US1572932A

US1572932A - Counting head

Info

Publication number: US1572932A
Application number: US694194A
Authority: US
Inventors: Harry C Jones
Original assignee: LITHOPRINTEX CORP
Current assignee: LITHOPRINTEX Corp
Priority date: 1924-02-21
Filing date: 1924-02-21
Publication date: 1926-02-16
Anticipated expiration: 1943-02-16

Description

Feb. 1'5 192%. 5a. mu s COUNTING HEAD Filed Feb. 21, 1924.- 4 Sheeis'Sheea l INVENTOR Feb. 16 1926.

H. C. JQNEEES COUNTING HEAD Filed Feb. 21, 1.924

4 sheet -sheet 2 INVENTOR- "W YORK,

ASSIGNOR T0 LITHQPRINTEX GOR- COUNTING HEAD.

Applicsllon fled February Be it. known that; l, .llsnnr C. Jones. u. citizen of the liniled. 5% ales, and resident of llarchmonfi. in the couni'y oi" llesecl'icsler and Stale of New York, have inwnicd certain. ncv and useful linprovcinonis in (mint ing Heads, of which lhe following" is n. specification.

My invention relates to counting; heads, and more particularly lo counting heads for counting: revolulzions and fractions of a revolution of an operating shaft sud for arresting' the shaft from -further movement alter it has own rotuied a given number of rcvolotions.

lily invention adapted to be used .vi variety of machines in which s me oper ving part is to be arrested from further movement after it has moved ihrough u prciletjcrinineil distance or moved through is predetermined number of cycles of cpcrulion us the case may he.

More particularly it is adapted with machines in which the trceil movement of one partmust be held narrow limits, such as, for mounple, photocompassing machines, SiO ".Ll1Ll-l'(3: )(%li, mm chines, .ifll'llQS, milling nisc lines, elm, but in the form herein illustrated the invention is especially useful ifor, and is intended to he used in connection with, What is known s photocoinpassing machine such is shown and described in my co-pending application Serial No. 699,167, filed March 14, 19:34. in which machine a negative is provideo Wl'iich must be moved between exposures Wlill accuracy in front of sensitized surface so to properly position upon said surface prints of objects or l i graphed from ihe tized surface.

One of the objects of my invention is 'to provide an efficient. and durable counting 7 end by means of which after an operating shaft has been rotated a given number of revolutions it will be positively srreslcd from further opcrafion and lhc counting me hanism may be reset lo again arrest the haft after it has been moved through the some niunbcr of revolutions, .und. so on.

Another object of lhe'iuvcntion is to pro- $e1ial No. 894,194.

ride 21 counting head by means of which a 'predcterniined number of colnplele revolutions and. fractions oi as revolution. of the shaft may be. permitted and then the shell. positively arrested from further operation, and in. which the parts may be readily reset for ii duplicate counting operation.

fwl ill another object of the invention is to provide means when motive power is used for drivii: the shaft the inotove power may nulonmtically he cut oil a shori, intervalibefore the positive arresting operation takes PlzlCC.

The invention consists in the novel feszind combination of parts which are miller shown and described. in their prc u-reil horns and the invention is more particularly poiulcd out in the appended, cltfnis.

Further objects and advantages of the invention will more fully appear from the following description taken-in connec'iion V 'th the accompanying drawings, illustreh by my of example the preferred ezubediinent of (he im 'ention, and, in which Fig. l is ii front elevation.

Fig. 2 is a section on line 2-2 of Fig. 1.

F 3 is a. sectional View showing details of the cam locking ring.

s; 1s a sectional view looking from the rear and showing the details of the riders. Fig. 5 is a sectional View showing details of a cut out switch:

Fig. 6 is a View showing details of a cut out switch and locking" means:

7 is another View showing some details as Fig. 6: I

Fig. 8 ise diagrammatic sketch showing the electric circuit. of a. motive mea-ns for driving the shaft:

Fig. 9 shows a modification and. I

Fig. 10 shows a modification of 9.

Referring lo the drawings (Figs. 1 and 2). l is the shaft whose rotation is 'to arrested after a predetermined number of revolutions or/ancl a fraction of a rcvolulionlms hen completed. Suitable motive means such as anelectric motor 2 is provided for drivingthe shaft through any suitable gear train such as a, spur gear 8 I shaft 1.

