US1240474A - Lathe. - Google Patents

Description

E. J. MOORE & 0. s. HAWKINS.

LATHE. APPLICATION FILED 050.31. 1915- Patented Sept. 18,1917.

3 SHEIETS SHEETv I.

E. J. MOORE & 0. s. HAWKINS.

,LATHE.

APPLICATION FILED DEC.3l,vI9I5- 1,240,474.

Patented Sept. 18,1917.

3 SHEETS'SHEET 2- E. J; MOORE & D S. HAWKINS.

LATHE. APPLICATION FILED DEC.3I. I915.

Patented Sept 18, 1917.

3 SHEETSSHEET 3.

' rest proper in another position;

' low. box-shaped upright portion integral EDWARD J. MOORE AND DAVID siiAwKINs,

,JJI-IE FOUNDRY EQUIPMENT coMrANY, or

or CLEVELAND, onro, AssreNons' 'ro cLEvELANn'oHro, A conron 'rroN or Patented Sept. 18, 1917.

1, 1915. Serial No. 69,543.

OHIO.

LATHE.

1,240,474. Specification of Letters Patent.

Application filed December 3 To all whom it may concern: 8

Be it known that we, ,EDwARD J. Moon and DAVID S. HAWKINS, citizens of the United States, residing, at Cleveland, in the county of Cuyahoga and State of Ohio,have invented a certain new and useful lmprovement in Lathes, of which the followingis a full, clear, and exact description, reference being had to the accompanying drawings.

The object of this invention is to provide a lathe which shall comprise the minimum number of parts, which :shall be cheap to manufacture an efficient in service. eature of our invention is the peculiar arrangement of the motor and a means for adapting the same for driving the lathe in an effective manner. A specific object of the invention is the provision of a simple quickly adjustable and conveniently operable tool rest, forming part of our lathe.

. Our invention is hereinafter more fully described in connection with the accompanying drawings, and the essential characteristicsare set forth in the claims. 5 r In the drawings, Figure 1 is a side elevation of ourlathe; Fig. 2 is a plan ofthe same; Fig. 3 is a vertical longitudinal section through the head of the lathe showing the mounting of the motor and the method of drivin the same; Fig. i is an endelevation of t e head of the lathe; Fig. 5 is a transverse section through the head of the lathe showing the motor and driving wheels; Fig. 6 .is a section through thelathe bed showing details of the tool rest; Fig. .7 isa detail plan view of the tool rest showing the Fig. 81is a section through the lathe bed showing the tail stock; Fig. 9 is a detail in axial section of a device for securing work tothe' live spindle. V

Referring to the drawings. numerals 10 indicates the bed of the lathe shown as supported at one end on suitable legs 12 and having its otherend integral with and supported bv-an upright head portion 14:. As shown, the head portion and legs 12 are each prvided with outwardly extendingears or flanges 15 and 16 adapted to receive bolts or screws for securing-the lathe in position. 1

The head 14; comprises substantially a holby reference f the lathe and exthese ways where with the'bed or ways 0 tending upwardly above I suitable bearing portions 17 and 18 are,

formed which carry bushings 19 in which is journaled the spindle 20. The portions 17 andl8 areseparated by an intermediate slot which receives the driving wheel 22 secured on the spindle by suitable screws as indicated at 2e. Outside of the bearing portions 18 and 19 the spindle shaft 20 carries collars 25 and 26 secured thereon by suitable screws, and at the end toward the ways the shaft may pro ect threaded as shown at 28, for receiving a suitable face plate, headcenter or other work positioning or vdriving device. Fig. 9 illustrates one simple. way of securing the work to the live spindle. This consists of a collar 27 screwed onto the thread 28 and clamping against the end ofthe spindle a wood screw 29.0n which the work may be mounted. This is illustrative of any simple work holding device secured on the thread 28. v

c As a means for driving the lathe we have provided asuitable electric motor 30' having its. shaft 31 projecting beneath the wheel 22 and carrying a driving wheel 33 shown as having a concave surface closely fitting the convexlperiphery of the wheel 22. The axis of themotor is substantially parallel with the working axis ofthe lathe, and it is preferably secured in position by a pair of separated ears 35 extending downwardly from theouter end of the motor and embracing the ends of a boss 36, while a pin 37 extends through the ears and the. boss, securing the motor thereto in such a'manner that many swing about this pivot. The boss 36. is shown as carried on a rearwardly extendingbracket 38 integral with the end wall of the head 1 At the inner end the motor .(which is shown as extending through the en'd wall of the head 14:), is provided with ai ipair of bosses l0 having downwardlyopening recesses adaptedto receive compression springs 4 ;2,fthe other endsgof which areQcarried in recesses formed in bosses M integral with the head 14:. It will be noted from Fig. 5 that these springs are so separated as to stand on opposite sides of the centerfof the motor, and as they tend to press upwardly they may act with equal force'to bringthe engagement withthe driving wheel 33 into v wheel 22. The sides of the. bosses 4L0 preferably engage upwardly extending pro ections 4L5 inte-gra withthe bosses 4:43 These Proje tio er to position the motor 1 f prevent undue lateral strain on the pivot pin 37.

The bed 10 is divided in the usual manner, and the sides thereof extend inwardly to finished surfaces forming the ways 50. The ways proper comprise enlarged portions on inwardly turned flanges of the sides of the bed and are finished on theirupper surfaces in a substantially horizontal plane. The inner edges of the ways are preferably finished in vertical planes, the lower sides of the ways presenting surfaces preferably parallel withthe upper surfaces of the ways.

