US921343A - Grinding-machine. - Google Patents

Description

W. J. BASTIAN a P. GRANITZ.

' GRINDING MACHINE.

APPLICATION FILED DBO. 14, 1908.

921 ,343. Patented May 11, 1909. 6 SHEETS-SHEET l.

@D ,Y g Y- EE- m W. J- BASTIAN & P. GRANITZ.

GRINDING MACHINE. APPLICATION Hmm 1120.14. 190s.

Patented May' 11, 1909.

6 SHEETS-SHEET 2.

Nw s 1n: man Pxrsns co., mmm; n. e.

4W. J; BASTIAN a F. GRANITZ;

' GRINDING MACHINE. l APPLICATION FILED DEO. 14, 190B.

Patented May 11, 1909.

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IIIIIII gli llllllll IIN W.1J. BASTIAN sp-F. GBANITZ.

GBINDING MACHINE. v APPLICATION FILED DEG. 14, 1908.

Patented May 11', 1909.

e SHEETS-SHEET 4 Illullg Ulli ill fk W. J. BASTIAN F. GRANITZ:

GEINDING MACHINE. APPLIoAToN FILED DB0. 14, 190e.

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Patented May 11, 1909.

6 SHEETS-SHEET 6.

"Unir isrars PATENT OFFI@F.

WILLIAM BASTIAN AND FRANK GRANITZ, OF CHICAGO, ILLINOIS, ASSIG-NORS TO AMERICAN CUTLERYCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

GRINDING-MACIINE Specification of Letters Patent.

Application filed December 14, 1908.

Patented May 1 1, 1909.

Serial No. 467,411.

To all whom it may concern:

Be it known that we, ntf'iViLLrAM J. BAsTmN and FRANK GRANITZ, citizens of the United States, residing at Chicago, in the county of )ook and State of Illinois, have invented a new and useful Improvement in Grinding- Machines, of which the following is a specification.

Our invention relates to improvements in the class of machines for grinding cutlery, such as knife-blades, or the like, in which a reciprocating work-carrier, or holder, is employed for moving the article to be ground against the grinding surface of a grindingwheel.

The principal objects of our invention are to provide a machine of the character referred to which will be positive in operation, which will be of such a construction as not to be rendered impaired for accurate work by long' continued. use 5 and, in general, to provide a machine which will serve toperform, to the fullest degree of satisfaction, the work required of machines of this class.

In the accompanying drawings we have illustrated our invention as embodied in a machine in which the grinding is performed during the return movement only of the work-carrier, in which- Figure l is a plan view of a machine constructed in accordance with our invention. Fig. 2 is a section taken at the line 2 on Fig. l. and viewed in the direction of the arrow. Fig. 3 is a section taken at the line 3 on Fig. l and viewed inthe direction of the arrow, this view being enlarged and illustrating the position of the gear-mechanism for actuating the work-carrier and the operating lever for said mechanism, when the operating lever is in the position for moving the work-carrier toward the grinding-wheel. Fig. 4 is a section taken at the line Ll on Fig. 3 and viewed in the 'direction of the arrow. Fig. 5 is a view like that of Fig. 3, showing the position of the gear-mechanism and the operating handle therefor when said handle is moved to a position for reversing the movement of the work-carrier. Fig. 6 is a section taken at the irregular line on Fig. and viewed in the direction of the arrow, this view illustrating the gears in top plan. Fig. 7 is a section taken at the irregular line 7 on Fig. 5 and viewed in the direction of the arrow. Fig. 8 is a top plan view of the oscillating bed of the machine, with the cooperating carriage l therefor removed. Fig. 9 is a bottom plan l view of the reciprocating work-carrier which, in the operation of the machine, reciprocates upon the bed illustrated in Fig. 8. ,'Fig. l0 is an enlarged section taken at the line 10 on Fig. 8 and viewed in the direction of the ar row. Fig. ll is a section taken at the line .Il on Fig.` l, the parts illustrated in this iigure being shown in normal position. i2 is a section takenat the line l2 on Fig. l and viewed in the direction of the arrow, with the arms for engaging with the lever for controlling the position of the gears, in side elevation, the parts illustrated in this figure being shown in the positions they assume when the work-holder has reached the limit of its forward movement; and Fig. 13 is a. view like that of Fig. 12 showing the position the parts assume preparatory to the initial movement of tlielwork-holder in returning to normal position.

