US967552A

US967552A - Track-drill.

Info

Publication number: US967552A
Application number: US50438009A
Authority: US
Inventors: Charles K Pickles
Original assignee: SHEFFIELD CAR CO
Current assignee: SHEFFIELD CAR CO
Priority date: 1909-06-25
Filing date: 1909-06-25
Publication date: 1910-08-16
Anticipated expiration: 1927-08-16

Description

G. K. PIGKLES.

TRACK DRILL.

APPLICATION rum) 1mm 25, 1909.

Patented Aug. 16, 191 0.

2'SHEETS-BHEET 1.

g m mm Pm I .1 'E'F TTED STATES CHARLES K. IE'IGKLES, OF ST. LOUIS, MISEtOURI, ASSIGN'OR TO SHEFFIELD CAR COM- IPANY, OF THREE RIVERS, MICHIGAN.

TRACK-DRILL.

Specification of Letters Patent.

Patented Aug. 16, 1910.

To all whom it may concern:

Be it known that I, CHARLES K. PIoKLns, a citizen of the United States, residing at St. Louis, Missouri, have invented certain new and useful Improvements in Track-Drills, of which the following. is a specification.

This invention relates to improvements in track drills.

The main objects of this invention are: First, to provide in a track drill an improved feed mechanism. Second, to provide in a track drill an improved mechanism in which the feed is so connected that it is quite impossible for an unskilled or inexperienced workman to apply undue stress to the drill. Third, to provide an improved track drill which may be very quickly adjusted to or withdrawn from the work. Fourth, to provide an improved track drill which may be quickly knocked down or collapsed to permit the passing of trains.

Fifth, to provide an improved track drill which is very simple in construction, and, at the same time, rigid and durable.

Further objects, and objects relating to structural details, will definitely appear from the detailed descriptionto follow.

I accomplish the objects of my invention by the devices and means described in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure embodying the features of my invention is clearly illustrated in the accompanying drawing, forming a part of this specification, in which;

Figure 1 is a vertical section of a struc ture embodying the features of my invention, taken on a line corresponding to line 1-1 of Fig. 3. Fig. 2 is a rear elevation of my improved track drill with the cranks removed. Fig. 3 is a horizontal section, taken on a line correspondlng to llnes 3-3 of Figs. 1 and 2, portions of the rail-engaging hooks being broken away; Fig. 4 is a detail horizontal section taken on a line corresponding to lines 4--4 of Figs. 1 and 2. Fig. 5 is a detail section, taken on a line corresponding to line 55 of Fig. 4, showing details of the feed mechanism.

In the drawings, similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, I provide a horizontal frame or base which is preferably made up of plate-like side pieces 1 and cross

pieces

2 and 3, the rear cross piece 2 being preferably extended beyond the side pieces to .afiord a wide support and also so that the operators may stand upon the same when operating the drill to assist in holding it inplace. The base is rovided with ways 4, the ways being pre erably in the form of outturned flanges at the upper edges of the side plates 1. The carriage 5 is adapted to slide upon these ways and is provided with downwardly and' inwardly turned way-engaging members 6, there being preferably four of these, so that the carriage is held firmly upon the base, and, at the same time, travels freely thereon. The ways preferably extend to the end of the base, so that the parts are assembled by slipping the carriage thereon from the end, as will be obvious. The carriage is provided with a pair of horizontally-arranged bearings, as 7 and 8, for the drill spindle or holders. The forward bearing 7 is provided with a thrust bearing. member 10, preferably provided with a suitable ballrace for the bearing balls 11 interposed between it and the bearing member 12, which is secured to the drill spindle. This receives the thrust of the drill spindle and se cures the spindle against axial movement relative to the carriage.

The spindle is driven through the drivin shaft 18, which is provided with a beveled gear 14 on its lower end adapted to mesh with the gear 15 on the drill spindle. The driving shaft 13 is carried by the upright or standard 16, which is provided with suitable bearings as 17, 18 and 19 therefor. The standard 16 is provided with a horizontal foot or base portion 20, which is secured to the upwardly-projecting cars 21 at the rear of the carriage by means of the pivot pin 22. The carriage is also provided with a pair of upwardly-projecting cars 23 located at the front thereof, the ears being perforated to receive the retaining bolt or pin 24. The base 20 of the standard 1s provided with a forwardly-projecting arm 25 which is adapted to pass between these ears 23 and is perforated to receive the retaining pin 24 whereby the standard is secured to the base, and, at the same time, may be readily collapsed by removing the pin or bolt 24. The

crank shaft 26 is arranged transversely at the; upper end of the upright 16, and is geared to the driving shaft by means of suitable beveled gears, as 27.

