US2445822A - Timing and positioning mechanism for dial feeding machines - Google Patents

Description

July 27, 1948. J. BRIECHLE TIMING AND POSITIONING MECHANISM FOR DIAL FEEDING MACHINES 8 Sheets-Sheet 1 Filed Oct. 16, 1946 INVENTOR.

sepiz Brieciz Ie J. BRIECHLE TIMING AND POSITIONING MECHANISM FOR DIAL FEEDING MACHINES July 27, 1948.

a Sheets-sheaf 2' Filed Oct. 16, 1946 INVENTOR. 7 Joseph Bria/lie IIII y 1948- J. BRIECHLE 2,445,822

TIMING AND POSITIQNING MECHANISM FOR DIAL FEEDING MACHINES Filed Oct. 16, 1946 8 Sheets-Sheet 3 Joseph Bm'eclz 1e July 27, 1948. J. BRIECHLE 2,445,822

TIMING AND POSITIONING MECHANISM FOR DIAL FEEDING MACHINES 8 Sheets-Sheet 4 INVEN TOR. Jasep/z Bria/12a HTTOR/VEYS.

July 27, 1948- J. BRIECHLE TIMING AND POSITIONING MECHANISM FOR DIAL FEEDING MACHINES Filed Oct. 16, 1946 8 Sheets-Sheet 5 INVENTOR.

I l L BY/bJfi/Z Bmiechie K ZM W July 27, 1948. J, ragg- 2,445,822

TIMING AND POSITIONING MECHANISM FOR DIAL FEEDING MACHINES Filed Oct. 16, 1946 8 Sheets-Sheet 6 INVEN TOR.

Joseph Braciz 16 BY July 27, 1948. J. BRIECHLE TIMING AND POSITIONING MEG 2,445,822 HANISM FOR DIAL FEEDING MACHINES 8 Sheets-Sheet '7 Filed Oct". 16, 1946 Mk. w mt r B 0 w m BY 22M,

llllliviiiili JIBRIECHEE 2,445,822

TIMING AND POSITIONING MECHANISM FOR DIAL FEEDING MACHINES 8 Sheets-Sheet 8 Filed Oct. 16, 1946 M r Fly 2.

RHTCHET WHEEL TURNS 0N5 770771 PflWL MOVEMENT (ncc l/RS may Rornr/o/v 0F Mnnv mm INVENTOR.

Joseph Bm'echie 1 4i 21' BY HTTJRNEYS.

Patented July 27, 1948 UNITED STATES PATENT OFFICE TIMING AND POSITIONING MECHANISM FOR DIAL FEEDING MACHINES Joseph Briechle, Floral Park, N. Y.

Application October 16, 1946, Serial No. 703,615

25 Claims. 1

My present invention relates to a timing and positioning mechanism especially adaptable for use in dial feeding machines and aims to provide certain improvements therein.

Timing; and positioning mechanisms of various types have been known and used for various purposes. Where these mechanisms were applied to dial feeding machines to control the period of dwell of the dial or in which the work to be acted upon was subjected to an operation for a predetermined period of time, various complicated means were employed and time consuming changeovers had to be resorted to when it was desired to change the timing cycle of the operation.

An Qbject of my present invention is to provide a timing and positioning mechanism in an intermittently movable dial type feeding machine whereby the time interval between successive movements of the dial can be varied without disassembling or substituting any machine elements. A further object is to provide a machine of the type set forth in which work pieces which are carried by the intermittently moving dial may be subjected to a heating, dipping or other treatment during a period of dwell of the dial and in which the timing cycle can be quickly changed to subject the part to be acted upon to any predetermined time period within the range of the machine. A further object is to provide a machine of the type set forth in which work pieces which are to be subjected to a heat ing treatment, will have a high frequency heating coil moved into operative relation to the work piece, the current switched on for a predetermined period of time, and the heating coil then removed'from its operative position and the work piece subsequently discharged from the machine in a Wholly automatic manner. A still further object is to provide a machine of the type set forth wherein the setting of the timing cycle may be accomplished by a simple adjustment of a dial, even during a heating cycle, without stopping the machine. A still further object is to provide in such machine means for controlling the movement of the heating coil to either move downwardly or upwardly into operative relation to the work piece, as desired. A still further object is to provide a machine of the type set forth which is relatively simple in construction and readily adaptable for acting on various types of articles where time cycle operations of different duration are involved.

The foregoing and other objects of my invention not specifically enumerated I accom- 2 plish with the mechanism hereinafter. described and shown in the accompanying drawings, wherein:

Figure l is a front elevation of a machineeme bodying my invention showing an arrangement for treating work pieces above their points of support.

