US1904649A - Milling machinery - Google Patents

Description

| F; NENNINGE IMILLING MACHINERY April 18, 1933.

4 Sheets-.Sheet 1 April 18, 1933. l.. F. NENNINGER 1,904,549

MILLING MACHINERY Filed oct. 4, 1926 4'sheets-snveet 3 fluor neg Alirill', l933 l.. NENNINGER 1,904,649

MILLING MACHINERY Filed oct. 4, 1925 l4:s-he-ts-srwet 4 05 xm@ QN y v'\ x K3 "l 4 Ik u R+ Quorum.,

Patented Apr. '18s 1933 UNITEDA STATES 7Param* OFFICE l LESTER F. NENNINGEB, QF CINCINNATI, OHIO, ASSIG'NOR TO THE CINCINNATI MILLING MACHINE COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO MILLING MACHINERY Application tiled October 4,

This invention relates to improvements in milling machinery and has particular reference to a novel and improved mechanism for controlling the work and cutter movements of member.

Another object of the invention 1s the provision of an improved mechanism for controlling'the feeding movement of the work piece at varying rates and for producing a 'quick yreturn thereof at the completion of the cutting operation. u

Additional objects include a general simplification of machine structure and controls and improvement in structural ldetails as hereinafter more specifically pointed out, but it will be understood that I may makeany modifications in the particularstructure shown and described within the scope of the appended claims, without departing from or 'exceeding the spirit of the invention.

Figure 1 is a front view of a machine em "bodying the invention.

Figure 2 is a side elevation thereof.

Figure 3 is a plan View ofthe central portion of the bed and parts carried thereby, portions of the machine being broken away.

Figure l4 isa longitudinal sectional view as on line 4-4 of Figure 3.

Figure 5 is a vertical section through the table'drive mechanism as. on the line 5--5 of, Figure 6, looking in the direction of the arrows thereon.

Figure 6 is a section on line 6-6 of Figure looking in the direction of the arrows there- Figure 7` is a section on line 7-7 of Figure 5. y

-Figure 8 is a fragmentary view of the 1920. Serial No. 139,314.

detent for the starting and stopping mechanism, and the associated portion of the joint control member.

Figure 9' is a perspective view of the trip pllnger control member and associate parts, an

Figures 10, 11- and12 are fragmentaryV views illustratingv the releasable connection between the main clutch control and the trip plunger mechanism.

Figure 13 is a fragmentary sectional view lower bracket portions 33 slidably supporting the quills 34 for the spindles 35. The spindles 35 have the customary spindle noses 36 to receive the usual cutter arbors. Intermediate the overarm and quill supporting portions the carriers are split as indicated at v37. T bolts 38 engaged in the ways 28 and provided with .nuts 39 may be tightened to simultaneously lock the carriers in vertically adjusted position upon the columns and also to contract the carriers at the slots 37 to se- A curely lock the overarms and quills in. adjusted position therein.

The spindles are driven through a suitable series of gears 40 having on their lower ends the bevel gears 42 in mesh with the pinions 43, loosely mounted on the main drive shaft 44. Individual clutches 45 keyed on drive shaft 44 may be moved to interlock with either of the pinions 43 for operatively connecting sha-ft 41 with shaft 44, it being understood that the shifting of clutch 45 to the left or right from the neutral position shown in Figure 1 will cause the spindle 35 to be driven in opposite directions ait the rate determined by gearing 40, which if desired mayinclude ch lnge gears at the upper end of shaft 41to vary said rate. Shifters 46 serve to vary the position of the clutches 45 for individual control of the right and left hand shafts 41`of Figure'l. l

Formed on the bed 25 intermediate the columns 26 and 27 'are the ways 47 for the machine table 48 which thus has a forward and back or in and out movement with respect to the spindles 35. The movement in an inward or feeding direction is imparted to the table through the medium of rack 49 on the underside of the table and pinion 50 on the upper end of shaft 51, while movement in the reverse direction is effected through the cha-in 52 riding over idlers 53 and 54 and bearing on its end the weight 55. When the pinion 50 is released from its driving connections the weight 55 will return the table rapidly to its forward position. 'To limit the further movement 4and eliminate jar of the table or other parts of the machine, use is made of cylinder 56 at the frontl of the table within which moves piston 57 actuated toward the left'by spring 58 and having an abutment 59 for engagement with the' abutment block 60 on the underside of the table as is most clearly illustrated in Figure 4. An air vent 61 is provided for the cylinder to create an air cushion' in the cylinder supplementing action of spring 58, the effective size of aperture of this vent being varied by adjustment of valve screw 62 at the front of the bed.