rlhe frame of the machine is illustrated at le, the upper portion thereof being formed with an upright conduit 15 having` an opening l5a in its lower end through which water, which may be applied to the grinding-wheel in any desirable well-known n1 anner, as through the pipe I6, discharges, the grinding-wheel ci' the machine being illustrated at i6 and extending into the top portion of the conduit. rIhe grinding-wheel illustrated is of the well-known annular type provided with a tapering grinding surface 17, this wheel being mounted upon a shaft I8 carrying loose and 'lined pulleys 19 and 20, respectively, located on the shaft intermediate bearings 2,1 and 22 for the shaft 18, these bearings being carried by the frame of the machine, as hereinafter more fully described. Extending from the conduit portion l5 of the frame beyond the grinding-wheel 1.7 is a frame-extension 23, this extension being of general rectangular form and recessed as shown. A bracket 24 having a iiat upper surface and alining with the upper surface of the extension 28 extends forwardly of this extension, and resting upon the upper surface of the latter and this bracket is a bed of general rectangular form, pivoted at its forward end to the forward end of the bracket 24 as indicated at 26, and connected 1 at its opposite end at a lug 27 with one end of a spiral spring 2S, this spring having adjustable connection at its other end with a lug 29 on the extension 23, this spring-connec- Cgi the lever 92 is in the form of ahandle 93 carrying a lever 99 fulcrumed between its ends as indicated at to a stud 101 extending laterally from the lever 92, it being designed that the lower end of the lever 99 be normally spring-pressed toward the lever 92 through the medium of a spring 102 to ride against the lateral edge-portion of a U-shaped member 103 secured to the upper side of the casing 37, as indicated at 1.94, and containing two spaced recesses 105, 106 forming shoulders adapted to be alternately enga- ;v ed by the lower end of the lever 99 for releasably holding the lever 92 in different positions against the tension of the spring1 93 for the purpose hereinafter expressed.

Assuming the machine to be in the normal position illustrated in Fig. 1 and the driveshaft 41 and shaft 13 to loe constantly rotated by any suitable source of power, the operation, in so far as the machine has l; een described, is as follows: The operator after applying a knife, or any other article to lrc ground, to the pin 34 and hook 35 of the work-carrier 3.1, draws hack the lever 92 against the action of its spring 93 until the lower end of the lever 99 engages with the shoulder of the recess by reason of the action of the spring 101, as clearly represented in Figs. 3 and 4. Thus shifting the lever 92 causes the plate 55, sy reason of its connection with the rigid arm 95, to he oscillated to the position illustrated in Fig. 3, in which position the gear 53 is out of mesh with the gear 62 and the gear 59 meshes with the pin ion 63. From the foregoing description of the relation of the gears to the drive-shaft 41 and to the pinion 72, it will he understood that the constant rotation of the pinion 40 produces a continuous drive of the gears 53 and 59, and the gear 59 heing in mesh with the pinion 63 thereby drives the pinion 72, when the plate 55 is moved to the position hereinbefore referred to as illustrated in Fig. 3. The rack 74 and lever 32 being normally in the positions illustrated in Figs. 1 and 11, the initial rotation of the pinion 72 to the rightin Fig. 11 causes the rack to slide in the recess containing it in the carrier 31 to a position in which the rear end-w lls of its slots 76 engage with the shanks 77 of the screws 7 3. This initial movement of the pinion 72 causes the lever S2-to swing upon its pivot 34, thereby moving the arm thereof carrying the roller 37 toward the front of the machine, with the result of permitting the spring 23 to swing the bed 25 at its free end to the right in Fig. 1, thus swingingI the work-carrier 33 to a position in which it is out of alinement with the grinding surface of the wheel 16. Continued movement of the pinion 72, hy reason of its engagement with the teeth of the rack 74, and by reason of the engagement of the rear end-walls of the slots 76 with the screws 73, causes the carrier 31 to be moved toward the grinding-wheel, it being understood that in this construction the article to be ground during the forward movement of the carrier does not contact with the grinding surface of the wheel 16. The carrier continues in this movement until an arm 107 adjustahly connected with the carrier 31 and extending laterally therefrom engages at a cani surface 103 thereon with the upper end portion ofthe lever 99, this engagement causing the lower end of the lever to he withdrawn from engagement with the shoulder 105 therel-y permitting the lever 92 to turn to the position illustrated in Fig. 5 under the action of its spring 93, in which the lever 99 engages at its lowenend with the shoulder of the recess 106. s hereinliefore explained, it is designed that the article life moveu against the grinding surface of the wheel 16 upon the return movement only of the carrier 25, and this result is accomplished in the followingl manner: The throwing of the lever 92 to the position illustrated in Fig. 5 swings the plate 55 to .iosition in which the gear 59 is out of mesh with the gear 63 and in which the gear 53 meshes with the gear 62. rlhe result of the engagement of these gears descriled is that of causing the pinion 72 to le rotated in the reverse direction, but much more slowly tiran where it is rotated through the engagement of' the pinion P 3 with the 59, as is readily apparent from the foregoing description of the gear connections. lt is thus manifest that tiefere the carrier 31 commences its return movement, which will necessarily be slower than its forward. movement in carrying the work-carrier toward the grinding-wheel, the rack 74 must first he moved until the forward emi-walls of the slots 76 engage with the shanlrs 77 of the screws 7 3, the movement of the rack. 74 to this position occurring during the initial rotation of the pinion 72 immediately following the swinging of the plate 55 from the 3 to that 1llusposition illustrated in li' trated in llig. 5. Buring the movement of the racli 74 independent of the carrier 31 just descrihed, the lev 32 is swung to the position opposed to that hereincefore described in which the outer roller-equipped extreniitj.T of the latter is moved forwardly, thereoy forcing tie hed 25 and the work.- holder 33 toward the grinding-wheel against the tension of the spring 23. As soon as the rack 7 4 has completed its mov-ement independent of the carrier 31, its engagement with the screws 73 operates, under the continued rotation of the pinion 72, to return the carrier 31 to normal position, during which movement the article is pressed against the grinding-wheel and is ground. The provision of the gears on the plate 55 whereby oscillation of the latter serves not only to reverse the direction of rotation of the shaft 61 and therefore the pinion 72,

