US2604129A - Shaper dust hood - Google Patents

Description

July 22, 1952 F. 1. JOHNSON 2,604,129

SHAPER DUST HOOD Filed Jan. 27, 1949 2 SHEETS-Smm 1 Maffay/4.

July 22, 1952 l F. l. JOHNSON 2,604,129

SHAPER DUST HOOD Filed Jan. 27, 1949 v 2 SHEETS-SHEET INVENTOR. Fred f.- .JO/7275072.

of' Figure'V 1 Patented July 22, 1952 UNITE-o f l i Y SHArEi-noon-' l I. l l u y A Y Fred: I... Johnson. Sheboygan, Wis., assignor to Reiss Manufacturing Corporation, Wilmington, Del.,.a .corporation-' of DeIaware ApplicatonJanuary 27", 1945),.Serial'1Noz.73,202

f ters.

object off this invention isf toprovide a: dust collecting hood of. the type described which/will catch the shav-ingsL thrown off` by this Vtype of machineryat the source before they have a chance'to become scattered and'- interfere with the-cuttingl or shaping operation-being"carried out.

Furthermore,- itis-animportant objectA that the hoodopeningi be small? enoughto cooper-ate auto-4 matically-v with the contour of' the-workpieceV in such-away thata high efficiencyv ofi suctionv pickupmay be obtained.

It is afurther object ofthis'Y invention` to provide aI dust' collecting hoodA off a simple 'andrem-` pactdesign which maybe easily adjusted and adapted to the various autom-atic- 4Shaper-sf employed in the woodworking industry Still further objects of this invention will-become apparent from the detailed description.

given hereafter in connection with the attached drawings, in which:

Figure-1- isa topA plan view-of the-dustfhood; Figure 2 is a side elevation-ai viewofthe: hood Figure 3 is a fragmental' detailed view taken along the line 3'3 of Figure 2-, and' Figure 4 is a perspective view of' an' automatic Shaper with the improved' hood in its assembled relationship.

In order to more completely describe. applicants improved dust collecting, hood', reference will now be haditoFigures l through 3, inclusive,

in the drawings, wherein the dust collecting hood comprises an enclosure generally designatedas Il 1 having atop Il, a bottom l2, ends. I4' and' l5,

anda rear I8, Whichare preferably made of sheet vmetal. Top andA bottom. Il and I2, respectively,

are. identical in, shape. and. have a substantially U.shaped recess I3 formedin the front edge of" an. opening inV each. of theendwalls. Wall l-.is'vr relents, (c1, 14a-'2.52).

curvedto tthe contour of; therear sideavl. of

topand bottom plates Il and |2- andforms` the supportingmean's; for the top-and'l bottom plates alongwith-.end Wall;membersl l4-an'd |5 on threev sides:4 Thefront side-*20 of. the hoodis.-.open for the' purpose hereinafter-described; l

Adjustable hood gate 2lV forms parteiy the-front edge of the side wall l5 and is-fastened thereto by means: of hinge: 22- and a hinge fastening means such -asrmetalscrews` Inorder: that, the

' hoodgates` length may be adjusted,.it. ism-ade of two relatively adjustable. rectangularmembers- 24 and 25.. Two parallel slits126 are provided in member 25 `for the. purpose-.or this adjustable feature and by the. means of. two. adjustable yscrewsj 21 cooperating in slits and received by member 24, the length. oi the-:hood gata-.may

^ be extend'edorretracted as desired; Twozarcirate Z5 of- 1eather,rubber orother Suitable material, is

'spring'members 28; fastened on the-inside offend wallf I5, in the position shown, by screws. 29, ract as' a sto-p to prevent the hood gate from swinging inwardly into the hood beyond avdesiredadij-ustable limit. l

A rectangulanshaped' ilex-ibletongue 30, made Iixed along one of its longersides to the entire length of the fron-ty edge of end wall |14by 'any suitable fastening means such as metal screws and' washers 3l.