The tail stock of the lathe comprises a base portion 55' having horizontal and vertical shoulders fitting the corresponding surfaces of the ways, andfrom this base portion rise two endmembers 56 carrying a longitudinal bearing 58 for the dead spindle .60.

his member 60 is shown as provided with an integral centering point '62 and the bearing 58 is shown as split at 59 so that by operating a thumb screw G l the dead spindle may be released and lon itudinally adjusted with relation to the tail stock by means of its threaded engagement therewith and again clamp in any desired position. To clamp the tail'stock in any position to which it may have been adjusted longitudinally of the ways we have provided a screw having a non-circular head 66 standing between the end members 56 and extending downwardly through a clamp member 67. This clamp has shoulders engaging the under and inner surface of the ways (as shown in Fig. 8), while a hand operated nut 68 may securely'clamp the tail stock in any desired position on the ways by drawing the members 65 and 67 together in the usual manner.

The tool rest comprises a base member 7 0 shown as substantially circular and adapted to reston the upper surface of the ways and having a downwardly extending substantially circular boss fitting between the inner verticalsurfaces of the ways and carrying an outstanding arm 73' which is provided with a boss 74 having a vertical opening 75 adaptedto receive a cylindrical lug or shank 76 of the tool rest proper 7 7 This tool rest is shown as having'a wedge-shaped edge 78 formed integral with the body of the tool rest, and preferablystanding substantially at the level of the axisv of the spindles. Above the shank 76 is formed a recess adapted to receive the head of a screw 79 having a threaded lower end receiving a hand operated nut 80, for clamping the tool rest in any desired position with relation to the arm 73. The bodyof the tool rest, which is rotatable on the bed, is clamped in position by a screw 82having its head seating in a suitable recess in the base portlon and extending downwardly to a clamp Sat similar to the clamp '67 and receiving at its lower threaded end a hand operated nut 85 similar to the nut 68.

It will be seen from the foregoing description of'the tool rest that we have provided a tool rest which may be adjusted in any desired position. As stated the wedge shaped edge stands substantially at the height of the centers, and accordingly the tool rest may be used while standing either parallel with the axis of the spindles or at right angles thereto, as when working in front of a face plate, or when turning a disk, or this wedge-shaped edge may be positioned at any intervening angle. The tool rest may be readily adjusted for these various positions by releasing the nut 85 permitting the arm 73 to be swung around the screw 82 and the desired angle of the supporting edge with relation to the arm 7 3 may be obtained by operating the nut 80. We have found in practice that this tool rest is not only simple and efiicient but the operator may very quickly adjust the sameby operating the nut 80 with one hand while operating the nut 85 with the other. tool rest may be quickly brought to the desired positionand there clamped by simultaneously tightening-both the nuts 80 and 85.

From the foregoing description it will be seen that we have provided a very simple yet practical and durable lathe. The manner of driving the lathe has many advantages. The driving mechanism may, first,be cheaply manufactured, and, second, it is very efiicient in operation. Comparatively small motors such as we prefer to use, may be run at a very high speed, and therelative sizes of the wheels 33 and 22 may be such as to obtain the maximum power commensurate with the speed of the lathe and the work to be done. The parts are durable and are not liable to get out of order. The springs 42 which serve tohold the driving wheels together have the additional advantage of so supporting the motor that it is very silent in operation which is obviously a desirable characteristic.

Having thus described our invention what we claim is: i i I p p 1. I11 a lathe the combination with a frame havinga hollow standard, of a live spindle, a wheel thereon extending into said standard, and a pivotally mounted motor having a pulley'within the standard yieldingly bearing against saidwheel;

- 2. In a lathe, the combination with a frame, of alive spindle journaled therein, a

to cause ayielding engagement between the pulley and. Wheel.

5 means press 3. In a lathe, the combination with a frame having a hollow standard, a live spindle journaled in the frame at two points, a wheel secured to the spindle between its bearings and depending into the hollow of the frame, said frame having an extension, a motor pivoted to the extension and extending into the hollow of the frame, a pulley on the armature shaft of the motor engaging the under side of said wheel, and a spring pressing upwardly on the motor frame between its pivot and the pulley.

4. In a lathe, the combination of a hollow head standard, a bed extending from the standard in one direction, a bracket extending from the standard in the opposite direction, a motor hinged near its outerend on a horizontal pivot to the outer end of the bracket, said motor extending into the hollow of the standard, a spring between the inner end of the motor and standard tending to raise the motor, a live spindle journaled in the upper portion of the standard, a vertical wheel on said standard, and a pulley on the armature of said motor engaging sai wheel.

5. In a lathe, the combination with a frame having a bed, of a live spindle, a driving wheel thereon, a motor pivoted to the bed and having a pulley on its armature shaft adapted to engage said driving wheel, the motor frame having two downwardly extending recessed lugs, and a pair of com- Gopies of this patent may be obtained for five cents each, by addressing the ,ways and having a pression springs entering the recesses of said lugs and cooperating recesses in the standard to yieldingly press the motor upwardly to cause the pulley to frictionally engage the wheel.

6. In a lathe, the combination of a bed having a longitudinal opening providing ways, an arm having a portion adapted to rest on the top of said ways and a downwardly extending round boss adapted to substantially engage the inner faces of the ways and prevent lateral shifting of the arm, means for clamping the arm in place, and a tool rest pivotally carried by the arm.

7. In a lathe, the combination with a bed having an opening providing ways, an arm having a substantially circular adapted to rest on top of said ways and having a downwardly extending substantially cylindrical boss extending between the diameter substantially equal to the distance between the ways, a piece bridging the ways on the under side, a bolt connecting the arm and piece and equipped with a nut for clamping such parts together, a tool rest connected with the arm on a vertical pivot, and means for clamping such pivot.

In testimony whereof, we hereunto affix our signatures.

EDWARD J. MooRn DAVID s. nxwxnvs.

Commissioner of Patents,

Washington, D. 0.

p ortion

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