US2116565A

US2116565A - Metalworking machine

Info

Publication number: US2116565A
Application number: US97157A
Authority: US
Inventors: Alfred E Drissner
Original assignee: National Acme Co
Current assignee: Devlieg Bullard Inc
Priority date: 1936-08-21
Filing date: 1936-08-21
Publication date: 1938-05-10
Anticipated expiration: 1955-05-10

Description

Y May 1o, 1938. f

' A. E. DRlsSNER METALWORKING MACHINE `med Aug. 21, 195e 11 shets-sheet 1 A. El DRlssNER METALWQRKING MACHINE May 10, 1938.

Filed Aug. 21, 1936 11 Sheets-Sheet 2 Ill/Isl f /f Il ,fr n c L. lHlllllnL- May 10, 1938- A. DRlssNER 2,116,565

METALWORKING MACHINE BY A ATTORNEE May 10, 1938. A, E. DRlssNER '2,116,565

i METALWORKING MACHINE V y Filed Aug. 21', 195e usheefs-sheet 4 INVENTOR ATTORNEY May l0, 1938.` l A. E. DRlssNER 2,115,565

METALWORKING MACHINE i Filed Aug. 2l, 1936 1l Sheets-Sheet 5 May l0, 1938. A. E. DRlssNER METALWORKING MACHINE Filed A'ug. 21, 1956 l1 Sheets-Sheet 6 ATTORNEY A. E. DRSSNER METALWORKING lvmcHINEJ May 10, 1938.

Filed Aug. 21, 1936v 11 Sheets-Sheel 8 INVENTOR IIII|IIIIIIIIIIII|||I||IH 47A Ilz...

May l0, 1938. A. E. DRlssNl-:R

METALWORKING MACHINE Filed Aug. 2l, 1936 11 Sheets-Sheet 9 LA. BY CTI- Ij- I ATTORNEY May l0, 1938. A. E. DRlssNER METALWORKING MACHINE Filed Aug. 21, 1956 l1 Sheets-SheetvlO INVENTOR May 10, 1938. A. E. DRlss'NER 2,116,565

l METALWORKING MACHINE l Filed Aug. 2l, 1956 11 Sheets-Sheet 1l INVENTOR ATTORNEY Patented May 10, 1938 UNITED STATES PATENT OFFECE METALWORKING MACHINE a corporation of Ohio Application August 21, 1936, Serial No. 97,157

45 Claims.

This invention relates to metal working machines and particularly tothat type commonly designated as automatic multiple spindle screw machines, the invention being illustrated as a five spindle bar machine.

An object of the invention is the provision of a low open top easily accessible, simplified and low cost machine of this class particularly adapted for short work such as the manufacture of ,bearing cones and cups although useful for the manufacture of bevel gears and other work.

A further object of the invention is the provision of an improved machine in which the driving mechanism including the motor change gear `box for changing the spindle speed and feed gears is located behind the spindle carrier housing and under the chucking and feeding mechanism instead of being located as heretofore in a casing or housing spaced some distance from the work spindle carrier housing or casing whereby the machine is more compact, very much simplified l in its construction and a materially less number of parts is required and at the same time a low open top and very much shorter machine is pro- Avided readily accessible for tooling and other operations.

Some of the important advantages of this improved machine are the accessibility of the tools and the open space below the main tool slide whereby all of the chips can be removed from one end of the machine without interfering with its operation. Also, the forming slides provided for the spindles are controlled independently and easily accessible with the speed and feed controlling unit entirely independent from the main spindle carrier housing and cam drum housing.

A still further object of the invention is the provision of an improved electrical indexing mechanism effective to index the work spindle carrier although it can also be used to index the tool carrier or turret of a single spindle machine.

Notwithstanding the low type of machine shown, the spindle carrier is of large diameter and in a five spindle machine such as shown, it is 38 in diameter although the diameter will vary according to the size, capacity and number of spindles used on the machine since the machine is well adapted for four, five, six or more spindles.

Obviously, with this enormously large spindle carrier, it would be very complicated and practically impossible to control the spindle carrier for indexing and locking by means of a Geneva movement or a fan gear indexing movement as previously used on other types of machines.

When indexing with a Geneva movement, the indexing arm has to cc-ntact with roller guides on the spindle carrier or must be indexed by means of a gear such as shown in the prior patent to ,Simpson et al., No. 2,033,490, of March 10th,

1936, assigned tothe National Acme Company, the assignee of the present improvement. Such an indexing mechanism, however, would enlarge the machine and exert considerable strain on` the indexing mechanism. Therefore, as stated, one of the objects of the invention is the provision of a very simple type of indexing mechanism overcoming the diiculties specified and which will index this enormous weight in the shortest time with the least complicated mechanism and strain and while it is particularly adapted for use with a machine of the type specified, it can also be used on smaller types of machines having a varying number of spindles without any change in the mechanism,` thereby doing away with the use of index arms, Geneva movements and gear movements heretofore used. Thus, this improved electrical driving means eliminates not only the Geneva type of indexing and the use of all intermediate gearing but also driving clutches and friction drives all having certain well known disadvantages and, by reason of the fact that the motor shaft worm is directly driven by the motor and directly engages the peripheral gear of the indexible carrier, it forms a direct and powerful drive having high eiciency and effectiveness for indexing the carrier at speed and reducing to a minimum lost motion, wear of numerous intermediate parts and friction of such parts all present in prior types of indexing.