A vpivot post 32 isV fixed perpendicularly to the underside of bottom plate l2., asshownibymeans of. nut 33 onyal reduced screw threaded rendi-3l!- of one, end of the post', which isreceived by hole r3'5. The other end 36 of thepost isia reduced'end thus` providing a stop shoulder 31; forA pivotally supporting the. hood I0. n

At a point on the front` oithebaselZ, near the point at..` which side Wjallllll is -xed'gto base. I.2i as shown in. Figure 2,. iixed a. hood.- talus-up,y support. generally designated-as. 39.. member consists. of` a. flat plate. mounting means 40, fixed to the bottom of' basel-L by. meansofscrewsll, a vhood takefuppivot post` 4-2 i-iixed. vertically to the.. bottom of. themounting means 4U', a cylindrical. take-up. roller.43 received-'byan..opening therein by the pivotpost. 42,. a sealedroller bearing. .44. receivedbythe pivot. post fand...1totatably supporting. roller 43 arod 4.5 vrotatably received by meansof aneye 4-6 onpostAZ belowv the bearing 44, and. atake-up slidecap, 41, fixed to the end of post 4Z and holding members 45). M and 43 irlassembled relationship...

An angle. bracket.. member 4:8, having a. hole through its vertical portion. lliitsonftcijmdl 45 "ing the hood vabout the pivot'post 32.

icontour of the work changes, the take-up roller of the angle bracket 48 are two holes for receiving bolts 5I by which thebracket is xed to the hood supporting surface described hereinafter. About yrod 45 is the coiled tension spring 52 having one end xed in notch 53 in the vertical portion 49 of bracket 48 and the other end fixed to the end 54 of rod 45 by means' of two nuts 55 and 56 screw threaded on end y54.

A sash stop chain 5'I is fixed at end 58 to the wall I8 and is received as desired along. its length by notch 59 in the vertical portion 49 of bracket 48;

Av follower cleaner 60, preferably m'ade `of spring metal and having felt pads BI fixed at one end, is positioned within the hood ID as shown in Figure 1 by the fastening means 62.

In Figure 4, the hood I is shown in its assembled relationship with an automatic shaper generally designated as 63. This automatic Vshaper utilizes *af climb cut principle which is lcommonY in the milling machine art, the stockV 64 being-held in jigs 'which are driven past the cutterV spindle 65 at'a constant rate of feed by means of a sprocket on the cutter head spindle which engages a chain on the lower part of the form. The forms are ordinarily four-sided and clamp a piece of stock such as a chair leg in four different positions so that all four sides of the-piece may be machined. The form or jig carrying the stock is held in engagement with Vthe cutter head andthe drive sprocket by means of an air cylinder, generally designated as 66, Whichforces the workpiece forward. It is, of course, to be understood that the particular automatic shaper 63, the full details of which are not shown since it forms no part Vof this inven- "tion, is 'shown for purposes of illustrating the This hood may be, however,

uses of hood III. utilized with many other types of woodworking machines, such as routers, hand shapers, etc., and it is not limited in its use to the particular Whitney automatic Shaper shown.

The pivot post 32 of hood I0 is positioned in a hole provided vertically in the shaper table 61 at a position such that the U-shaped recesses I3 of the top and bottom plates closely nt about the rear half of the spindle 65 in such a position as to receive the shavings or dust thrown off by the cutter without allowing them to be scattered about` and, at the same time, without permitting the loss of efliciency in the air suction pick-up which is provided by a suitable exhaust .pump connected to the Y-connecter 68 which,

' is held in position by means of bracket '48 xed to top IiI` by means of bolts 5|.

It is seen that the spring 52 urges end I4 of the hood I0 towards the` workpiece 64 by pivot- As the 43, urged `by spring 52, follows this change in contour'and, therefore,` holds the end I4 of the hood asv close as possible to the workpiece. Flexible tongue 30 is provided in order to form a close seal with the workpiece and, at the same time, to prevent the workpiece from being scarred or otherwisejinjured by the hood as the wood passes across the cutter spindle.

Adjustable hood gate 2I may have its length extended in order to properlyvreceive the trailing edge of the workpiece without the loss of the emciency of the air suction system. In the case of thin stock, such as table tops, which may extend a considerable distance beyond the edge of the form before passing by the cutter head,

. this sliding'plate 25 canbe'notched so that the stock may pass through it. This does not materially affect the ei'liciency of the dust hood.

