US358755A - Device for drilling rai ls - Google Patents

Description

' (No ModeI.) 2 sheets-s116851.

A. L. STANFORD. DEVICE EOE DRILLING RAILS, GIEDEES, AND-TEE LIKE.

N0. 358,755. Patented Mar. l, 1887.

I-II mi UNITED PATENT trice.

ARTHUR L. STANFORD, OF VAUKEGAN, ILLINOIS.

SPECIFICATION forming part of Letters Patent No. 358,755, dated March 1, 18817.

Application led September 29, 1886. Serial No. 214,821. Y (No modell To aZZ whom it may concern:

Be it known that I, ARTHUR L. STANFORD, of Waukegan, in the county of Lake and State of Illinois, have invented certain new and useful Improvements in Hand Metal-Drills, of which the following is a full, clear, and eXact description.

My invention consists in a friction-clutch specially adapted for the purpose of actuating 1o a hand-drill in place of the usual ratchet.

It further consists in a new feeding device, and in the combination with a suitable frame, so as to adapt the drill for use indrilling rails, girders, and the like.

In the drawings, Figure l is a side View of the drill and a portion of the frame. Fig. 2 is a longitudinal section. Fig. 3 is a crossseotion on :v w, Fig. 2. Fig. 4 is a section on the line y y, Fig. 3. Fig. 5 is a cross-section on the line z z, Fig. 2. Fig. 6 is a perspective view of the drill and frame in position for drilling a rail.

A, Figs. l or 6, is a rectangular frame having hooked ends c a. These hooks should be of such a size that their ends may form a straight line with the drill-point. The frame A is provided with one or more lugs, K, Fig. l, by which it is support-ed on the tie, if used for rail-drilling, or any other suitable support, if usedfor drilling girders, Svc.` The frame A is so constructed in order Vthat a loose rail or girder may be drilled without being tilted, which cannot be done when the hooks fasten to the ange of the rail or girder, while the lugs k, by raising the back of the frame, insure the perpendicularity of the drill to the work, and these features are combined in a frame which passes underneath, rather than over, the rail when used in track-drilling, to permit the uninterrupted use ofthe track while the drill is attached thereto.

B is a case, preferably of hardened steel, having the beveled recesses b b, Fig. 3. Vithi n these recesses are contained the rolls I I, which act upon the cylindrical portion of the drillholder D. Contact between rolls I I, case B,

' and drill-carrier D is maintained by the spring J, which is made of ilat steel bent to the outline shown in Fig. 4, so as to present at least two points of contact both to the roll I and the case B, the purpose of this shape of spring being to insure the gripping action of the roller at both ends and throughout its length. Two or more spiral springs might be employed for each roll; but they cannot abut directly against the rolls without becoming misplaced. I have therefore constructed the recesses b b with the iiat grooved faces c c in .order to use a fiat spring.

The feeding device consists of the screw E, working inthe sleeve C, and carrying on its outer end the notched wheel G, secured by a left-hand screw or by a key, the handle H, and pivot-piece F. The face f, when used with the frame A as a rail or girder drill, or with an ordinary knee or frame used in miscellaneous drilling, said knee having a bearing-face of the proper width, has a slot cut across it to sustain it in proper position, or it may be simply roughened. Variation in `the relative positions of the pivot-piece F and the feed-screw is permitted by providing the end of the screw with a rounded bearing in the pivot-block, and making the hole g a Very loose fit. The rounded form of the end of feed-screw E makes it more durable than the usual pointed shape, and permits better lubrication. It is practicable to so shape the end of the feed-screw only when the permanently-attached pivotblock F is used, as the rounded end would slip out of the impromptu bearing usually made by a center punch in the supporting lknee or frame.

The handle H has an oblong hole, g, which permits the lug h, Fig. 5, to be thrown-in or out of engagement with the feed-wheel G.

To feed the drill it is only necessary to hold the feed-screw stationary, while the drill is revolved. This is accomplished by engaging the handle H with the feed-wheel G, the revolution of the former being prevented by the pivot-piece F. The device for feeding is thus powerful and positive in action, allowing the use of a coarse feedscrew. The feed-screw is threaded only on the head e, the body d being plain and fitting closely the opening in the sleeve G. Dirt is thus thoroughlycxcluded from the screw-thread, while the coarseness of the screw saves it from the danger of stripping, to which a iine thread would be liable if made so short.

I do not claim, broadly, the invention of a IOO roller friction-clutchV for rotating a drill, in

which a spring is used to maintain contact bctween the rollers and the other operative parts of the clutch; but I have found that in order 5 to maintain such contact, so as to produce an instantaneous grip and prevent all chance of slipping, both ends of the roller must be acted upon by the spring or springs having more than a single point of contact withv the roller and casing, and have so constructed my device as to meet this difficulty.

That the frame A passes under rather than over the rail, that the hooks a are opposed in a straight line to the drill-point, and that the I 5 rear of the frame is raised by the lugs 7c so that the drill is perpendicular to the rail or girder are, jointly, features of my invention.

1. In a hand-drill, the combination of the cylindrical portion of the drill-carrier D with the easing B, and rollers I I, held in contact with the casing and drill-carrier by springpressure applied at or near both extremities, substantially as and for the purpose set forth.

2. In a hand-drill, the feeding device consisting of a pivot-block, the "feed-wheel G, slotted handle H, and a feed-screw, substantantially as and for the purpose'set forth.

3. In a hand-drill, the pivot-block F, permanently attached to the feed-screw E, as and for the purpose set forth.

4. The hand-drilling apparatus, consisting of a frame, yfeeding device F, G, H, E, and C, and the rotative device D I I J J B, all combined substantially as described. 3 5

5. In combination With a hand-drill, the frame A, passing under the rail, having hooked ends a in line with the drill-point, and having supporting-lugs k, as and for the purpose de- ARTHUR L. STANFORD. Witnesses:

P. H. 'I'. MAsoN, J.'I. VERDER.

Y scribed.

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