US1351970A - Feeding mechanism for metal-working machinery - Google Patents

Description

A. M. SOSA, A. E. ROBINSON AND H. W. SCHATZ.

FEEDING MECHANISM FOR METAL WORKING MACHINERY.

APPLICATION FILED FEB. I7, I9I9.

3 SHEETS-SHEET I.

' Patented Sept. 7, 1920.

A. M. SOSA,,A. E. ROBINSON AND H. W. SCHATZ.

FEEDING MECHANISM FOR METAL WORKING MACHINERY.

APPLICATION FILED FEB. 17. 1919.

Patented Sept. 7, 1920.

3 SHEETS-SHEET 2.

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A. M. SOSA, A. E. ROBINSON AND H. W. SCHATZ. FEEDING MECHANISM FOR METAL WORKING MACHINERY.

APPLICATION HLED FEB. I7 I919.

Patented Sept.- 7, 1920.

3 SHEETS-SHEET 3.

M w .0 M k g 1 1 r 1 we I 3 u vww w w mlua 7. M IW IN E 92m, :7 Z A I. M n Z r w w gm xw gw W H J GUM f 341 m J fi m s l wd 7 6 AM 3 i M Wu 4 J z a r u\\ l7; (WI. 2 7 w? \\\\\& l\ \\\\\b fi5 E 7 wua gfimw a Q gm y E W m z V/H/IMV. W IMV/ M 9n 1 m z sis-H 5/ J zvvwaww I..- wu Wm fi f u it M 1 1 7 1 6 nun Z I UNETED S'lA'lES AUGUSTUS M. SOSA AND ALBERT E. RCBINSGN, CF CI SCI-IATZ, OF NORWOOD, OHIO, ASSIGNQRC TO AMERICAN TOOL CORPORATION 03? 612.10.

0F CINCINNATI, OHIO, A

PATENT OFFiCE.

FEEDING MECHANISM Z 'GB IF ZAL-YVOPLKING MACHINERY.

Original application filed October 23, 1917, Serial No. 198,934.

To all whom it may concern Be it known that we, AUoUs'rUs M. Sosa, ALBERT E. ROBINSON, and HERMAN NV. SOI-IATZ, citizens of the United States, the said AUoUs'rUs M. Sosa and ALBERT E. RoBINsoN residing at Cincinnati, in the county of Hamilton and State of Chic, and the said HERMAN W. SCHATZ residing at Norwood, in the county of Hamilton and State of Ohio, have jointly invented certain new and useful Improvements in Feeding Mechanism for hflletal-livorking hilachinery, of which the following is a specification.

Our invention relates to feeding means for axially feeding 'a tool-spindle in metal working machinery, especially to means for automatically controlling the limits of feeding movements of the tool-spindle. We have exemplified our invention as applied in a drilling machine embodying a rotatable axially movable drill-spindle.

It is the object of our invention to provide novel means for controlling the extents of axial or feeding movements of the toolspindle to predetermined depths, and for repeating the extents of predetermined axial or feeding movements of the tool-spindle; and, further, to provide novel means for automatically interrupting the transmission of power in order to stop the feeding movement of the tool-spindle when at the limit of its path of movement.

The present application is a division of an application for patent on improvements in feeding mechanism for metal working machinery, heretofore filed. by us October 23, 1911', and given Serial H 0,198,034.

The invention will further readily understood from the following description and claims, and from the drawings, in which latter:

Figure 1 is a side elevation of a portion of a metal drilling machine embodying our invention.

Fig. 2 is a front elevation of a drill-head, exemplifying our invention, shown in connection with a drill-arm, the latter broken away, and the front of the casing of the drill-head removed for exposure of the interior of the casing.

Fig. 3 is an axial section, taken on the line 3 of Fig. 2, illustrating the means Specification of Letters Patent.

in section in the relation of the partly Patented Sept. 7, 1920.

for adju'stahly controlling the extents of axial movements of the tool-spindle.

Fig. d is a plan view of the same, partly broken away.

Fi 5 is a plan section of the same, taken in the plane of the line 5-5 of Fig. 3.

Fig. 6 is a cross-section of the same, taken inthe plane of the line 6-6 of Fig. 3.

