Jan. 7, 1947. i K. H. POND 2,413,781 APPARATUS FOR OPERATING MACHINE’ TOOLS Filed April 11, 1944 5 Sheets-Sheet l z 6% ‘7% 1% ff, INVENTIOR. ' Mao/4,; W17 , Jan. ‘.1, 1947, - K. H. POND . 2,413,781 APPARATUS FOR OPERATING MACHINE TOOLS ' Filed April 11,- 1944 > z Sheets-Sheet 2 INVEN TOR. BYMGQM ' I Jan. 7, 1947. K. H_ POND 2,413,781 APPARATUS FOR OPERATING MACHINE TOOLS Filed April 11, 1944 / 3 Sheets-Sheet 3 ' 7/2 w ‘ IN VEN TOR. J zfwwzéz/zm I “MG/Q4, 2,413,781 Patented Jan. 7, 194'? UNITED STATES PATENT OFFICE 2,413,781 . APPARATUS FOR OPERATING MACHINE TOOLS Kenneth H. Pond, Longmeadow, Mass, assignor to Pond Engineering Company, Spring?eld, Mass, a corporation of Massachusetts Application April 11, 1944, Serial No. 530,536 7 Claims. ' (01. 90—21) 1 machine as described, work is fed to work hold ing and positioning means associated with the transporting member and the control member is The principal objects of the invention are di actuated to bring about movements of the said rected to apparatus which is connectable to a machine tool for operating the same. That is 5 transporting means thereby to bring the tool and work into operative relation for successive oper— operating the same in substantially the same ations or to produce successive objects. And manner as it is operated by an operator. means is provided in connection with the appa~~ In this Way an apparatus of the invention may ratus to insure accurate positioning of the work be connected to a number of machine tools there with'other safety features contributing to the by to make it possible for a single operator tobe production of uniform objects or parts or oper responsible for a number of machines instead ations. of one as is the common practice. Various changes and modi?cations may be According to one feature of the invention, the This invention relates to apparatus for oper ating machine tools. _ made in the form of the apparatus to adapt it apparatus is ‘of unitary‘ form so as to be self contained and thereby adapted for connection 15 for use in connection with various machines to any machine tool for operating the same. therefore it is notdesired to be limited to the speci?c form of the invention which is herein after disclosed in the form at present preferred and taken in connection with the accompanying In this way?the apparatus may be disconnected from one machine and connected to another at will. According to another novel feature of the in vention the apparatus hereof is adapted for con nection to and for the operation of existing ma 20 chine tool's, they not requiring reconstruction a Fig. 1 is a front elevational View of apparatus embodying the novel features of the invention ;j Fig. 2 is a sectional elevational view on the line since the apparatus is intended to be accommo dated to said existing machines. drawings wherein: '--2 of Fig. 1; A , According to a further novel feature of the 25 Fig. 3 is a sectional plan view on the line 3-3 of Fig. 1; invention, the apparatus is automatic in its op Fig. 4 is a sectional elevational view on the eration so that pieces of work or objects‘may be line 4—4 of Fig. 1; and produced successively without the intervention of manual'labor. ' Fig. 5 is a diagrammatic view to explain cer I > They apparatus is adaptedv for broad vapplica 30 tain features of the invention. Referring now to the drawings in detail, the tion wherever it is desired to produce successive invention will be more fully explained. operations or objects but is particularly adapted Parts of a machine tool M such as a milling for a machine tool where a tool and work holder are relatively movable to bring the work and tool into engagement for successive machining oper ations. machine are represented by dot-dash lines. The table or bed thereof which may be called a trans 35 ' While it is not intended to be so limited, the apparatus is well suited for connection to and for the operation of a milling machine. A com mon form of milling machine has a rotating tool 40 or tools and a table or slide,'which may be called a transporting member, that is provided with work holding means. Back and forth movements porting member is represented by Z. This sup ports work holding means and is movable rela tive to a bed 5 towards and away from a tool 4 which may be a rotatable cutter or cutters. A control member 6 is swingable back and forth to bring about movements of the transporting mem ber 2. The said control member operates to bring about movement of the transporting mem of the transporting member