US1133243A - Gang-drill. - Google Patents

Description

Patented Mar. 23, 191.5.

2 SHEEI8-SHEET 1'1 HIS ATTBRNEY A. HILL. GANG DRILL.

APPLIGATIOW FILED-JAN 21, 1914 ow NN mmsmw;

A. HILL. GANG- DRILL 0 APPLICATION FILED JAN.Z1, 1914 Z SHEETS-SHEET 2;;

Patentefl Mar.- 23, 1915.

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vation of a gang.

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GANG-DRILL.

{Application filed January 21, 1914;. Serial No. 813,433. I

i a ail whom it may concern:

Beat known that l, AARON HILL, a citizen cf the United States, residing at Los An' geles, in the, county of Los Angeles and State of California, haveinvented new and useful Improvements in 'Gang Drills, of which the following is a specification.

lhis invention relates to gang drills or machines with a plurality of drills for simultaneous or related operation; and it has for its object to provide improved gang drill meehanism'which will be superior in point of relative simplicity and inexpensiveness-taken in connection with positiveness in operation, facility incontrol, speed of operation, and facility in applying and handling the work upon which the drills .With the above and other objects in view, the invention consists in the novel and useful provision, construction, combinationand relative arrangement and association of parts,,members and features, all as hereinafter described, shown in the drawings and finally pointed out in claims.

In the drawings: Figurel' isa front eledrill mechanism constructed and organized in accordance with the invention; Fig; the same; Fig. 3 is a transverse sectional view on the line 3.-3' of Fig. 4, looking in the direction of the arrows; Fig. 4 is a similar view taken upon. the line w*--m,-

Fig. 1, and looking in the direction .of the appended arrow; Fig. 5 is. a detail vertical transverse sectional View taken upon the line an -n Fig. 1, looking in the direction of the appended arrow; and Fig. 6 is a detail transverse sectional view taken on the line cu -m Fig. 1, and looking'in the direc-' Fig. 7 1S a detion of the appended arrow; tail horizontal transverse sectional view taken on the line w m", Fig. 2, and looking in the direction of the appended arrows; 8 is a fragmentary elevation showing closely? grouped relation between several of the spindles and sprockets and attendant features shown in Fig. 1. Figs. 3 to 6 inclusive are uponan enlarged scale.

Corresponding parts in all the figures are designated by .the same Referring with particularity to the drawings', A, A designate each a separate drill element all being shown as applied to work B such as a structural iron beam which 2 is a side elevation of' end supports reference characters.

. lipecifiea tion of Letters men. P te t d Mar. 23, 1 9915.

to receive a pluralitybf spaced holes, the

drills being shown as vertically arranged, and the work being mounted upon a movable support 0 slidable vertically at its ends by keepers 7 upon end frame uprights 8 which also support ahorizontal top frame member 9 carrying drill spindle bear ngs 10, one .foreach drill, each spindle'll being provided with, a sprocket 12, the said sprockets throughout the series of spindles being in stag cred relation so that an upper tier of sproc ets is, provided for engage-- ment by a link belt 13 passing about a drive sprocket ll at one end of the 'framemeniber 9 and about an idler 15 at the other end of the frame member '9; the. lower tier] of sprockets 12 being engaged-with alink belt lfiopei'ating around a drive sprocket 17 b,e-

neath the idler sprocket 1'5, and an idler sprocket 18 beneath the drive sprocket 14.

The idler sprocket 18 is loose upon-a vcrtical drive shaft 19 suitably journaled in the end of the frame member 9, the drive sprocket 14 being keyed tosaid shaft 19. The idler 15 is loose upon a 'driveshaft 20 to which is keyed the,drive sprocket 17.

