US253890A - Island - Google Patents

Description

(No Model.)

C. D. ROGERS.

MACHINE PoR GRINDING 0R POLISHING THB HEADS 0F SG'RBWS.

N. 253,890. -Patented Feb. 21,1882.

INVENTDFM N. PETERS, Puma-Lichugnplwr. wzmingmn, D. C.

o UNITED ,STA-TES lPATENT OFFICE.

CHARLES D. ROGERS, OF PROVIDENCE, RHODE ISLAND, ASSIGNORIC THE AMERICAN SCREW COMPANY, OF SAME PLACE.

MACHINE FOR GRINDlNG R POLISHING THE vHEADSl 0F SCREWS.

SPECIFICATION forming part of Letters Patent No. 253,890,dated February 21, 1,8872.

y i Application flied october 12, 1881, (Nomodel.) l

To all whom it'mcty concern:

Beit known that I, GHAnLns D. Revenus, of'

thecity and county of Providence, and State of Rhode Island, have invented a new and useful Improvement. in Machines for Grindspring or other suitable jaws for holding the work, which spindle is capable'ofsome-longitudinal movement in its hearings, and is piv oted so that it can be moved in the are of a circle in front of the wheel, and is also mounted so that it can be moved radially away from the wheel and swing in the are of a circle into a position to facilitate the insertion and re,- moval ofthe work.

Referring to the drawings, Figure l represents my improved machine in plan. Fig.'2 shows the same inside elevation. Fig. 3 rep resents the bed and spindle in the positions they occupy when thework is to be inserted or removed. Fig. 4 shows, in vertical section, the spindle and the parts in and upon which it is mounted. j

' A is the frame of the machine, upon which the grinding or polishing wheel B is mounted,

so that it may be made to revolve by a belt passing over the pulley b. As shownin Fig. l, the face of the wheel B is provided with one or more peripherical grooves of a contour adapted to the Work to be operated upon; but the faceof the wheel may be flat, it' desired.

To the frame A an arm, A', is adjustably .secured, which arm supports a stationary plat form, C, adjustably attached thereto.

Upon the platform C the movable bed D and the frame E, which supports the spindle F, are mounted in' a manner hereinafter toA be described. As shown in Fig. 4, the spindleF is hollow, and its inner end is provided with The spindle F is mounted gitudiually to and from the Wheel B, and itis 1" provided with a pulley, G, splined thereto for giving rotation to the spindle. For the purpose of controlling the longitudinal move- 6o ments of the spindle and affording a means by which the'work can be pressed against lthe wheel, a disk or buttomj", is loosely mounted on the outer end ot' the spindle, which button is intended to be grasped by the hand'of the 65 operator. For the purpose ot' ejecting the work after it is finished the spindle is provided with an axial spring punch, g, as shown in Fig. 4.

The spindle-frame E ispivoted to the bed 7o D by a pin, e, so that said frame can swing in the arc ofa circle on'said bed, in order that all parts of the screw-head may be presented to and be acted upon by the wheel B. The outer faceof the bed D is preferably in the form of the arc ofa eircle,and is provided with stops d djto limit the movements ot' the spindleframe. Y V

The longitudinal movement of the spindle F:in the frame E is only suflicient to allow the 8o Work to be slightly withdrawn from the wheel, and its movements in the arc of a circle are only such in extent as will secure thepresentation ot' all parts ofthe convex head of the work to the wheel B. that some means be employed whereby the inner end of the. spindle F may be sufficiently withdrawn fronithe wheel and the spindle may occupy such a position with relation tothe It is'necessary, therefore, 85

wheel as that the work can be conveniently in- 9o sorted and removed. For this purpose the bed D, to which the spindle.- frame is pivoted, is

made movable upon the platform C, so that the said bed and the spindle can be moved radially away from the wheel, in order that the spindle may be swung into a position parallel, or nearly so, with, the face of the wheel and be sufficiently removed therefrom to allow the work to be conveniently inserted and withdrawn, as shown in Fig. 3.