relative to the tool or ' ber forward and back and at the desired speeds tools ,brings worklinto engagement with the tool or rate of movement. A supporting structure includes side supports ’ or ‘frame members I ll that are held in spaced re for. successive operations or the forming of suc cessive objects. The movements of the trans porting member are brought about or initiated lation by rods l2 secured thereto. Also form ing a part of the supporting structure there is a by movement of an oscillatable or other movable control member. It is usual with such machines 50 horizontal rod or rods [4 ?xed in the members I [I to whichbrackets l6 are ?xed that have other for the operator to place work in and remove horizontal rods [8 ?xed therein. Brackets 26 it from the holding means and to shift the con ?xed on horizontal rods [8 have vertical rods 22 ?xed’therein and other brackets M on the verti— and arranged so that when connected to such a 65 cal rods have ?xed therein other horizontal rods. trol member for each cycle of operation. The apparatus of this invention is constructed 2,413,781 3 . one which is flexible to accommodate various con ditions since the brackets are secured to the rods in any place by means of pins, set screws or the like. 4 described for driving the cam shaft ‘I0 from the drive shaft 88. A pulley 82 loose on drive shaft 68 may be of any form and operably connected to any suitable The vertical and horizontal rods together with the brackets provide a strong rigid structure and source of power. A gear or sprocket may be sub~ stituted for the pulley and connected to a source of power. The rods and brackets may thus be dis posed in any desired relation. The vertical rods A clutch member 84 is slidable on the shaft or as many as may be desired thereof may ex 60 and carries a pin 88 passing through drive tend to the floor for supporting and steadying the structure. Work holding means adapted to be secured to 10 member 82 for engaging a pin 08 on gear '52. A spring 90 normally urges the clutch member away from "pulley 82. the transporting member 2 may ‘include a lower member 30 and an upper member 32 pivoted thereto at M. The upper member swings so as to. ' A lever 92 is pivoted at 94 to a bracket 95 and has a forked upper end engaging the clutch mem cooperate with the member 30 for engaging and 15 ber 84;‘ 'A collar‘0‘8'on the shaft 63 serves as an holding work therebetween or for releasing the same. Work in the illustration of the invention abutment for said lever 92. When said lever 92 is swung counterclockwise the member 84 is moved to the left whereby members 86 and 88 are being described consists of a bar of 'metal W. engaged so that gear ‘I2 is rotated by member 82 The end portion of the bar of work Wis, errgaged and disengaged so that it is presented to 20 to bring about rotation of the cam shaft ‘I0. A cylinder I00 pivoted to the frame is of the the tool 4 for successive operations or for the type already described and it has a‘ rod- [02 which forming of successive objects therefrom. passes through lever 92 with a collar ‘.94 on its A locator 36 is movable up and down relative end. Movement ‘of the rod I02 to the left brings to the member 32 and is arranged to engage the about swinging of ‘the lever 92, as described for end of the bar W or to be engaged by 'said bar for locating the end portion of the bar relative to the holding means and tool 4. engaging the clutching members 85 and >88. ‘ A rock shaft I04 in the upper ends of the frames I A lever 38 is pivoted at'40 to the member 32 and has a slotted end for receiving a pm of the locatorki‘wi as shown. Asthe said lever 38 swings ‘ the locator 36 is moved downwardly to its work locating position and upwardly therefrom. I2 is provided ‘on which an inner lever I06 is ?xed. An outer lever I08'is also ?xed to said shaft I04. A rod H0 extends between and is ?xed to the upper ends of levers I08 and I06 on which a member I I2'is‘slidable. I A cylinder 42. is pivoted to a bracket“, as shown, and has a piston therein, not shown, which carries a rod 4% engaging member 32. As the A rod II4 connected to member II 2 extends through guide 62 and its end is connected at H6 piston is operated to move the rod upwardly the member 32 is swung counterclockwise for clamp An arm H3 of lever I06 is connected by a rod i251 to the upper end of a lever I2I which is jour ing and holding the bar of work >W. nalled on shaft 16. The lower end of level‘ I2I carries a roll I22 in engagement ‘with‘a cam I24 ' vIn the form