US2612784A - Portable filing, milling, and grinding machine - Google Patents

Description

Oct. 7, 1952 PATZAK I PORTABLE FILING, MILLING, AND GRINDING MACHINE Filed Dec. 18, 1947 2 SHEETSSHEET l I v I Oct. 7, 1952 K. PATZAK 2,612,784

PORTABLE FILING, MILLING, AND GRINDING MACHINE Filed D80. 18, 1947 I 2 SHEETS-SHEET 2 //IIIIIIIIIIIIIIIIIIIIIIJ71 \MIIIIIIIIIIIIHH llllllllllH Illll lll l l lllllll IG'. 2

Patented Oct. 7, 1952 Y I t .'-,2,612,784 V Y I Pdit'iingm FILINGiMILLING, AND

a GRINDING MACHINE ILKarelLBatzak )Prague,@Czechoslovakia. -Apfilica'tion December 18,1947; SerialNiiL 792,534

Ju -Czechoslovakia September- 9, 1946 I isecmnignubnc tawlsso, August S, 1946 .Batentoexpires Septemberl9,w1-966 .7

The present invention :relates to a portable -filing, milling and grinding machine "with teen- 1. tinuo'us "revolution I control and with two trans- I nissio n gears for attaining the highest possible revolutions required for grinding bygmeans. of

The hitherto known macliines' of thistype 20 "fpr'esent' a :number of 'rdrawbacks. Their range :rof revolutions' is comparatively "sm'allfi'an'd does not at all' suit the i'reciuirements'fof"machining and finishing various'materials. A stepwise variability of "revolutions'is"prejudiciousffor'the "use of all-sizes of rotary tools. In"some"cases the transmissions: invoivegearwheels"alwaysisub- I j'ectedto rapid wear and'cau'sing" noisyfrunning. 'Moreovenall familiar designsof machines-"of this typeareunshielded. According --to the present invention allthe above mentioned drawbacks -will" be-eliminated by providing between the driving-shaftand rthe first working shaft? a transmissionwith continutous control, the most advantageous--adjustment of the working revolutions-ofthe machine-being "achieved in" function of -the indications of.- a-scale including the kinds ofmaterials underrtreatment *and the respective diameters-"of therotary'm'w chining tools. Consequently, the workerrh'aving "in frontothimithe material to*be'-worl ed,ihas only'to' read off on"'the"sca1e" thenecessary tool "diameter for carrying out the finishing operation'and by placing the indicator enthdrespective division of the scale adjusts automatically the machine'to the most advantageous revolutions'owingto the arrangement of a continuous control between the driving shaft and the first jworking shaft. I I

The accompanying drawinglillustrates, merely 'fby waywof example, an embodiment of the maflchine according to thefpresentinvention. r Fig. lushowingaperspective view of ,the..generalarrangement of the machine,

Fig. 2 showing a front view of "the rna'chine The portable filing, milling and attached toIthe shaft l l ofthefina'chinef a 55 shielded by the cover I 5.

(on. 74-'1'6) I turned by 90 and a cross section'o I-IinF ig.1,; i r

Fig, 3 showing a. longitudinal'slection son; line II--II inFig.2.I I chine according to the invention compris 'fiexible shafts, at the ends .of .lwhi'ch the tive rotary tools'are beingattached. flexible shaft, the so-calledfilingfshaft flexible shaft, the grinding shaft 5| 1a,:i1 nected to the shaft of the machinefiaiid" a third shaft, the high-speed fl xib e sh ife'zmzx i connected tothe'shaft20of theIinach 15 "The problemof continuousjrevo ut"; I

is solved by'the provision "of a jfr'ictiojn "mission gear between the driving shaft of he electric motor of-"the machine' and th 'Zfiling) wo'rking shaft turning' within revolutionran'g'e. 'IhiS tranSni'ifsSicin is "by' twd'bevel rollers "4 and 10. The dr: 4 is "directly connected to the shaft 3 'electricimotor 2 mounte'd in the' i'n chin :transm-ission' ofithe" rotaryiiforce is pe through TSP slide 1 wheel '16 vcoatedivwith'i a iiuober ring 5. .Saidwheel'iis freely *isu'pporte moveable screw nut 'l" threaded -iand secured against-rotation; v-wire r @01' the '2 like. :By: :turnin esaidnut"1thusvchanging:tinraecontinuouspsman- :ner the revolutionsrofsaidishatt J-| wi:ththread- I ing i 3- -whereon-: the zfiexiblelshait :tool. is .wattache'd the rangalof Elia ltween-.1000. and 38000 revs. -lper nii ut Further revolutions,, i. e. "up" 1r minute forthenso-called grinding; attached to the'threa'ding offshaft '1" tained through :a transmission": 40'endless flat 'fabric-"belt' "ll" from unto' the pulley I8! 'ThI eI fiat-belt stretched by aspiral spring 9; I