Fig. 2' is a sideelevation of the machine shown in Fig. 1

Fig. 3 is a top plan view of the machine shown in Fig. 2.

Fig. 4. is a. side elevation of the machine simi; lar to Fig. 2 showing, an arrangement for treat: ing work pieces. below their point of support.

Fig. 5 is a fractional front elevation of the.

machineshownin Fig. 1 ona somewhatenl arged scale, with thef-ront cover-plate removed.

Fig. 6 is a. fractional, side elevation of themachine shown in Fig. 2 on a. somewhat enlarged scale, with the side. cover-plate. partly broken away.

Fig. '7 is a section as seen when taken substantially along the planes of the broken, line 1-1 of Fig. 6.

Fig. 3 is a section as seen when taken, sub; stantially along the plane of the line 8.8 of Fig. 5.

Fig. 9 is an axial section of the cam stud and parts assembled thereon.

Figs. 10 and 11 show a front elevation and a side elevation, respectively, of the ratchet wheel pawls and pawl stud assembly.

Figs. 12 and 13 show a front elevation and a side elevation, respectively, of the, plunger lever,

lock pin lever, locking link and trigger lever as sembly.

Figs. 14, 15 and 1-6 show a topplan, a side elevation and a front elevation, respectively, of the index cam lever.

Figs. 1'7 and 18. show a front elevation and a sideelevation, respectively, of the cam lever and trigger assembly.

Figs. 19 and 20 show a side elevation and a top plan, respectively, of the trigger. lever.

Fig. 21 is a graph showing a development of the movements of the various mechanisms of the machine through a 360. rotation. of the index cam.

In the various figures of the drawings. the same reference numeralsv are used to designate corresponding parts.

Referring now. to Figs. 1 to 9 of the drawings, the numeral I indicates a pedestal or support on the top of which is mounted a housing 2 having a protruding annular dome 2a, a, removable front plate 3 and a removable side plate l. Dependingly supported from the housing 2 is an electric motor 5, on the shaft of which is fixedly mounted a driving pinion 6 which is in mesh with a driving gear I mounted for free rotation on a hollow drive shaft 8 supported in suitable bearings 9, through which drive shaft slidably extends a clutch rod 10. Secured to the outer end of the drive shaft is a hand wheel ll by means of which the machine may be manually turned over. Also fixedly mounted on the drive shaft intermediate the ends thereof is a pinion I2 in mesh with a cam gear I3 which is secured to an index cam M, the cam gear and index cam being mounted to rotate on a fixed stud shaft l5. Rotation of the drive shaft 8 by the driving gear 1 may be provided by any suitable coupling means and, as herein shown, such driving motion is obtained through the medium of a clutch mechanism consisting of a clutch wedge l6 fixedly mounted on the clutch rod, which clutch rod, when moved outwardly with respect to the front of the machine by pulling on a clutch knob l1, engages the rounded head of a stud I8 (Figs. 6 and 7) carried by a clutch lever I9, which lever is mounted on a drive pin 20 extending through a drive disk 2| fixedly mounted on the drive shaft 8, the drive pin 20 having a square head (not shown) engaging within a slot of an expansion ring Zia, the outer periphery of said ring being adapted to engage an inner peripheral surface of the driving gear I. It will thus be seen that when the clutch knob I? is pulled out wardly, the driving gear 1 will be clutched to the drive disk 2| to rotate drive shaft 8 and through the pinion ll drive cam gear 13 and index cam M. The driving pinion 6 and driving gear 1 may be suitably enclosed within a guard 22.

The index cam 14 has a cam groove 23 cut in its peripheral surface, said groove being divided into four parts providing successive rise, rest, drop and rest portions of approximately 90 each, as best shown in Fig. 21, the rise and drop portions being 90 or less and the rest portions being 90 or more of cam rotation. Actuated by the cam groove 23 are two cam levers 24 and 25 having cam rollers 26 and 21, respectively, seating in the cam groove at an angular distance of 90 apart, so that alternatingly one lever is moving while the other one is at rest. The cam lever 25 is designated the index cam lever and is pivotally mounted on a hollow dial stud 28 and thus oscillates on an axis common with that of an index dial 29 which is rotatably mounted on said dial stud above the housing 2. The other cam lever 24 is supported to freely oscillate on a horizontal shaft 30 without the shaft doing so until the shaft is oscillated in a manner hereinafter described.