To securev maximum efficiency in milling or like operations, it is desirable that the table be `first advanced at a rapid rate until the work to be operated upon is substantially in engagement with the cutter and that it be subsequently given a slow and powerful" inward or feeding movement during \the time the cut is being made. To attain thisresult in the present instance, shaft 51 has on its lower end worm gear 63 driven by worm 64 on shaft 65. Keyed to this shaft is a clutch member 66 for cooperation with the clutch face 67 on the hub of gear 68 driven from pinion 69 on shaft 70, means being provided for driving shaft 70 at either a rapid or relatively slow rate of rotation as preferred.

The power for operating shaft 7 0 is derived from main shaft 44 of the machine through the gear 71 on said shaft, meshing with a combined spur and miter gear having spur portion 72 and miter or bevel portion 73. This gear is mounted concentric with shaft 70 on sleeve 74 rotatable on bushing 75 disposed intermediate the shaft and gear. This sleeve has a clutch face 6 for cooperation with one side of shiftable clutch spool 77 keyed on shaft 70. The rapid movement of the tablel is therefore effected from the main drive shaft through gears 71 and 72, sleeve 74 and spool 77 to shaft 70.

To impart the slow feeding movement to the table use is made of the gear 73 which is in constant mesh with bevel gear 78 on stub shaft 79, bearing pinion 80, driving gear 81 on shaft 82. The parts and 81 may be change ears for varying the rate of feed drive. arried by shaft 82 is a pinion 83 driving gear 84 on shaft'85. This shaft is in turn provided with a worm 86 meshing with the worm gear 87 mounted von sleeve 88 concentric with shaft 70,. This sleeve has a clutch face 89 for engagement with the second clutch face of the clutch spool 77 for coupling the sleeve with shaft 70 for actuation of the latter therefrom. It will thus be seen that by shifting of the clutch spool to the left as viewed in Figure 6, shaft 70 will be coupled as previously described for operation ata rapid rate of speed, while by shifting of the spool to the right the shaft will be coupled through the worm, worm gear and other reduction gearing just described and through gears 7 3-78*72 with the drive pinion 71 on main drive shaft 44 for operation at a slow rate of speed.

To control the shifting of clutch spool 77 use is'made of shifter yoke 90 interlocking with the spool and intermediately pivoted to the casing 91. This shifter yoke has at its opposite end the rack segment 92 meshing with the annular teeth 93 on shifter rod 94 which has a second series of annular teeth 95 engaged by the spline teeth 96 on trip plunger 97 which extends upwardly at the side of ways 47 and has the triphead 98 provided with portions 99 for engagement with the dogs 100 and 101 adjustably mounted on the side of table 48.

In operation the parts are set for rapid inward movement of the table and the table moves in until dog 100 engages the plunger head abutment 99 rocking the plunger to shift the clutch spool out` of engagement with clutch face 76 and into engagement with clutch face 89 when the table will be,con tinued inward at a feeding rate untilV the work is completed. At this point dog 101 will engage head 98 of the trip plunger and vertically shift the plunger. This vertical shifting movement serves through the annular teeth 102 on the plunger meshingwith pinion portion 103 of shifter rod 104 to rock the shifter rod. This rod is provided with the eccentric pin 105 riding in the shifter groove 106 of gear 68 and the vertical movement of the trip plunger serves to separate clutch faces 66 and 67 thus disconnecting the drive from shaft 65'when the weight 55 acts to return the table to its forward position. lIt

rocking may be effected by interengagement of dog 100 in the head of the cam on the reverse stroke shifting the parts to original fast speed position.

Similarly the rocking of shifter rod 104 is accentuated by mounting upon the rod the cam plate 109 engaged by the spring pressed actuator d'etent 110, causing a like rapid movement of this part when urged by the trip dog beyond neutral position.

