US623140A - Drilling-machine - Google Patents

Drilling-machine Download PDF

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US623140A
US623140A US623140DA US623140A US 623140 A US623140 A US 623140A US 623140D A US623140D A US 623140DA US 623140 A US623140 A US 623140A
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shaft
gear
spindle
tool
hub
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23GTHREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G1/00Thread cutting; Automatic machines specially designed therefor
    • B23G1/16Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70Stationary or movable members for carrying working-spindles for attachment of tools or work
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/65Means to drive tool
    • Y10T408/66Friction gearing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/65Means to drive tool
    • Y10T408/675Means to drive tool including means to move Tool along tool-axis
    • Y10T408/6771Means to drive tool including means to move Tool along tool-axis with clutch means
    • Y10T408/6774Means to drive tool including means to move Tool along tool-axis with clutch means including plural speed drive

Description

Patented Apr. l8, I899.
no. 623,l40.
H. H. CUMMINGS.
DRILLING MACHINE.
, (Application filed Jan. 10, 1898.)
3 Sheets-Sheet l.
040 Model.)
ttllaualiilvv Z fizz/radar.
N J Patented Apr; l8, I899.
H. H. CUMMINGS, DRILLING MACHINE.
(Application filed Jan. 10, 1898.)
3 Sheets-Sh'eet 2.
(No Model.)
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K lgwwsaea jvvaroeon dam/10C flwfl 6202714 15 5 ihvrrnn STATES PATENT ()rr cn.
HENRY H. CUMMINGS, OF MALDEN, MASSACHUSETTS DRILLING-MACHINE.
SPECIFICATION forming part of Letters Patent No. 623,140, dated April 18, 1899.
Application filed January 10' 1898- Serial No. 666,185. (No model.)
To It 111700771 it may concern: Be it known that 1, HENRY H. CUMMINGS, of Malden, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Drilling-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters and numerals on the drawings representing like parts.
This invention relates more particularly to upright drills, and has for its object the prod uction of various novel features of construction in such apparatus whereby the operation thereof is improved and made more readily controllable by the operator.
I have provided convenient speed-changing mechanism in connection with the rotatable tool-holding spindle, and in connection with such mechanism I employ a suitable movable toolrack so arranged that by proper movement thereof the speed of the tool-spindle will be automatically regulated in accordance with the diameter of the drill or other tool to be used.
Various other features of my invention will be hereinafter fully described in the specification and particularly pointed out in the claims.
Figure 1, in side elevation, represents an upright drill embodying my present invention, the standard being partially broken out. Fig. 2 is a vertical sectional view of a portion of the platen-carrier on the line a: m, Fig. 1, looking to the left. Fig. 2 is a horizontal sectional view thereof on the line 00 w thereof, Fig. Fig. 3 is an enlarged top or plan view of the head of the apparatus shown in Fig. 1 and partially broken out. Fig. 4 is a vertical sectionalview of the head,taken on the irregular line Ma, Fig. 3. Fig. 5 is a detail in side elevation and partly broken out of the means for controlling the power-transmitting mechanism of the tool-spindle. Fig. 6 is a vertical transverse section of the head on the line a in", Fig. 4, looking toward the right. Fig. 7 is an enlarged side elevation, partly broken out, of the traveler and the feed mechanism carried thereby. Fig. 7 is a detail view of the controlling device for the tool-feed mechanism. Fig. 8 is a horizontal sectional view of y y, some of the gears being in elevation; and Fig. 9 is a partial front view of the mechanism shown in Fig. 5.
The working parts of the apparatus are sup ported on an upright cylindrical and preferably hollow column or standard A, having a laterally-extended base A the standard having on its exterior a vertical guide A for the traveler, to be described, and a longitudinal recess A in the standard receives a threaded shaft or rod to. As shown in Fig. a, the upper end or head A of the standard has a bearing a for the hub a of the bevel-geared, secured to the rod to and shouldered at a the gear and rod being rot-atabl y supported in the bearing by the shoulder. A hand-lever a, pivoted on the head at a is bifurcated at its inner end to embrace loosely the rod or shaft a beneath the hub a to raise or lower said shaft slightly, for a purpose to be described.