The cam lever 24 is of the form shown in Figs. 17 and 18 and has pivotally mounted at the end of the free arm thereof a trigger 3! having four arms 32, 33, 3d and 35. The trigger is held on the end of said cam lever by a headed stud (iii. A friction pin 31 extends through a. hole in the trigger and into a drilled opening in the lever 2 the said friction pin having a head 38 which is held in bearing contact with the face of the trigger by a tension spring 39 to prevent movement of the trigger by the action of gravity. The friction pin 31 has a reduced neck 31a which is slightly less in diameter than the drilled opening in the trigger through which it extends and. thereby limits the angular movement of the trigger. The arms 32 and 33 of the'trigger each carry an adjustable set screw 40, one facing a finger Mo on a ratchet wheel ll and the other being in the circular path of an arm ll! on a ratchet lever 43.

Fastened to the shaft 36 and adjacent tothe cam lever 2% is a lock pin lever fi l through one end of which a tension spring 65 applies torque to the shaft 3E3. Also fastened to the shaft 30 and straddled by the cam lever 2 2 is a trigger lever 48. To limit the rotation in a clockwise direction of the lock pin lever ee caused by the tension of the spring 55, there is provided a set screw 41 extending up through the base of the housing 2, the adjustment of said screw being set by a lock nut 8. The adjustment of the set screw is such that the space between the arm 35 of the trigger and the protruding lip iii of the trigger lever it measures about .010 inch. This space is indicated, greatly magnified, by the letter A on Fig. 6 of the drawings. The purpose of this space will presently be made apparent. Also fixedly mounted on the shaft 39 outside of the housing 2 is a plunger lever 5?! having a T-shaped slot 5! therein, within which is mounted by a bolt am one end of a connecting rod 52, the other end of which is adapted for selective connection to either of two points 53a and 53?) on a gear sector 53, the teeth of which are in mesh with a rack E l carried by a plunger tube 55,

Pivotally connected at 55 to the lock pin lever 54, is one end of a locking link El, the opposite end of which is pivotally connected at 53 to one end of a dial lock pin 59 which slidably extends through a bearing opening 59a in the top of the housing 2, the other end of the lock pin being reduced and adapted for engagement in one of the twelve equally spaced circumferentially disposed openings fill in the index dial 29. The lock pin 59 in its surface intermediate the ends thereof is formed with a recess 5!! providing upper and lower abutment shoulders 62. The locking link 51 in proximity to its upper end is formed with a projecting nose lit, and opposite said nose with an arm 64 to which is connected a knockout stud 55 adapted to engage and operate a knockout rod 66 extending centrally through the dial stud 28.

The index cam lever 25, as shown in Figs. 14, 15 and 16, has at one end thereof a downwardly projecting hub portion 67 engaging over the dial stud 28, at its opposite end a projecting nose 6d, and intermediate its ends a bearing 59 for the cam roller 21. Also intermediate its ends the lever 25 has an upwardly directed projection l'll having a bore ll therethrough and a cutout facial recess 12 which intersects the bore. Floatingly mounted to slide in the bore 'll' of the projection 'l'll is an index pin 13 having a transverse slot 13a intermediate its ends and facing the recess 72 in said projection. For limiting the movement of the index cam lever 25 and checking excess movement due to the momentum thereof as it is moved by the cam, there is provided a stop screw lock i l mounted on a rigid rib 15 carried by the housing. The stop screw lock consists of a plate 16 having a heavy set screw 16a threaded therethrough and through the rib for engagement with the nose 68 of the lever 25, and said lock plate is locked in position by a locking screw ll passing through the plate and engaging inthe rib.

Mounted on the housing 2 within the annular dome 2a at diametrically opposite points of the dial stud are a pair of bearing blocks 18 (Fig. 7) having aligned openings which receive pivot pins 19 secured in diametrical alignment on a shift lever Bil, one end M of which is of reduced thickness for engagement in the recess iii in the lock pin 59 and the opposite end 32 of which is of reduced thickness. .for oscillating engagement :in the slot.'l3a.in theiindex pin I3. The shift lever adjacent. the .end 8| :has a pair of'spaced openings therethrough'providing an anchorage for one end of a 'tensioncoil spring 83, the. opposite end of which is anchored to a pin 34 carried by the looking link :51. The spring 83 insures downward movement of the end 8 land simultaneous upward movement .of the endBZ: of the shift lever when the lock pin is withdrawn from an opening (iii in the dial. In other words,..as the shift lever 89 is moved about its pivot pins 19 the lock pin 59 and the index pin 73 will be respectively moved into andout .of engagement with openings 63 in the dial, and vice versa,

