US660249A - Drilling-machine. - Google Patents

Description

Patented out. 23, |900, A. .1. eswfofm.-v v DBILLING MACHINE. 1`

(Application lpd Jan. 8; 1900.?

3 Sheets-Sheet l.

'(No Model.)

No. 660,249. Patented out. 2'3, |900.'v

A. .1. mrfonn. DRIL'LING MACHINE.

(Application led Isn. 8, 1900.) No Model.) 3 Sheets-Sheet 2.

ITM/2114:. l: zz.)-

No. 600,249. Patented oct. 23, |900.

A; J. 0|FF-00.

DBILLING MACHINE. l

(Application led Jun. 8, 1900.) A (No Mindel.) l z 3 Sheets-Sheet 3.

UNTTED STATES PATENT OFFICE.

ALBERT J. GIFFORD, OF WORCESTER, MASSACHUSETTS.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent N o. 660,249, dated October 23, 1900.

Application filed January 8, 1900. Serial No. 695. (No model.) i

To @ZZ whom it may concern:

Be it known that I, ALBERT J. GIFFORD, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Drilling-Machine, of which the following is a specification.

My invention relates, primarily, to the ordinary form of drilling-machines; and the especial object of my present invention is to provide a simple, efficient, inexpensive, and durable form of drilling-machine, having a single operating-handle for raising and lowering the drillspindle and for throwing in and out a train of gearing for feeding the drill-spindle by power, all of said operations to be attained by rotation of said handle in the same or parallel planes.

To this end my invention consists, primarily, of the combination of the drill-spindle with a special form of feeding connections, and although this special form of feeding connections has been especially designed for use in drills, the same may be used to advantage as feeding devices for other types of machinery.

A further object of my invention is to provide a drilling-machine with an adjustable stop mechanism for throwing the power-feed ont of operation, and to combine the operati ng connections for the drill-spindle'before referred to with slow-feed connections, which may be operated by hand when it is desiredl to move the drill-spindle at slow speeds or when the drill-spindle becomes stuck, so as to require the exercise of more power in moving the same.

To these ends my invention consists of the parts and combinations of parts, as hereinafter described,and more particularly pointed out in the claims at the end of this specification.

In the accompanying three sheets of drawings, Figure l is a side viewshowing sufficient parts of a drilling-machine to illustrate the application of my invention thereto. Fig. 2 is a transversesectional view of the same. Fig. 3 is a sectional side view taken on the line 3 3 of Fig. 2. Fig. 4 is a detail view of the friction-clutch forming part of the power-feed train. Figs. 5 and 6 are detail views illustrating parts of the adjustable stop mechanisms for throwing the power-feed out of operation, and Figs. 7 to 9, inclusive,A are transverse sectional views of the rollerclutch controlled by the operating-handle. v

In the use of an ordinary upright drillingmachine the power-feed train for feeding down the drill-spindle by power is thrown into operation by the engagement ot' a toothed or friction clutch operated by a knob or button, while the quick approach and withdrawal connections are operated by a separate and distinct handle, said handle being rendered inoperative for this purpose when the powerfeed is thrown in. When the power-feed is in operation, the drill -spindle cannot be shifted or moved by hand, andas now ordinarily constructed an operator is required to throw out the power-feed by operating one handle when the machine has finished drilling one hole, then to raise the drill-spindle by operating a separate handle, and after having positioned the work for drilling the second hole to lower the drill to the work by the quick-approach handle, the handle controlling the power-feed being again used to start the machine into operation.

The especial obj ect of my present invention is to provide a drilling-machine in which the drill-spindle may always be moved or shifted in either direction by hand, as desired, and in which a single handle is employed by rotation in the saine plane for moving the drillspindle either up or down and for throwing in and out the power-feed. To accomplish this result, l preferably employ a rollerclutch, the operating-handle being connected to transmit direct motion to the clutch-rolls when it is desired to raise or lower the drillwhen it is desired to feed the drill-spindle by power.

A further object of my invention is to provide a drilling-machine with. a novel form ofstopping connections for throwing the powerfeed out of operation. To accomplish this object, I employa frictionclutch for forming part of the power-train, which friction-clutch may be set or released by means of a spring connection, the spring connection being caused to yield to throw the power-feed out of operation when the drill-spindle reaches the desired point.

The friction-clutch which ICO transmitting motion thereto.

I employ in connection with these stopping devices also enables me to provide the machine with a slow-feed handle, which may be utilized to raise or lower the drill-spindle when it is desired to move the same at slower speed or with greater power than is possible from the operating-handle.

