US1130770A

US1130770A - Ratchet-drill.

Info

Publication number: US1130770A
Application number: US80940713A
Authority: US
Inventors: Osborne Smedstad
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-12-29
Filing date: 1913-12-29
Publication date: 1915-03-09
Anticipated expiration: 1932-03-09

Description

0. SMBDSTAD.

BATGHET DRILL.

APPLICATION FILED DEC. 29, 1913,

Patented Mar. 9, 1915.

2 SHEETS-SHEET 1.

gwue wboz.

0 Smealsiad E NORRIS PETERS CO., PHOTKFLITHOH WASHINGTVN. D, C.

O. SMEDSTAD.

I RATGHET DRILL.

APPLICATION FILED 1920.29, 1913.

Patented Mar. 9, 1915 2 suEms-snnnw a.

04. FHOTO-LITHG WASHING TON. D, C.

OSBORNE SMEDSTAD, OF PORTLAND, OREGON.

RATCHET-DRILL.

; Specification of LettersPatent.

Patented Mar.9,19%15.

Application filed. December 29, 1913. Serial No. 809,407.

To all whom it may concern I Be it known that I, OsBoRN'E ,SMnos'rAD, a subject of the King of Norway,'residing at Portland, in the county of Multomah and State of Oregon, have invented certain new and useful Improvements in Ratchet-Drills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. i

Myinvention relates to new and useful improvements in portable drills of thattype known as ratchet and resides in the provision of drill which may be readily and effectually operated by hand and which is portable.

An important object of my invention is to provide a drill such as above described that is adapted to be operated by a lever or handle the movement of which in both directions serves to rotate the drilling member in one direction in an even and expeditious manner.

Another important object of my invention is to provide a ratchet drill of the character described which may be operated in an extremely expeditious manner owing to the arrangement of the gears that are arranged in a way so as to provide the desired operation.

Another important object of the invention is to provide a ratchet drill such as above described that is provided with novel supporting means which is capable of adjustment to the desired'degree and which is simple as to construction and reliable in its operation. I

Another important object of-the invention is to provide a drill such as above described which employs novel ratchet means in connection with a drill chuck and spindle'the latter of which is provided with a novel form of bearing means that is adjustable to facilitate the use of the drill in connection with railways and other places where the drill is to be interposed between two members one of which is to be drilled.

A still further object of my invention is to provide a ratchet as of the character described which is extremely simple as to construction and number of parts, is compara tively light and may be easily carried from place to place, durable, and which is also cheap to manufacture. a l '7 They above and additional objects are accomplished by such means as are illustrated in the accompanying drawings, described in the following specification and then more particularly pointed out in the claims which are appended hereto and form a part ofthis application.

With reference to the drawings, wherein I have illustrated thepreferred embodiment of my invention as it is reduced'to practice, and throughout the several views of which similar reference numerals designate corresponding parts: Figure l is a side elevation of my ratchet drill as it would appear in assembled position and. when operated between two surfaces also showingthe adjustable spindle bearing and drill supporting means in section, Fig. 2 is a vertical sectional view taken on line 2-2 of Fig. 1 illustrating in detail the arrangement of the ratchet gearing forming a part of the invention, Fig. 3 is a transverse sectional .view taken on line 8-3 of Fig.1 illustrating in detail the operating lever and ratchet gearing, Fig. 4 1s a transverse sectional view taken on line 4+ of Fig. 1 illustrating in detail the auxiliary lever that is operatively connected with thedrill chuck and spindle and main operating lever, Fig. 5 is a cross sectional view taken on line 5 5 of Fig. 2 illustrating one of the supporting means for the ratchet gearing attached to the main supporting standard, Fig. 6 is a detail plan view of a slightly modified form of ratchet mechanism, and Fig. 7 is a view of another modified form of ratchet mechanism Referring now more particularly to the drawings forming a part of this specification and in which like characters ofreferences are employed to designate correspond: ing parts, the numeral 1 designates as an entirety a supporting standard upon which the drilling mechanism to be later described is mounted or attached. This supporting standard 1 consists of a bar having squared and threaded

ends

2 and 3 similar in con-' struction. The threaded

square portionsv

2 and 3 of the supporting standard 1 terminate in spaced relation to the center of the standard in enlarged annular bearings or flanges 4 for a purpose whichwill be later more fully described. Mounted uponea'ch of the

portions

2 and 3 of the bar 1 is a square internally screw threaded collar 5 which rests when in assembled position and when the

portions

2 and 3 are extended their full distance upon the flanges 4 on the supseen that the bearing member (inlay be adj'usted relative to the supporting standard 1 by rotation of the squared sleeveh.

