US1933055A - Machine for grinding or polishing cutlery - Google Patents

Description

A. v. HAGUE, JR 1,933,055

Oct. 31, 1933.

MACHINE FOR GRINDING OR POLISHING CUTLERY Filed Sept. 7, 1932 4 Sheets-Sheet l ii-i- /a Z Oct. 3l, 1933. A, v. HAGUE, JR

MACHINE FOR GRINDING OR POLISHING CUTLER Filed Sept. 7. 1932 4 Sheets-Sheet 2 0f 31, 1933 A, v. HAGUE, JR 1,933,055

MACHINE FOR GRINDING OR POLISHING CUTLERY Filed Sept. 7, 1932 4 Sheets-Sheet 5 j?? 2709;' l gef/Q 5 r j Mtrzesses A. v. HAGUE, JR 1,933,055

MACHINE FOR GRINDING. OR POLISHING CUTLERY Oct. 3l, 1933.

4 Sheets-Sheet 4 Filed Sept. '7, 1952 M'fzesses. {Z} o 7111671/ 7. l www' maf NWQM) Patented ct. 3l, 1933 UNITED STATES MACHINE FOR GRINDING OR POLISHING l CUTLERY Albert Victor Hague, Jr.,gCrookes, Sheffield, England Application September 7, 1932, Serial No. 632,016,

and in Great Britain July 23, 1931 claims. (C1. 51 -1'22) This invention relates to a machine for grinding or polishing cutlery and has for its object to provide eilicient means whereby cutlery blades can be expeditiously ground or polished.

5 According to this invention a machine for grinding or polishing cutlery is so constructed that blades contact with the grinding wheel or polishing wheel for only one direction of radial or substantially radial movement relatively .to v

' ings, Figs. lA, 1B and 1C give a complete view 65 such wheel.

In a convenient form of the invention av plu.

rality ofblade holders or carriers are mounted radially with respect to the grinding or polishing wheel and are adapted to be moved radially theretowards upon the end of a member which in turn is adapted to move axially with respectV to the grinding or polishing wheel, theV arrange-y ment being such that the following cycle of movements occurs: alternate carriers are simultaneously brought inwards to bring the blades thereon into the held of operation of the wheel, the member moves forward to bring such blades at their bolster ends into contact with the radial face of the wheel,l these carriers with the blades move outwards to effect the grinding or polishing, the member moves backwards to initial position and then the preceding movements are repeated but so that the remaining carriers with blades thereon perform the radial movements. It will be observed that the blades have no inward movement in contact with the grinding or polishing wheel.

Alternatively there may bethe following cycle of movements; all the carriers are simultaneously brought inwards to bring the blades into the held or operation of the grinding or polishing wheel, the carriers move towards the wheel to bring blades at their bolster ends into contact with the radial faceA of the wheel, the carriers move outward to effect the grinding or polishing, they move away from the wheel to vinitial position, they are individually given a slight turn to bring a fresh set of blades opposite to the working face of the wheel, the prec cedingY movements are repeated to grind or polish the fresh set of blades, and then the above cycle of movements is'repeated until all the blades, say, nine, mounted about the periphery of the carriers have been ground or polished.

upon each carrier, say, nine, multiplied by the number of carriers, say, eight, or seventy-two, in

all, can be quickly ground, and then the machine this way, as many blades as the number arrangement also, the blades have no inward movement in contact with the working face of the wheel.

' The action of the machine is automatic up to and including the stopping ofthe machinel for unloading and recharging of the carriers. A

The accompanying drawings show a convenient construction of machine made according to the present invention. In the said drawof the machine, Fig. 1A being a sectional elevation of one half of the upper portion, Fig.l 1B being a side elevation of the other half of the upper portion and Fig. 1C vbeing an elevation, partly in section, of the lower portion of the machine..

Fig. 2 shows an end elevation and section on the line 2 2 of Fig. 1A, looking in the direction or" the arrow.

