US555372A - Milling machine - Google Patents

Description

3 SheetsSheet 1.

(No Model.)

B P HALL MILLING MACHINE.

' Patented Feb. 25, 1896.

iNVENTOR WITNESSES RAHAM PHUTo-Lmifl. WASHINGTON D C (No Model.) 3 Sheets--Sheet 2 R. P.-HALL.

MILLING MAGHINE.

Patented Feb. 25, 1896.

INVENTUR (No M55151. 3 Sheets-Sheet a.

R. F. HALL. MILLING MACHINE.

No. 555,372. Patented Feb, 25, 1896.

IMarZZ'IaZZ.

UNTTED STATES PATENT OFFICE.

ROBERT FREDERICK HALL, OF BIRMINGHAM, ENGLAND.

MlLLiNG-MACHINE.

SPECIFICATION forming part of Letters Patent N0. 555,372, dated February 25, 1896.

Application filed August 12, 1895. Serial No. 559,087. (No model.) Patented in England June 1, 1895, No. 10,857.

To all whom, it may concern.-

Be it known that I, ROBERT FREDERICK HALL, managing director of the Cycle Components Manufacturing Company, Limited, a subject of the Queen of Great Britain, residing at Ferndale, Church Road, Moseley, in the city of Birmingham, England, have invented a certain new and useful Improvement in Milling-Machines and I do hereby declare the following to be a full, clear, and exact description of the invention, reference beinghad to the accompanying drawings, which form part of this specification, and for which said invention I have obtained Letters Patent of Great Britain dated the 1st day of June, 1895, and numbered 10,857.

This invention relates to machinery for the milling or rotatory cutting of various articles, such as cycle chain-whoels,wheel-hubs, bosses of cranks and other circular or part circular and irregular shapes.

The principal object of the invention is a machine which will simultaneously mill a number of articles and which can be attended to by a single operator.

The said machine works continuously durin g the taking off and putting on of the work and is to an extent automatic, as the operative can leave cutters operating upon two or more articles while he is attending to another or to others.

Figure 1 of the accompanying drawings represents, partly in vertical section and partly in elevation, a milling or circular-cutting machine with its accessory parts constructed according to my invention. Fig. 2 represents a vertical section of the upper and slide part of the machine upon the dotted line 50, Fig. 1, looking outwardly. This view shows the means of driving the work from oif a countershaft. Fig. 3 is a horizontal section of the said machine upon the dotted line A, looking downward. Fig. 4 represents a vertical section of Fig. 3 upon the dotted line B, looking inwardly. Fig. 5 is a horizontal section upon the dotted line C, Fig. 1, looking upward. Fig. 6 is a horizontal section upon the dot-ted line D, Fig. 1, but looking downward.

Passing vertically through the middle of a fixed bed a, which is supported upon the under side by upright legs a having feet a is an upright and cross split or divided main driving-shaft 1), consisting of upper and lower sections 1) 6 coupled together above the bed by a coupling socketed and inside grooved at its upper end 0 within which socket and its groove the lower feathered end b b of the section b of the shaft takes, and is capable of sliding therein, but carrying the coupling with it in its rotatory movement. The said upper part of the shaft b, which has an overhead driving-pulley b and clutch e for throwing the shaft into and out of gear, turns within bearings (Z d of a hanger- .bracket cl bolted to the ceiling of a workshop.

The clutch e is operated by a lever e pivoted at e.

The coupling 0, connecting the upper and lower sections of the shaft, is inside righthand screwed at c at its lower part, into which takes a like screwed stalk b partly surrounded by a loose hardened-steel clampingbush f, located within a vertical socket-bean ing g of an elevated and armed bridgebracket g, bolted at the ends of its ends 9 to the bed a. Also passing partly up the steel bush f is a plain part of the spindle 6 with a shoulder b between which and the under side of the said loose bush f a rotatory milling tool or cutter h is located, and is made to turn with the lower part, 6 of the shaft bythe impingement and frictional contact between the said bush and the shoulder, the said cutter being brought dead home to its bearing by the upper part of the shaft turning with it the slightly-traversing coupling, which, when rotated in a forward direction, screws itself upon the wormed end I) and is thereby made to advance and impinge upon the bush, which in its turn bears upon the bush and clamps the same firmly to the shaft, although, if necessary, the said cutter may take upon a feather formed on the part of the stalk of the shaftwhich it surrounds.

The extreme lower part 1) of the shaft has a feather 1) upon it, and surrounding the feather and shaft is a bevel-wheel b which gears in common with three bevel-wheels 1 each made fast to the inner end of .a shaft *6, passing through bearings i of legs a, and with the outer ends of each of the said shafts having a long driving-pulley i around which a band 6 taking also over a pulley 3', fast to the outer end of a traversing counter-shaft working in a hanging bracket a of the bed (1 passes. Each of these counter-shafts j has a worm j at its inner end, meshing with a worm-wheel j", made fast upon an upright shaft j Working through a bearing on of a slide-rest m, traversing the gap a in the bed a and held therein by guide-strips m adj ustably brought up to the chamfered sides of the slide by inclined-headed pins m The slides are traversed by traversing-screws n, having hand-wheels n for their operation, and having their inner ends '17 swivelly connected to the slides, and their middle parts passing through screw-boxes 0 of a bolted-on strip 0, secured to the fixed bed a.