A still further object of the invention is the provision of an electrical indexing mechanism controlled by the locking bolt of the spindle carrier and having certain improved features hereinafter referred to.

In the drawings accompanying and forming a part of this specification, Fig. 1 is a side view of this improved machine.

Fig. 2 is a right hand end view of Fig. 1.

Fig. 3 is a transverse vertical sectional view taken on the line 3--3 of Fig. 1.

Fig. 4 is a transverse vertical sectional view taken on the line 4-4 of Fig. 1 and illustrates the electrical indexing mechanism. This gure illustrates a modification of the indexing mechanism in that a single centrally located cam shaft is used.

Fig. 5 is an enlarged partly sectional View of the electrical indexing mechanism.

Fig. 6 is a detail View of the locking bolt mechanism.

Fig. 7 is a side view looking toward the right in Fig. 6.

Fig. 8 is a partly sectional view of the duplicate cam shaft mechanism.

Fig. 9 is a partly sectional view illustrating the hand crank controlled portion of the machine and the switch mechanism controlled thereby when a single cam shaft such as illustrated in Fig. 4 is used.

Fig. 10 is a View of Fig. 9 looking toward the right.

Fig. 11 is an expanded plan view partly in section of the gear box mechanism operated from the main driving motor and within this gear box is housed the spindle change gears and the feed change gears; and

Fig. l2 is a transverse vertical section on the line l2-l2 of Fig. 8.

Similar characters of reference indicate corresponding parts in the several views.

Before explaining in detail the present improvement and mode of operation thereof, I desire to have it understood that the invention is not limited to the details of construction and arrangement of parts illustrated in the accompanying drawings since the invention is capable of other embodiments, and that the phraseology employed is for the purpose of description and not of limitation.

Framework The framework of the machine comprises a pan-formed bed Z having one upright 3 midway of its length to house the spindle carrier and to the top of this upright is secured a top bracket 4 extending rearwardly and connected to the reel disk support 5 for the bar stock.

Spaced from this centrally located upright 3 is another upright 5 of materially less height and forming a cam druIn housing. It was in this cam drum housing when constructed materially larger in al1 dimensions and spaced farther away from the spindle carrier housing that the driving mechanism including the gear box was heretofore located but which, however, in the present improved machine, is located behind the spindle carrier housing underneath the chucking and feeding mechanism and so eliminating all of this mechanism from the cam drum housing.

Thus, this machine is made much shorter and much lower and materially simplified while giving free access to the chips and permitting them to drop freely into the open front space of the pan between the two housings so that they can be removed from the pan without interfering with the operation of the machine through the halfmoon shaped opening I in the cam drum housing.

To facilitate the removal of the chips from this pan, a chip chute may be provided which can be turned to line up with the angle in the pan and this chute may be utilized as a guard over the half-moon shaped opening in the cam drum housing.

In this machine, substantially all of the movable parts are mounted within the housings with the exception of the main tool slide ll. The single driving shaft 2l) and the two

cam shafts

35 and 35 hereinafter referred to and located on opposite sides of the machine are also housed between the spindle carrier housing 3 and the cam l drum housing 6 by side brackets 39 and 4l) and these brackets connect the two

housings

3 and 6 and are bolted to the chip pan sol that both units are of rigid construction.

Spindle carrier mechanism, collets and feed tubes and are well known in multiple spindle machines.

Into this spindle carrier 8 a spindle carrier extenson, stem or shaft Il) is pressed, it extending the full length of the spindle carrier and is fastened thereto by dowel pins. 'I'his extension or shaft extends from the spindle carrier toward and into the cam drum housing or upright 8, being supported therein in a suitable manner. Thus, the rotary spindle carrier has a threepoint bearing, namely, the twol disks and the opposite end of the stem or shaft in the drum housing.

This rotary spindle carrier is controlled endwise by a suitable thrust washer in front of the cam drum housing and a nut on the inside of this cam drum housing thus holding the spindle carrier and its stem or shaft rigidly both radially and otherwise.

Main tool slide :Mounted on ths stem or shaft I0 is the main tool slide I l, it being guided by an upwardly projecting arm l2 sliding on a short guide bracket I3 secured to and projecting beyond the inner face of the cam drum housing and this assists in maintaining the tool slide in line with the work spindles. It will thus be observed that the spindle carrier housing or upright 3 and drum housing 6 are unconnected by a bar or beam heretoffore considered necessary, thus leaving the machine entirely open at its top and so affording greater accessibility thereto.

