US2478347A - Combination handsaw and measuring tool - Google Patents

Description

ug. 9, 11949. R. R. WARRINGTON COMBINATION HANDSAW AND MEASURING TOOL Filed Aug. 8, 1947 2 Sheets-Sheet l l I l I l II l l a v ,ff u I ,l i3 4 K INVENTpR.

ug 9 l949- R. R. WARRINGTON COMBINATION HANDSAW AND MEASURING TOOL 2 Sheets-Sheet 2 Filed Aug. 8, 1947 Patented Aug. 9, 1949 eQQMBIATONe MEASUzRING v LVRicherf{RvifeuringtoniVictoria; Ontario,

'flV ,'1'his,.inizention relates, tmhand tools `andilxlore particularly Y to a combination hand SaW and measuring tool.

Arnain object ofthe.tinrentienis.ttqproizilee novel `and ,improved combination handgsawnd `ineasuring .tool mush. may.4 be emplpyedvimmaking4 linear ,or angular measurements, orgmey' be employed as a ,square r asa leyel,.'said`t001 being very simple, ,in construction, easmto use and Yaccurate in, performance.

A further object of i'llflenventionLis ,tqproyide an., limproved lcerieenterfs Jhand 4too1.norrnelly-em ployed .as Va. saw, which. is` also. useful as .a universal measuringtool. Sadtool Droyidilplg. means formarking angles, `measuring,unknown pitich angles, measuring -lengths, and. the, likeand ,involving only a few..simplemarts,.Whichere.readily assembled and inexpensiye to. manufacturegthe assembly beine :easy to 7.rrieripulete.;and heving wide utility in woodworkinggpperatiunsiandcarpeniry.

Further objects end.u ,advantegesoigthe .invention will become i apparent from the' ,fQllWin description and, claim, and liflemn4 the accompanying drawings, wherein:

` Figure 1 is van elevational viewpf o 1,1e s1cle1` of the handle `end portion of a combination" AI land saw vend measuringk tool constructed .in .aecordance with 'the present invention.

vFigurez is an elevational'view ofgjthef opposite side of the tool. structure shown in, Figuregnwith the handle angled Withjrespect to'gthe blade, es when the tool VisermfiloyedV to vmeasurejan vunknown roof pitch angle.

Figure 3 Vis anenlarged crossN-'seetionalfdetail View vtaken through 'the blade loclnngjportiQnV of the tool of Figure 1.

lFigure 4 is a crossesectional'detail viewtaken on line 4-4 of Figure 3.

Figure 5 is an. enlargedrossesectional detail View' taken vthrough the pivotal connection of x:Figure aisevieweimiiameenieure amen-she slide in retractedposition.

Referring to thevdrawings, llydesignates a. saw blade having the saw teeth l2 formed at its lower edge. Thetop edge offbladeglLis straightras ,Withf v"11fst..inehj, sealeill running.'from. the lierward timer the b1ade.to,.;the rearward.. end "115 thereof. 1;;Said, rearwardendgis,ercuetely euriied, asshownatj I6. i

Pii/olseily secured tabl-ede?! Latnl'l .is-e. ,handle I8. formed. witha slot; l 9 1in,.W.h .Ch.2"the rear. .end of "the" blade is secured, seiilgslot` allowingjthe hladeto beangled. with respect.. to .the handle." I'S, estshowngin'dotted" view. ..1n"Fieure.`1.. ar-oundthe pivotahconneetion' I l. "When "the ibladel irrite normal .position Withrespect to ,theihandlegas shown infull "line View.v in EieuretL .thefbottnm V of' ithe.;s1 t I9 L abuis; the .upper portieri, of 'the rear eurilededgeof theblede, 'asjishown. -at.;2 iniigure 1, whereby force, .meygbeireusmitted `from:,thezgharidle ,direetlyxto1,.,thegbladejas requin-:d ier ieicent. .use of 1t,he.to01 .as eisen The pivotel:1conneetienY `IT,-comprises. a 'heeded internally :threaded J'sle'eve "member '2l which passes through theehene .I 8 ,and through.en evening 1in' `the;sawlolelde; I l asshown .inEieure 5; "rhreadedinto: thesleevememben. l, isa, bell Mihai/.inea headflange-iormed with ahexa'eqnfal -Dertion which may-beferieeeed;by;a 4suitable wrench' to regulate lthe [pressure ef the 1 heed eneeof'eb'olt Z2 {inthe-,adjacent surfeeeefhandle I f'wherepy the clamping 'pressure 'of said 'jbolt at "the 'pivotal connection 11; mayfbeset toa desired degree.

T'Phe forward edgesV of fthe Vhandle J8v Aare straight, as "shown at 24, `and in the normal` posiytion offthe blade 1B areV at rghtanglestothe top `blade edge `;'!3. Adjacent;'thegseale--l'ithel top Derti'oniof eeehjside ofi'the'lladeiis markedwith efsecondiirrehJ scale' 25=beginni11g at A,the handle edgei24 andl'extending.towardjthe 'forwardtip'iof the blade. As shown j ineFigure' '1;A the' top edge portion; lof the'hlajde extends upwardly a substantial distance'beyond'lthe top edge'surfaees'zjof thehandle. "Il'ls enabl'es'he top edges portion of the -bladeto be ,laidioverj the edge or ja 'bpaid when making linear measurements thereon,'-When the tool isset-1in Iits= normal position. '."Sincej the handleiorward edges-24 are 'at right; angles to theb tou blade edge` l 3 infthis positiontheftopfl maybe'also employed as 'a square.