Referring to the drawings and in detail, my drilling-machine as herein illustrated comprises an upright or pedestal 10, secured on t-op of which is an overhanging casting 11. .Iournaled in the casting 11 is an upright drillspindle 12.4 The drill-spindle 12 is movably mounted or splined in a bevel-gear 13, which meshes with and is driven from a bevel-gear 14, carried by a shaft 15, whichshaft 15 may be driven from anyordinary source ofpower in the usual manner. At its lower end the drillspindle l2 is journaled in a quill 16 and is provided with collars, so as to be moved up and down as the quill 16 is raised and lowered. The quill 16 is provided with a rack 5G for raising and lowering the same.l

The power-feed train for feeding the drillspindle by power, as herein illustrated, comprises a cone-pulley 2l on the drill-spindle, which is belted to and drives a cone-pulley 22. Secured to or turning with the cone-pulley 22 is a pinion 23, which meshes with and drives a gear 24, splined on the upright shaft 25. The upright shaft 25 is provided at its lower end with a bevel-pinion 26, which meshes with and drives a bevel-gear 27, which bevel-gear 27 is loosely mounted on a shaft 57 and forms one member of a friction-clutch for Secured on the shaft 57 is a worm or screw 29, which meshes with and drives a worin-wheel 30, journaled on a shaft 31 and forming one member of a' roller-clutch, as hereinafter described. As shown most clearlyin Figs. 2 and 3, the shaft 3l is provided with a geared section 32, meshing with the rack 56 of the quill 16, so that as the shaft 3l is turned the drill-spindle will be raised or lowered. Keyed onto or secured to the shaft 3l and forming the other member of the roller-clutch referred to is a camsection 33. The cam or clutch section 33 is notched or provided with oppositely-facing inclines, and fitting into the notches of the cam-section, so as to be interposed between said cam-section 33 and the other clutch-section 30, are a plurality of rolls 34.

The rolls 34 are illustrated as of cylindrical form; but in their operation, as hereinafter described, the function of the rolls 34 could be equally well performed by balls or other bodies circular in cross-section, and it is to be understood that by the term rolls, as hereinafter employed, I intend to refer to any desired bodies circular in cross-section, which may be wedged between or may coperate with the clutch-sections to form the roller-clutch.

Mounted loosely on the outer end of the shaft 3l is an Operating-handle 35, preferably having the form of a cross. Extending in from the handle 35 and interposed between the rolls 34 are operating-fingers 36.

In the use of the construction as thus far described the power-feed train will normally act to turn or rotate the worm-wheel 30; but by adjusting the roller-clutch, so that the parts assume the position illustrated in Fig. 7, the worm-wheel 30 will turn loosely, and the power-feed for the drill-spindle will he rendered inoperative. When it is desired to bring the power-feed into operation, a slight movement of the handle 35 will wedge the rolls 34 between the parts of the roller-clutch, as illustrated in Fig. 9, so that the wormwheel or clutch-section 30 will feed down the drill-spindle. 'Phe greater the resistance encountered bythe downward feed of the drillspindle the more tightly will the rolls be wedged in place between the clutch-sections, insu ring an accurate and powerful down-feed. At the saine time, no matter what position may be occupied by the rolls, the operatinghandle may be turned to move the drill-spindle either up or down, as desired, by hand. For example, if the parts are in the normal position illustrated in Fig. 7 and it is desired to raise the drill-spindle the operatinghandle will be turned to the right, as illustrated in Fig. 1, so that the fingers 36 will transmit pressure through the rolls 34 to the cam or clutch section 33, turning` the shaft 3l and raising the drill-spindle, as desired, while the rolls 34 will simply slip or roll on the inner surface of the worm-wheel 30. On the other hand, suppose that the power-feed is acting, the parts standing in the position illustrated in Fig. 9, and it is desired to move the drill-spindle downward more rapidly. This is a condition which frequently arises, for example, in boring out two bosses arranged in line with each other, in which case after the drill has passed through the first boss it is desirable to move the same down to engage the second boss. If this action is desired, the operating-handle, as illustrated in Fig. 1, will be turned toward the left. This will cause the operating-lingers 36 to transmit pressure through the rolls 34 to the cam -section 33, carrying the drill-spindle down, while the balls simply roll ahead or slip forward on the inner surface of the wormwheel. By means of this construction it will be seen that I have provided a drilling-machine which is capable of more simple and direct operation than machines which have heretofore been employed, as all the normal operations of the machine are controlled from a single handle, all motions of which are in the same plane, which acts not only to raise or lower the drill-spindle, as desired, but which also serves to throw in or release the powerfeed train, as required. The mere fact of bringing the drill to the Work by the handle 35 starts the power-feed, while a slight reverse rotation stops or prevents it.

