US753973A

US753973A - Set-works.

Info

Publication number: US753973A
Authority: US
Inventors: John J Galway
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-09-28
Filing date: 1901-09-28
Publication date: 1904-03-08
Anticipated expiration: 1921-03-08

Description

No. 753,973. PATENTED MAR. s, 1904. J. J. GALWAY. SET WORKS.

APPLIOATION FILED SEPT. 28, 1901.

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No. 753,973. PATENTED MAR. 8, 1904. J. J. GALWAY.

SET WORKS.

APPLICATION FILED sap-122a. 1901.

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.No. 753,973. PATENTED MAR. a, 1904.

J. J. GALWAY.

. SET WORKS.

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UNITED STATES Patented March 8, 1904.

PATENT ()FFICE.

JOHN J. GALWAY, OF DULUTH, MINNESOTA, ASSIGN OR OF ONE-HALF TO KENNETH McDONALD, OF DULUTH, MINNESOTA.

SET-WORKS.

SPECIFICATION forming part of LettersPatent No. 753,973, dated March 8, 1904.

Application filed September 28, 1901. Serial No. 76,948. (No model.)

To all whom it may concern.-

ject in view is to apply set mechanism to sawmill-carriages in such a manner as to provide a clear deck and at the same time furnish lightness and cheapness in construction as well as simplicity and efficiency in operation.

With this and other objects in view the invention consists of a set-works for sawmillcarriages provided with means for moving logs into operative position with relation to the saw, said means being controlled by an engine mounted beneath the deck of the carriage and controlled from above the same.

It also consists in certain other novel constructions, combinations,and arrangements of parts, as will be hereinafter fully described and claimed.

In the accompanying drawings, Figure 1. represents a top plan view of the improved set-works, the deck of the carriage to which .the same is applied being broken away to disclose the construction of the parts. Fig. 2 represents a side elevation of the said setworks. Fig. 3'is a transverse vertical section taken on the line a Z) of Fig. 1.

Referring to the drawings by numerals, 1 indicates any suitable form of sawmill-carriage mounted upon suitable traction-wheels 2 and adapted to carry logs, as 3, for bringing the same into contact with a suitable saw, as 4. The log 3 is moved forward with. a step-bystep movement through the medium of a suitable knee or plurality of knees, as 5, having any preferred form of biting or gripping jaws .6, controlled by a lever 7. The knee 5 is mounted upon the upper face of the deck of carriage 1 and is held against lateral movement within a groove, as 8, in a suitable beam 9. The under face of knee 5 is provided with a suitable rack-bar, as 10, adapted to engage the teeth of a pinion 11, said pinion being mounted upon a suitable set-shaft 12. The set-shaft 12 is provided with rigidly-mounted ratchet-Wheels, as 13 13, the said wheels being adapted to be rotated by means of pawls, as 14 14, which have their free ends resting by weight upon the said wheels and engaging the teeth thereof. The opposite ends of the said pawls 14 are pivoted between parallel lugs, as 15 15, to a sleeve 16, which is rigidly secured to or formed integral with'a suitable rock-shaft, as 17. The shaft 17 finds bearings in supports 18 18, mounted upon the upper face of the 'deck of carriagel, and the said rock-shaft is provided near one end thereof with a collar,,as 19, which is'preferably keyed or otherwise secured to the said shaft and extends downwardly therefrom. The said downwardly-projecting portion of collar 19 is bifurcated, as at 20, and a pitman, as 21, is at one end pivoted between the portions of said bifurcation and has the other end, as at 22,pivotally secured to a piston-rod 23, the said pitman extending through the deck of carriage l to its pivotal point 22. The piston-rod 23 is mounted beneath the deck of said carriage 1 and is guided in its movement .by asuitable cross-head 24 and is operated within a cylinder 25 in any suitable manner. The cylinder 25 is provided with a steam-chest 26, suppliedwith live steam by'a pipe 27, leading from any preferred source of supply through a telescoping portion, as 28, as hereinafter more fully described. Any preferred form of balance-plug valve or other the steam-chest 26 for controlling the admission of steam to the cylinder 25, and said valve is itself governed by a valve-stern, as 29,which extends transversely ofcarriage labove piston 23 and pitman 21 and carries near'its free end a lug, as 29, adapted to operate within the bifurcated end 30 of a suitable bell-crank lever 32, which is" pivoted, as at 33, and has its opposite end bifurcated, as at 34, each of the bifurcated portions being apertured for the passage'of shaft 17. A suitable collar, as 35, surrounds the said shaft 17 within the arms of bifurcation 34 and slidable longitudinal thereof and carries a rod, as 36, which rod is guided through an eye 37, mounted upon collar 19, the said rod curving upwardly, as at 38, to avoid obstacles in the path of its movement and extending rearwardly past an arm, as 39. The arm 39 is provided with a collar 40 at its lower end, preferably rigidly secured to shaft 17. An arm, as 41, projects approximately at right angles to arm 39 and is formed integral therewith and carries an eye-lug, as

