US113653A - Improvement in machines for facing t-heads - Google Patents

Description

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JOHN GRIFFITH AND GEORGE W. WUNDRAM, OF NEW YORK, N. Y.

Letters Patent No. 113,653, dated April 11, 18.71.

IMPROVEMENT IN MACHINES FO\R FACING T-HEADS.

The Schedule referred to in these Letters Patent and making parl: of the same.

To all whom 'it 'mag/'concern Be it known that we, J oHN GRIFFITH and GEORGE W. WUNDRAM, ofthe city, county, and State of N ew` York, have invented a new and improved Machine for Facing T-Heads; and we do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use. the same, reference being had to the accompanying drawing forming part of this specification, in which drawing- Figure l represents a longitudinal vertical section of this invention.

Figure 2 is a plan or top view thereof.

Similar letters indicate corresponding part-s.

This invention relates to amachine composed of two head-blocks, each of which forms the bearings for a spindle carrying a cutter-head or chuck, so that both ends or faces of a T-head or other similar article can be acted on simultaneously.

'lhe head-blocks slide on a suitable bed or on shears, and they are subjected to the action ofeccentries or cams in such a manner that the cutters secured in the chucks are simultaneously driven in toward .the article t-o be faced and then drawn back, and

the work is accomplished with the least possible hand labor.

The bearings of the eccentrics are subjected to theV action of adjustable wedges, whereby said bearings can always be kept in close contact with the eccentrics and all lloss of motion at that spot cau'be avoided.

The chucks or cutter-heads are also subjected` to the action of wedges and nuts, so t-hat the points of the cutters can always be brought in the required position without trouble or much loss of time.

In the drawing- The letter A designates the bed or shears, on which are fitted two head-blocks B.

Each of these blocks forms the bearings for a spindle, D, on the inner edge of which is mounted a chuck or cutter-head, E.

In these chucks are secured the cutters o, which are used for facing off T- heads or other articles, and the shape of which is changed according to the work to be accomplished.

The article to be faced is fastened in a resi, F, between the chucks E, and in such a position that thevfaces to be acted on are equidistant from the points of the cutters in the two chucks, said rest being provided with a simple hand-screw for the purpose of quickly securing the article to be faced.

The chucks Earc fitted on the ends oi" the spindles D so that they can be removed in or out, and they are held in position by nuts a on one and keys or wedges b on the other end.

By releasing the nuts and driving the wedges in the chucks are set toward each other, and by releasing th'e wedges and screwing up the nuts the chucks are set apart so that the points of the cutters in the chucks can be readily adjusted in the correct position toward the face of the article to be acted upon.

Each of the spindles D derives its motion from short counter-shafts G, whichV carry a pulley, H, and pinions I gearing in cog-wheels J, mounted on the appropriate spindles.

rIhe head-blocks B receive a reciprocating motion toward and from each other by means of eccentrics c, which are mounted on the ends of vertical arbors d, having their bearings in brackets c, secured to the bed and connected by bevel-wheels ff with a horizontal shaft, g, which extends throughout the entire length of the bed.

This horizontal shaft connects, by a train of cogwheels, li, with one of the spindles l), one of the cog-wheels, It', in the train being mountedon a lever, t', so that it can be thrown in andl out of gear with the spindle, so that the shaft g can be started or stopped at pleasure without interfering with the motion of the spindles D.

The eccentrics c work in slides j, which are fitted Y into cavities k in the head-blocks B, and confined therein by wedges l, which are adjustable by screws and nuts an, so that the slides are free to move in a transverse direction independently of the head-blocks, but their motion in the direction of the shears is connnuuicated to the head-blocks.

If the slides wear out in their cavities the wedges l are set up and all loss of motion is thereby avoided.

By the action of the eccentrics c, therefore, the chucks carrying the cutters are caused to move toward and from each other, the throw of the eccentrics being 'made to conform to rthe nature of the article to be faced, so that the operation of' facing T-heads or other articles of a sin'lilar nature can be effected with perfect accuracy and with the least possible hand labor or loss of time. V

The motion of the shaft g and of the eccentrics c is so timed that the cutters are caused to move iu toward the article to be faced with the required speed, and by throwingsaid shaft out of gear with the spindle, and turning it back by hand, the head-blocks can be moved back.l

What we claim as new, and desire to secure by Letters Patent, isl l. The combination of the rotary shaft D, chuck E, provided with the cutters o, wedge b, and nut a', operating substantially as described, for the purpose Specified.

2. The wedges l, in combination with the slides j, cavities la, eccentrics c, and head-blocks B, substantially as set forth.

JOHN GRIFFITH. G. W. WUNDRAM. W'itnesses:

W. HAUFF, E. F. KAs'JnNHUBnR.

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