. shaft 1 is supported at its outer end by a thereto. A spur gear the motor, an idle l eyed to the shaft of slidably mounted on gear {tkeyed to hub 5 axle 5 and driven spur gear (3 secured to The sliding gear 1 acts as a means of disconnecting the motive means from the shaft 1 and is adapted to be held either in orout of mesh with gears 3 and 6. The

plate 7 bolted to any suitable part of the machine such asat 8, and the shaft is preferably .directly supported by antifriction. means such as ball race bearing 2) which is mounted in a recess in plate 7.

A sleeve 10 (Fig. 2 carrying a flange 11 bearing teeth or serrations 11 is-secured to shaft 1 by suitable means such as a key 12. A spur gear 1 1, in this instance having 101 teeth,'and-formed on a hub 13, is'mounted on sleeve 10 free 'to rotate with respect 15 having one or more teeth less than gear 14, or in this instance 100 teeth, and formed 'on a hub 16, is

mounted on hub 13 free to rotate with re- 7 spect thereto. An idle gear 17 (Fig. 1) is 7' holes 28 and dial the periphery of this dial are serrations which in this case are 100 in. number,

mounted on a stationary member such as plate 7 and meshes with gears 14 and 15. An index member '18'..for indicating complete revolutions, and preferably in the geperal form of a disc, is mounted on hub 113' to rotate with respect thereto and 13 held on hub 16, which in turn is heldon hub 13 by a second index member 19 for indicating fractions of a revolution shown in the general form pf a disc, which is attached to hub 13 as by screws 20. A crank handle 21 is secured to sleeve 10 by screws 22 and forms together with sleeve 10 and flange 11 constrainingmeans for restricting the axial .movement of gears 14 and 15 and index members 18 and 1.) and the entire unit thus formed is held' on shaft 1 by a washer 23' together with its cooperating nut 2 1 which is locked inposition by a set screw 25. grease cup 26 is. screwed into a counterbore 27 in shaft 1 and supplies lubricant tothe several moving parts through lubricating cooperating in the hubs of the gears as at 28 and 28 in the usual manner.

[mlcm members.

A shell or casing 29, in the general form of a drum, is secured to plate 7 by suitable means such. as screws 30 and forms a partial enclosure for the moving parts. The face of this drum carries index marks forming a 31 which will be referred to as the imst ationary index. Surrounding 31' dial although any suitable number of divisions may be employed.

The index member 18 for complete revolutions carries index marks forming a dial 32 movable or equal in number to the marks on the her 18 adjacent its periphery 3 1 in ring lubricating holes adjacent its peripheral front face. A ring 33 is attached to the rear face of index memand inside teeth or serrations 34 are" formed therein for a purpose tobe hereinafter described. These are equal in number to the division-on dial 32 which are equal in number to the teeth of gear 15 which in thiscase are 100 in number --I11dex plate 19 provided with a series of perforations 35 formed concentric to shaft 1 and equal in number. to the divisions on dial 31 (in this instance 100). Registration means suc as recessesilti and 36 are formed in peripheral portions of index members 18 and 19 at points corresponding to the zero position of dial 31, the function of which will be more fully pointed out hereinafter.

Locking mums and stops.

' A locking lever 37 (Fig. 1) pivoted at 38 to a fixed lug 39 herein shown as a part of drum 29 carries a tongue 40 (see also D recesses 36'3(3 when 111 register, and thereby lock index members 18 and 19 against rotation for purposes to be more fully described later. Fittcd in the recess in the end of locking lever 37 (Fig. 4) is a vanishing stop member 11 normal:ly held in araised position by a spring 42 and adapted to be pressed downward by a push pin Fi s. 2 and 41) adapted to enternotches or A rider 44 is slidably mounted on the periphery of index member 18 and carries a tongue 45 adapted to engage The tongue being normally held locked in one of said serrations on a portion of ring 33 by spring 46 and adapted to be released for adjustment by means 0 push button 4-7. The face of the rider is adapted to abut against the vanishing stop 11 when the latter is in its exposed or operative position for setting the index number 18 for complete renolutions, as described following. f