Fig. 7 is adetail in cross-section, taken in the plane of the line 7-7 of Fig. 3.

Fig. 8 is a rear elevation of the "controlling means for controlling the extent of axial movement of'the tool-spindle, partly plane of the line 88 of Fig. i, and illustrating the dial set at Zero.

Fig. 9 is a similar view, illustrating the parts with the dial set for the limit of feeding movement of one of the divisions of feed.

Fig. 10 is a similar view, with the dial set at a position for the beginning of the sec ond division of feeding movement of the tool-spindle. I

F ig. 11 is a similar view, with the dial set for the limit of the second division of feeding movement of the tool-spindle.

ig. 12 is a similar view, showing the relation of the parts, with the dial at the position of the tripping moment between the divisions of feed.

Fig. 13 is an enlarged detail of the clutchcontrol for the face-plate and of the clamping means for the index-ring, taken in section on the line 3-3 of Fig. 2.

Fig. 1-1 is a plan section, illustrating the clutch operating means of the feeding mechanism, taken in the plane of the line 14-1l ofFig. 15. v

15 is a vertical section of the same. taken in the plane of the line 1515 of Fig. 14.

Fig. 16 is a cross-sectional detail of the same, to zen on the line 1616 of Fig. 15; and,

Fig. 1'? is a detail of the clutch mechanism of the feed-shaft, taken in axial section on the line 17-17 of Fig. 2.

The present exemplification of our invention is shown as applied to a metal drilling machine, so much of a metal drilling machine being shown as is necessary to illustrate our 1nvent1on.

A tool-arm 31 has a tool-head 32 laterally NCINNATI, AND I'LERIEAN VI. WGRKS. COMPANY,

Divided and this application filed February Serial l'k'o. 277,587.

gear 4a selectively in opposite directionsf These means may include a shaft 38, extending lengthwise of the tool-arm, operated in suitable manner from the column of the machine. The gear 4% is fast on a bushing a5 journaled in a bearing 46 in the casing 47 of the tool-head. The bushing has splineconnection as with the tool-spindle for rotating the latter with the gear, regardless of the elevation or axial movements of the spindle.

A sleeve 51 surrounds the spindle and moves axially in a bearing52 of the casing. The spindlerotates in the sleeve, and the sleeve is held non-rotatingly in the bearing, in usual manner, end-thrust bearings 53, at, being between the sleeve and spindle. The sleeve is provided with a rack 55 with which apinion 56 engages for feeding the spindle.

(See Figs. 2 and 3). The pinion is fast on a.

shaft 57, journaled in a bearing 58 in the tool-slide, and having a bushing 59 received thereabout, with which it has rotative connection, as by a key 60. The bushing extends from a face-plate 61. A worm-wheel 64: is provided with a hub 65, serving as a bushing, in which the bushing 59 is journaled, the hub 65 in turn being journaled in a bearing 66 in the tool-slide.

The face-plate has arms 67 pivoted thereto at 68, for quick positioning of the spindle axially. The arms are articulated at 69 with an axially movable stub-shaft 7O having a cam-key 71 thereon, arranged to engage a lever 72 for actuating a friction-band 73 of a friction-clutch of any usual construetion for fixing the worm-wheel 6a and faceplate 61 together, when it is desired to feed the spindle by means of the worm-wheel. (See Figs. 2, 3, 7 and 13). The friction band 73 is moved radially by operation of any one of the operating levers 67 outwardly for engaging the clutch, any one of said arms being movable inwardly for disengaging the clutch to manually move the drill-spindle axially, the clutch being operated by any one of said arms which may be within most convenient reach of the operator, in the same direction for producing determined by adjustments in the speedvarying device, to a shaft 86, to which the gear is fixed. The adjustments in the speed varying device to transmitthe va rious speeds are made by a hand-wheel 91. An index-plate 92 rotates with the handwheel, the graduations of the index-plate cooperating with a pointer 93, to indicate the adjustment made in the speed-varying device.

The nests of gears are driven by a gear 95 fast with the gear as, the latter being fixed to the bushing 4:5, so as to rotate therewith and with the spindle. The gear 95 meshes with a gear 96' which is the initial gear of the speed-varying device; The speed-varying device exemplified is more fully shown and described and is claimed in our aforesaid application, of which this application is a division.

