US129620A - Improvement in head-blocks - Google Patents

Description

W. TAUNEY. Improvement in Head-Blocks.

N0. 129,620. I Patented July 16, 1872-.

Fig.1. I

Fig. 2.

WITNESSES.

" e e INVENTOR.

PATENT OFFICE.

WILLIAM TAUNEY, OF JEROMESVILLE, OHIO.

IMPROVEMENT IN HEAD-BLOCKS.

Specification forming part of Letters Patent No. 129,620, dated July 16, 1872.

To all whom it may concern:

Be it known that I, WILLIAM TAUNEY, of J eromesville, in the county of Ashland and State of Ohio, have invented a new and valuable Improvement in Head-Blocks; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawing is a representation of a vertical section, and Fig. 2 is an end view of my invention.

This invention has relation to saw-mills and consists in the construction and novel arrangement of devices for regulating the movement of the head-block, as hereinafter fully described.

Referring to the drawing, A represents the shaft holding the pinions by which the headblock is moved. B B are bearing-blocks, having journal-boxes b, through which said shaft passes. 0 represents a large-sized ratchetwheel secured to the shaft A between the blocks B B. E represents a lever having a yoke, F, with collars F to encircle the shaft on either side of the ratchet-wheel. F is a dog or pawl, pivoted between the arms of the yoke above the ratchet-wheel. When the lever is moved the wheel is turned in one direction by the action of the pawl. A similar pawl, F pivoted between the sides of abracket, F attached to the blocks B, also engages with the ratchet-wheel, but only to prevent a reverse movement. The shafts or pins G of the pawls F are each constructed with a dovetailed projection, g, and hold a weighted lever, 9 having a corresponding dovetailed projection, 9 The levers g are used for raising and lowering the pawls, and for holdin them in'position by their weight. The dis-.

tance of the movement of the head-block is in accordance with the distance to which the ratchet is turned, and consequently is regulated by the pitch of the lever E. One arm of the yoke F is'furnished with two horns, H H, curved concentrically, or nearly so, to the wheel, and cut to bevel corresponding to the radiuses of the wheel. The horn H strikes the correspondingly-beveled top of the curved bracket F when the lever is thrown or moved in the direction proper to operate the ratchet. This horn prevents the pawl from striking said bracket. The horn H limits the reverse movement of the lever by coming in contact with the surface of one of the steps of a concavo-convex gauge, I. By this gauge the distance which the ratchet will be moved will be regulated. The gauge consists of a plate curved toward the lever, and provided with a flanged base, J, arranged to slide lengthwise through a channeled guide, K, supported at the ends of the blocks B. The upper edge of said gauge is cut to an inclination or bevel of any desired pitch, and a series of steps, a, formed thereon, equal in number to the teeth of the ratchet. These steps are properly numbered or designated, and serve to regulate the pitch of the lever to any desired degree, the gauge being adjusted to the proper position. M represents a hand-wheel for turning the shaft A back after a log has been cut.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The adjustable gauge-plate I, having the steps a, in combination with the lever E, substantially as specified.

2. The curved bracket F holding the pawl F in combination with the lever E, horn H, ratchet C, and pawl F substantially as specified.

In testimony that I claim the above, I have hereunto subscribed my name in the presence of two witnesses.

WILLIAM TAUNEY.

Witnesses:

JOHN WILsoN, JOHN W. SNYDER.

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