It will be understood that it is quite desirable that the machine may be manually started or stopped at any desired point in its operation as well as mechanically actuated. Also, I have found it desirable to either manually or automatically stop the entire drive of the machine, that is to say, both the inward power movement of the table and also the driving of the cutters automatically and simultaneously in some instances, while in other instances I find it preferable to continue the actuation of the cutters while the table is making its return stroke. To provide for these several manual and automatic controls, use is made of the following mechanisms z Power is primarily applied to the main shaft 44 of the machine as through a drive belt 111 from a suitable source of power actuating pulley 112 which may be coupled with shaft 44 by clutch 113. This clutch is operated by the clutch control arm 114 and the clutch shifting rod 115, having the operating handle 116. Upward swinging of handle 116 rocks rod 115 to move the clutch into operative engagement, whereby shaft 44 is driven and thus the vertical driveshafts 41 for the spindles. The rod 115 is formed with a tongue 117 engageable in groove118 of the motion transmitting spindle 119 which ti spindle has a second groove 120 engaging the tongue 121 of spindle 122, having the handle 123. S indle 122 also has a pinion portion 124 mesliing with the annular rack 125 of the trip plunger rod 97. As a result with the several -parts in the interengaged relation shown in Figure 9 rocking movement of rod 115 will be transmitted throughspindles 119 and 122 to plunger 97, so that when the main clutch of the machine is thrown in and out, the table control clutch will be correspond- -in ly shifted. Also, when the dogs automatil actuate the trip plunger the entire drive of tlie machine will be automatically stopped.

To take care of those instances when it is desired to stop merely the drive of the table without stopping the cutter movement or where it is desired to shutoff the power of the machine without releasing the table clutch so that the table will remain in the position to which it has been fed or advanced, the rod 115 and spindle 12:2 are disconnected one from the other. This disconnection is facilitated by forming spindle 119 with a knurled operating portion 126 and with a Hat 127 adjacent groove 117. The effect of this will be best understood by reference' to Figures 10, 11 and 12, from which it will be seen that on rotation of member 119 the flat 127 will come into the path of movement of tongue 117 on rod 115 with the result that this rod may be rocked back and forth without aecting the trip plunger or parts controlled thereby and similarly the member 119 may be reciprocated without engaging tongue 117 Also, on account of the projection of the tongue into the flat 127, the parts can only be reengaged for joint actuation when both have been independently shifted either into driving or neutral positions.

From the foregoing connection with the accompanying drawings the construction and control of the present improved milling machine should be readily understood and it will be noted that there has been provided a simplified structure in which the table may be shifted in the direction of the cutters at a quick traverse or at a feeding rate and the change from one rate to the other automatically eifected as by dogs on the table, and that at completion of the feed stroke the power drive may be automatically disconnected and a rapidindependent return movement given the table as throughl a weight mechanism and a yielding bulfer for taking up the shock of the table return.

It will further be noted that the machine may be used as a complete automatic single cycle operation in which the cycle may be manually started and at its completion the entire drive both of the cutters and of the table automatically checked or the 4cutter and table drive controls disassociated and ren. dered capable of independent manual actuaon. v

It will further be noted that a specifically novel drive mechanism has been provlded for attaining the various'desired rates of movement of the table.

I claim 1. In a machine tool, the combination with a support, of a table movableon the support,

power means for imparting movement to the.

table, including a main drive shaft, a transmission eXtending from the drive shaft to the table, a supplemental branch transmisslon, a

description taken in clutch for selectively coupling the said transmissions with the table to actuate the latter,A

a common clutch mechanism for disconnecting all power actuation of the table, and additional gravity actuated mechanism for returningthe tabl-e when said last mentioned clutch is in inoperative position.

2. In a machine tool, the combination with a support and a table movable on the support, of control mechanism for the table, 1ncluding a driveshaft, a gear member continuously operated thereby, a branch transmission continuously driven from said gear member, a final transmission coupled with the table for actuation of the latter, a clutch iso for selectively coupling the final transmission with the driven gear for high speed actuation of the table or with the branch transmission for slow speed actuation of the table, a second clutch in the final transmission and an axially shiftable trip plunger for moving said second clutch into operative position to couple the drive as determined by the first clutch with the table or inoperative position to disconnect the drive from the table.