This tool slide is shifted back and forth by a rod I4 secured to the tool slide and having a side arm l5 (see Figs. 2 and 3) carrying a cam roll in Contact with a tool slide cam drum I6 suitably supported and geared to the cam shaft 35 hereinafter referred to, this cam drum being located in the cam drum housing 6.

The shaft i4 and therefore the main tool slide is also guided by a depending arm I4' having a forked end sliding on a short shaft M, all located within the cam drum housing.

Accelerated tool spindles In this cam drum housing there is also located a cam drum Il carrying a plurality of cams for controlling two additional tool spindles lla and Ilb designed for the purpose of accelerated boring, turning, reaming, etc., and which work independently of the main tool slide ll but are supported by a tool holder mounted on the tool slide.

This construction is such that if the main tool slide should travel, say, one inch to split up the drilling, rough boring or turning, the accelerated tool spindles controlled by this cam drum l1 can travel two or three times this distance to finish the piece. The cam drum ll has its shaft suitably gear connected With the cam shaft 36 by a train of gears llc and is driven thereby.

Driving mechanism This improved machine is driven by a suitable motor I8 coupled with a gear box driving mechanism I 9 (see Fig. l1) and this gear box houses the spindle change gears and feed change gears and is located below and at the rear end of the rotary work spindles to eliminate overhang or extremely high construction of the machine.

From this gear box the driving shaft 20 runs the full length of the machine and into the cam drum housing 6 and has within the cam drum housing, a driving chain 2|. This chain drive has a variable speed controlled by. the gear box varying from 288 to 1500 R. P. M. and is controlled by the spindle change gears. The chain drives an intermediate: gear 22 meshing with a gear Z55 located on one end of the spindle driv` ing shaft 2G extending through the spindle carrier stem` or shaft and centrally through the rotary spindle carrier. At its opposite end it carries a gear 25 meshing with gears Z6 carried by the rotary work spindles 9 which may vary in number from four to six or more depending upon the class of Work to be operated upon.

Stock' stop The machine is providedwth a suitable stock stop shown as an oscillating stop 28 (see Figs. l and 2) having an arm 28" operated from a suitable cam on the cam shaft 35.

Feeding mechanism The feeding mechanism, by which is meant the mechanism that-controls the main tool slide cam drum I8, the accelerated toolsl cam drumll, the forming tools slide cam disks hereinafter `referred to, the chuck opening cam drum and stock feed cam drum, controlling the movements ofthe forming tool slides, main tool slide il, stock stop 23. etc., in other Words, all of the cams which have to work simultaneously, is controlled from a gear box through a transverse or cross worm shaft 21 (see Fig. 8i). This worm shaft 2ll carries a pair of worms 3l and 32 respectively meshing with Worm Wheel gears 33 and 35 mounted on

cam shafts

35 and 36 carrying the 'cam drums 31 and 35 and their cams. This worm shaft 2l thus controls the movement of these two cam shafts and the cam drums mounted thereon which are located under the spindle carrier. These cam shafts extend into the cam drum housing t on both sides `thereof and the construction allows the spindle carrier toI be located as low as possible. The worm shaft is rotated by Worm gear mechanism 39 driven by a splined shaft which is a continuation of the feed drive shaft 'll (see Fig. 11).

This Worm shaft has a clutch 'i2 operated by a crank handle as is usual on automatic machines of this type to enable the operator to control by hand all the tool slides through the medium. of the cam shaft and Worm `for setting his tools.

Side and top slides At each side of the machine there are two supcrposed side or cross forming slides 4i and i2 and each pair is operated from cam disks 43 and M carried on the cam shafts 35 and' 36 by means of a system of rack-segment formed levers IE5 and t6. The side forming slides are of vertical shape to eliminate overhang and are easily accessible for the tools.

The top slide lll which is an additional or auxiliary slide and can be used for forming, cutting off, shaving, knurling, etc., is operated by a cam disk 48 by means of a chain drive 49 from the cam shaft 36.

From the foregoing it will be seen that the gear box mechanism, instead of being located as heretofore in the cam drum housing is located in the rear of the spindle carrier below the plane of the rotary spindles and at this end of the machine, thus enabling the machine to be very much shortened and lowered, in other words, more compact notwithstanding the very large size of the spindle carrier which, in the machine shown, carries rotary spindles capable of handling 5"' bar stock and which, in the ordinary typeof machine, `would mean a machine of enormous size'.

Electrical indexing mechanism for the spindle carrier `As before stated', it would bey very complicated and. almost impossible to index and lock such an enormous spindle carrier by a Geneva movementor a fan gear index movement such as commonly used. When' indexing with the Geneva movement, the indexing arm has to contact roller guides on the spindle carrier or must be indexed by means of a gear, all of which would enlarge the machine and put a considerable strain on the indexing mechanism.

