US627847A

US627847A - Drill.

Info

Publication number: US627847A
Application number: US69454898A
Authority: US
Inventors: Lafayette Durkee
Original assignee: Individual
Current assignee: Individual
Priority date: 1898-10-25
Filing date: 1898-10-25
Publication date: 1899-06-27
Anticipated expiration: 1916-06-27

Description

No. 627,847. 7 Patented lune 27, I899. L. DURKEE.

DRILL.

(Applicaltion filed Oct 25, 1898.) (No Model.)

2 sheets-Sheet I. R ill-IF; I?

l AI

I .51. WITNESSES ATTORNEYS.

Fatentedlune 27, I899. I

L.. DURKEE.

D R IL L (Application filed Out. 25, 1898.)

Shoet 2.

2 Sheefs (No Model.)

Alllll l1 WITNESSES ENTOB A 0a rs.

UNITED STATES PATENT OFFICE.

LAFAYETTE DURKEE, OF DENVER, COLORADO.

' ADRILL.

SPECIFICATION forming part of Letters Patent No. 627,847, dated June 27, 1899.

A Application filed October 25, 1898. Serial lie. 694,548. (No model.) I

To all whont it may concern:

-Be it known'that I, LAFAYETTE DURKEE, of Denver, in the county of Arapahoe and State of Colorado, have invented a new and Improved Drill, of which the following is a full, clear, and exact description.

My invention relates to an improvement in drills of the kind sometimes called jump drills or that class in which the reciprocating driving member has a spring connection with the drill-holder.

My invention consists of certain; novel means of connecting the driving mechanism with the drill, so that the reciprocation of the drill in one direction is made more rapid than in the other direction, and also in a compensating spring by which the weight of the drill holder is carried.

My invention further consists in the novel features hereinafter described and claimed. Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar characters of reference indicate corresponding parts in all the views.

Figurel is alongitudinal section of my device. Fig. 2 is a top plan view of the same. Fig. 3 is a sectional elevation of the same on the line 3 3 in Fig. 1; and Figs. 4, 5, 6, and 7 are sectional side elevations showing the different positions ofthe vibrating parts.

Within any suitable frame A is mounted the drill-holder B, which consists of a rod mounted so that it may reciprocate within the frame, and the holder is provided with any suitable means by which the drill may be securedthereto. Surrounding this drillholder are two spirally-coiled springs E and E, which at their opposite or outer ends bear against collars e and c, secured to the drillholder B. The collars e and c may be made adjustable upon the drill-holder, so as to vary the tension of the springs.

Between the adjacent or inner ends of the springs E or E and surrounding the drillholder B is a block F, provided with two oppositely-extending pins f, by which it is engaged and reciprocated, as hereinafter more fully described. Upon a shaft D, which lies ter of convenience in design, and it might as well be a straight lever. Each end of the lever D is provided with a slot, the slot cl embracing the pins f upon the block F and the slot d in the opposite end of the lever embracing a crank-pin g, which is carried upon a shaft G, suitably mounted in the frame; The end of the lever D which engages the block F is formed as a yoke, having an arm upon each side of the block F, as clearly shown in Fig. 3.

The crank-shaft G has a fly-wheel H secured to one or both ends thereof and is rotated by means of a pinion I, which is secured 'to the shaft and forms one member of a train of gears, which are mounted in the frame and consist of the gears J and L and the pinions K and I. The gear L is mounted upon ashaft L,whic11'is provided with cranks M, by which it may be turned by hand, or is otherwise connected with anysuitable motor. The motor, if its revolution is sufficiently rapid, may be directly connected with the shaft D., thus doing away with the speed-multiplying train of gears. The train of gears is journaled in a frame A, which is mounted to slide upon the frame A by means of the dovetail connection shown at a in Fig. or in any other equivalent manner, so that it may be moved toward and from the pivot of the lever D. By this means the stroke of the lever D and of the drill is varied as may seem best suited to the work being done. The adjustment is secured by a threaded bolt A which is held in the rear end of the frame-A and screws into a lug A? upon the sliding frame A, the bolt being provided with a hand-wheel or other convenient rotating means upon its outer end.

-A third spirally-coiled spring E is placed about the drill-holder B and bears at one end against a collar c and at its other end is adapted to engage the portion of the frame through which the drill-holder slides. The object of this latter spring is to act as a buffer to ease the extreme rearward throw of the drill-holder. The weight of the drill and the drill-rod is compensated for by a spring 0, which is secured at one end to the vibrating lever D and at its other end to any suitable support upon the frame A. This spring 0, when in the position shown in full lines in the drawings, serves to support the weight of the 4 drill and drill-holder, so that the springs E and- E are employed only to overcome the inertia of the parts. The spring 0 may be freed from the lever D when the drill is operating horizontally, or if the drill is Working upward instead of downward the spring may be detached from the lever at the point shown in the drawings and attached, as shown by dotted lines, when its action will be in an opposite direction. This reversibility of attachment of the spring 0 makes it possible to compensate for the weight of the reciprocating parts when the drill is used in any position. This spring 0 is adjustable and is to compensate for extra weight of steel as the drill is lengthened.