In'the sameinanner'tlie fui' the tr 'for the highjspeed flexible sham: Uni-attached? to .thlthlfid'diligSOfi said shatti2 Iris designed. iSaid yflexible shaft is fprov'ided "for? thessmall'estw grinding discs from55 mm.- up to ,20 mm". in l-dia -;and '3turning-:atbetween:24,000;andgi8 0 Said highspeedr shaits l1 a n't in needlesbearings, ball bearing or lthese-=-transmission gears a e? ois'elessaa di he entireconstruction is. shieldedjthronghont The t-main portion ofl themachineh lenc sed a --two-I-part.-casing v. the; transrriissionQg'ear On said casing l a switch 2] is provided with the inlet cable 22. The whole machine may rest on either a low or a high stand (see Fig. 1) and is turnable.

Fig. :1 illustrates also the arrangement of a handy scale 24 with indicator 29 extending inside the casing up to said slidable nut 1 of said transmission friction gear 6. Said scale includes all the types of material for the machining of which this machine is intended and in conformity with the properties of these materials, such as their strength, hardness etc. the required diameters of the respective rotary tools for machining said materials are calculated. These data are grouped in the individual lines of said table scale so that the worker by placing correspondingly the indicator may, without any necessity of calculating adjust through said wheel 9 the most advantageous revolutions, if

he knows the material being machined and the diameter of the required rotary tool.

Iclaim: 1. A portable drive unit for drivingshafts bearing tools for making an article, comprising in combination, a casing; an electric motor arranged in said casing and having a motor shaft arranged in said casing; a bevelled roller secured to said motor shaft; a first tool bearing shaft rotatably arranged in said casing parallel to said motor shaft; a bevelled roller secured to said first tool bearing shaft and having a slope being equal and opposite to the slope of said bevelled roller secured to said motor shaft so as to leave a space having-a constant width between said bevelled rollers; a bolt supported by said casing in the central line of the space between said bevelled -,rollers; a slide wheel arranged on said bolt and -.engaging said bevelled rollers so as to transfer ..-the rotation from said motor shaft to said first tool bearing shaft; means for shifting said slide wheel along said bolt so as to vary the gear ratio between said motor shaft and said first tool bearing shaft; a second tool bearing shaft ro- ,tatably arranged in said casing; and means arranged in said casing for driving said second tool bearing shaft by said first tool bearing shaft at a constant high speed ratio.

, Aportable drive unit for driving shafts bearing tools for making an article, comprising in combination, a casing; an electric motor ar- 1' ranged in said casing and having a motor shaft arranged in said casing; a bevelled roller secured 'to said motor shaft; a first tool bearing shaft 1 rotatably arranged in said casing parallel to said motor shaft; a bevelled roller secured to said first toolbearing shaft and having a slope being equal and opposite to the slope of said bevelled roller secured to said motor shaft so as to leave a spacehaving a constant width between said bevelled rollers; a bolt supported by said casing in the central line of the space between said bevelled rollers; a slide wheel arranged on said bolt and engaging said bevelled rollers so as to transfer the rotationv from said motor shaft to said first tool bearing shaft; means for shifting said slide wheelalong said bolt so as to vary the gear ratio between said motor shaft and said first tool'bearing shaft; a second tool bearing shaft rotatably, arranged in said casing; means arranged in said casing for driving said second tool bearing shaft by said first tool bearing shaft at a constant high speed ratio; a third tool bearing shaft rotatably arranged in said casing; and

means arranged in said casing for driving said in combination, a casing; an electric motor arranged in said casing and having a motor shaft arranged in said casing; a bevelled roller secured to said motor shaft; a first tool bearing shaft rotatably arranged in said casing parallel to said motor shaft; a bevelled roller secured to said first tool bearing shaft and having a slope being equal and opposite to the slope of said bevelled roller secured to said motor shaft so as to leave a space having a, constant width between said bevelled rollers; a bolt supported by said casing in the central line of the space between said bevelled rollers; a screw nut arranged on said bolt; means for preventing said screw nut from rotating with respect to said casing and allowing said screw nut to rotate with respect to said bolt; a slide wheel rotatably arranged on the perimeter of said screw nut and engaging said bevelled rollers so as to transfer the rotation from said motor shaft to said first tool bearing shaft; means for shifting said slide wheel along said bolt so as to vary the gear ratio between said motor shaft and said first tool bearing shaft; a second tool bearing shaft rotatably arranged in said casing; and means arranged in said casing for driving said second tool bearing shaft by said first tool bearing shaft at a constant high speed ratio.