of the invention being described to clamp 65, previously described (see Fig. 4). there are other cylinders similar to the cylinder 42 vwhich will be described. These cylinders all ?xed on'cam shaft 10. ‘ have a piston reciprocable therein so that air under pressure admitted to one end or the other will act on the piston and move it in one direc tion. A spring acting on the piston will move it in an opposite direction. Such will be within the tion of the apparatus the} mechanism described skill of one skilled in the art and need not be further described. ' ~ ' ‘ Such a cylinder is shown at 48 and a piston rod 50 thereof is pivotally connected‘ at 52 ‘to lever 38. The rod 50 swings lever 38 counterclockwise for acting on and operating the work locator 36. ' Contacts 54 and 56 are carried by insulating blocks 53 associated with members 32.and 38 for a purpose later to be described. ‘ As cam shaft ‘I0 rotates in each cycle of opera operates to feed thejwork W forwardly a cer tain distance. The member II2' slides back and w forth on the rod H0 as the transporting member 2 moves backv and forth towards and away from the tool .4. ' A spring I23 extends between member I2 and pivotal connection of the rod I20 andlever I2I to yieldingly hold cam roll I22 on its cam. A clamp: I20’} is adapted to be secured to the control lever 6, A connecting rod7l22 has one end connected at I24 torthe clamp I20’ and its other end is slidable ina bracket ‘24. A slide L25 is slidable on the rod I22 and it has a pawl I28 pivoted ‘thereto for engaging a notch in rod I22, as shown in Fig. 1. A magnet I30 is A bracket 68 extends outwardly from the mem ber 30 which has a guide 62 on its outer end. This guide 52 receives the work W for guiding carried by the slide which when energized moves it to the holding means, see Fig. 4. A slide 64 is the pawl upwardly. slidable on the work W and it has a clamp mem A cylinder I32 is pivoted to a bracket I34 ?xed ber 65 pivoted thereto that is adapted to fric to a rod 22. and the end of rod I36 thereof is tionally engage the work W as the slide is moved connected to a plate I38 a?ixed to said slide I26. to the left‘ in Fig. 4 and thereby feed the work As rod I36 is’ moved to the‘ left in Fig. 1, the slide towards the work holding and locating means. I25 is moved so that with pawl I28 in the notch As the slide moves to the right the clamp slides 65 of rod I22 the control member 7'6 is actuated. along the work. In this way by successive move~ A bracket I40is adapted to be secured to the ments of the vslide '04 back and forth the work is transporting member 2 and it has a lever I42 fed to the work holding and locating means in a step by step manner. ' ' - ‘ pivoted therein at I44. A spring I46 connected A'drive shaft 63 is rotatable in the frames Ii) 70 at one end to the lever I42_and at its other end to an eye I48 adapted for attachment to the as is a cam shaft ‘I0. A gear 72 ?xed on drive shaft 68 is in mesh with a gear 14 ?xed to a shaft transporting member 2 urges the lever in a ‘I6 journaled in frames I0. Other gears 10 and 80 ?xed to the shafts ‘i6 and ‘I0 respectively pro counterclockwise direction. vide means in conjunction with the gears already A rod I50 pivoted at one end to the lever I442 is in slidable engagement with a plate’ I52 carried 2,413,781 5 6 by slide I26 and has adjustable thereon spaced on the work W with member 66 engaging it to collars I54 and I56. advance the bar towards the holding means. The locator 36 is operated so as to be engaged by the end portion of the work bar W or to } A pawl I60’ swingable on a bracket member I60 is spring pressed towards the rod I50 by a spring I64 secured to bracket I60 and it has an outwardly extending yieldable springlike mem ber I66 which is engageable by a stud I68 adapted to be affixed to the transporting member 2. engage said bar and position it relative to the holding means and tool subsequent to which the member 32 is caused to clamp the work between it and member 30 whereby the work W is held for the machining operation as transporting The cylinders 42, 48, I00 and I32 are con nected by suitable conduits to valves I80, I82, 10 member 2 carries the work to the tool. Valve I86 is operated by cam 2| 0 so that air I84 and I86 which valves are supplied with air is admitted to cylinder I32 the rod I36 of which from a suitable source by means of a conduit moves the slide I26 that acts on the control mem I88. ber 6. Said control member in its movement The valves referred to may take any form desired