US256499A

US256499A - Frame for gang-saw mills

Info

Publication number: US256499A
Authority: US
Publication date: 1882-04-18
Anticipated expiration: 1899-04-18

Description

(No Model.)

DE WITT G. PRESCOTT. FRAME FOR-GANGISAWMILLS. 7 No. 256,499., I I Patented Apr. 18,1882.

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' 'NrT-ED STATES PATENT I OrFrcE.

DE WITT O. PRESCOTT, OF MARINETTE, WISCONSIN.

FRAME FOR GANG-SAW MILLS.

SPECIFICATION formingpart of Letters Patent No. 256,499, dated April 18, 1882.

Application filed February 19, 1881.

Gang-Saw Mills, which are fully set forth in the following specification, reference being had to the accompanying drawings, in which- Figure 1 represents a side elevation of a frame for a gang of saws embodying my improvements, and Fig. 2 a front elevation of the same.

My present invention relates mainly to the construction and arrangement of the lower frame, on which the upper gang-frame is supported.

The invention consists of the special construction and arrangement of the main supports, whereby a broad base is obtained, and a bracing effect in both directions, and at the same time the side is open, so that the main shaft can be readily introduced or removed and the mechanism in theframe rendered easily accessible.

I will first describe the special construction of a frame in which I have in one way embodied my invention, andthe special improvement, which is believed to be new, and which it is desired to secure by Letters Patent, will be definitely pointed out in the claims;

As my present improvement relates solely to the frame,I have shown in the drawings only the supporting-frame, a portion of the gang-frame, and the main shaft, as these parts only are necessary for a full understanding of In the drawings, A A represent the sections of the main or supporting frame. These sec-' tions are made tapering from'the top to the bottom, as shown in Fig.2 of the drawings, so as to give a much broader base than top. Preferably they are metallic frames, and are intended to be cast in substantially the form shown. These two sections are arranged transversely to the line of cut of the saws, one in front and one in rear of the gang, and are inclined toward each other, as shown in Fig. 1 of the drawings, and arefirmly secured to a suitable foundation, B, by bolts or other ordinary devices t'or this purpose. It will beseen (No model.)

that these two sections constitute akind of pyramidal support, the sides of which are open, presenting afree and unobstructed space.

The gang-frame C is of ordinary construction, except that the side pieces, 0, are spread toward the lower ends thereof, so as to make a wider base-piece, c. This is to brace the tions A A in relation to each other. When the gang-frame is in position obviously the enlarged or widened bases of the side pieces will stand transversely to the sections of'the supportin g-frame, and the width of these pieces is to be such that they will reach across from the top of one section to the top of the other section of the supporting-frame, as shown in Fig. 1 of the drawings.

The gang-frame is firmly secured to the supportingeframe, as shown in Fig. 1 of the drawings, in which it will be seen that provision is made for a bed for the sections of the gangframe and for flanges to accommodate fastening-bolts, by means of which the two parts of the structure are secured together.

The main or crank shaft D is of any ordinary construction. It will be seen, however, that a free unobstructed space is provided at the side of the frame, between the two sections A A, so that the gang-shaft can be-introduced to its proper place beneath the gang-frame with great facility, and the mechanism inside the frame can be reached at any time without trouble for repairs or replacement directly from the side and without removing any parts of the mill. In frames of ordinary construction this cannot be done.

With this improved construction of frame I obtain a pyramidal support for the gang with a bracing effect in both directions, so that the gang is firmer and steadier than in any other construction of which I'have knowledge. I also provide for the ready introduction or removal of the main shaft and devices immediately connected therewith through the-open space in the side of the frame.

The details of construction may of course be varied, the precise mode of connecting the supporting-frame and the gang-frame beinges= pecially one of those details of construction which may be changed greatly without depart= gang-frame to the main frame and the sec- 1 ing from the principle of my invention, and I do not limit myself to the special details herein shown and described.

Having thus described my invention, what I claim as new,and desire to secure by Letters Patent, is-

1. The lower or supporting frame composed of two independent sections, A A, arranged transversely to the line of cut and inclined toward each other, in combination with the upper or saw frame, 0, the side pieces of which, at their lower ends, rest 011 the lower frame and extend from one section to the other of the latter, and are secured thereto, thereby uniting the said sections of the lower frame,

substantially as described.

DE WITT G. PRESCOTT.

Witnesses:

JNO. 0. MAoGRnGoR, ALICE HoLLis'rER'