is an edge view thereof.

The letter A indicates the main bar of the gage, which I prefer to make of a metal plate about two inches wide, three sixteenths of an inch thick, and about iive feet long. At the outer end of bar A, I make it thickerby welding on a boss, a., so as to give substantial hold to the pin b, by which the radius-bar B is pivoted to the bar A, and also to the set-screw C, by which the radius-bar B is held flat against the face of the bar A. The hole in the bar B, through which the screw C passes, is sufficiently larger than the screw to allow the necessary play of the radius-bar on its pivot b, as hereinafter more fully explained.

Beyond the boss a of bar A the radius-bar B is bent downward ilatwise, as at Z1', and extends lengthwise from the pivot pin b for about ten inches.

D is ahead iitted on the main bar A, so as to be shifted along the bar and to any required place to bring the gage point or stud a on the front of the head against the collar e on the axle E, as in Fig. 1. A set-screw,d, threaded into the back of the head D, presses the key d onto the bar A to bind the head firmly to the bar. A gage point or stud, is iixed on the front edge ofthe radius-bar B, and the face of the stud which rests against the outer face of the collar c of the axle E is about in line with the center of'the pivot-pin b of the radius-bar. At its outer end the ra'- dius-bar carries a head, F, which may be shifted along the bar and set to bring the gagepoint a3 of the head opposite the extreme end e2 of the arm E ofthe axle which is to be set. A set-screw, f, threaded into the back of the head F presses the key f onto the bar B to hold the head immcvably to the bar. I form the gage-point ci on the end of a screw, G, which is fitted by right-hand threads cut on its larger portion just inside of its edge milled head g-into a boss or nut, H, fixed to the head F. The back end of the screw G is reduced in-size and is fitted by left-hand threads into a movable nut, I, which has a flat side, z', bearing on the face of the radius-bar B, so as not to be turned with the screw, but to move along the screw.

J is a gage-arm, which I screw down on top of aboss, h, fixed on the head F by' a nut, j, and spring-washer j', which hold the arm quite iirmly to the boss, but permit it to be swung on the screw-pink', which enters the boss h, and on which pin the arm J, nutj, and spring-washer j are placed.

K is a iixed head, secured by screws or rivets k to the main bar A a little inside of the inner end of the radius-bar B, so that room is left between the end of bar Band the curved shoulder Z of the head for the gib or key M, the shoulder Z, gib M, and the inner end of the bar B being curved in the arcs of circles struck from the pivot-pin C as a center.` The main body portion K of the head K is Slotted to receive the bar A, and the top face of its ,body portion is about level with the top faces IOO of the radius-bar B and gib M. Face-plates O P are fixed upon the head K so as to overhang the gib and radius-bar, respectively, and between these plates O P a trued washer, R, is placed, so as to be forced down upon the gib M by a set-screw, S, passed through the washer and threaded into the head rK to bind the gib at any point where it may be set. The gib M has a shoulder, m, which is its gage-shoulder and is set in proper position for the front edge, Z', of the radius-bar to stop against it, and the gib has or may have an opposite end shoulder, m', which strikes the back edge of the radius-bar to prevent the gib from slipping forward out of the head when the screw S is loose, the gib-shoulder m then serving also to prevent escape of the gib endwise the other way.

T is a stud or stop-piece which is fixed to the face of the radius-bar B, and acts to limit the backward movement of that end of the bar by Contact with the elongated end p ofthe plate P, and a plate, U, is hinged by a screwpin, a, to the back edge of the stud T, so that it may be thrown outward, as shown, or inward to come between the stop T and the end p of the plate P. The face of the radius-bar B is graduated, as at B, like a common rule, into inches and fractions thereof, from the pivot-pin C as a starting-point, for a length of twenty-eight inches, more or less; but the graduations need commence at a point about ten inches or more from the pin C, as shown. These graduations B ofthe radius-bar indicate the length of the spoke, and I call thein the spoke-rule7 of the gage. iVhen the screw G is turned in until its head g strikes the head F, or as far as it will go, and when the extreme ends of the gage-points a am, which touch the side ofthe axle, are inline with each other, and when the edge of the iixed stop Trests against the arm p of the head K, a line is drawn on or marked into the face of the main bar A along the front edge ofthe radius-bar B, which line I terni the base line,7 the points a a2 a3 of the gage then being in line and the point as in normal position, or so as not to indicate the set or gather of the axle-arm, as in Fig. l. Aseries of lines then are drawn along a straight edge on the face of the bar A, and parallel with the base-line, and one-eighth of an inch apart, and numbered consecutively, the line next the base-line being marked 1, the next line 2, and so on, as clearly shown in Fig. 3. These lines or graduations A on the bar A indicate the dish of the wheel-spoke, and I call them the dish-rule of the gage. The bend of the radius-bar B at b brings the gage-point a about in line flatwise of the gage with the point a', and point a2 is bent back to line with the points a a", so that the ends of allthree gage-points would rest on aline drawn through the longitudinal center of the axle.