The shaft 86 is journaled in a bearing 97 in the casing, being held endwise in said bearing by means of collars 98, 99, fixed to said shaft. The shaft 86 is hereinafter termed the feed-shaft.

The shaft 86 is arranged to operate a worm 118, which meshes with the wormwheel'64. The worm is also arranged to be operated by manual means, instanced as accomplished by means of a handwheel 119 fixed to a shaft 120, journaled in a bearing 121 of the casing, the shaft being held lengthwise in said bearing between said hand-wheel and a collar 122 fixed to said shaft. The lower end of the shaft 86 is journaled in a bore 123 in the worm. (See Figs. 2 and 17). The shaft 36 is held lengthwise in the bearing 97.

If it is desired to operate the worm by hand, the shaft 86 isdisconnected from the worm 118. This is accomplished by means of a clutch 126, shown as a tooth-clutch, the teeth being respectively on the worm and on a collar 127, having spline-connection 123 with the shaft 86. A fork .129 is received in an annular groove 130 in said coliar, and is fixed to a rock-shaft 131 journaled in a bearing 132 of the casing, and having an operating arm 133 secured thereto.

It is often desirable to cause repeated axial feeding movements of the tool-spindle to given extents, for instance when tapping threads, or boring holes, the extents of these axial feeding movements sometimes varying greatly. These axial feeds are accomplished in the present exemplification by means of the worm 118 and worm-wheel 64. The wornnwheel acts on the pinion 56 for rotating the same anc feeding the spindle axially. it may be instanced that a single revolution of the pinion will feed the tool-spindle approximately six inches.

It often happens that a greater axial feed than is accomplished by an approximately single rotation of the pinion, is desired. Means are provided in the present exemplification for causing stoppage of the axial feed at any point during a single rotation of the worm-wheel, or pinion, or during a plurality of said rotations. The stoppage of the feed, in the present exemplification, is accomplished by disengagement of the clutch 126.

' F or accomplishing these purposes, we provide the index-plate with a plurality of indexes 137, 138, instanced as on an indexring 139 adjustable with relation to the pinion and index-plate. (See Figs. 2, 8, 4 and 13.) The ring in the present instance is rotatable on a journal-face 140 of the body of the index-plate, and is arranged to be clamped in adjusted radial positions thereon by means of a clamp, which comprises a stem 142 axially movable in a bearing 143 of the body of the index-plate, and having a shoe 144 thereon, the clamping face of the shoe coacting with an annular inclined face 145 at the rear of the index-ring, which latter is clamped against an annular flange 146 on the-body of the index-plate. The outer end of the stem is screw-threaded, for having-threaded engagement made therewith by a'handle 147. A thimble 148 surrounds said stem, a sprin 149 being in the bore of said thimble about said stem, for retaining resilient contact between the clamp and the index-ring when the clamp is unclamped.

The rear face of the index-ring is pro vided with a knock-off shoe 151 and with a tripper-pin 152, the tripper-pin being instanced as projecting rearwardly farther than the knock-off shoe. Figs. 3, 4, 5, and 8 to 12 inclusive.)

A sleeve 153 has axial movement in a bearing 154 of the tool-head, and has a rack thereon, which engages a segment-rack 156, on a segment-arm 157, secured to the rock-shaft 131. This rock-shaft is the shaft which has the operating arm 133 and the fork 129 thereon, the fork engaging the clutch-collar 127 of the clutch 126, for en- 'a 'in or disen a in the clutch. The se 2: c b b o t a ment-arm is provided. with a pm 161 fixed therein, the pin being provided with an apex 162 formed by oppositely sloping faces. A pin 16 3 is axially movable in a bore 164 in the tool-head and is moved toward the pin 161 by means of a spring 165. (See Figs. 3 and 14.) The pin 163 is provided with an apex 166 formed by oppositely sloping faces,

the apexes 162 and 166 coacting with each other and their opposed sloping faces, for causing quick completion of the engagement or disengagement of the clutch when the apex 162 has passed the apex 166.

