US766723A - Drilling and tapping machine. - Google Patents

Description

PATENTED AUG. 2, 1904.

O. C. NEWTON.

DRILLING AND TAPPING MACHINE.

APPLICATION FILED JAN. 26, 1901.

4 SHEETSSHBBT 1.

N0 MODEL.

! IZUCEZEYVF marks crj/wlam. 2 fus- (izforrzepfii H7 Twi 257w fi mdwa No. 766,723. PATENTED AUG. 2, 1904. G. C. NEWTON.

DRILLING AND TAPPING MACHINE.

APPLICATION FILED JAN. 26, 1901.

N0 MODEL. 4 SHEETS--SHEBT 2.

%%Wv VX No. 766,723. PATENTED AUG. 2, 1904.

0. o. NEWTON. DRILLING AND TAPPING MACHINE.

APPLIOATION FILED JAN. 26, 1901.

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wan M No. 766,723. PATENTED AUG. 2, 1904. C. G. NEWTON. DRILLING AND TAPPING MACHINE. Y

APPLIOATION FILED JAN. 26, 1901.

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Mm WM Patented August 2, 1904.

UNITED STATES PATENT OEEIcE.

CHARLES C. NEWVTON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE NEWTON MACHINE TOOL \VOR-KS, INCORPORATED, OF PHILADEL- PHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

DRILLING AND TAPPING MACHINE.

SPECIFICATION forming part of Letters Patent No. 766,723, dated August 2, 1904.

Application filed January 26,1901. Serial No. 44,867. LNo modelfi To aZZ whom it may concern.-

Be it known that 1, CHARLES C. NEWTON, a citizen of the United States, residing in Phila delphia, Pennsylvania, have invented certain 5 Improvements in Drilling and Tapping Machines, of which the following is a specification.

drilling and tapping machine.

Fig. 2 is a vertical sectional view on the line 2 2, Fig. 1. Fig. 3 1s a vertical sectional view on the line 3 3, Fig. 1. on the line L I, Fig. 3.

plan view on the line 5 5, Fig.

Fig. at is a sectional plan view Fig. 5 1s a sectional 3; and Fig. 6

is a view of a detail of my invention.

A is the support upon which the frame B, carrying the drill-spindle and the tapping-spindle, is mounted. suitable form.

This support can be of any I have shown in the drawings a support having flanges adapted to grooves in the back of the frame B, so that the frame can slide on the support and yet will be held rigidly thereto when at rest.

This support may form the arm of a radial drill or maybe a cross-bar suitably supported for carrying any number of frames B. On the support is a rack a, with which gears a pinion a on the shaft A, mounted in bearings in the frame B and provided with a hand-wheel a, so that by turning this hand-wheel (4 either the tappingspindle or the drilling-spindle can be moved over the work. An indicator-hand a on the wheel is preferably used in connection with a pin (0*, projecting from the frame B, so that the position of the frame can be accurately determined by alining the hand with the pin,

as will be readily understood.

and E is the tapping-spindle.

The spindles in the present instance are so spaced that the distance between the center of one spindle and the center of the other is equal to one revolution of the hand-wheel (6 so that when the hand-wheel is turned one full revolution the drill-spindle can be moved clear of the work and the tzwping-spindle can be moved directly above the work and in position to tap the thread in the hole drilled by the drill carried by the spindle D.

C is the driving-shaft. On this drivingshaft is a three-step cone-pulley a and a spiral gear a, which meshes with a spiral gear (Z, adapted to a bearing in the upper end of the frame B and confined thereto by a screw-pin (Z The spiral gear (1 is also splined to the spindle D, so that the spindle must turn with the gear, but can slide longitudinally in it.

Splined to the spindle D is a hub D, having a gear-wheel J on one end and the pinion (1 cut in the hub at the opposite end, as clearly shown in Figs. 1 and 3, and loose on the spindle E is a gear-wheel a, with which the wheel (P meshes. This wheel a is supported by a projection 7; on the frame B. The pinion (Z on the huh I) meshes with an intermediate pinion f on the stud F, Fig. 5, and this pinion fin turn meshes with a gear-wheel e loose on the spindle E and supported by the frame B.