The platen or work-support B, of usual construction, is mounted on a platen-carrier B the latter being provided with asplit hub B to embrace the standard A, the parts of the carrier separated by the slit 2, Fig. 2, being connected by suitable clamp-bolts Z), the eyes I) of which are engaged by eccentric portions 1) of a stud mounted in ears 3 of the carrier and actuated by a lever-arm b The interior of the hub B? is annularly recessed, as at N, Figs. 2 and 2, to receive therein and form a guide for the ends of a block 19 having a threaded ear 19 into which the threaded shaft centers. Byrotation of the latter the platencarrier B is raised or lowered, the carrier at such time being unclamped, rotation being transmitted to the shaft Ct through the gear a It will be seen in Figs. 1 and 4 that normally the shaft ais out of gear with its operating mechanism, and so long as the platencarrier B is clamped the shaft cannot be moved longitudinally by the lever a to bring it into mesh to be rotated, thus effectually preventing accidents due to oversight or carelessness.
The head A ofthe standard is bent over to provide an overhanging arm A Figs. 1, 3, and 4, having a vertical bearing a, preferably bushed, as at a Fig. 4, to receive the sleevelike hub 0 of a large bevel-gear c, a collar a the mechanism shown in Fig. 7 on the line 1 fast on the upper end of the hub resting on the overturned end of the bushing and retaining the gear in place. Within the bevelgear is a smaller bevel-gear 0, (see Fig. 4,) secured thereto, as by screws 6, the faces of bot-h gears being upturned, the gear 0 being formed on an annular flange 0 provided on its exterior with preferably undercut grooves 7 7, for a purpose to be referred to.
The drill or tool spindle D is. extended through the hub e and is longitudinally grooved at 8 to receive a suitable spline on the hub, as is common in drills, whereby the spindle is rotated with the gears c and c and also longitudinally movable relatively thereto to feed the tool to the work. A sleeve (Z is secured to the lower end of the spindle, having a longitudinal rack-bar on its inner side to mesh with the teeth of the hub (2 forming part of an internal gear 61 and external worm-gear (Z said hub being rotatably mounted on the horizontal shaft (Z (see Fig. 8) of a hand-wheel D This shaft has a hearing at one end in the side of the casting E, forming the traveler, the other side of the traveler having a boss d to provide a hearing for the hub (Z a vertical bearing (1 embracing the spindle-sleeve (Z and being cut away at (Z to receive the rack-bar d.
When the worm-gear d is rotated by a worm d on an upright shaft (1 the spindle D is moved longitudinallyto feed the tool T, Fig. 1, held in a suitable chuck D on the lower end of the spindle.
It is sometimes desirable to control the feed of the tool by hand, and for this purpose I have secured to the rear end of the shaft d a pinion d in mesh with the gear (Z on one end of a short shaft (Z the other end of the short shaft having a pinion c 15 fast thereon.
This short shaft, as shown in Fig. 8, is extended through a sleeve-like bearing (1, fast on a controller-plate (PT, the sleeve being extended through one side of the traveler E and forming the fulcrum for the controller-plate, a bearingd formed on the inner face of the other side of the traveler, receiving in it the free end of the shaft d. ,An intermediate gear d is pivoted on the controller-plate and in mesh with the pinion (Z When the controller-plate is swung into its opposite extreme position from that shown in Fig. 7, the intermediate gear (Z is brought into mesh with the internal circular gear (1 and by rotating the hand-wheelD a slow powerful feed will be effected through the pinion (Z gear (Z pinion (Z and intermediate (1 to the hubgear (2 and thence to the feed-rack b. If it is desired to run the tool-spindle up or down rapidly, the controller-plate (Z is moved into mid-position, as shown in Fig. 1, which disengages the Worm (Z and worm-gear (1 while it does not throw the intermediate d into engagement with the gear d At the same time a pin (Z on the hand-wheel D is pushed into one of several holes (Z (see dotted lines, Fig. 7) in the combined worm-wheel and internal gear, so that the latter will be rotated with the hand-wheel, thus transmitting move ment through the hub-gear d directly to the rack b.