Referringnow to Figs. 5, 6,8 and 9 of the drawings, the stud shaft 1 5 isfixedly supported in the housingl andhas rotatably mounted thereon the cam .geanl3, the index cam I4 and the ratchet wheel II. As shown in Fig. 9, said parts I3, i i and 4| are mounted on a bushing 35 between a thrust bearing 85 and a thrust washer 81 which latter is;held in position by a stud nut 88 and a lock nut 89, the thrust washer being pinned onto the end of the bushing 85 by pins 88. The rear end of the .stud shaft I5 has a transverse slot iii milled therein for a purpose which will presently appear. The forward end of the stud shaft I5 is screw-threaded and has mounted thereon a knob screw 94 which rotatably supports a dial knob 93 which is pinned to a timing dial 82, the timing dial being held in rotatable position by a stud nut 95 anda lock nutQS threaded on the stud shaft.

The front face of thetiming dial is calibrated in seconds, the setting. of the dial being made by rotating it relative to an index arrow 91 on the front plate 3, within an opening 98 in which the timing dial seats. The rear face of the timing dial is formed withratchet teeth 59 for cooperation with a tooth I09 on a timing dial pawl I OI (Fig. 8), hereinafter'more fully described. Also mounted on the rear face of the timing dial is a timing pin I02 which, by engagement with a timing pin Mo on the ratchet wheel, serves to stop rotating of the ratchet wheel when it moves in a counterclockwise direction. For limiting the clockwise movement of the ratchetwheel and the timing dial there is provided a ratchet stop Mb mounted in the housing 2 and adapted for engaging the timing pin Ma. For preventing movement of the ratchet wheel M beyond the zero position of the timing dial, which overrunning would cause a jamming of the stop pin Ma with the ratchet stop Nb and also a jamming of the ratchet finger Mcwith the arm 32 of the trigger and result in a breaking of certain of the machine parts, the ratchet wheel is made tooth" less as shown at 4 Id for a predetermined angular distance to the left of the first tooth.

The cam gear I3 has a cam groove I03 in its rear face, said cam gear having a single drop therein. A cam roll HM (Figs. 5, 6, and 11) seating in said cam groove is carried by one end of a cam lever I65, the other end of which is fast on a rotatable stud I06. The stud I06 near its other end fixedly carries the ratchet lever 43 previously described, which, at its upper end, has nivotally mounted thereon an upper pawl I JI adapted to engage: the teeth of ratchet wheel 4| whilea lower pawl I08 also adapted to engage the ratchet teeth of the ratchet wheel is pivotally mounted on the stud I06. The lower pawl Hi8 has a tail I09 for cooperative engagement with theiunderside of the nose63ron theilocking. link spring HI so that the tooth I00 on pawl IIlI will engage the ratchet teeth 99 on the reariof the To disengage the tooth I00 from the I timing dial. timing dial ratchet teeth to permit resetting of the timing dial by movement in a counterclockwise direction, there is provided a push button it which extends through the front plate (Figs. 1 and 8).

The plunger tube 55 is guided in its moments in upper bearing I I3 and a lower bearing H4 mounted on a plunger bracket H5 secured to the rear wall of the housing 2 by bolts H4, the lower bearing being open at its rear to straddle the rack and provide for engagement therewith. by the gear sector 53.

The gear sector 53 is pivotally mounted on a stud H! supported in a bearing H8, on the bracket H5 and has two points of connections etc and 5312 with the connecting lever 52 depending upon whether it is desired to move the plunger tube upwardly or downwardly into and out of operative position, respectively. As shown in 6, the connection is such as will move the plunger tube upwardly out of operative position during the indexing of the machine, presently to be described. To balance the thrust of the gear sector 53 in its movements there is mounted on the stud ill a counterweight bracket Ilfia which carries a counterweight H9. For mounting a heating coil IZiI, other appliance or container to move with the plunger tube, there is provided a split clamp I21 adapted for adjustable positioning on the plunger tube by clamping bolt 22. Secured to the clamp I2! is a heating coil plate iZIa.

