US2538480A

US2538480A - Hacksaw frame

Info

Publication number: US2538480A
Application number: US554955A
Authority: US
Inventors: Sprague Clifford
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-09-20
Filing date: 1944-09-20
Publication date: 1951-01-16
Anticipated expiration: 1968-01-16

Description

C. SPRAGUE HACK SAW FRAME Jan. 16, 1951 Filed Sept. 20,'1944 NM mm Nw @n lll/lr6. 532

Patented Jan. 156, 1951 l 2953,48@

UNITED STAT-Es nffiirinvii# ogame?if:

` assenso? HACKSAW FRAME Clifford.Spraguemyvilmarr .Application september zogneiligsriai No.;554 i955 ,3.91am (e1-seen 1 2 :My.invention relates I.110haeksawrframes. and Eig. 5i isl ganenlarged sectional. View thereof .among the objects ofvmyinvention are: 'tklfJh- Tug i-,Figlia First, toprovide a. haeksaw frame whereinfzthe The hacksawefljelle iDClldES-a main st llltl 0f .spacing between the. hacksaw blade and back bar llztrxrlelfforni, which isattdiedlts'ir' @11d othe; frame may beereadilyand. quickly. Varied. f to ;.a ;handle frame-2. lhe handle 'frarneei'sf U- 'Secondgto prox/'idea hacksaw framewhich inshmdfinzirm. andpneleg. thereof isenca'sed in corporates novelend fittings for the vhaeksaw a moldedhandle.- The rnan` strut isfseeur'ed to t blade which areso arranged that evenwhen the v the ;c ross pertinIly andthe Iemabilig1 Q5 0f blade is loosened to permit adjustment of vits therhandle ame ljhelegifxtends,itgright angularrelation with :the frame-or-its spacefrorn` 10 .anglestothe ain strut. L theback bar,A the bladefcannotall out ofthe end .fllhegmaen str utvlreeives an adjustable strut fttngs; however,` at least.` one ofytheendfttngs S Whvchis -vshapedv onefile'gfitting wthin'the being adapted to move onto theback bar;of. .thev mainstrutvand--theothgl;legffdiSpOSed't fight :frame .to permit, ,when in..suchzpositiomready angles-,thereto ,'lh Qrnannerinwhioh thernain .nsertionor removal of the blade. 15;; Strutarld ad'j-ustabl y struts are'onrfleeted iseon- Third, to provide a hacksawfirarnemhiehtinventonal, and therefore not 'shownin 'detaillf' corporates a novel handle constructionawherein lfheflegs-,fandl talrrys.slide. IAr'ievrr1l )`er's and 9. y. the connectionbetween theihandle andrthe frame 'Ilm-slide members @$62.111 the fr lrrno bars'havis in alignment. with thehacksawbladathe hanirlgfsllansyerse; Slots M ;Whih reeive the ylegs 5 y dle being so arranged. thatit Amay beplaced in` meandri; lThe eXtrernities'otthe legs lrnaylbe'"upset Many angular relation with Athe `U -braeket.,which or staked aslindicated by^I II to retain the'slide joins the ends of the h acksaw blade. membersthereom The slide Inmbers' 8 and 9 Fourth, to provide. ..haeksaw .frame which.. by are :substantially: the; Same eJXefDt'.thatltheslide Areasonof the angulary and .spacing adjustment of ...member gwhiheitshthez; rearhlgifjs .lo'llger the biade andL angular adjustment of. thailandia. zsnthanthe slidememherfgand alsoits 'slot islo'neer permits .use of. the .hacksaw in awkwardplaces to permit limitedlongitudinal rnovernent relative Where aconventional.haksawcould'notiba-used. tQeiheoleg- @thumb SGI'GW vl2 VS hlfeldedvifrvlt With the4 aboveA and other.. object-,sin .viewcas thearear end -oithe slide'member Sand-entersthe mayappear hereinafter, reterencejs directed to s101310 tqengage the leg 5. Y

rtheaccompanying drawings, in which.: 30,. EachfslidelmQmbBIS, lfJruOVided With a Socket Fig. 1 is a vfragmentary sideelevational .View :i3 WhG1 1 `-.C1Ye5fa4 m |4- Thegrftm |4- is -of,the-:hacksaw lframe. showing by dotted linesian ...D lQVds-rd. .with a; heady l5. WhChiS held Within -.adjusted position `of the-.hacksaw blade, .anduby the SOCKET] I3 by a Sh01l1le1`--l6 4f01"1fndby.rolling Y. other dotted lines the. position ofone or theend in war-.dfthefmouthbf the 'socket i3. E acnhad ttings.v when removing or inserting. a hacksaw ,f. l5 f. ;S .(3.813dl-0160filinittdV axial .rnbveme-nt` in its 'blade sgevket I3.Y Slqts ell are provided: in the periphery Fig.- 2 vis an er1larged..f.ragmentary sectional Offah 11e-@ 1395- hQSSLSlQS 4.treppI'Cfelllli10- v View through 2-2 oil'igure lshowingtheecon- -C'llteilifogaplt- At. a. Suitable?. Point in the-,DB-

