US1114068A - Device for turning crank-pins on engine-shafts. - Google Patents

Description

A. THOMAS. DEVICE FOR TURNING CRANK PINS ON ENGINE SHAFTS. APPLICATION FILED mu 25.19144 1,1 14,068. Patented 00b. 20, 1914;

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A. THOMAS.

DEVICE FOR TURNING CRANK PINS 0N ENGINE SHAFTS.

APPLICATION FILED MAY 25,1914. 1,1 14,068. Patented 00a. 20, 1914.

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WITNESSES? ATTOHA'E F.

I J" VEN TOR AUGUST THOMAS, OF SAIII. LAKE CITY, UTAH.

DEVICE FOR TURNING CRANK-PINS ON ENGINE-SHAFTS.

speciacation of Letters Patent.v

Patent-ed Oct. 20, 1914.

Application filed May 25, 1814. Serial No. 840,939.

To all whom it ma concern:

Be it known t at I, Atieusr THOMAS, a citizen of Germany, residin at Salt Lake City, in the county of Salt ake and State of Utah, have invented certain newand useful Im rovements in Devices for Turning Crankins on Engine-Shafts, of which the following is a specification.

My invention relates to devices for turn- "ing crank pins on the crank shafts of engines, and has for its object to provide a simple and efficient device which may be secured on a turning lathe of the'ordinary make, by which a crank pin may be turned on the crank shaft of an engine without removing the shaft from the lathe or changin the axial point. -Tbese objects I accomplis with the device illustrated in the accompanying drawings in which similar letters and numerals of reference indicate like parts throughout the several fi res and as described in the specification orming a part of this application and pointed out m the appended claims.

In the drawiiws in which I have shown a substantial embodiment of my invention,

Figure l is a fragmentary view in'elevation of a turning lathe with my device secured thereon in position to turn one-of the four crank pinsof the crank shaft held in said I lathe. Fig. 2 is a side elevation of the device, looking in the direction of the arrow and on line w a: of Fig. 1 with the crank shaft given one half turn. The position .of the device as shown in Fig. 1 is herein shown in dotted lines. Fig. 8 is a detail in side elevation of one element of the combined tool rest. Fig. 4 is airont elevation of the same and Fig. 5 a plan view. Fig. 6 is a. detail in side elevation of the tool stock housing. Fig. 7 is a front elevation of the same. Fig. 8 is a horizontal section on line 3/ y of Fig.

6. Fig. 9 .is a detail in side elevation of the centering guide case. Fig. 10 is a plan viewof the same. Fi 11 is a detail in'side elevation of one of t e gripping 'aws. Fig. 12 is a detail in side elevation o the opposin jaw. Fig. 13 is an end view of either of sai gripping jaws. Fig. 14 is a plan view of the centering case wlth the gripping {aws removed. Fig. 15 is a detail in side e ovation of the same. I

My device is intended as an attachment tical standards 3 and 4 which are spaced apart and secured in parallel relation to each other by the head plates 5. V

A circular housing B is slidably-carried between and by said standards 3 and 'l and a portion thereof is operated between said standards. Said housing consists of two semi-circular members 7 and 8 suitably fastened together to form a circle of their inner peripheries. ,Each of said members 7 and 8 has its inner periphery cut to form a V- shaped channel 17 therein. One edge of said member 7 is extended to form a wing 9 which is operable between said standards 3 and 4. On said win is rovided the transversely dis osed gui e ri s 10 which are 0persted in -shaped channels cut in the said standards 3 and 4. The outer end of said wing 9 is laterally flanged to engage the edge'of said standard 4'. A channel 11 is cut or is provided in one side of said wing and exten s as an opening in the said flanged portion, within which channel a tool stock 12 is operated. The cutting tool 18 is secured in said stock 12, and the usual screw feed 14 is provided to adjust said cutting tool to its work. A circular guiding case 15 is operated within said housing B, and its peripheric face is given an A-shapc as at 31 to engage within the said V-shapcd channel 17 cut in the inner periphery of said housing. One portion of said guiding case 15 is extended to form a grip case 16, and the face of said case 15 is cut out. Said grip case 16 is given a circular exterior on three sides and is cut out on the other side. The interior of said grip case is cut out in rectangular form as shown in Fig. 9 to receive the shaft gripping elements shown in Figs. 11, 12, and 15. The shaft centering and gripping elements consist of a U-shaped centering case 18 with ortions of the, sides cut away to form shoal ers 21 thereon. Set