IOO

The manner in which the bed D is mounted ou the platform C, so that it may have the movements just described, is as follows: The pin e, which pivots the spindleframe to the bed D, passes through said bed, and also pivots it to a slidin g block, H, which is dovetailed into the platform C. At all times the block H is pressed toward the wheel B by a spring, J, located in a groove in the platform C, and bearing against said platform and a lip, h, on the block H, as shown in Fig. 4..

As shown in each of the figures, thc bed D is provided with a handle, D', the inner end of which, as shown in dotted lines, is wedgeshaped or rounded to engage with a recess, c, in the outer edge of the platformwhich edge is the are of a circle-and lock the bed D thereto by the force of the springvJ; The rounded inner end of the handle D', in connection with the recess c, forms a stop to limit the inward movement of the bed D and spindle-frame E. By pulling upon the handle D the block H, the bed D, the frame E, and its spindle may be moved rearward-that is, radiallyfrom the wheel. The bed D may then be moved in the are of a circle to 'the right or left, the inner end of the handle D engaging the edge of the platform C, and the spindlemay be moved into the position shown in Fig. 3, in which position the work can be ejected by the springpunch g, and new work can-be readilyinserted.

The operation of the machine is substantially as follows: The bed D being locked to the platform C in the position shown in Fig..1, the spindle F and wheel B being in revolution, and work being inthe spindle, the operator seizes the button f and presses the work upon the wheel, at thesame time movingthe spindle and its frame from side to side in the arc of a circle until the head of the screw is iinished. The handle Dl is now seized and the bed D, the spindle, and its frame are moved' the edgeof the' platform, and the'spindle is moved to a'position parallel, or nearly so, with the face of the wheel. The springfpunch. g is now operated to eject the work, a new screw isinserted, the bed D is returned to-itsoriginal position, and the operations above described are repeated.

H From the foregoing descriptionit will be understood that during the operation of inishin g the work the bed Dand platform C are locked together, are stationary, and are practically one, but that when the work is to be inserted or removed the bed can be unlocked from the platform, can be moved rearward and in the arc of a circle, thereby withdrawing the work to such a distancevfrom the wheel that the latter will not interfere with the removal and insertion of the work.

As hereinbefore remarked, the platform C is adjustably mounted onthe arm A. This is done in'order that the work may be presented to a new surface on the face ot' the wheel when the latter becomes worn, and the arm A is also adjustable on the frame of thc machine, in order that the work may be brought up to the wheel as the latter becomes reduced in'size.

What I claim as my invention, and desire to secureby Letters Patent, is

1. The'combination, as before set fortlnof a grinding or polishing wheel, a work holder which -iscapable of revolution and longitudinalmovement in its bearings, a frame in which* said holder ismounted, aslidingblock to'which said frame is pivoted, and a platform adjustable laterally and longitudinally with relation,

to the wheel upon' which said sliding block is mounted,substantially as and for the purposes specified.

2. The combination,` as beforeset forth, of aI grinding or polishing wheel, a work-holder which is capable of revolution and longitudi nal movementin its bearings,a frame in which said holderisjournal'ed, a bed, D, upon whichI said frame is mounted, a sliding block to which saidframe and bed are pivoted, a platform'for supporting the parts, and suitablemeans, as

described, for temporarily locking the bed to` the platform, substantiallyas-set forth.

3. The combinatiolnas before set forth, of a grinding or polishing wheel, a'spindle which isV capable ot' revolution and longitudinal movement in its bearings, suitable jaws attachedito said spindle for holding thework, a frame in which said spindle is journaled, a bed, D, upon whichsaid frame is mounted, a sliding block to whichl said frame ands bed are pivoted, a springthepressure of which causesthe' saidy vparts to'movetoward the grinding-wheel, and' a stop to limit the extent ot'theirforward move#- ment.

CHARLES D.` ROGERS.

Witnesses:

W. ELTHURsroN, I. KNIGHT.

IOC

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