US398504A - Dividing-engine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

M3. PAUOETTE.

DIVIDING ENGINE. N0. 8Q8,504. Patented Feb. 26,1889.

f T T- U VEIJ OR- O- I a My lllll/z lTlllllllllllllllll NY PETERS, Phalo-Lflhagrapher. Washington. 0. c.

2 Sheets-Sheet 2.

(No Model.)

J.B.PAUOETTE.

DIVIDING ENGINE.

Patented Feb. 26, 1889.

FIG!!- howmho mpbnr. W2:

lUNiTnn STATES PATENT @rricn.

J AMES B. FAUCET'IE, OF LITTLE ROCK, ARKANSAS.

DlVlDING ENQlNE.

SPECIFICATION forming part of Letters Patent No. 398,504, dated February 26, 1889.

Application filed January 28, 1888. fierial No. 262,231. (No model.)

T to whom, it may concern:

Be it known that I, Janus l3. Fa'oen'r'rn, a citizen of the United States of America, residing at Little Rock, in the county of Pulaski and State of Arkansas, have invented certain new and useful Improvements in Dividing-Engines, of which the following is a 1 Specification, reference being had therein to the accompanying drawings.

The object of my invention is to construct a dividing-engine which will accurately mark a circular or segmental plate with tangentfitted to move tangentially to the arc of move ment of the tool-holder and held upon the" tangent-line while the graduation is etfected.

My invention also consists in novel mechanism for connecting the tangent-slide and marker to automatically effect a joint operation of the said slide and marker by a continuous movement of the machine, in novel mechanism for reciprocating the tool-holder and marker and for raising and lowering the same upon the work, and certain novel details of construction for supporting the toolholder and for adjusting the feed mechanism, which will hereinafter appear.

In the accompanying drawings, Figure 1 is a front elevation of amachine embodying my invention. Fig. 2 is a plan thereof. Fig. 3 is a side elevation of the same. Fig. 4: is an enlarged detail of one end of the feedshaft and mechanism for intermittingly moving the same. Fig. 5 is a section of the feed-shaft, showing the shaft-retaining ratchet and pawl.

The frame of the machine consists, mainly, of a table, A, supported upon legs A and carryin g the bracket-arm A bolted to the upper side of the table to support the gearing and the tool-holding mechanism, and hangers A projecting from the under side of said table for the support of the feedscrew and mechanism connected therewith.

The bracket-arm A has bez'irings u a projecting from its forward and overhanging end, which support a vertical shaft, B, and branch arms o extending laterallyt'rom the lower bearing, a. These arms have end bearings, a which support a horizontal driving-shaft, (7, also supported in the upper bearing, a, of the bracket A and serve to operate both the vertical shaft 13 and a horizontal screw-shaft, D, supported in the hangers A beneath the table.

The upper end of the vertical tool-operating shaft B is received in the under side of the bearing a and passes through the bearing a, and carries a bevel gear-wheel, E, between the said bearings (1 a, and also can ries a collar, 2), which rests upon the upper side of the bearing a and supports the shaft.

The bevel gearavheel E is driven by a similar wheel, E, upon the driving-shaft O, and

the lower portion of the shaft B carries a bevel gear-wheel, F, for operating the toolholder G. This tool-holder and. its radial carrier-arm H are supported from the lower end of the shaft B by suspension-arms H, connected by a sleeve, H having a vertical socket, 71, to fit upon the lower end of the said. shaft, and a screw, 7L, on said socket engages with an annular groove, 1), therein, which will thus both support the inner end of the radial carrier-arm H above the table and permit the outer end of said arm to swing in the arc of a circle. The outer end of the arm ll reciprocates in and is supported by a block, I, projecting upwardly from a sliding plate, I, fitted in a preferably dovetailed guide slot or groove, 1', formed in the top of the table, and is moved within said guide-slot by the screw-threaded pendent arm or nut on the horizontal screw-shal'tl), located beneath the table.

