US819025A - Drill-chuck. - Google Patents

Description

No. 810,025. PLTLNTLD APR. 24, 1906.

G. R. RICH. DRILL 0500K.

APPLICATION FILED 0011.1010044 2 SHEETS-SHEET 1.

No. 819,025. PATBNTED APR. 24, 1906. G. R. RICH.

DRILL CHUCK.

APPLGATION ILED OCT. l0, 1904.

2 SHEETS-SEL 6.5565 ZM/PIQO/"J f 'A Mg Cam@ w UNITED STATES PATENT OFFICE.

GEORGE R. RICH, or CHICAGO, ILLINOIS, AssIGNOR To GEO. R. RICH MANUFACTURING COMPANY, OF BUCHANAN, MICHIGAN, A COR- DRILL-CHUCK.

Specification of Letters Patent.

. Patented April 24, 1906i Application filed October 10, 1904. Serial No.l22'7,'791.

T0 all whom it may concern:

Be it known that I, GEORGE R. RICH, a citizen ofthe United States of America, residing at Chicago, in lthe county of Cook and State of Illinois, have invented certain new and useful Improvements in Drill Chucks, of which the J'following is a specification.

My invention relates to certain new and useful improvements in drill-chucks; and its object'is Vto produce a device of this class which shall have certain advantages, which will appear more fully and at large in the course of this specification. l

To this end my invention consists incertain novel features of construction, which are clearly illustrated in the accompanying drawings, and described in this specification.

In the aforesaid drawings Figure 1 is an' elevation of my improved drilbchuck. Fig.

`2 is a central longitudinal section in the line 2.2 of Fig. 1. Fig. 3 is a pers ective view of the drill-centering bushing. ig. 4 is a perspective view showing the chuckjaws removed from place. Fig. 5 is a section in the line 5 5 of Fi .'2 looking in the direction of the arrow. ig. 6 is a pers ective view of the backing-block ofthe chuc and the crossbar by which it is advanced. Fig. 7 is an elevation of the upper ortion of the chuck, showing the backing-b ook and said cross-bar, the adjusting-ring being moved from lace. Fig. 8 is an elevation of the lower en of a chuck, the clam ing-cap being shown in central longitudina section in the line 2 2 of Fig. 1. Fig. 9 is a section in the line 9 9 of Fig. 2, and Fig. 1'0 is a section in the line 10 10 of Fi 8.

teferring to the drawings, A is the body of my improved chuck, the same being formed from a-rod or. bar of steel rovided with a central longitudinally-exten ing cylindrical bore a,. ada ted to receive a drill. The body A is ,provi ed in its main portion with an external screw-thread, as illustrated, and has a reduced lower end A', which is also externally screw-threaded. Within the cylindrical bore a of the body A is a cylindrical backing-block B, movable longitudinally of the chuck, and

' this backing-block is provided with a transverse perforation through which extends a cross-bar C, the ends oi which project through a longitudinal slot a in the body A of thel chuck. The ends of this cross-bar are square, Figs. and 6, so as to be guided by the sides the cross-bar before the screws of the longitudinal slot a. Aring Dis threal 5l 5 ed on the upper portion of the bod A, a y said ring is provided with an interna annul r groove d, in which lie the heads of screws screwed into the ends ofthe cross-bar C. The

ring D is provided with a perforation d', 6o

bringing the ring D down over the ends of said cross-bar. The ring will p ss freely over 4 are inserted. After the parts have been placed in this position the screws b are inserted and the parts of the deviceare irxr ly secured together. The 7o backing-block can then be moved up and down the body of the drill with perfect ease by rotating the ring D.

The lower end of the chuck-body is provided with a transverse groove a2, the same being undercut at its upper end at a3. Two jaws Eaz'e provided below the lower end of the chuck-body, each of said jaws having a squared central upward projection e, whichlies in the transverse groove a2, the main por- 8 tions of the jaw tapering from top to bottorr.l Each .of lthe squared upward projections is provided at its outer top corners with lugs e', which engage with the undercut portion c3 at the top of the transverse groove a2. F screws upV over the reduced portion'A of the chuck-body and engages with the coned surfaces on the jaws to force them together upon the drill, which is shown at G. The arrangement of the lugs e is such that when 9o the cap is screwed down, so as to loosen the jaws, they will swing apart by gravity, hanging upon the lugs e. In this-way the drill can very readily be removed. A bushing H is provided near the lower end of the chuckbody, which acts to center the drill G, and in ractice a set of bushings of various internal diameters are furnished with a single chuck,

so that drills of various sizes can be used.

It will be seen that the backing-block Bis .roo

backing-block to center the upper en d of the 1o 5 drill, for the backing pressure of the drill itself forces it to the center of the concave face.

A cap.85

I realize that oonsiderablevariation is possible in the details of this construction Without departing from the spirit of the invention, and I do not intend to limit myself to the s eoifio form hereinshown and described.

I e aim as new and desire to secure by Letters Patent- In a device ofthe class described, the oombination with a hollow chuck-body provided with a longitudinal slot, of a backing-block longitudinally movable Within the chuck, projections on the backing-block extending out through the slot, a ring -on the chuckbody and engaging the projections on the backing-block to move the saine lorygitudinally inthe chuck, jaws adapted tofgras a drill, and means for closing the jaws.. in ef pendently of the movement of the backingblook.

In Witness whereof I have signed the above a plieation for Letters Patent, at Chieago,in t e county of Cook and State of Illinois, this 21st day of September, A. D. 1904.

GEORGE R. RICH.

Images