US1421928A - Drill - Google Patents

Description

J. c} FITZGERALD.

DRILL.

APPLICATION FILED SEPT. 9,}920.

1 421,92 I Patented July 4,1922.

JEREMIAH C. FITZGERALD, OF KILBOURN, WISCONSIN.

DRILL.

Specification of Letters Patent.

Patented July 4, 1922.

Application filed September 9, 1920. Serial No. 409,117.

T 0 all whom it may concern:

Be it known that I, JEREMIAH C. F1Tz- GERALD, a citizen ofthe UnitedStates, residing at Kilbourn, in the county of Columbia and State of Wisconsin, have invented certain new and useful Improvements in a Drill, of which the following is a specification.

This invention relates to improvements in that type of drills commonly called post drills and it consists in certain peculiarities of the construction, novel arrangement, combination and operation of the various parts thereof, as will be hereinafter more fully set forth and specifically claimed.

One of the objects of the invention is to provide a manually operable drill which is adapted for use on a stationary mount, such as a post, in a manner somewhat similar to the ordinary post drills heretofore in com men use and for like purposes, and besides, shall be capable of use as a portable drill and for drilling holes in articles or parts of machinery, in which, on account of their size, shape or fixed nature, drillings or holes at the desired positions or points therein can not be made by the ordinary post drills.

Another and important object of the invention is to provide a drill in which the mechanism for feeding or controlling the feed of the drill-bit is carried by the crank employed 7 to rotate the latter, and which mechanism can be operated so as to advance or retract the drill-bit by the hand used for turning said cran'k, thus permitting the other hand of the operator to be employed for holding and positioning the work or article being drilled, or for positioning the drill with respect to a large or fixed article, and obviating the necessity of stopping the rotation of the drill-bit, as is the case when the ordinary drill feeding mechanism is employed. Still another object is to furnish a supporting frame of the device which shall be of such construction, arrangement and operation of its parts as to afford great strength, durabihty, ease of assemblage and disassemblage of its parts and which can be readily mounted on a suitable support.

Other objects and advantages of the invention will be disclosed in the following description and explanation.

In the accompanying drawing, which serves to illustrate an embodiment of the invent1on Fig. 1 is a view partly in side elevation and partly in section of a drill constructed according to my improvements, showing it mounted on a suitable support and the parts thereof in position ready for use.

Fig. 2 is a plan sectional View taken on line 22 of Fig. 1 looking in the direction indicated by the arrows.

Fig. 3 is a similar view taken on line 3-3 of Fig. 1, and

Fig. 4; is a view in side elevation of the drill illustrating its construction and application when utilized for drilling holes in a cylinder or other large object or article.

Like numerals of reference refer to corresponding parts throughout the different views of the drawings.

The reference numeral 7 designates the drill-shaft-carrying-member or body which as shown is substantially S-shaped when viewed from the side and by preference, is made of channeled material, or of metal substantially U-shaped in' cross-section. The end portions 8 and 9 of the member 7 are located parallel with one another while the intervening portion of the body or member 7 is slightly inclined as shown, and presents its channeled portion downwardly or towards the drill-bit, thus affording a smooth rounded portion on its upper or closed surface of convenient size and form to be grasped by one hand of the operator when the. drill is to be used in its portable form. The member 7 with its extensions 8 and 9 forms a part of the supporting frame of the device, and as shown in Figs. land .3 of the drawing, is located in the upper portion of a channeled or crosssectionally U-shaped member or bar 10 which in turn is fitted at its ends in cross sectionally U-shaped brackets 11 each of which is substantially horse-shoe shaped and may be fastened by means of bolts 12 to an upright support 13 such as a post.

The bar or member 10 is secured to the brackets 11 by means of bolts 14 one of which bolts is also utilized for securing the extension 8 of the member 7 to the upper portion of the bar or member 10. This bar is promeans of a vided in its portion adjacent the post 13 with a series of notches or openings 15 and arranged longitudinally with respect to the bar and are employed for the purpose of en gaging the free end of a brace arm 16 which depends from a bracket 17 which loosely surrounds the bar lOc'and'is used for supporting the work of articles to be drilled when the device is employed as a post drill as shown in Fig. 1 of the drawing. The upper extension 9 ofthe member 7 may be provided with ahook 18,"for the purpose to be presently explained, and its upper end with an orificed. boss or collar 19 in which a shaft 20 is mountedfor rotation. This shaft'may be transverse opening, preferably in the form of an open ended slot which construction provides on the upper end of said shaft a air of spaced prongs 23 between which is loosely located one arm 24 of a double "bellcrank lever 25 the other arm 26 of'which engages an actuating element for said lever. Surrounding'the shaft 20 and resting on the upper portion of the member 7 or collar 19 thereof is one end of the crank 27 usedfor rotating the shaft 20 which carriesthe drillbit. This shaft is'not only rotatably mounted on themember 7,but is also mounted thereon for reciprocating movement.

Surrounding the'shaft 20 and resting at one of its ends on awasher 28 located on the upper surface of the crank 27 and also around the shaft 20 is one end of a spring 29, the other endofwhichrests against a washer 30'onthe upper'portion'ofthe shaft 20 which is held against outward displacement by pin 31 transversely located in the shaft 20 below the transverse opening in the upper part thereof. This arrangemerit, it is obvious, will permit of longitudinal movement of the shaft 20 but will prevent its -accidental dislocation. The crank 27 is by preference of the longitudinally split type, that is to say, it has between its end portions a pair of parallel members 32, see Fig. 2, between which the depending portion 33 of the lever 25 isfulcrum'edas at 34, for rocking movement between the members 32 of thecrank.

