US2329235A

US2329235A - Miter gauge

Info

Publication number: US2329235A
Authority: US
Publication date: 1943-09-14
Anticipated expiration: 1960-09-14

Description

Patented Sept. 14, 1943 UNITED EAT GFFIJQE.

' I '2,329,2e51;, f

v ,4 i vfi'r'lin GAUGE WillianimfieWoodward; Detroit, Mich." v

Substitutedf6ralte1idb1ied application-Serial No: 1621167; September 2, 1937-. Thisapplication Sptemlier5 1 941 Serial Ni): 409mm:

Thisinventionzrelates" to mit'er'gauges; such 'ets' are employed top osition a; pieceof {work in a re quireddefiniteangular relation" to, a: cuttin'g t ol; as" for" example; aZ'CiiCUISJr sawg TIfiS" iS a subf stitut'e" for my application Seria1Numlier'16'2j167; filedseptemberfi," 1937, emtifatlciandon'ed.

In the useiof su'cli' gauges;'certainengles; such" as ninety, andforty-fi've "degrees; are muchhuor commonly, required" than other's,f and it is 'desir alole to afford? a; particularlyquickand accurate settingjo'f "the 'instrum'envfo'rsuoh' angles; elimi nating such errors as areli'kely'to "arise"fromde"-' forpivotelly'connectihgltl'fe wbrk=engagingmein= berl and saidf'thirdmember to the supporting" member;

AL further objctl'is to fsofjintrpose" the. third memberkbetween'the supporting andmvorkehgefg' ing members that all three membersmaybei cl'ampediiin fiizedr'elation loiaeconimon meansiv A further. object-is to mount on the. third meml berm vanious elements adjustable to; assure. ac.- curaey, of the angular 'relitionsiv established: throughIusebL-such member.

These 'and lvariou's other objects are.' attained; by the, construction hereinafter. descriloedljandl illustrated. in the wherein: 4 I V Fig l'is artoplplan View oilthe improved'ga-ug'e-, as..adjfilsted.{to establish a ninety degreeereletion betwen the work-engaging. straight-edge and. the. supporting bar of the gauge.

FigFZAisa bottom'plan view .of thegauge,

showing a. forty-five" degree adjustment thereof. I Fig.) 3v isa. front view of the gauge, correspond? adjustment;

instrumentmay'be' 'selectively set? accompanying? drawing;

} pendence on'the registration of'gaiugemarkingsz of' 'the pi-Vot pest;-

Ih th'es'e views, the-referenee chareletl l desi' hates ran elongated supporting lo'ew surmounted at one end we b1ock2, welded or otherwise rigidly attached ito the bar. I I Rigidlyset' into= the hair 1, some distance from"sadd lrzltick, i'se po'st 3; and piv'otedthereon 'is -a plalte 4 of fajppro'ximatel'y semicircular "sha p its front ed'ge 5 f6rming an arc exceedingnin degrees, centered alt-said posten'd extendin n closeproximityto afiord a,- slight-adjustmentofsaidelement laterallfir ofthe block; To' p'ermit-of "securing the plate-"4 to the'ha r" l'i' in any adjusted position of"'sa-id"plat'e, a clampingnut I B is threaded on the" upper portiorflof a, post' I I? rigidly 'setdnto said bar; and-freely'extending' upwardly'tl'i'i'o gli a. slot-lz-" forming-an are centered atthe post" Stud-nut is adapted-110 apply clam 'in'g pressure" tn-the plate-tlirough e;=-washer= I' "bridgez-l across the-slot I2 as best appears-inl i'gz-45 i Descriloing now-' 2 provision for accurately setting the-gauge? without depending on the dC- s'cribedgraduationsy I iidesignates 2; memfier of" se'ctorshape, mounted at itsapproximate arpex pivotal independently of saidbar and p e the arcuate front edge Ma-ofsuchm emliew preferablyfiush; or approximately so,-- wit the ffont' edgeoflsaid plate. An a-pertnre m m -sen member freelyfacdomrnodates "the post H, and

allows'the-memherto"undergo an a'ng'ulali' 'travel- Fig; 4I'is a verticalfisectional"View; takenon' the clamping nut Inf-to se'cure bothsaid plateandi' membertothe -b'ar, inanyadjusted positions-$- At the extremities of? its a jrcua-te forward-edge;

the member I dhasapeJ-ii of forwardrejections atoppo'site' sides ofthe block" 2? oneinte'grally=- screws H and I9 carries a lock nut 2|, and is adapted to be held thereby in a selected longi--'* tudinal adjustment.

In the use of the described gauge, adjustment 1 of the plate 4 for any angle other than forty-five or ninety degrees, is effected by registering a selected graduation on said plate withthe index line I. To establish either forty-five degree position, the plate 4 is swung toward the desired position, thus engaging one of the shoulders 29) with the corresponding stop-screw I9. Thereupon the member I4 swings in unison-with said plate, until the movement of both is terminated by engagement of either the lug I6 or stop screw IT with the block 2. If said screw is properly set, either of the two forty-five degree positionswhereof one is illustrated in Fig. '2, will-be accurately established by the described adjustment.

Toestablish the ninety degree position of the plate, either shoulder is brought into engage ment with the corresponding screw I9, while the lug It; or screw I1 remote from said corresponding screw is engaging the block 2, a is exemplified in Fig. 1. The desired position being thus established, the nut I0 is tightened to maintain such position.