Where an induction heating coil is to be used, ineaiiis are provided for making and breaking the electric circuit so as to supply current only when the coil is in operative relation to a work piece to be acted upon. As herein shown, said means comprises a mercury switch or the like I23 sup ported on a bracket I24 which is movable with the clutch rod I ii, said bracket being mounted on the clutch rod between the clutch wedge I6 a collar To the end of the bracket 12d IE5 is pivotally connected the lower end of lever which carries a switch holder strap which, in turn, holds the switch I23 onto and movable with said lever. Pivotally connected to the upper end of the lever 52'! by a stud I2'Ia is link !29 having an opening therethrough at a right angle to the pivot, through which open- .1. the threaded end of a switch rod Itil extends and is held by a nut itl. The switch rod is slidably supported in a bearing 32 in an upstanding I33 on the plunger bracket HE and in bearing (not shown) in the housing 2. Fixedly mounted on the switch rod between the bearings are a. pair of spaced collars I34 and !35 and on the switch rod between the collar I35 and the bearing I32 is a tension spring I36 urging the switch rod to the left against the nose on a finger Itl fixed to the lock pin lever 64. The g I35 is lighter than the spring 45, hence r it? will hold the switch rod in its rear p -iition except when the finger is moved counterclockwise as the shaft 363 is so moved. whereupon the spring 136 will move the switch rod forwardly or to the left as viewed in Figs. 6

'7. The collar 34 serves as a stop by engagement with the housing to limit the forward movementx of the switch rod.

Also mounted on the stud. Illa-is. a timing dial pawl hingellt to which one end of. the timing dial pawl IGI is pivoted-and urgedby a As seen in Figs. 1, 2, 3 and 5, there is mounted on the index dial 29 by bolts ass and nuts I39, a dial plate Ml having work supporting means M2 corresponding in number and angular spacing circumferentially, to the openings 60 in said index dial. The dial plate M! has a central opening i i-la therein through which extends a flanged colar Hilia which serves to rotatably hold the index dial 29 against the top of the housing by a nut Mt. These work supporting means will be of such form as will support a, work piece to be acted upon. In Fig. 4 the dial plate M3 is held in spaced relation to the top of the index dial by spacing elements HM, nuts Hi5 and bolts M6, and the work holding means I61 extend downwardly from the dial plate and are correspondingly disposed as are the work holding means M2.

In setting up the machine, it is essential that the index pin it carried by the index cam lever will be in vertical alinement with an opening (iii in the index dial to move into said opening when indexing is to take place. This is accomplished. by adjustment of the cam stud shaft is which carries the index cam i4, and to insure that such adjustment will not change dur-- ing operation of the machine said cam stud shaft is locked in set position by inserting an adjusting plate Hi8 into slot 9! in said stud shaft and locking said plate in position with a screw Mt tightened against the end of the stud shaft hearing 558 projecting from the housing 2.

Operation-Let it be assumed that the machine illustrated in Figs. 1, and 3 to 8 is to be used for completing the soldering operation on assembled units or work pieces [5i each previously manually positioned in a work supporting means Hi2 and supported thereby. The machine at rest will have its respective parts in the positions shown in said figures, the mercury switch 523 being in off position tilted downwardly to the left, as shown in Fig. 6. Now let it be further assumed that the heating operation will require five seconds. The timing dial is set at 5 with respect to the index arrow ii? (Fig. l). The motor is set in operation, and upon pulling outwardly on the knob i? on the clutch rod iii. the clutch wedge 56 will engage the head of stud it! to move clutch lever 99 to operate the clutch, whereby driving gear I through drive disc 29 will rotate drive shaft 8 and through pinion i2 will rotate cam gear l3 and index cam i i. As the clutch rod is pulled outwardly the switch lever i2l will pivot about stud Mia and the switch will be tilted downwardly to the right in Fig, 6 to on position since the switch rod l3l) will be held in its rearmost position by the finger I31 on the lock pin lever 44, which latter is biased by the spring 45 in a clockwise direction and holds the shaft so at the limit of its rotation in a clockwise direction. The machine will thus be performing the heating part of a cycle. The speed of rotation of cam gear l3 and index cam it, as previously stated, is controlled at 60 R. P. M. in a counterclockwise direction when viewed from the front of the machine and for each revolution of the cam gear the ratchet lever id will be oscillated, once, and the ratchet wheel will be rotated one tooth in a clockwise direction by the upper pawl Mil, while the lower pawl H13 will hold the ratchet wheel against its tendency to rotate in a counterclockwise direction because of its frictional engagement with the rotating index cam l4. Simultaneously with said action, the cam lever 24 will be freely oscillated on shaft 36 and the trigger 3| carried by said cam lever will oscillate through an arc, extending forwardly-rearwardly of the machine, in which are the arm 35 moves clear of the protruding lip '39 of the trigger lever 46. As the index cam and cam gear completes five revolutions the ratchet wheel will have been rotated five notches, bringing the finger 41a of the ratchet wheel into contact with the set screw ii) on arm 32 of the trigger to move the end of arm 35 over and into the path of the protruding lip 59 on the trigger lever M5. The clearance A (Fig. 6) insures clearance for the end of the trigger arm so that such movement can take place. In order to permit this changed position of the trigger, the roller 26 of cam lever 2 must be in its rear position as shown in Fig. 6 so that the space A is maintained. Now, as the cam roller moves toward its front position, a series of operations occur simultaneously, to wit: The downward movement of the trigger moves the trigger lever downwardly rotating the shaft 36 and with it lock pin lever 6 5 against the tension of spring 45; the locking link 5? will withdraw the lock pin 59 from the index dial; the index pin 73 will be moved into an opening in the index dial by the shift lever 36; the plunger lever 50, through the connecting lever 52 and gear sector 53 will move the heating coil I26 on the plunger tube 55 upwardly away from the work piece; the switch I23 will be tilted to open position by the movement of the switch rod to the left by the spring I36; the knock--out rod 66 will be moved upwardly by the stud 65 to discharge a work piece from a work holding means beyond the one at the heating station in a manner generally known in dial feed machines and not shown herein, the lower ratchet pawl i618 will be forced to leave the ratchet wheel by the shoulder on the nose 63 of the descending locking link engaging the tail of said pawl Hi8; said pawl its will force the upper pawl it! to leave the ratchet wheel whereupon the ratchet wheel will begin to return to its initial position where the timing pin Ma on the ratchet wheel will engage the timing pin its on the timing dial.