A rider-4S is slidably mounted on the peripheral flange bearing the dial 31 and carries a tongue 19 adapted to engage one of the serrations 31 on the periphery of the drum 29; the tongue' being normally held locked in one 0 said serrations by spring 5d and adapted to be released for adjustment by means of push button 51. A vani hing stop is slidably litted in rider 18 with a spring 53 normally holding it in an inoperative position. and adapted to be pressed into an operative position by push pin 54. These vanishing stops are employed so that normally i. e. when not in actual 'use, they are retracted and do' not form an obstruction to the relative movement of the parts to which they are respectively attached.

A fixed stop 55 is attached to index niem: ber I9 and adapted to abut against vanishthe serration' for fractions is ing stop when. the letter or exposed position, for sewing member 19 for fractional revolut more fully described later.

Crank handle 21 is provid d one ith e handle 56 and at is opposite end with a plunger pin 5? edf ted normell be pressed into one of the the index member 19 by i however: it is desires to handle from the index member accomplished by lifting up t lcnurl 59 of the pin 57 and turning the in head until pin 60 rests on boss. 61.

Means for locking gear 15 to index men?- ber 18 is accomplished. as "follows: Heterring to Figs. 9, end 3, an annular flange 6'2 projects from the rear 01" index inenibe in such a position that it lies contiguous a serrated. portion 63 formed on gear 15.

suitable locking device such us a lot plunger 64 1s shdably mounted in :1 510' held out of engeger .Il'b with the serrations 63 by a spring (35. one end oi which fixed in flange 62 and the other end of ivl'i ch or ries the plunger 64: and is free to move in slot 65. A plunger actuating member such as com ring 68 is mounted on. fione'e and held in position free to be oscillated within certain limits. by set screws 6? screwed into the flange with their pen tions engaging" slots 68 in cam ring 66. A com surface 69 engages the plunger (5-ithat when the cam ring" is moved counterclockwise, as illustrated by the arrow in Fig. 3, the locking plunger 64 will be pressed into one of the serrations 63 to thereby loci; gear 15 to index member 18. Projections 70 are formed at intervals around the pe riphery of com ring (ifi'nnd provide means for readily catching hold of the cam ris to more the some. One of these projections is therefore always in :1 position to he reedily accessible from the same point, no matter in What position of rotation the plunger 64; is in. since ring" (36 surrounds the shaft- 1. A spring pressed plunger 71 mounted on flange 62 engages recess 72 in com ring 66 to normally hold the corn ring in such position that locking pin 64 will be held in cnugement with one of the serrations and thcrcbv the gear 15 and index member l3 held locked together. However. when the cum ring is rotated couuteucloclmise the plunger 'r'lis forced down comm-(axing the suring and the point of the. plunger rides on the inner side of the cam ring.

A means for locking the sl'is'l't 1 against rotation while the index members are being set is shown in Figs. 6 and 'F. A bolt 2 is mounted to slide radially on plate 7 and. adapted to be moved by a knurled handle 74 slidable in a slot 75' in ploleT. The end of the bolt as at T6 is adapted to engage the serrated periphery 7.1 of flange Setting.

Before describing the actual setting a. brief statement of so ie important facts, and a resume of already stated above will be made.

is has 101 teeth, gear 15 has 1.00 teeth. and the idle 1'? is in mesh with both of. thesev gears: Therefore each time gear 1% makes one revolution gear 15 makes one revolution plus one tooth. Then with traction index member secured to gear 14. it" We loci: index member 10 to gear 15, and connect M to shaft 1 each time shalt 1 makes one revolution index member 1:3 will have gained 1 tooth distance relative to index member 19. Gr stated another way, for each tooth distance gained by the index member 18 relative to index member 19 the Sllz'lli I will have made one revolution. Also, the index member" and 19 when attached respectively to fife-ai s l5 and 14, which are in mesh with idle gear 1?, are connected together through the gears 15, lit and 17 in the ratio of to ifil, "the gears acting as a differential: Hence when the gear 14 together with the index member 19 is rotated a given angular {ll nee 15 and index member 1 distance plus 1-. revoun ion.

