US2262103A - Dividing apparatus for grinding machines - Google Patents

Dividing apparatus for grinding machines Download PDF

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Publication number
US2262103A
US2262103A US296846A US29684639A US2262103A US 2262103 A US2262103 A US 2262103A US 296846 A US296846 A US 296846A US 29684639 A US29684639 A US 29684639A US 2262103 A US2262103 A US 2262103A
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United States
Prior art keywords
cam
dividing
pin
disc
movement
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Expired - Lifetime
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US296846A
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English (en)
Inventor
Laessker Fritz
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ZF Friedrichshafen AG
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ZF Friedrichshafen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • B23Q16/04—Indexing equipment having intermediate members, e.g. pawls, for locking the relatively movable parts in the indexed position
    • B23Q16/06—Rotary indexing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23F—MAKING GEARS OR TOOTHED RACKS
    • B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
    • B23F23/08—Index mechanisms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30868—Work support
    • Y10T409/308792—Indexable
    • Y10T409/308848—Indexable including dividing head
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/14—Rotary member or shaft indexing, e.g., tool or work turret
    • Y10T74/1412—Rotary member or shaft indexing, e.g., tool or work turret with locating point adjusting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/14—Rotary member or shaft indexing, e.g., tool or work turret
    • Y10T74/1418—Preselected indexed position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/14—Rotary member or shaft indexing, e.g., tool or work turret
    • Y10T74/1418—Preselected indexed position
    • Y10T74/1424—Sequential
    • Y10T74/1453—Interlocked rotator and brake

Definitions

  • This invention relates to an improved dividing apparatus for grinding machines for the grinding of spur pinlons, grooved shafts or the like having a dividing disc provided with notches corresponding to the number of the tooth spaces or grooves of the workpiece, and an insertible and removable index pin co-operating therewith together with a control mechanism therefor.
  • Dividing apparatus for pinionand grooved shaft-grinding machines as heretofore proposed are operated by the relative movement between the machine bed and the table slide by means of cams, the dividing operation taking place during the end portion or the movement oi the table, and the control members returning, after the reversal of movement of the table, during the starting movement of the table into their initial position.
  • Such an arrangement has two disadvantages, that is to say the table-travel necessary for the dividing movement has to be utilised twice, whereby the idle run time is considerable and the grinding capacity low, and, moreover, a separate mechanism, which effects the control of the index pin movement in the one direction of movement of the table but is switched out in the other direction, is necessary.
  • This invention whilst avoiding the aforesaid disadvantages, provides a particularly simple construction of an automatic dividing apparatus in which the highest grinding capacity is attained with the utilisation of the end portion of the slide table movement, the rest period and the re-starting movement thereof for eifecting the dividing operation.
  • the dividing apparatus constructed in accordance with the invention is universally usable for dividing workpieces having only a few or a great number of teeth and is also suitable for use with grinding' i machines for the grinding of pinions with straight or screw-like teeth.
  • a particular characteristic of the invention consists in the use of the fluid pressure provided' for actuating the table slide for operating the dividing apparatus.
  • the control cams for the feed and index pin operation are constructed with symmetrical rising and falling portions, such ment is effected by only one direction of movement of the cams.
  • the drive of the control cams in the other direction of movement then likewise produces in the same sequence the control and the return movement of the parts.
  • Figure 1 being a front View of the most essential parts seen in 'the direction of the arrow I of Fig. 2.
  • the casing of the apparatus has been omitted.
  • all the parts are shown in the position of rest with the index pin engaging one of the spaces of the dividing disc.
  • Fig. 2 is a part sectional elevation of the apparatus.
  • Fig. 3 shows a portion of Fig. l to a larger scale.
  • Fig. 4 is a. view of Fig. 3 seen from above.
  • Fig. 5 is a front view and shows the individual parts in a position differing from that shown in Fig. 1, that is to say with the index pin withdrawn at the commencement of the dividing operation of the dividing disc.
  • Fig. 6 is a similar view to Fig. 5 but showing another position of the parts in which the index pin is withdrawn from the dividing disc and the dividing movement has been practically completed.
  • Fig. 7 is a similar view to Fig. 6 but showing the parts at the end of the dividing movement
  • Fig. 8 is a partly diagrammatic view of the control mechanism for actuating the dividing apparatus.
  • Fig. 9 is a sectional view of the cock serving for the automatic control of the supply and cutting off of the pressure means to and from' the dividing apparatus together with the actuating parts therefor, and
  • Fig. 10 is a longitudinal sectional view of the cock shown in Fig. 9.