The lower end of the shaft (Z is preferably made spherical, as at 20, Fig. '7, to fit into a correspondingly-shaped recess in a bearingplate 21, fulcrumed at 22 on the traveler, said bearing-plate having fast thereon an arm 23, the end of which fits loosely into a notch 24: in the carrier-plate, thus making therewith a species of toggle-joint.
The controller-plate is provided at its outer end with a handle 6 the inner extended end of which forms a latch (Z to enter one or more recesses, as (Z in a locking-plate (Z on the side of the traveler, the latch being normally pressed toward the locking-plate by a suit able spring .9. WVhen the controller-plate is to be moved by hand, the operator grasps the handle 61 and turns it, to withdraw the latch (Z against the pressure of the spring, thereby swing the bearing-plate 21 to the right to thus move the worm d from engagement with the worm-gear (1 The inner face of the latch 61 maybe beveled in order to be engaged by a trip, shown as a finger25, Fig. 1, carried by the sleeve (1, and when the spindle is fed down to the proper point the finger 25 will pass beneath the latch and lift itfrom the holding-notch, the weight of the controller-plate moving it into position to disengage the worm and worm-gear.
Referring to Fig. 4, the worm-shaft (Z is extended up through a support 27, secured to or forming part of an upturned hub-like bearing (Z socketed at its upper end at (Z to receive the ball-like head (Z of a sleeve (Z and loosely surrounding the shaft (1 the lower beveled end of the sleeve resting upon a cam-collar d provided with a suitable handle (1 the cam-collar being sustained by the support 27. This ball-and-socket hearing at the upper end of the worm-shaft (l permits the slight lateral movement thereof necessary to disengage the worm and worm-wheel without interfering with the rotative or longitudinal movement of the shaft, the latter being necessary when the traveler is moved up or down on the'standard A, a counterbalancing-weight WV being attached by a flexibleconnect-ion 4 (see dotted lines, Fig. 1) to the traveler, the connection or connections passing over one or more guide-sheaves 5.
A collar a on the sleeve-hub e is shaped to form a pulley a connected by a suitable belt 64 with the driving member a of a speed controlling mechanism, the driven member (0 of which is represented as a heavy casting splined to the shaft cZ -and located above the spherical head (Z The driving and driven members are provided on their inner faces each with an annular concavity, as clearly shown in Fig. 4, and one or more frietion-wheels c0 are interposed between said members and within their grooves mounted to rotate in the forked ends of suitable shafts a, having their hearings in a casting a, rigidly secured to the bearing (1. The two shafts are connected by intermeshing segment-gears a acted upon by a spring-controlled friction-pad a while one of the shafts a is provided with a hand-le ver (L21.
The speed-changing mechanism shown is substantially such as forms the subject-matter of United States Patent No. 529,713, granted to me November 27, 1894, and to which reference may behad, rotation of the shafts a" moving the peripheries of the friction-wheels a toward or from the center of rotation of the shaft (Z thus varying the speed imparted by the driving member a to the driven member a. The weight of this latter.member' provides sufficient pressure to normally maintain the device operative, and when it is desired to throw the speedcontrolling mechanism out of operation the cam-ring (Z is moved to lift the sleeve d, and thereby the driven member a, raising the latter from contact with the friction-wheels a By the mechanism herein shown the feed of the tool is absolutely under the control of the operator, and by the movement of the lever a the speed of the feed can be controlled with great delicacy.
The traveler E is split at 30, as shownin Fig. 8, and provided with clamping-ears 31 to embrace the guide A, a'clamping device E, of usual construction in such apparatus, being provided to clamp the traveler in adjusted position.
