US956645A - Machine for grinding cutlery-blades and the like. - Google Patents

Description

T. R. MOORE. MACHINE FOR GRINDING GUTLERY BLADES AND THE LIKE APPLICATION FILED NOV. 2, 1908. 95 545 Patented May 3, 1910.

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T. R. MOORE.

MAGHINE FOR GRINDING GUTLERY BLADES AND THE LIKE.

APPLICATION I'ILED NOV. 2, 1908.

Patented May 3, 1910.

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WITNESSES:

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UNITED STATES PATENT oEEioE.

'lI-IOI/IAS RI. MOORE, 0F WALDEN, NEW YORK.

MACHINE FOR GRINDING CUTLERY-BLADES AND THE LIKE.

To all whom it may concern:

Be it known that I, THOMAS E. MOORE, a citizen of the United States, and a resident, of Walden, in the county of Orange and State of New York, have invented certain new and useful Improvements in Machines for Grinding Cutlery-Blades and the Like, of which the following is a specification.

The invention relates to improvements in machines for grinding cutlery-blades and the like, and it consist-s in the novel features, arrangements and combinations of parts hereinafter described, and particularly pointed out in the claims.

My invention comprises certain improvements on the machine made the subject of Letters Patent of the United States No.

813,510 granted February 27, 1906, to Thomas R. Moore.

In my present machine I employ two grinding ring-wheels, as before, but cause theirv grinding surfaces to face outwardly in opposite directions instead of inwardly toward each other, and at the outer side of each wheel I provide a carriage adapted to carry the parts having to do with the support of the blade-blank and its proper presentation to the grinding surface of the wheel and which parts embrace novel features of construction and operation constituting portions of the present invention.

My invention also embraces novel means for efi'ecting, from a source of power, the initial application of the blade-blanks to the grinding wheels and the forward travel of the carriages whereby the said blanks are moved along said wheels.

A further feature of the present invention resides in novel means for controlling the proper shaping of the blades and enabling various adjustments whereby the machine is enabled to impart such finish or shape to both the edge and back of the blades as may be required.

The invention will be fully understood from the detailed description hereinafter presented, reference being had to the accompanying drawings, in which:

Figure 1 is a front end elevation of a machine constructed in accordance with and embodying my invention; Fig. 2 is a top view of the same; Fig. 3 is a detached face view of one of the blade-blank holders and illustrates a blade-blank held in position Specification of Letters Patent.

Application filed November 2, 1908.

Patented May 3, 1910.

Serial No. 460,566.

thereon; Fig. 4 is a vertical transverse section on the dotted line 4l4 of Fig. 6, through one of the two corresponding traveling carriages and connected parts by which the blade-blanks are carried along the grinding ring-wheels; Fig. 5 is an enlarged side elevation, taken from the right hand side of Fig. 2, of the complete machine; Fig. 6 is a detached top view of one of the traveling carriages and its cooperating parts; Fig. 7 is a vertical longitudinal section, on the dotted line 77 of Fig. 6, through a portion of the traveling carriage and its supporting and guiding base and is presented to illustrate the spring catch by which the carriage is yieldingly held in its initial inner position; Fig. 8 is a detached end view, partly broken away, taken from the left hand end of Fig. 6, of the traveling carriage and parts carried thereby; Fig. 9 is adetached end view, taken from the right hand end of Figs. 5 and 6, of a clip for connecting certain rods of the machine rig-idly together; Fig. 10 is an enlarged detached top view of one of the formers employed for controlling the shaping of the blades; Fig. 11 is a detached top view of a portion of one of the carriages and illustrates a modified means for effecting the initial movement of the blade-blank toward the grinding wheel; Fig. 1-2 is a vertical longi tudinal section of the same on the dotted line 1212 ofFig. 11, and Fig. 13 is a detached end view of a pivoted arm forming a portion of the same.

