US708136A - Stop-motion for cutlery-grinding machines. - Google Patents

Description

Patented Sept. 2, |902.

y A.e'o.u|.n; STO? IUTIUN FOB-GUTLERY Gl-HNDING MACHINES.

(App'liutidn Bled Tan- 10, 1902.)

2 Sheets-Sheet 2.

(In Model.)

w/T/vEssEs I Q A TTY.

y ly/ n i UNITED STATES PATENT OFFICE.

AUGUSTUS COULD, CE NoRwICH,.CoNNECTICUT, AssIeNoR To WILLIAM A. BREED, CE NoRwICI-I, CONNECTICUT.

STOP-MOTION FCR CUTLERY-GRINDING MACH|NEs.

SPECXFICATION forming part of Letters Patent No. 708,136, dated September 2, 1902.

Application filed January l0, 1902. Serial No. 89,171. (No model.)

To all whom it may concern,.-

Be it known that I, AUGUSTUS GoULD, a: citizen of the United States, residing at Norwich, in the countyof New London and State of Connecticut, have invented certain new and useful Improvements in Stop-Motions for Cutlery-Grinding Machines, of which the following isa full, clear, and exact description.

This invention relates to a class of mechio anisms commonly known as stop-1notions,

which mechanisms in dierent forms are applicable to various classes of machinery and serve to accomplish automatically the stop= ping of such machinery upon the Completion x5 of certain prescribed operations:-

The object of this present invention is to provide a stop-motion applicable'particularly to cutlery-grinding machineryin whicha reciprocating work-table is provided, and the zo said invention is therefore shown andv described in connection withsuch machinery. To assist in explaining this invention, the accompanying sheets of drawings have been provided, illustrating thesame, as follows: l

Figure l is an elevation of theY upper portion ofa grinding-machine fitted up with the newly-invented stop-motion. Fig. 2 is a side elevation of the knife carriage ortable of the said machine and of the stop-motion as seen 3o from the left hand of Fig. 1. Fig. 3 is a plan view,on a lsomewhat-enlarged scale, of the said tableand stopmotion. Fig. 4. is a side elevation of. a portion of ltheY s'aid table and of a certain element 'of the stop-motions mechanism that is secured thereto. Fig. 5 shows detached'a portion of the mechanism comprising the newly-invented stop-motion. 1 Referring to the drawings, the letter ct def notes the-upper portion of the stand of a 4o grinding-machine, and a/ a bracket secured thereto, supporting the bearings b of a shaft c, which latter bears fast and loose pulleys c' v c2,and at one end within asuitable casing (denoted by a2) the said shaft cbears the usual grinding-wheel d. The cutlery to be ground is introduced to the yface of the grinding# Wheel d, and to accomplish this end such cutlery is secured to a horizontally-reciprocat- Y ing table or carriage actuated by suitable 5o mechanism so as to travel toward and away from the said grinding-wheel.

The reference-letter a3 denotes a bracket secu red to the frame a, bearing thereon a block e, upon which latter the work-supporting carriage or tablef is mounted and adapted to tra vel reciprocally. The reciprocatory travel of the carriagef upon the block e is accomplished by means of mechanism located principally within the said block, and thus hidden from view and protected from dirt, and as such mechanism forms the subject of a separate application and is in no way a part of this invention it is thought necessary to illustrate and describe only the exterior elements of said mechanism. Describing now the said eXterior elements, the reference-letters g g' denote the ends of two parallel screws which project through the end of the block e and bear, respectively, gears h h', adjacent to the outer face of the said end of the block e. The gears h h' are in mesh with each other, and the former is also in mesh with a spur-gear h2, mounted upon a stud h3, projecting from the block e, which said spur-gear h2 has secured thereto one of a pairv of bevel-gears h4. The companion gear o'f the said pair of gears is mounted upon a shaft lo, supported in a bearing m', formed in a casting m, secured to the block e, Whichsaid shaft bears also a driving-pulley k2. Upon theV rotation of the drivingvpulley k2 motion is imparted from its shaft k 'through the pair of bevel-gears h4 to the spurgear h2 and from the latter to the gears h h and the screws g g', upon which latter the gears 7L and h are respectively mounted. The rotation of the screws g and g sets in operation the before-mentioned mechanism within the bed c, whereby the table f is actuated to travel reciprocally upon the said bed.

The reference-letter "a denotes a knife which is secured to the side of the .carriage j', as seen in Fig. l and as shown in dotted lines in Fig. 2. The driving mechanism of the carriage is so arranged as to cause thelatter to carry the knife into engagement with the emery-wheel d, the position of said knife and the extent of travel of the carriage being such that the knife-blade will be ground from its outer end to the bolster.