A pair of spaced supporting

arms

7 and 8 each of which is provided at its" ends with bearings-9' and 10' are secured to the standard 1. These supporting arms"? and'8 are disp esed laterally with respect to the supporting standard 1 in spaced superp'osed'relation to each other and are detachable with respect to' thesupporting standard 1. The .tearinge d of each of the

members

7 and ,8 is provided by enlarging the arms as at 11 pointsli'ghtlyfspaced from theends'and longitudinally slotting the adjacent end as at.12.', An opening is formed through the enlarged portion 11 to accommodate the portion of the supporting. standard 1 between thefianges 4 thereon and an adj usjting screw leis inserted tran'sversely'through the bifurcated ends" formed by the slot 12' for the obvious purpose of tighteningthe supporting arms upon the supporting standard 1. Rotatably mounted within the'bearings- 9 of the

arms

7 and 8 is a spindle 14 to one terminalof which'is secured in any suitable "m nners suitable chuck orjtool holder 15 adapted to receive a suitable tool'16 as vshoiflvni'njFig. 1.'

The terminal of'the spindle 14 farthest removed; frm the end upon which the chuck is secured is screw threaded as at 17 and provided with a flange 18 spaced from the end thereof and at the juncture of the screwthreads. A hexagonal collar having an internally screw threaded bore designated 19 is adjustably mounted: upon the screw threaded portion 17 of the spindle 14 and is provided at its outer end with a pointed bearing member 20' which is preferably formed integral with the sleeve 19. It will thus be seen that the drilling tool16 may be efiiectually operated when positioned for use between two supporting surfaces such as railway rails or the like owing to they arrangement of the supporting members 6 that are adjustable and the adjustable pointed bearing 20" upon the spindle 14 which insure positivecentering. of the tool. The device is adapted tobe used in connection with I a device commonly known in machine shop language as an old man,

The ratchet mechanism for operating the spindle and drill 2 consists of a large ratchet gear whee-121 that is loosely mountedon the spindle 14 between the bearings of the arms 7 and 8.= annular recess 22 is formed in one face of the ratchet 21 and; accommodates a ratchet 23 which is keyed upon the spindle 14 and isof smaller diameter than the recess-22 to provide a spacebetween its periphery and the wall of the recess. Secured to the wall of the recess 22 isa spring metal hook member 24' that is arranged to engage the. teeth of the ratchet wheel 23 upon the rotation of the large ratchet 21 in one direction. This member f24'isconstructed' after themanner of a leaf spring and provided at its free terminal with a hook which engagesthe teeth ofthe 7 Loosely mounted upon the supporting standard 1 between the

arms

7 and 8 and bearingupon the bearing. 10'of the arm 8is an operating lever designated as an entirety by the'numeral 25. This lever 25" is journaled intermediate its ends and'the end adjacent the supporting; standard" 1 is enlarged to provide a toothed segment 26 that is adapted for meshing engagement with the large ratchet gear wheel 21 to'c'ause the'sam'e to be rotated and subsequently rotate the spindle 14., It will thus be seen that upon the operation of'the lever 25, its movement 4 in one direction will cause arotary movement of the spindle-14' and subsequently the drill tool 1 6 after the manner hereinbefore described.

Asa meansfor providing. for the rotation of the spindle 14 upon the movement of the lever25 in both directions, there has been" provided an' auxiliary lever 27 This lever 27 is'enlargied at a point'approxim'ately centrally of its endsand the enlarged portion thereof isprOvidedwith a segmental slot or opening 28 adapted to receive the portion of the supporting standard 1 that is disposed between the