In the drawings. 20 designates a suitable supporting frame for the operative parts of the machine, and 21 the grinding wheels which are secured on the ends of a transverse shaft 22 and have their rings 23 of abrasive substance faced outwardly in opposite directions. The shaft 22 is mounted in suitable bearings 24: and provided at its center with a drive-wheel 25 to which power may be applied from any suitable source for rotating said shaft and the grinding wheels 21.

At the outer side of each grinding wheel 21 is a set of mechanism for supporting a blade-blank and presenting it to and moving it along the rotating grinding wheel and also means for controlling the action of the wheel on the blank, and these two sets of mechanisms are duplicates of each other except that one is arranged to present a blade-blank to and carry it along a grinding-ring facing the right while the other is arranged to present its blade-blank to and move it along a grinding-ring which faces the left. Each set of these mechanisms comprises a stationary longitudinal base-bar26, a carriage 27 mounted to travel thereon, alatcrally movable bar 28 mounted on said carriage, a blade-blank holder 29 supported on the inner vertical face of said bar 28, upper and lower formers 30, 31 on said bar a. stationary post 32 on said base-bar 26 along and against which said formers are compelled to move, a spring 33 whose tension is exerted to draw the bar 28 in a direc tion from the grinding wheel and press the said formers 30, 31 against said post 32, and a pivoted arm 3% on the carriage 27 and pivotally connected with the bar 28 and which arm is employed, in connection with actuating means, for moving the bar 28 and its bladeblanl; holder 29 in a direction toward the grinding wheel for initially presenting the blade-blank thereto under requisite pressure and then maintaining the blank against said wheel during the forward travel of the carriage 27 along the wheel and on the base-bar 2G.

The base-bars 26 are provided with fshapec grooves transversely of their lower surfaces to rest upon and engage J-shaped guides 38 formed on the base-frame 20, and while said base-bars 26 are normally stationary they are adjustable on said guides 36 toward and from the grinding wheels 21 so that they may be set and maintained in proper relation to said wheels. I provide the main supporting frame 20 with set screws 37 by which the base-bars 26 may be set in proper relation to the grinding wheels 21. The base-bars 26 may be secured in any set position to which they may be placed by means of angle-iron clamps 38 and bolts as shown by dotted lines in Fig. 5, the upper threaded ends of said bolts 39 being carried by the base-bars 26 and the heads of said bolts carrying the angle iron clamps lYhen the bolts 39 are loosened the bars 26 may be moved on the guides 36 and when said have attained their correct position they may be there secured by the tightening of the bolts this having the effect of causing the toe portions L0 of the clamps 38 to bind against the ribs t1 formed integrally with the end of the supporting frame 20. One clamp 38 is sufficient for each base-bar 26.

The upper por ion of each base-bar 2G is in the form of a longitudinal dove-tail, as shown in Fi i, l and 8, to receive, securely hold and guide the carriage 27, which is in the form of a bar of about the width of the base-bar 26 but materially shorter than said base-bar, as indicated in Fig. 6. The carriage 27 is shown in Fig. 6 in its initial operative position, this being the position the carriage has at the time the blade-blank is to be presented against the grinding ring. I

provide the base-bar 26 with an adjustable 1 stop 4:2 to define the initial position of the carriage 27, said carriage on each inward movement or in a direction toward the right, looking at Figs. 5 and (S, passing into contact with and becoming arrested by the stop l2. The stop l2 is made adjustable so that the position of the carriage may be set to meet the varying conditions of blade-blanks and secure the proper and correct formation of the shoulder at the tang portion thereof. \V hen the carriage 27 is in position against the stop .it is there yieldingly locked by means of a spring latch d3 (Figs. 6 and 7 which on gages a shoulder furnished by a recess ft in the lower side of the end of the carriage. The blade-blanks are presented to the grinding wheels by a lateral movement of the bars 28 and holders 29 before the carriages 27 start to move forwardly, and in order to hold the carriages 27 against longitudinal movement during said lateral presentation of the blade-blanks to the grinding wheels I provide each carriage with a latch 43- which automatically locks the carriage at its initial position and retains said carriage until sufficient longitudinal pressure has been exerted against the same to overcome the resistance of the latch 43 and cause the latter to release the carriage, the latter then moving longitudinally to carry the bladeblank along the grinding ring. The spring latch a3 is adjustable by means of the screw 45 and slot in the spring through which said bolt passes, and this adjustment is provided for enabling the stop 42 and springlatch 43 to be correspondingly set so that whenever the carriage is moved against the stop 42, the latch &3 will automatically ongage and lock the same. 2