The particular office of the newly-invented stop-motion is to check the reciprocatory travel of the carriage f upon the completion IOO of each grinding operation-that is to say, lStop-motion mechanism are properly in posiupon the return of the carriage to its starting positionto permit the removal of the ground knife-blank and the insertion of an unground blank. Describing now particularly the said stop-motion, the driving-pulley 7a2 instead of being xedly secured to the shaft 7c is loosely mounted thereon and is adapted to be secured to the said shaft by means of clutch mechanism intermediate the pulley 7a2 and the bearing m.

The reference -letter o denotes a collar mounted on and secured to the shaft 7,: and serving, with the hub of the bevel-gear h4 of said shaft, to prevent endwise movement of the latter in its bearing m. The fixed collar o also forms the fixed section ofa clutch, the companion or slidable section of which is an extension o' ofthe hub of the driving-pulley k2. The confronting faces of the fixed and movable clutch-sections o o' are each provided with pins o2, which pins when the slidable clutch-section is held adjacent the fixed section are adapted to engage each other to cause the said fixed clutch-section to revolve in unison with the movable section and with the driving-pulley 7a2. A sleeve p is secured to the end of the shaft k, which sleeve is counterbored from its end adjacent the wheel k2 to provide a chamber p', which receives a springpg, that encircles the shaft k, and whose opposite ends abut, respectively, the bottom of the chamber p' and the hub of the wheel k2. The spring p2 acts normally to hold the slidable clutch-section 0 in close proximity to the fixed clutch-section o, causing the pins o2 to engage each other, thus locking the cimeli-sections o o together and locking the pulley k2 to the shaft k.

The reference-letter m2 denotes a bearing in the casting m, extending parallel with the bearing m and provided for the reception of a bolt q, which is capable of limited endwise movement in the said bearing m2. The bolt q at its end adjacent the wheel k2 carries a fork (j, that is adapted to engage an annular groove o3in the slidable clutch-section o, and the opposite end of said bolt q is beveled, as at q2, for a purpose to be explained. Adjustably bolted to the side of the carriagefis a plate s, having a hinged extensions', whose edge at its free end is beveled, as at s2. The said beveled end q2 of the bolt q (when the said bolt is in its inner normal position) lies in the path of the beveled end s2 of the hinged portion s' ofthe plate s, and said beveled edge .s2 in the rearward travel of the carriagefis adapted to engage the beveled end q2 of the bolt q to force the latter outward and separate the clutchsections o o'. \Vhen the stopmotion is in position upon the grinding-machine, the beveled edge .s2 is adapted to thus engage the bolt q to separate the clutch-sections just at the completion of the rearward travel of the carriage e.

Assuming that the various elements of the tion and that a knife-blank is in position to be ground, the carriage f travels in the direction of the arrow in Fig. 2 until said carriage reaches approximately the position shown in dotted lines in said figure. The carriage j" is then automatically reversed and travels in the direction of the arrow of Fig. 3 and opposite that of the arrow in Fig. 2. Just before the carriage f reaches its rearmost position (the position shown in dotted lilies in Fig. 3) the beveled edge s2 of the hinged plate s engages the beveled end q2 of the bolt q, causing the bolt end to ride upward on the said beveled edge s2 and onto the plate s", thus sliding the said bolt in the bearing m2 and through the fork q separating the slidable clutch-section 0 from the fixed section o, (see Fig. 5,) operating against the force of the springpz, the just-mentioned movable parts and the driving-wheel 7a2 being changed from their positions shown in full lines to those shown in dotted lines in Fig. 3. Upon the several movable elements assuming their respective positions (shown in dotted lines) the clutch-sections o o will have become disconnected and the travel of the carriage will of necessity cease. The finished knife-blank may now be removed from the carriage and an unground blank placed in position, after which the carriage is again set in motion by simply rocking the hinged plate portion s' upward from and out of contact with the bolt end q2, (Fig. 4, dotted lines,) th us permitting the spiral spring p2 to return the several movable elements to their normal positions, the clutchsections o o' becoming again locked and the driving of the carriage again effected.l As the carriagefagain travels forward the hinged plate-section s' rides upon the end of the bolt q until the latter passes from beneath said hinged section, when the latter is allowed to drop by gravity to its normal position.

While the newly-invented stop-motion is shown and described as applied to cutlerygrinding machinery, itis not to be considered as confined to such use, as itwould be equally applicable to other classes of machinery embodying a reciprocating table driven in substantially the same manner as here shown.

Having thus described my invention, I claim- In combination with a shaft 7c, a constantlyrotating pulley loosely mounted on said shaft, clutch mechanism connecting the said shaft and pulley, a reciprocating table, and means for disconnecting the saidclutch consisting of a rod q, fork q', and a hinged latch carried by the said reciprocating table, substantially as herein specified.

Signed at Norwich, Connecticut, this 23d day of December, 1901.

AUGUSTUS GOULD. lVitnesses:

FRANK H. ALLEN, FRANK S. DEWIRE.

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