US1176215A

US1176215A - Drill-lock.

Info

Publication number: US1176215A
Application number: US5525915A
Authority: US
Inventors: Henry S Griffin
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-10-11
Filing date: 1915-10-11
Publication date: 1916-03-21
Anticipated expiration: 1933-03-21

Description

I gage the 'drill, a'ndto provide novel means fiENnY s. GRIFFIN, on PIQUA, OHIO.

ravens;

Siietiification of Letters Patent.

rat eareairar. 21, 1916.

Applicationfiledflctober11, 1915. seriauvasaass.

To all whom it mag concern:

Beit known thatxl, I'IENRY S. GRIFFIN, a citizen of the United States residingat Piqua, in the county of Miami and State of "Ohio, have invented anew and useful Drill-Lock of which the. following is a Specification.

The device forming the subject matter of this application is a drill lock, adapted to. hold againstrotation with respect to a drill rod, a drill which has a threaded connection with the drill rod.

, The invention aims to provide a locking member of novel form, movable with respect to the drill rod and adapted to enwhereby a movement o fthe locking member maybe prevented.

Another ob ect of the invention is to provide a structure of the type above described in which the locking parts will not the invention herein disclosed can be made deteriorate due to rust or otherwise.

It is within the province ofthe disclosure to improve generally and to enhance the utility of devices of that type to "which the present invention appertains.

With the above and other objects in view which will appear as the description proceeds, the, invention resides. inthe con-ibination and arrangement of parts and in the details of constructionhereinafter described and claimed, it being understood that c'hangesin the precise embodiment of within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawing:Figure 1 shows the invention in side elevation, parts being broken away, the locking mechanism being in the positions assumed when the drill is upheld to the drill rod; Fig. 2

is a cross section on the line 2-2 of Fig.1;

- a threaded recess at formed in the lower end of the drill rod the shank 3 defining a transverse shoulder 5 in the drill 2 about the shank. In the shoulder 5, to-one side of the threaded shank 3 a recess 6 is'formed and in. the lower endof the drill rod 1 tooneside of the threaded recess ehandpen- 7 is formed, the opening 7 being adapted to be alined vertically with the seat 6 under conditions which will be pointed out hereinafter. F or-med in the drill rodl and co1nmunicatmg with the opening 7 in the lower end of the drill rodis an upright passage 8, the upper end of which is threaded as indicated at 9. At its upper end. the passage 8 crm-municates with a lateral recess 10 formed in the drill rod. 1. y

Movablefllongitudinally for adjutsment in the pa'ssage 8 ;is locking member 11 preferably in the formof a rod, the upper extremity of the locking memberll being threaded as shown at 12 so as to cooperate with the threaded portion 9 of the passage 8. In the upper end of the locking rod 11,a screw driver kerf 14 is formed, the

kerf 14: being accessibleby way of the recess "10 in the drill rod 1.

end of; therod 11 is journaled for rotation a in the latch block 15 and is held thereto for rotaticn by means of a screw 16 threaded into the lower end of the rod. the screw 16 having a screw driver kerf 17.

The inventirn comprises a plug 18 adapted to be threaded into the upper end 9 of the passage 8 in the drill 1, under ci cumstances which willbe pointed out hereinafter, the plug 18 being provided with a screw driver kerf 19 which is accessible through the recess 10 in the drill rod 1. Upon the exterior surfaces cf the drill rod 1 and the drill 2, marks 20 are formed.

In practical operation, the plug 18 is threaded cut of the end 9 of the passage 8. Then a screw driver is applied to the kert 17 of the screw 16. the rod 11 being rotated, and the latter turning in the latch block 15. WVhen the rod 11 is rotated. the rod m ves upwardly into the position shown in Fig. 3, because the upper end 12 of the rod is threaded into the portion 9 of the passage 8. Ult mately. the l wer f ce of the latch block 15 i disposed flu h with the lower fa cc of the drill rod 1 as shown in Fig. 3 of the drawings. When the parts are thus arranged, the shank 3 of the drill 2 may be,

threaded into the recess 4--in the drill-rod 1. Relative rotation between the drill rod 1 and the drill 2 is continued until the marks 20-on the drill-and the drill red are lined up vertically. When the marks 20 are lined up vertically, the seat 6 in the drill 2 is lined up vertically with the opening 7 in the drill rod 1. Then, through the recess 10 in the drill red 1,a screw driver is applied to the kerf 14 of the rod 11 and the latter is moved downwardly, because it is threaded as shown at 12 into the part 9 of the passage 8. As the rod 11 moves downwardly,

it rotates in the latch bloclr15 and carries rod 11 to lock the same against rotation.

When the parts are disposed as above described, it will be obvious that relative rotary "movement to any appreciable extent between the drill red 1 and the drill '2 will be impossible. If desired, however, aslight relative rotation between the drill and the drill rcd may be brought about, sothat the marks 20 are disposed slightly out of the position of alinement shown in Fig. 1, the latch block 15 under such circumstances, being firmly gripped by the drill 2. v

The threaded plug 18, the red 11 and the latch block 15 ordinarilyare made out of brass or some similar metal which will not rust or deteriorate rapidly.

Having thus described the invention, what is claimed is I 1. In a device of the class described, a

drill and a drill holder having athreaded connection, the drill having a seat; a screw threaded into the drill holder and disposed longitudinally thereof; and a latch block in which the screw is journaled, the latch block being movable by the screw to engage with theseat.

"2. 1na device of the class described, a

drill and a drill holder having a threaded connection, the drill holderhavingaseat;

a screw threaded intothedrill holder and provided with means for engaglng the seat; and a second screw disposed coax ally with the 'firstspecified screw and threaded into;

the drill holder, the second screw being adapted to co-act with the first specified screw to prevent a rotation thereof. v

3. In a deviceof the class described, a

drill and a drill holder having-a threaded connection, the drill havinga seat, a primary screw disposed longitudinally ofthe drill holder and threaded thereinto; a latch block in which the screW' is journaled, the latch blockbelng movable under the action of the screw to engage with the seat; and a second screw disposed axially'with respect to the primary screw and threaded into the drill holder, the second screw being adapted.

to cooperate with the primary screw. to prevent a longitudinal movement thereof, and

to prevent a retraction of the latc h block' from the seat.

In testimony that I claim the foregoing as 7 my own, I'have hereto aflixed'my signature in the presence of twowitnesses. V g

, i HENRY ssRIrFIN. Witnesses:

EDWARD H. ALLEN, W. E. Moore.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). (1. i