In the present improvement, this is all eliminated by a very small type of indexing mechanism which is` effective to directly index the enormous weight of the spindle carrier in the shortest time with the least strain and least complicated mechanism, this being accomplished by means of an electrical' indexing mechanism comprising generally a Worm gear carried by the spindle carrier, a worm in mesh therewith and carried by a worm shaft mounted in suitable bearings, a spring on the shaft and an electric motor, the worm shaft being shown as a part of the motor shaft and this electrical mechanism is controlled by a switch which in turn is controlled by the lock bolt for locking the spindle carrier after each indexing thereof.

Spindle carrier locking mechanism The spring pressed lock bolt 50 (see Figs. 6 and 7) is suitably mounted to engage recesses or seats 5I in the side of the rotary spindle carrier 8 and is controlled from the cam shaft 36r by means of a cam 52 (see. Figs. 4 and '7) shaped to disengage the lockbolt from its seat. At this time, however, the' spindleV carrier is still held in position by mea-ns of the wormgear indexing means. As soon as the lock bolt leaves its bolt seat with very little clearance, it contacts a switch 53` by means of a lever 54 which, in turn, starts the indexing motor` 55 (see Figs. 4 and. 5). This motor rotates the indexing worm shaft 55 in mesh with the Worm gear 56 carried by the rotary spindle carrier 8,. thus starting theY rotary or indexing movement of the rotary spindle carrier 8. As soon as this spindle carrier starts its rotating movement, the lock bolt lifting cam' 52 on the cam shaft 36 Vallows the spring pressed lock bolt to contact with the outside periphery of the spindle carrier and sofmaintains electrical contact until the next lockr bolt seat comes in line with the lock boltwhereupon the lock bolt enters the tapered portion of the lock bolt-seat.

As soon as the lock bolt partly enters its seat, it disengages the switch 53A which shuts olf the current to the motor and: by means of the motor governor or motorcontrol 51', the'motor 55 is stopped within one-half a turn so that the lock bolt can enter its bolt seat at the proper place without danger of overrunnin'g, thus allowing the lock bolt to be seated securely in its seat through the medium of its spring 58 which is a Very heavy spring.

On the worm shaft is also a very heavy spring 59 to cushion the Worm so that there is no strain on the Worm gear if the spindle carrier should have to move slightly backward or forward to allow the loci: bolt to properly seat.

The Worm shaft of this indexing mechanism, as before stated, is shown integral with the motor shaft and extends through the spindle carrier housing for the reception of a crank handle '60 (see Fig. 5) which may be used in the event the operator desires to turn the spindle carrier by hand.

To prevent the spindle carrier from being turned while the current is on, a switch 6I which controls the electrical current is provided and this switch is controlled by a cover plate 62.

AWhen this cover is on, the spring plunger 63 of the switch closes the contact points of the switch and permits the proper operation of the indexing mechanism. When the cover plate 62 is removed to permit the crank handle 66 to be ap- 'plied and med, the spring plunger 63 opens the contact points and breaks the electrical circuit, thus preventing electrical operation of the indexing mechanism.

To insure that this motor controlled electrical :indexing mechanism and bolt controlled switch 53 will be properly timed and not get out of such timing, which might happen in the event the spindle carrier just starts to rotate and the operator should throw out the feed clutch control- 'ling the cam shaft 36 and thus turn the lifting cam for the lock bolt and as there is also the possibility that the lifting cam for the lock bolt may stop at the high point when the clutch controlling the shaft 36 is disengaged, a safety mechanism is provided (see Figs. 9 and 10). The rod connected handle levers '64 on both sides of the machine control the entire feeding movements of the cam shaft when the clutch 65 controlling this feed cam shaft is disengaged by the handle levers E@ and at this time the entire movement of the cam shaft is stopped. At this time, also, a switch 56 controlled by a collar 6l connected with one of the handle levers 64 operates to cut off the current yfrom the indexing mechanism.

Thus, by operating either of the handle levers 64, the entire indexing and feeding mechanism is instantly stopped, one of these handle levers being located, as before stated, at each side of the machine. This switch 66, of course, only controls the current for the indexing mechanism and does not control the main driving motor I8 from which the rotary spindles are driven.

The connected hand levers 68 at opposite sides of the machine are only used for hand control of the high and low speed movement of the cam shaft which controls the cutting time and idle time of the machine.

The machine is provided with suitable clutch and brake mechanism 69 and 10 shown located on the feed drive shaft 'H (see Fig. l1)

There are, of course, other associated and cooperating features in a machine of this kind not deemed necessary to describe herein in detail except to say the shaft designated the feed drive shaft 'H (Fig. 11) includes a clutch shaft coupled thereto by the coupling H and carries clutches '69 and lil. The clutch 7i) is driven by a gear L as the shaft carrying the gear M is, in the assembled machine, located over the shaft ll, thereby shortening the gear box and having all of the gears and driving mechanism in a short compact unit.