The operation is as follows: The head D is shifted on thebar A, and set by the screw d, so that its point a will come outside of the axle-collar e and the point a2 outside of the calipers.

collar e, next to the arni E of the axle which is to be set. The head F will now be shifted and set by the screw j and the gage-point a directly opposite the extreme end et of the axle-arm, said point a3 being back as far as it will go, all as shown in Fig. l. The diameter of the axle-arm E just outside the collar c, or opposite the point a2, now is taken by a pair of ordinary outside calipers, and one point of the calipers then is placed against the outer or back end of the nut I, and the arni J is swung forward on its pivot 7i until the forward edge of the arm at the center line of the screw G will touch the opposite point of tlie The size of the axle-arm at the end e2 then is taken by the calipers, one point of which then is set against the forward edge of the arm .T, and the screw G then is turned out or forward until the back end of the nutI registers fairly with the opposite point of the calipers. The pitch of the reverse threads of the screw G being alike, it is evident that as the nut I is carried forward the whole amount of the taper of the axle-arm the point a will move forward but half that distance, or the exact amount of the true taper at one side ol' the axle-arm; or, in other words, the gagepoint a would be moved out to just touch the axle arm at the end c2 were the axle welded perfectly straight and true, which rarely occurs; hence the necessity of getting the true taper of the axle-arm without setting the gage-point a to the end of the arin. We will now suppose that the spokes of the wheel which is to run on the axle have a length oftwenty-fourinches,and are dished 7 five-eighths of an inch, the radius-bar B is swung on its pivot b until the twenty-four-inch niark on it touches or coincides with the line marked iive on the ba-r A, the gib M is now moved until its forward shoulder m rests firxnl y against the forward edge ot' the radius-bar at Z', and the screw S is tightened to bind the gib l fast in the head K.

It will be understood that in laying out the base-line of the dish-rule on the bar A by the radius-bar B the back edge of the stop T rested against the stop p, and the ends of all three of the gage-points a at a3 were in line.

when the point au was fully back and with the point er" set forward to indicate the true taper of the axle, and the stop T set against the stop p, no set of the gage could be made to bend the axle-arm forward by, to give the gather of the wheels when on the axle. I-Ience I have provided the hinge stop-plate U, which is of proper thickness when turned over between the stops T and p, to throw the gagepoint ai* back the required distance to indicate at the front of the axle-arm the point to which it is to be bent forward to secure the proper gather of the wheels. It will now be seen that the radius-bar B, carrying the gagepoint as, is free to be moved back and forth on its pivot b to carry its edge Z against the shoulder m of the gib M and its stop U against the stop p. The axle to be set will new be heated,

IOO

next the collar as usual, and with the radiusbar held to the shoulder m the gage will be applied to the under side of the axle to bend the arm E' down by until the end c2 of the arm touches the gage-point @which will give the correct set to the axle-arm to cause the wheel mounted on it to travel on a plumb spoke, and by applying the gage with its stop U against the stop p to the front of the axle, and bending the arm E forward until its end at e" touches the stop c, the axle-arm will be set properly to give the gather to the wheels. The radius-bar will of course be applied to the bottom and front of the axle alternately, or as may be required, to bend the axle-arm both ways in a single heat.

The adjustments of the gage may quickly.

be made, and the axles may be bent thereby both Ways with accuracy. The gage-point a2 may, it' desired, be fixed to the main bar A1 on line with the pivot b of the radius-bar, but I prefer to tix saidA point to the radiusbar, as shown and above described.

I-Iaving thus described my invention, what I claim as new, and desire-to secure by Letters Patent, is

l. An axle gage constructed with a nia-in bar, A, graduated for a dish-rule at A', a head, D, carrying a gage-point, ci', a radiusbar, B, graduated for a spokernle, as at B', and pivoted to the bar A at b, and carrying a gagepoint, c3, formed upon a right-and-left hand screw, G, entering xed and loose nuts H I, and working in the head F, a gage-point, a2,

fixed either to the bar A or radius-bar B in line with the pivot b of the bars, and means for stopping the movement of the inner end ofthe radiusbar both ways to indicate by the point a the downward and forward bend of the axle-arm, substantially as described.

2. The combination of the bar A, having the dish-rule A' and gage-point c', the bar B,having the spoke-rule B', and a gage-point, ai, capable of transverse adjustment, the head K, ixed to the bar A, and provided with the stop lathe gib M, havingashoulder, m, means for fastening the gib, the xed stop T and gather-stop U on the radius-bar, and a gagepoint, a", between the gage-points a' c3, substantially as shown and described.

3. The combination,with the bars A B, pivoted to each other, and graduated at A B,as specified, of the stops T U on the bar B, the stop p on the bar A, the gib M, having a shoulder, m, and the set-screw S, for securing the gib, substantially as shown and described.

4. The combination, with the radius-bar B, having the point a2, and connected to the bar A, having the l1ead'D,provided with point a', of the head F, provided with a screw, G, carrying the gage-point a3, and having right and left threads entering the fixed and loose nuts H I, respectively, and the gage-arm J, pivoted to the head, substantially as shown and described. x

5. The head F, constructed with a right-and left screw, G, carrying the gage-point ci? at its head, and entering the fixed and loose nutsH I, respectively,and the gage-arm J, pivoted to the head, in combination with the pivoted radiusbar B, having the point a'l and thelateral bend or defiection b', and the bar A, having the head D, provided with the point a', substantially as shown and described.

6. In an axlegage, the following elements in combination: amain bar, A, provided with the plate I?, having a stop, p, and with the adjustable head D, having the point a', said bar being graduated for the dish-rule, as at A', and carrying a gib, M, and means for fastening the gib, a radius-bar, B, pivoted to the bar A at b, graduated for the spoke-rule, as at B', and provided with the fixed and movable stops T U, and said bar B carrying the head F, adjustable along the bar, and provided with the 1ight-andleft screw G, entering the xed and loose nuts H Land carrying also the gagepoint c3, the gage-arm J, pivoted to the head F, and an intermediate gage-point, a, fixed either to the main bar A or the radius-barB, all constructed and arranged to operate substantially as shown and described.

HECTOR MCQUABRY.

'Witnessesz ROBERT HoDGsoN, H. MUoKLnsToN.

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