but‘ in the form of the invention being 15 brings about movement of the transporting mem ber at the desired speed to present the work to disclosed they are what may be called three the tool for the machining operation. It will be way valves. These valves include a body I90, understood that in order for the slide to move the see Fig. 2, in which a closure member or disc on rod I22, the pawl I28 must be in the notch of a stem I82 moves towards and away from a seat. ' When the disc is away from the seat the 20 said rod. The contacts 54 and 56 associated with mem bers 32 and 38 are in a circuit including the magnet I30 and a suitable source of energy and fuhc' .A lever I94’ pivoted to the body carries a roll tion for the following purpose. I95. As the lever I94’ swings toward the body As the lever 38 swings to carry the contact 56' the stem is pressed inwardly to move the disc 25 downwardly as it does when the positioner is from off its seat and air passes through the moved downwardly said contact strikes and valve to the cylinder. A spring in the valve urges passes the contact 54. However, should move the disc onto its seat so that as the lever swings ment of the positioner 36 downwardly be inter outwardly from the body the disc engages its seat to stop the flow of air to the cylinder. 30 fered with by jamming of the work or should it for some reason be impossible for the positioner The valve is provided with vent means so that to make a complete stroke, the lever 38 is stopped . when the disc is on its seat, pressure between so that contacts 54 and 56 are engaged whereby the valve and its cylinder is relieved whereby the magnet I30 is energized to pull pawl I28 up the piston and its rod may be returned to its wardly. Then slide I26 moves forwardly without inoperative position. moving said rod I22. In this way control lever Each of the valves I80, I82 and I86 are affixed 6 is not actuated and the transporting member to pairs of levers such as 200. These levers 200 2 is not moved forwardly to present improperly are swingable at upper ends on the main drive located work to the tool. shaft 68 while their lower ends are forked at Normally in each cycle of operation the rod 202 to straddle a rod 204 ?xed in frame members I 22 is moved by the pawl I28 50 that control mem I 0. Adjusting screws 206' in the forked ends ber 6 is actuated for bringing about movement of the members 260 engage opposite sides of the of the transporting member 2 and as the said rod 204 so that the lower ends of the levers 200 member 2 moves forwardly the lever I 42 moves may be moved back and forth to adjust the posi tion of the valves and their levers, such as I94, 45 away from the lever I84’ of the valve I84 where upon said valve is closed and spring 90 moves relative to cams 206, 208 and 2I0 which are ?xed clutch member 84 to disengage members 86 and on cam shaft 10. 88. This stops rotation of the cam shaft 68. ’ The cams referred to are so constructed and Each time the transporting member reaches related as to operate their respective valves in 50 its rear position the lever I84’ of valve I 84 is the desired timed relation. operated so that the cam shaft is operated for The valve I84 for cylinder I00 is supported by operating the various units as before described rod 26 and its lever I84’ is engaged for operation ' and as the transporting member moves forwardly of the valve by lever I42. the cam shaft is stopped. In operation the machine tool is put in opera In this way in each cycle of operation the cam tion and drive member 82 is continuously rotated. 55 shaft is rotated and then stopped. That is the tool 4 of the machine tool is rotated It will be noted that the slide I26 operates the while the mechanism of the machineltool is set rod I22 and thereby control lever 6 only when valve passes air to the cylinder to which it is connected. ' in operation and back and forth movements of the the positioner 36 is able to perform its function. transporting member 2 are under the control of In the event the member 36 is unable to func 60 control member 6. tion properly and for that reason slide I26 does The transporting member 2 in its rearward po not operate control member 6 the transporting sition causes lever I42 ‘to actuate valve I84 so member 2 remains in its rear position so that that air is supplied the clutch operating cylinder lever, I42 would be held open and the cam shaft _ I00. Said cylinder in its operation brings about G 5 ‘I0 would continue to operate. swinging of lever 92 so that