The gear M is driven directly from the motor by means of a chain sprocket mechanism N. When clutch 'e'll is engaged, the transverse worm shaft 2 (Fig. 8) Will be rotated at high speed for returning the too-l slide and controlling the inflexing mechanism for the spindle carrier, at the same time advancing the stock feed tube to bring the material to the stock stop.

When the clutch sleeve O controlling clutches 59 and l0 is shifted by means of suitable cams in the machine toward the clutch brake 69, this brake slows down the Worm shaft speed from high to low until the roller clutch P engages clutch shaft 'H for a positive slow feed drive. In other words, the clutch 'l0 is a high speed clutch and clutch 69 is a combination of brake and clutch for quick high and slow operating means connected directly to the slow speed gear by means of the roller clutch P.

The drive shaft Q through the coupling R drives a shaft 20 controlling the Work spindle speeds by means of a, chain 2l, gears 22 and 23 through the center drive shaft 24 (see Figs. 3 and l) which shaft 24, as before stated, goes through the spindle carrier stem. This shaft Q is provided with change gears Y to change the spindle speeds of the Work spindles. The shaft Z controls the feed mechanism through change gears A.

The driving shaft 20 is driven from the shaft O, Fig. l1, through the coupling R and is controlled through the change gears A and Y. A indicates the change gears for the feeding mechanism to drive the feed drive shaft H and Y indicates the change gears for the spindle drive shaft 20. Thus, the shaftl 2B is connected through R with Q as one unit to the gear box of Fig. ll.

The shaft il of Fig. l1 has two clutches for high and low speed which control the worm shaft 35 engaging the worm and clutch 'l2 and shaft 2'! (see Fig. 8). The shaft 21 controls the two

cam shafts

35 and 3%. This shaft 21 can be engaged and disengaged through the clutch 12 and this clutch controls the stopping and starting of the entire feeding mechanism. Both shafts 35 and 3E are always connected together so that the cams located on both shafts are timed correctly.

Thus, the entire construction to control the stopping and starting of the feeding mechanism is controlled by the clutch 'l2 and the high and low speed shaft 38 which is coupled with the shaft 'il is controlled'for high and low speeds by the clutches @i9 and lli.

Q, R and 20 is one unit to drive the work spindles and is independent of the shaft 7H which, with H and 39, form a second unit to control the feeding mechanism.

By indexing the spindle carrier electrically, this makes it possible to build a large type multiple spindle machine very low to the ground all operating parts of which, including those at the top of the machine are easily accessible to and within the reach of the operator.

From the foregoing, it will be seen that when the indexing mechanism is stopped, this does not stop the main motor controlling the rotation of the spindles in the Work spindle carrier. These continue to rotate.

All of the units of this machine with the exception of the motors are flooded in oil by means of a splash oil system and the cutting oil or lubricant for cooling the tools is controlled by a cutting oil pump conveniently located in the pan, and underneath the work chucking and feeding mechanism is provided a space for Water cooling the oil. The cam operated drums enclosed in the cam drum housing are also lubricated by means of an oil splash system.

ln conclusion, it will be observed that the machine, although capable of handling very large bar stock and, therefore, having a massive and consequently heavy rotary spindle carrier, this carrier is Very easily indexed in an expeditious and rapid manner without the use of the complicated mechanism heretofore used in multiple spindle machines and that, furthermore, by the location of a large part of the mechanism heretofore mounted within the cam drum housing at the opposite end of the machine in the rear of the spindle carrier and under the chucking and feeding mechanism for the spindles, a very low machine `and a very short machine is provided, the lessened height of the machine enabling the operator easily to reach all of the tools, thus facilitating the tooling of the machine while the accessibility at all times is increased, especially as the machine is open at the top, having no connecting bar or beam between the two housings, one of which, as before stated, is located centrally of the length of the bed instead of, as heretofore, one at each end of the bed of the machine, thus enabling the stock reel carrying the stock bars to be efficiently supported by a beam connecting the stock reel support and the tool carrier housing and so materially shortening the space necessary for the mounting of the machine in the shop.

It is to be understood that,` by describing in detail herein any particular form, structure or arrangement, it is not intended to limit the invention beyond the terms of the several claims or the requirements of the prior art.

Having thus explained the nature of my said invention and described a Way of constructing and using the same, although Without attempting to set forth all of the forms in which it may be made orall of the modes of its use, I claim:

1. In a machine of the class described, the combination of apair of upright housings spaced apart and forming an open top type machine, an indexable work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, an axially supported reciprocating tool slide located between said housings, chucking and feeding mechanisms for the rotary Work spindles, and actuating means including a change speed gear box located behind the spindle carrier housing and underneath the chucking and feeding mechanisms.

2. In sa machine of the class described, the combination of a pair of upright housings spaced apart and forming an open top type machine, an indexable work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, an axially supported reciprocating tool slide located between said housings, chucking and feeding mechanisms for the rotary work spindles, actuating means including a change speed gear `box located behind the spindle carrier housing and underneath the chucking and feeding mechanisms, and projecting means carried by one housing and spaced from the other for guiding the sliding tool carrier.