Between the wheels 5 and e on the spindle E is a clutch-sleeve E, having teeth in its upper and lower faces, and on the under side of the wheel c are teeth with which the upper teeth of the clutch E may engage, and in the upper side of the gear-wheel are teeth with which the teeth on the under side of the clutch may engage. The clutch-sleeve is controlled by a lever E", Fig. 2, and can be locked in either of its three positions by a pin 6", entering holes in the segment, as clearly shown in Fig. 2. \Vhen the clutch-sleeve is in themid-position, as shown in the drawings, the tapping-spindle is at rest. \Vhen the clutchsleeve is raised to engage with the wheel a, the spindle E turns at a quick speed similar to the drill, and this speed is used when it is desired to back out the tap after the article has been threaded, while when the sleeve is clutched to the gear-wheel e the tap-spindle E is driven slowly. This gearing is used when the tap is cutting the thread in the article.

The upper end (Z of the drill-spindle is reduced, and on this reduced portion of the spindle is a sleeve G, on which are rack-teeth g, meshing with the pinion g on the shaft g mounted in hearings in the extension B of the frame B. On this shaft is a worm-wheel g meshing with the worm g on the diagonal shaft G, extending within easy reach of the operator and having at its lower end a handwheel 9 On turning this shaft the drillspindle can be raised or lowered to any position desired.

On the shaft H, mounted in hearings in the frame B, is a three-step cone-pulley h, and this cone-pulley is belted to the cone-pulley 0 on the'shaft O, and on the opposite end of the shaft H is a worm ii, meshing with the wormwheel if on the cone b loose on the shaft G, as shown in Fig. 6. Mounted on the shaft G is a sleeve having a tapered cavity fitting the cone.

Extending longitudinally into one end of the shaft G is a shifting rod I, having a pin 71, which passes through a slotin the shaft and engages the cone This rod I has at its lower end an operating-disk 21', engaging the threaded end of the shaft G, so that on turning this disk 2" the cone if will be thrown into frictional contact with the wheel 7& and the shaft Gr will be turned, and consequently will feed the spindle D automatically as it is rotated. By turning the rod I in the opposite direction the cone 7?) will be released and the automatic feed will stop, and the spindle can then be fed, if desired, by turning the handwheel 9 On the lower end of the sleeve G is a collarj, and pivoted to this collar is a counterbalancing-arm J pivoted at j to a link J, pivoted at f to the frame B. At the outer end of this arm J is a weight J This weight counterbalances the spindle D.

The end of the spindle E is reduced and on this end is a sleeve k, pivoted to which is a lever K. This lever K is pivoted at it" to a link K, pivoted at k to the frame of the machine and has a counterbalancing-weight K Attached to an extension of the arm K is a depending bar H, which is within easy reach of the operator.

So it will be seen by the above-described mechanism that the article placed on the table of the drill can be secured in position and first drilled by operating the mechanism connected with the drill-spindle D and then after the work has been drilled and the spindle returned clear of the work by turning the hand-wheel a one complete revolution in the present instance the drill-spindle D will be moved away and the tapping-spindle E will be moved directly in position in line with the Work and then by forcing down the spindle by catching the handhold Z0 and shifting the clutch by the lever E the tap can be entered into the work and then as soon as the tap has entered it will feed itself and cut the desired thread. When the thread has been cut the distance required, the clutch-sleeve is reversed, reversing the direction of rotation of the spindle, and the tap will be backed out of the work and the work can be detached from the table and a new piece put in position. In the meantime the hand-wheel a can be turned so as to bring the drill-spindle D again in line with the work.

I claim as my invention 1. The combination in a combined drilling and tapping machine of a support, a frame mounted thereon, means for shifting the frame, a drill-spindle and a tap-spindle mounted on the frame, means for driving said spindles and a support upon which the article to be drilled and tapped is secured, said means for shifting the frame including a rotatable device having an indicator with a relatively fixed piece placed to coact with said indicator, the parts being so proportioned that a certain number of complete revolutions of the rotatable device will carry the frame from the drilling to the tapping position, substantially as described.

2. The combination of a support, a frame arranged to slide thereon, a rack on the support, a shaft mounted in bearings on the frame, a pinion on the shaft meshing with the rack, a drill-spindle and a tap-spindle mounted on the frame, means for driving said spindles, an operating device on the shaft, an indicator carried by the shaft, 2. pin projecting from the frame and placed to coact with said indicator, the parts being so proportioned that a certain number of complete revolutions of the rotatable device will carry the frame from the drilling to the tapping position, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

(JHARLES C. NEWTON.

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