US541029A

US541029A - Tapping attachment for drill-presses

Info

Publication number: US541029A
Authority: US
Publication date: 1895-06-11
Anticipated expiration: 1912-06-11

Description

2 Sheets-Sheet 1.

(No Model.)

G. WOODWORTH, TAPPING ATTACHMENT FOR DRILL PRESSES. No. 541,029.

R 0 T N E V N 'iTll Pategted June 11,1895.

llllllllllllflllfllllflllllllf fi. l'llllll'llllll llllllllllll'l, llllllll lllll 2 SheetsSheet 2.

(No Model.)

G. WOO-DWORTI-I. TAPPING ATTACHMENT FOR DRILL PRESSES.

THE ncmms PETIRS ca. moro-umu wasnms'r UNITE STATES 'ATENT OFFI E;

GEORGE VVOODWORTH, OF BROOKLYN, NEW YORK.

TAPPING ATTACHMENT FOR DRlLL- PRESSES.

SPECIFICATION forming part of Letters Patent No. 541,029, dated June 11, 1 895.

I Application filed June 24, 1892. Serial No. 437,838- (No model.)

' i To all whom it may concern: 7

' ments for Drill-Presses, of ing is a specification.

Be it known that I, GEORGE Woopwonrn, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State.

of New York, have invented certain new and useful Improvements in Tapping Attachwhich the fol low- My invention consists of a tapping spindle mounted in an improved, simple and efficient construction and arrangement of apparatus, in suitable'relation t the drilling spindle for bringing the holes drilled into position for receiving the tap without shifting the work on the table, all as hereinafter fully described, reference being made to the accompanying drawings, in which Figure 1 is a horizontal section of a drillpress having my improved attachment on line at :0, Fig. 2. Fig. 2 is partly a side elevation and partly a sectional elevation. Fig. 3 is a horizontal section on line y y, Fig. 2. Fig. 4 is a horizontal section of parts on line to to, Figs. 2 and 5. Fig. 5 is an elevation of part of the drill, with the tapping attachment in section, on line 2 z, Figs. land 3.

On the arm a, of the standard b,'supporting the drill spindle c, of usual form and arrangement, I have provided the laterally projecting bracket d, in the outer extremity of which is v mounted a vertical counter shaft e, parallel and so as to swing on the axis of shaft e;

At the upper side of the swinging bracket h, the tapping spindle has aloosewheel j, geared with another wheel is, keyed on the counter shaft 6, and at the lower side of said bracket 71. the tapping spindle has another loose wheel Z, geared with shaft e, through the intermediate wheels m, and the wheel 12 on said shaft 6. Wheels and Z have clutch hubs j and-Z, respectively with which the clutch 0, splined or feather keyed on the drill mandrel engages to drive the spindle forward for inserting the tap, or backward for withdrawing it according as said clutch is engagedwith wheelj, or Z, by the shifting lever 19.

, The tap spindle is adapted to slide up and down in the wheels j and Z, and clutch 0, as usual in such devices and it is provided with the coiled spring q, to hold it up in the normal position said spring being applied on the spindle between the hub of the hand wheels, at the upper end of the spindle and the plate t, employed for the spring to rest on and also as a guard to prevent wheel j from rising along with the spindle when it moves upward, said plate having its support on the end of the swinging bracket h, and its lower extremity 15, extends under wheel Z, to hold it in its Working position. The wheelsj and Z may however be held in position by means of collars on the inner ends of the clutch hubs or other approved means.

v The gear train Z, m, and n, for withdrawing the tap from the work is adjusted for higher speed of the tap spindle than the train j, k, for entering-the tap as is usual in such cases.

I have provided an adjustable automatic tripping device for unolutching and stopping the tapping spindle which consists of the extensible sliding rod u, fixed in an upright support under the hand wheel coming in contact with the upper end of said rod when the tap has nearly entered to the desired depth in the Work and then force said rod downward. The extensible roduis connected at its lower end with one end of the rock lever 12, pivoted at its center and connected at its other end with the clutch lever 19, by the rod w, so that the downward movement of rod 11 shifts clutch 0, out of connection with the hub of wheel j, and into connection with the hub of wheel Z, to reverse the tap and withdraw it from the work automatically.

The standard 00 supports the wheel g, on the drill spindle'c, which has to slide up and down in said wheel. Wheel 9 may be shifted upward and supported out of gear with wheel f, as indicated in dotted lines, in Figs. 2 and 5, when the machine is to be used for drilling only.

It will be seen that holes drilled in the work supported on the table y, may be brought under the tap suitably for being entered by the rr I tap, without shifting the work on the table, this being accomplished by swinging table g, on the standard I), and swinging the tapping spindle on the pivot e, to the point where the paths of the hole and the tap cross as indicated by the

dotted lines

2 and 3.

When the tap is to be entered the attendant clutches the tap spindle with the driving train and then with the hand Wheel 3, presses the spindle down until the tap enters, and when the tap is withdrawn from the work by the reverse motion the spring again shifts the spindle to the normal position.

To secure the tapping spindle in position while at work a curved bar a is attached to the swinging bracket h, and a set screw 0 having a handle d is fitted in the base plate I) of the standard w so as to be screwed against the bar arranged under said base and thus secure it in a way enabling it to be secured and released readily.

I claim 1. The combination with the drill spindle located in fixed supports, and with the swing ing work table, of the swinging tapping spindle parallel with the drill spindle, and having its pivotal center eccentric to that of the table, said tapping spindle having suitable direct and reverse driving gear substantially as described.

2. The combination with the drill spindle, and with the swinging work table, of the tapping spindle parallel with the drill spindle, the swinging frame pivoted on the bracket of the spindle supporting arm, the counter shaft in the axis of the tapping spindle supporting frame, and the gears connecting the drill spindle and tapping spindle substantially as described.

Signed at New York, in the county of New York and State of New York, this 26th day of March, A. I). 1892.

GEORGE WOODWORTII.

\Vitnesses:

W. J. MORGAN, W. 13. EARLL.