When the segment-arm has been moved sufficiently to cause the opposed sloping faces on the pins to relatively slide, so as to bring the apexes of the respective pins into line, a slight further movement of the segment-arm will cause coa'ction of the opposite faces of said apexes and a quick rocking movement of the segment-arm in its moving direction for either engaging or releasing the clutch 126 with ,a quick movement.

The sleeve 153 has an axially movable and roekable shank 169 therein. This shank is arovided with a gage-finger 170, which is provided with an index-mark or marks, a plurality of the index-marks being provided when a plurality of the indexes on the indexring are employed. Thus the finger is pro vided with an index-mark 171, which coacts with the index 137, and with an index-mark 172, which coacts with the index 138. It also has a handle 173 thereon for moving the shank. The shank is journaled in a bearing 174 of the casing and in the bore 175 of sleeve 153. It has a collar 176 thereon, which is fixed thereto, as by a pin 177, the collar be ing provided with a shoe 178, eccentric on the collar. The shoe 178 is shown as having an outer curved face upon which one of the inclined faces of the shoe 151 is arranged to ride, the parts being so arranged that when the apex of the shoe 151 coacts with the outermost point on the shoe 178, the apex 162 will register with the apex 166, so as to cause the apex 162 to pass across the apex 166 at the moment of correlation between the apexes of the shoes 151, 178, whereby the clutch 126 is instantly disengaged, for stopping the rotation of the feeding means for the tool-spindle.

In the present exemplification, the outer index is caused to index during a single revolution of the pinion 56, this outer index being instanced as indexing depths of feed of the tool-spindle from zero to six inches. Throughout this range of feeds, rotary movement of t .e shank 169 is not required. in fact the shank mightbe dispensed with and the shoe 178 fixed directly to the part carrying the segmentracl' 155.

If it is desired to repeat axial movement of the tool-spindle of a given extent depth, the toolspindle is in practice fee axially to a given point, exemplified, for instance, by the point of engagement of the point of the tool 180 with the surface of the work, instanced at 181, the axial feeding of the tool being then stopped. (See Fig. 1.) The index-ring is then unclamped from the body of the index-plate and rotated, for instance by grasping the finger-knob 182 there'- on, until the index-mark 171 registers with the mark on the index 137, which indicates the desired depth of out or axial movement of the tool-spindle, whereupon the clamp is again operated-for clamping the index-ring to the body of the index-plate for causing the index-ring to move with the body of the index-plate. This movement is in the direction of the arrow (4.

The feeding of the drill into the material is then begun, the index-plate, including its ring, rotating with the pinion 56 torotate the worm-wheel 61, until the Zero mark on the index 137 registers with the ineex-mark 171, at which moment the apex of the shoe 151 registers with the apex of the shoe 178, and the apexes 162, 166, of the pins 161, 163, are at the point of passage to cause quick tripping movement of the se ment-rack by means of the springs and consequent disengagement of the clutch 126. The operation may thereupon be repeated as many times as desired without change of relation in the index means, for again causing a similar feeding movement at the same portion of the axial movement of the tool-spindle.

If it is desired to obtain an axial movement of the tool-spindle greater than the circumferential pitch line of the pinion 56, the index 138 is employed, the point of the tool being again brought to contact position on the work. The index-ring being unclamped, it-is turned until the desired depth of cut or axial movement of the tool-spindle is indicated on the inner index 138 in line with the index-mark 172, whereupon the index-ring is again clamped to the body of the indexplate. The handle 173 is then moved outwardly and turnedto cause an axial and a rocking movement of the shank 169. The collar 176 is provided with a tongue 183 which normally lies in a groove 18%: in an enlargement 185 of the sleeve 153. The axial movement of the shank 169 moves the collar and sleeve forwardly into the position shown in Fig. 1. The rocking movement of the shank causes the tongue to lie crosswise of the groove, the collar and handle being turned into the assumed positionsshown in Figs. 10 and 11. This turning of the shank also moves the shoe 178, which is eccentrically placed on the shank, out of the path of the shoe 151. V

Fig. 10 indicates the position and relation of the parts of the, knock-off shoe and pin when the feed is set for example at a depth to correspond to the beginning of the markings of the inner index, instanoed as a feed of 6.001 inches.

In Fig. 11 the parts and the relation of the shoe and pin are indicated to represent a maximum feed within the capacity of the inner index, and is instanced as a feed of a depth of twelve inches.

