USRE6071E - Improvement in saw-mill dogs - Google Patents

Description

H. D. DANN.

Saw-Mill Dogs. w N0. 6,071. Reissued Sept. 29, I874.

Fife.

5 A vmmm- H VII/4mm,

w v K WIT/ 34 15).

THE .GRLPHIC CD. PHOTO-LITDLSQJ: PARK PLACE, NZY.

PATENT OFFICE.

HENRY D. DANN, OF OSHKOSH, WISCONSIN.

IMPROVEMENT IN SAW-MlLL DOGS.

Specification forming part of Letters Patent No. 134,653, dated January 7, 1873; reissue No. 6,071, dated September 29, 1874 application filed May 6, 1874.

To all whom it may concern:

Be it known that I, H. D. DANN,of Oshkosh, in the county of Winnebago and State of Wisconsin, have invented certain new and useful Improvements in Saw-Mill Dogs; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon, which form a part of this specification.

The nature of my invention consists in the construction and arrangement of a dog for sawmills, as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawing, in which- Figure 1 is a side view, and Fig. 2 a crosssection, of my device. Fig. 3is a perspective view of one of the knife-bars.

A represents the case or box, in which the knives, constituting the dog, move out and in. This box or case may either be bolted to the ordinary standard, or made solid, and form the standard, in either case receiving and protecting the knives or spurs which form the dog. It guards the knives from the knots, and also prevents the last board from springing as the knives draw the logs, boards, or scantling firmly to the standard or box. In the case or box are placed two bars, B B, which are held in the same by pins a a passing through the sides of the box and through inelinedslots b bin the bars. The opposite ends of the bars B B are, by connecting-bars C 0, connected with a cross-head, 1), which is pivoted between projecting ears on the back of the box, and provided with a lever, E, for operating the same. By the movementof the lever E in one direction one of the bars B will move up and the other down, and at the same time they will move outward toward the front of the box by the action of the inclined slots b b on the pins to a. By the movement of the lever in the contrary direction the bars B B will be moved in the opposite direction, and at the same time be moved inwardly from. the front of the box. To the front edges of the bars B B are secured the knives d d, the points of which arebent outwardly an (1 pointed, as shown. The knives of the two bars point toward each other, so that when the bars are moved outwardly the knives will enter the wood and lock together, preventing the log from slipping down or off from the end of the block, which is often the case when the log is rounded on the under side, when it is to be undogged and turned over.

The pins 01. a may pass through holes in the bars B B, and slide in inclined slots in the case or box, instead of having the slots in the bars, as above described, or the same movement of the bars may be effected by means of eccentrics.

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

1. The bars B B, provided with interlocking knives d d, and operating substantially in the manner and for the purposes herein set forth.

2. The combination of the box or case A, bars B B, with "interlocking knives d d,-inclined slots 12 1), pins a a, connecting-bars O G, cross-head D, and lever E, all constructed and arranged substantially as and for the purposes herein set forth.-

In testimony that I claim the foregoing as my own, Iaflix my signature in presence of two witnesses.

HENRY D. DANN. Witnesses:

R. PARKINSON,

GUSTAVUS PERCK.

Images