Therefore to rotate index member 19 1/10 revolution Setting counting heed.

.ASSllllllllg, an example, that it is clesired to the counting head for 15 and 1/1 revolutions of the shaft 1, which might be a lead screw, 21. jack-screw or a driving or driven shaft, and which for ln'erity will 'le eferred to hereinafter as a shaft. The sin rt is locked bynioving the bolt 7:} into engagement with flange 11 as described above. Then the push pin 47 is pressed in and rider 414: is now moved clockwise (Fig. 1} and sci; on division 15 of dial 132 on index member id, pin 47 is released and tongue 45 (see also Fig. el) engages the correspond the. rider in this position. Lever 37 is swung upward. about its pivot 38 until (on ue 4:0 is out of engagement with recc 3G-36 and rides in the periphery of index described following. Pin on the lever arm 37 is nov pushed clown lowering the vanishing stop 4-1 which is held in this p0sition and index member 18 is rotated counterclockwise until the face of the rider 44 abuts vanishing stop l1. This has moved we a same angular scrrution on ring 33 and. holds uernber 38 and 19 as 18 is rotated as tions and gear 15 has 100 teeth. index member 18 to gear 15 vanishing. stop 18 back of traction index ular distance equal to 15 has 100 Serra Next lock by turning cam "o f Figs. Qand 3). This has set the h nting head for 15 complete revolutions. This looks index members 18 and 19 to gether, through the difi 'er'ential composed of gears 14, 15, and 1 in aratio 0 0 to 101- as hereinbefore described. Next move rider 48 counter-clockwise to division 10 by pushing in pin 51 which releases it and then sliding along'and releasing pin 51 to cause tongue 49' to' engage one of the serrations 31 corresponding to 10 on the dial 31 of the immovable index member 29. Then unlock crank 21 from index member 19by pulling out knurled head 59, thus disengaging pin 5'T..,from the perforation and rotate the knurled head to lock pin 57 in an inoperative position.

Push in pin dial 31, (Figs.

index member member 19 an ang teeth of gear 15, since ring 33 54 on rider 18,- mounted on 2 and 3) thus bringing the and rotate index member 19 counter-clockwise until the-fixed stop 55 abuts against the vanishing stop 52 carried by rider 18. .This last movement has movedindex menr ber 19 an angular distance equalto 10 teeth ar distance equal to 10 teeth plus 1/10 tooth. Therefore index member 18 has been set counter-clockwise with respect to index member 19 a total peripheral distance equal to 15 and 1/10 -'teeth, and hence the registration recesses have been separated this distance.

As explained above the shaft will have to rotate clockwise l5 and 1/10 revolutions before these registration recesses .come into proper register again. Lock crank 21 to index member 19 by means of pin-57 engaging the corresponding: perforation 35, and unlock shaft 1 by pulling out bolt lock 7 3. Shaft 1 is now rendv to be rotated by suitable incans either by motive power represented by motorz or by manual means which may be applied by means of handle 56 on crank 21.

Repeat setting.

The repeat setting of the counting head after an operation has taken place will now be described. First look shaft 1 against rotation as before, by plunger 73,.unlock cam ring 66 thereby releasing index member 18 from its gear 15. Move index member 18 until rider'aa (already set from previous operation) engages vanishing stop Then lock'gca'r 15 and index member 18 by means of cam ring 66; unlock crank handle 21, rotate both dials backwards or counterclockwise until stop 55 abuts vanishing stop 52 on rider 48 which has remained set from the previous operation as before described;

member 19 as 52 into operative positionrelease crank pin to lock crank 21 to index before; unlock shaft 1 by releasing bolt 73 from engagement with flange 11, and the setting has been repeated and the shaft is now ready to be rotated.