3. In a machine tool, the combination with a support and a table movable on the su port, of control mechanism for the table, inc uding a drive shaft, a gear member continuously operated thereby,'a branch transmission continuously driven from said gear member, a final transmission coupled with the table for actuation of the latter, .a clutch for selectively coupling the final transmission i with the driven gear for high speed actuation of the table or with the branch transmission for slow speed actuation of the table, a second clutch in the iinal transmission, means for moving said second clutch into operative position to couple the drive with the table or inoperative position to disconnect the drive from the table, and additional means for automatically returning the table when the last mentioned clutch is in disengaged position.

4. ln a machine tool, the combination with a support and a table movable on the support, of control mechanism for the table, including a drive shaft, a gear member continuously operated thereby, a branch transmission continuously driven from said gear member, a final transmission coupled with the table for actuation of. the latter, a clutch for selectively coupling the final transmission with the driven gear for high speed actuation of the table, a second clutch in the linal transmission, means for moving said second clutch into operative position to couple the drive with the table or inoperative position to disconnect the drive from the table, and additional means for automatically returning the table when the last mentioned clutch is in disengaged position, said return means including a weight and operative connections between the weight and table.

5. In a machine tool, the combination with a support and a table movable on the support, of control mechanism for the table, including a drive shaft, a gear member continuously operated thereby, a branch transmission continuously driven rom said gear member, a final transmission coupled with the table for actuation of the latter, aA clutch for selectively coupling the nal transmission with the driven gear for high speed actuation of the table, a second clutch in the final transmission, means for moving said second clutch into operative position to couple the drive with the table or inoperative position to disconnect the drive from the table, additional means for automatically returning the table when the last mentioned clutch is in disengaged position, said return means including a Weig t and operative connections between the Weight and table, and means on the support for absorbing the shock of return of the table.

6. In a machine tool, the combination with a support and a table movable on the support, of control mechanism for the table, including a drive shaft, a vgear member continuously operated thereby, a branch transmission continuously driven from said gear member, a final transmission coupled with thetable for actuation of the latter, a clutch for selectively coupling the final transmission with the driven gear for high speed actuation of the table, a second clutch in the inal transmission, means for moving said second clutch into operative position to couple the drive with the table or inoperative position to disconnect the drive from the table, additional means for automatically returning the tab-le when the last mentioned clutch is in disengaged position, said return means including` a weight and operative connections between the weight and table, and means on the support for absorbing the shock of return of the table, said means including a yieldable air cushioned piston and means .for varying the rate of escape of the cushionmg air.

7. A machine tool of the character described, including a support and a table movable on the support, power means for moving the table on the support, a cutter spindle actuated by the power means independently of the table, a clutch for varying the rate of propulsion of the table, a second clutch for controlling the coupling of the propelling means with the table, a control plunger axially shiftable to operate one of said clutches and oscillatable to operate the other of said clutches, dogs on the table in position to engage the trip plunger and impart the desired axial shiftin and rotary movements thereto at predetermlned points in the reciprocation of the table, a main control clutch for coupling the power means to the table and spindle, and means for selectively coupling the main control clutch with said plunger for actuation o the clutch upon movement of the plunger in one of its directions of movement.

8. A. machine tool of the character described, including a support and a table movable on the support, power means for moving the table on the support, a clutch for varying the rate of propulsion of the table, a second clutch for controlling the coupling of the propelling means with the table, a control plunger axially shiftable to operate one of said clutches and oscillatable to operate the other of said clutches,ldogs on the table in position to engage the trip plunger and im- Leo-1,649

part the desired axial shifting and rotary movements thereto at predetermined points in the reciprocation of the table, a control clutch for the entire actuation of the machine,'and means for coupling the control clutch with said plunger for actuation of the clutch upon movement of the plunger, said means including a shifter rod for the main power clutch having a spline portion and a plunger engaging member having a second spline portion and a connector having clutches interlocked with the splines in one position and having a fiat communicating with one of the clutches to permit of free movement of the adjacent spline when the couplin member isrotated to bring the fiat in the p ane of the adjacent spline.

