US25492A - Device fob steadying logs in sawmills - Google Patents

Description

UNITED STATES PATENT OFFICE.

RILEY DOTY, OF CARDINGTON, OHIO.

DEVICE FOR STEADYING LOGS IN SAWMILLS.

Specification of Letters Patent No. 25,492, dated September 20, 1859.

To all whom 'it may concern.'

Be it known that I, RILEY DoTY, of Cardington, in the county of Morrow and State of Ohio, have invented certain new and useful Improvements in Sawmills; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon. l

My invention relates to a mode of sustaining` the log in a steady position upon the carriage, during the process of'sawing.

In the annexed drawings Figure l represents a side elevation. Fig. 2 is a plan view. Fig. 3 is a perspective view of a portion ot one of the frames for sustaining the log.

In the figures A, represents the frame of the mill, upon which the log carriage B, is placed and operated. The carriage B, moves backward and forward upon the said frame A, in the usual manner, and is provided with a head block C, and a tail block D.

F, F, are two small frames which are secured upon frame A, under the carriage. These small frames consist of two uprights, (d), both of which are provided with journals n, n, which rest and work in suitable journal bearings. These two supports are connected together by means of crosspieces (I), and above these crosspieces, by means of rollers, a, a.

'11, c', represent cords which are secured to the frames F, F, by means of links m, m, said cords pass over pulleys, c, c, and have attached to their lower ends weights J, J.

H, is a spring which has a shoulder on it at c, and which is provided with a block ai which is triangular, forming an inclined plane on the spring as seen. When a log is placed upon the carriage with its ends resting upon the head and tail blocks it is supported at two intermediate points by the rollers, a, a, the tops of the rollers being in line with the tops of said blocks. Wrhile the carriage stands in the position in whichl it was when the log was placed upon it, the trame F, is borne down by the head block C, and remains in an inclined position under said block until the carriage commences to move. As the carriage moves the head block leaves the frame F, which is immediately raised to a perpendicular position by means ot' the cord c and weight J, and acts as a support for the log. As the log progresses, both rollers stand under and support it until the tail block strikes the inclined plane 0c, on spring H. As said block passes over the inclined plane the spring H, is borne down and the frame F is free to be acted upon and pressed down out of the way of the saw by the said tail block. The frame F, falls toward the saw but is placed at such a distance from it that it will not strike or come in contact with it.

Vhen the frame F', stands in an erect position the shoulder c stands on one side of the cross bar I, while the inclined plane a?, stands on the other side, presenting a shoulder to the said cross bar, so that the frame is kept rmly in a standing position until it is borne down by the tail block. The advantages of this arrangement are very greatin sawing long logs, or small logs, as without the supports between the blocks, at each end of the log, it is apt to sway up and down with the motion of the saw, and sometimes great damage ensues. By means of these supporting rollers the log is kept securely in its place, and is always properly supported.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is- The employment of the adjustable frames F, F', provided with journal bearings a, a, and with rollers a, cz, the same being operated in one direction by means of the head and tail blocks and in the opposite direction by means of a cord and weight, one of said frames being stationed as described by a spring H, provided with a shoulder c and an inclined plane -the whole being arranged substantially as and for the purpose specied.

RILEY DOTY.

Witnesses HENRY STINER, E. HEALEA.

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