The sleeve H connecting the upper end of arms H, forms the bearing for a horizontal shaft, K, to which the bevel-gear F is secured, and the latter is driven by the gear F upon. the vertical shaft 13. The shaft K also car ries cam-wheels K K keyed thereto upon.

opposite ends. The wheel K serves to raise and lower the outer end of the tool-holder, and the wheel K serves to reciprocate the tool-holder G. This tool-holder consists of a bar suspended beneath the radial carrierarm H by the lever L pivoted at g to said arm I-[ and at g to the inner end of the toolholder, and is operated by the cam-wheel K and a spring, 7r, pressing against said lever L to reciprocate said tool-holder, and the arm L, pivoted on the pin g, has a bent arm, I, projecting therefrom, that passes beneath the said tool-holder bar to raise it at the proper time from its work. This arm L is operated upon by the wheel K and spring 7,1.

The tool-holder arm is held between guide- V plates 71. upon the under side of the arm H, to

steady its movement and hold it accurately in position. The plate or work M to be graduated is passed beneath the carrier-arm H and secured centrally beneath the shaft B, to bring its periphery in proper position to be operated upon by the graduating-tool, and is then secured upon the table by clamps A, and when said plate has acentral hole said hole receives the screw-bolt N, that passes through the table and serves as the pivot for the carrier-arm H and its supporting-frame, as said bolt is in the axial line of the vertical shaft B and fi s into a socket in the under side of the arm H, and serves to partially support and accurately center the pivot end of said arm.

To form an additional central support for the carrier-arm, a bracket, A, is secured to the inner side of the bracket-arm A and its free end receives the journal 72, pendent from the arm H.

The screw-sha it D is driven from the shaft C and receives an intermittent rotary motion by means of a crank-arm, C, secured to the end of said shaft, said arm having a crankpin carrying one end of a cord, 0, the other end of which is secured to and wound upon a threaded sleeve, D, fitted to revolve upon the end of the shaft D. Said cord carries also a weight, 0, which serves to rotate the said sleeve in one direction, while the rotation of the crank C operates upon the cord-O and causes the rotation of said sleeve in the opposite direction. The sleeve D carries a ratchet-wheel, D upon one end, which has in engagement therewith a pawl, (I, carried upon an arm, D secured to the end of the screwshaft D, and by the alternate rotat ion of said sleeve in opposite direction the screw-shaft D receives from it and through the ratchetwheel and pawl an intermittent rotary motion. The shaft. D is prevented from being turned backward by the rotation of the sleeve D upon it, either by frictional contact with its hearings, or preferably by a ratchet-wheel, P, secured to said shaft and by a pawl, P, pivoted to the hanger A.

The sleeve D is limited in its rotation or movements by arms D D, secured thereto, and stops D D secured to the table or its hanger, to intercept the movement of said arms at the end of their course.

The arms D D have slotted saddle-plates d, Fig. 4, and set-screws d passing through passed over by the operating-pawl at each of its movements.

The sleeve may be caused to make any number of revolutions or fractional part thereof without having the arms D D intercepted by the stops D D on account of the screwthread (Z upon the outer surface of the sleeve D, which engages with a blade, D vertically projecting from a bracket-plate secured to the table A, and thus the sleeve is moved enclwise upon the shaft and permits the arms to pass between their stops until the end of the required movement of the sleeve is effected and the distance between each graduation to be made upon the are accurately determined. The extent of movement of the sleeve D is also regulated in one direction by adjusting the length of the crank-arm O in a radial groove, 0 in the face of a disk, 0 secured upon the shaft C, to thus vary the throw of the crank and permit the cord to be wound any required number of turns or parts of turns upon the said sleeve to cause its rotation. In operation the tool-carrying arm is driven by the shaft to the full length of its movement (over ninety degrees) and then returned to its normal position by hand, and the nut i may be split to facilitate its removal and resetting upon the screw D.

The tangent-graduations are by the abovedescribed means marked with great accuracy upon the plate, and by changing the movement of the screw the said graduations may be varied to suit the size of the plate and the number of tangential divisions required. The length of every fourth and fifth or other subdivision of the graduations may be increased by varying the number of spurs upon the canrwheels on the shaft K, and by varying the length of any one of said spurs to thus increase the movement of the marker. The cutting-tool can be adjusted upon the tool-carrier to suit the radius of any are by sliding it lengthwise thereon; or a tool-carrier of proper length may be substituted for another. This cutting-tool may have a proper weight to indent the work; but a spring may be used to press thereon to deepen the marks.