Manual operation and autonomic stop.

lVhen manual operation is employed any suitable means may be used. inlhe embodin'ient shown herein'handle 56 on crank 21 is rotated and pin 5! on the opposite end of crank 21 drives index member 13) which. is fastened to hub 13, keyed to shaft 1. gear 14 is an integral part of hub 13 and is in mesh withidler 17 (Fig. 1) which is also in mesh with gear 15, which is locked to index member 18. So that as shaft 1 is rotated index member 18 gains 1 tooth relative to index member 19 at each revolution, and after 15 and 1/10 revolutions have been made by shaft and index member 19, index member 18 has regained the 15 and 1/10 tooth 1'ieripheral distance and. the recesses 36-436 in index members 18 and 15) respectively have come into register, whe-reat tongue 10 on the end of lever 37 drops into rcgistc pu ed down by spring 38') and lockssh v Zqctrio switches.

When motive ope 'atingz means is desired it is advisable to have means for cutting o the motive power so that too great a shock will not occur when the tongue -10 falls into recesses 36-436. It is also preferable to have certain safety cutout. switches and master switches to make the motive means inoperative when the index members are being set for a certain position. hikewise when itis dcsiredto use the motive means without the counting head it is desirable to provide a means to'prevent these cut-out switches from functioning. These various switches ior controlling the motive means will now be described.

Bolt 73is provided with a slotted portion '77 for (ll flll lfill'ittllt with the lever 7 of an electric switch 79 which attached to date so that when the bolt 73 is moved forward to lock the shaft 1 from rotating: the lever 78 is moved forward to operate the switch to close a relay switch to be described and for purposes to he set forth hereinafter,

This switch will be referred to as switch A.

A switch 79 (Fig. 1) lllOlUlittl adjacent the forked end of lever 37 so that when lever 87 is raised and thrown back beyond its normal position the upper forked end of lever 37 will engage the lover TS to close the circuit in. which it. is placed for purposes to be hereinafter described. A spring 2-18 is so positioned that it acts as a log s u 11;; to hold i ii? in cit" f the "positions to which it in i m nose ever when the lever 37 is held in a neutral position by tongue 10 riding upon the periphery of index members 18 and 1! or when tongue 40 in recesses 5l6--3G', lever 78' in a neutral position and switch 79" is opened. This switch will be referred to as switch 13.

Referring to Figs. 1, 2, and 5 (more particularly F 1) a support is secured to index membe:- 13 and pivotally mounted thereon and springpressed outwardly by spring; 81 a roller 82 pivoted on a radially extending axis 83 so that the roller 8'2 describes'a concentric path on the face of iud'ex member 18 during the relative movement of index members 18 and 19. A slot with bevcled ends is cut through index member 18 in the path of roller 82 and sntliciently wide to permit roller 82 to pass therethrough and contact with a plate 85 iarried b an insulated base 86 attached to a non-rotatable part of the counting head such as plate Roller 82 and slot 84: are so positioned on index members 18 and 19 relative to each other that they coincide at a certain peiiphcral tooth distance ahead of that point, at which recesses ERG-36 comeinto register. ()r in other words roller contacts plate 85 a certain number of revolutions (in this instance two) ahead of the time when cc s 36 36, come into register. Now if this roller 82 "and plate 85 be placed in a circuit: by connecting'one side of tl1ecircuit to roller 82 throne-fl] index member 1.) and a part of its supporting structure. and plate to the other side of the circuit, then at a time revolutions before recesses I-l(3-3(3' of index members l and TH) respectivel come into register this circuit will be closed to operate a relay switch to be described, to cut out the motor as set forth hereinafter. This switch will he rci'err'wl to as switch C.

Notice oi'lc'rafz on.

In the embodiment shown an electric motor 2 is shown. So the motive means will be described in connection with thisembodiment, it being understood that any other suitable motive means may be employed. Likewise where the relay switches above referred to, and to bedescribed hereinafter, are shown as operating to break the electric circuit "furnishing power to the motor 2-, they may also bcadaptedto cut; out or make inoperative any other motive means which it may be found desirable toemploy, all of which will be well understood by those skilled in the art, after fully understanding this embodiment of my invention.

Referring to Fig. 8 wherein the various parts are diagrammatically represented, the motor is shown at p for supplying electrical energy to the motor breaker 'will operate to keep the concerned.

