US1034825A - Track-drill. - Google Patents

Description

A. R. PAULUS.

TRACK DRILL.

APPLIoATIoN FILED snPT.1,19os.

1,034,825. i Patented Aug. 6,1912.

3 SHEETS-SHEET 1.

, l Imm f' TRACK Diam.. APYLIOATION FILED SEPT. 7, 1905.

Patented Aug. 6, 1912.

3 4SHBHTB--SHIIIIT 2.

` 'f gam,

A. R. PAULUS.

'ruck 1mm.. APPLIoATIox rI'Lnn ssn. 1, nos.

1,034,825.' mma Aug. ma

3 SHEETS-BIBB! l( ffw/ IME@ v 'Lv-N provided. if desired, upon the other end ofv vided with rearwardly extending portionsv 34 that are connected by pivot bolts 35 (see Fig. 6) to the side bars 10 of the base. A Ipair of hooks 36 for engaging the rail, are connected by a cross bar 37andare ivotally connected at their rear ends by bo ts 38 to the rearwardly extending portions 34 of the uprights 37. The upright frame and hooks -are adapted to swing rearwardly upon their pivots and 38 to permit the passage `of trains without removing the drill from position. The lower ends of the side bars 27 are provided with shoulders 39 that rest upon the side bars 10 of the base when the upright frame is in operative position. This tramevis also securely held in its upright position by .a pair of jointed braces 40. the sections of which are pivoted to the side bars 27 of the upright frame and to the rear ends of the side bars-10 of the base.

The construction of parts thus far described is similar to those of the prior patlented construction an `need not be more fully set forth here. In the prior construction however, the speed of the drill stock could not be varied relatively to that of the driving crank shaft. In drilling holes of f different sizes, itl is desirable that the speed and power applied should be varied; for example, for drilling large holes a .low speed .and high power is desirable while for drilling small holes, the drill should be driven at high speed and low power. For this purpose, I provide a set of interchangeable gears (see Figs. 2, 3 and 4) comprising the beveled gears 41 and 42, which are of the same size, and a third smaller beveled gear 43. These gears are removably held in place upon the upper end ofthe counter-shaft 26 and upon the driving or crank shaft 31 by keys 44 having oH-set portions 45 on their ends by which they may be readily removed from position with a vscrew driver, or other suitable tool.`

Then the drill is to be driven at medium speed and with medium power for drilling medium sized holes, the beveled' gears 41 and 42 that are of the same size, are fixed" respectively to. the drive shaft and to the upper end of the counter-shaft 26, as shown in F12. For driving the drill with low powerand high speed, the small gear 43 is fixed upon the upper end of the countershaft 26 and one of the large gears 41 is fixed to the drive shaft (see Fig. 3). For low speed and high power for drilling large holes, the large gear 41 is fixed to the counter-shaft 26 and the same gear 43 to the driving or crank shaft 31, as shown in Fig. 4. In makingI the change from one' setof gears to another, the keys 44 are removed tio loosen the gears4l and 43 and the crank shaft 31 may then be withdrawn end-wise and the gears easily removed. The desired set is then placed in position and the drive shaft 31 thrust end-wise back into place and the keys inserted to rigidly connect the gears to the driving and counter-shafts. Where gears 4l and 42 of equal size are employed, they abut in operative position against the bosses 30 and 32 as shown. Then the small gear 43 is fixed to the end of the countershaft, it abuts against the boss 30, as shown in Fig. 3, then to bring the large gear 41 in proper relation to the small gear, a washer 46 is interposed between the large gear 41 and the boss W'hen the small gear 43 is mounted on the drive shaft (see Fig. 4) it abuts in operative position against the boss 32 and the washer 46 is interposed between the boss 30 andV the large gear 41, so as to bring the latter in proper relation with the small gear. By thus providing three interchangeable gears and the interchangeable washer 46, the connecting gearing may be readilyarranged to drive the drill atl three different speeds and with three different powers.

With a machine of this sort, it is usual to drill a large number of holes of the same size so that the interchanging of the gea-rs, while readily accomplished, need not be made except at. infrequent intervals.

The hub of the beveled gear 24 (see Figs. t "1 and 2) is provided with an eccentric 47 that is arranged to engage an arm 48 on a rock shaft 49. The latter is journaled in the end bar 11 and in the inner cross bar 14. A spring 50 (see Fig. 6) is coiled aboutI the shaft 49 and is secured at one end tothe shaft and at its other end to one of the side bars 10. This spring holds the arm 48 into engagement with the operating eccentric 47. The rear end of the rock shaft 49 is provided with a bent arm 51 that carries the operating lpawl or pawls for driving the feed nut 20.

Three different feeds are preferably employed in accordance with the speed Aat which the drill stock is driven. For this purpose, the nut 20 is preferably provided withthree setsl of ratchet teeth 52 of different sizes. If desired, three separate ratchet nuts may be employed, butl they shouldbe connected to-rotate together and preferably they are all formed in one piece, as shown. The arm 51 on the rock-shaft.. 49 carries three pawls 53 that are swiveled upon the horizontal portion of lthe arm 51. and held in place thereon by a nut 54. These pawls are of different lengths and arranged tocooperate with the three lsetsfof ratchet teeth 52, the longest pawl being arranged to engage the smallest ratchet andthe shortest..

ratchet.