The head of the standard, at its rear end, is provided with an overhanging arm A to which is secured, as by screws 34, the upper end of a substantially -shaped casting G, the lower laterally-extended ends of the latter having upright hubs or bearing-bosses g (most clearly shown in Fig. 6) to receive the lower ends of upright rotatable standards 9', bifurcated at their upper ends to receive and support rotatable friction -wheels g The said standards are provided with gears g in mesh with the toothed outer edges g of segment-gears g, (see dotted lines, Fig. 3,) the latter meshing with each other and being fulcruined at g on the lower end of the casting G, so that rotative movementof either standard g will impart a like rotative movement, but in the opposite direction, to the other standard. The casting G is longitudinally bored at G Fig. 4, to receive therethrough a sleeve 72, secured in the casting bya clampscrew 40, Fig. 4, and forming a bearing for the rear end of the main shaft H, said shaft having another bearing at h in the part of the head A as shown in said Fig. 4. The main shaft has secured thereto the hub m of a friction-pulley M,.the said pulley having in its face concaved annular grooves adapted to be entered by the shiftable friction disks or wheels g described, the latter having, preferably, non-metallic peripheries. The sleeve h receives upon it the hub a of a second friction member N, provided with an annular flange N to form a belt-pulley and adapted to be driven by a belt from any suitable source of power and to be continuously rotated, the said member N having in its inner face an annular concavity to be entered by the disks or wheels g The outer end of the pulley N has a beveled annular face a, adapted to cooperate at times with a similarly-beveled face of a clutch member N, rigidly secured to the main shaft by set-screw 43, so that the clutch member N and the friction member M will move simultaneously when the shaft H is moved longitudinally.
Referring to Fig. 4, it will be noted that the sleeve h is laterally flanged at 7L2 at its outer end, and between the flange and the end of the hub n may be interposed washers to, preventing movement of the friction member N longitudinally of the shaft to the right, viewing said figure.
The main shaft has thereon a beveled gear W, the hub of which is annularly grooved at h to be partially embraced by the bearing 72., which is substantially semicircular in form, a key it on the shaft enteringa suitable longitudinal slot in the hub'of the gear, whereby the latter will be rotated with the shaft, but permitting the latter to be moved longitudinally therein. The beveled gear h is adjacent the like gear a on the upper end of the shaft a, and when the latter is raised by means of the hand-lever a the gears a and 71 are brought into mesh, so that rotation of the main shaft will act through the vertical shaft to to raise or lower the platen-carrier B A bevel-gear h is provided with a sleevelike hub 71.", through which the front end of the main shaft is extended, said hub being connected to the shaft to rotate therewith by the key 7r", and a split collarh surrounds the hub loosely and is retained thereon by the upturned part of the flanged end of the hub h said collar being supported in a bearing h on the head. the gear 7L longitudinally on the main shaft it is thrown into or out of mesh-with the gear 0, which is fast on the hub e and a second bevel-gear h is also mounted on the main shaft keyed thereto and longitudinally movable thcreon, the hub of the gear having an annular groove h Referring to Figs. 1, 4, and 5, a stud 70 projects from the side of the overhanging arm A and has mounted thereon the hub W of a hand-lever it, said hub next the side of the arm having secured to it aplate 70 provided with a cam-slot k to receive a roller or other stud k on the collar 77. the side of the arm A being slotted at to permit movement of the stud 70 as best shown in Fig. 5. A yoke 70" enters the groove 71 of the hub or gear h and has pivoted thereto a link 70, piv- (See Fig. 4.) By moving Ix. x it otally connected at its other end to a wristpin on the outer side of the plate H, the pivot of the link passing through a slot 200 in the head. (See Fig. 5, dotted lines.) If the handle 70 is swung up to turn the hub and plate in the direction of the arrow 48, Fig. 5, the cam-slot k will act on the stud 7.5 to draw the gear h to the right, viewing Fig. l, and through the wrist-pin 70 and link 70 will draw the gear 70 to the left. The effect of this is to disengage gears 70 and c and bring the gears 71 and 0 into engagement, and it will be obvious from the size of the gears c and c that the former will rotate the tool-spindle D slowly and with'more power, While the gear 0 will rotate it at a higher speed, but not so powerfully. This provision for change of power on the tool-spindle is very convenient and increases the range of the machine in a very simple and effective manner.