Each bar 28 is mounted on the inner portion of its carriage 27 and extends beyond the front end of the same, and each bar 28 is substantially rectangular in cross-section, as shown in Fig. 4-, but at. its lower surface where it rests on the carriage 27 said bar is of angular or curved formation, as shown in Fig. 4, so that it may, at the proper time, have a rolling movement on said carriage for insuring the proper action of the grinding ring against the blade-blank. The bar 28 may have a limited lateral movement on the carriage 27 and a slight rolling movement thereon, but otherwise said bar 28 is rigid with the carriage 27 and moves longitudinally with the same. The bar 28 has connected with it the spring 33 which is always under tension and connected at its outer end by means of a screw it and post 47 with the carriage 27. The spring exerts its tension to draw the bar 28 and its bladeblank holder 29 in a lateral direction outwardly from the adjacent grinding wheel, but is restrained from unduly moving the bar 28 by the engagement of the formers 30, 31 at the front end of said bar with the post secured to the basebar 26 and also by the engagement of the arm 34 at the rear end of the carriage 27 with the head 48 formed on the front end of a short actuating rod 49.

The arm 34 is secured by a vertical pivot screw 50 to the carriage 27 and is formed with a spherical socket to receive a ball 51 which projects rearwardly from the bar 28 and is adapted to have an angular turning action in said socket both during any rocking motion of the bar 28 and also during the lateral movement of said bar in a direction toward or from the grinding wheel. The arm 34, shown in Fig. 6, has an outwardly and frontwardly inclined outer edge which constitutes a cam against which the head 48 on the rod 49 acts, and the spring 33 acting through the bar 28 keeps the inclined or cam edge of the arm 34 against said head 48. During the first part of the operation of the machine the head 48 slides forwardly against the arm 34 before the carriage 27 commences to move, and this is for the purpose of causing through the arm 34 the movement of the bar 28 toward the grinding ring with sufficient pressure and during a sufficient duration to enable said ring to make its first cut into the blade-blank at the tang end of the latter, after which the head 48, arm 34 and bar 28 all move forwardly together with the carriage 27, thereby carrying the blade-blank along the grinding wheel to complete the grinding of said blank. The spring latch 43 holds the carriage 27 stationary while the head 48 of the rod 49 moves against the inclined edge of the arm 34 and acts through the bar 28 to initially press the blade-blank against the grinding wheel, and thereafter, in the manner hereinafter explained, the driving mechanism forces the carriage 27 along the basebar 26, said driving mechanism exerting sufficient force to compel the carriage to depress and ride over the spring latch 43.

To the front end portion of the bar 28 are secured the formers 30, 31 on a vertical screw 52 which extends downwardly through the bar 28 and holds the former 30 upon the upper surface of said bar and the former 31 against the lower surface of said bar. The upper former 30 is, in the example illustrated in the drawings, formed with a straight edge 53 for a portion of its length and then a deflected or cam edge 54 for another port-ion of its length. The inner edges of the formers 30, 31 control the shape of the blade and during the forward travel of the carriage 27 move against the rigid post 32 to set the blade-blank with relation to the grinding wheel. The bar 28 is equipped with adjusting screws 55, 56 for the formers 30, 31, so that said formers may be initially set in any requisite position, the screws 55 being loosened or screwed outwardly from their threaded receiving lugs 57 when it is desired to move the screws 56 inwardly. The upper former 30 is preferably formed with a hole 58 (Fig. 10) greater in diameter than the bolt 52 passing through it, and this is to enable a primary adjustment of said former bodily toward or from the post 32 in accordance with the shape of the blade desired and such conditions as may arise. The top washer on the bolt 52 will cover the hole 58 in the former 30 and thus enable the bolt to secure the former upon the bar 28.

