US2519542A

US2519542A - Sanding attachment for drill presses

Info

Publication number: US2519542A
Application number: US728798A
Authority: US
Inventors: Albert L Carey; Justin V Anslinger
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-02-15
Filing date: 1947-02-15
Publication date: 1950-08-22
Anticipated expiration: 1967-08-22

Description

Aug. 22, 1950 A. L. CAREY ET AL SANDING ATTACHMENT FOR DRILL PRESSES Filed Feb. 15, 1947 IN VEN TOR. A

IIll'llllllIllf' Patented Aug. 22, 1950 SANDING ATTACHMENT FOR DBIL PRESSES Albert L. Carey and Justin V. Anslinger, Kank'akce, 111."

Application February 15, 1947, Serial Nofvzsass 9 Claims. (01. 51-241) The present invention relates to an attach ment for a drill press whereby a drill press may be used as an oscillating spindle sander.

The main object of the invention is to provide a sander which may be secured to a drill press without the use of clamps, special attaching brackets, or other loose parts. More spe- '--cifically, it is an object of theinvention to provide a unitary sanding attachment for a drill press. I

A further object of the invention is to provide a sanding attachment which is so constructed that it may be mounted on a drill press by use of the ordinary depth gauge of the drill press.

Applicants have discovered that a sanding cylinder, specifically a cylinder formed of a helically wound sanding sheet if snugly fitted on a smooth faced rod secures itself against rela- "tive movement on the rod. and remains secured thereto against removal except against hand removal by a slow rotation and axial pull. It is therefore both an object and an advantage of the invention to provide a sanding drum consisting of a smooth faced rodand a sanding cylinder, preferably a helically wound sanding sheet, snugly fitted on the rod and solely secured thereby against movement relative to the rod during the use of the sanding drum.

. Other and further objects and advantages of through the drill press showing the manner of attachment thereon.

Fig. ,3 is a view in horizontal section taken along the line 3-3 of Fig. 2. H

Fig. 4 is a fragmentary view in vertical section taken along the line 4- -4 of Fig. 2.

As shown in the drawings, a sanding attach-- Ement embodying the invention is designed for attachment to a standard drill press 4 having the usual tool receiving rotary chuck 6, a depth gauge 8 which extends upwardly from a clamping collar I secured to the rotary and manually ,depressible spindle l2. The standard drill press =-is also provided with a work table 14 secured by a horizontal pivot to a clamping collar 16 on the .press column [8. This pivoting of. the table I4 :permits, as is well known, angular adjustment of, the table to differently inclined positions.

The attachment 2,,as best sho wnin Figs. 2 to 4,

preferably comprises a housing or support 20 including a casting having one open side wall which may be closed by a cover plate 22 suitably bolted or otherwise secured to the housing casting. The support or housing 20 may be formed with an integral laterally extending bracket portion or lug 24 drilled to provide a suitable aperture 26 to receive the free end of the depth gauge 8 when the same is inverted on the clamping collar ID as shown in the drawings. The support or housing is secured to the depth gauge or rod 8 by being clamped between the depth controlling and clamping

nuts

28 and 38 of the depth gauge.

The housing 20 is provided in its upper and lower ends with apertured

bosses

32 and 34 receiving bearings 36 in which is journaled a first spindle $8 receivable in the chuck 6 of the drill press for rotation thereby.

The housing is also provided in its upper and lower ends in spaced relation to the

bosses

32 and 34 with a second pair of aligned bosses and 42 apertured to receive similar bearings 44 in which is journal'ed a second spindle 46.

The spindle 46 is also journaled in a bearing 48 mounted in an aperture of a lug or bracket 50 extending inwardly from, and formed integrally with, a side wall of the housing 28. The spindle 45 is journaled in these bearings 44. and 48 for both rotary motion and vertical reciprocation.

The bearing 48 is mounted on a lug 553 in such .manner that its annular flange 52 rests thereon Iand forms a seat for a spur gear 54 splined to the spindle 46 by means of a pin or set screw 55 in the hub of the gear and received in the longi- -'t'udina1 key slot 58 of the spindle 46. The gear 54 meshes with and is driven by a like geartfl fixed to the spindle 38 as by the set screw 62. It will be evident that the spindle 38 causes rotation 'of the spindle 46 :by means of the gears 60 and 54.

Spindle 38 is also provided adjacent the lower end of thehousing with a worm gear 64 having a reduced hub portion 66 interfitted with a collar 88 having an enlarged axial opening at one end to receive the hub of the worm gear. The collar 68 and worm gear 64 are secured to the spindle 38 by a pin 10 fitted in transverse openwith the side wall of the housing 20. The worm wheel 12 is provided with an eccentric pin 18 received in a slot 8|! of a slotted yoke which consists of a block 82 loosely mounted on the spindle 46 and held against rotation with the spindle by engagement of the confronting faces of the block and worm Wheel. The yoke is held in fixed position against movement longitudinally of the spindle by means of clamping collars 84 pinned to the spindle 46.