which it forces the carrier 31 toward thegrinding-wheel, operates against the tension oi the spring 25S, and th at, unless some positive means Vfor holding` the carrier against movement on thV bed 25 is rn'ovided during such turning of the lever, the bed n"ght begin its return movement immediately upon the reversal oi the machine as described before the lever 82 has forced the bed to'w ard the grinding-wheel. To prevent such an occurrence, we provide stop mechanism et which the following is a description: Pivoted at one end, as indicated at 109, on the side et the carrier 31 adjacent to the guide S9 is a catch 110 normally downwardly pressed by a coil spring 111, the tree end ci' this catch carrying a shoulder 112; and similarly pivoted between its ends, as indicated at 113, is a lever 114 having' a shouldered portion 115 engaging with the tree end oi the catch 110 as represented in Figs. 12 and 13, the opposite end ot the lever 11-1 having a cam snrlface 115L which normally projects into the path oi movenient ot the outer extremity el the bell-crank S2. idjustably secured on a side of the hed 25 and adjacent to the levers 110 and 114i, is a block 116, which extends into trie path of the free end of the lever 110 during the forward movement ol the carrier 31. rllhe block 116 should he so positioned that the shoulder 1 12 will be caused, alter riding over the top of this bloei; during the forward movementv ot the carrier, to be forced by the spring 111 into engagement with the forward end ol the block 116, and thus as soon as the lever 92 has been automatically moved to the revershnil position illustrated in Fig. 5 for moving` tne 1nell-crank 82 and returning the carrier 31, it will engage with this block and prevent movement of the carrier while the racl is n'ioving relative thereto. The cam surface 115 is so disposed as to cause the adjacent edge ol the lever 82 to ride upon it and raise the shoulder 112 to the position illustrated in Fig. 13 in which it clears the block 116 at the conclusion of the movement or the rack 74 relative to the carrier 31. Thus the positive turning oi the lever S2 to torce the carrier 31 toward the grinding-wheel before the carrier commences its return movement is insured.

The carrier 31 continues on its return movement until an arm 11'? ailjustably connected with the carrier engages the lever 98 and moves it to the intermediate position illustrated in Fig. 1, in which neither ol the gears 58 and 59 mesh with the gears 62 and pinion 63 respectively, and thus no power is communicated to the pinion 72, and the machine stops.

