US2379503A - Sander - Google Patents

Description

July 3,1945- s. R. TEAGER SANDER Filed 001;. a, 1945 'INVENTOR Stephen R. Teager -ATTORNEYS 7 Patented July 3, 1945 ."sm StephenR. Teagenl'lantom-Ohlo Application October v .1 claim. (01.514213).

' This invention relateslto woodworking machin eryand particularly to means forcollecting dust generated by the action of a brading or other'cut ting elements upon the surface of the'work.

Th ention has f r, an bject to utilize maindriven element of the machine to create a suction that creates an air stream that envelops the surface of the work being actedupori bythe machine to sweep all dust created by theabrasive or other cutting. implement into a suitable collector and prevent contamination of the. air adjacent the machine.

. A further object of the invention is to provide a dust collecting device that adds but little to the cost of the machine, which occupies a small 'amount of space and which is highly efficient in operation.

With the above and other objects in view .;the

invention may be said to comprise the device illustrated in the accompanying drawing, hereinafter described and particularly set forth in the appended claims together with such variation and modification thereof as will be apparent to one skilled in the art to which the invention pertains.

Reference should be had to the accompanying drawing forming a part of this specification in which: g

Figure 1 is a side elevation of a sanding machine embodying the invention;

Figure 2 is a front elevation of the machine shown in Fig. 1.

Figure 3 is a section taken on the line indicated at 3--3 in Fig. 2.

Figure 4 is a fragmentary detailed view showing a portion of the sandpaper locking ring.

Figure 5 is a side elevation showing the invention applied to a. lathe.

In the accompanying drawing, the machine of the present invention is shown mounted upon a work table I which has a work support 2 mounted thereon adjacent one end to which is attached a blower casing 3, the casing 3 being secured to the work support 2 by means of bolts 4. The

blower casing 3 has a tangential outlet Stand a rear wall 6 upon which is mounted a motor 1 that has a shaft 8 which extends into the casing 3. The casing 3 has a front wall 9 provided with an opening III of substantially circular forrnk-Tand disposed concentrically with respect to the shaft,

8. The shaft 8 carries a drum l l within the casing 3 and this drum has a hub portion I! attached to the shaft 8 as shown in Fig. 3 and provided adjacent its inner end with a projecting flange I 3 to which is attached an inner fan forming flange Thedrum' ll has a frontsection that section I of the drum. 'Thesection may be in the form of a one piece casting, the body-portion of which is in the form of a, flat disk attached to the flange l3. The section I 4 has a cyli'fndrical" forwardly extending flang li together with'curved fan blades l6 extending'outwardly from the flange 15 and integral with the disk and has a'fiat' facell that bears, againstthe forward end of thehub I 2 to' fo rm 'the front wall of the drum and a cylindrical 'flange- IIB that'fits within the cylindrical flange 15 of the fan section I4. The flanges l5 and I8 are secured together by means of rivets I 9 and the outer face of the front wall I! of thedrum lies substantially in the plane of the front face of the wall 9 ofthe fan casing. The drum H is of a diameter such that the portion thereof extending into the opening l0 forms a narrow annular slot 20 between the periphery of the drum and the margin of the opening I.

The shaft 8 is the main driven shaft of the machine being a, rotating support either for a cutting element or for apiece of work. In the modification shown in Figs. 1 to 4, the shaft 8 serves as the spindle of a cutting element in the form of an abrasive disk, while in Fig. 5 the shaft serves as the rotary work supporting spindle of a lathe.

The cutting element may be in the form of a sandpaperfacing 2| for the front wall ll of the drum H and this sandpaper facing may ibe secured to the drum by means of a clamping ring 22 slidably mounted upon the drum periphery forwardly of the fan blades l6 which are offset inwardly from the front end of the drum. The ring 22' has one or more bayonet slots 23 that receive lugs 24 projecting from the periphery of the flange l8.

As shown in Figures 1 and 2 the work support may be provided with a horizontal plate 25 that extends across the front wall of the supporting casing somewhat below the axis of the drum H to provide a support for pieces of work being abraded by the action of the abrasive facing on the drum ll. t I

A suitable dust collector which may be in the form of a; filter cloth bag 26 isattached to the tangential outlet 5 of the fan casing which may be directed downwardly to position the collector beneath the table and serves to strain the dust from the air blown through the wall thereof.

The dust collector 26 may be provided with a detachable bottom 21 that, enables the filter bag ing 3, the motor housing having an attaching plate 28 serving. as a closure for an opening in the rear wall of the casing through which the drum and fan are passed upon insertion into or removal from the casing.

In the modification shown in Fig. 5, and the casing fan and drum may be identical with the corresponding elements shown in Figs. 1 to 3, the casing 3 being attached to-a bracket 30 at the end of the worktable jtfheshaft 8 in this instance,

serves as}; wiirl; stlpfioftthig anil driving spindle having a work engaging dog. 3| jwhich'cooperates with a center 32 carried by a tail stock 33 to ro- 4 tatably support the work.

In both of the modifications disclosed a strong current of air envelops the exposed, surface of the work and flows axially of the rotating'drum into the annular slot 20 andsthrougnthefanr'rveloping the surface of the work being acted.

upon provides a very effective barrier against the passage of the dust from the surface of the work into the atmosphere of the room in which the machine is located.

It is to be understood that variations and modifications of the specific device herein shown and described for purposes of illustration, may be made without departing from the spirit of the invention.

'In'a machine of the character described, a supporting table, a blower casing mounted on said "table said casing having a tangential outlet, a iront wall provided with a substantially circular opening and a rear wall spaced from the front wall, a"shaft'extending into said casing concenblades l6 and outlet 5 to the dust collector 26.

Particles dislodged from the surface of the work tricwith said opening, a drum fixed to said shaft and projecting into said opening, said drum havin'g 'a -f'ront end substantially in the plane of the front face or said casing and .aperipheralportion within the opening and forming therewith a narrow annular air inlet slot,rfan blades mount.- ed uponjthee iterioroi the drum and spaced in; wardly irom the front end thereof, a lug projecting from the periphery of said drum, and a sandpaper clampingring'mo'unted on theperiphe cry of said drum between said: blades and the front 'end'oi the drum, saidringhaving a bayonet slot to receive said lug}; ff

it. TEAGER.

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