3. In a machine of the class described, the combination of a pair of upright housings spaced apart and forming an open top type machine, an indexable work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, an axially supported reciprocating tool slide located` between said nous` ings, chucking and feeding mechanisms for the rotary work spindles, actuating means including a change speed gear box located behind the spindle carrier housing and underneath the chucking and feeding mechanisms, and project-` ing means carried by one housing and spaced from the other for guiding the sliding tool carrier and comprising a bracket carried on the top of said housing.

4. In a machine of the class described, the combination of a bed, a pair of spaced housings, `one located substantially midway of the bed, an indexable Work holder or spindle carrier mounted in the latter housing, an axially supported tool slide, means for reciprocating said slide, means for guiding said slide, and a change speed power unit located below the plane of the spindles and in the rear of the spindle carrier.

5. In a machine of the class described, the combination of a spindle or work holding carrier, a tool carrier, electrically operated means for indexing one of said carriers, means for locking the indexable carrier, and means controlled by the locking means for starting and stopping the electrical means for operating the indexing means.

6. In a machine of the class described, the combina-tion, of a spindle or work holding carrier, a tool carrier, and electrically operated means forindexing one of said carriers `and comprising a motor, a worm shaft directly driven by said motors, a gear carried by said indexable carrier `and in mesh with said worm shaft, means for locking the indexable carrier and comprising a bolt, and means controlled by the locking bolt for starting and stopping the motor and thereby the `electrically operated indexing means.

`'7. In a machine of the class described, the combination of a spindle or work holding carrier, a tool carrier, electrically operated means for indexing one of said carriers, means for locking the indexable carrier, means controlled by the locking means for starting and stopping the electrical means for operating the indexing means, and means for shifting the locking means into engagement with the periphery of the indexable carrier in readiness to lock the carrier.

`3. In a machine of the class described, the combination of a spindle or work holding carrier, a tool carrier, and` electrically operated means for indexing one of said carriers and comprising a motor, a Worm shaft directly driven by said motor, a gear carried :by said indexable carrier and in mesh with said worm shaft, means for locking the indexable carrier and comprising a bolt, means controlled by the locking bolt for starting and stopping the motor and thereby the electrically operated indexing means, and means for shifting the locking bolt into engagement with the periphery of the indexable carrier in readi* ness to lock the carrier.

9. In a machine of the class described, the combination of a spindle or work holding carrier, a tool carrier, electrically operated means for indexing one of said carriers, means for manually cranking the machine, and means for cutting off the electric power from the motor to the indexing means during the manual cranking thereof.

`10. In a machine of the class described, the combination of an upright housing, an indexable work holder or spindle carrier therein, a stock reel carrier, a top bracket connecting the reel carrier and spindle carrier housing, a cam drum housing, a sliding axially supported tool carrier between said housings, and a cam drum within the drum housing for reciprocating the tool carrier.

1l. In a machine of the class described, the combination of a pair `of upright housings spaced apart forming an open toptype machine, an indexable work holder or spindle carrier within one of said housings, a sliding axially supported tool carrier between said housings, accessory tool spindles between said housings, and a change speed power unit. located below the plane of the spindles and in the rear of the spindle carrier.

12. In a machine of the class described, the combination of a pair of upright housings spaced apart forming an open top type machine, and indexable work holder or spindle carrier within one of said housings, a sliding axially supported tool carrier between said housings, accessory tool spindles between said housings, a cam drum within said drum housing for operating them, a stock reel carrier, and a bracket connecting the tops of said stock reel carrier and the indexable carrier housing.

13. In a machine of the class described, the combination of a pair of upright housings spaced apart forming an open top type machine, an indexable work holder or spindle carrier within one of said housings, a sliding axially supported tool carrier between said housings, accessory tool spindles between said housings, a cam drum within said drum housing for operating them, a stock reel carrier, a bracket connecting the tops of said stock reel carrier and the indexable carrier housing, and a bracket secured to the top of the drum housing and spaced from the spindle carrier housing for guiding the sliding tool carrier.

14. In a machine of the class described, the combination of a pair of. upright housings spaced apart and forming an open top type machine, an indexable rotatable spindle carrier within one of said housings, an actuating cam drum within the other housing, and a chip receiving pan under the space between said housings and accessible at the end thereof under the drum housing.

15. In a machine of the class described, the combination of a pair of upright housings spaced apart and forming an open toptype machine, an indexable work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, an axially supported reciprocating tool slide located between said housings, chucking and feeding mechanisms for the rotary work spindles, actuating means including a change speed gear box located behind the spindle carrier housing and underneath the chucking and feeding mechanisms, and transversely operated slides on one or both sides of the machine, and actuating means therefor located below the spindle carrier.

16. In a machine of the class described, the combination of a pair of upright housings spaced apart and forming an open top type machine, an indexable work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, an axially supported reciprocating tool slide located between said housings, chucking and feeding mechanism for the rotary work spindles, a pair of cam shafts located one at each side of the machine, and a transversely extending worm shaft for operating said cam shafts and located below the spindle carrier.