The oscillation of the bed 25 and carrier 31 causes the raclr to be moved longitudinally oi the pinion 72 and the shaft 69 to change to a slight degree its angular relation to the shalt G1, the sliding of the shaft 69 with relation to the bed and carrier being' provided for by the journal connection ol this shaft with the bed as hereinbefore described, and the changing oi the inclination of the shaft G9 tothe shalt 51 being compensated for by the sliding, universal joint between these shafts hereinbe'liore clearly set forth.

lhe material oi which the grinding-wheel is ually composed is oi such a character as to cause it to wear away more or less rapidly, and thus it is desirable that the wheel be so mounted on tae frame oi the machine as to permit it to be readily ted toward the path ot movement of the article to be ground as this wear takes place. To insure the stability and positiveness ol' operation required or" this `feature olE a machine, We provide the following described construction: Extending parallel with the shaft 18 and on opposite sides below it, are two rods 118 oi angular' shape in cross-section, and embracing these rods are tour bearings 119 to which the bearings 21 and 22, h 'einbeiore referred to as supporting the shaft 13, are secured, whereby movement oi the bearings 119 upon the rods 118 likewise moves the shaft 1S and the grii'iding-wheel carrie-d thereby in a longitudinal direction. The pair of bearings 119 at the end or the machine are connected by a web 120 having a threaded bore 121 into which the threaded end 122 ot a shaft 123 iournaled in a cross-bar 124 rigid with the rods 118, is ournaled. The outer end oi the shaft 123 carries pinion 12l1which meshes with a pinion 12- carried on a shaft 126 ournalod in earings 127 on the trame et the machine and carries at its opposite end a hand-wheel 128. lt will be manifest from the foregoing description oi this part ot the machine that the operator may, by turning the wheel 128, move the shalt 18 and wheel 16 upon the rods 118, as adjustment of the wheel with relation to the work-holder is required.

rl'he Water fed to the interior of the wheel 1G through the pipe 16a is caused by the rotation oi the wheel to be thrown outwardly upon its grinding-surface and against the hood covering the Wheel, and to prevent the discharge of water through the opening in the hood tor the work-carrier upon the latter andthe carriage we provide means for returning the Water toward the wheel, the form preferred comprising two horizontallyextending flanges having curved upper surfaces extending inwardly from the hood as represented, a slight distance above the plane of movement of the work-holder. The Water discharged toward the hood thus impinges against these flanges and is deflected toward the Wheel, thereby n'eventing water from being discharged upon the holder or carrier.

1t Will be noted that, by adiustably conneet-ing the arms 107 and 117 with the carrier 31 and adjustably mounting` the block 116 upon the bed 25, the extent of the forward and return movements of the carrier 31 may be regulated for the grinding of articles of different lengths.

From the foregoing description of the machine it is manifest that the parts thereof are so constructed, and cooperate with each other in such a manner, that the operation of the machine is rendered positive and impairment of the machine, to iierform accurate Work, by long continued use is avoided.

TVhat We claim as new, and desire to secure by Letters Patent, is-

1. 1n a grinding-machine, the combination with its frame and a grinding-Wheel journaled thereon, of a reciprocatory Workcarrier, a drive-shaft, and a movable member carrying gears operativelyT connected With said drive-shaft and constructed and arranged to drive said carrier in opposite directions when said member is moved.

2. 1n a grinding-machine, the combination with its frame and a grinding-wheel journaled thereon, of a reciprocatory Workcarrier, a drive-shaft, a rack on said carrier, and a movable member 'carryi ig gears operatively connected with said drive-shaft and rack for driving the carrier in o p posite directions when said member is moved.

3. Ain a grinding-machine, the combination with its frame and a grinding-Wheel journaled thereon, of a reciprocatory Workcarrier, a drive-shaft, a movable member carrying gears operatively connected with said drive-shaft and constructed and arranged to drive said carrier in opposite directions When said member is shifted, and manually-operated means for moving said member, for the purpose set forth.

4. 1n a grinding-machine, the combination With its frame and a grinding-Wheel j-onrnaled thereon, of a reciprocatory Workcarrier, a rack operatively connected With the Work-carrier, a drive-shaft, a pinion engaging with said rack, a gear movable with said pinion, a pinion on said drive-shaft, and a movable member carrying gears and constructed and arranged to be moved to operatively and alternately connect the gears carried therebyivith the pinion on. said driveshaft and with said first-named gear, for the.

purpose set forth.