The blade-blank holder 29 is illustrated more clearly in Figs. 2, 3, 4 and 6 and consists of a metal plate fastened by pins to the inner face of the bar. 28 and having pins 59 for supporting the bladeblank 35 and a stud 60 for engaging the shoulder formed at the tang of the blade and known as the kick of the blade, as shown in Fig. 3. In addition I provide each blade-blank holder 29 with a leaf spring 61 and an eccentric bar 62 which is pivotally secured and adapted at its eccentric end to engage and press the free end of the spring 61 against the front edge of the tang of the blade-blank. In Fig. 3 I illustrate the. bar 62 as having been turned against the spring 61 to cause the latter to press against and aid in securing the blade-blank in position. When it is desired to release the blade-blank 35 the bar 62 may be turned in a reverse direction (or toward the right, looking at Fig. 3), to permit the spring 61 to free itself from the tang of the blade-blank, whereupon said blank may be moved outwardly from the pins 59 and stud 60.

The forward motion of the rod 49 will carry its head 48 against the arm 34 and eii'ect the lateral movement of the bar 28 and blade-blank holder 29 toward the grinding wheel, and the onward travel of the carriage 27 which succeeds the movement of the bar 28 toward the grinding wheel is effected from power mechanism whose motion is transmitted to a longitudinal rod 63 eX- tending freely through the base-bar 26, a rod 64 which is connected by a clip 65 with the rod 63 and the rod 49 which is connected by a clip 66 with the rod 64. The driving power for each set of the blade blank carrying mechanisms is communicated by a chain 67 to the clip 65 and through the said clip and rod 64 to the clip 66 and rod 49. hen the rods 63, 64, 49 move forwardly or toward the left from the position shown in Fig. 5, the rod 63 slides freely through a long hole in the base bar 26 and at that time performs no special duty, while the rod 64 causes the clip 66 and rod 49 to move forwardly without at first performing any duty other than to cause the head 48 on the said rod 49 to turn the arm 34 laterally and thereby, through the bar 28, cause the blade-blank to be pressed against the grinding wheel so that the latter may make the requisite initial cut into said blank at the tang end of the latter, after which the forward end of the rod 64 then having passed into engagement with the rear end of the carriage 27, will effect the forward travel of said carriage with the head 48 pressed against the cam edge of the arm 34 but having no movement independent of the earriage. The rod 49 thus performs an initial forward mov ment against the arm 34 to move the bar 28 laterally, and thereafter the rod 49, arm 34, bar 28 and carriage 27, have a uniform forward travel to carry the bladeblank along the grinding ring.

Each set of the blade-blank carrying mechanisms is equipped with the rods 63, 64, 4t, and each set of these rods is actuated on their forward travel by means of a chain 67 which is secured to a plain chain-wheel G8 keyed on a transverse shaft 69 which is driven from a power worm shaft 7 0 through a worm wheel 71, the worm 72 connected therewith, and a worm wheel 73 secured on the shaft 69.

