US1382003A - Drill-holder - Google Patents

Description

H. W. LIGHTNEH.

DRILL HOLDER.

APPLICATION FILED FEB. 24, 1920.

1,382,003, a MM June 21, 1921'.

H. W. LIGHTNER.

DRILL HOLDER.

APPLICATION FILED $55.24, 1920.

Q/z/ner 2 SHEETS-SHEET 2 Patented June 21 UNITED STATES PATENT OFFICE.

HENRY W. LIGHTNER, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO WILMARTH 8a MORMAN COMPANY, OF GRAND RAPIDS, MICHIGAN, A CORPORATION OF MICH- IG N.

DRILL-HOLDER.

To all whom it may concern:

Be it known that I, HENRY W. LIGHTNER, a citizen of the United States of America, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Drill-Holders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to drill holders and is directed to a holder for drills which may be applied to a grinding machine to hold a drill in relation to the grinding wheel of the machine for properly grinding said drill. lVith certain types of drills grinding the same after the length of the drill has been diminished from long use and many grindings is diflicult and almost impossible. Withmy invention not only is it possible to ind the drill to the limit of its use as a drill but with the same holder all lengths of drills from the shortest possible drill to the longest used may be held in the holder for grinding. My invention consists of many novel details of constructionfor effectively accomplishing this end, namely, the holding of drills irrespective of their. lengths and the holding of drills particularly of very short length and up to thelimit of use of the drill. Various other objects and purposes together with novel constructions for attaining the same will appear as understanding of the invention is had from the following description taken in connection with the accompanying drawings, in which;

Figure 1 is a side elevation of the drill holder in its operative relation to a grinding wheel.

Fig. 2 is a side elevation of the front end of the drill holder.

'Fig. 3 is a transverse section through the drill holder and showing a rear elevation of the adjustable intermediate supporting member of the drill holder.

Fig. 4 is a plan of the drill holder,said intermediate drill holder member being removed.

Fig. 5 is a front elevation of a novel form of tail block used with the drill holder.

Fig. 6 is a front elevation of the drill holder and showing it swung over from the vertical for clearance of a drill held therein,

and

V Specification of Letters Patent.

Patented June 21, 1921.

Application filed February 24, 1920. Serial No. 361,035.

Fig. 7 is a side elevation of the front end of the drill holder, the intermediate drill support being removed therefrom.

Like reference characters refer to like parts. in the different views of the drawings.

The holder is adapted for use-in connection with a grinder which, in construction, may comprise a supporting post 1 at the upper end of which a shaft 2 is rotatably mounted and adapted to be driven. by a belt around a pulley 3 on the shaft. A grinding wheel 1 is fixed at one end of and turns with the shaft.

A rod 5 is fixed to and extends from the post 1 on which a bracket 6. is adjustably mounted to turn about the axis of said rod; said bracket is equipped with any suitable means for holding. it in any position to which it may be adjusted. An arm 7 is mounted on the bracket, being. provided at ts inner end with a cylindrical post 8 which extends into. a bearing formed. at the upper end of the bracket 6. The axis of this "post is inclined .to the vertical. Tliecupper end of arm 7 is equipped with a seat 9 concaved on its upper side against which the lower eonvex side of bar 10 of the drill holder rests. By turning the screw 11 said bar 10 may be swung from one side to the other, thus changingthe position of the drill holding device carried on said bar relative to the grinding wheel and giving proper clearance therefor. The drill holder may be clamped to any position to which it may be adjusted by tightening the clamping nut 9.

The main supporting portion of the drill holder comprises the lower bar 10 p from which, at, itsforward end, two integral angularly disposed wings 12 extend upwardly being located at angle to each otherand making a V-shaped trough or seat for the front end of the drill. Two brackets 13 project laterally from bar lO adjacent opposite ends of said bar and serve as a support for a rod 14 which is disposed between them. An intermediate support for the drill comprising two angularly positioned wings 15 is adjustably mounted on the rod 14 an integral boss 16 extending from the lower part of said intermediate support and being bored to pass freely over rod 14. This intermediwardly about the axis of the rod 14: and moved to an inoperative position. Normally, when in operative position it is held against accidental movement by a spring catch 15 which engages with the bar 10 as shown in Fig. 3.

, A bracket 17 is adjustably mounted to be moved lengthwise of the bar 10 and serves as a support to carry a tail block 18. Said block is secured at the forward end of a rod 19 which may be adjusted back and forth through the bracket 17 by turning a suitable hand wheel 20 connected therewith. The lower end 18 of the block 18 is pointed hav ing inclined sides cut on the same angle as the inner sides of the drill supporting members 12 and 15. At the upper end of the block 18 lug 21 projects forward through which a threaded rod 22 passes connecting with a drill shank rest 23. From the lower end of the part 23 of the rest a trough shaped member 2% extends forward. This shank rest is slidably mounted in the front side of the block 18 and may be adjusted to different positions by operating the nut 25 threaded onto the rod 22.