In operation, one of the feedpawls will held againei long-fitta th ting a he thrown into engaginient while tivo oi' the. pan are oi t wat. a "hovn drill ia il L n ai nie;

feed. 'With the lon apt i mverot' the drillatoelt the largeat iatrhet and itapaivl are employed for etterting! a relative low tend, and for niedinni speed and, :not uni feed, the intermediate ratrhet and paal are need. Ein-ing the operation o: 'whine in drilling a hole, the lern :www i is held against revolution hy means ot a` dog 55 that if; arranged to engage a longitudinal kevway 5G in the meren', Dog is pivoted lietween parallel lugsl or ahutrnenta 5T on'tlie rear Creer: liar l and hoera 2:2, and in itl ilprightportion shown in luga. t? end ot' the dog engages the key-way 56 to hold the screw against rotation, and Stated, this is the position in which the dog ie plat-ed during the drilling operation. 1When the dog' Shifted to horifontal posh tion .shown in ltig. 7,it ia thrown ont. of engagement with the sereiv and ite: other eno is arranged to engage one ot'a series of notches 5S termed in the edge ot the disk orhoss 59 on the face of the rairhet nut 2t), ao that, in this poaition of the dog, the ratrhet nut will loe held againat revolution.'

the

A@ Shown in Fig, 7, the tatie of the ratrhet not having the notrhed dial; 59 is re-eeseed. hut this ia not esaential ai: the notched diszk may.. if desired, project bevond the fatte of the nut. l:"Vhen the nut titl is held against rewdution liv the dog 55, the sere-vv l? may he turned to quickly advance or retrart the drill to and *from the rail hy means ot' a :mall rranlt hai'nlle tilt that is preferably reil'iov'-, alilv fitted livr-r the mtiaref'l end portion (El of the www', lt will lie eeen that the dog 35 torn. a simple eontrivaiwe by whirl; either the fee-1l aerea' or not nare he held asiziinfst rettili than for the drilling operation,

and 5, one l and silly advancing and retraeting i rail, lint the doo i oioj; one oiA tia-ae 3.1; van he ,v .nr-'t revolution so that 'there no dangri of breaking anyy of the 'parte of the inaehiize thi-r1., the oi'irraton ot the driving or eranlt sha lit.

lt is/ohviona that.numerous changea niav he iliade in the detalla o1" struetnre without departure from the eeeentialsof the invern tion as set i'ifrih in the appended claims.

llaving fleafrihed niv invention, what l iflaiin ie nen and delire to sentire hy liiettera llatent, if-"- l. ln itx/fia the drill ath and gearing f f aid #hai ad Steele, ot atta-fl .fa rf heil im. inrit nl. ion and swiveled to ,sani einen., a not. on said arrew ino vein ent. a nel i.

. i writting orante-allait,

having a ,plurality of ratehetsl of different antes, a plurality of pavvls shiftable-into and onty of engagement with their respective ratehete, and means driven from said crankaha'tt. for actuating said p'awls, substantially deerrihed.

2. in track drills, the Combination with the drill atoek and crank-shatt, of a feed srreiv held against rotation and swiveled'to Said atoelt. a nut on said screw held against longitndinal movement and having a pluraL ityY of ratrhets of ditferent Sizes, a plurality ot paivle for said ratehets, and. a pa-Wl actnator driven from said crank shaft, .said paWlS being pivotally mounted upon said actuator' to shift into and outv of 'engagement with their respective ratehets, substantially dest-.ribed 3. ln track drills. the combination with the drill stock', of a feed screw held againsty longitudinal rotation and Swiveled to Said steelt, a. nut on saidserew held against longitudinal movement and having a plural-ity of ratehetsnf different sizes, a roel( Shaft, a earn on said drill stoel; for operating said rock shaft, an arm on said Shaft and a pluralitvv ot parvis pivotally mounted on said arnito .shift yinto and out of engagement with their respet'tive ratchets, substantially a5 described., y

4. ln track drills., the combination wit-l1 a drill stock, ofa feed arrevi' .swiveled to l@aid drill stonk, a nut on said feed screw, means ktor positively locking either said nut or Said aerea* against rotation and separate actuat-r ing devices for positively rotating Said. nut and said screw, suhatantially as described.

5. in trark drills` the f folnliination with a drill Storti. ot' a teedscrew ewiveled thereto, a nut on aaid teed screw, a Common locking device tor aaid nut and ,said Screw arranged in one poaitiirn to positively loelt one of said parte againt rotation and leaving the other ot' said part` tree to rotate and means for roniting the unlocked one of Said parts, subatantially described.

(i. ln ti'aek drills, the combination with a drill stock and operating meana therefor, of a feed sri-ew siviveled to Said stock, a nut thereon, a pivoted dog for lotlting either 115 said, screw or :said nut against rotation and means tor rinating the. unlorlted part and to etlieet the quick or slow feed ot' said drill ltorle Suhatantially as described.

'.7. ln track drlllS, the eon'ihination with a 120 pawl arranged to engage. either said liev- 125 way or said notehed disk to lock either said Screw or said nist against rotation, and moana for rotating the unhazlwd part, Substantially as deseri ,ed.

8i ln trank drills. the combination with a 130 f {mw} auf?. ratchetmechansm for actuating said nut and an operating Yank handle for g said Screw, substammly as drsrxbed.

AARN R. PAUL 3S.

d'l sh .k e si Opm-ating Imam hervf r of a edfairev; svveied'to sfxii stof sufi 'nav-f ing a, ongitrfdal key-Way, a nut am Said screw having' :L notched disk 01; shouder, a l pivoted dog aange to engage either sad 'Wnesseot l LALLMN PREN'HCE, i

key-Way ur said notched disk tc lock either HARRY L. CLAPP.

:said screw or gad put against rotation, a

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