I provide means for cutting off the power of the worm 72 from the shaft 69 at the moment the blade blanks have traveled forwardly beyond the grinding rings and are to be removed from their holders 29, and these means comprise a tripping mechanism consisting of a pin 74 fastened to the side of the worm wheel 73 and a pivoted bar 75 against the rear end of which said pin will strike at the time the blade blanks are beyond the grinding wheels and by pressing downwardly against the same cause the front end of said bar to elevate from a stop 76 on a vertical arm of a bell crank lever 77, thereby enabling the other arm of said bell crank lever to lower and carry the worm 72 downwardly from the worm wheel 73, thus cutting off the power from the shaft 69 and permitting the carriages 27 to come to a stop. hen the trip bar 75 is relieved from the stop 76 on the arm of the bell crank lever 77, the weight of the worm 72 assisted by the spring 7 8 on the resetting rod 79 will cause said worm to descend from the worm wheel 73. The mechanism for cutting off the power from the shaft 69 and comprising the bell crank lever 77, trip bar 7 worm 72 and wheel 73 having the pin 74, are of substantially the same character and construction as like means disclosed in my aforesaid Letters Patent No. 813,510 for accomplishing the same result, and said features are not, therefore, separately claimed herein. The worm 72 may, after the rods 63, (34, 49 have been returned manually to their rear position, be restored to its engagement with the worm wheel 73 by means of a resetting rod 79, which on being pulled frontwardly will turn the bell crank 77 to elevate the worm 72 into reengagement with said wheel 73, and thereupon the trip bar 75 will descend by gravity to reengage the stop 76 on said bell crank lever. In my aforesaid patent is also shown a resetting rod for restoring the worm into engagement with the worm wheel. After the carriages 27 and parts connected with them have reached the end of their forward travel and carried the blade-blanks beyond the grinding rings and power is automatically cut off from the shaft 69 and chain wheels 68 as above described, the operator, after attending to the blade-blanks as hereinafter explained, Will by taking hold of the handles at the exposed front ends of the rods 63, push said rods and the parts connected with them rearwardly to the position in which the mechanism is shown in Figs. 5 and (3, the rods (33 reversing the movement of the wheels 68 and drawing the chains 67 taut, and the rods 64 drawing rearwardly on the clips 66 and acting to draw the rods 49 rearwardly and enable the heads 48 on said rods to rccede along the arms 34 and engage the bearings 80 through vhich said rods pass and thereby draw the carriages and all the parts mounted on them to their rear position, the springs 33 as the heads 48 recede rearwardly along the arms 34, drawing the bars 28 and blade-blank holders 29 laterally in a direction from the grinding rings. It is not necessary that the operator push both rods 63 rearwardly at the same time, since it may not be convenientto do so and since the presence of the chains 67 enable each rod alone to be pushed rearwardly. If one rod 63 is pushed rearwardly alone it will draw its chain 67 taut and rotate the chain wheels 68 upwardly and toward the rear, but the only effect this will have on the other chain 67 for the rod (53 still in its forward position, will be to loop said chain at the rear of its wheel, leaving it to be drawn taut when the rod 63 is pushed rear *ardly. After the blade-blanks have been properly applied to the holders 29 and the carriages 27 with the parts connected with them have been moved to their inner or rear position, by the operator pushing rearwardly on the rods 63, the operators will pull forwardly on the rod 79 for restoring the worm 72 in engagement with the worm-wheel 73, and thereupon the rods 63, 64, 49 will move forwardlv as before, the rods 49 first acting against the arms 34 and the rods (34 then acting against the carriages 27 to drive them and the parts connected with them forwardly on the basebars 26.

In Figs. 11 12, 13 I present a modified connection of the rod 49 with the arm 34 and therein illustrate the use of a link 81 connecting said arm and rod in lieu of employing the head 48 on the rod to turn the arm 34 laterally. The head 48 of Fig. 6 and the link 80 of Fig. 11 perform corresponding duties and the two constructions are shown to indicate that the invention is not confined to any special form of means for enabling the rod 49 to establish a connection, when moved forwardly, with the pivoted arm 34.

In the use of the machine two bladeblanks are carried through the machine at each operation thereof and at the end of each operation I remove the blank from one, say the left hand holder 29, and place it upon the other or right hand holder 29 and place a fresh blank upon the said left hand holder 29, the side of the thus transposed blank which was ground by one of the grinding rings being placed against its holder so that the other side may be exposed and ground by the other grinding ring by the next operation of the machine, whereby at the end of each operation after the first one, one blade will have been completely ground and be removed from the machine.