By reason of the crank-pin directly engaging the slot 61 in the lever the vibration of the lever is more rapid in one direction than in the other, as the crank-pin is near the pivot of the lever. This results in making the working length of the lever shorter during the downward stroke than during the return stroke, and in consequence makes the down-' ward or striking stroke a more rapid one than the return stroke. This causes a more effective application of the power and more rapid drilling than where both strokes are at the same speed.

The device as a whole is supported upon any of the usual drill-supporting devices and is fed toward and from the work in the usual way. These features, forming no part of my invention, are not herein shown and described.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A drill, comprising a drill-holder mounted to reciprocate, a pivoted lever connected with the drill-holder, a revolving shaft having a crank-pin connected with said lever to vibrate it, means for rotating the shaft, and a spring connecting the pivoted lever with a fixed support, whereby the weight of the drillholder may be compensated for, as the drill operates.

2. A drill, comprising a drill-holder mounted to reciprocate, a pivoted lever connected with the drill-holder, a revolving shaft having a crank-pin connected with said lever to vibrate it, means for rotating the shaft, and a spring having one end connected with a fixed support, and its other end adapted to be attached to the pivoted lever on either side of its pivot, whereby the weight of the drillholder may be compensated for as the drill Works either up or down.

3. A drill, comprising a drill-holder mounted to reciprocate and provided with pins, a pivoted lever having a slot in each end, the lower end of the lever being bifurcated to extend on each side of the holder and into the slot of which extend the pins of the drillholder, a revolving shaft, a crank-pin carried by the said shaft entering the slot in the upper end of the lever, and means for rotating said shaft, substantially as described.

4. A drill, comprising a drill-holder mounted to reciprocate, a pivoted lever having a slot in each end, a spring connecting the upper end of the lever with the frame of the drillholder, a crank-shaft, a crank-pin carried by said shaft and entering the upper slot in the lever, and means for rotating said shaft.

5. A drill, comprising a drill-holder mounted to reciprocate, a pivoted lever having a slot in each end, a crank-shaft, a crank-pin carried by said shaft and entering the upper slot in the lever, means for rotating said shaft, a block connected with the other end of the lever and surrounding the drill-holder, and a spring surrounding the drill-holder on each side of the block and connected at opposite ends with the block and holder.

6. A drill, comprising a drill-holder mounted to reciprocate, a pivoted lever having a slot in each end and connected at the upper end with the frame of the drill-holder, a crankshaft, having movable journals shiftable toward and from the pivot of the lever,a crankpin' carried by said shaft and entering the upper slot in the lever, means for rotating said shaft, and a spring connecting the pivoted lever with a fixed support, whereby the weight of the drill-holder may be compensated for as the drill operates. I

7. A drill, comprising a drill-holder mount ed to reciprocate, a pivoted lever connected with the drill-holder to reciprocate it, a revolving shaft having a crank-pin connected with said lever to vibrate it, means for varying the point of connection with the lever to vary the stroke, means for rotating the shaft,

and a spring connected with a vibrating member and a fixed support, whereby the weight of the drill-holder may be compensated for, as the drill operates.

8. A drill, comprisingaframe, adrill-holder mounted to reciprocate within the frame, a

pivoted and spring-pressed lever mounted in the frame and having a slot in one end and connected at the other end with the drillholder, a slide mounted on the frame to move toward and from the pivot of said lever, a revolving shaft journaled in said slide, a crankpin carried by said shaft and entering the slot in the lever, and means for rotating said shaft, substantially as described.

9. A drill, comprising a frame, a drill-holder mounted to reciprocate in the frame, a pivoted lever mounted in the frame and having a slot in one end, the other end of the lever being connected with the drill-holder, a slide mounted on the frame and adjustable toward and from the pivot of the said lever, a revolving shaft journaled in the slide and provided with a crank-pin Working in the slot of the lever, anda gearing for operating said shaft, said gearing being also mounted in the slide, substantially as described.

10. A drill, comprising a frame, a reciproeating drill-holder mounted in the frame and the upper end of the lever, and driving mecli provided with pins, a pivoted and spring-ae- 'anism also mounted in the slide, substan i6 tuated bell-crank lever mounted in the frame tially as described.

and having its ends slotted, the lower end be T w ing forked, a slide mounted on the frame and LAFAX ET DURKEE adjustable toward and from the pivot of the Witnesses:

lever, a shaft mounted in the slide and pro- AUGUSTUS TIT-US,

vided with a crank-pin working in the slot at CAMPBELL D. THUS;