. 3, the power circuit.

represcnttml as vi a d represents a circuit breaker s itch Jo positively operated to start or stop the motor and of the type well known in the art where an interruption of electrical energy in circuit ST will throw out 3' ch 88 to break the circuit until switch in is again thrown in and the ci cuit 8? otherwise closed. Relay switches 85). S9 and 259 are inteiposed in the circuit and are supplied with electr Jul energy by any suitable source such as a storage battery ill), of low voltage (about 10 volts being used). The relay switch 89 is in parallel to or shunted around swieh S9.

'ihese relays are auged with means to normally hold the rcuit. open. such as sprin s 91. i l and 91 and the relays are magnetized to oppose this action and thereby hold the circuit closed in so tar as their operation is concerned. It will therefore be seen that even with the switch 88 closed, if the electrical energy of either of the relay circuits St), or 39 is out. oii the cult Hcnit open and the electrical ener y cut. oil" there by cutting oil, or (ping shut oil', the motor :2 until switch is positively closed again. It hon .fti therelay circuit 89' is closed the relay circuit H9 is therebymade inefh-ctive and while switches A and R are closed the switch 88 will be the operating switch.

Switclms it,

and above referred to are inserted in t i espective circuits of relays 89, i) and it will therefore be understood that 1] either oi the switches A or (I are operated as above described to out off the elec ri, ene y from their respective circuits ihe as ned spring will open the correspondlog niay switch and either (EH59 the motor to be cut otl" or else prevent its being turned ongas the case may be; with this exception, that if switch B is operated to close relay 89' the switch C will be inetlcctive to cut out the motor 2.

Now il" reterrin; r to Figs. 1, 6, and 8,

as theho s moved lorward to lock the shaft. 1 age must rotation the switch A breaks the circuit of the corresponding relay 8%) However as the counting head is set and during which procedure lever 37 is raised to neutral position, and swi i closed as belt, 73 is withdmwn the circuit is now closed in tar as the "relay switches are At; this time switch C is inoper ive with roller 89 riding on the face of member 18. New switch 87 is closed. the motor cuts in and the shaft 1 is rotated. Assuming the some setting described hove namely for 15 1/10 revohn shaft 1 has rotated '13 vl/lO 82 comes opposite slot tions, an 1 revolutions the re 2151' i motor circuit 8 st and is pressed against plate by spring 81' thereby closing the contact across the circuit to relay 89 and short-circuiting an causing the magnet of the same to become ino erative and hence open the circuit 87 an out out the motor. Then the handle 56 on the crank 21 is turned manually the remaining revolutions to bring

recesses

36 and 36 into register. The slot 84: is sufiiciently long for the relative movement 0 the roller 82 to take place in the 'slot so as not to bring the roller on the face of index member 19. Therefore at the-completion of the two final revolutions the contact is again made and this prevents the 87 from being closed until a new setting of the index members has been made, thereby breaking the contact between roller 82 and plate 85. Tongue 40 now falls into recesses 36-36 and the shaft is locked against further rotation.

To Ynake it possible to operate independently of the counting head motor 2 a shunt switch is embodied in switch B which functions as follows. By picking up lever 87 and moving it clockwise to its farthest osition switch B is closed thereby shunting around switch 89" and by closing switch 88 the circuit 87 will be closed so that even if switch C is operated by the dial, and the relay 89 thereby opened, the motor circuit 87 will remain closed through the 'shunt circuit completed by the closing '0 relay 89.

The control of circuit 89 made by switch C may be accomplished in several ways, of which switch C is the preferred form. Two other meansof operating this circuit both of w hich I with my counting heads are 9 and 10.

Referring to Fig. 9, segments of index members 18 and 19 are diagrammatically represented and the notches or recesses 36-.36" are shown approaching alignment. Three more reyolutions will-bring them into register. At the position shown, howevcr, 'the notches 92 and 93 come into register and allow the bar 94: to drop down carrying therewith the contact to open relay circuit 89 and thereby open circuit 87 (Fig. 8). Instead of 'the notches '9293 however insulated blocks 92-93 (Fig. 10) may be inserted in the index members placed in the. circuit; bar 8 acting as the electrical connection,

As the insulated blocks come into register the circuit is broken and relay circuit 8.9, opened and the motive meanscut off as hereinbefore described.

Having thus described my invention with articularity with reference to the preferred embodiment of the same and having referred to some of the modifications thereof, it will be obvious to those skilled in the art, after shown in Figs.