Fig. 3 shows a detail of parts shown in Fig. 2. 75

Fig. 4 shows a section on line 4-4 of Fig. 1A.

Fig. 5 is a detail view to an enlarged scale of an assembly shown in Fig. 1C.

Fig. 6 is a diagrammatic View of a modiiication.

Fig. '7 is a plan view'of the machine showing four of the workcarriers in their relation to the grinding wheel.

The wheel l is driven by means of a shaft 2 and pulley 3. Another pulley 4 affixed to the 85 said shaft drives the luid'pump 5 by belt 5a and pulley 5b. Surrounding the shaft and causing it to be supported at both ends is a housing 6, attached to or in one with the base ofthe machine. Arranged concentrically around 90 the housing 6 and slidable vertically is a sleeve 7 adapted to be moved axially with respect to the wheel. Attached to the face '7a of the sleeve .7 nearest to the wheel is a hub 8, which moves coaxially with the said sleeve 7. A number of piston rod guides 9 are tted tightly in the hub in radial positions and obliquely with respect to the wheel l. Stationary pistons 10 are situ-' ated at that end of the piston rod guides, hereinafter called guides, furthest away from the hub.

As many guides are provided as the circumference oi the hub will permit, say eight.' For simplicitys sake the drawings show a construction of machine with four guides only.

A cylinder 11 surrounding each guide is adapted to have a reciprocating and rotational kor swivel movement about its guide,'said cylinders having a bore 11a to suit the piston diameter. and a bore 1lb to suit' the guide diameter; a 110.

flanged leather 12 surrounds the guide at the inner end o the cylinder.

Racks 13, Figs. 1A, 1B, and 2, are longitudinal extensions from the cylinders at the side fur- 5 thest away from the wheel. Engaging these racks are pinions 14 mounted on shafts 15, supported by bearings 16 and 17, forming part of extensions 7b from the sleeve 7. Shafts 15 are interconnected by means of universal joints 18, thereby effecting uniform and simultaneous reciprocation of the cylinders.

Means are provided for limiting'the outward movement oi the cylinder l1. As shown, a pin stop is inserted in one of a number ofv holes 19 in the face of the pinion 14, such pin engaging an adjustable stop 20 on the bearing extension 7b from sleeve 7.

The limit of inward movement of the cylinder 11 along the guide 9 is accomplished by the cap 2l engaging the outer face of piston 10.

Adjustable strips 22 and 23 Figs 1B and 2, are attached longitudinally at the side of each cylinder, said stripsbeing inclinedly adjustable through the medium of slotsV 22a, .screws 22o and set screws 220, upon the surface of the cylinder. The strip 23 engages a roller 24 mounted in an upright arm 25 attached to the 'extension 7b from, the sleeve 7,- said roller thereby providing a reaction against ,the thrust of the wheel 1 upon the blade being ground or polished. The other strip 22 engages a rollery 26 mounted at the end of a rod 27, said rod working slidably in'an uprightguide 28 against a spring 29, the guide being attached to the' extension 7b from the sleeve 7.

The spring 29 acts upon the bottom end of the rod 27 causing the strip 23 to be held up to and against its corresponding roller 24.

As the cylinders move along their respective guidesrthe strips 22 and 23 traverse across their respective rollers. By adjustment of the strips the degree of swivelling or rotational movement of the carriages around their guides can vbe regulated, this said swiveling or'rotational movement being one of the movements necessary to enable the Wheel to act on the back of the blade at its bolster end so that it is thicker than the back of the blade at its point. f

To overcome the tendency `of the wheel to ro tate the sleeve 7 around the housing 6, the sleeve is slidably but'non-rotatably mounted over the housing 6.

The mechanism for raising or lowering thel sleeve 7, and so causing the yblades to be brought up against or carried away from the wheel, will now e described.

Ar ller 30 revolves around a fixed pin held,

pin 37 attached to the lug engaging said slot,V

thereby permitting a sliding but not a rotary motionof said spindle.

