US544694A - Band-saw-mill attachment - Google Patents

Description

Patented Aug.v 20, 1895.

N SHAW. BAND SAW MILL ATTAGHMBNT.

(No Model.)

No. 544,694.v

`bviiljzssaes I *I 0142/10@ )gy eArgQeys.

. provide a device, the nature of which will be UNITED STATES".

PATENT I EEICE.

NOAH SHAW, OFEAU CLAIRE, WISCONSIN.

BAN o-sAw-M LL ATT-ACH MENT.v

SPECIFICATION forming part of Letters Patent No. 544,694, dated August 20,1895.l

' Application fina April so, 1895. l

consin, have invented a new and useful Band- SaW-Mill Attachment, of which V the following` is a specification; y

This invention relates to an improvement in attachmentsfor band-saw mills..

The object of the present invention is to hereinafter described, having for its purpose to prevent the fine dust, duc., from entering the center of the lower band-wheel, dueto the suc'tionvcaused by the rapid revolution of lsaid band-wheel. p l 1 To this end'the invention consists in certain novel features and details of'construotion and arrangement of parts, as hereinafter fully ythrough the opposite walls or sides of the housingor pit in which said wheel is located; Fig. 3 is a similar view showing the application of my improvement when used in'connection with a Wheel having an imperforate we b.

Similar numerals of reference designate corresponding parts in the figures ofthe drawings.

This invention contemplates the use, in connection with the lower band-wheel of a bandsaw mill, of a disk or circular plate designated by the referencenumera1 l. This disk or plate is made-about vthree inches less indiameter than the inside diameter of the rim of the lower band-wheel, indicated at 2, so as to leave` an annular space 3 ybetween the disk and wheel-rim. The outer edge or periphery1 of the disk l. is curved inward toward the wheel in such -manner as to bring said edge within the side edge of the wheel-rim. Where v. the band-wheel has arms or spokes 4 the disk l is provided with a central perforation 5 and fitted tightly around the band-wheel shaft indicated at 6.

is to prevent thefine dust produced by the cut of the band-saw fromentering the central The object of this-construction- Serin No. 547.690. on maui part of the wheel, due to the suction caused by the rapid revolutionofsaid wheel. When the dust is drawn in at the center of thewheel,

where no guard is provided, said dust is carried around with the saw-and wheel, and, as

a result, the outer face of the wheel becomes coated with Asuch `ne dust, whichcauses a great deal of trouble, necessitating the fre? quent stoppage of the mill in -orderto clean the face of the wheel. Besides this a quantity -of the dust follows the saw in its upward-passage to the upper band-,wheel and is vthrown thereby and scattered upon the Sawyer, grad ually covering the timber and the surface ofthe upper portionvof the frame of the mill .with a Substance highly inflammable after it becomes thoroughly dry, which happens in about three weeks.' The disk l, being stationary, may be secured to theusual bearing-han ger 7 ,or other convenient point.v

As band-saw mills are usually'constructedv the lower band-Wheel is incased on all sides andthe dust is conveyed therefrom by suction through suitable carrier-pipes. The inside partition of the Wheel-pit, as indicated at S, is beneath the bed of the mill and is usually located in close proximity to the band-wheel,v

an aperture in the inner partition or wall 8 of.

the casing orpitfadjacent to the center of l said wheel'. The air thus admitted can pass through between thespokes of said wheel to the opposite side thereof andthence out' through the'annularspace referred to.

In Fig.,3 I have shown the manner in which thel disk is applied to a wheel having animperforate web in lieu of the spokes of Fig. 2.

4In this case the disk is provided withan aperture adjacent to and Surrounding the shaft of the band-wheel, said aperture being of a sufficient size to admit air from. that side of the wheel." l0 designates afresh-air spout which issecured to the outer` face of the stationary disk l and connected therewith in suchmanlos ner as to prevent the admission of dust" massi through the aperture in said disk. The freshair spout extends upwardly above the cover of the pitor housing in which the Wheel revolves and is open at its top to allow the air to pass down to the aperture in the disk and thence into the wheel, from which it escapes through the annular opening or space 3 between said disk and the rim of the wheel.

The device above described is very simple and inexpensive in construction, but will be found very efficient in practice, effecting, as it does, a great saving in the time of the sawlyer, for the reason thatv the mill requires less attention and cleaning-than under the usual arrangement. By supplying air that is free from dust tothe centerof thewheel-the fine dust which enters the pit o r housing is not attracted to the wheel and eithertalls to the bottom of the pit or is immediately carried off by means of the usual devices for this purpose.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is` 1.` In a band saw mill, the combinationpwith the band wheel thereof, of a disk disposed at one side of said wheel andhaving aldiameter which is slightly less than the internal diameter of the wheel rim` and having its edge or periphery deflected inward, substantially in the manner and for the purpose described. 2. In a band saw mill, the combination with the lower band wheel thereof, and the usual pit or housing in which the same is mounted, of a disk arranged at one side of the wheel and of smaller diameter than the internal diameter of the wheel rim, said disk also having a central aperture adjacent to and surrounding the wheel shaft, and an air spout arranged outside of said disk and communicating with the central aperture therein, substantially as and for the purpose specified.

. 3. l Ina band saw mill, the combination with the band wheel thereof, of a circular plate ordisk having a diameter .less than the internal diameter lof thewheel rim` and fitted on one side ofthewheel in'suoh manner as to leavean annular space between the periphery of said plate or disk and` the wheel rim, for the purpose described."

'In testimony'that I claim the foregoing as y my own I have hereto aliixed my signature in the presence ot' two witnesses.

NOAH SHAW. Witnesses:

" L. A. SHAW,

WJ W. JACKSON,

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