On the rear end of the spindle, I arrange a feed worm 28. The feed worm 28 is revolubly mounted on the spindle, and. has a friction connection therewith. This friction connection preferably consists of the

washers

29 and 30 and the clamping nut 31, which is threaded upon the rear end of the spindle. The

washers

29 and 30 are arranged one at each side of the feed worm, the spindle being shouldered at 32 to receive the inner washer 30.

By adjusting the nut 31, the friction can be regulated so that the drill is efiectively driven, and, at the same time, when the strain thereon exceeds a predetermined point, the feed worm will slip so that the drill is not subjected to undue strain.

Co-aoting with the feed worm is a feed rack 33 which is mounted on the pivot rod 34, arranged through suitable cars 35 on the base, This rack is arranged so that it may be thrown into and out of engagement with the feed worm, as desired. When disengaged therefrom, the carriage can be advanced or retracted freely, as desired, to bring the drill up to or withdraw it from the work. The rack is under ordinary circumstances swung to its disengaging position by therearward turning of the spindle, but if it is desired to retain the same in driving engagement, this may be done by the operator placing his foot upon the rack or upon the hand-piece 36 on the end .of the pivot rod 34. The pivot ears 33 for the rack are preferably arranged to engage the frame and to serve as stops for limiting the downward movement of the rack, thus holding it in position, as is shown in Fig. 5. The railengaging hooks 37 are mounted on suitable outwardly-projecting journals 38 on the base. These hooks are adapted to be thrown over the rail, as 39, for holding the machine to its work.

My improved drill is very simple and durable in construction and quickly and easily operated. It may also be quickly collapsed or removed from the track to permit the passing of trains.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

I 1. In a structure of the class described, the combination with a base having horizontal ways'thereon; a carriage mounted on said ways; a spindle mounted on said carriage and secured against axial movement relative thereto; a feed worm mounted on said spindle and having a friction connection thereto; a .rack carried. by said base adapted to be thrown into and out of engagement with said worm; and driving means for said spindle carried by said carriage. Y

2. In a structure of the class described, the combination with a base having horizontal ways thereon; a carriage mounted on said ways; a spindle mounted on said carriage and secured against axial movement relative thereto; a feed worm on said spindle; a rack carried by said base adapted to be thrown into and out of engagement with said worm; and driving means for said spindle carried by said carriage.

3. In a structure of the class described, the combination with a frame; a spindle; a feed worm for said spindle having a frictional connection thereto; a feed rack arranged to be thrown into or out of engagement with said feed worm, adapted to be automatically disengaged 011 the rearward turning of the spindle; a stop for said rack when in its engaging position; and driving means for said spindle.

4C. In a structure of the class described, the combination with a frame; a spindle; a feed worm for said spindle; a feed rack arranged to be thrown into or out of engagement with said feed worm, adapted to be automatically disengaged on the rearward turning of the spindle; a stop for said rack when in its engaging position; and driving means for said spindle.

5. In a structure of the class described, the combination with a frame; a spindle; a feed worm for said spindle having a frictional connection thereto; a feed rack arranged to be thrown into or out of engagement with said feed worm; and driving means for said spindle.

6. In a structure of the class described, the combination with a frame; a spindle; a feed worm for said spindle; a feed rack arranged to be thrown into or out of engagement with said feed worm; and driving means for said spindle.

7. In a structure of the class described, the combination with a frame; a spindle; a feed worm for said spindle, having a frictional connection therewith; a pivoted feed rack; a hand piece for throwing said rack into or out of its engaging position; and driving means for said spindle.

8. In a structure of the class described,

the combination with a frame; a spindle; a

feed worm for said spindle; a pivoted feed rack; a hand piece for throwing sa1d rack into or out of its engaging position; and driving means for said splndle.

In witness whereof, I have hereunto set my hand and seal in the presence of two witnesses.

CHARLES K. PICKLES.