When all these movements are completed, the index cam lever 25 will turn the index dial since the index pin i3 will now be in an index opening fill in the dial. Upon completion of the indexing, the series of actions set forth in the preceding paragraph will be reversed and after they are accomplished, the ratchet cam lever I05 will again push the upper pawl it]? forward to reach for a tooth and while it does so will push against the set screw it on arm 33 of the trigger 3| to move the latter to its former position.

Since the index cam makes 60 R. P. M. the divisions on the timing dial each indicate the heating time in seconds, and the setting of the timing dial will indicate the elapsed time in seconds that the current will be on during the period of dwell of the index dial when the heating coil is in operative relation to a work piece.

Should it be desired to decrease the heating cycle it is merely necessary to rotate the timing dial in a clockwise direction since in doing so the tooth mil on the timing dial pawl HJI will ride over the ratchet teeth on the rear of the timing dial. However, should it be desired to increase the heating cycle, it is necessary to push inwardly on the push button H2 to disengage the tooth lilll from the timing dial ratchet teeth to permit rotation of the timing dial in a counterclockwise direction.

Although ,I have shown and described a dial feeding machine with mechanism intended for performing a heating operation provided by high frequency current during the dwell period of the dial, it will be understood that the machine would lend itself to other operations such as dipping parts into liquids such as paints, plastic compositions, acid or the like. It will also be appreciated that there may be more than one operating station disposed about the dial at which a work piece may be operated upon. I-Ience, while I have shown and described a preferred embodiment of my invention, I do not intendthat the disclosure be considered limitative, since modifications may be'made therein Within the range of engineering skill without departing from the spirit of my invention.

What I claim is:

1. In an intermittently movable dial type machine, a driving shaft rotatable at a controlled constant speed, a dial, means operable by the shaft for intermittently moving the dial about its axis through equal central angles, means for intermittently holding the dial at rest fora predetermined interval of time and means for selectively changing the time intervals during which the dial is held at rest, said last named means being operable Without dismantling any of the machine elements.

2. In an intermittently movable dial type machine, a driving shaft rotatable at a controlled constant speed, a dial, means operable by the shaft for intermittently moving the dial about its axis through equal central angles, means for intermittently holding the dial at rest for a predetermined interval of time and means for selectively changing the time intervals during which the dial is held at rest, said last named means being adjustable while the machine is in operation.

3. In an intermittently movable dial type ma-v chine, a rotatable driving shaft, a dial and means for intermittently moving the dial about its axis through equal central angles and for intermittently holding the dial at rest for a predetermined interval of time, comprising a rotatable index cam operable by the driving shaft, said cam having successive rise, rest, drop and rest portions and two cam levers operable by the movement of the cam, said cam levers being so disposed that their movements are out of phase to each other by 90 of cam-rotation.

l. An intermittently movable dial type machine according to-claim 3 wherein the rise and drop portions of the cam are 90 or less and the rest portions of the cam are 90 or more of cam rotation.