. the appended index member have employed in connectioncounted, a pair understanding my invention, that other changes and modifications may be made therein without departing from the spirit and scope of my inventiomand I aimgin. claims to cover such changes and modifications as are within the scope of my invention.

What I claim is:

1. In a counting head, the combination of a shaft the rotations of which are to be counted, a pair of differential gears geare together, a first index member for indicating fractional revolutions connected to one of said d fferential with to rotate relative gears and adapted thereto the shaft, a sccon index member for indicating complete revoliitions freeto rotate with respect to'said shaft and the other of and means for selectively locking said second .index member to the other difierential gear,

- whereby with said first index member conand when said second in;- gear, and said nected to its gear dex member is locked to its second index member is rotated, the two index members are caused to be moved angu larly one with respect to fractional setting of the index members.

2; In a counting hea-d,

said differential gears,

the other for the the combination of a shaft the rotations of which are to be counted, a pair of differential gearsgeared t0g6tli01','fl first index member for indicating fractional revolutions connected to one of said differential gears and adapted therewith to rotate relative to the shaft, a second for indicating complete revolutions free to rotate with respect to said shaft and the other of gears, means for selectively on'd index member to the other differential gear, whereby with said first index member conne ctedto its gear and when said second index member is locked to its gear, and said second index member is rotated, the two iiidex members are caused to. be moved angularlyone with respect to the other for the fractional setting of 'the index members,

locking means adapted ing portions on the two index members to stop the rotation of the shaft whenthrough the'rotation of ;the shaft broughtmto alignment. 3. In a counting head, the combination of said portions are said differential locking said secto engage registera shaft the rotations of which are to be together, a first index member for indicat 'ing fractional revolutions connected to one of said differential gears and adapted tliQ/LU' with to rotatei'elative to theshaft, a second index member for indicating complete revo lut'ions free to rotate with respect to said shaft and the other of said difierential gears, means for selectively locking said secon differential gears geared uuiOZlS rotation when through roiaiion pl'mbions ought info i. In. a conntiinz'heari, the combination of i a shaft the rotations of Wl ieii are to counted, a pair of (iiii'erential gears gear" together, a lit' r index moro erior indicating fractional revoiuiions 1 0 one "ed lhei'ewiih ..i.., a second in deX member -or in ri completo rovolntions, means for ionizing said second index member to the other differential gear, Whereby with said first index member conneoi'oi to its grar and when said second index mom-- be? is locked to its gear and said second index member is rotaterh the two index members are caused to he moved singularly one with respect to the other for ihe fractional selling of the index members, means connecting one of said index members to rho shaft whereby when the sl is rotaied said index members are driven, motive means for driving said shaft, locking means adapted to engage registering portions on the two index members, when through ihe relation of tho shaftsziid portions nro brought inlo ali 'umeni, to stop the rotation of the shaft and means for u'ron'mtiraliy rendering; the motive iiioans inoil'rciive for driving the shaft a predeiern'iined inlei'val before the; index locking means heroines ofi'oclive.

5. In a rounting" hood, 'lho comhinnlion of a shaft to be rotated, a first index member and a second index member, said nirmhers having (llVlSlOI'iS adopted respectively to indicate fractional and complete revolutions of said shaft, means forqrelatively setting said index members to govern the complete revolutions, differential means including a gear associated with each of said index members for relatively setting said index; niembers to govern the fractional revoln iions before said shaft is rotated, and means for'rotating said shall the fractional and complete revolutions after said index memiJPIS have been set for governing: fractional and romplrlo revolutions.

6. lna rouni'ingg head, the rombinuliou of a shaft to be Pointed, an in'lev momlior a gear associated therewith, and menus for l and gear ton elher him]: and an no in lin al said n poriion of *v 3 701" pro" an-i: said said gear, on z-iimz-itii'ig inn so -l plunger gonzwli92"(i ind-ox 2; gear may bo lorhod iogei'her noi'n'mlly friciionnliy holdin Rani inrnihr-r in ope: i position in ionic index mombor and said goiniogriiu-r.

