US1580407A - Band saw - Google Patents

Description

April 13, 1926.- Y 1,580,407

J. A. CARLSON BAND sAw Filed 'Jul-y 28, 1924 'i l`NvF'NTc-)uR w fr' Y v 'ToRNEY &

Y Patented Apria, 1926.

y provements 'in Band Saws,

. places,

, penters, cabinet vor 1 JonN LICARLsoN, or lucana, WASHINGTON.

` Appunti@ mea my 2s,

factory results for tion embodyingvasupporting frame forthe various parts ofthe saw which constitutes a protecting `housing wher'ebyinjury, due to carelessness oraccident', is not possible.L

Auother object of thefinvention yresides in the details ofconstruction of means forloosening vor tightening the saw band, andl whereby tension is maintained thereon yduring its use. n

A still further object resides-inthe yprovision of a tiltable saw table `and means for locking itat different positions of adjustment.

Other objects of the invention reside in the various details of -construction of the supporting frame and housing.

- ln accomplishing these and other objects of the invention, I have provided the improved details of construction, the preferred forms of which are illustrated in the acoompanying drawings, wherein Figure 1 is a front'view of a saw embodyingy the lpresent invention with the housing doors removed in order to better illustrate the construction and combination of the interiorly located parts.

Figure 2 is a vertical, transverse sectional view taken ythrough the upper part'of the housing to showy the saw mounting wheels and the'drivev means therefor.

Figure 3 is a perspective view of the same i. band tightening means.

. ings-` Figure -4 is a detailed perspective view of the table locking means.

' Figure 5 is a transverse', sectional view through the table mounting. 1

Figure' is a detailed, sectional view of a part of a saw band supporting wheel.

Referring more in detail to the ydraw- Mounted within 1924. seal-N. 728,635.

1 and 2, respectively, designate' lower.

houslngs wherein the saw and upper box like bandsupportingl wheels and band tightening means, presently. described, are contained. The upper housing lower bymeans of a post 3 that is fixed rigidly to these parts'and which is of such length that it `provides working spacebetween the two housings wherein a sawv table 4 is tiltably mounted. v

Doors 6 and 7 are provided for 'the housings,

whichare normally closed but'which may be openedk to give access to the interior mechanism.

the lower housing is a 'saw band supporting wheel S'that'fis lixed'upon the outer end of" Amountedfin a band' a shaft 9, rotatably blocklO. On thezinner end ofL this shaftfa belt wheel 11 -isixed; this being vertically alined lwithadriving belt wheel 12 on the shaft 13 onf an electric motor end of the housing.- A belty 15 operates over these wheels todrive the 14 located within 1the lower band lwheel 8'. A sawband 2 is'supported from the,

an Y intermediate mounting wheel 17 is mounted the upperend portion off Y in housing 2 in'vertical 'alinementwith the band wheel 8; the w on a spindle 18 that is 19 that-is held vertically slidable by guide plates 20 fixed to theback wall 21 of the housing and acontinuous saw band 24 extends over the wheels and is retained thereon during operation due tothe convexity heel 17 being rotatable fixedrgidlyto a platel sa l of the wheel surfaces as is illustrated at 25, in Figure 6. @The saw band 24 moves upwardly adjacent the post 3 through slots 26 and 27 and moves downwardly through Slots 28 and 29 in the housing walls; all of the slots being extended to the edge of the housing walls so that the band may be slipped on or olf the wheels and removedfrom the housing.k

y.The means provided for retaining tension on the saw band and whereby the latter may be released is best illustrated in Figures 1 and 3, whereiny 30 pivotally supported pin 31 from the back wall of housing2. One end-of the lever has an end slot 32 that designates a lever that is y between its ends by a v slidably receives a stud 33 that is fixed-to the upper end of plate 19. y The other end of the leverr has an outturned ear 35 to which the Vupperend of a tension spring 36 is attached; the lower end of the spring being xed within. an eye `of a bolt 37 that is adjustably-ixedt'o an outwardly turned flange 38 formed at the lower end Vof a plat-e 40 that' is mounted for vertical slidable movement on the back wall oic housing 2 bymeans oi guides 42. A lever is pivotally iixed` at its upper end to a plate 46 fixed to the side wall of housing' 2, and a link 47 pivotally connects at its ends to lever 45 and plate 40. llVith this construct-ion, when lever 45 is swung downwardly,y link 47 causes plate 40 to move likewise and this places .tension on siri'nv' 'whereb lever 30 causes lu )wardy wardly extending' side flanges enclosingthe seatt) and provided with `radial grooves 54 wherein said ribs 5l arer slidably iitte'd.

The mounting` permits tilting of the table to various positions as shown in dotted line' in Figure l.

To retain the tablev at any adjusted position, I have provided a radially curved supporting lbar that is fixed at-one end to the under side of the table and extends `slidably through'a slotl in a plate 6l lixed wit-hin the upper wall of housing` l. A locking' lever 63 with an eccentric head 64 is pivotally mounted on the plate and this may be adjusted to clamp the head against the bar to hold it and the saw table any setposition.

As a means for bringing the saw table to horizontal position, I have lixed a leg 65 to the undersideat'the'lback edge thereof. This post is adapted to rest upon a pivotally secured plate GG that overlies an opening 67 in the top wallot'the lower housing. If it should be desired to vtilt the table rearwardly, the plat-e is moved so as to uncover the open-- ing so that the post conld'move downwardly therein.

By so constructing the saw frame and` housing, all the operatingparts are enclosed and injury by carelessness, or accident is not possible. All saw dust will be carried by the saw into housing' l and will not scatter over the saw table or work. Saw bands thatbreak can be easily removed and replaced, and'easy access can be had to all parts oi' the mechanism. Y 1

Having' thus described my invention, what I claim asnewtherein and desire to secure by Lettei's-latent, is;

In a saw of the' class described, a saw band mountingwheel, .a slidably ysupported mounting' for said wheeh'a stud Y on said mounting, a pivotally mounted lleverhavinp;

connection at one end with said stud, ai

slidably mounted plate, a spring connected to said lever and to said plate, a pivotally mounted lever and a link connecting' the said leve-r and plate whereby the plate may be moved to remove or place tension on the` spring forthe purpose setl forth. e

Signed at Everett, Snohomish County, lVashington, thisrSOth day of June 1924.

JOHN A. CARLSON.

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