US991345A

US991345A - Grinding-machine.

Info

Publication number: US991345A
Application number: US56583710A
Authority: US
Inventors: Edward Wilson Mitchel
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-06-08
Filing date: 1910-06-08
Publication date: 1911-05-02
Anticipated expiration: 1928-05-02

Description

B. W. MITGHEL. GRINDING MACHINE.

APBLIOA'IIONIILED JUNE 8. '1910.

991,345. Patented May 2, 1911.

4 SHEETS-SHEET 1.

aymmwtoz E. W. MITCHEL.

GRINDING MACHINE.

APPLICATION FILED JUNE 8, 1910.

Patentd May 2, 1911.

4 SHEETB-SHEET 2.

witnesses E. W. MITGHEL. GRINDING MACHINE. I APPLICATION FILED 111111: 8. 1010.

4 SHEETS-SHEET 3.

q 5 Q '1 I amine/Mao Patented May 2,1911. v

E. W. MITGHBL.

GRINDING MACHINE. APPLIOATION FILED JUNE 8. 1910.

991,345. Patented May 2, 1911.

4 SHEETS-SHEET 4.

H I! l I' M N II I iiz lh MIM hum' "MPH: I I h II a wane/ 000 Machines, of whichthe following is a speci State of Kentucky,

' My invention relates nn'wann wILson MITCHEL,-

I GRINDING-MACHINE.

To all whom it may concern: I A

Be it known that I, EDWARD W. MITCHEL, a citizen of theUnited States, residing at Lexington, in the county of. Fayette and have invented certain new and useful Improvements in Grindin fication to an improvement 1n grinding machines, and the object is to provide means whereby the speed of thecarriage can be changed from a roughing out to a finishing cut, and the cross feed of the grinding.whee l'stopped.

he invention consists in certainnovel features of construction and combinations ed upon the shaft,

-with a gear wheel of parts which "willbe hereinafter fully de' scribed and'pointed out in the claims.

1 is a view in side elevation; Fig. 2 1s a longitudinal cross-sectional view ';'Fig. '3'is a vertical sectional view; Fig. 45 is a top plan View of the tripping mechanism-; Fig. 5 is an end view of the machine; Fig. 6 isa de-- tail view of the belt shifting mechanism; and Fig. 7 is a detail view showing the clutch shaft with itsclutches. V

A represents the J machine, and B is the carriage, which is provided with bearings 1, 1, which support the shaft to -*be worked upon, as indicated at 2. A vided on one of theIbearings for transmitting a rotary movementto the shaftLfA driving shaft 4 is mounted upon the frame,

and has a pulley 5 which is, adapted tore-- ceive power from any suitable source for rotating the shaft 4.. A double clutch member 6 is splined upon the shaft, adapted to make engagement with either'of the clutch faces 7 and 8. Pinions 9and' 10 are mountand are adapted to mesh 11, which is mounted upon a shaft 12. A shaft 13 isadapted to be thrown into engagement with the shaft 12 by the clutchmember 14 which is keyed to the shaft 13 by means of the pin 15. The rod 16, which s connected to the clutch member 14, is adapted to reciprocate the clutch member 14" for connecting or dji'scom Specification- Letters Patent. Application flied. lung 8, 1910. Serial so. saas's'z.

I which is adapted to mesh with 3 In the accompanying drawings :Figure' ciprocating pulley 3 is proor tnx-meronfxnnruoxr.

heating the shafts 12 and 17 is mounted upon the adapted to be rotated uponthe rotation of the shaft 12; upon the shaft 19, which'gear wheel meshes with the'gear wheel 17. Shafts 19- and 20 are provided with cone-shaped pulleys 21 I, and 22, respectively, a' belt two pulleys together.- The rotation o the shaft '12 transmitting motion to the gear .wheel 17, causes the shaftl9 to be rotated through the gear wheel 18.

20-to be rotated 22 and belt-23. meshes with the 26. The shaft through the pulleys 21, and A pinion 24 on the shaft 20, gear wheel 25 on'the shaft 26 carries'a gear wheel 27 on the carriage B. In this manner, the carriage is caused to beoperated.

'A shaft 29, journaled in the frame, has a lever 30 mounted thereon. A crank arm 31 is connected to the shaftv 29, and eccentrically connected to the crank-arm :31 is a rod 32 which carries a fork 33, which is received betweenthe double clutch member 6 for rethe members'upon the shaft 4, whereby the clutch member 6 will be' caused to engagefeither the clutch 13. A gear wheel shaft 13, which is the rack 28- maadna s, 1911.

A gear wheel 18- is mounted 23 connectin the B0 1 The movement or rotation of the shaft 19 causes the

shaft face

7 or 8, ac-

cording. .to the direction of-movement that the carnage is to take.

Lugs

34 and 35 are adjustably supported'in a slot'36 in the can riage. These lugs are adapted to be engaged by the lever ,30'for oscillating the shaft 29. The oscillation of theshaft 29 causes the double clutch face 6 to be reciprocated upon the shaft 4. For instance, the clutch 6 would be disengaged from the clutch face 8,

indicatedin Fig.2, and thrown into engagement with the clutch. face 7 and cause it to move in the opposite direction to that. in

which it was traveling when the clutch face 8 was inengagement with the-clutch merry her 6.