9. A milling machine including a supporting bed, a table movable on the bed, a column rising from the bed, a spindle head adjustably mounted on the column, a main shaft 1n the bed,-means for applying power to the shaft, a clutch controlling the actuation thereof, a shaft for transmitting power to the spindle head` gearing on the main and spindle head shafts, a reversing. clutch controlling the operative association of said shafts, main and supplemental transmissions carried by the bed adjacent the table, drive connections to said transmissions, means for shifting the table on the bed, a clutch controlling the operative association of the main or branch transmissions with the table driving means to determine the rate of operation thereof, and a second clutch for disconnecting all power actuation from the table shifting means, means for automatically operating the rate shifting clutch, and means for manually or automatically operating the power application controlling clutch.

l0. An operating mechanism for a machine tool table, including the combination with a support and a table shiftable thereon,-

a main drive shaft carried by the support, a final shaft coupled with `the table for shiftin@ the "latter, and a main transmission between said drive shaft and final shaft in- .intermediate shaft clutch,

cluding a drive pinion on the main shaft, a combined spur and miter geardriven therefrom through the spur portion, an intermediate shaft coupled with the final shaft and having a clutch member keyed thereto, a clutch portion on the combined spur and miter gear adapted to engage the clutch on the intermediate shaft to directly actuate the latter, abranch transmission operable by the miter portion of the gear, including a series of spur and worm reduction members, the final member of the branch transmission being disposed concentric with the intermediate shaft but freely rotatable with respect thereto, said member having a clutch portion for selective engagement by the aforementioned whereby said shaft may` be coupled with the branch transmission for slow actuation thereby when it is disconnected from the direct drive 11. An operating mechanism for a machine tool table, including the combination with a support and a table shiftable thereon, a main driveshaft carried by the support, a final shaft coupled with the table for shifting the latter, and a main transmission between said drive shaft and final shaft including a drive pinion on the main shaft, a combined spur and miter gear driven therefrom through the spur portion, an intermediate shaft coupled with the final shaft and having .a clutch member keyed thereto, a clutch portion on the combined spur and miter gear adapted to engage the clutch on the intermediate shaft to directly actuate the latter, a branch transmission operable by the miter portion of the gear, including a series of spur and worm reduction members, the final member of the branch transmission being disposed concentric with the intermediate shaft but freely rotatable with respect thereto, said member having a clutch portion for selective engagement by the aforementioned intermediate shaft clutch, whereby said shaft may be coupled with the branch transmission for slow actuation thereby when it is disconnected from the direct-drive, a shift lever coupled with said clutch, an oscillatable plunger associated with said shift lever Jfor actuation thereof, and control means` on the table adapted to engage the plunger and shift the clutch on reciprocation of the table. y 12. An operating mechanism for a machine tool table, including the combination with a' support and a table shiftable thereon,

a main drive shaft carried by the support, a I

' cluding a drive pinion on the main shaft, a

combined spur and miter gear driven therefrom through the spur portion, an intermediate shaft coupled with the final shaft and having a clutch member keyed thereto, a clutch portion on the combined spur and miter gear adapted to engage the clutch on the intermediate shaft to directly actuate the latter, a branch transmission operable by the miter portion of the gear, including a series of spur and worm reduction members, the final member of the branch transmission being disposed concentric with the intermediate shaft, but freely rotatable with respect thereto, said member having a" clutch portion for selective engagement by the aforeshift the clutch on reciprocation of the table, a second clutch intermediate the final shaft and the intermediate shaft for operatively connecting and disconnecting said parts, a

shifter for said clutch and connections between the shifter and control plunger for moving the clutch into and out of operative position as the plunger is axially moved.

13. An operating mechanism for a machine tool table, including the combination with a support and a table shiftable thereon, a main drive shaft carried by the support, a final shaft coupled with the table for shifting the latter, and a main transmission between said drive shaft and final shaft including a drive pinion on the main shaft, a combined spur and miter gear driven therefrom through the spur portion, an intermediate shaft coupled with the final shaft and having a clutch member keyed thereto, a clutch portion on the combined spur and mitergear adapted to engage the clutch on the intermediate shaft to directly actuate the latter, a branch transmission operable by the miter portion of the gear, including a series of spur and worm reduction members, the final member of the branch transmission being disposed concentric with the intermediate shaft, but freely rotatable witht.