Bla'le" l l' vis .scribed or' grooved l v7with, angledefiriing' 'lines' 21 `extending radially"jfrom4 pivotal connetipni I1 and 'isuitahly `calibrated inl terms offdegrees "with 'respectf'torindex pointers 28g"at the" lower *forward corners of thef'handle'l. Carried ong-said' handle' 4is aiflrst'`v bubblelevel' and a yseg-,ond bubble leyelfq :positionedatright giggles -toji-level29-1 "..In measuring an unknown angle of inclination, such as a roof pitch angle, the straight edge I3 of the blade II is laid on the inclined surface and the handle I8 is swung around the pivotal connection I1 until the bubble of lever 29 is centered. The pointers 28 will then indicate the pitch angle at the calibrated angle lines 21. A

Threaded intothe, handle I8 adjacent the lower forward corner thereof is a hollow stud 3I in Which is slidably positioned a pointed ratchet member 32. Threaded on stud 3l is a cap 33. A coil spring 34 is positioned in the hollow stud, bearing between cap 33 and ratchet member 32. The pointed ratchet member 32 engages inthe scribed lines 21 and aids in positioning the handle at a desired angular setting with respect to straight edge I3 of the saw blade by producing an audible click each time the ratchet member moves past a scribed line 21.

The bubble level 3D is employed as a horizontal level testing device when the blade is set in its normal position with respect to handle I8 and the straight edge I3 is laid on the surface to be tested. The bubble level 29 is employed as a plumb testing device when the blade is in normal position by placing the straight edge I3 against the wall or other surface to be tested for perpendicularity to the horizontal.

Adjacent an upper forward corner thereof handle I8 is formed with a bore 35 and at the center of bore with a smaller bore 36 which extends to the slot I9 and is continued beyond said slot by a bore portion 31. Blade I I is formed with an opening 38 which registers with the bore portions 36 and 31 when the blade is in its normal position with respect to handle I8, as shown in Figures 1 and 3. Slidable in the aligned bore portions 36 and 31 and in blade opening 38 is a locking pin 39 having a circular head 40 which ts slidably in the larger bore 35. A relatively weak coiled springv4I is positioned in bore 35 beneath the circular head 4 0 andbiases the pin 39 towards release position with respect to theopening 38 in blade I I. The circular head 40 is formed with an inclined topsurface42 which is engaged by a depending bar 43 carried by a slide member 44, shown in Figure 7. Slide member 44 is longitudinally slidable in a recess 45, formed in handle I8 adjacent bore 35, said recess having a subadjacent portion 46 adapted to receive the lug 43 when the slide member is moved rearwardly in the recess. A pair of coiled springs 41, 41 bear between lug 43 and the rear Wall of recess portion 46, thereby biasing said lug forwardly into overlying relation to the head of pin 39 member 44 carries a serrated button element48 which projects upwardly through a slotted f rame plate 49 secured to'the handle I8 in overlying relation to slide member 44. When button element 48 is moved rearwardly againstthe biasing pressure of springs 41, 41, lug 43 is moved out of engagement with the inclined cam surface 42 of head 40, allowing the spring 4I to move the pin siide 39 to blade-releasing position. v When the blade blade is again rotated to its normal position with respect to the handle, at which time the pin 39 4 again enters the blade opening 38 and locks the blade in said normal position.

The forward lower corner of lug 43 is smoothly rounded, as shown at 49 to facilitate its camming engagement with inclined head surface 42.

It is thus seen that the blade I I may be readily unlocked by moving button 48 rearwardly and .willremain unlocked, vexcept lfor the frictional locking action provided by ratchet element 32. as long as the blade is in angled position with respect to handle I8. When the blade is restored to the normal position shown in full line view in vFigure 1, it is automatically locked by the movement .of pin 39 through the blade opening 38 produced by the biasing action of springs 41, 41 on lug 43 and the camming action of said lug on the inclined pin head surface 42. The coiled spring 4I. is relatively weak as compared with springs 41, 41 so that it does not prevent the return of pin 39 to locking position under the force transmitted to said pin from springs 41, 41 through the lu'g 43 and cam head 48. However, spring 4I is sun'iciently strong to raise the pin 39 to unlocking position when the button element 48 is manually moved rearwardly, as above described.

It will'be noted that the pivot sleeve member 2| has a relatively large diameter. This provides a substantial pivot bearing surface, thereby minimizing wear and maintaining the accuracy of the pivotal connection between the handle I8 and blade II.

While a specific embodiment of a combination hand Ysaw and measuring tool has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of theinvention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claim.

What is claimed is:

In a combination hand saw and measuring tool wherein thehandle is pivotally connected to the blade, means for releasably locking the handle to the blade in their normal position and against .pivotal movement, said means comprising a locking pin movably carried'by said handle, the blade having an opening to receive said pin when the handle and blade are in said normal position, a rst springmeans biasing the pin away from said opening, a cam carried by said pin, a slide member slidably carried'by said handleand engageable with said cam, and a second spring means biasing said slide member into camming engagement with said pin, said second spring lmeans being stronger than said first spring means, the slide member cooperating with the cam under the force of said second spring means to move the'locking pin into the blade opening when said opening comes into registry with said pin.

' RICHARD R. WAlRINCrTONQv REFERENCES CITED '.,The following references are of record in the file of this patent:

UNITED STATES PATENTS FOREIGN PATENTS y Country. Date Switzerland Nov. 14, 1935 Number umberv

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