nection between one of the end fittings and-.the .;1". Dl.1I`Yc0f ,15h-f? '.Sietl la-Stake .la S .fQllled haoksaw blade, ano-illustratingme .manner in 40 .r=1ori dinean,iQQrMLPIQJQQQn adapted to ft ywhiel'iztheA blade is retainedand the manner. in any .^0f..?l1- S19t5y|tand PleYCIlt I "Qlifiiolfl Of the --Whicheit is inserted vor. removedowhentheiend Stem Hl The Stake engages the SlOS when the -.attingisinrheproperposition. head J5 .viS-mQvedg-.teward the s heulcler I6 and .Figure 2A is a sectional View through. .2A-. 2A idiseneages,thQ;,SlOtS.SQ:thatthastem VH lrriav be of Figure l showing in elevationone lof ,the .end 4.5.1IQP9GC1 Whenhe.hedfsfmOi/d Dt0,.} h-S9Cwkeb rttings on the strut of thehacksawiframein the Y positionassumed when. inserting or..removing a I'hteXeIldlndof 'eachstern `Iiliisgproviciled \.hacksaw blade, the hacksaw .blade .being shown *.Wt'ha 1.10.tch;| .9. C1117h1"i11 @1011 the longitudinal tilted about its longitudinalaxis for..this. puraXSz0ffthe S tem.; -The axial-end.oieachnotch I9 .pose f 50.;is.;undereutzasindieated.by 20. Qutwardlvfrom Fig. 3y isa transverse sectional .viewof thefend :.hesllndelllt' ..pirlyl .eXtendS into llhetspace Attingtaken through 3-.3 of Fig. 2. .formedabythe notch.V vlilach vpin 2l is. disposed Fig.l 4, is a fragmentary side elevational .View ...in. converging relationwith the slope ofthe unf 'ofoa modiedvform of. hacksaw..frame :wherein de.rcut2f5.Iv .ir f:thevhansie-isattachedvon anaxis aligningewith 55-vTbeanronortionssoi; the-notch J9,- undercut the hacksaw blade, 20, and the pin 2|, which together form a houle 3 element, are such that a conventional hacksaw blade B can only be inserted or removed when the plane of the hacksaw blade is in angular relation (approximately 45) with'the axis of the stem,

as shown in Figure 2A. However, this angularV relation can only be assumed when the slide member is on the strut 6 and its longitudinal axis is in substantial angula1` relation, that is, the angular position of the hacksaw blade shown by broken lines in Figure 1.

When the slide is on the leg 1 this necessary angular relation cannot be obtained and, hence,

even though the blade be loosened, it cannot fall free. Y

This is of primary practical importance for it enables one to adjust with ease the angular relation of the blade with respect to the hacksaw frame, or to move the slide members and blade along the legs and -1 for adjusting the spacial relation between the blade and the main strut l of the frame. Not only may the blade be moved in a parallel `plane,'but one slide may be moved further than the other to dispose the blade in angular relation with the main strut. This adjustment enables the hacksaw to be used in cramped quarters where a conventional hacksaw from the mandrel 34, and is provided with aseoond threaded portion 31 which receives a nut 38 for securing the stem to the ferrule 32. A handle 39 which may be formed of a molded plastic, is provided with a handle arm 40 of metal extending therefrom and provided with a tapered socket 4l which fits over the tapered mandrel- 34. The axial extremity of the handle arm 40 and a shoulder formed at the base of the tapered mandrel 34, may have complementary serrations #l2/so that when the handle arm is tted onto the mandrel it may be secured against rotation. A hole is provided axially through the handle arm 4B to receive the second threaded portion 31, and a knurled nut 43 is provided for adjustably securing the handle arm to the ferrule 32.

With this arrangement the handle, arm, and ierrule, maj,T be rotated bodily as a unit to draw the slide member 8 laterally across the leg of the U-rame until the blade is suftlciently tightened. Thereupon the knurled nut V43 may be loosened and the handle turned until in the desired angu- Vlar relation (normally in the planeof the could not be employed. By way of example, this adjustment of the haclrsaw blade enables the hacksaw to be used for the purpose of severing boiler tubes where the clearance between the tubes is less than the extended distance between the haclisaw blade and the back of the hacksaw. The hacksaw may be slipped into place with the blade, for example, in its dotted line position, and as the tube is cut the hacksaw blade may be adjusted outwardly.