' 4. A portable drive unit for driving shafts tosaid motor shaft; a first tool bearing shaft rotatably arranged in said casing parallel to said motor shaft; a bevelled roller secured to said first tool bearing shaft and having a slope being equal and opposite to the slope of said bevelled roller secured to said motor shaft so as to leave a space 'having a constant width between said bevelled rollers; a bolt supported by said casing in the central line of the space between said bevelled rollers; a screw nut arranged on said bolt; means for preventing said screw nut from rotating with respect to said casing and allowing said screw nut to rotate with respect to said bolt; a slide wheel rotatably arranged on the perimeter of said screw nut and engaging said bevelled rollers so as to transfer the rotation from said motor shaft to said first tool bearing shaft: means for rotating said bolt with respect to said casin so as to shift said slide wheel along said bolt so as to vary the gear ratio between said motor shaft and said first tool bearing shaft; a secondtool bearing shaft rotatably arranged in said casing: and means arran ed in said casing for driving said second tool bearing shaft by said first tool bearing shaft at a constant high speed ratio.

5. A portable drive unit for driving shafts bearing tools for making an article, comprising in combination, a casing: an electric motor arran ed in said casing and having a motor shaft arranged in said casing; a bevelled roller secured to said motor shaft; a first tool bearing shaft rotatably arranged in said casing parallel to said motor shaft; a bevelled roller secured to said first tool bearing shaft and having a slope being canal and op osite to the slope of said bevelled roller secured to said motor shaft so as to leave a space having a constant width between said bevelled rollers; a bolt supported by said casing in the central line of the space between said bevelled rollers; a screw nut arranged on said bolt; means for preventing said screw nut from rotating with respect to said casing and allowing said screw nut to rotate with respect to said bolt; a slide wheel rotatably arranged on the perimeter of said screw nut and engaging said bevelled rollers so as to transfer the rotation from said motor shaft to said first tool bearing shaft; means for rotating said bolt with respect to said casing so as to'shift said slide wheel along said bolt so as to vary the gear ratio between said motor shaft and said first tool bearing shaft; an indicator rigidly connected to said screw nut and having an extension; a scale plate arranged outside said casing for cooperation with said extension of said indicator so as to permit an ad-- ju-stment of said screw nut with respect to said bolt thereby adjusting the gear ratio between said motor shaft and said first tool bearing shaft; a second tool bearing shaft rotatably arranged in said casing; and means arranged in said-casing for driving said second tool bearing shaft by said first tool bearing shaft at a constant high speed ratio.

6. A portable drive unit for driving shafts hearing tools for making an article, comprising in combination, a casing; an electric motor arranged in said casing and having a motor shaft arranged in said casing; a bevelled roller secured to said respect to said casing and allowing said screw nut to rotate with respect to said bolt; a slide wheel rotatably arranged on the perimeter of said screw nut and engaging said bevelled rollers so as to transfer the rotation from said motor shaft to said first tool bearing shaft; means for rotating saidibolt with respect to said casing so as to shift'said slide wheel along said bolt so as to vary the-gear ratio between said motor shaft and said first tool bearing shaft; an indicator rigidly connected to said screw nut and having an extension; a scale plate arranged outside said casing for cooperation with said extension of said indicator so as to permit an adjustment of said screw nut with respect to said bolt thereby adjusting the gear ratio between said motor shaft and said first tool bearing shaft; a second tool bearing shaft rotatably arranged in said casing; means arranged in said casing for driving said second tool bearing shaft by said first tool hearing shaft at a constant high speed ratio; a third tool bearing shaft rotatably arranged in said casing; and .means arranged in said casing for driving said third tool bearing shaft by said second tool bearing shaft at a constant high speed ratio.

KAREL PATZAK.

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

UNITED STATES PATENTS Number Name Date 125,809 Grout Apr. 16, 1872 730,930 Lambert June 16, 1903 776,455 Christie Nov. 29, 1904 1,055,476 Krayer Mar. 11, 1913 2,089,003 Sack Aug. 3, 1937 2,360,181 Waltz Oct. 10, 1944 2,419,639 Groene Apr. 29, 1947

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