member 84 is moved To prevent continued rotation of the cam shaft inwardly to engage 86 and 88. With drive mem ber 82 being in continuous rotation the cam shaft 10 through gears ‘I2, ‘I4 and ‘I8, 80 is now rotated whereby the several cams perform their func tions, The member 32 releasing the work W the cams 206 and 268 are operated so that valves I80 and I82 admit air to cylinders 42 and 48. Previ ously cam I24 acts on lever I2I and through rod I20 and lever I06 the slide 64 moves forwardly when the transporting member 2 remains in its rear position the rod I50 and plate I52 come into play in the following manner: As the slide I26 moves forwardly the plate I52 0 thereof engages collar I54 of rod I50 which is connected to lever I42 and moves said rod I50 forwardly to swing the lever I42 so that it re leases the lever I84' of valve I84 allowing it to 75 close.‘ Also the movement of the rod brings co1 '7 lar l5§§ thereof forwardly ofthe free end of the, pawl I'?g'lf whichpawlholdsitherod‘15? against rearward ‘movement'and'thereby lever I411~ is, held, drive, shaft, clutch mechanism for engaging said drive shaft‘and driving ‘memberfandoperating meansjoroperating said clutch‘ mechanism op against‘ spring _ I lit, from “ ‘engaging " valve _‘'lever erable"by”the"said1slide, each of saidoperating means‘, including‘a’, cylinder and conduits con '84,; Normally the ‘stud i368 on the transporting nected to 'sa‘idf cylinders having cam operated memberjin its forward__ and , rearward movements valveimeans therefor. ?exes the spring I66 of the pawl and is'arranged to move pawl I56’ out of the way of the ‘collar The, combination. of a machine tool having a_ rotatable to‘ol‘andislide movable towards and I56 on rearward movement. When the trans porting member is stationary in its rear, posi away therefrom with, a s'wingable' slide control lever_,thereforfand iw‘ork positioning and ‘holding tionthe pawl is allowed to functionv forjthe?ur ‘ ' ' means‘, ‘on’ is‘aid'f' nice‘, ‘having actuating means therefor with separate unitary operating mech The valves and their cams may be arranged rel anism therefor comprising, a frame construction, atively to bring about any desired ‘sequence of, 15 operating‘nie'ansfor" said control lever, a drive operations during a cycle of operation; thefore “ shaft'rot'atable', in said frame construction, con going being intended for purpose of disclosure. nect'ions‘f between said, drive shaft and ‘said op ' The invention may be embodiedin other spe eratingfineans, 'a‘ driving member rotatable on ci?c forms without departing from the essential saidi‘d'rivefsh?aft, clutch mechanism for engag characteristics thereof. Hence, the present em 20 ingsaid driv'e 'sha'ftf‘and driving member, and pose‘ described. ' '_ bodiments are therefore to be considered‘ in all respects merely as being illustrative and not as ' operati'n'gmeans for; operating said clutch mech being restrictive, the scope of the invention being mechanism and operating means therefor con anism' operable by" the said slide, saidiclutch indicated by the appended claims rather than‘by structed for, clutching operation as the slide the foregoing description, and all modi?cations 25 moves in one direction and arranged for one cycle and variations as fall within the meaning and of operation of the said drive shaft for each purview and range of equivalency of the appended saidrnovement of said slide. claims are therefore intended to, be embraced '5‘.'The combination of a machine tool having therein. . What it is desired toclaim and secure by Let ters Patent of the United States'is: 1. The combination of a machine tool, hav a rotatable tool and slide movable towards and 30 away therefrom with a swingable slide control lever therefor and work positioning and hold ing means on said slide having actuating means therefor’ with separate unitary operating mech ing a rotatable tool and slide movable towards and away therefrom with a swingable slide con anism therefor comprising, a frame construc tion, operating means for said control lever in cluding disengageable connections, a drive shaft rotatable in said frame construction, connec trol levertherefor and work positioning and hold ing means on said slide having actuating means therefor with separate unitary operating mecha nism therefor comprising, a frame construction, tionsbetween said drive shaft‘ and said operat operating means for said control lever, a drive ing‘meanfs‘, a, drivingmember rotatable on'said shaft rotatable in said frame construction, con 