5. An intermittently movable dial type machine, a substantially horizontally disposed dial having a plurality of work-supporting means equally spaced angularly around the dial, means for intermittently moving the dial about its axis through a central angle equal to the space between two work-supporting means, means for intermittently holding the dial at rest for a predetermined interval of time, means for selectively changing'the time interval during which the dial is held at rest, a station at which a work piece supported by the dial may be acted upon during its period of dwell and means at said station movable into and out of operative relation to a work piece during its period of dwell at said station, said last named means being selectively adjustable to move either upwardly or downwardly into operative relation to a workpiece supported on the dial,

6. In an intermittently movabledial type machine, a dial, a rotatable index cam having successive rise, rest, drop and rest portions the rise and drop portions being or less and the rest portions being 90 or more of-cam rotation, two cam levers engaging successive cam surfaces and disposed so that their movements are out of phase to each other by 90 of cam rotation, dial indexing means operatively associated with one cam lever, dial locking means operatively associated with the other-cam lever, means for holding the dial locking means in engagement with the dial while the dialindexing means is held out of engagement with the dial, and vice versa, means for normally holding the dial locking means and the dial indexing means non-responsive to the movement of the cam levers withwhich' they are associated, and means operable at a predetermined time interval for releasing the last mentionedholding means and rendering the dial locking means and-the dial-indexing means operative to the respective movements of the cam levers during one revolution of the index cam.

7. An intermittently movable dial type machine according to claim 6, wherein the dial locking means comprises-a pin which is positively movable into dial locking position, the'dial indexing means comprises a pin which is float ingly supported, and a swivelly mounted shift lever operatively engages both pins to simultaneously move them in opposite directions.

8. An intermittently movable dial type machine according to claim 6 wherein the means for normally holding the dial locking-means in dial locking position comprisesa shaft upon which is mounted the cam lever which is operatively associated withthe dial locking means through a lever fixed on said shaft and a link pivotally connected to said lever and to a dial lock pin, and spring means connected to said lever operating to hold the shaft against rotation in a direction opposite'to that against which-said spring acts.

9. An intermittently-movable =dial type machine according to'claim 6, whereinthe means fornormally holding the dial locking means in engagementwith the dial comprises a shaft upon which is mounted the cam lever-which is operatively associated with the dial locking means through a lever fixed on said shaft, spring means biasing said lever to hold the shaft against rotation in a direction opposite to the biasing action of the spring, a trigger lever fixed on said shaft and a trigger carried by the cam lever and oscillatable therewith and normally held, out of engagement with the trigger lever, said trigger being movable at the predetermined time'interval'to engage the trigger lever.

10. An intermittently movable dial type machine according to claim 6 wherein the means for releasing the holding means for the dial locking means and .the dial indexing means includes means which are adjustable to vary the time interval between successive operations of said dial locking and dial indexing means for varying the intermittent time movements of :the dial.

11. An intermittently movable dial type machine according to claim-6 wherein the means for-releasing the holding means for the dial lock-- ing means and the-dial indexing means comprises a settable timing dial, a ratchet wheel which'is frictionally mounted for rotation withithef'index cam, pawls for imparting a step by step rotation to the ratchet wheel in oppositionto its direction of frictional rotation, and trip means operable by the ratchet wheel.

12. An intermittently movable dial type machine according to claim 6 wherein the means for releasing the holding means for the dial locking means and the dial indexing means comprises a settable timing dial, a ratchet wheel which is frictionally mounted for rotation with the index cam, two superposed pawls, one for imparting a step by step rotation to the ratchet wheel in opposition to its direction of frictional rotation and the other for holding the ratchet wheel against reverse movement during such step by step rotation, a lever for disengaging the pawls from the ratchet wheel, and trip means operable by the ratchet wheel.

13. An intermittently movable dial type machine according to claim 6 wherein the means for releasing the holding means for the dial locking means and the dial indexing means comprises a settable timing dial, a ratchet wheel which is frictionally mounted for rotation with the index cam, pawls for imparting a step by step rotation to the ratchet wheel in opposition to its direction of frictional rotation, trip means for releasing the engagement of the pawls with the ratchet wheel whereby said ratchet wheel resumes its frictional rotation, and cooperating means on the timing dial and on the ratchet wheel for stopping at a predetermined point the frictional rotation of the ratchet wheel.