An annularly-grooved collar 0, fast on the main shaft H, is embraced by the forked end of an arm 0, pivoted at 0 on the inner end of a spring-controlled plunger 0 mounted in a bearing on the upturned portion A of the head, said arm 0 carrying near its lower end two parallel links 0 pivoted on the arm at 0 and provided, preferably, with antifriction-rolls 44. A stud o rigidly secured in the part A of the head,is extended through longitudinal slots 0 in the links and provides a fulcrum for a cam 0 interposed between the two rolls 44 and connected above its fulcrum by a rod 0 to a rocker-arm 0 keyed on a shipper-shaft 0 mounted in the bearing 0 on the overhanging arm A and is provided with a shipper-lever 0 the shaft 0 sliding vertically through the rocker-arm.
It will be seen from the foregoing description that movement of the shipper-lever o to rock the shipper-shaft will act to swing the cam o in one direction or theother on its fulcrum to act upon one of the rolls 44:,andthereby swing the forked arm 0 to the right or left, Fig. 4, to move the main shaft longitudinally, the spring 3 on the plunger 0 taking up shock and preventing binding of parts, it being remembered that the pulley N and friction member N are continuously rotated. If the main shaft is moved to the left, Fig. 4, the friction member N will be brought into engagement with the cooperating face n of the pulley N ,so that the shaft will be rotated in the same direction as and with the speed of the pulley N the longitudinal movement of the shaft referred to moving the friction member M to the left and removing the pressure from the intervening friction disks or wheels g On the other hand, if the shaft is moved into the position shown in Fig. 4
then the rotary movement of the friction member N will be transmitted to the shaft through the friction member M by the friction-disks g and the member M and shaft will be rotated in a direction opposite to the rotation of the member N and at a speed relative to the latter, depending upon the angularity of the friction-disks g This speed changing and controlling mechanism is substantially the same as that forming the subject-matter of United States Patent No. 529,713, granted to me November 27, 1894, to which reference may be had.
An arm A on the side of the standard supports, as herein shown, a circular plate R, provided near its periphery with a series of holes R (see Fig. 3) of suitable size to receive the shanks of the drills or other tools of various sizes adapted to be used on the machine, and on its under side the plate R has a cam-rib R, which isengaged by afork R at the end of a lever B, fulcrumed at R on an arm 9 extended from one of the bearings g, the inner end of the said arm R having thereon a segment-gear R in engagement with the adjacent gear 9 on the standard g.
By rotation of the tool support or carrier R the cam will act through the intervening mechanism to turn the friction disks or Wheels g and vary their angularity relative to the cooperating members M N, and thus "ary the speed of the former.
Inasmuch as the speed for drillsor similar tools is greater for those of small diameter than for those of larger diameter I utilize the connections between the carrier R and the speed changing mechanism just described to automatically set the speed of, the machine to the diameter of the drill to be used.
An index P may be secured to the arm A and upturned adjacent the periphery of the tool-support R, the shape of the cam B being such that if the support or carrier R is turned until the drill of the proper size is opposite the index such movement will set the speedcontrolling mechanism to give the proper speed to the spindle for the tool of that size.
The shipper-shaft 0 (see Fig. 9) is longitudinally grooved at 0 to be entered by a .keyon a hub if, provided with a suitable handknob i andoppositely-extended arms 25 t in different horizontal planes, the hub 25 having a spring-catch to engage one or the other of two notches t in the bearing 0 of the shipper-shaft, the latter having another hearing 0 on the traveler E. Stops Z 25 are adapted to be secured in the undercut grooves 7 of the flange c on gear 0 to cooperate, respectively, with the arms 25' and 1 When the spindle has rotated sufficiently to bring the stop 25 into engagement with arm t, the shipper-shaft will be turned to reverse the direction of rotation of the main shaft, and the tool-spindle D will be rotated in the opposite direction until the other stop 15 engages the arm t rocking the shipper-shaft in the opposite direction and causing the direction of rotation of the spindle D to be again reversed. This rotation of the tool-spindle first in one direction and then in the other is convenient for many purposes, and so far as I am aware such arrangement is novel.