4-0 drive "shaft, clutch mechanism for engaging said nections between said drive shaft and 'saidoper ating means, a driving member rotatableon said drive shaft, clutch mechanism for engaging said drive shaft and driving member, and operating drive‘ shaft and‘clr'iving member, operating means for said clutch mechanism operable by said slide as it moves in onedirection, and means actuated by thef'work holding'arld positioning means for disengaging the disengageable connections, said means for operating said clutch mechanism oper able by the said slide. ' 2. The combination of a machinetool having a rotatable tool andslide movable‘ towards and away therefrom with a swingable slide control lever therefor and work positioning and holding means on said slide having actuating means‘ therefor with separate unitaryvoperating mech: anism therefor comprising, a frame construction, operating means for said control ‘lever including disengageable connections, a drive‘, shaft rotate" able in said frame construction, connections be tween said drive shaft and said operating means, a driving member rotatableon‘said drive shaft, clutch mechanism for engaging said drive shaft and driving member, operating means for, said clutch mechanism operable by said ,slide 'as'it moves one direction, and means actuatedby‘, the work holding andv positioning‘, means for dis engaging the disengageable connections. " 3. The combinationof a, machine‘, tool having a rotatable tool andslide movable; towards and away therefrom' with a swingable slide control, lever therefor and work positioning and holding means on said slide having actuating; means 59. disengageablefconnections including a rod se cured ‘to’ said lever having a member slidable thereon which is provided with a pawl engage able witha notch provided in said rod and the means ‘for engaging and,v disengaging said con nections including a, m'agnet'operably related to said liawl. ' ' ' ' 6Qv The ‘combination ofa machine ,tool having arotatable tool and slide movable towards and away therefrom with a swingable'slide control leverther'eforjand work positioning and holding means " on said. slide having actuating means therefor 'witli's'eparate unitary operating mech anism therefor comprising, a frame construction, operatingmeans‘ for ‘ said control‘ lever including disengageable connections, a drive shaft rotat abley'i'n said ‘frame construction, connections be tweenrsaid drive ‘shaft and said operating means, a-driving‘member' rotatable on said drive shaft, clutch ‘mecnamsmror' engaging said drive shaft and"d‘r'iving ‘member, operating means ‘for said clutch mechanism operable "by, said slide as it moves in one direction, and means'act‘uated by the work holding and, positioning means for dis therefor with separate unitary operating mech 70 engaging the; disengageable connections, said anism therefor cQmprisingQa frameconstruction, clutch‘ mechanism and _‘operating means therefor operating means for said control lever, afdrive constructed and arranged whereby said drive shaft rotatable in said frame construction, con shaft and driving member are engaged for oper nections between said ‘drive'sha'ft' and said‘op'er ation ofsaid; shaft through one‘ cycle of oper ating means, a driving member rotatable on said 75 arise, for. Bash, mpvemenibi thaslide in Said‘ one ' 2,413,781 9 10v direction and said disengageable connections ar ranged for disengagement as the said slide moves in an opposite direction. '7. The combination of a machine tool having slide and clutch means operable as said slide moves in one direction whereby said shaft is ro tated through the clutch mechanism for one cycle of operation, connections between said drive shaft I and control lever whereby said lever may be oper ated as the slide moves in one direction, disen gageable means in said connections, and means connecting said work positioning means and dis means on said slide having actuating means engageable means whereby the latter may be dis therefor with separate unitary operating mech anism therefor comprising, a frame construc 10 engaged by the former so that the control lever a rotatable tool and slide movable towards and away therefrom with a swingable slide control lever therefor and work positioning and holding tion, a drive shaft rotatable in said frame con struction having a drive member rotatable there on, clutch means for engaging said shaft and member and operative connections between said is not operated as the slide moves in said one direction. KENNETH H. POND.