respect thereto, said member having a clutch portion for selective engagement by the aforementioned intermediate shaft clutch, whereby said shaft may be coupled with the branch transmission for slow4 actuation thereby when it is disconnected from the direct drive, a shift lever coupled with said clutch, an oscillatable plunger associated with sa`id shift lever for actuation thereof",` control means on the table adapted to engage the plunger and shift the clutch on reciprocation of the table, a second clutch intermediate the final shaft and the intermediate shaft for operatively connecting and disconnecting said parts, a shifter for said clutch, connections between the shifter and control plunger for moving the clutch into and out of operative position as the plunger is axially moved, and additional control means on the table for axially shifting the plunger as the table is reciprocated.

14. An operating mechanism for a machine tool table, including the combination with a support and a t-able shiftable thereon, a main drive shaft carried by the support, a final shaft coupled with the table for shiftingy the latter, and a main transmission between said drive shaft and final shaft including a drive pinion on the main shaft, a combined spur and miter gear driven therefrom through the spur portion,van intermediate shaft coupled with the final shaft and having a clutch member keyed thereto, a clutch portion on the combined spur and miter gear adapted to engage the clutch on the intermediate shaft to directly actuate the latter, a branch transmission operable by the mitter portion of the ear, including a series of spur and worm re uction members, the final member of the branch transmission being dis osed concentric with the intermediate sha t, but freely rotatable with respect thereto, said member having a clutch portion for selective engagement .ty the aforementioned intermediate shaft clutch, whereby said shaft may be coupled with the branch transmission for slow actuation thereby when it is disconnected from the direct drive, a shift lever coupled with said clutch, an oscillatable plunger associated with said shift` lever for actuation thereof, control means on the table adapted to engage the plunger and shift the clutch on rec'iprocation of the table, a second clutch intermediate the final shaft and the intermediate shaft for operatively connecting and disconnecting said parts, a shifter for said clutch, lconnections between the shifter and control plunger for moving the clutch into and out of operative position as the plunger is axially moved, additional control means on the table for axially shifting the plunger as the table is reciprocated, and additional manual means for axiall shifting the plunger to operate the actuation control clutch.

15. An operating mechanism for a machine tool table, including the combination with a support and a table shiftable thereon, a main drive shaft carried by the support, a final shaft coupled with the table for shifting the latter, and a main transmission between said drive Shaft and final shaft including a drive pinion on the main shaft, a combined spur and miter gear driven therefrom through the spur portion, an intermediate shaft coupled with the final shaft and having a clutch member keyed thereto, a clutch portion on the combined spur and miter gear adapted to engage the clutch on the intermediate shaft to directly actuate the latter, a branch transmission operable by the miter portion of the gear, including a series of spur and worm reduction members, the final member of the branch transmission being disposed concentric with the intermediate shaft, but freely rotatable with respect thereto, said member having a clutch portion for selective enga ement by the aforementioned int-ermediate saft clutch, whereby said shaft may be coupled with the branch transmission for slow actuation thereby when it is disconnected from the direct drive, a shift lever coupled with said clutch, an oscillatable plunger associated with said shift lever for actuation thereof, control means on the table adapted to engage-the plunger and shift the clutch on reciprocation of the table, a second clutch intermediate the final shaft and the intermediate shaft for operatively connecting and disconnecting said arts, a shifter for said clutch, connections etween the shifter and control plunger for moving the clutch into and out of operative position as the plunger is axially moved, additional control means on the table for axially shifting the plunger as the table is reciprocated, additional manual means for axially shifting the plunger to operate the actuation control clutch, a main control clutch for the entire machine and a detachable connection between' the manual plunger shifting means and said control clutch for selectively simultaneously operating both of said clutches.