When it is not desired to utilize the automatic reversing device, the catch 25 is released and the hub 15 moved down into the position shown in Fig. 9, so that the arm t t -will not be in the path of movement of the stops.
Myinvention is not restricted to the precise construction of partsas herein shown, as the same may be varied or rearranged without departing from the spirit and scope of my invention, and so far as I am aware it is broadly new to automatically vary the rate of speed of rotation of a tool-spindle in accordance with the diameter of the tool to be used by or through the movement of the tool carrier or support.
Having fully described my invention, what I claim, and desire to secure by Letters Pat cut, is
1. In an apparatus of the class described, a tool-spindle, means, including speed-changin g mechanism, to rotate it at different speeds, and a controlling device for said mechanism, to automatically set the speed of the spindle according to the diameter of the tool to be used, substantially as described.
2. In an apparatus of the class described, a tool-spindle, means to rotate it, including speed-changing mechanism, and controlling means therefor including a movable tool-carrier and a fixed index, whereby when the carrier is moved to bring the tool to be used opposite the index the speed-changing mechanism will thereby be automatically set to effect rotation of the spindle at the proper speed for said tool, substantially as described.
3. In an apparatus of the class described, a tool spindle, means to rotate it, including speed-changing mechanism, and a movable tool-carrier connected with and to control said mechanism, whereby movement of the carrier will effect a proportional movement of the said mechanism to rotate the spindle at the speed required for the diameter of the tool to be used, substantially as described.
4. In an apparatus of the class described, a tool-spindle, alarge and a small gear connected therewith, a main shaft provided with two gears adapted to be brought into engagement with the spindle-gears one at a time, manually-operated means to effect such engagement, and speed-changin g mechanism for said shaft, including a driven pulley loose relatively to the shaft, a pulley to be driven, connected to rotate with the shaft, said pulleys being annularly concaved on their inner faces, and a controlling friction-disk interposed be tween the said pulleys, substantially as described.
5. In an apparatus'of the class described, a rotatable tool-spindle, two concentric rigidlyconnected gears having a single, extended hub on which they are fixed, said hub being connected with and to permit longitudinal movement of the spindle, a fixed bearing for the gear-hub, and means to regulate the longitudinal movement of the spindle, combined with a main driving-shaft, two gears rotatable therewith and longitudinally movable thereon, and means to move said gears longitudinally, to bring one into engagement with one of the spindle-gears, and disengage the other gears, and vice versa, substantially as described.
6. In an apparatus of the class described, a rotatable tool-spindle, a large and a small gear rigidly connected together and connected to said spindle to rotate it and also to permit longitudinal movement of the spindle, and a fixed bearing for said connected gears, combined with a main driving-shaft, two independent gears mounted upon and to rotate with said shaft and separately movable longitudinally upon it, to separately engage the small and large spindle-gears respectively, and means to disengage one driving-gear from its spindle-gear and to cause engagement of the other two gears,substantially as described.
7. In an apparatus of the class described, the main driving-shaft, two gears the hubs of which are connected to rotate with said shaft and be movable longitudinally thereon,a camplate mounted in a fixed bearing, a stud on one of said gear-hubs in engagement with the cam, a link attached to the other hub and pivoted eccentrically on the cam, and means to rotate the latter, whereby the gears will be moved toward or from each other on the main shaft, substantially as described.
8. In an apparatus of the class described, a main standard, a platen carrier vertically movable thereon, means to clamp the carrier on the standard, and a rotatable actuatinggear supported by the standard, combined with a threaded operating-shaft in engagement with the carrier, a gear on said shaft, and means to move said shaft longitudinally with the carrier when unclamped, to engage or disengage the said gears, substantially as described.
