US559428A

US559428A - Sawmill-carriage

Info

Publication number: US559428A
Authority: US
Publication date: 1896-05-05
Anticipated expiration: 1913-05-05

Description

(No Model.)

W. M. WILKIN.

SAWMILL CARRIAGE.

No. 559,428. Patented May 5, 1896.v

SU r f Nrrnn STATES ATENT FFICE SAWMILL-CARRIAG E.

SPECIFICATION forming part of Letters Patent No. 559,428, dated May 5, 1896.

Application filed April 2,5, 1895. Serial No. 547,084. (No model.)

To @ZZ whom, t may concern:

Be it known that I, WILLIAM M. WILKIN, a citizen of the United States, residing at Erie, in the county of Erie a-nd State of Pennsylvania, have invented certain new and useful Improvements in SaWmill-Carriages; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to sawmill-carriages; and it consists in certain improvements in the construction thereof, as will be hereinafter fully described, and pointed out in the claim.

More particularly my invention relates to a set-off mechanism for sawmill-carriagest'. e., a mechanism for moving the carriage to and from the saw.

The invention is illustrated in the accompanying drawings as follows:

Figure l shows a plan of a fragment of a carriage, showing my improvements thereon. Fig. 2 is anelevation of the same parts. Fig.

`3 is a section on the line 3 3 looking from the left. Fig. 4. is an enlarged view of the friction mechanism. Fig. 5 is a section on the line 5 5 in Fig. L

A marks the carriage side; A, the crossgirths ,A2, a head-block; o, the axle-boxes; B, the axles; B', the carriage-wheels, and C the track. These parts are as commonly made.

Brackets I) are bolted on the inside of the carriage side over the axles. Studs d with collars d are passed through perforations in the brackets and secured in place by nuts d3 on top. One of the perforations, as cl2, is elongated, so the stud therein may be positioned to or fromV its companion, to take up wear of parts, hereinafter described. On the studs below the collars d are rollers d4, which are secured in place by nuts This mechanism forms what may be termed cam-posts fixed with the carriage.

On the axle just below the bracket is a sleeve E, having collar E at the inner end, preferably integral therewith, and this sleeve is fixed with the axle by means of set-screws e. Journaled on this sleeve is a frictionsleeve F, which is held in place thereon by a collar H, secured with setscrews h. A spiral cam-segment is carried by and turnswith the sleeve F, and turns between the rollers d4. The cam-segment has stops g, provided with stop cushions g', which contact the brackets and so limit the movement of the cam-segment.

It will be readily seen that as the spiral cam is turned, it being locked against side movement on the axle, it will move the carriage sidewise on the axle to the extent of the throw of the spiral cam, and so accomplish the offset movement. While I prefer the true spiral cam-segment it will be operative if perfectly fiat and set at an angle, as shown in the drawings, the only requirement being that one end of the segment be nearer the carriage side than the other.

To eifect the turning of the cam-segment, the following friction mechanism is provided At one side of the friction-sleeve there is a hollow enlargement f, in which is a frictionplate f', lined with friction material f2. Back of the friction-plate is a spring f3, the tension of which is adjusted by a screw f4. The friction formed by the plate f is sufficient to start the cam, so that when the carriage is reversed the cam is turned with the axle tothe limit of its movement. The direction of the throw of the cam is such as to move the carriage from the saw on the back or reverse movement and to the saw on the forward movement. As soon as the cam starts the sleeve F is crowded endwise against either the collar E or I-I, according to the direction the carriage is moving, and this end thrust creates a friction, which assists materially in the further movement of the cam.

Extending below the friction-sleeves .are arms F', which are connected by a connecting-rod I, so that both mechanisms are controlled to move -in unison, keeping the earriage parallel to the saw at all times.

A collar i is placed on the connecting-rod, and a throated lever J, carried by a rod j, is adapted to engage said collar. A hand-lever J' is placed on the rod j for operating the lever J. When it is desired to back the saw out of a log, the lever J is thrown against the collar 't' and held with sufficient force to overcome the friction of the offsetting mechanism and so locks the carriage against the offset movement until released.

IOO

Vhat I claim as new istively to said cam as to be contacted thereby 1o In a Sawmill-carriage, the combin ation with in its movement. the frame; and the axle thereof; of a friction- In testimony whereof I affix my signature sleeve journaled on a bearing moving` With the in presence of two Witnesses. 5 aXle, and having a hollow enlargement thereon; a friction-plate Within said enlargement; WILLIAM M. WILKIN. means of adjusting said plate; a cam-segment Ttnessesz carried bysaid friction-sleeve and cam-posts II. A. STRONG,

fixed with the carriage-frame so placed rela- J. KEESE HALLOCK.