5. 1n a grinding-machine, the combination with its frame and a grinding-Wheel journaled thereon, of a reciprocatory Wor earrier, a rack operatively connected with the Work-carrier, a drive-shaft carrying a pinion, a pinion engaging said rack, a gear movable with said pinion, a movable member earrying gears and constructed and arranged to be moved to operatively and alterately connect the gears carried thereby with the pinion on said shaft and with said firstnamed gear, and manually-operated meansV for moving said member, for the purpose set forth.

6. 1n a grinding-machine, the combination With its frame and a grinding-Wheel jonrnaled thereon, of a reciprocatory Workoarrier, a drive-shaft, a movable member carrying gears operatively connected with said drive-shaft and constructed and arranged to drive said carrier in opposite directions When said memberis shifted, and a lever operatively connected With said member, for the purpose set forth.

7. 1n a grinding-machine, the combination with its frame and a grinding-Wheel journaled thereon, of a reciprocatory Workcarrier, a drive-shaft, a movable member carrying gears operatively connected With said drive-shaft and constructed and arranged to drive said carrier in opposite directions When said member is shifted, a lever operatively connected with said member for shifting the latter, and means operated by the movement of said Work-carrier for actuating the lever, for the purpose set forth.

8. In a grinding-machine, the combination with its frame and a grinding-Wheel journaled thereon, of a reciprocatory workcarrier, a drive-shaft, a movable member carrying gears operatively connected with said drive-shaft and constructed and arranged to drive said carrier iu opposite directions When said member is moved, and means operated by the movement of said carrier for shifting said member, for the purpose set forth.

9. In a grinding-machine, the combination with its frame and a grinding-Wheel journaled thereon, of a reciprocatory Werlicarrier, drive-shaft, a movable member carrying gears operatively connected with said drive-shaft and constructed and arranged to drive said carrier in opposite directions, When said member is shifted, a springcontrolled lever operatively connected With said member, means for releasably holding said lever in position against the tension of its s rino' in which the 'ears o erate to move the holder in one direction, and means operated by the movement of said carrier for releasing said handle to shift said member and reverse the movement of said Work-carrier, for the purpose set forth.

10. 1n a grinding-machine, the combination with its frame and a grinding-Wheel journaled thereon, of a reciprocatory Workcarrier, a gear and a pinion operatively connected with said carrier in a manner to move the latter during the rotation of said gear and pinion, a drive-shaft, and a movable member carrying gears and a pinion rigid with one of said gears and meshing with the other of the gears carried by said member, one of the gears carried on said member being operatively coniiected with said drive-shaft, said movable member and its gears being so constructed and arranged as to cause the pinion and gear meshing with it on the movable member to alternately engage with said rstnamed pinion and gear, respectively, when the position of said movable member is shifted, for the purpose set forth.

11. In a grinding-machiiie, the combination with its frame and a grinding-wheel journaled thereon, of a bed supported on the machine in a manner to permit it to be moved toward and away from the grindingwheel, a reciprocatory work-carrier mounted on said bed, a member cooperating with said carrier and having limited movement relative thereto, means operatively engaging with said member for reciprocating it and said carrier, and means operated by the movement of said member for swinging the bed, for the purpose set forth.

l2. in a grinding-machine, the combination with its frame and a grinding-wheel j ournaled thereon, of a bed supported on the machine in a manner to permit it to be moved toward and away from the grindingwheel, a reciprocable work-carrier mounted. on said bed, a drive-shaft, a movable member carrying gears operatively connected with said drive-shaft and constructed and arranged to reciprocate said carrier when said member is moved, and means for moving the bed toward and away from the grinding-wheel, for the purpose set forth.

13. In a grinding-machine, the combination with its frame and aI grinding-wheel journaled thereon, of a bed supported on the machine in a inannei to permit it to be moved toward and away from the grindingwheel, a reciprocable work-carrier mounted on said bed, a drive-shaft, a movable member carrying gears operatively connected with said drive-shaft and constructed and arranged to reciprocate said cairiei when said member is moved, and means actuated by the carrier in its movement for moving the bed toward and away from the grindingwheel, for the purpose set forth.

14. In a grinding-machine, the combination with its frame and a grinding-wheel j ournaled thereon, of a bed supported on the machine in a manner to permit it to be moved toward and away from the grindingwheel, a reciprocatoiy work-carrier on said bed, a drive-shaft, a rack operatively connected with said carrier and having limited movement independently thereof, gearmechanism operatively connected with said drive-shaft and constructed and arranged to reciprocate said rack and carrier, and means operated by the movement of said rack for swinging said bed, for the purpose set forth.