The front edge of the table is provided with a scale in the present instance indicating two feet divided into twenty-four inches, and each inch can be subdivided into hundredths of an inch to set the machine at the start and verify its operation.

Having now fully described my invention, I claim 1. In a dividing-enginc, the combination of the table or work-holder and a radially-moving tool-carrying arm, with a tangent-plate connected with said arm for marking tangentgraduations upon an are or plate, substan tially as described.

Lil

In a dividing-engine, the combination of the table or work-holder and a radially-moving arm for carrying a reciprocating marking tool, a tangent plate connected with said arm, and an operating-screw for moving the tangent-plate and carrying the outer end of the radially nmviug arm, substantially as described.

3. In a dividing-engine, the combination of a table or work-holder and a radially-movin g arm having its outer end carried by an adj ustable tangent-plate, and a reciprocating toolholder supported upon said arm, substantially as described.

4. In a dividing-engine, the combination of ing arm carried by an adjustable tangentplate, a reciprocating tool-holder supported upon said arm, and cam for connecting and intermittently reciprocating said tool-holder, and gearing for moving said tangent-arm, substantially as described.

5. In a dividing-engine, the combination of a table or work-holder and the radially-moving arm pivoted above the center of the work-plate, the reciprocating tool-holder, a driving-shaft, K, above said center, and arms K for reciprocating said tool-holder, substantially as described.

6. In a dividing-engine, the combination of a table or work-holder and the radially-moving carrier-arm pivoted above the center of the work-plate, the reciprocating tool-holder, a driving-shaft, K, and an arm, K, for lifting said tool holder, substantially as described.

a table or work-holder and the radially-moving carrier-arm having its pivot above the center of the work-plate, the reciprocating tool-holder, a driving-shaft, K, and levers L I operated by cams upon the said shaft to respectively reciprocate and raise or lower the said tool-holder, substantially as described.

In a dividing-engine, the combination of a table or work-holder and an overhanging bracket, a vertical shaft supported thereon,

and a 1ool-carrying arm and 'toolholder suspended t'rom said shaft and to be rotated upon said shaft, and gearing for reciprocating the said tool-holder independently of the movement of the said arm, substantially as described.

r V i i i 4 l and passing into a recess in the lower end of the said carrier, substantially as described.

10. In a dividing-engine, the combination of a table or worlcholder and a drivingshaft supported above the table, a radially-moving tool-carrying arm and tangent-plate conn ected therewith, and a screw-shaft fitted under the tangent-plate and operated by the drivingsha'ft, substantially as described.

11. In a divi ding-engine, the combination of a table, the driving-shaft connected with and reciprocating the tool-holder, the radial arm and tangentially-located screw-shaft, a sleeve fitted upon said shaft, and means, as described,

for connecting the sleeve and shaft D to opa table or work-holder and the radiallyanoving arm and tangent-screw, a sleeve, a cord for rotating said sleeve, and an arm adjustably supported upon the shaft to operate the sleeve, substantially described.

14:. In a dividing-engine, the combination of a table, a radial tool-carrying arm, a tangentscrew, a sleeve upon said screw, an arm or arms secured to and projecting from said I sleeve, and stops supported upon the frame 7. In a dividing-engine, the combination of i for arresting the movement of said arms, subst-an ti all y as described.

15. In a dividingbnginc, the combination of a table, a radial tool-carrying arm, a tangentscrew, a sleeve supported upon said screw, stops supported upon the frame, and an arm or arms adjustably secured upon the sleeve cause it to move endwise upon the shaft, substantially as described.

In testimony whereof I affix my signature in 9. In a dividing-engine, the combination of presence of two witnesses. a table or work-holder and an overhanging j bracket, a vertical shaft suspended therefrom for operating the tool-holder, a tool-holder arm and carrier suspended from said shaft, an d a centering-bolt passing through the table

Images