arms

7 and 8 so asto permit free movement of the lever 27 relative to the supporting standard 1. One end of this-lever 27 is slidably'connectedwith the main operating lever 25 by means of a pin and slot connection 28 the obvious purpose of which is to permit the operation of the leversfl relative to each other upon the oscillation of the main leverinboth directions} The other end of the lever 27 is loosely journaled upon thes'pindle 14 and consists of a pair of superposed spaced supporting arms 29' formed by longitudinally of the arms 7 respectively. A spring metal hook pawl 31 is secured at one end adjacent the inner terminal of the a m 29 against the ratchet wheel 21 and bearing 9 adapted for engagement at its other end with the ratchet 30 upon the rotation of the lever 25 in one direction, that is'reverse to that direction which operates the ratchet wheel 21. The pawl 31 is similar to the pawl 24 hereinbefore described and it will be plainly seen that when the operating lever 25 is grasped by the handle portion thereof and oscillated that a continuous rotary movement is imparted the spindle l4 and drill tool 16.

When the drill is to be operated between two supporting surfaces the desired adjust ment of the member 6 by the supporting standard 1 may be had by meansof the sleeve 5 screw threaded upon the portion 2 of the supporting standard 1. The bearing point for the spindle 14 may be adjusted as desired so that the true centering of the tool 16 is provided as well as the easy operation thereof.

Referring particularly to Fig. 6 in which there has been illustrated a modified form of the ratchet wheel 21 and cooperating parts, the numeral 32 designates av ratchet wheel that is provided with an annular recess 33 upon one side thereof. A fiat ring 34: is mounted upon the spindle 35 so that its outer edge is spaced from the side wall of therecess 33. A plurality of inwardly extending slots in opposed relation and radially about the center of the ring 34 are formed in the ring 34: and adapted to receive spring pressed plungers 36 that are provided with beveled or chamfered faces 37 and act as would a pawl so as to engage teeth 38 upon the side wall of the recess 33. As the ring 34 is keyed upon the spindle 35 and the ratchet 32 is loosely mounted it will be seen that a ready rotation of the spindle 35 is provided upon the rotation of the ratchet 32 in one direction. The above de scribed form of ratchet mechanism may be used effectually with my ratchet drill as hereinbefore described.

Referring more particularly to Fig. wherein there has been illustrated another modified form of my ratchet mechanism'the numeral 39 designates a gear wheel. Keyed upon the spindle and disposed adjacent the gear 39 is a ratchet 40 of smaller diameterv than the gear 39. A spring pressed pawl 41 is suitably connected with the face of the gear 39 adjacent to which the member 40 is mounted and is adapted to operate similar to the pawl 2 L.

It will be seen with reference to the fore going description and drawings that there has been provided a ratchet drill which will f1, accomplish in a reliable and expeditious manner all the functions hereinbefore recited and which owing to its construction and arrangement of parts may be readily assembled or disassembled for the purpose of renewingparts which may have become worn or repair thereto.

1n reduction to practice, I have found that the form of my invention, illustrated in the preferred embodiment, is the most eiiicient and practical; yet realizing that the conditions concurrent with the adoption of my device will necessarily vary, I desire to emphasize the fact that various minor changes in details of construction, proportion and arrangement of parts may be resorted to, when required, within the scope of the appended claims without sacrificing any of the advantages of my invention.

What is claimed is 1.. A ratchet drill including a standard, adjustable bearing means at each end of said standard, a spindle, a tool chuck on one end of said spindle, means for supporting the spindle in spaced parallel relation to the standard, adjustable bearing means at the other end of said spindle, a lever loosely mounted upon said standard and means mounted upon the spindle and standard for rotating the spindle in one direction upon the movement of said lever in both directions.

2. A ratchet drill including a standard, adjustable bearing means at each end of the standard, a spindle, a tool chuck at one end of the spindle, adjustable bearing means at the other end of said spindle, means for supporting the spindle in spaced parallel relation to the standard and means mounted upon the spindle and standard for rotating the spindle.

3. A ratchet drill comprising a standard, collars threaded upon each end of the standards, a bearing plate swiveled upon the outer end of each of the collars, a spindle, a tool chuck connected with the spindle at one end, a bearing adjustable upon the other end of the spindle, means for operatively connecting the supporting standard with the spindle, a lever loosely mounted upon the supporting standard and adapted for oscillatory movement and means for rotating the spindle in one direction upon the movement of the lever in both directions. In testimony whereof I aiiix my signature n presence of two witnesses.

OSBORNE SMEDSTAD.

Witnesses:

JOHN A. WALTER,

EMIL P. SLOVARP.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.