The collar is provided with a tripperfinger 187. When the indexis set for an indication requiring more than one revolution of the indexplate to trip the clutch in order to cause cessation of feeding movement, the pin 152 will, at approximately the first arrival of the zero mark of index 137 at the index-mark 171, strike the finger 187 and cause rotation of the collar 176, and the shank 169, for placing the shoe 178 in the path of the shoe 151, this relation of parts being shown in Fig. 12, it being understood that when the said collar has been rocked, as shown in Figs. 10 and 11, that the shoe 178 is out of registry with the path of movement of the shoe 151. V dex-plate completes its final rotation, the shoe 151 will coact with the shoe 178, and thereby move the shank 169 inwardly and causeinward movement of the rack 155 for rocking the segment-rack 156 and disengaging the clutch 126.

It will be noted that there is a space 189 between the zero mark and the highest mark on the outer index, and a space 190 between the lowest mark and the highest mark of the inner index. These spaces represent the difference between the pitch-line circumference of the pinion 56 and a whole number. Thus, if a complete revolution of the pinion 56 represents an axial travel of the toolspindle of a fraction more than six inches, the spaces represent the fraction, which forms a gap in the index, the gap being compensated by the space 191 between the index-marks 171, 172, which would represent the angular travel of the index-plate, through said fractional space, the angular distance between the index-marks 171, 172, bridging said spaces 189, 190.

The shank is provided with a screw 192, serving as a pin, which is slidable in a slot 193 in the rack-sleeve, the slot having a portion which is parallel with the axis of the shank, and a portion which is at right angles thereto, the relations of the parts being preferably such that the axially extended relation between the shank and sleeve is maintained by contact of the head of the screw with the right angular portion of the wall of said slot, for relieving the frictional engagement between the tongue of the collar and the outer face of the enlarged portion of the rack-sleeve. A spring 194, the ends of which are respectively secured to pins 195 and 196, respectively in a bore 197' of the shank and the bore 175 in said rack-sleeve, normally draws the shank inwardly.

Safety means are also provided for stopping the axial feed of the tool-spindle. (See Figs. 14, 15, and 16.) Thus the rockshaft 131 is provided with a bore 201 in which a rod 202 is axially movable. The rack-sleeve of the spindle is provided with a bracket 203 having a cam-face 204 there- When the in on. The rod has a pin 205 fixed therein transversely thereof. The pin is fixed to a collar 209 slidable on the rock-shaft 131. The pin slides in a slot 206 in the rockshaft and is arranged to impinge a camface 207 on a cam-block 210 fixed to the drill-head, when the rod 202 is moved axially by the cam-face 204, which occurs when the drill-spindle has reached its desired lowermost limit of movement, whereby the shaft 131 is rocked by movement of the pin 205 along the camface 207, for disengaging the clutch 126 and stopping the feed of the spindle. A spring 208 normally urges the rod 202 toward the camface 204.

It is obvious that changes may be made in the exemplifications hereinbefore described within the scope of the appended claims, without departing from'our invention.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent, is:

1. In feeding mechanism for metal working machinery, the combination of a toolspindle, feeding means therefor comprising a face-plate and a rotatable member for feeding said tool-spindle, and means for causing inactive relation in said feeding means comprising a rocking member, an axially movable slide coacting therewith, said face-plate provided with a part adjustable about the axis of rotation of said rotatable member for actuating said slide, and resilient means acting to augment said lastnamed actuation during the end portion of said actuation.

2. In feeding mechanism for metal working machinery, the combination of a toolspindle, means for feeding said tool-spindle comprising a disengaging element, a faceplate and a rotatable element, and means for automatically disengaging said disengaging element comprising a rockable member having operative connection with said disengaging element, an axially movable member, rack connection between said axially movable member and said rockable member, and an actuating part for the latter adjustable about the axis of rotation of said rotatable member.

3. In feeding mechanism for metal working machinery, the combination of a toolspindle, means for feeding said tool-spindle comprising a disengaging element, a faceplate and a rotatable element, and means for automatically disengaging said disengaging element comprising a rockable member having operative connection with said disengaging element, an axially movable member,

rack connection between said axially movable member and said rockable member, an actuating part for the latter adjustable about the axis of rotation of said rotatable memher, and resilient means acting to continue disengaging movement of said EOClZiLlQlG member after initiation of said disengaging movement by said actuating part.