  • the casing is ncn-rotatably connected by the wedge or key member 2
  • a lever 24 carrying the index pin 23, and so influenced by a spring 25 that the index pin is normally forced towards the dividing disc 8 and enters one of the spaces 9 thereof.
  • the spring 25 is preferably a compression spring and is supported on a projection or shoulder 26 of the easing 20 and acts against the rearward end of the lever'24, which, for this purpose, is formed with a lateral arm adapted to take the spring pressure.
  • Level with the index pin lever 24 is also mounted on the pin 22 the index control lever 28, which preferably carries a roller which is pressed against the index control cam 32 freely mounted on the hollow shaft l4.
  • the index pin lever 24 and the control lever 28 are adjustable relatively to one another for the purpose of ensuring their correct co-operation with the dividing disc 8 on the one hand and the index control cam 32 on the other hand.
  • a stop pin 29 carried in the index control lever 28 and an adjusting screw 36 carried by the index pin lever 24 and directed towards the pin 29 are employed.
  • the index control cam 32 carries on its hub 33 a toothed portion 34 which engages another toothed portion 35, that is to say a rack portion of a double acting piston 36.
  • This piston 36 is guided in a cylinder 31 located in the casing 20. At both ends of the piston 36 are cylinder spaces 38 and 39 to which pressure medium conduits 4
  • a brake lever 44 Adjacent the index control lever 28 is freely rotatably arranged'on the pin 22 a brake lever 44, which is pressed by a spring 45 against the brake surface the latter is provided with a carrier pin 46 against which the brake lever 44 bears by means of an adjusting screw 41 arranged laterally thereon.
  • the index control cam 32 carries a carrier pin 50, which engages in an arcuate slot 52 formed in l the rotatable feed control cam 53, the slot 52 being so dimensioned that the feed control cam 53 is actuated in unison with the swinging out of the index pin 23 from the dividing disc 8.
  • cam 53 The actual cam surface of cam 53 is made symmetrically rising and falling on both sides, whereby, regardless of the direction of the working stroke at any time, both the dividing, that is to say feed movement, as well as the return movement of the control members is effected.
  • a roller 55 of a link member 51 swingably carried by means of a pin 56in the casing 20, which link member 57 is acted on by a tension spring 58.
  • roller 55 is pivoted a second link 60, which carries a pin 62 which projects into an arcuate slot 63 formed in the feed lever 65 and can be adjusted and fixed in this slot as desired by means of a suitable screw, asis necessitated by the size of the feed movement.
  • the double acting piston 36 commences to move towards the left, whereby, through the medium of the rack 35, the index control cam 32 is swung in the direction of the arrow A indicated in Fig. 1.
  • the index control cam 32 forms a segment of a circle with a raised portion which is made of a definite size, that is to say extends over the middle part of the peripheral surface.
  • On the initial rotation-of the index control cam 32 its pin 50 slides in the arcuate slot 52 of the feed control cam 53 and as soon as, on the further rotation of the index control cam 32, the index control lever 28 moves on to the raised portion of the cam 32, the index pin 23 is lifted out of engagement with the dividing disc 8.
  • the pin 50 reaches its end position at one end of the slot 52, as shown in Fig. 5.
  • the feed control cam 53 is moved in the direction of the arrow A (Fig. 5'). Consequently, owing to the running of the roller 55 on the cam '53, the link'5'l is swung outwardly and the feed angle, Fig. 6 shows' an intermediate position during the feed movement. At the end of this To the pivot pin 59 of the.
  • the roller has attained the peak or apex point of the feed control cam 53 and from then on, on the further rotation of this cam 53, with the sliding of the index control lever 28 off the raised portion of the index control cam 32, the index pin 23 is moved into the next space 9 of the dividing disc 8 and immediately thereon the return movement of the feed lever 85 in the direction of the arrow C, Fig. 7, into its initial position is effected by sliding of the roller 55 on the descending portion of the feed control cam 53 located on the other side of the apex point.
  • the dividing apparatus is, for example, provided wiith a control mechanism shown in Figs. 8, 9 and 10. It is assumed in this case that a pressure fluid, for example oil, is employed for effecting the'reciprocating movement of the table slide 2.
  • a pressure fluid for example oil
  • a pressure medium cylinder I8 through which passes a piston rod I3 on which is mounted a piston 15, which rod I3 is carried on the table slide 2 by means of projections II and I2.
  • a storage container is provided together with a suitable pump, preferably a geared pump 8!.
  • sucks throughthe medium of the conduit I9, and forces the oil through the conduit 82 to the throttle valves 83 and 84 which are adjustable by hand.