The operation of the machine will be substantially understood from the description hereinbefore presented, and hence but a brief further explanation will be required.

In Figs. 2, 5 and 6 I illustrate the car'- riages 27 and their parts in their initial position with the blade-blanks 35 held by the holders 29 and ready to be presented to the grinding rings. The power mechanism is illustrated in Figs. 2 and 5 as having been set for imparting motion through the worm 72, worm-wheel 73, shaft 69, chain-wheels 68 and chains 67 to the rods 63, 64 and 49, and under this condition of the parts of the machine, power having been applied to the grinding wheels and to the drive worm 70, the said rods 63, 64, 49 will start forwardly, all of said rods at first moving indepenclently of the carriages 27 through the distance permitted by the space between the forward ends of the rods 64 and the rear ends of said carriages or until said ends of said rods 64 engage said carriages for driving them forwardly. The function performed during the movement of the rods 63, 64, 49 independently of the carriages is the forcing laterally of the arms 34 by the heads 48 on said rods 49 for the purpose of moving, through the bars 28, the bladeblanks 35 directly against the grindingrings. During this portion of the operation of the machine each grinding ring initially cuts a groove in the blade-blank it engages adjacent to the tang portion thereof, this groove extending transversely of the blank and defining the tang. Thereafter as the rods 64 drive the carrlages 27 away the edge walls of the grooves, while the faces of the ring grind the face of the blade-blanks left by the widening of said grooves. When the carriages 27 have reached the predetermined limit of their forward movement, exposing the bladeblanks beyond the grinding wheels, the pin 74 on the worm wheel 73 trips the latch bar 75 and the power becomes cut off from said carriages. The operator then removes the finished blade from, say, the right hand holder 29 and the half-finished blade from the left hand holder 29, placing the latter blade on the right hand holder and a new blank on the left hand holder, and he thereupon will push on the rods 63 to restore said rods and the carriages and the parts connected with them to their initial position, shown in Figs. 2, 5 and 6, whereby the blanks thus applied to the holders 29 are carried into proper relation to the grinding rings to be presented to them. The operator will after the carriages have been re stored to their inner or rear position, pull on the rod 7 9 for resetting the drive mechanism, and thereupon the rods 63, 64, 49 will start forwardly as before, the rods 49 pressing the arms 34 laterally to cause the blade-blanks to be applied to the grinding rings so that the latter.while said blanks are otherwise stationary may cut the initial grooves in the same and the rods 64 thereafter pushing the carriages forwardly to carry the blade blanks along said rings. The formers 30, 31 will be adjusted in accordance with the taper or shape to be imparted to the blades, the upper former defining the shape of the edge of the blade and the lower former controlling the shape of the back of the blade.

The fact that the bars 28 may have an angular or rolling motion t oward the grinding rings under the action of the formers against the posts 32, is of importance in the shaping of the blades. In the formation of the point of the blade illustrated in Fig. 3 the bars 28 turn or roll in a direction toward the grinding rings, so as to secure the proper formation of said edges. The lower formers 31 while usually provided with straight edges may be varied in shape in accordance with the shape of the blade desired and said formers though having straight edges may be adjusted by meansof the screws 55, 56 provided for them to 1nsure a tapered formation to the back of the blade.

I do not limit my invention to the special outlines of formers 30, 31 shown, since they are used to define the shape of the blades and will vary in accordance with the shapes it is desired to impart to the blade-blanks.

What I claim as my invention and desire to secure by Letters-Patent, is:

1. in a machine for grinding blades, a grinding ring, a carriage having aholder for the blade-blank, means for pressing said holder to hold the blank against said ring until the latter has cutinto the blank to sullicient depth, means for then moving said arriage and holder to carry said blank along said ring to complete the grinding, adjustable means for controlling the finish to be imparted to the blade at its edge, and independently adjustable means for controlling the finish to be imparted to the blade at its back; substantially set forth.