15. in a grinding-machine, the combination with its frame and a grinding-wheel j ournaled thereon, of a bed supported on the machine in a manner to permit it to be moved toward and away from the grindingwheel, a reciprocatory work-carrier on said bed, a drive-shaft, a rack operatively connected with said holder and having limited movement independently thereof, gearmechanism connected with said drive-shaft and constructed and arranged to reciprocate said rack and carrier, and lever means operated by the movement of said rack for swinging said bed, for. the purpose set forth.

16. in a grinding-machine, the combina- ,iournaled thereon, of a bed on the frame movable toward and away from the grindingwheel, means tending to move said bed in said bed, a guide adjacent to the bed, a drive-shaft, gear-mechanism operatively connected with said shaft and constructed and arranged to reciprocate said carrier, and means movable with said carrier and engaging with said guide for moving said bed in the opposite direction, for the purpose set forth.

17. in a grinding-machine, the combination with its frame and a grinding-wheel journaied thereon, of a bed on the frame movabie toward and away from the grindingwheel, means tending to move said bed in one direction, a work-carrier reciprocabie on said bed, a guide adjacent to said bed, a driveshaft, a member cooperating with said cai'- riei' and having limited movement relative thereto, means operatively connected with said drive-shaft and with said member for reciprocating the iatter and the carrier, and means movable with said carrier and bearing against said guide operated by the movement of said member for moving the bed in the opposite direction, for the purpose set forth. l

18. In a grinding-machine, the combination with its frame and a grinding-wheel iournaied thereon, of a bed on the frame movable toward and away from the grindingwheel, a work-carrier reciprocable on said bed, a member operatively connected with said carrier and having limited movement relative thereto, a guide adjacent to said bed, a lever fulcrumed on said carrier having connection near one end with said membei and bearing at its opposite end against said guide,

srtructed and arranged to reciprocate said member in opposite directions for moving said member, holder and lever, for the purpose set forth.

19. ln a grinding-machine, the combination with its frame and a grinding-wheel one direction, a work-carrier reciprocable onV and means operated by said drive-shaft con- Cgi crank lever iulcrumed between its ends onsaid carrier and connected near one of its ends with an end-portion or" said rack and at its opposite end carrying a rolier, a guide against which said roller is adaptedto oonstantly bear under the action of said iii-stnamed means, a drive-shaft, and means operated by said drive-shaft for moving` aid rack in opposite directions, tor the purpose set forth.

20. in a grinding-machine, the combination with its frame and a grinding-wiieel iournaled thereon, of a bed supported on the frame in a manner to permit 1t to be moved toward and away from the grinding-wheel a Work-carrier reciprocably mounted on said bed, a member carried by said carrier and haviirg limited movement relative thereto, a drive-shaft, lever-controlled means for communicating power Afrom said drive-shaft to said member to reciprocate it, means l'or swinging said bed with relation to the grinding-wheel operated through the movement of said member, means carried by said workcarrier for automatically actuating said lever to reverse the movement of said member when the holder reaches a predetermined point in its forward movement, and means for actuating said lever to disconnect the means controlled thereby from said member when the work-carrier reaches a predetermined point in its return movement.

21. ln a grinding-machine, the combination with its frame and a grinding-wheel journaled thereon, of a bed pivotally mounted near one end to said frame, a spring connecting the other end of said bed with the frame and tendine to swing said bed relative to the gi'inding-Wneei, guide adjacent to said bed, a work-carrier reciprocably mounted on said bed, a rack operatively connected with said carrier and having limited. movement relative thereto, a bell-crank lever fulcrumed between its ends on said carrier and operatively connected near one of its ends with an end-portion of said rack, and carrying a roller at its op osite end adapted to bear against said guite under the action of said spring, a shaft journaled on said carrier and provided with a pinion at one end engaging said rack, and a second pinion near its opposite end, a drive-shaft carrying a pinion, a movable member carrying gears operatively connected with the pinion on said drive-shaft, said gears rotating in opposite directions and adapted to alternately engage with said second pinion by moving said member, a

'ilL i manner to adapt it to be moved with r:Y

lever connected with said member for moving the latter, and means carried by said carrier for alternately engaging with said lastnamed lever, for the purpose set forth.