It is to be noted that the wormwheel rotates about an axis which is normal to the axis of the spindle 46 and that the axis of rotationo'f the worm wheel is offset slightly from:aavertical plane which includes the axis of rotation of the spindle 48. This offsetting of the two axes .assures smooth reversal of the movement of the spindle 46 as it reaches its opposite extremes of reciprocating movement.

The spindle 46 extends below the housing '20 to receive a sanding drum preferably consisting of a smooth faced rod 88 detachably secured to the spindle as by setscrew 9H. Thesandingcyl- "inder 92, which preferably con-sists of a-'-standard 'helically wound sandingsheetforhred into a permanent cylinder, snuglyfits-'on-thesmooth faced *rod 88. Applicants have "discovered-that a san'ding cylinder snugly fitted n the rod-requires no other holding means and'that itwill not -come loose from the rod or moverelative to the rod during use, even though "a maximum of -pressure 'is exerted by the work again'st the *face of the sanding cylinder. The cylinder may, however, readily'be removed by manually turning the-cylinder'at a slow rate while holding the rod '88 stationary if at the same timeaslight axialpull *isexerted on the sanding cylinder.

To mount and "operate the attachment, the ;depth control gauge 8 whichnormally extends "upwardly from the ring lfl 'isreleasedther'efrom .and resecured thereto-in 'an'inverted position. ".The clamping nut 38 is then removed from'the "now lower end of the depth control gauge 8 and .thelug portion 24 of'the housing"2fl*passe'd :over the lower end of the'ro'd. The'clampinghut "3'0 is then tightened against thelower'surfaceof the lug'so that the housingis securedtothe rodbetween .thenuts 28 and 30. At the timethehousinglugis placed on the rod, the spindle fillisintroduced'into the 'chu'ckt'and the chuck tightene'd so that it isinproper*driving engagement with the spindle 38.

"Thelsandingdrumhaving been mounted'onthe "lower .end of the spindle '46, the 'Work tablelflis :adjusted to align one of theholesthereimtusuailly "the central hole 15, 'with the sanding drum so thatthe drum may pass .down .throug'hzthe work 'tta-ble to sand the wall 'or :ahole :or the internal or external edge surface of'work plac'ed "on the work table. 'It will of. coursefbeievident that the table l4.may be adjustecl'to anyidesired'incline'd ;position to sand an "inclined "edge or surface of 1 *the work.

As the chuck 6 of the drill press is'rotate'd, the spindle 38 is rotated thereby "to effect, "through the gears'60 and FL-simultaneous *rotation of the spindle-46 at substantially the'same speed. Simultaneously with its rotation, "the spindle 46 is causedto reciprocate vertically-at a much lower rate of speed. "reciprocation is effected by the worm gear (i l-"on thespindle 38 which rotates the worm wheel 12 and the Hatter by means of the eccentric :pm 1 8 recipro- -cates the slotted yoke 82 at a speed determined "iby the gear reduction afforde'dby'the worm gear Bland worm gear 12. Thus,"the-sanding drumis 4 simultaneously reciprocating vertically at a much lower speed to effect the desired sanding operation.

It will be evident that applicants have provided a relatively simple, inexpensive and rugged sanding attachment of the oscillating spindle type having the advantages and fulfilling the objects of invention heretofore set forth While certain specific "structures have been disclosed herein for the purposes of illustrating "our invention, it will be apparent that variations and changes may be made without departing from the spirit and scope of the appended claims.

What we claim is:

=1.*In combination with a drill press having a "chuck and a stationary rod suspendable from the frame of the .L-PJIGSS in close parallel relation to the chuck, an attachment comprising a unit including a housing having a bracket extending laterally therefrom for attachment to said rod, a fispindle mounted in "said :housing :exten'ding .tlrerea'bove ifor insertion 2111 said echu ck, 2a second spindle rotatably :reciprocably mounted :in said :housing :and extending therebelow, gear :means in saidhousing-interconnectingsaidshafts for .causing rotation -.of the second spindle on rotationxif the.zfirstspindlevand motion convert- Ring mechanismzmoun-ted :in said housing and interconnecting said :spindlessfor (causing reciproecation of the :SEGOIIdTSDiHdlBIIOIi rotationof the first spindle, and :a :rotatable :and .reciprocable Itookmcunted .on themortionlof the second spindleiprojecting beneath saidzhousing.

:2. .:A :drum fisander comprising :a smooth faced rrig'id rod :having .a uniform rand constant cross- .sectional area and ;-a sanding cylinder internally smooth-faced and snuglyfitting therodzand soleilyisecured thereby against: movement relative to theerod.

3. A drum :sander :comprising :a-smooth faced :rigidfrod-having aiconstant cross-sectional area and a rhelically'woundrcylinder of an abrasive .sheetrrhavinga smooth,.internal face and snugly :fitting themed and solely secured thereby against imovement relative atouthe :rod.