17. In a machine of the class described, the combination of a pair of upright hou-sings spaced apart and forming an open top type machine, an indexable work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, an axially supported reciprocating tool slide located between said housings, chucking and feeding mechanism for the rotary work spindles, a pair of cam shafts located one at each side of the machine, a transversely extending worm shaft for operating said cam shafts and located below the spindle carrier, and change speed gearing also located behind and below the spindle carrier for controlling said worm shaft.

18. In a machine of the class described, the combination of. a pair of upright housings spaced apart and forming an open top type machine, an indexable work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, an axially supported reciprocating tool slide located between said housings, a cam shaft located below the work spindle carrier, and a power unit for operating said cam shaft and rotating the spindles and located behind said indexable work spindle carrier.

19. In a machine of the class described, the combination of, a pair of upright housings spaced apart and forming an open top type machine, an electrically indexed work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, an axially supported reciprocating tool slide located between said housings, cam shafts located below the work spindle carrier, and a power unit for operating said cam shafts and rotating the spindles and located behind said indexable work spindley carrier and effective to control the speed of the rotary work spindles and the speed of. the cam shafts.

20. In a machine of the class described, the combination of a pair of upright housings spaced apart and forming an open top type machine, an indexable work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, an axially supported reciprocating tool slide located between said housings., a pair of cam shafts located below the workspindle carrier one at each side of the machine, and a power unit for actuating the rotary spindles and cam shafts and effective to control the speed of rotation of the rotary spindles and said cam shafts and located below the work spindle carrier.

21. In a metal working machine having an indexable carrier or turret, electrically operated means for indexing said turret, means for locking the indexable turret, and means controlled by the locking means for starting and stopping the electrical means for operating the indexing means.

22. In a metal working machine having an indexable carrier or turret, electrically operated means for indexing said turret and including a switch, and means for controlling the operation of the switch and comprising means for locking the indexable turret, the contact of said switch eifective fully to index said carrier. 23. In a metal working machine having an indexable carrier or turret, electrically operated means for indexing said turret, means for manually indexing the turret, and means for disconnecting the electrical current when the indexing mechanism is manually operated.

24. In a metal working machine having an indexable carrier or turret, electrically operated means for indexing said turret, a cam shaft, means for stopping the cam shaft, and means thrown into operation on the stoppage of the cam shaft to stop the indexing mechanism.

25. In a machine of the class described, the combination of an indexable spindle or work holding carrier, a sliding tool carrier, means for reciprocating said tool carrier, electrically operated means for indexing said spindle carrier, means for locking the indexable carrier, and means controlled by the locking means for starting and stopping the electrical means for operating the indexing means.

26. In a machine of the class described, the

combination of an indexable spindle carrier, a plurality of rotary work spindles carried thereby, a reciprocating tool carrier, and `electrically operated means for intermittently indexing said spindle carrier and includinga switch, and automatically operative means for controlling the operation of said switch. i

27. In a machine of the class described, the combination of an indexable spindle carrier, a plurality of rotary work spindles carried thereby, a reciprocating tool carrier, and electrically operated means for intermittently indexing said spindle carrier and including aswitch, automatically operative means for controlling the operation of said switch, and means `for manually cranking the machine.

28. In a metal Working machine having an indexable carrier or turret provided with a peripheral gear, a shaft extending transversely to the axis of said carrier and having a worm in engagement with said peripheral gear, andan electrically operated motor at the end of and in direct engagement with said shaft for indexing said carrier and carrier locking means .for controlling the operation of said motor.

29. In a machine of the class described, the combination of an indexable spindle carrier having a peripheral gear, a plurality of rotatable spindles carried by the carrier, a sliding tool carrier, electrical driving means for the spindles and tool carrier, and electrically operated means for indexing said spindle carrier and comprising a worm shaft in mesh with the peripheral gear of the carrier, and a motor at one end of said shaft and in direct engagement therewith.

30. In a machine of the class described, the combination of an indexable spindle carrier having a peripheral gear, a plurality of rotatable spindles carried by the carrier, a sliding tool carrier, electrical driving means for the spindles and tool carrier, and electrically operated means for indexing said spindle carrier and comprising a worm shaft in mesh with the peripheral gear of the carrier, a motor at one end of said shaft and in direct engagement therewith, means for locking the indexable carrier, and means controlled by said locking means for starting and stopping the electrically operated indexing means.

31. In a metal working machine having an indexable spindle carrier with its axis located in a horizontal plane and provided with a peripheral gear, a plurality of rotary spindles carried by the carrier, a sliding tool carrier, electrically operated driving means for the spindle and tool carrier thereby to reciprocate the tool carrier, and electrically operated means for indexing the spindle carrier and including a Worm shaft located transversely of the spindle carrier and below the same and in mesh with the peripheral gear of said carrier.