10. in zoi movable and iixoo index members. a. shaft lo be rotated and means for seiiin sold index lliOllii rs rolniivci'o curb other wowgovornino' the roljnlion of said slm'i'i, said moans including" iixo'l and movable siops or i inn filo I'i iHiiYii movemvnfsoi said indox lilthllj il'rf said sin oing :uluplud for on- ;mgouwnt \vii'h mh other for sorting said ind nui-mbors 1i? free to pass uivh other ii. d

oi a to be volialerii first index member and a second iox'dox member, said membors having divisions adapted respectively to indirate fracsional and complei'e .revol u tions of said shaft, means for relatively setting said index members to govern the com piste revoluiions, differential means im'luda gear associated Wi'sh eaoh of aid index members for relatively setting said index members to govern the fractional revolutions before said shaft is rotated, motive menus for rotating said shaft the fravtional and all but a predetermined number of tho Pom plele revoluiions after said index members have been set for governing fractional and complete revolutions, and manual means for finishing, the final complete revolutions.

12. In a counting head, the oombinaizion' a nd said 95 rou tin head, the combination imiiruotod (luring iho roimion of said complete rotative movement of a shaft tobe rotated, a first index member and. a second index member, said mem bers having divisions adapted respectively to indicate fractional and complete revolus tionsof said shaft, means for relatively setting saidindex members to govern the comnlete revolutions, differential means includ mg, a gear-associated with each of said index members for relatively setting: said in dex'i-nemla-rs to governthe fractional revolutions before said shaft is rotated, motive means for rotating said shaft a partof the desired after said index members have been set for governing fractional. and vcomplete revolutions, and manual means for completing the final rotative movement desired.

ii"). in counting head, the combination of a shaft to be. rotated, a first index member and a second index member, said members having divisions adapted respectively to iniiicate fract ional and complete revolutions of said shaft means for relatively setting said. index mei'ubers to govern the complete revolutions, differential means including agear associated with each of said index members for relatively setting said index members to govern the fractional revolutionsbefore said shaftis rotated, motive means to rotate said shaft, cut out means cooperating with said motive means to cut out said motive means be fore the total rotative movement allowed by the setting; of said index members has been emupleted, and means to mannall complete said total rotative movement.

ii. In a counting head, the combination of a shaft to be rotated, a first index member and a second index member, said members having; divisions adapted respectively to indicale. fractional andcomplete revolutions of said shalt, means for relatively setting said index members to govern the complete revolutions, differential means including a scar associated with each of said index members for relatively setting}; said index memborn to govern the fractional revolutions before said shaft is rotated, motive meansfto rotate said shaft, ciit'out'means cooperating with said motive means to cutout said m0- tive means before the total rotative movement allowed by the setting membershas been completed, cut out means to cause said means to become inetfecth c,

15. In an index device, a substantially drum shaped fixed member, carrying index marks on its face, a rider movable along said index marks, a vanishing stop on said rider, a shaft mounted for rotation in said member, a sleeve on said shaft rotatively connected therewith, meansfor locking'said shaftag: inst rotation, a crank connected to said shaft for rotating said shaft, a first spur gear mounted on said sleeve free to rotate thereon, a (liaise-cured to the hub of said spur gear, a stop on said dial, a second gear mounted on the hub of saidspur gear free to rotate thereon, a second dial mounted on the hub of said second spur gear..f.-'ee to ro tate thereon, means for locking sai second gear to said second dial, a rider on said second dial. a vanishing stop on said rider, a catch pivotally mounted on said drum shaped member. a vanishing stop on said catch. and an idle spur gear in mesh with said first and second spur gears.

16. In an index device, drum shaped fixed member, a shaft mounted for rotation in said member, a sleeve on sai shaft rotat i rely connected therewith, a crank connected to said shaft for rotating sai shaft, alirst spur gear mounted on said sleeve free to rotate theieon, a dial secured to hub of saidspur gear, on thehub of said spur gear free to rotate thereon, a second dial mounted on the hub of said second spur gear free to rotate thereand auxiliary first out out on, means for locking said secondgear to said second dial. and an idle spur gear in mesh with said first and second spur gears.

In testimony whereof I have signed my name to this specification.

HARRY 0. Jones. I

a substantially of said index the a second gear mounted