At the front edge of one side 12 of the for ward drill support a plate 26 is connected, the same being adjustable to a plurality of difiz'erentpositions; A number of upper and lower slots 27 are cut through the plate at different angles and are secured to the forward edgeof one side 12 by means of screws 28 passing through the slots. This plate serves to support the point or lip of the drill while it is being ground and by adjust ng the same to different positions any'size of drill and any kind either flat or twist drills, may

- be properly ground.

' In practice a drill of considerable length may be placed in the two \l- shaped seats 12 and 15 and the end of the shank thereof rest in the rest 24: which, being mounted. on the tail block, may be moved forward to any desired position and likewise moved up or down to any desired position. Many types of drills have an enlarged collar between the shank and the operating portion of the drill and said collar may be located directly against the rear edges of the sides 15 of the intermediate drill supporting member. When-a drill becomes worn'and shortened the set screw which holds the intermediate supporting member in position on rod 14 is loosened and said intermediate supporting member swung to one side, whereupon the drill may be heldin the forward support only and between it and the tail block. From the construction it is possible to properly support every type of drill which is to be, ground and this irrespective of the length of the effective portion of the drill. A drill holderof the character described is particularly useful with. drills which have intermediate enlarged collars. The entire length of the drill may be used and it is not necessary to imperfectly grind the same by hand or discard them when the drill has shortened beyond a certain point. The construction is relatively simple and is particularly effective for the proper grinding of drills.

I claim: r

1. A drill holder for use in grinding drills, comprising a bar provided at one end with a V-shaped upwardly extending. drill rest formed by two angularly positioned sides, a rod mounted lengthwise and to one sideof the bar, a second V-shaped rest slidably and rotatably mounted on the rod and adapted to be positioned above the bar in alinement with the first V-shaped rest, and a tail block adjustably mounted on and above the bar back of the second rest, substantially as and for the purposes described.

2. A drill holder for use in grinding drills; comprising a bar formed at one'end with an upwardly extending V-shaped drill rest, a second V-shaped drill rest normally located back of the first rest, and means for mounting said second rest alongsideof the bar for adjustment lengthwise thereof or for lateral movement to inoperative position away from the bar, substantially as described. I

3. A drill holder for use in grinding drills, comprising a bar formed at one end withan upwardly projectingV-shaped rest, a rod mounted at one side of and parallel with the bar, and a second V-shaped rest adjustably mounted on the rod and adapted to be moved lengthwise thereof or turned outwardly about the axis of the rod, said second rest being adapted to be turned to operative position directly back of and in alinement with the first rest, substantially as described.

4. A drill holder for use in grindingdrills, comprising a bar, an integral V-shaped drill rest located at and extending above the front end of the bar, two brackets projecting laterally from the bar at spaced apart points, a rod disposed between the brackets, and a second V-shaped drill rest normally located 7 directly back of the first rest and provided with a boss through which the rodpasses tail block adjustably mounted on and in front of the bracket to move toward or away from the bracket, a drill shank rest mounted in front of the tail block, and means for adjusting said; drill shank rest up and down with respect to the tail block, substantially as described.

6. A drill holder for use in grinding drills, comprising an elongated bar formed at its front end with an upwardly extending V- shaped drill rest, a bracket on the bar back of said rest, a tail block located in front of the bracket and formed with a V-shaped lower end, means for mounting said tail block on the bracket for adjustment toward or away from the bracket, a drill shank rest slid-ably mounted for vertical movements on the front side of the tail block and including a forwardly projecting trough-shaped memher in which the end of a drill shank may rest, and means for raising and lowering said drill shank rest with respect to the tail block, substantially as described.

7. A drill holder for use in grinding drills, comprising an elongated bar formed at its front end with an upwardly extending V- shaped drill rest, two spaced apart brackets extending laterally from the lower side of the bar a short distance and thence turned upwardly, a rod located between the brackets in parallelism with the bar, a second V shaped drill rest normally located above the bar back of the first rest, said second rest being provided with an outwardly extending boss at its lower portion through which said rod passes whereby the second rest may be moved back and forth lengthwise of the rod or turned laterally away from the bar, and a yielding catch for holding the second rest in normal operative position over the bar, substantially as described.

8. In combination with a grinding machine having a grinding wheel, a support mounted on the grinding machine to turn about the axis inclined to the vertical, a drill holder mounted on the support including an elongated bar located directly above the support, means for adjusting said bar with respect to the support to turn about a longitudinal axis parallel with and above the bar, a V-shaped drill rest located at the front end of the bar in close proximity to the grinding wheel, a second V-shaped drill rest mounted on the bar, means for mounting said second drill rest for movement lengthwise of the bar or for lateral turning movement to an inoperative position at one side of the bar, and a tail block mounted on and above the bar back of the second drill rest, substantially as described.

In testimony whereof I afiix my signature.

HENRY W. LIGHTNER.

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