Said drive shafts are adapted to be rotated-- by operating means D, jointly orv separately, such, means including main line shafts 21 and 22 at the opposite ends'of the machine, and journaled in -,brackets 23 and v frame member 9, such shafts having gears 25 and 26 meshing respectively with other gears 27 and 28 at the upper ends of the drive shafts 20 and 19. The

2% upon the .shafts 21 and 22 are provided with'loose pulleys 29 and 30 respectively with which cooperate friction clutches 31 and 32 splined or feathered to the shafts 21 and 22, such clutches being cross-connected by a link rod 33 joining the ,arms 34: and 35 of the clutches. i

-E designates operating means for the vertically movable work support C, the same including a drive shaft 3.6 journaled in the posed in positions to play upon rollers 38 mounted at theforward ends of pivotally operating elevated arms 39 which are adjustably connected .with and beneath the 105 work suppert C,

mensions and depth of drilling. One arm 1 8 and carrying cams 37 dis- 39, extendsrearwardly of its pivotal center 41, as at 12, and a rigid link rod 43 extends between such extension and. the shorter upon a short shaft 19; carrying a' sprocket 50 which through a link belt 51 rotates the operatingshaft 36 which carries loosely a sprocket wheel 52, the hub- 52 of which-is provided with a plurality of pivoted'dogs or pawls 53 adapted to 'co-act with teeth 54;

upon the inner surface of an annulus 55 ;keyed,-'as at 56, to the shaft'36. Each pawl.-

'. is. pressed toward engaging position by a compression spring 52 between the same and the hub of'the sprocket wheel. Hand i spokes57. radiate from the annulus 55, and

' by means of the samethe shaft 36 may be the machine.

given movement independently of the dogs and the sprocket wheel to position the work support as desiredthrough the aid of'the cams 37 prior to the setting up operation of VVhen the rollers ride over thenoses of thecams and the work support is thus permitted to drop the'link e3 and 'bell crank Mmove the-link rod 33 to disconnect the clutches 31 and 32 from the pulleys 29 and 30, terminating rotation of the drive shafts 20 and '19 and of' the sprocket 52, thus stopping operationofthe drills and of the drive shaft 36 which actuates the work-support. The bearings 10 of the drill spindles-11 are slidably applied 'to the top frame member 9 which they overlap at topand bottom, as at 10 ,,being for' that purpose supplied with a bored head through which pass-tie-bol'ts 10 secured at their rearward ends to back' plates, 10, whereby the bearings and-spindles and thus the entire drills A may be adjusted. lengthwise of the machine and endwise, of the;

frame member 9, and clamped in positions of adjustment by means of nuts 10 threaded into the forward ends of the tie-bolts 10 The frame member 9 preferably consists of an-I-beam within theforward channel of which is, disposed a relatively soft-retaining plate 58 between which and the web of the beam 9 are disposed a'metal back-plate 59 and spacing blocks or strips 60, said plates .and blocks beingstra pped to the beam web by tie-bolts '61 extending through said plates the respective series of sprockets 12 upon and adjusted to effectively hold the link belts or sprocket chains to the sprockets to c(1)1npensate for wear upon the retaining p ate. p

The link43 is preferably divided and provided with an elongated slot and pin connecting device whereby the bell crank 44 is thrown to throw out the clutches 31 and 32 when the arms 39 drop as permitted by the cams 37; this means of connection or lay permitting the work support and work 6 be elevated into position for commencement of operation, through the agency of the hand spokes 57, in the manner above described, without reversely throwing the bell crank 44 and seat-mgthe clutches 31 and 32, which latter operation is manually performed by the operator through the agency of the long arm of the bell crank 44..

The operationand method of use of the gang drill mechanism constituting the invention has beenset'forth during the recitation of the construction and combination and inter-relation of parts and features, and will be readily understood without further detailed description.

' The staggered arrangement of the sprocket Wheels 12 permits the same to over-lap so that a closer assemblage of the drills is permitted, and a lesser spacing of the resultant drill holes is permitted, thus permitting a wider range of operation than otherwise possible.

It will be understood from the above description that each piece of work plurally drilled as predetermined, and that upon the completion of the drill holes the work support drops with the work, the link 43 throw- Y ing out the clutches 31 and 32, terminating rotation of the operating shaft 36 androtation of .thedrill spindles 11, no further drilling operation being performed until a fresh piece of work has been brought into position and the clutches 31 and 32 are manually set as described.

Each drilling operation is thus independent of preceding andsucceeding operations, and unskilled labor may thus be employed in operating the machine without danger of injury to the person or work through uncontrolled operation.