In a machine for grinding blades, a grinding ring, a carriage having a holder for the blade-blank, means for pressing said holder to hold the blank against said ring until the latter has cut into the blank to sui int depth, means for then movin said carriage and holder to carry said blank along said ring to complete the grinding, a former carried by the carriage for controlling the finish to be imparted to the blade at its back, means for adjusting said former, and a stationary par against- Wnich said former mores for efi'ecting its movement and that of the blade-blanr; substantially as set forth.

in a machine for grinding blades, a grinding ring, a carriage at the side there of, a bar on said carriage having means for holding the bladeblank, a transverse spring connected with said bar and Whose tension is exerted to draw the bar in a direction from said ring, means for resisting the lateral movement of said bar at its forvvard end in a direction from said ring, a pivoted arm on the carriage hinged to the other end of said bar, means for controlling the initial position of said arm, and Clll" ing mechanism for first acting on said arm to move said bar to present the blade-blank 0 said ring and then etlecting the travel of carriage for moving the blank along ring to complete the grinding; substantially as set forth.

w as 5. in a machine for grinding blades, a.

esaeas grinding ring, a carriage having a holder for the blade-blank, means for pressing said holder to hold the blank against said ring until the latter has cut into the blank to sufiicient depth, and means for then moving said carriage and holder to carry said blank along said ring to complete the grinding, said holder having means for supporting the blade-blank at its back, a stud for engaging the same at its kick and means for locking the same at its tang; substantially as set forth.

6. In a machine for grinding blades, a grinding ring, a carriage having a holder for the blade-blank, means for pressing said holder to hold the blank against said ring until the latter has cut into the blank to sufiicient depth, and means for then moving said carriage and holder to carry said blank along said ring to complete the grinding, said holder having means for supporting the blade-blank at its back, a stud for engaging the same at its kick and means for locking the same at its tan comprising a spring to engage the edge of the tang and a manually operative eccentric for locking said spring against the tang; substantially as set forth.

7. In a machine for grinding blades, a grinding ring, a carriage having a holder for the bladeblank, means for pressing said holder to hold the blank against said ring until the latter has cut into the blank to sufiicient depth, means for then moving said carriage and holder to carry said blank along said ring to complete the grinding, a stop defining the initial operative position of the carriage and a spring latch for yieldingly securing said carriage in its said position; substantially as set forth.

8. in a machine for grinding blades, a grinding ring, a carriage having a holder for the blade-blank, means for pressing said holder to hold the blank against said ring until the latter has cut into the blank to sufficient depth, means for then moving said carriage and holder to carry said blank along said ring to complete the grinding, a stop defining the initial operative position of the carriage and a spring latch for yieldingly securing said carriage in its said position, said stop and spring latch both being adjustable; substantially as set forth.

9. In a machine for grinding blades, a grinding ring, a carriage at the side thereof, a bar on said carriage having 11111115 for holding a blade-blank, a tlflllSYOlSt-B spring connected with said bar and Whose tension is exerted to draw the bar in a direction from said ring, means for resisting the lateral movement of said bar at one end in a direction from said ring, a pivoted arm on the carriage hinged to the other end of said bar, means for controlling the initial position of said arm, driving mechanism for first acting on said arm to move said bar to present the blade-blank to said ring and then efiecting the travel of said carriage for moving the blank along the ring to complete the grinding, and formers carried by said bar for controlling the finish to be imparted to the blade, said bar being mounted to turn angularly under the influence of said formers for properly presenting the blade-blank to said ring during the travel of the carriage; substantially as set forth.

10. In a machine for grinding blades, a grinding ring, a carriage at the side thereof, a bar on said carriage having means for holding a blade-blank, a transverse spring connected with said bar and whose tension is exerted to draw the bar in a direction from said ring, means for resisting the lat eral movement of said bar at one end in a direction from said ring, a pivoted arm on the carriage hinged to the other end of said bar by a ball and socket connection whereby said bar may have a lateral hinged movement and an angular or rocking movement, means for controlling the initial position of said arm, driving mechanism for first acting on said arm to move said bar to present the blade-blank to said ring and then effecting the travel of said carriage for moving the blank along the ring to complete the grinding, and formers carried by said bar for controlling the finish to be imparted to the blade; substantially as set forth.

