US1157109A - Jointer-guard. - Google Patents

Description

-I f II A.YF. HOWE.

JOINTER GUARD.

APPLICATION FILED JULY I1. I9I3.

Patented 00L. 19, 1915.

2 SHEETS-SHEET I.

I IIIIII IIIII A. F. HO'WE.

JOINTER GUARD.

APPLICATION FILED IuLY I7. 1913.

1,157,109. Patented om.. 19, 1915.

2 SHEETS-SHEET 2.

. "to be `dressedalong;E the 'table @granite City? in theboiinty ofjMadison and .f

State of Illinois, Lhave iniiente'd a fiiew Tand iseful "Improvement, 'in "Jointer-Gqufards, of which the'folglofwingis "a sbecication:

Y g :Myifvecinfrelaes wia andf'has forfits-object"to'ipreventfjthe hands` .operatr from' revolyinglmiyes. While passingLthje materiall it therefromfwhenlirfished. 'r?

, *It "onsists inif featifiresi ofinovelty as here;

inafter described? andieYlairned,l reference `vibe;- iilg had t' the aecomp anying-draiyizing yformiiigj part of epeeicatio'; 'Whereon,

fiFigure 'is a Atop 'Inyafimproved j'oiiiter "guardiI asfaippliedtofa cylindrical `Vreyolyiag jbutter andits table (broken: away-)1;

n having the" cuttingfr edges of the knivesll projecting, thr'iigh part" off their travel., above Jchef-table f?) in usualj 'yvelllnown manne'rff- 1 `=`rl-lVlyfiInproyedA jolnter guard comprises Va 'hod "or 'rnain membery c vwhich is arranged over the ],ointer cutter a; (orthereabont transversely andpara'llel to the table 72," prefera'blyl fforV rits etire ryific'tli and" beyond' oneJ from? f y vSpecicativonof Letters.Zlib-Agent.v

`'ofthe table-Z2 and thence directed'tangen.

4Patented 0015,19', 1915. 'JS-erllldf'- n the'imler endete-dependent arm orauXiL on its underside vto `Within a1 lshort" distu'iee tially pwardto its outer-endf'ata suitable distance from the` table"l and... suitably -indicated by the" arrow, in Fig. 2, thearin dir (erfarrnsaccording x*to the' .Width ofthe material and Corresp ending number. .ofarms engaged) will beengaged" by thelforward latter is advanced, and raised'intcithe.'Jeosi tionfindi'catedl-,by dottedglines inl-FigaZ, or 1 vso 'that the material'` e will "pass beneath .the

2 on. the front. side of thehood-@fishinged i i'ary'member Ziyvhich'is preferably" :convexV operating "as a guard to prevent'x the hands oifvtheV operator 'from comingin-Contact with the knives 1' @f the jointef'marea."1.5111114. larly, .tothe rod 4f on the reary sdeoff'the hoodfc 'is hinged in each'notch fgfal prefer.- a'bly,. vertically .dependent arm or, axilia"ry member d," which' is suitably shapedatj its bottomfend Within a suitable distance of the lover; and rearward I i'rom` J the 0in-ter r cutter @its forward end Will, engage the armldf and thereby ,constrainF itY .outward on--its so that as'fthe material-'eis advanced hinge 4 into the position indicatedfby dot- .Y

ted lines in, Fig. 2, theibottom-end of-the arm, CZ" in so doing.bearing'on` the material- 'e and thereby operating cooperatively with the Ehood .0, as a v,guard orpreventingithe hands offthe operator from ,coming incont`act with thekniyes lwhen withdnawing' the finished material e from' the-tablefb. For breyenting inwardfmovement Iofthe arms el about their hinge 4when-v they.,l are engagedfbythe 'materialjfethetrear side .of Y

each: 'isf'forrned its hingea4 yyitha dependent. lug 5i Whichfin the normal'posie nor'nialnositieii. isiadapted tongage ajcdfs 'ftEor/supportingf the'hoedlctand its l through, and is firmly held in a boss 10,

which is formed in a lever f, which is fulcrumed on and movable in a vertical plane about a pin or stud 11 projecting from` the side of the table i Projeetingcentrally from the outer face of, and integral with the hub 12 of the lever f, is a vstud 12, through which, and through the hub 12 the fulcrum pin 11 passes as shown, and on the stud 12 is pivoted loosely at one end, a lever f, which is normally in alinement with, and rearward of the lever 7".