  • an overflow valve 18 In the conduit 82 is arranged an overflow valve 18.
  • One of the valves 83 is intended for feeding the device for moving the table slide 2, whilst the other valve 84 serves for the adjustment of the pressure oil supply to the dividing apparatus.
  • Both valve spindles are located adjacent one another and carry pinions 85, 88 which interengage.
  • a slipping clutch is provided in the spindle of the valve 84.
  • both working speeds are controlled together and in the same proportion by the common control valve 83.
  • the second valve 84 'for controlling the dividing is provided adjacent the table control valve 83 for the purpose of adjusting the dividing speed relatively to the speed of P the table slide 2 in the case of particularly large or small workpieces.
  • the two valves 83 and 84 are coupled together through the friction clutch coupling and, in the case a relative adjustment of the two speeds is desired, the friction coupling p all duit us;
  • a conduit 81 leads from the valve 83 to the control cock 88 for the table slide movement, and the conduits 89 and 98 lead from this cock 88 to the cylinder spaces I8 and 11.
  • a cock 92 secured to the table slide 2 is provided, which cock is fed through the conduit 93 from the valve 84.
  • the cook 92 is provided with a cock plug 95 formed with suitable cut-out portions, which cock plug can be rotated on its shaft through the medium of a pinion 98 and a rack 91.
  • the rack 91 is formed of a vertically displaceable bolt 99 held by a spring 98 in the lower rest position and having a lower bevelled 'end I88 projecting out of the body of the cock 92.
  • This bolt end I88 which can also, if desired, be provided with a roller, projects into the path of cam pieces I82 and I83 which are arranged longitudinally adjustably on the machine bed I and fixable thereon by screws I85.
  • cam pieces I82 and I83 are, in accordance with the invention, located at positions where, in relation to the position of the table slide 2, it is desired to eifecta dividing operation, so that, on the said end I88 striking one or the other of the cam pieces I82 and I83, the change-overof the cock plug 95 is effected in such a manner that the pressure oil is fed alternately through the conduits 4
  • An inward movement of the bolt 99 causes the movement of the cock .arrow shown in Fig. 9.
  • a hand 'wheel H3 is fixed on the shaft I88.
  • cock 92 constitutes a four-way valve.
  • the cock plug 95 is provided with opposed circumferential recesses, one of which is shown in Fig. 10. Each recess connects to adjacent ports.
  • supply conduit 93 is connected to line 42 and cylinder space 39; and line H from cylinder space 38 is vented to outlet pipe II5.
  • a ninety degree rotation of plug 95 under actuation of bolt 99 reverses the-connections and connects supply conduit 93 to line 4! and cylinder space 38, and vents cylinder space 39 through line 42 to outlet pipe I I5.
  • conduits M and of hose pipes particularly in the ,case where the whole dividing apparatus is rotated by means of a rolling device when pinions with screw-like running teeth are to be ground.
  • a reciprocating table slide actuating means for reciprocating the table slide dividing apparatus including a rotatable dividing disc having a-plura1ity of notches around the periphery thereof, and a retractable index dependently of the movement of said table slide and control means for said last mentioned means operated by said table-slide for initiating operation of said cam-rotating means to effect a dividing operation.
  • a reciprocating table slide including a rotatable dividing disc having a plurality of notches around the periphery thereof and a retractable index pin co-operating with said dividing disc, said pin being adapted to be moved into and out of engagement with the notches in said disc; control mechanism for actuating said index pin; a rotatable cam for operating said index pin control mechanism, said cam having symmetrical rising and falling surfaces whereby said control mechanism is moved in operative direction'and returned to its normal inoperative position by movement of said cam in one direction; control mechanism for actuating said dividing disc; a rotatable cam for operating said dividing disc control mechanism, said cam also having symmetrical rising and falling surfaces whereby said control mechanismis moved in operative direction and returned to its normal inoperative position by movement of said cam in one direction;
  • means operating to rotate said cams independently of movement of said table-slide, and means i for reciprocating said table slide and for initiating operation of said cam-rotating means to effeet a dividing operation.
  • a reciprocating tableslide including a rotatable-dividing disc having a plurality of notches around the periphery thereof and a retractable index pin co-operating with said dividing disc, said pin being adapted to be moved into and out of engagement with the notches in said disc; a rotatable cam for actuating said index pin; a second rotatable cam for actuating said dividing disc, said second cam being operatively connected to said first-mentioned cam; fluid pressure operated means for actuating said first-mentioned cam independently of operation of the table slide actuating means; a source of fluid pressure supply and means for s1- multaneously connecting both said fluid pressure operated means to said supply source.