41-. In feeding mechanism for metal working machinery, the combination of a toolspindle, means for axially feeding said toolspindle comprising clutch and a rotatable member having operative connection with said tool-spindle for feeding the same, and means for automatica ly stopping said feeding movement at predetermined points comprising roclcshaft having operative connection with said clutch, an axially movable slide-member having operative connection with said rock-shaft for rocking the same, an index-ring rotatable with said rotatable member, and means for selectively connecting said index-ring and said rotatable memher, said index-ring having means thereon coacting with said axially movable slidemember for axially moving the latter at a predetermined point of relation between said rotatable member and said axially movable slide-member.

5. In feeding mechanism for metal working machinery, the combination of a toolspindle, feeding means therefor comprising a movable element, and means whereby to place said movable element in inactive relation for stoppage of feeding movement of said spindle comprising an inderemember, a rotatable axially movable device for moving said movable element, said rotatable axially movable device including a manually operable part, said index-member and said device provided with coasting parts for axial movement of said device, said manually movable part having connection with one of said coacting parts to relate said coacting parts in inactive relation, and said indexmember and said device provided with coaeting parts for placing said last-named one of said coacting parts in coactive relation with its mating coacting part.

6. In feeding mechanism for metal working ma hinery, the combination of a toolspindle, feeding means therefor comprising a movable element arranged to be placed in inactive relation for stoppage of feeding movement of said spindle, an index-plate, an axially movable slide laving operative connection with said movable element for moving the same, and a rotatable stem having slide-connection with said slide, said stem provided with a fin and a contact part, and said index-plate provided wlth a coacting part for said finger for rotating said stem and with a coacting part for said contact part for axially moving said stem and slide.

7. in feeding mechanism for metal working machinery, the combination of atr alspindle, feeding means for sait tool-spindle, and means for causing automatic stoppage in feeding movement of said tool-spindle comprismg an axially movable member, a rotatable and axlally movable member re- 'ceived in the latter, said members provided with coacting parts for holding the same in relatively extended relation when said last-named member is rotated, and means having connection with said feeding means for rotating said rotatable and axially movable member and" for axially moving both said members.

8. In feeding mechanism for metal working machinery, the combination of a tool.- spindle, feeding means therefor, a rockermember causing inactive relation in said feeding means, a rotatable and axially movable member having connection with said rocker-member, a face-plate and a rotatab.e member of said feeding means having coincident axes of rotation, tripping means rotating therewith for rotating said rotatable and axially movable member, and actuating means rotatable therewith for axially moving said rotatable and axially movable memher, said tripping means and actuating means adjustable about the axis of rotation of said rotatable member.

9. In feeding mechanism for metal work= ing machinery, the combination. a toolspindle, means for feeding said tool-spindle axially, and means for causing automatic disengagement in said feeding means for stoppage of feeding movement of said toolspindle comprising an axially movable member provided with a bore, a rotatable and axially movable member received in said bore, means for aintaining said members in extended relation upon rotation of mill second-named member, and a W said face-plate and second-named member provided with coacting tripping n'ieans for rotating said second-named member, said face-plate and second-named member provided with coacting actuating means, said actuating means of said seconcbnamed member being out of the path of said actuating means of said face-plate when said secondnamed member is manually set for tripping relation, and said actuating means being in coactive relation during tripped relation of said second-named member for causing axial movement of said second-named member upon coaction of said coacting actuating means. c

10. In feeding mechanism for metal working machinery, the combination of a toolspindle, means for axially feeding said tool spindle, and means for automatically causing stoppage of feeding movement of saidtool-spmdle comprising a driving element in said feeding means, a rocking element having operative connection with said driving element for moving the latter into in operative relation, a rotatable and axially movable member having operative connecring adjustable about the axis of rota of tion with said rocking element for rocking and axially movable member for coactivrelation ofthe actuating parts.