16. An operating mechanism fora machine t tool table, including the combination with a support and a table shiftable thereon, a main drive shaft carried by the support a final shaft coupled with the table for shifting the latter, and a main transmission between said drive shaft and final shaft including a drive pinion on the main shaft, a combined spur and miter gear driven therefrom through the spur portion, an intermediate shaft coupled with the final shaft and having a clutch member keyed thereto, a clutch portion on the combined spur and miter gear adapted to engage the clutch on the intermediate shaft to directly actuate the latter, a branch transmission operable by the miter portion of the gear, including a series of spur and worm reduction members, the final member of the branch transmission being disposed concentric with the intermediate shaft, but freely rotatable with respect thereto, said member having a clutch portion for selective engagement by the aforementioned intermediate shaft clutch, whereby said shaft may be coupled with the branch transmission for slow actuation thereby when it is disconnected from the direct drive, a shift lever coupled with said clutch, an oscillatable plunger associ ated with said shift lever for actuation thereof, control means on the table adapted to engage the plunger and shift the clutch on reciprocation of the table', a second clutch intermediate the final shaft and the intermediate shaft for operatively connecting andv disconnecting said parts, a shifter for said clutch, connections between the shifter and control plunger for moving the clutch into and out of operative position as the plunger is axially moved, additional control means on the table for axially shifting the plunger as the table is reci rocated, additional manual means for axially shifting the plunger to operate the actuation control clutch, a main control clutch for the entire machine, a de-l tachable connection between thel manual plunger shifting means and said. control clutch for selectively simultaneously operating both of said clutches, and additional manually operable means for independently actuating the main clutch when disconnected from the manual plunger shifting mechamsm. i

17. A single cycle machine tool table control, including the combination with a support and a table movable thereon, of power means for shifting the table in one direction, automatic controls therefor to change the movement of the table from quick traverse to feed, means to entirely disconnect the power actuation from the table, means to automatically return the table when the' power actuation is disconnected therefrom, and means for shifting the automatic control on the return stroke from feed to quick traverse, whereby the machine is set for quick traverse inward movement when the actuating power is again coupled with the table.

18. In a milling machine the combination with a support and a table reciprocably mounted on the support for feed and return movements, of power means for actuating the table in one direction at both rapid trave-rse and feeding speeds, means for automatically changing the rate of movement of the table from rapid traverse to feed on its inward stroke, means for limiting the inward stroke by disconnectingvthe power actuation from the table, supplemental means for automatically returning the table when the power actuation is disconnected therefrom, and means for automatically shiftingl the inoperative power mechanism from feed to quick traverse on the return movement of the table, whereby the table will be inwardly moved at a rapid rate when power is again applied thereto. l

19. A machine tool of the character described including a supporting bed, a column rising therefrom, a spindle head vertically .adjustable on the column, said head having overarm and spindle receiving chambers formed therein, and a split web portion intermediate the chambers, T bolts engaged in the column and passing through the web portion, and nuts engaged on the free ends of the T bolts, whereby tightening of the nuts will spring the split web together to clamp the overarm and spindle in position and will also clamp the head in adjusted position on the column.

20. In a machine tool the combination with a support of a table movable on the support, power means for imparting movementto the table including a main drive shaft terminating ina first clutchelement, a supplement-al branch transmission continuously actuated by the drive shaft and-terminating in a second clutch element, a final transmission extending to the table, a first clutch member for selectively coupling` the final transmission with either of said clutch elements for actuation of the table at different rates, a second clutch member in the final transmission for disconnecting all power actuation from the table, trip controlled means'for actuating the clutches including an oscillatable and rotatable trip plunger, means coupling the plunger to the. first'clutch member for shifting thereof upon rotation of the plunger and additional means coupling the plunger to said second clutch member for shifting thereof upon axial movement of the plunger'.

2l. In a milling machine the combination of a horizontal reciprocable work table, a supporting structure therefor, a rotatable tool spindle at a level above said table and axially transverse to the path of table movement, said structure providing a spindle supporting portion uprising adjacent a longitudinal edge of said table and at one side of a vertical plane passing through said edge, and means for effecting reciprocation of the work table and rotation of the spindle including a common drive shaft for supplying power to'said parts, an element for applying power to the shaft, a controlling clutch for determining the operative connection or disconnection of power to the shaft, a final drive transmission for reciprocation of the table, a second clutch determining the operative c'onnection or disconnection of this drive transmission with respect to the common drive shaft, individual actuating means for the respective clutches, including individually operable actuators, and means for selectively connecting or disconnecting the respective actuating means one with the other whereby the operation of an individual actuator dependent on the adjustment of said last named means will be effective for joint operation of both clutches or independent operation of but one thereof. j