14. An intermittently movable dial type machine according to claim 6, wherein the means for normally holding the dial locking means in engagement with the dial comprises a shaft upon which is mounted the cam lever which is operatively associated with the dial locking means through a lever fixed on said shaft, spring means biasing said lever to hold the shaft against rotation in a direction opposite to the biasing action of the spring, a trigger lever fixed on said shaft and a trigger carried by the cam lever and oscillatable therewith and normally held out of engagement with the trigger lever, and the means for releasing the holding means for the dial locking means and the dial indexing means comprises a settable timing dial, a ratchet wheel which is frictionally mounted for rotation with the index cam, pawls for imparting a step by step rotation to the ratchet wheel in opposition to its direction of frictional rotation and means on the ratchet wheel for engaging and moving the trigger into engagement with the trigger lever after a predetermined pawl-imparted movement to the ratchet wheel.

15. An intermittent timing and positioning mechanism comprising a rotatable index cam having successive rise, rest, drop and rest portions the rise and drop portions being 90 or less and the rest portions being 90 or more of cam rotation, a shaft, a cam lever mounted on the shaft to oscillate as the cam lever rides over the cam surfaces, means for holding the shaft normally non-responsive to the movements of the cam lever, operating means associated with the shaft and operable as the shaft is oscillated, spring means biasing the shaft against rotation in a direction opposite to that in. which it is biased, and means operable at a predetermined time interval for rendering the shaft rotatable in response to the movement of the cam lever in opposition to the spring-biasing action during one revolution of the cam.

16. An intermittent timing and positioning mechanism according to claim 15 wherein the operating means associated with the shaft comprises a reciprocable plunger.

17. An intermittent timing and positioning mechanism according to claim 15 wherein the operating means associated with the shaft c0mprises a lever fixed on the shaft, a pivoted gear sector, a link connecting the lever to the gearsector and a plunger provided with a rack in mesh with the gear sector.

18. An intermittent timing and positioning mechanism according to claim 15 wherein the operating means associated with the shaft comprises a movable high frequency induction coil, a switch for supplying current to said coil, and means operable by the rotation of the shaft for moving the induction coil and. controlling the operation of the switch.

19. An intermittent timing and positioning mechanism according to claim 15 wherein the cam lever carries a trigger adapted to pivot on an axis transverse to the cam lever shaft, and said haft has a projection fixed thereto, the cam lever normally oscillating the trigger clear of the projection and said trigger being movable about its pivot on the cam lever at the predetermined time intervals to engage the projection on the shaft to rotate the shaft in opposition to the spring-biasing action thereon.

20. An intermittent timin and positioning mechanism according to claim 15 wherein the means operable at a predetermined time inter-val for rendering the shaft rotatable in response to the movements of the cam includes mean which are adjustable to vary the time interval between successive operations which rotate the shaft.

21. An intermittent timing and positioning mechanism according to claim 15 wherein the means operable at a predetermined time interval for rendering the shaft rotatable in response to the movements of the cam comprises a rotatable timing dial, a ratchet wheel which is frictionally mounted for rotation with the index cam, a second cam rotatable with the index cam, a pawl controlled by said second cam for imparting a step by step rotation to the ratchet wheel in opposition to its direction of frictional rotation, and trip means operable by the ratchet Wheel after it has been advanced a predetermined number of teeth.

22. An intermittently movable dial type machine comprising a dial having a plurality of work supporting means equally spaced angularly around the dial, means for intermittently moving the dial about its axis through a central angle equal to the space between two work supporting means and for holding the dial at rest for a predetermined interval of time, a station at which a work piece movable with the dial may be acted upon during its period of dwell, means at said station movable into and out of operative relation to a work piece during its period of dwell at said station, said last mentioned means being operable substantially in synchronism with the movement of the dial, and a rotatable index cam and a time control mechanism for controlling the synchronous movement of the dial and the means at the station for operating upon a work piece during its period of dwell.

23. An intermittently movable dial type machine according to claim 22 which includes means for varying the time interval between successive movements of the dial and the synchronous movements of the means at the station without disassembling any of the machine elements.

24. An intermittently movable dial type ma- 13 chine according to claim 22 wherein the index cam controls the movements of the dial and the operating means at the station, and a second cam rotatable with the index cam operates the time control mechanism.

25. An intermittently movable dial type machine according to claim 22 wherein the time control mechanism comprises a rotatable and settable timing dial mounted on a common axis with the rotatable index cam shaft, a ratchet Wheel which is frictionally mounted for rotation with the index cam, a second cam rotatable with the index cam, a pawl controlled by said second cam for imparting a step by step rotation to the ratchet wheel in opposition to its direction of frictional rotation, the movement of the ratchet wheel bearing a direct time relation to the R. P. M. of the index cam, means for releasing the engagement REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,182,799 Farr Dec. 12, 1939 2,361,517 White et a1 Oct. 31, 1944

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