  • a reciprocating tableslide including a rotatable dividing disc having a plurality of notches around the periphery thereof; and a redisc; a rotatable-cam for actuating said index pin; a second rotatable cam for actuating said dividing disc, said second cam having a lost-motion connection with said first-mentioned cam; a cylinder associated with said dividing apparatus; a double-acting piston movable in said cylinder, said piston'being operatively connected'to said index pin control cam; a source of fluid pressure supply communicating with said tableslide-actuating means and said cylinderto operate said piston therein and control means for controlling the supply of fluid to said cylinder operated by the table slide to initiate supply of fluid, and operative thereafter independently of the table slide to maintain the supply of fluid to said cylinder.
  • a reciprocating tableslide including a rotatable dividing disc having a plurality of notches around the periphery thereof; a retractable index pin co-operating with said dividing disc, said pin being adapted to be moved into and out of engagement with the notches in' said disc; a rotatable cam for actuating said index pin; a second rotatable cam for actuating said dividing disc, said second cam having a 10stmotion connection with said first-mentioned cam; a cylinder associated with said dividing apparatus; a double-acting piston movable in said cylinder, said piston being'operatively connected to said index pin control cam; a source offluid pressure supply communicating with said tableslide-actuating means and said cylinder to operate said piston therein and control means for.
  • a reciprocating tableslide including a rotatable dividing disc having a plurality of notches around the periphery thereof; a retractable index pin co-operating with said dividin disc, said pin being adapted to be moved into and out of engagement with the notches in said disc; a rotatable cam for actuating said index pin; a second rotatable cam for actuating said dividing disc, said second cam having a lostmotion connection with said first-mentioned earn; a cylinder associated with said dividing apparatus; a double-acting piston movable in said cylinder, said piston being operatively connected to said index pin control cam; a source of fluid pressure supply communicating with said tableslide-actuati'ng means and said cylinder to operate said piston therein and control means for controlling the supply of fluid to said cylinder comprising valve means carried by the table slide operative
  • a reciprocating tableslide including a rotatable dividing disc having a plurality of notches around the periphery thereof and a retractable index pin co-operating with said dividing disc, said pin being adapted to be moved into and out of engagement with the notches in said disc; a rotatable cam for actuating said index pin; a second rotatable cam for actuating saidone of said valves controlling the fluid pressure supply to said table-slide and the other controlling the supply to the dividing apparatus and said valves being operatively interconnected such that actuation of said first-mentioned valve co-operating with said dividing disc, said pin being adapted to be moved into and out of engagement with the notches in said disc; a rotatable cam for actuating said index pin; a control lever for actuating said dividing disc, said lever being pivoted on said spindle and having an arcuate slot therein; a second rotatable cam for actuating said index pin; a control lever for actuating said
  • a reciprocating tableslide including a rotatable dividing disc having a plurality of notches around the periphery thereof and a retractable index pin co-operating with said dividing disc, said pin being adapted to be moved into and out of engagement with the notches in .said disc; a rotatable cam for actuating said index pin; a second rotatable cam for actuating said dividing disc, said second cam being operatively connected tosaid first-mentioned cam;
  • fluid pressure operated means for actuatingsaid first-mentioned cam; a source of fluid pressure supply and means for simultaneously connecting both said fluid pressure operated means to said supply source, said means comprising a pair of valves, one of said valves controlling the fluid pressure supply to said table-slide and the other controlling the supply to the dividing apparatus and said valves beingoperatively interconnected such that actuation of said first-mentioned valve causes simultaneous actuation of said other valve; and a friction coupling between said valves -to allow of regulation of the dividing speed relative to the speed of said table-slide.
  • a reciprocating tableslide including a rotatable dividing disc having a plurality of notches around the periphery thereof and a retractable index pin co-operating with said dividing disc, said pin being adapted to be moved into and out of engagement with the notches in said disc; a rotatable cam for operating saidindex pin; a control lever for actuating said dividing disc; a second rotatable cam for operating said lever; means for varying the amount of movement of said lever by said second cam to vary the amount of rotation of said dividing disc; means operating to the periphery thereof and a retiactable index pin ble-slide to rotate said cams, means for reciproeating said table-slide and for initiating opera" tion of said cam-rotating means to eflfect a dividing operation.