Projecting radially from the periphery of the stud 12 is a lug 13 (Fig. 2) which is adapted to engage in a recess 13 formed part-way around the inside of the hub 1-1 of the lever f', the latter being provided with a counterbalance weight 15 which yis adjustable thereon, and the whole so arranged that when the levers j, f, are in their normal position in alinement with each other as seen in Fig. 2, the recess 13vis brought into engagement at its lower end, by the weight of the lever j, with the lug 13 of the stud 12, whereby the hood c with its appendages is normally heldin place over the jointer cutter a.

The end of the bolt 8 where itpasses through and beyond the lever f is provided with a nut 16 which is tightened against the outer face of the boss 10, the latter being clear of the under or concave side of the hood c at all times in the operation of the parts, as hereinafter more particularly referred to, and furthermore, in this connection, from the top or convex side of the hood c projects upward a lug or handle 17.

Depending from the lever f adjacent to its boss 10, is a bar 18 which isfpreferably, T-shaped in cross section and radial to the fulcrum 110il the levers f, f', the'bar 18 being adapted to slide Yfrictionally tight through a correspondingly shaped guide 18 fixed to the side-vol' the table b. The lever f is formed at its-outer end beyond the boss 10, with a handle 19, whereby,

when the material to be dressed by the jointer cutter a is too thick Jfor the` auto- Y matic operation of the arms d, cl in its passage along the table b as described, the lever fwith the hood c and its appendages can be raised by hand about they fulcrum 11 sufciently to allow of the passage of the material and the automatic action of the guard, the lever 7 when so raised being held in the desired position'by'the rictional grip of the bar 18 in its guide 18. Furthermore, when desired, the lever f with the hood c and its appendages may be thrown up, and over, about the fulcrum 11 in the direction of the curved arrow in Fig. 2 entirely clear of the jointer cutter a, in which case, when the lever 7 is in the opposite' position the counterbalance lever f', in lieu of remaining in alinement with the lever f will tall to an inclined position thereto, or below the table b, owing to the play allowed for the lug 13 of the stud 12 along the recess 13', as indicated by the dotted lines in Fig. 2.

In applying my improved jointer guard in a caserwhere the edge of a board or other wide material is to be dressed by the jointer cutter a, the hood c withits appendages is withdrawn by its handle17 to one side of the table b and beyond the lever f so as to uncover the jointer cutter (L for a part of its length, the boss 7 of the hood c in so doing, sliding along thebolt 8 (which is held fast by the boss 10 of the lever f) until stopped by the inner face of the boss 10 of the lever f, or in the position seen inzFig. 5, when the board to be dressed on its edge is passed along the table b over the uncovered part vof the cutter a. the operators hands being intercepted and prevented from coming in contact with the cutter knives 1 by the adjacent end of the retracted guard.

What I claim as mv invention and desire to secure by Letters Patent is 1. In a jointer guard, the combination of a hood member extending above the table and adjustable relative thereto` a plurality of separately movable fingers pivotally supported upon said hood member and extending in advance of the cutter to form a shield and supported above the table, said lingers having upwardly and forwardly directed endsadapted to ride over the work presented to the cutter in such fashion that the tingers engaged by the work are-swung upwardly to permit its passage, the fingers not so engaged remaining in their normal position whereby to form guards at the sides of the work. 2. In a jointer guard, the combination of a work table for supporting the material to be operated upon, a bar arranged above said table, means whereby said bar may be instantaneouslyV adjusted to different heights above the table, a set of independently movable guard arms carried by said bar. said guardV arms having their-lower free ends eX- tending upwardly and outwardly at an angle whereby when the material to be operated upon is passed under the arms it will contact with said extensions and lift the respective. guard arms in its path, and means carried by said bar for engaging said guard arms in. their normal or lower position, terial to be operated upon irrespective of Whzreby the forwardly and upWar llyeXl v the/thickness of said material. ten ing ortions o the arms are maintaine -y Y K in such aliigula-r relation to the Work table in ANDREW F HOWE 5 different vertical adjustments of the bar Witnesses:` l

that the guard arms are always in proper A'. J. Groolplam'r,v position to be lfted'by Contact with the Ina- K vJ. C. STEELE.v p

Copies of this patent may be obtained for ive cents-each, vby addressing the Commissioner of Patents,

. Washington, D. C. Y Y

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