` A safety sash chain 5l is provided, as pointed out supra, in order to provide a limit beyond which the hood end I4 cannot be urged pivotally about pivot post 32. This, of course, prevents the hood from jamming with the spindle 65 after the workpiece has been fed completely by the cutter.

The follower cleaner 60 described above is for the purpose of continuously cleaning a guide collar located on the cutter spindle, against which the wooden form or jig presses as it is driven past the cutter spindle. Y

From the foregoing description of the improved hood and the method of assembling it with relation to a woodworking machine, it is readily seen that applicants type of hood has overcomethe difficulties encountered when employing the usual large canopy type hood. Applicants particular hood is not only small and compact in design, but also Oilers an improved means for picking up the shavings at their source and, at the same time, requires a less expensive type exhaust system for removing the shavings to an out of the Way discarding position, since it provides an eifective sealing means about the cutter and between the cutter and the workpiece being fed across the spindle thus presenting a minimum clearance for the escape of .shavings Furthermore, the hood is positive in action and follows the contour of a workpiece exactly, without offering mechanical difculties, such as jamming encountered in the type of hoods previously used in the art.

VIt is to be understood that the hood may be modified, if desired, by hinging it at the center and making one side rigid, or by hinging it in the center and providing each end of the hood with a spring urged hood take-up support, ror by a combination of other pivoted means which would employ the basic idea incorporated in applicants new and novel hood.

The terminology used in the` specification is for the purpose of description and not for limitation;l the scope of the invention being defined in the claims.

I claim:

1. An improved dust collecting device comprising a hood enclosure having top, bottom, rear .and end plates, an air exhaust duct connected to at least one of said end plates, aligned U-shaped recesses formed in the front edges of the tcp and bottom plates, a pivot post and a hood take-up support means, each ixed tothe underside of the bottom plate and each located on opposite sides of the saidU-shaped recess,v said hood take-up support being adapted to move said hood enclosure about the axis of said pivot post.

2. An improved dust collecting 'device compris- `ing aV hood having top land bottom plates',A vthe xed to the bottom plate at the other side of the U-shaped recess, said hood take-up support being adapted to move said hood enclosure about the axis of said pivot post, said hood take-up including a rodvflxed rotatably at one end of said takeup support, said rod having a supporting bracket sldably held thereon and a coil spring surrounding said rod, one end of said spring being fixed to said bracket and the other end being iixed to the other end of the said rod.

3. An improved dust collecting hood, as set forth in claim 1, wherein the end plate adjacent the fixed pivot post is provided with a hinged adjustable gate.

4. An improvedv dust collecting device, as set forth in claim 1, wherein a rectangular flexible tongue is fixed along the leading edge of the end plate which is adjacent the hood take-up support.

`5. An improved dust collecting device, as set forth in claim 1, wherein a follower cleaner is provided within the hood and is supported by the black plate.

6. An improved dust collecting device comprising a hood-having top and bottom plates, the front edge of each having U-shaped recesses formed therein, two end wall plates, at least one of which has an air exhaust duct connected thereto and a back wall plate, each positioning the top and bottom plates in spaced parallel relationship, said hoodbeing open at the front side, a first pivot post xed to the underside of the bottom plate and to one sideA of the U-shaped recess, and a second pivot post fixed at one end on the underside of said bottom plate and at the other side of the said recess, said second post which consists of a dust collecting hood having top, bottom and rear walls, ends open at the front, U-shaped recesses formed in the front edges of the top and bottom walls and adapted to partially p enclose the vertical spindle, said hood being provided with a pivot post fixed to the underside of said bottom and to one side of said U-shaped recess, means in said table for receiving said pivot post, and means for slidably supporting said hood Yat a position on the other side of said last-named U-shaped recess.

FRED I. JOHNSON.

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

UNITED STATES PATENTS Number Name Date 587,370 Middleton Aug. 3, 1897 799,641 Fox Sept. 19, 1905 1,079,032 Solern NOV. 18, 1913 1,109,186 rSolem Sept. 1, 1914

Images