' Having thus described my invention, I claim and desire'to secure by Letters Patent:

1. In a machine of the character disclosed. a drill, means for operating the same, a movable work support, means for operating the work support, andmeans operating automatically for jointly throwing out of opera ..tion the drilland the means as operating the work support;

'2. In a machine of the character disclosed,

a drill, means for operating the same, a mov- V able work, support, means for operating the so drills. d i r 6. In a machine of the character disclosed,

weenie m *"worhsupport, and means operating automatically fnr ointly throwing out of operation the drill and the means for operating the work support; means being provided lt for tinde;penden'tly operating the work suppor.

- 3. A gang drill machine, comprising a pluralityof separate drills arranged in a i a; plurality of'drills divided into two groups,

- and separate means for operating ,thedri-lls an of each group; said latter means including staggered sprockets the relative positions of which permit close assemblage of the drills.

In a machine of the character disclosed,

. a plurality of drills divided into two groups,

as asprocket wheel mounted on each of said drills, saids'procket wheels being arranged in staggered relation, and separate link beltsapplied to the'sprocket wheels of the respective drill groups for a support, a drill spindle mounted upon the support, asprocket wheel mounted onsaid drill spindle, a link belt applied to the sprocket wheel to operate the same, and

1 means for holding the link belt in its travel to the sprocket wheel-.

' 7. In amachine of the character disclosed,

a support, a drill spindle mounted upon the as support, a sprocket wheel mounted on said drill spindle, a link belt applied to the sprocket wheel to operate the same, and a recessed retaining, plate connectedwith the support and holding the link beltin its travel to the sprocket wheelymeans being provided for adjusting-the retaining plate with respect to the support.

8'. In a machine of the character disclosed, a support, a drill spindle adjustably mounted upon the support, a sprocket wheel mounted on said drill s indle, alinkbelt applied tothe sprocket w eel to operate the same, and a recessed retaining plate connected with thesupport and holding the'lin'k belt at in its .travelto the sprocket wheel.

, 9. In a machine of thecharacter disclosed, a frame provided with a transverse member and with upright members, a plurality of arparatedrills mounted upon the transverse ineiuber, a work support vertically movable nppn the upright members, a shaft beneath thaw ark support, a cam upon said shaft co;

a drive shaft, and a single the operation of the Witnesses:

operating with said work support, a vertical .swingin arm connected with the work sup port an ceoperatingwith said cam, means 6t for operating sai'd drills, means for operating said shaft, and means connected with said swinging arm for jointly throwing said drills and said shaft out of operation.

10.. In a machine of the character closed, a plurality of separate drills each having a drive sprocket, said drills being" divided into two groups, said sprockets being staggered, a drive shaft for each group,

, ofdrills, operative connections between the drills of each group and its respective drive: shaft, separate power applying shafts for the drive" shafts, separate. clutches for the power applyingshafts, and means operatively connected with both clutches for rendering operative or inoperative the power applying shafts. I 11. In a'machine of the character-disclosed, a plurality of separate drills, a sepa-. rate drive sprocket on each drill, said drills being divided into two groups, said sprockets beingstaggered to permit close assemblage of the drills, a drive shaft for each group of drills, operative connections between the drills of each group and its respectivedrive shaft, separate power'ap'plying shafts for the drive shafts, separate clutches for the power applyingshafts, and means operatively connected with both clutches for rendering operative or inoperative the power applying shafts; in combinaa tion with a movable work support, a drivesliaft for the work support, means for operating the drive shaft jointly with the drills,

cams upon' the drive shaft for raising and lowering the work support, and means actuated by said cams for throwing the drive shaft of the work support out of operation automatically and jointly with the power applying shafts.

12. A gang-drill-machine, comprising a plurality of separate drills arranged in a working series, a drive shaft, and a single link belt operatively applied to all of the .drills and to the drive shaft whereby, the

former may be operated'upon-rotation of the latter; each of said drills comprising a drill spindle provided with a drill proper and with a separatesprocket wheel .which coiiperates with said link belt; said drill spindles being relatively ad ustable to permit variations in the grouping of the same.

In testimony whereof, I have signed my j 1 nameto this specification in the presence of two subscribing witnesses; v

' AARON Amman I-I. Dimmers, W. F. Coon.

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