" The lower end of the lug 32 rests upon the upper face of an internally threadedworm wheel 38 surrounding the threaded spindle 33, a wormY 39 engaging the said wheel.

'Ihe worm 39 can be operated by hand through the medium of a convenientlyv situated hand wheel and shaft in order to traverse 'the worm Wheel over the spindle 33 for the purpose of raising the sleeve 7 to suit the wear of the wheel 1.

A wedge 40 passes between the rollers 35 and 30 and supports the spindle 33, said wedge being connected at one end to a piston rod 41 of a piston 42 operating in a iuid cylinder '43.

Motive uid is applied alternately to each side of the piston 42 in order to reciprocate the `wedge 40 and cause the sleeve 7 and its attachments to rise or fall. The lower face of the wedge is Vparallel with the axis of the piston and piston-rod.

Part'of the top face of the wedge is inclined,

lthe remaining part being parallel to the bottom andtherefore no tendency to raise or lower the sleeve 7.

A sprocket 44 is fastened tothe face of one of the gear Wheels 14, said sprocket being connected by means of a roller chain 45 to another sprocket 46. Sprocket 46 is supported by an eX- tension 47 from the sleeve 7. Valver assemblies Vl and V2 are also supported by sleeve 7, and are for the purpose of controlling fluid to land from the cylinder 43 when the cylinders have reached their limits of reciprocation.

An extension 48 from the lifting wedge 40 carries three pins, 50, 5l and 52. Pins 50 and 51 operate the trip lever 49 of a reversing piston Valve 56 in valve assembly V3, and pin 52 operates the' lever 53 operating the cut-ofi piston valve 68 in valve assembly V3. The levers 49 and 99 have a quick action mechanism of any known construction.

Motive uid, for example oil, is supplied to the machine by the vpump 5 driven from the shaft 2,'s'aid pump obtaining its feed as from a sump reservoir 93l which may be contained in the base of the machine. The motive iiuid is forced through pipe 54 and port 55 in the valve assembly V3 tothe cut-off chamber containing piston valve 68. When piston valve 68 is inrits left hand position (Figs. Y1C and 5) the motive fluid passes through port 78 into the reversing valve chamber containing piston valve 56. Valve 56 controls primarily the admission of uid'to one or the other side of the pistons 'loin cylinders l1, and the exhaust from the opposite side of'said pistons, as the case may be.

A vlead 57 from valve assembly V3 engages header 6l and a branch 58 from this lead is connected to valve assembly V1. AAs many branch leads 59 as there are cylinders are taken from the header 61. Each branch' lead is attached to the hub end of a guide 9, there being one said lead tov each guide.

Bores 60 in guides 9 carry the motive fluid to, or exhaust it from, the outer sides of pistons 10.

A lead 62 from valve assembly V3 engages header 63, and a branch 96 from this lead is connected to the valve assembly V2. As many branch leads 64 as there are cylinders are taken from this header. Each branch lead. is also attached to the hub end of a guide 9. again there being one said lead to each guide.

Bores 65 carry the motive fluid to, or exhaust it from, the inner sides of pistons 1G.

Leads 129 are taken from the cylinders at position 66, where the leadsf129 are always open When thewedge 40 and thereby the' piston Valve 56 is pushed to the left, the motive fluid is being fed through ,port S4 to the inner sides of the pistons 10, and theV uid at the outer sides of the pistons is now exhausting through bore 60, leads 59, header 61, lead 57, port 85 and exhaust port 82 back tothe fluid sump 93V through the pipe 193. Y

When the cylinders have reached theirinward limiting positions, and piston valves 100 and 101 have Vmoved to the right tothe position shown inFig. 5 the fluid supply entering the left hand end of cylinder 43 forcesthe piston l42 to drive the fluid out of the right hand end of the cylinder through pipe 196, port 87, and exhaust port 33 o the valve assembly Vlback to the iluid sump through the pipe 197.