22. In the milling machine the combination of a horizontal reciprocable work table, a supporting structure therefor, a rotatable tool spindle at a level above said table and axially transverse to the path of table movement, said structure providing a spindle supporting portion uprising adjacent a longitudinal edge of said table and at one side of a vertical plane passing through said edge, and means for effecting reciprocation of the work table and rotation of the spindle including a common drive shaft for supplying power to said parts, an element for applying power to the shaft, a controlling clutch for determining the operative connection or disconnection of power to the shaft, a final drive transmission for reciprocation of the table, a second clutch determining the operative connection or disconnection of this drive transmission with respect to the common drive shaft, individual actuating means for the respective clutches including individually operable actuators, means for selectively connecting or disconnecting tl'1erespcctive actuating means one with the other whereby the operation of an individual actuator dependent on the adjustment of said last named means will be effective. for joint operation of both clutches or independent operation of but one thereof, and means including a trip controlled mechanism for automatically moving the control clutches into inoperative position.

23. In a milling machine the combination with a support and a table movable on the support, of control mechanism for the table including a drive shaft, a gear member continuously operated thereby, a second transmission driven from said shaft, a -final transmission coupled with the table for actuation of the latter, a first clutch for selectively coupling the final transmission with the driven gear for high speed actuation of the table or with the second transmission for slow speed actuation of the table, a second clutch in the final transmission in serial relation with the first, and means for moving said second clutch into operative position to couple with the table the drive as determined by the first clutch or to move it into inoperative position to disconnect the drive from the table, said means including an axially movable trip plunger.

24. 1n a hed type milling machine the combination with a bed, of a column rising therefrom at the side thereof, a table supported on the bed for translation with respect to the column, and a spindle carried by the column for support and actuation of a cutter, said spindle being mounled for rotative movement and for reciprocating movement in a direct-ion toward and from the table, and means for power actuation of the machine including a primary driven member, a transmission extending from said member to the spindle for effecting power actuation thereof in one of its movements, additional transmission means extending from said member and operable thereby at a predetermined relative speed as respects the speed of actuation of the spindle transmission by the member, said additional transmission means including an intermediate shaft, a pair of power transmi ting elements mounted on the shaft for uni-directional rotation at appreciably different rates of speed whereby one of said elements constitutes a high speed terminal rotating at a constant rate and the other a slowly ro' ating terminal operable atselectively variable rates, power transmitting connections coupling said terminals with the primary member for actuation thereby, the transmission for the slow rates including in the order recited means for varying said rate and a worm and a worm wheel driven by said means, a. final table drive transmission including in the order recited a clutch element intermediate the pair of terminal elements and selectively engagable therewith to effect actuation of the table drive transmission at a feed or a rapid traverse rate and a second table and coupled with the clutch for actuation thereof, and dog means on the table engageable with the plunger to actuate the plunger and thus the clutch.

25. A milling machine includin a hollow bed or support and acolumn mem er rising thereabove, and providing guideways for vertical adjustment of a spindle carrier thereon, a spindle rotatably supported by the carrier, a table translatably supported by the bed, and power means for actuation o f said spindle and said table including a power shaft journaled in the bed and extending into the hollow interior thereof, a table transmission means operable by the power shaft including a high speed rapid traverse clutch element driven at 'a constant rate by the power shaft, and a gear element similarly driven by the power shaft, a feed clutch element co-axial with the rapid traverse clutch element, and a feed transmission intervening the gear and clutch and including in the order recited a irst and a second parallel shaft disposed within the hollow interior of the bed and having terminal ortions bearing pick 0H gears whereby tlie rate transmitted from the first to the second of said shafts may be varied as desired, a worm `driven by the second of the parallel shafts,

and a worm Wheel driven by the worm for transmitting power to the feed clutch element, a transmission for eiecting movement of the table, and a selector for said table transmission mounted in intervening relation as respects the feed and rapid traverse elements adapted to be selectively engaged therewith for determination of rate of movement of the table, the drive connections between the first mentioned shaft and the feed and rapid traverse clutch elements effecting uni-directional rotation of both of said elements whereby -constant direction-of table movement at varying rates will be effected by operative engagement of the selector there- With.

' In testimony whereof I aix my signature.

' LESTER F. NENNINGER.

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