  • rotatable dividing disc mounted on said spindle, said disc having a plurality of notches around the periphery thereof and a retractable index pin co-operating with said dividing disc, said pin being adapted to bemovedinto and out of engagement with the notches in said disc; a rotatable cam arranged centrally on said spindle for actuating said index pin; a control lever for actuating said dividing disc, said lever being pivoted on said spindle and having an arcuate slot therein; a second rotatable cam arranged centrally on said spindle for actuatingsaid control lever; a link member pivoted at one end to a fixed point on said machine; a roller on the other end of said link member; spring means for holding said roller in engagement with said second cam; a second link member pivoted atone end to the roller:
  • control means operated by the table slide for initiating operation of the cam actuating means.
  • a reciprocating table slide actuating means for the table slide, a rotatable spindle, a notched dividing disc and a ratchet ring fixed to the spindle, a retractable index pin engageable with the notches in the dividing disc to lock the disc against rotation, a movable feed pawl engageable with the ratchet ring for rotating said ring, power operated actuating means for effecting the dividing operation, a movable member operated by the power operated actuating means, first cam means carried by the movable member operatively' connected to the index pin for retracting the same turn the same to rest position for rotating the ratchet ring, and lost motion means connecting the second cam means to the movable member for operation after retraction of the index pin by operated by the actuating means, first cam means operated by the movable member operatively connected to the index pin for retracting.
  • second cam means operated by said movable member, operative to move the pawl and return the same to rest position for rotating the ratchet ring, and adjustable coupling means connecting the second cam means to the pawl for varying the movement of the pawl under operation of the second cam means.
  • a rotatable spindle, a notched dividing disc and a ratchet ring fixed to the spindle, a retractable index pin engageable with the notches in the dividing disc to lock the disc against rotation, a movable feed pawl engageable with the ratchet ring for rotating said ring, power operated actuating means for actuating the pawl and index pin, a movable member operated by the actuating means, first cam means operated by the movable member operatively connected to- the index pin for retracting the same to permit movement of the dividing disc and for returning the pin for locking the disc, second cam means operative to move the pawl and return the same to rest position for rotating the ratchet ring, lost motion means connecting the second cam means to the 'movable member for operation after retraction of the index pin by the first cam means, and adjustable coupling means connecting the second cam means to the pawl for varying the movement of the pawl under operation of the second cam means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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US296846A 1938-09-27 1939-09-27 Dividing apparatus for grinding machines Expired - Lifetime US2262103A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422414A (en) * 1943-04-19 1947-06-17 Cincinnati Milling Machine Co Index milling machine
US2446865A (en) * 1941-06-09 1948-08-10 James H Barnes Indexing mechanism
US2462522A (en) * 1945-12-15 1949-02-22 Michigan Tool Co Grinding machine
US2600960A (en) * 1948-12-08 1952-06-17 Benjamin Index fixture
US2622487A (en) * 1947-12-23 1952-12-23 Robbins Engineering Company Indexing table
US2714316A (en) * 1951-09-22 1955-08-02 Borg Warner Apparatus for manufacturing earthworking discs
US2733700A (en) * 1956-02-07 Dressing mechanism
US2848909A (en) * 1956-04-03 1958-08-26 George H Hill Indexing apparatus
US2858006A (en) * 1955-05-25 1958-10-28 Western Electric Co Work feed devices
US2915921A (en) * 1955-08-22 1959-12-08 Harold W Scholin Indexing mechanism
US4884474A (en) * 1986-08-02 1989-12-05 Kawata Chuck Manufacturing Co. Ltd. Device for indexing

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733700A (en) * 1956-02-07 Dressing mechanism
US2446865A (en) * 1941-06-09 1948-08-10 James H Barnes Indexing mechanism
US2422414A (en) * 1943-04-19 1947-06-17 Cincinnati Milling Machine Co Index milling machine
US2462522A (en) * 1945-12-15 1949-02-22 Michigan Tool Co Grinding machine
US2622487A (en) * 1947-12-23 1952-12-23 Robbins Engineering Company Indexing table
US2600960A (en) * 1948-12-08 1952-06-17 Benjamin Index fixture
US2714316A (en) * 1951-09-22 1955-08-02 Borg Warner Apparatus for manufacturing earthworking discs
US2858006A (en) * 1955-05-25 1958-10-28 Western Electric Co Work feed devices
US2915921A (en) * 1955-08-22 1959-12-08 Harold W Scholin Indexing mechanism
US2848909A (en) * 1956-04-03 1958-08-26 George H Hill Indexing apparatus
US4884474A (en) * 1986-08-02 1989-12-05 Kawata Chuck Manufacturing Co. Ltd. Device for indexing
US4991463A (en) * 1986-08-02 1991-02-12 Kawata Chuck Manufacturing Co., Ltd. Device for indexing

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Publication number Publication date
CH227169A (de) 1943-05-31

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