The speed of the inward idle stroke of .the

spindle 166 withineach carrier 103 has at its outermost end a screw thread on which is locked a hand wheel 107 and at its innermost end has a further screw thread on which'is locked the carrier or blade holding sleeve 103 which has say nine supports for blades.

rSurrounding the spindle 106 is a hollow shaft lwhich is held securely by `bracketll) Vfrom cylinder 11 sol that the shalt 103 is heldin a radial position relatively to the grinding wheel yand is parallel or substantially parallel to the axis of the cylinder 11.` The right hand end of shaft 108 acts as a bearing support for the movable blade-holding sleeve 103. Ther left hand end of shaft 108 has a flanged collar 110 fastened to it.A

The collar 110 supports the case 111 integral with which is the fluid cylinder 67. A ring 112 is fastened concentrically to the face of the collar 110. The outer face of the ring 112 is in the form of one half 113 of a dog clutch, and

this ring also carries two cam Ysurfaces 114 arranged diarnetricallyk opposite, the inclination terminating in a perpendicular' return 115.Y

A ring ratchet 116 fixed to the spindle 106 carries the other half 117 of the dog clutch. An armed sleeve 116 is a working rit on the spindle 106, side play being eliminated by a nut 119 screwed on spindle 106.

One end oi the armed sleeve has three arms or 'extensions shrouding theratchet 116. Two of these extensionslZO are diametrlcally'opposite, the other extension 121 being at right angles to said two extensions 120. Extension 121 carries a pawl 122 which engages the teeth on ratchet 116. A finger 123 pivoted on a pin 124 has a short rearward extension 133, the iinand 4. Engagingthese teeth is a rack milled on the piston 123- working in the cylinder 67. Motive fluid is supplied to the cylinder 67 by the lead 129 from points 66 on the cylinders 11. A spring 130 4) nesting in a bore in piston 128, forces the pistonback to its initial posi- .tion when the motive fluid is released toexhaust.

Thecylinder ends act as piston stroke limits. On that portion of the spindle 106 extending through a bore in the casing 111, is a declutching collar 130, the collar having a cam face 131 corresponding to a face on the boss of casing 111, the collarY being fitted with a lever arm 199 whereby it may be operated by hand to eiect declutching of the dog clutch when it is desired to turn the blade carrier by aid of the wheel 107 for any reason such as charging the carrier independently ofthe automatic turning eected by the 'machine The number of ratchet teeth and the number of dogs on the part 116 is the same as the number o. blade supports on the sleeve Y103, say nine: .therefore the ratchet teeth would be say 40; apart. VThe 'stroke of the piston 128 is regulated so thatY the pawl swings through an angle of about therefore giving an idle swing of 30 over and above the pitch of the ratchet teeth.'

When the cylinders 11 are on their inward strokes, the niotiveiluid through pipe 129 forces the piston 123 along its cylinder, the armed sleeve rotates around the spindle 106, which is now stationary, being lockedfby means of the dog clutch, and held locked by the spring 132. During the rst 30 of rotation of the armed sleeve the pawl 122 passes idly down the back of a ratchet tooth (see Fig. 4) simultaneously aslthe fingers 123 are travelling along the cams 114, causing the dogs 117 and 113 to be gradually declutched. When the 30 swing is finished the dogs 117 and 113 are out of mesh, dogs 117 having been pushed out of Contact by the cams pushing against the fingers 123, said iingers transmitting the push to the armed sleeve and thence to nut 119 and spindle 106.

The ratchet 116 and dogs v117, armed sleeve 121 and spindle 106 together` with sleeve 103 and hand wheel 107 are now free to revolve. The pawl 122 Vis by now positively engaged with a ratchet tooth and the piston 128 has a remaining length of stroke equivalent to 40 rotation of the armed sleeve. lThe piston therefore turns the armed sleeve, the pawl in this sleeve turns the ratchet ring 116 and dogs 117 until the piston reaches its limit of working stroke. Simultaneously the lingers 123 have overlapped the end 115 of the cams 114, andas the dogs are new in line of mesh, the spring 132 pulls the said dogs into lock. As the blade holding sleeve 103, spindle 106 and the dogs 117 are fastened together, the sleeve 103 has also rotated 40 or 1/9th ofV a revolution. The sleeve holding say nine equally spaced blades has 'therefore placed a fresh blade into grinding position.