11. In feeding mechanism for metal working machinery, the combination of a toolspindle, means for feeding aid tool-spi comprising a movable element-and a rotatable element, a rotatable and. axially movable member having operative connection with said movable element for placing the same in inoperative relation, and an indexsaid rotatable element, said ring provided with a tripper part ing said rotatable and axially movable m 2mber into axially movable relation and with an actuating part for automatically axially moving said rotatable and axially movable member.

1 2. In feeding mechanism for metal working machinery, the combination of a toolspindle, a feed-rack therefor, a pinion ineshing with said feed-rack, means for rotat said pinion comprising a movable. elemen a face-plate having rotative connection with said pinion, said facerplate comprising a ring of an index means having a plurality of annularly arranged indices, an indexfinger coacting with .aid plurality an nularly arranged indiccs, the ends of said respective indices having a space between them forming gaps in said indices, said linger provided with spaced-impart mar -'s having a space between them coincident with the angular section of said gap, said index ring adjustable about the axis of rotation of said face-plate, and actuating means between said. ring and said movable element for moving said mo *able element into in active relation.

13. In feeding mechanism for metal wort:- ing machinery, the combination of a toolspindle, feeding means for said tool-spindle comprising a movable element, and means for causing stoppage of feeding movement of said tool-spindle comprising an actuated member having operative connection with said movable element for placing the same in inactive relation, and a face-plate having connection with an element of said feeding .means, said face-plate comprising a ring of face-plate, and said ring and said actuated member provided with coacting means normally out of coacti 'e relation incident to one of said indices, whereby said actuated member is caused to move said movable element into inactive relation, and with coacting means incident to another of said indices whereby to place said first-named coacting means into coactive relation.

14:. In feeding mechanism for metal working machinery, the combination of a toolspindle, feeding means for said tool-spindle comprising a movable element, and means for causing stoppage of feeding movement of said tool-spindle comprising a member having operative connection with said movable element for placing the same in inactive relation, and a rotatable face-plate having connection with an element of said feeding means, said faceplate comprising ring of an index means having a plurality of annularly arranged indices, said ring adjust able about the of rotation of said faceplate, and said ring and said member provided witlrcoacting parts incident to one of said indices and with coacting parts incident to another of said indices, arranged for actuation in sequence, whereby to move said movable element into inactive relation.

15. In feeding mechanism formetal working machinery, the combination of a toolspindle, feeding means for said tool-spindle comprising a movable element, and means for causing stoppage of feeding movement of said tool-spindle comprisin a rotatable member arranged to be actuated and having operative connection with said movable element for placing the same in inactive relation, and a rotatable face-plate having connection with an element of said feedin means, said face-plate comprising ring or an index device having a plurality of annu larly arranged indices, said ring adjustable about the axis of rotation of said face-pla e, and said ring provided with a part coacting with one of said annularly arranged indices causing rotating of said rotatable member.

and with a part coacting with the other of said annularly arranged indices for actuating said rotatable member, whereby to move said movable element into inactive relation.

16. in feeding mechanism of the character described, the combination of a toolspindle, means for axially feeding the same comprising a clutch, a rock-shaft having operative connection with said clutch for causing engagement and disengagement in the same, said rock-shaft provided with a bore, an axially movable rod therein, and a relatively stationary part provided with an 'nclined face, said rod provided with part coacting with said inclined face by axial movement of said bar for rocking said rockshaft, and said tool-spindle provided with a part having an abutting face for axially moving said rod proximate to the limit of safe movement of the tool spindle for releasing said clutch.

17. In feeding mechanism for metal working machinery, the combination of toolspindle, feeding means therefor comprising a feed-shaft, a clutch therefor, a face-plate, a rotatable member operated by said teedshaft, said rotata le member arranged to coact with said -face-3i ate in feeding said toolspindle, and means automatically causing inoperative relation in said clutch comprising a rocking member having operative connection with said clutch, and an axially movable member having operative connection witl said rocking member, said plate l lart adji" ble about provided with a the axis of rotation of said rotatable member lly moving said axially movable ineniber.

In testimony whereoi we have hereunto signed. our names in the presence of two subscribing witnesses.

AUGUSTUS M. SQSl i. ALBERT E. ROBINSON. HERMAN N. SCHATZ.

\Vitnesses E. R. GROSSMAU, C. H. CORMANY.

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