screws 22 are provided in the side portions of said centering case to engage the engine shaft by which said shaft is firmly gri ped. Centering pointers 23 are also dctachab y secured on said centering case by means of which the axis of the intended crank in may be positioned relative to the axis of t e shaft. The-gripping jaws 24 and 25 are provided to operate within the said centering case by which the shaft is held in position. They are adjusted and held in contact with the said shaft by set screws inserted through the openings 26 and 27. The assembling and operation of m device is as follows :The commonly use tool post is removed from the lathe and the vertical standards are fastened on the tool rest R by inserting the T-bolt 1 through the horizontal bracket rib 2, a nut screwed on said bolt will hold said standards vertically in place. The commonly used screw for movin" the tool rest transversely across the lathe is removed, this allows the tool rest and said vertical standards 8 and 4 to move back and forth on the lathe as the movements of the other elements of my device and the rotation of the shaft on which the pin is to be turned requires. The said semicircular members 7 and 8 are fastened together around the said gluiding case 15 by the bolts, the A-sha e rib 31 on the peripheric face of sai guiding case 15 engaging within the channel 17 in the inner ace of said members 7 and 8, this allows free rotation of said centerin case within housin 13. The said housin is then inserted between said stander 3 and 4 by removing the upper head plate 5 and insertin the wing 9 between said standards. Said wing is free moving u and down between said standards, this a lows free vertical movement of the said housing. as the rotation of the shaft requires. h centering case 18 is insertedwithin said rip case 16 and said guiding case 15 tirou h the open face 0 the utter, the shoul era 21 of the centering case 18 engaging the shoulders 20 of the guiding case 15. The gripping jaw 25 is next inserted within the centering case 18 and en aged by a set screw operated through the o e 27.

In using my device the shaft, having a in thereon to be turned, is centered in the athe' in the usual manner and inserted through the device ad'acent the gripping .'aw 25. The size of t e pin to be turned icing predetermined the pointers 23 are set as near the axial center as may be and yet leave the portion of the crank shaft from which the intended crank pin is to be turned free. The distance from the axis of the shaft to the axis of the intended crank pin being known, the device is movedrelative 1,114,oee

e said to the said shaft until the centering pointer 23 on the side of said centering case 18 is in lateral alinement with the axis of the intended pin and the other pointer 23 indicates that the pin axis is in its line. The device is then set firmly on the shaft by the other gripping jaw 24 as adjusted by the set screws 26 and 22. The pointers 23 may then be removed, as ordinarily they are in the way when operating the lathe. The tool stock 12 and the cutting tool 13 are then brought into the cutting position by the usua screw feed 14. When the shaft is then rotated the pin will be revolved therearound, and as so revolved the housing B and all the parts of the device will follow the pin in its revolutions, the vertical sliding of the wing portion of the housing between said standards and the horizontal sliding of the tool rests on the lathe carriage allowi' such revolutions.

The device is moved longitudinally i the cutting work by the usual movement of .the carriage on the bed of the lathe. The U-shaped centering case remains in its fastened osition and does not move longitudinally with the cutting elements.

Having thus described my invention I desire to secure by Letters Patent and claim 1. A device for turning crank pins integral with a crank shaft, comprising a lathe; means for rotating the shaft on its axis; a cutting tool; a carrier for said tool; and means for securing the carrier on the lathe which will allow limited lateral and vertical movement of said carrier, said means consisting of a transversely movable tool rest and a vertically movable housing.

2. An attachment for a lathe to turn crank pins integral with a crank shaft, con I prising a cutting tool; a carrier for ea, tool; means to secure said carrier on t" lathe which will allow said carrier the same movement as-is imparted to the pin, said means consisting of a transversely movable tool rest; a vertically movable housing; and means to guide said carrier longitudinally along the pin, said means consisting of a guide case operable in said housing; and a grip case laterally movable in said guide case.

3. An attachment for a lathe to turn crank pins integral with a crank shaft, comprising a cutting tool; a carrier for said tool; a tool rest transversely movable on the lathe; a vertically movable housing; a guide case operable in said housing; a grip case laterally movable in said guide case; and means to detachably fasten said grip case on said shaft.

4. An attachment for a turning lathe to i turn crank pins integral with a crank shaft,

mprising a tool for o erating on said pin; Tn testirnony whereof I have afiixed my a carrier for said too a tool rest transsignature 1n presence of two wltnesses. YBISGly movable on the lathe; a vertically AUGUST THOMAS. movable housing; a gmde case operable 1n 5 said housing; a grip case laterally movable Witnesses:

insaid guide case; and means to detachably J ACOB Prmrrna, fasten said grip case on said shaft. MYRTIE NEBEKER.

Copies of this patent my be obtained tor flu cents each, by addressing the Oommluioner of Patents,

Washington, I). 0.

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