22. Vin a grinding-machine, the combination oi its trame and a grinding-wheel journaled thereon a bed supported on the frame in a manner to adact it to be moved with reiationto the grinding-wheel, a work-carrier re iproeably mounted on said bed, a memh-er carried by said carrier and having limited movement relative thereto, means operated by the move' ient of said memberfor shifting said bed during the initial movement oi said member, means for reciprocating said member, and means for positiv pre `renting reciprocation of said carrier during the operation of said bed-moving` means.

23. ln a grinding-machine, the combiiiation of its frame and a grinding-wheel journaled thereon, a bed supported on the frame lation to the grinding-wheel, a work-carrier reciprocably mounted on said bed, a member carried by said carrier and having limited movement relative thereto, means operated by the movement of said member for shifting said bed during the initial move- .ment of said member, means for reciprocating said member, and a catch-device constructed and arranged to engage with said bed during the operation of said bed-moving means and be released from engagement therewith upon the conclusion of such movement, for the purpose set forth.

24. ln a grinding-machine, the combination with its frame and a grinding-Wheel journaled thereon, a bed supported on the machine in a manner to permit it to be moved relative to the grinding-wheel, a work-carrier reciprocably mounted on said bed, a member operatively connected with said carrier and having limited movement relative thereto, means operated by the movement of said member for moving said bed during the initial movement of said member, means for reciprocating said member, a catch-device on said carrier, means on said bed adapted to engage with said catchdevice at the limit of' movement of said carrier in one direction, whereby the movement of said carrier is prevented during the operation of said bed-moving means, and means operated by the movement of said bedmoving means for disengaging said catch from the bed at the conclusion of the operation of said last-referred to means.

25. ln a grinding-machine, the combination with its frame and a grinding-wheel journaled thereon, of a bed supported on the machine in a manner to permit it to be moved toward and away from the grindingwheel, a Work-carrier reciprocably mounted on said bed, a movable member operatively connected with said carrier and having limited movement relative thereto, a guide adjacent to said carrier, a lever pivotallv connected with said carrier and connected with said member and hearing at a portion thereof against said guide, means for holding,y said lever against the guide during the movements of said Work-carrier, rnems for reciprocating said. member, a catch-device on said carrier, Lacuna on said bed arlzwted to he engaged by said catcl1-device a t the limit of the movement of said carrier in one direction, and means adapted to be engaged hy said lever for-,releasing said catch from the hed at the conclusion of the movement of said l ver relative to said holder, for the purpose set forth.

26. ln a grinding-maclnne, the combination with its fragne and a grinding-Wheel journaled thereon, of a hed supported on the machine in a manner to permit it to be moved toward and away .from the grinding- Wheel, Work-carrier reCiprocalL-ljvv mountedon said hed, means for reciprocating the carrier, means for noving the 1oed With relation to the grinding Wheel, a catch-device on the carrier comprising a pivoted catch and a lever operaivel,T engagi gf; it, means on said bed for engagirnr With said catch, and means operated hv said bed-moving means for en- With said lever, for the purpose set forth.

27. ln a grinding-machine, the combination of a pluralitT of parallel rods of angular shape in cross-section, a bearing-frame slide ablyr mounted on said rods, a shaft carrying a grinding-Wheel journaled in said bearing frame, and means for sliding' said frame upon said rods, for the purpose set forth.

ln a grinding-niachine, the combina-` tion With its frame, of a plurality of rods of angular shape in cross-section, a hearingframe slidahle on said rods, a shaft jour- .naled in said frame and carrying a grinding- Wheel, a rotary shaft having threaded connection with said bearing-frame, and means for rotating said shaft, for the purpose set forth.

29. In a hiding-machine, the combination with its frame, of plurality of parallel rods of angular shape in cross-section, a hearing-frame slidable on said rods, a shaft journaled in said frame and carrying a grinding Wheel, a rotar)T shaft having threaded connection at one end with said hearing-frame and. provided With a gear at its opposite end, and a second shaft journaled on the machine and provided at one end With a gear meshing with said firstnamed gear and at its other end With a hand- Wheel, for the purpose set forth.

lLLIAlvl J. BASTIAN, FRANK GRANTZ.

ln presence ofr/ B. DAvins, R.' A. Soi-IAEFER.l

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