In some cases it may be desirable-for example, in tapping nuts or in similar opera- TOO ros

TIO

tionsto secure a rigid connection between the'operating-handle and the raising and lowerin g shaft 3l, so as to prevent any possibility of the power-feed beingthrownin. When this operation is desired, a set-screw 37, as shown in Fig. 2, may be screwed in to engage a notch in the raising and lowering shaft to secure the operating-handle and raising and lowering shaft rigidly together.

The automatic stopping connections which I may employ for automatically throwing out the power-feed when desired are most clearly illustrated in Figs. 2 to 6, inclusive. As shown most clearly in Figs. 3 and 4, the friction-clutch, having one of its members formed by the bevel-gear 27, comprises an inner clutch member 40, which is keyed to or secured to the shaft 57. To connect the clutch members 27 and 40, I employ a normallycontracted springring 4l, which may be arranged as most clearly illustrated in Fig. 4. A taper-ended expanding-pin 42 is mounted in the'clufch-section 40, and in order to operate the expanding-pin 42 I employ a yielding or spring connection comprising. an operating pin 43, having an inclined or cammed end engaginga corresponding end of the wedging-pin '42. A screw 45, having a knuried head, may be operated to compress a coiled spring 44 to force in the operatingpin 43, so that the wedging-pin 42 will eX- pand the spring-ring 41 to connect the clutchsections.

'lo form an automatic stop for th rowing out the power-feed of the drill, I employ an adjustable stop-pin carried by the quill, which acts throughintermediate connections to compress the spring 44 and release the clutch, so as to stop the down-feed of the drill. most clearly illustrated in Fig. 2, a stop-pin 4G basa head fitting into a dovetail groove in the quill lo'. The stop-pin 46 may be clamped in its adjusted position by a nut 47, and the stop-pin 46 is arranged to engage an inclined or cam face of a yoke 48, as shown on an enlarged scale in higs. 5 and 6. The arms of the yoke 48 are arranged to engage a collar 49, connected to the operating-pin 43 and having a slight movement lengthwise on shaft 57, so as to force the operating-pin 43 back and release the clutch when the desired' downward limit' of travel has been reached. The friction clutch as thus constructed and mounted in the power-feed train of a drill embodying my invention also permits me to employ a slow-feed handle, which may be used when it is desired to move the drill-spindle more slowly or with greater power than is possible from the operating-handle.

As shown in Figs. l and 3, a slow-feed handle 50 is secured on the end of the shaft 57, and in order to use the slow-feed handle it is simply necessary to release the friction-clutch by unscrewing the screw 45, and by then throwing in the roller-clutch from the operating-handle 35 the slow-feed handle may be used to raise or lower the drill-spindle, as desired. y For example, whenever a' drill becomes stuck or so firmly embedded in the Work that it cannot be Withdrawn by operating the ordinary operating-handle 35 the operating-handle 35 may be moved slightly to the right to wedge the clutch-rolls in the position illustrated in Fig. 8, so that by then turning the slow-feed handle 50 a more powerful connection maybe secured for lifting the drill-spindle than could be secured from the direct operatingshandle 35.

I am aware that numerous changes Amay be made in the construction of my drilling-machine by those who are skilledin the art and that the feeding devices as herein combined and operated may be used to advantage in other machines as well. I do not wish, therefore. to be limited to the construction herein shown and described; but l What I do claim, and desire to secllre by Letters Patent of the United States, is-

l. In a drilling-machine the combination of a drill-spindle, a power-feed train therefor, and a single handle connected so that said handle may be rotated to effect a hand-fed drilling operation, the raising or lowering of the drill-Spindle, and theuthrowing` in or out of the power-feed train, substantially as described.

2. In adrilling-machine, the combination of a drill-spindle, a power-feed train therefor, a roller-clutch, and a single handle connected to transmit by rotation in the same or parallel planes direct motion' to the clutch-rolls when it is desired to raise or lower the drillspindle, and to secure a hand-fed drilling operation, and to wedge or unwedge the clutchrolls when it is desired to throw in or out the power-feed train, substantially as described.

3. Inadrilling-machine,thecombination ot' a drill-spindle, a roller-clutch comprising a power-driven clutch-section, a notched campiece, and 'rolls interposed between The campiece and clutch-section, and a single handle connected so that by rotation it may transmit direct motion to the clutch-rolls when it is desired to secure a hand-fed drilling operation, and may wedge or unwedge the clutchrolls to throw in or out the power-feed train, substantially as described.