The grinding wheel C is mountedupon a carriage 37,1which. moves crosswise of the machine. '-A;-rack 38 on. th engaged by a gear wheel. 39. on a shaft which shaft is journaledi'n the frame A; A

e carriaget37 is gear ,41 on the shaft 40 meshes with a worm gear 42 on the shaft 43.

A ratchet wheel 44 is mounted on the shaft .43 and is engaged by a pawl 45 which is pivotally mounted upon. a. block 46.- A rod 47 is pivotally connected to the lever 30 and is provided with stops 48, 48, which are adapted to engage the block 46 for reciprocating it for causing the'pawl 45 to rotate the ratchet wheel 44.- The rotation of the ratchet wheel44 is caused by the reciprocation of the carriage, which reciprocation is governed by the oscillation of the lever 30. The operation ofthe lever 30 by the move ment of the carriage, causes the rod 47 to be moved, and the movement of the rod 47 moves the block 46, causing the pawl to rotate the ratchet wheel 44. This movement of the ratchet wheel rotates the shaft 43, which transmits a step by step movement to the cross feed carriage 37 through the worm gear 42, gear wheel 41, shaft 40, gear wheel.

39 and rack 38.

Mounted upon the carriage B is. a casing 49, which is capable of being fed cross-wise by means of the screw 50. A lever 51 is mounted on the shaft 52 journaled in the casing 49. Journaled on the outer end of the lever, is a wheel 53 which is adapted to engage the working shaft 2. A handle 54 is provided on the lever for placing the wheel 53 or for raising-the lever prior to the operation of the machine, so that the lever 51 will be engaged by the spring-controlled stem 55 for holding the wheel out of engagement during the setting of the shaft to be worked upon. A roller 56 is journaled on the outer end of the lever 51, which is adapted to be engagedby the'pawl 57 which is pivot-ally mounted in the casing. The other or lower end of the pawl 57 projects through. the bottom of the casing and is adapted to trip the

lovers

58 and 59.

'A rod 60 is connected to the belt 23 for shifting the belt for changing the speed of the pulleys 21 and. 22.- A spring 61 is mounted upon the rod 60, so that the rod is under spring tension, and is held under the tension by the link '62 which engages a notch 63 on the rod and holds the rod under the spring tension. The link 62 is connected to the bell crank lever 59 which is operated by the pawl57 when it is desired to change the speed of the carriage. A- link 64 is connected to the pawl 45. Connected to the link 64 is the bell crank lever 58 which is adapted to be operated by the pawl 57, for stopping the cross feed of the grinding wheel C.

When the shaft 2 has been set and the machine is ready for operation, the wheel 53 is adjusted to. the position desired,-by the screw 50, so that it can be automatically determined when theshaft has been ground down to the proper shape. After the wheel has been set, the pawl'57 is brought into engagement with the roller 56 on the lever 51, and the stem 55 is withdrawn from engagement with the lever. A spring 67 holds the pawl 57 in engagement with the roller 56. When the shaft has been ground down sufiiciently, or within a few thousandths of the required size, the speed of the carnage is automatically changed for changing the cut of the shaft from a roughing to a finishing cut. This'is accomplished by the pawl 57 coming in contact with the lever 59. As the pawl 57 comes in contact with the lever 59, the lever is tripped, operating the link 62, whereby the rod 60 is released, causing the belt 23 to be shifted upon the pul-- leys 21 and 22, whereby the speed of the carriage is reduced. The grinding of the shaft 2 causes the wheel 53 to continue to rise, and as it rises, or moves above the shafts, the pawl 57 will be caused to move outward, where it will come into engagement with the bell crank lever 58. The tripping of-this lever 58 will cause the pawl 45 to be raised out of engagement with the ratchet wheel 44, thereby stopping the cross feed of the grinding wheel G. The grinding wheel 0 and shaft 1 can continue to rotate until stopped, but the fact that the cross feed has" been stopped, the driving wheel will not produce a cutting action upon the shaft.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a grinding machine, the combination with a movable carriage, means for drivin the carriage, means for changing the spec of the carriage, means forfeedin the grinding wheel toward the carriage, o levers connectedto the speed mechanism of the carriage and cross-feed mechanism of the grinding wheel, and mechanical tripping mechanism adapted to engage the lever for changing the speed of the carriage, and then engaging the lever for stopping the cross-feed of the grinding wheel.

2. In a grinding machine, the combination with a movable carriage and grinding wheel, means for driving the carriage, means for changing-the speed of the carriage, means for feeding the grinding wheel cross-wise of the machine, levers connected to the speed mechanism of the carria e and cross feed of the grinding wheel, 0 a lever engaging the work operated upon, and means operated by the lever adapted to first engage the lever for changing the speed of the carriage and then engaging the lever for stopping the cross feed of the grinding wheel.

3. In a grinding machine, the combination with a movable carriage and grinding wheel, means for, driving the carriage, means for feeding the grinding wheel cross-wise of the machine, of a lever adapted to engage the work, a pawl on aging the lever ada 'ted to completion of the finishin out for stopping be operated by t e movement of the ever, a the cross feed of the grin ing wheel. 10 lever connected to the carriage driving In testimony whereof I afiix my signature, mechanism ada ted to be engaged by the in the resenee of two witnesses.

awl for changing the out upon the work *DWARD WILSON MITCHEL. rom a rough to a finishing cut, and a lever Witnesses: connected to the cross feed mechanism J. H. TUDOR, adapted to be engaged by the pawl upon the B. O. Lnnes'ron.