The vertical shafts 7' carry work-tables j at their summits, to which the work is secured by a bolt 3' or otherwise, while each slide is limited in its inward traverse-4. e., toward the work-by a gage-stop 19, whose inner end is fixed in the slide and the other end passed through a hole 0 in the strip 0, while the extreme outer end of the stop-rod has a head 1), which comes against the face of the strip 0 and forms the stop. Thus, assuming that an article carried by the rotatory table requires to be milled, dressed, or cut down to a certain extent by the rotatory cutter, the amount of milling which it shall receive is regulated by the extent which the stop will allow the slide carrying the work to traverse toward the cutter.

Each machine is provided with a number of difierent stops, varying in length to corre spend with the kinds and depths of cut to be given to the work.

Referring again to the lower end of the shaft, the same works within a supplementary socket q, supported, through the intervention of antifriction-balls (1 by a socketed crossbearing q, bolted to the legs of the framing a, and with the vertical shaft adjusted and kept up to its work by a pin Q3.

Assuming that articles to be operated upon are secured to the work-tables, and assuming that the said tables are away from the cutter, then the operative starts the machine by throwing the clutch into gear, when the cutter is rapidly rotated and the work-tables, with the work, are slowly turned. The operative then brings the work on one table up to the cutter by turning the hand-wheel of the traversing screw of the slide and immediately the work has been gapped. The operative then leaves the cutting to proceed automatically while he attends to the bringing of the next slide with its work-table and work thereon up to the cutter, which acts in common on the several sets of work under operation. He then brings up the third piece of work and comes again to first piece, and if the milling or out should require to be deepened then he propels the slide farther and the cutting proceeds to a greater extent,which may be limited by the gage-stop being traversed toward the cutter beyond a certain extent. Should, however, the first piece of work have been fully milled, the depth of cut having been regulated by the gage-stop, the 0perative reverses the hand-wheel, when the slide is withdrawn an d the work is taken out of the range of the cutter and removed from the table and fresh work substituted for it, when the operations described are repeated.

Having fully described my inventiomwhat I desire to claim and secure by Letters Patent is 1. In a milling-machine, the combination of a fixed bed, a central shaft extended upward through said bed and carrying asingle cutter above the same, a series of radiallydisposed slides mounted in the bed, a series of rotary work-tables mounted in said slides in the same horizontal plane with the cutter and surrounding the same, and traversing worm-gearing for said tables, substantially as and for the purpose described and set forth.

2. In a milling-machine, the combination with a single and central cutter, mounted on an upright shaft and coming above the plane of the bed, which carries radially disposed and working slides traversed by swiveling propelling and repelling screws suitably working within screw-boxes in the fixed framing, of work-tables surrounding and coming in the same horizontal plane as the cutter and located above the bed and carried by vertical shafts working through bearings in the said slides and having a rotatory motion imparted to them by traversing worm-gearing carried within bracket bearings attached to the slides, substantially as and for the purpose described and set forth.

3. In a milling-machine, the combination with a single and central cutter, mounted on an upright shaft and coming above the plane of the bed, which carries radially disposed and working slides traversed by swiveling propelling and repelling screws suitably working within screw-boxes in the fixed framing, of work-tables surrounding and coming in the same horizontal plane as the cutter and located above the bed and carried by vertical shafts working through bearings in the said slides and having a rotatory motion imparted to them by traversing worm-gearing carried within bracket-bearin gs attached to the slides and driven by band and pulley gearing receiving their motion through radially-directed counter-shafts running in bearings in the framing and carrying bevel-wheels at their inner ends meshing with a bevel-wheel on the vertical and principal shaft, substantially as and for the purpose described and set forth.

4. In a milling-machine, the combination with a single and central rotating cutter surrounded by radially directed and traversing work-carrying slides driven by reciprocating gear whose motion is received from stationary gear driven from the vertical shaft upon which said cutter is mounted, of a divided shaft split at a point above said cutter and with the parts connected by a lengthwise-adjustable coupling whose socketed upper end takes upon a feathered lower part of the upper section of the shaft and whose insidescrewed lower part takes upon the screwed upper end of the lower part of the shaft, the lower end of said coupling impinging upon a hardened-steel bush located between it and the top side of the rotatory cutter whose lower side rests upon a shoulder of the shaft formed above the plane of the bed, substantially as and for the purpose as described and set forth. 5. In a milling-machine, the combination with a single and central rotating cutter carried by the lower part of a vertical shaft and coming between the opposed ends of radiallytraversing work-carryin g slides, of a bridgebraeket having a bossed bearing wherein is located a hardened-steel bush surrounding the upper part of the adjustable lower section of the shaft and coming between the shaftcoupling and the cutter, substantially as and for the purpose as described and set forth.

6. In a milling-machine, the combination with a split vertical shaft, whose upper and lower sections are united by an adjustable coupling, and having mounted upon the upper part of its lower section a rotating cutter disposed between radiating work-carryin g slides traversing between guides and between gaps of the bed, of bevel-gearing meshingwith that wheel carried by the lower part of the shaft connected thereto by a feather and with the lower end of said section of shaft working within a lower bearing-socket and being adjustable therein by a pin taking through the bottom of the said socket, substantially as and for the purpose as described and set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 31st day of July, 1895.

ROBERT FREDERICK HALL. lVitnesses:

HENRY SKERRETT, ARTHUR T. SADLER.

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