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Publication numberUS392943 A
Publication typeGrant
Publication dateNov 13, 1888
Publication numberUS 392943 A, US 392943A, US-A-392943, US392943 A, US392943A
InventorsJohn W. Blake
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 392943 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

O (No Model.) 2 Sheets-Sheet 1. J. W. BLAKE.


Patented Nov. 13, 1888.

(No Model.)

2 SheetsSheet 2. J. W. BLAKE.


No. 392,943. Patented Nov. 18, 1888.

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' SPECIFICATION forming part of Letters Patent No. 392,943, dated November 13, 1888.

Application filed February 16, 1888. Serial No. 2643110. (X model.)

To aZZ whom it may concern.-

Beit known that I, JOHN \V. BLAKE, ofJersey City. in the county of Hudson and State of New Jersey, have invented a certain new and useful Improvementin Machines for Sawing Hoops, of which the following is a specification.

I will describe a machine embodying my improvement in detail, and then point out the novel features in claims.

In the accompanying drawings, Figure 1 is a front elevation, partly in section, of a machine embodying my improvement. Fig. 2 is a side elevation of the same. Fig. 3 is a horizontal section thereof, looking downwardly, the section being taken on the plane of the dotted line a: as, Fig. 2. Fig. 4 is a detail view of certain parts on an enlarged scale.

Similar letters of reference designate corresponding parts in all the figures.

A designates the frame of the machine.

A designates awhcel mounted upon a shaft, 1), journaled in the frame A.

A designates another wheel mounted upon a shaft, a, journaled in bearings a in a sliding piece, B. The wheels A A are arranged one above the other in the same vertical plane, and are substantially of the same diameter. A band-saw, B, extends about the wheels A A On the shaft b are fast and loose pulleys Z) b The fast pulley may be driven by a belt, and the saw will thereby be driven.

The sliding piece B is adapted to be slid up and down in slideways formed, as here shown, by plates 0, bolted or otherwise secured to a swinging frame, C.

C designates a screw mounted at its lower portion in a fixed bearing, d, formed on the frame C. This screw engages a nut, (1', formed with or secured to the lower end of the sliding piece B. This screw extends upwardly, and, as here shown, into a longitudinal cavity or recess formed in the back of the sliding piece. By turning a hand-wheel, B, keyed to the shaft 0, the screw may be rotated to raise or lower the sliding piece, and thus to increase or decrease the tension on the saw B.

The frame 0 is hung upon a pivot, e, extending from the frame A of the machine.

G designates a screw journaled at its unscrew-threaded portions in bearingsj on the frame A. The screw G is provided with a hand-wheel, h. The screw engages a nut, 9, arranged between down wardly-extending lugs or projections g upon the frameC at the lower end thereof. The screw extends loosely through apertures in said lugs or projections By rotating the screw G the frame 0 and the several parts mounted thereon may be swung from side to side on the pivot 6. By this means the shaft a may be moved out of a true hori zontal plane and the wheel A will be canted. The band-saw will thus be caused to travel over an inclined surface on the wheel,and will be prevented from running off. I have shown the nut r as provided with curved edges, whereby it will be prevented from binding on the screw as the lugs 9 contact with it when the frame C is being swung. A projectiomg prevents the rotation of the nut being engaged with a notch in the frame C. I may employ a set-screw, g", engaging the frame A, for looking the frame C in any position into which it may be swung.

J J J designate rollerguides for guidinga hoop-pole or other piece of wood to the saw. The rollers J J are journaled in standards j, extending upwardly from the frame A of the machine. The wood when being sawed rests upon the rollers J J. The roller J 2 is arranged vertically and is mounted in a horizontallymovable frame, J This frame is provided with a shank portion, j, extending into suit able slideways, j formed inaframe,J", rigidly mounted upon the frame A of the machine. Extending from the frame J isa rod, J. Surrounding this rod is a coil-spring, j, which latter bears at one end against the frame J ,and at the other end against a portion of the frame J. The tendency of this spring is to force the frame J and consequently the roller J inwardly in such manner that the roller will bear against the piece of wood being sawed.

The roller J therefore bears against the wood frame. At its outer end the rod is pivotally connected to one of the arms of a bell-crank lever, L, which latter is fulcrumed upon apin or stud extending from a projection, Z, on the frame A. To the other arm of the bell-crank lever is pivotally connected one end of a rod, L. A treadle, L, is pivotally connected to the rod L. When the treadle is operated, the frame J and the roller J will be moved away from the wood being sawed against the resistanee of the springj' It is advantageous to be able to move the roller J bodily away from the wood being sawed, for the reason that it is not desirable when sawing certain kinds of woodsuch, for instance, as hoop-polcs-that the saw should out too thin where knots or defects occur in the Wood, and by moving the roller away from the wood opportunity is afforded for guiding the wood by hand in such manner as to cause the saw to out only at the desired thickness.

The roller J, I have shown as having beveled ends, whereby water which may be used to prevent gumming of the saw will be defiected, and not lodge about the bearings, causing rust.

From the hollow portion of the shaft extends a transverse opening, 8. Oil poured into the hollow within the shaft will escape through the opening 3 and lubricate the shaft and the roller. Said roller is loosely mounted, as here shown, upon a shaft, 0. This shaft is in the frame J.

frame and at the other with a fixed portion of the machine, a treadle for causing the movement of the said frame and guide in the other direction, and a connection between said treadle and frame, substantially as specified.

2. In a sawing-machine, the combination, with a band-saw, of wheels about which said saw passes, a shaft upon which one of said wheels is mounted, a sliding piece in which said shaft is journaled, aswinging frame upon which said sliding piece is mounted, a screw for raising and lowering said sliding piece, a screw for causing the swinging of the frame, and a nut provided with curved edges for engaging said last-mentioned screw maintained in position by the frame, substantially as specified.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5388334 *Jan 25, 1994Feb 14, 1995Halsey; Thomas J.Mechanized coping saw
US20090288540 *May 20, 2008Nov 26, 2009Roger YehVertical band-saw
Cooperative ClassificationB23D55/10