9. In an apparatus of the class described, a main standard, a platencarrier vertically movable thereon, means to clamp the carrier on the standard, and a rotatable actuatinggear supported by the standard, combined with a rotatable shaft threaded to engage said carrier, a vertically-movable bearing for said shaft, operable manually when the carrier is unclainped, and a gear on the shaft, to be brought into mesh with the actuating-gear when the platen-carrier is to be raised or lowered by power, substantially as described.
10. In apparatus of the class described, a standard, a tool-spindle, a main shaft, means to vary the speed thereof, connections between said shaft and spindle, to rotate the latter, and a platen-carrier-actuating gear on the main shaft, combined with a platen-carrier, a lifting-shaft threaded thereto and pro vided with a gear, and means to movesaid lifting-shaft to engage or disengage its gear and the actuating-gear, substantially as described.
11. In" an apparatus of the class described, a vertical longitudinally-movable tool-spindle, a fixed bearing, a hub rotatable therein and splined to the spindle, a large and a small bevel-gear fast on said hub, the former being on an annular flange provided with external grooves, and adjustable stops to beheld there in, combined with a main shaft, gears thereon to engage, one at a time, the small and large spindle-gears respectively, reversing mechanism for the main shaft, and controlling means therefor operated by said stops, substantially as described.
12. In an apparatus of the class described, a rotatable tool-spi ndle,a gear rotatable therewith and relatively to which the spindle is longitudinally movable, and adjustable stops movable with the gear, combined with a main driving-shaft having a gear to mesh with the spindle-gear,.and reversing mechanism controlled by said stops, to rotate the tool-spindle first in one and then in the other direction, substantially as described.
1-3.. In an apparatus of the class described, a rotatable tool-spindle, a traveler, mechanism carried thereby to etfect feed of the spindle rapidly or slowly by hand, or mechanically, a driving-shaft to actuate said mechanism for mechanical feed of the spindle, and a single controlling device to eifect either fast or slow feed by hand, or to cause engagement and disengagement of said driving-shaft and mechanism, substantially as described.
14. In an apparatus of the class described, a main driving-shaft,speed changing mechanism therefor, including a driving-pulley and a pulley to be driven, the latter fast on the shaft, said pulleys being aunularly concaved on their inner faces, an interposed frictiondisk, and a support therefor, combined with a movable tool-carrier, and connections between it and the disk-support,wherebymovement of the tool-carrier will proportionally vary the angula-rity of the friction-disk relatively to the pulleys, to change the speed of the main shaft, substantially as described.
15. In an apparatus of the class described, a rotatable tool-spindle having a feed-rack thereon, a traveler, gearing carried thereby to engage said rack and feed the spindle longitudinally, a manually-operated actuator for said gearing, independent means, including speed-changing mechanism, to actuate said gearing, and a single controlling device to provide for manual or mechanical operation of the gearing, and to govern the speed of the former, substantially as described.
16. In an apparatus of the class described, a longitudinally-movable tool-spindle, means to rotate it, reversing mechanism for said means,and controllingmeans for thereversin g mechanism,rotatable and concentric with the spindle, whereby the latter will be automatically and partiallyrotated first in one and then in the other direction, substantially as described.
17. A member adapted to be rotated, mechanism to rotate it in opposite directions, and controlling means for said mechanism, governed directly by and concentric with the rotatable member, whereby the latter will be automatically and partially rotated first in one and then in the other direction, substantially as described.
In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.
HENRY I-I. CUMMINGS.
Witnesses:
JOHN C. EDWARDS, AUGUSTA E. DEAN.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110002920A1 (en) * 2004-10-29 2011-01-06 University Of Southern California Combination cancer immunotherapy with co-stimulatory molecules

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110002920A1 (en) * 2004-10-29 2011-01-06 University Of Southern California Combination cancer immunotherapy with co-stimulatory molecules
US20110002921A1 (en) * 2004-10-29 2011-01-06 University Of Southern California Combination cancer immunotherapy with co-stimulatory molecules
US8268788B2 (en) 2004-10-29 2012-09-18 University Of Southern California Combination cancer immunotherapy with co-stimulatory molecules

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