4. Ina drilling-machine, the combination of a'drill-spindle, a power-feed train therefor, a

i roller-clutch, and a single operating-handle having fingers interposed between the clutchrolis so that by turning the handle a direct motion may be transmitted to the clutch-rolls when it is desired to secure a hand-fed drilling operation, and so that the clutch -rolls may be wedged when a power feed is desired, and unwedged to disconnect the power-feed, substantially as described.

. 5. In a drilling-machine, the combination of a drill-spindle, a roller-clutch comprising a power-driven clutch-section, a notched `campiece, and rolls interposed between the campiece and clutch-section, and a single handle having operating-fingers interposed between IOO the clutch-rolls so that by turning said handle a direct motion maybe transmitted to the clutch-rolls when a hand-fed drilling operation is desired, and the rolls may be wedged when a power-feed is desired, and unwedged to release the power-feed, substantially as described.

6. In a drillin g-lnachin e, the combination of a drill-spindle, a shaft geared to raise and lower the same, a roller-clutch comprising a power-d riVen clutch-section j ournaled loosely on the raising and lowering shaft, a notched cam-piece, rolls interposed between the campiece and clutch-section, and a single handle connected so that by turning said handle a direct motion may be transmitted to the clutchrolls when a hand-fed drilling operation is desired, and the clutch-rolls may be wedged when a power-feed is desired, and unwedged to release the power-feed, substantially as described.

7. In a drilling-machine, the combination of a drill-spindle, a shaft geared to raise and lower the same, a roller-clutch comprising a power-driven clutch-section journaled loosely on the raising and lowering shaft, a notched cam-piece secured rigidly on the raising and lowering shaft, rolls interposed between the cam-piece and clutch-section, and a handle having operating-fingers interposed between the clutch-rolls, whereby a direct motion may be transmitted through the clutch-rolls to secure a hand-fed drilling operation, and' the clutch-rolls may be wedged to secure a powerfed drilling operation, and unwedged to release the power-feed all by turning or rotating said handle, substantially as described.

S. In a drillingmachine,the combination of a drill-spindle, a power-feed train therefor, a single handle connected so that a hand-fed drilling operation, a power-fed drilling operation, and a release of the power-feed train may all be secured by rotating said handle, and an adjustable stop mechanism for automatically throwing the power-feed train out of operation, substantially as described.

9. In a drilling-machine, the combination of a drill-spindle, a power-feed train comprising a clutch, a spring connection for setting and releasing the clutch, and an adjustable stop mechanism for causing the spring connection to yield to throw the power-feed out of operation, substantially as described.

IO. In a drilling-machine, the combination of a drill-spindle, a power-feed train, a friction-clutch comprising two clutch-sections, a

normally-contracted spring-ring for connecting the clutch-sections, an expanding-pin, a spring connection for operating the expanding-pin to set or release the clutch, and an adjustable stop mechanism for causing the spring connection to yield to throw the powerfeed out of operation, substantially as described.

11. In a drilling-machine the combination of a drill-spindle, extending through a quill, a power-feed train for raising and lowering the quill, a clutch, a spring connection for setting and releasing the clutch, and a stop-pin adjustably mounted in the quill and operating throughintermediate connectionsto cause the springconnection for the clutch to yield to throw the power-feed out of operation, substantially as described.

12. In a drilling-machine, the combination of a drill-spindle, extending through a quill, a power-feed train for raising and lowering the quill, a clutch comprising two clutch-seci tions, a normally-contracted spring-ring for connecting the clutch-sections, an expandingpin, a spring connection for operating the expanding-pin to set or release the clutch, a stoppin adjustably mounted in the quill, and a swinging yoke arranged to be engaged by the stop-pin to cause the spring connection to yield to throw the power-feed out of operation, substantially as described.

13. In a drilling-machine,the combination of a drill-spindle, a shaft geared to raise and lower the drill-spindle a roller-clutch comprising an outer ring or clutch-section, a cam or second clutch-section secured on the shaft and having oppositely-faciuginclines or cams, and rolls interposed between said clutch-sections, a slow-feed handle geared to turn the outer ring or clutch-section, and a single operating-handle arranged to transmit by rotation in the same or parallel planes `direct motion to the clutch-rolls when it is desired to raise or lower the drill-spindle, and to wedge said rolls in either direction when it is desired to raise or lower the drill-spindle from the slow-feed handle, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ALBERT J. GIFFORD.

Witnesses LoUIs W. SOUTHGATE, PHILIP W. SOUTHGATE.

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