In initially setting the instrument, themember I4 is first swung to engage the lug it with the block 2 and is retained in such engagement while the screw I9 remote from such lug is adjusted until the plate 4, in engaging such screw, estab lishes an exact ninety degree relation between the fence and the cutting path of the saw or other tool (not shown), to which the gauge is accessory, Next, the plate 4 andmember I are swung clockwise in unison until the screw I1 encounters the block 2. Said screw is now adjusted until the fence 6 occupies an exact forty-five degree relation to the cutting path of the tool. While the member 14 is held in the position just described, the plate 4 is now swung until the screw I9 adjacent to the luglii is engaged by the corresponding shoulder 20. Said screw is now adjusted until an exact ninety degree relation exists between the fence 6 and the path ofthe cutting tool. Finally, the element 8 is laterally adjusted until the index line I registers accuratel with the proper graduation of the plate 4, when the latter is in any of its positions determined by the member l4, and is firmlysecured in such adj ustment. by the screw 9.

When thus set, the gauge will permit establishment of forty-five or ninety degree adjustments much more rapidly and with greater assurance of accuracy thanis possible when the settings are effected by registration of markings.

It is often the practice to alternatively dispose the bar I in either of two grooves (not shown) formed in a saw table at opposite sides of a saw, and such grooves'do not always occupy the exactly parallel relation that isessential to accurate functioning of miter gauges as heretofore constructed. The present gauge, however, permits of compensation for any such error ince there are two ninety degree quick settings and ing face, a pivotal connection between such members, a third member mounted on one of the firstmentioned members and movable with respect to the first-mentioned members about the axis of said connection, an index element onone of the two first-mentioned members, the other firstmentioned member having a set of graduations extendingin an are centered at said axis, and selectively registrable with the index element, and a pair of stops on the third member, one positioned for engagement'with the supporting memberftonetermine a certain position of engagement of theother stop by the supported member,- such position establishing a predetermined angularrelation between said work-engaging face and the supported member.

2. A miter gauge comprising a supporting member, a supported member having a workeng'a'ging'face, a third member interposed be tween the first-mentioned members, a common means for pivoting the supported member and third member on the supporting member, affording them relativea'ngula'r travel about their'common pivotal axis, and a pair of stops on the third member, one coacting with the supporting member and the'other' with the supported member, to establish the work-engaging face in' a desired definite angular relation to the supportin member.

3. A' miter gauge comprising a supporting member, a supported member having a-workengaging face, a pivotal connection between such members, a thirdmember mounted on one of the first-mentioned members and movable with respect to both first-mentioned members about the axisof said connection, an index element on one of the two first-mentioned members, the other first-mentioned member having a set of graduations extending in an are centered at said axis and selectively registrable with the index element, an abutment carried by the sup rting member, a pair of stops carried bythe third memher, at opposite sides of the abutment, and engageable with the abutment to establish different limiting angular positions of the third member, a second pair of stops carried by the third member,; at opposite side's of the abutment, for engagement by the supported member, each stop of the second pair having two positions of use established by engagement with the abutment of theifirst-mentioned pair of stops, whereby said abutment and stops are adapted to establish four difierent angular positions of the supported member.

4. A miter gauge comprising a supporting member, asupporte'd member having awork-engaging face, a third member interposed between thev position of the third member, and the supported member having a part engageable with the other tions thereof, and the supported member having two stops angularly spaced as regards rotation about the pivot member and alternatively engageable with the third member in each. of its said angular positions, whereby each of said positions of the third member determine two different definite positions of the supported member.

arcuate edge, a third member mounted on one of the first-mentioned member and movable with respect to the first-mentioned members aboutsaid axis, and having an arcuate edge approximately flush with that of the supported member,

an index element on the supporting member correlated with said graduations, and a pair of stops on the third member, one positioned for engage: a

ment with the supporting'member, to determine a certain position of engagement of the other stop by the supported member, such position establishing a predetermined angular relation between said work-engaging face and the supported member.

6. A miter gauge comprising a supporting member, a supported member, a pivotal connection between such members, a third member mounted one one of the first-mentioned member and movable about the axis of said connection, the supported member having opposed edges, one forming a work-engaging face and the other forming an are centered at the axis of said pivotal connection, an index element on the supporting member, a set ofgraduations being extended on the supported member from its arcuate edge for selective registration with the index ele ment, an abutment rigidly carried by the supporting member in proximity to said arcuate edge, and a pair of stops carried by the third member adjacentto said arcuateedge and at opposite sides of the abutment, one of such stops being engageable with said abutment in a predetermined stop in said position of the third member, whereby a predetermined angular relation of said work-engaging face to the supporting member may be established in said position.

'7. A miter gauge as set forth in claim 6, the supported member having two shoulders, respectively engageable with the respective stops, to establish desired angular positions of the workengaging face, in two'positions of the third member,.in which positions, the other stop engages a said abutment.

8, A miter gauge as set forth in claim 6, the supported member having two shoulders, respectively engageable with the respective stops, to establish desired angular positions of the work-engaging face, in two positions of thethird member,-in which positions, the other stop engages said abutment, each of said stops comprising an adjusting screwto engage the coacting shoulder of the supported member and one of said stops comprising an adjusting screw for engaging said abutment.

' 9. A miter gauge comprising a supporting member, a supported member having a work-engaging face, a third member interposed between the two first-mentioned members, a pivot member mounting the supported member and third member coaxially on the supporting member, and affording them individual angular travel, a pair of stops on the third memberalternatively engageable with the supporting member to establish either of two limiting positions for said travelof the third member, the supported member having two stops angularly spaced as regards rotation about the pivot member and alternatively engageable with the third member in each of said limiting positions of the third member, whereby each of said positions of thethird member determines two different definite angular positions of the supported member. 4

. WILLIAM H. woonwAnn.