4..;Assandingnattachment for a drillpresshaving a chuck and-nagauge, said attachment comprising :a unit, including a vhousing having an integral laterally "extending lug apertured to receive the :depth gauge :wheminverted'lfor mounting of the housing thereonpafirstzspindle jourrnaled .in the housing and :extending from .the :upperrend thereof or.:inser.tion@in :the chuck of the drill press, a second spindle rctatablyand 'reciprocabl-y .mounted in tlre housing :and :projecting therebelow, :means interconnecting athe spindles for causing rotationzcf :the second-spindle on rotation of the first-spindle, -a dis'khaving an eccentric pin mountedin said 'hOLlSiIlg for rotation about an axis substantially normal to the axis of rotation :of the second "spindle, a slotted yoke 10Os1ym0llrit8d0nlthe second spin- 'dle and ..secured against relative movement in a "direction longitudinally thereof, the eccentric 'pin on the wheel interfitting 'in the slot of said yoke, and means interconnecting the first spindle and said wheel 'causing rotation of" the wheel on rota-- tion of the first spindle wherby the second spin- "dle :is simultaneously rotated and reciprocated, and a sanding-drum mountable on the portion of the secondspindle projecting below said housing.

5. A-sanding attachment'for a drill-press having a chuck and an invertible depth gauge, a housing having an integral, laterally *exten"ding caused to rotate at a 'relatively' high speed -while (lug apertured to *receive the depth gauge when inverted for mounting the housing on said gauge, a first spindle journaled in the housing and extending from the upper end thereof for insertion in the chuck of the drill press, a second spindle rotatably and reciprocably mounted in the housing and projecting from the lower end thereof to receive a sanding drum, intermeshing gears on the spindles within the housing and adjacent one end of the housing for causing rotation of said second spindle upon rotation of the first spindle, a worm wheel mounted in the housing adjacent the opposite end of the housing for rotation about an axis normal to the axis of the second spindle, a worm gear secured to the first spindle and meshing with the worm wheel, an eccentric pin on the worm wheel, a slotted yoke receiving the pin and loosely journaled on the second spindle but secured thereon against axial movement for causing reciprocation of the second spindle on driving of the worm wheel by the worm gear.

6. In combination with a drill press having a rotary chuck and a supporting frame, an attachthe first spindle, whereby the second spindle is ment comprising a support having an apertured bracket for ready attachment of said support to said frame and detachment of said support from said frame, a spindle rotatably mounted on said support and adapted to be inserted in said chuck for rotation thereby, a second spindle rotatably mounted adjacent to and parallel to said first spindle, said second spindle being reciprocably mounted on said support, means interconnecting said spindles whereby to cause rotation of said second spindle upon rotation of said first spindle, and means interconnecting said spindles 'whereby said second spindle is reciprocated in said support upon rotation of said first spindle.

7. In combination with a drill press having a rotary chuck and an invertible depth gauge, an attachment comprising a support apertured for attachment to the depth gauge when said gauge is inverted, a first spindle rotatably mounted on said support and projecting thereabove for insertion in said chuck to be rotated thereby, a second spindle rotatably and reciprocably mounted on said support adjacent to and parallel to said first spindle, said second spindle extending below said support and being adapted to receive a work tool, means interconnecting said spindles whereby said second spindle is rotated upon rotation of said first spindle, and means interconnecting said spindles whereby said second spindle is reciprocated within said support upon rotation of said first spindle.

8. An apparatus comprising a housing, a first spindle journalled in the housing and extending from the upper end thereof for attachment to a driving means, a second spindle rotatably and reciprocably mounted in the housing and prosimultaneously rotated and reciprocated.

9. A mechanism comprising a housing, a first spindle journalled in said housing and extending from the upper end thereof for attachment to a driving means, a second spindle rotatably and reciprocably mounted in said housing and projecting from the lower end thereof to receive a tool, intermeshing gears on the spindles within the housing and adjacent one end of the housing for causing rotation of said second spindle upon rotation of the first spindle, a worm wheel mounted in the housing adjacent the upper end of the housing for rotation about an axis normal to the axis of the second spindle, a worm gear secured to the first spindle and meshing with the worm wheel, an eccentric pin on the worm wheel, a slotted yoke receiving the pin and loosely journalled on the second spindle and secured thereon against axial movement for causing reciprocation of the second spindle on driving of the worm wheel by the worm gear.

ALBERT L. CAREY.

JUSTIN V. ANSIJNGERJ.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 154,756 Howe Sept. 8, 1874 170,178 Locke Nov. 23, 1875 238,284 Hapgood Mar. 1, 1881 295,900 Birkenhead Apr. 1, 1884 1,564,574 Hunt Dec. 8, 1925 1,881,839 Monson Oct. 11, 1932 1,929,274 Ellis .1. Oct. 3, 1933 2,043,017 Stubbs June 2, 1936 2,108,029 Connor Feb. 8, 1938 2,242,781 Gideon May 20, 1941 2,244,813 Tommerup June 10, 1941 2,402,946 Brown July 2, 1946 FOREIGN PATENTS Number Country Date 327,525 Germany Oct. 13, 1920