The preceding movementsY occur on ward stroke of the cylinders, when the carriers andA cylinders are` making their idle inward stroke. When the iluid supply is reversed by the action of the reversing piston valve 56, the cylinders 11 begin their working strokes, with the blades up against the wheel. As the motive fluid to cylinder 67 is now open to exhaust throughthe pipe 129, the spring 130 (Fig. 4) forces the piston 128 back to its initial position, the armed sleeve together with the pawl and the fingers, also returning to their initial position. 1 1

The lblade-lriolding assembly and the method ci changing the blades are as followsz A lever 134 working on a pin 139 held in bearing bracket 136 has a roller 137 attached to one end, Vthe other end being an off s etV 138 at right the inangles to the lever, said offset bearing down on the shank of a bladewhich is resting in a V- block 135 fastened in the sleeve 103. The face of the blade rests on its support which has Va base shaped to give the blade a firm bearingl surface. A pin 14u forms a stop for the blade in its tendency to be moved with the sweep of the wheel. A spring 141 bearing on the lever 134 presses down the offset 138 to provide sufficient pressure on the blade shank or handle in the V-block, to hold the blade whilst it is being ground.

A weaker spring 142 tends to throw the blade out of its holder. An arrn 143, Figs. 1B and 3, is pivoted on a pin 144 kon the bracket 109 and is normally clear of the pathv of movement of the rollers 137. When the grinding operation is complete and the machine has come toa standstill this arm is turned inwards to the eX- tent permitted by a fixed pin 145 also on bracket 109 and the inner end of the arm is then in the path of the rollers 137 so that as the carriers or sleeves 103 are turned by hand (by the use of lever 199 and wheel 107 as previously described) the rollers 137 come into contact with. the arm and are pressed inwards asI shown in Fig. 2. The offset 138 is thus removed from Contact with the shank or handle and the blade or knife is thrown out of its holder by the spring'142. The holder is thus cleared ready to receive a fresh unground blade which is inserted and held until the handle 107 has been turned sufficiently for the roller 137 to move on past the inner end of the arm 143, when the lever 134 'is again operated on by the spring 141 to press the offset 138 down on to the shank or handle of the newly inserted blades. In this way each carrier can be charged with, say, nine, frei blades.

The arm 143 is finally swung clear of the rollers 137, the declutching lever 199 is released, and the machine is then ready for a fresh grinding or polishing operation.

In the modification shown in Fig. 6 the shaft 2C, as before, runs in a fixed sleeve 6c and carto and from the two sides of the piston on each fixed rod. Holders for blades 200c are independently attached to the outside periphery of the cylinders.

One complete reciprocation of each cylinder consists of an idle stroke (during which said stroke the faces of the said blades are forced inwards towards the centre line of shaft and away from the working face of wheel) and a working stroke, during which the faces of the said blades are forced outward away from the centre line of the shaft and up against the working face of the wheel.

The movement of the blades, upwardly towards or downwardly away from the working face of the wheel, is directly effected by the movement of the sleeve 7 as it rises or falls. This movement of the sleeve may be accomplished by means of a bell-crank lever so arranged that it holds the outer sleeve (and therefore the knife blades) against theworking face of the wheel during the working stroke, said lever being also instrumental in holding the outer sleeve away` from the working face ofthe wheel during the idle stroke.

The bell-crank lever may be actuated from a iston actuated byfluid, as for example, oil.