32. In a metal working machine having an indexable carrier or turret and electrically operated means for indexing the carrier and including a shaft located externally of and at the outer periphery of said carrier and extending transversely to the carrier, intermeshing gearing carried by said carrier and shaft, means for locking said indexable carrier, and means controlled by the locking means for starting and stopping the electrical means for operating the indexing means.

33. In a metal working machine having an indexable carrier or turret provided with a plurality of rotatable spindles, electrical driving means for rotating the spindles, and electrically operated means for indexing said carrier and including a shaft located externally of and at the outer periphery of said i carrier and extending transversely to the carrier, intermeshing gearing carried by said carrier and shaft, means for locking said indexable carrier, and means controlled by the locking means for starting and stopping the electrically operated indexing means without stopping the electrical driving means.

34.111 a metalv working machine having an indexable carrier or turret and a cam shaft for controlling operating elements of the machine,

`electrical driving means for said cam shaft, electrically operated means for directly indexing said carrier, and means controlling the starting and stopping of the electricallyoperated indexing means independently of the electrical driving means for the cam shaft.

35. In a metal working machine comprising a work carrier and a tool carrier, one indexable 20 `work carrier and a tool carrier, one indexable relative to the other and one reciprocal relative to the other and one having a rotatable spindle, electrical driving means for rotating said spindle and reciprocating one carrier, electrically oper- `ated means for directly indexing one of said carriers, and means intermittently operating the electrical means and thereby said indexing means independently of the operation of said electrical driving means.

37. In a machine of the class described, the comb-ination of a bed, a pair of upright housings carried by said bed and spaced apart and forming an open top type machine, an indexable work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, a reciprocating tool slide located between said housings, and a change speed power unit supported below the plane of said work spindles and in the rear of said spindle carrier.

38. In a machine of the class described, the. combination of a bed, a pair of spaced housings, one located substantially midway of the bed and forming an open top type machine, an indexable work holder or spindle carrier mounted in the latter housing, rotary work spindles carried by said carrier, a reciprocating tool slide between the housings, and a change speed power unit located below the plane of the work spindles and in the rear of said spindle carrier.

39. In a machine of the class described, the combination of a spindle or work holding carrier, a tool carrier, and electrically operated means for indexing one of said carriers, means for locking said carrier, and a switch operated thereby, the contact of said switch effective fully to index said carrier.

40. In a machine of the class described, the combination of a pair of upright housings spaced apart and forming an open top type machine, an electrically indexed work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, a reciprocating tool slide located between said housings, a cam shaft located below the work spindle carrier, and a power unit for operating said cam shaft and rotating the spindles and located behind said indexable work spindle carrier and effective to control the speed of the rotary work spindles and the speed of the cam shaft.

` 41. In a machine of the class described, the combination of a pair of upright housings spaced apart and forming an open top type machine, a directly driven electrically indexed work holder or spindle carrier mounted in one of said housings, rotary work spindles carried by said carrier, a reciprocating tool slide located between said housings, a cam shaft located below the work spindle carrier, and a power unit for operating said cam shaft and rotating the spindles and located behind said indexable work spindle carrier and eiective to control the speed of the rotary work spindles and the speed of the cam shaft.

42. In a metal working machine having an indexable carrier or turret, electrically operated means for intermittently indexing said carrier, means for locking the carrier after each indexing, a cam shaft for controlling the operation of said locking means, and automatically operative electrical means thrown into operation .on the unlocking of the carrier by the cam shaft to throw into operation the electrical indexing means and on the locking of the carrier to throw out of operation the electrical indexing means.

43. In a metal working machine having an indexable .carrier or turret, electrically operated means for intermittently indexing said carrier, means for locking the carrier after each indexing, a cam shaft for controlling the operation of said locking means, and automatically operative electrical means thrown into operation by the locking means on the unlocking of the carrier by the cam shaft to throw into operation the electrical indexing means and on the locking of the carrier to throw out of operation the electrical indexing means.

44. In a metal working machine having an indexable carrier or turret having a peripheral gear, electrically operated means for intermittently indexing said carrier and comprising a motor and a gear shaft driven by the motor and in mesh with said carrier gear, means for locking the carrier after each indexing, a cam shaft for controlling the operation of said locking means, and automatically operated electrical means thrown into operation on the unlocking of the carrier by the cam shaft to throw into operation the electrical indexing means and on the locking of the carrier to throw out of operation the electrical indexing means.

45. In a metal working machine having an indexable carrier or turret having a worm gear, electrically operated means for intermittently indexing said carrier and comprising a motor and a worm shaft driven by the motor and in mesh with said carrier worm gear, means for locking the carrier after each indexing, a cam shaft for controlling the operation of said locking means, and automatically operated electrical means thrown into operation by the locking means on the unlocking of the carrier by the cam shaft to throw into operation the electrical indexing means and on the locking of the carrier to throw out of operation the electrical in dexing means.

ALFRED E. DRISSNER.