11. In a machine for grinding blades, a grinding ring, a carriage at the side thereof, a bar on said carriage having means for holding a blade-blank, a transverse spring connected with said bar and whose tension is exerted to draw the bar in a direction from said ring, means for resisting the lateral movement of said bar at one end in a direction from said ring, a pivoted arm on the carriage hinged to the other end of said bar, and driving mechanism for first acting on said arm to move said bar to present the bladeblank to said ring and then effecting the travel of said carriage for moving the blank along the ring to complete the grinding, said driving mechanism comprising a rod (49) to act against said arm, a rod (64) to thereafter engage and move said carriage and means for imparting motion to said rods; substantially as set forth.

12. In a machine for grinding blades, a grinding ring, a carriage at the side thereof, a bar on said carriage having means for holding a blade-blank, a transverse spring connected with said bar and whose tension is exerted to draw the bar in a direction from said ring, means for resisting the lateral movement of said bar at one end in a direction from said ring, a pivoted arm on the carriage hinged to the other end of said bar, and driving mechanism for first acting on said arm to move said bar to present the blade-blank to said ring and then effecting the travel of said carriage for moving the blank along the ring to complete the grind ing, said driving mechanism comprising a rod (49) to act against said arm, a rod (6 1) to thereafter engage and move said carriage, a rod (63) connected with said rod 64: and extending to the forward end of the machine, a shaft having a chain-wheel thereon, a chain connected with said wheel and rod 68, means for imparting motion to said shaft for winding said chain on said wheel, and means for automatically cutting off power from said shaft after the blade has been ground; substantially as set forth.

13. In a machine for grinding blades, a grinding ring, a normally stationary basebar at the side thereof, a frame supporting said base-bar, means for adjusting said basebar with relation to said ring, means for securing said base-bar in its adjusted position, a carriage mounted to travel on said basebar, a bar on said carriage having means for holding the blade-blank, a transverse spring connected with said bar and whose tension is exerted to draw the bar in a direction from said ring, means for resisting the lateral movement of said bar at its forward end in a direction from said ring, a pivoted arm on the carriage hinged to the other end of said bar, means for controlling the initial position of said arm, and driving mechanism for first acting on said arm to move said bar to present the blade-blank to said ring and then effecting the travel of said carriage for moving the blank along the ring to complete the grinding; substantially as set forth.

1 1. In a machine for grinding blades, a transverse driving shaft having on its ends grinding rings faced outwardly in opposite directions, a carriage at the outer side of each of said rings, a bar on each carriage having means for holding a blade-blank, transverse springs connected with said bars and whose tensions are exerted to draw the bars in a direction from the adjacent rings, means resisting the lateral movement of the bars at one end in a direction from said rings, pivoted arms on the carriages hinged to the other ends of said bars, and driving mechanism for first acting on said arms to move said bars to present the blade-blanks to said rings and then effecting the travel of said carriages for moving the blanks along said rings to complete the grinding, said driving mechanism comprising rods 19 to act against said arms, rods 64: to thereafter engage and move said carriages, rods 63 connected with said rods 64 and extending to the forward end of the machine, a shaft having chain-wheels thereon, chains connected with said wheels and rods 63, driving gear for imparting motion to said shaft for winding said chains on said wheels, and means for automatically disconnecting said gear after the blade-blanks have been ground, Orange, and State of New York, this 28th leaving said shaft and chain Wheels free, day of October A. D. 1908.

whereby the carriages may be separately re- THOMAS R MOORE, turned to their initial operative position; it 5 substantially as set forth. EARL L. ROWLAND,

Signed at- Vaiden, in the county of J. P. KIMBALL.

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