The machine is operated in a very similar way to that described with reference to Figs. 1 5, but in. the present construction a two-way branch valve controlled by hand is introduced into the fluid system for 'the purpose of directing the fluid 'to alternate cylinders 1lc and cutting it off from the remaining cylinders, and then cutting off the fluid from the said remaining cylinders and directing it to the said alternate cylinders. During the time that alternate cylinders are` making their working and idle strokes the remaining cylinders are at and the blades thereon can be changed.

Although the invention has been described more particularly as employing oil pressure it will be understood that the invention is not lim-- ited thereto. For example, other fluid pressure such as air pressure might be used.

What I claim and desire to secure by Letters Patent is: y

1.y A machine for grinding or polishing cutlery comprising a rotary grinding or polishing wheel mounted about a vertical axis, a plurality of radially disposed blade carrying members mounted below and in proximity-to a lateral face of said wheel, means for effecting inward and outward movements of said blade carrying members radially with respect to the axis of said wheel. means for causing the blade carrying members to rise and. contact blades thereon with the wheel on outward radial movement of said blade carrying members. means for causing the blade carrying members to fall again on inward radial movement, means for imparting a canting movement to the blade carrying members during their outward radial movement. and means for imparting a rotational movement to said blade carrying members subsequent to their outward radial movement so as to effect an angular change of their position for their subsequent outward radial movement.

2. A machine for grinding or polishing cutlery, comprising a rotary grinding or polishing Wheel mounted about a vertical axis, a plurality of radially disposed blade carrying members mounted below and in proximity to a lateral face of said wheel, fluid operated means for effecting inward and outward movement of said blade carrying members radially with respect to the axis of said wheel, means for causing? the blade carrying members to rise and contact blades thereon with the wheel on outward radial movement of said blade carrying members, means for causing the blade carrying members to fall again on inward radial movement, means for il parting a canting movement to the blade carrying members during their outward radial movement and means for imparting a rotational movement to said blade carrying members subsequent to their outward radial movement so as to effect an angular change of their position for their subsequent outward radial movement.

3. A machine for grinding or polishing cutlery comprising a rotary grinding or polishing wheel mounted about a vertical axis, a plurality of radially 'disposed blade carrying members mounted below and in proximity to a curved lateral face on said wheel, fluid operated means for effecting inward and outward movements of said blade carrying members substantially radially with respect to the axis of said wheel, fluid operated means for causing the blade carrying members to rise and Contact blades thereon with the wheel on outward radial movement of said blade carrying members and to fall again for inward radial movement, means for imparting a canting movement to the blade carrying members during their outward radial movement, mechanically operated means for synchronizing the radial movement of the blade carrying members and hand operated means for raising said blade carrying members bodily towards the grinding or polishing wheel.

4. A machine for grinding or polishing cutlery comprising a rotary grinding or polishing wheel substantially radially with respect to the axis of said wheel, uid operated means for causing the blade carrying members to rise rand contact blades thereon with the wheel on outward radial movement of said blade carrying members 30 jand to -fall again for inward radial movement,

means for imparting a canting movement to the blade carrying members during their outward radial movement, mechanically operated means for synchronizing movement of the alternate blade carrying members and hand operated means for raising said alternate blade carrying members bodily towards the grinding or polishing wheel.

5. A machine for grinding or polishing cutlery comprising a rotary grinding or polishing wheel mounted about a vertical axis, a plurality of radially disposed blade carrying members mounted below and in proximity to a curved lateral face of said wheel, fluid operated means for effecting inward and outward movements of said blade carrying members substantially radially with respect to the axis of said wheel, uid operated means for causing the blade carrying members to rise and contact blades thereon with the wheel on outward radial movement of said blade carrying members and to fall again for inward radial movement, means for imparting a canting movement to the blade carrying members during their outward radial movement, mechanically operated means for synchronizing the radial movement of the blade carrying members and hand operated means for raising said blade carrying members bodily towards the grinding or polishing wheel and means for imparting a rotational movement to said blade carrying members subsequent to their outward radial movement so as to effect an angular change of their position for their subsequent outward radial movement.

ALBERT VICTOR HAGUE, JUNIOR.

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