When the slides are loosened and the slide 9 'is in the dotted line position shown in Figure l;

that is the position shown in Figure 2A, the blade Y may be rotated or twisted about its longitudinal axis while Ythe other end remains attached to the stem of the'slide 8. This movement about Vthe longitudinal axis of the hacksaw blade may be continued until the blade is tilted sufficiently vto vclear the pin 2i as shownbest in Figure 2A..

Once this end of the blade is unhooked from slide 9 the blade may be tilted about either its longitudinal axis or transverse axis until free to disengage the stem of the slide 8. Thus, to

install the blade in the hacksaw frame the bladeL is rst secured to the stem of the s lide'S and then to the stem of the slide 9, and to remove the blade, the steps are reversed. Y l

It should be observed that when the slide 3 is loosened sufficiently, its stem may move into theV slide to disengage stake lug I8 and slots I1, thereby to permit free rotation of the hacksaw blade. The connection between the blade and theY stem Y i4 is sufficiently loose that the longitudinal axes wherein a special handle adapted for use in conjunction with the slide member E `is employed. In this construction a single piece'U-frame 3l may be substituted for the main and adjustable struts i and 6. A tapered ferrule 32 provided with a socket 33 iits over the slide member 8.

The extended end of the errule forms-a tapered mandrel 313 which receives a stem 35.V The stem 35 includes a threaded portion 36 which extends into the soclret 33 and is threaded into the end of the slide member Vi3 to engage a leg of the 'y lil-frame V3 l. The stemh also extends outwardly ci the U-frame.

The extremity of the ferrule is adapted to bear against the edge of the leg 5 `on opposite sides of the shank to restrain the handle from rotation once the blade is tightened.

Many other embodiments of this invention may be resorted to without departing from the spirit of the invention.

I claim:

1. A hacksawconstruction for a hacksaw blade having perforated ends and comprising: a pair of slides, a hook member carried by each slide, each hook member having a longitudinal axis and including Va laterally extending pin and a shoulder confronting said pin, the face of said shoulder and the axis of said pin converging, whereby the perforated end of a hacksaw blade must be disposed at a substantial angle relative Vto the hook member to fit over said pin and under said shoulder; a frame for said slides including a track for one of said slides, said track having a bend whereby the hook member of said one slide may be moved between a'position in which the longitudinal axesfof saidV hook members are coaxial, thereby to limit angular movement of said haclsaw blade and retain said haclfzsaw blade thereon, and a position in which thelongitudinal axes of said hook members are angularly related thereby to permit connection and disconnection between said hacksaw blade and saidhook mem# bers.

2. A hacksaw construction for a hacksaw blade havingV perforated ends and. comprising: a pair of slides, a hook member carried by each slide, each hook member having a longitudinal axis and including 4a laterally extending pin and a shoulder confronting said pinthe face of said shoulder and the axis .of said pin converging, whereby the perforated end of a hacksaw blade must be disposed at a substantial angle relative to the hook member to t over said pin and under said shoulder; a frame for said slides including a track for one of said slides, said track having a bend whereby the hook member of said one slide may be'moved between a position in of said hacksaw blade and retain said hacksaw blade thereon, and a position in which the longitudinal axes of said hook members are angularly related thereby to permit connection and disconnection between said hacksaw blade and each hook member having a longitudinal axis and including a laterally extending pin and a shoulder confronting said pin, the face of said shoulder and the axis of Vsaid pin converging, whereby the perforated end of a hacksaw blade must be disposed at a substantial angle relative tothe hook member to t over said pin and under said shoulder; a frame for said slides including a track for one of said slides, said tracll` having a bend whereby the hook member of said one slide may be moved between a position in which the longitudinal axes of said hook members are coaxial, thereby to limit angular movement of said hacksaw blade and retain said hacksaw blade thereon, and a position in which the longitudinal axes of said hook members are `angularly related thereby to permit connection and disconnection between said hacksaw blade and said hook members; a swivel connection between each hook member and its slide permitting rotation of said hook member and limited axial movement of said hook member relative to its slide; and interlocking elements incorporating each hook member and its slide for positioning said hook member in predetermined angular relation with said slide.

CLIFFORD SPRAGUE.

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

UNITED STATES PATENTS Number Name Date 878,160 Stebbins Feb. 4, 1908 903,495 Parsons Nov. 10, 1908 1,190,477 Sprague July 11, ,'1916 1,413,348 Parsley Apr. 18, 1923 1,595,035 Troutman Aug. 3, 1926 '1,695,231 Egan Dec. 11, 1928 2,085,667 Macomber June 29, 1937