"However, I do not wish to be limited to the above mentioned construction of the crank as it isobviousthat said lever may be fulcrumed on a crank of a different construction. The outer or free end of the crank -2'7i'sjprovided with an upwardlyextended tubulanmember35 into which and through a suitable opening in the crank near its "free end is extended ascrew-threadedro'd 36 which is provided in its lower portion with a longitudinally extended opening 37 for the reception and operation of the arm 26 of the bell crank lever.

It will be understood that the threads of the rod 36 have no engagement with the opening in the crank or with the tubular member 35 but tliatits-upper portion does engage with its screw-threads an internally screw-threaded tube 38 which has mounted onits upper end rigidly therewith an enlargement or knob 39 used for turning'the tube 38 which acts as a nut on the rod 36, for the purpose of advancing or retracting said rod and thereby lowering or raising the arm 26 of the lever 25 which peratiomwhen'the rod 36 is raised, will cause pressure to "be exerted on the shaft 20, thereby feeding or advancing thedrill-bit. FBy' turning the knob 39 and tubular nut 38 int-he proper direction topermit the arm 26 of'the lever 25 to be lowered, it is obvious thatthe tension of thespring29 will exert itself against the washer30 on the shaft 20 and thus retract the latter.

Loosely surrounding the tubes 35and38 and resting on the upper surface of the free end of the crank 27 is a rotatable tube or handle member e0 by means of which the crank 27 may be rotated about its 'aXis'as desired without longitudinally actuating the drill-bit-carrying shaft.

However, when it is'desired to soactuate saidshaft,-all'that is necessary is for the operator to grasp the knob or enlargement 39 with the hand which turns the crank. and turn said knob in the proper direction.

In Fig. .4 of the drawing, I have shown the drill in its portable form and inthe act of being used for drillingholesina cylinder which is of such dimensions'that it could not be placed in positionforwdrillingon anordinary "post drill. In "this construction, the body or member 7 is detachedfromthe-supporting frameby removing the upper'bo'lt lei, whenit is obvious 'thatthe intervening portion ofthe member 7 between theextensions 8 and 9 thereof will afford a convenient hand grip or member bymeans of which the drill can be properly supported. "For the purpose of securing-the drillto the cylinder 4-1 or'other large object in which po-,

sition it is desiredto form'holesa chain 42 is connected at one of its ends by 'meansof a "bolt 43 extended through "a transverse opening i in the member .7 near the extension 9 thereof'and the other'en'd' of said chain after having been passeda-roun'd the cylinder or objectel, may be placed in engagement withthe hook 18 on the member 7 as is clearly shown in Fig. 4 of thedrawings, in'which positions it is manifest that the drill can be readily maintained and operated in substantially the same manner as above setforth. I Y

By my improvements, it is apparent that the lever 25 will so unite the crank 27 and the shaft 20 that the latter will be rotated in the rotation of said crank and that the feeding of said shaft and the bit which it carries can be performed by the use of the hand of the operate-r which is employed to turn the crank, thus leaving the other hand free for use as may be desired.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is- 1. A device of the class described, consisting of a shaft adapted to carry a drill-bit at one of its ends and mounted for rotary as well as reciprocatory movement, a crank mounted to turn said shaft, a connection uniting said shaft and crank, and independently operable threaded means carried by the crank and connected to said connection for controlling the reciprocatory movement of said shaft.

2. A device of the class described, consisting of a shaft adapted to carry a drill-bit at one of its ends and mounted for rotary as well as reciprocatory movement, a crank mounted to turn said shaft, a connection uniting said shaft and crank for unitary rotary movement, and threaded means carried by the crank and connected to said connection for controlling the reciprocatory movement of said shaft.

3. A device of the class described, consisting of a shaft adapted to carry a drill-bit at one of its ends and mounted for rotary as well as reciprocatory movement, a crank mounted to turn said shaft, a lever having oppositely extended arms fulcrumed on the controlling the reciprocatory movement of said shaft.

4. A device of the class described, consisting of a longitudinally spring actuated shaft adapted to carry a drill-bit at one of its ends and mounted for rotary as well as reciprocatory movement, a crank mounted to turn said shaft, a lever having oppositely extended arms fulcrumed on the crank and engaging said shaft with one of its arms, and means engaging the other arm of the said lever and mounted on the crank for controlling the reciprocatory movement of said shaft.

5. A device of the class described, consisting of a frame adapted to be secured to a wall or like support, a body detachably mounted on one end of said frame and laterally disposed with respect thereto, a shaft adapted to carry a drill bit at one of its ends mounted on the outer end of said body for rotary as well as reciprocatory movement, a crank mounted to turn said shaft, a lever having oppositely extended arms fulcrumed on the crank and engaging said shaft with one of its arms, and means engaging the other arm of said lever and mounted on the crank for controlling the reciprocatory movement of said shaft.

Signed at Kilbourn, in the county of Columbia, and State of Wisconsin, this, the 4th day of September, 1920.

JEREMIAH G. FITZGERALD.

Images