42, provided with a spring 43. The upper end of arm 39 is provided with any suitable grip 44, below which is provided a lever 45, which is normally held spaced from said grip by means of said spring 43, which is secured in any. suitable manner thereto. The lever is provided with an eye 46, which carries a rod-connecting member 47, which member has its opposite ends secured within an eye 48 of one arm of a bell-crank lever 49, which lever is pivoted to the outer end of arm 41, as at 50. The opposite end of lever 49 is bifurcated and apertured, whereby the rod 36 may have its free end passed therethrough, and a lug, as 51, carried by rod 36, is preferably engaged by said bifurcated portion of lever 49, whereby the operation of lever-45 will impart longitudinal movement to rod 36.

A sleeve, as 52, is loosely mounted upon shaft 17 and carries a rigidarm, as 53, which arm is preferably bifurcated and carries a pawl, as 54, provided with a suitable handle or operating means and pivoted, as at 56, the said pawl being adapted to have its free end engage the teeth of a segmental rack-bar, as 57 which is secured in any suitable manner to the upper face of the deck of carriage 1 for purposes hereinafter described.

The cylinder 25 exhausts into a suitable tube 58, which is connected with any preferred form of telescoping means, as 59, similar to telescope 28, as will be hereinafter set forth. At a suitable point intermediate the length of tube 58 and preferably near the cylinder 25, as at 60, is provided any preferred form of valve, preferably manually operated, whereby the exhaust from said cylinder may be controlled, and the said valve will act as a brake, cushioning the movement of the piston, and thereby retarding its action.

In operation the log 3 is placed against knee 7 5 and preferably arranged longitudinal of carriage 1, and the gripping means 6 are caused to engage said log, and the said knee is advanced sufliciently far to bring the end of the log into such position as to be in the same horizontal plane with the saw 4, and the carriage 1 is then advanced so that the saw will be passed through said log longitudinally thereof. The carriage is then returned to its original position, the knee 5 advanced one step, the distance of which is predetermined by the setting mechanism, and the sawing operation repeated. The telescopes 28 and 59 are arranged for supplying steam to and returning the exhaust from the cylinder 25 at any and all times without regard to the movement of the carriage 1. The advance of knee 5 for a predetermined distance is caused by the rotation of shaft 12 and its gear 11, which meshes with rack 10, the said rotation'being effected by a forward movement of one of the pawls 14. The pawls 14 are alternately thrown forward and backward by means of their pivotal engagement with sleeve 16, which is oscillated with the oscillation of shaft 17, the said shaft having a partially rotary movement imparted thereto at each stroke of piston-rod 23 and pitman 21 through the medium of collar 19. It will be seen that the pivotal ends of the pawls 14 are arranged on opposite sides of sleeve 16, whereby an alternate forward and backward movement of the same is effected, the free ends of said pawls engaging the teeth of ratchet-wheels 13 at each forward movement and slide over the same at each backward movement. The oscillation of shaft 17 and sleeve 16 by means of the piston and pitman, as above described, is controlled by means of valve-stem 29, operating the valvewithin the steam-chest 26. This valve-stem is controlled by means of lever 45, the operation of which will throw rod 36 longitudinal of shaft 17, and thereby move the bell-crank lever 32 and with it the said valve-stem and slide-valve, one stroke of the piston being effected by each movement of the said valve, and thereby one forward step is imparted to the .knee 5.

It will be seen that arm 39 and rod 36 are adapted to move with shaft 17, and the distance of such movement is adapted to be controlled by means of pawl 54, which maybe set in any one of the teeth of segmental rack 57, and when said arm comes in contact therewith it will be prevented from further movement, thus controlling the distance of advance ofthe pawls 14, and thereby the relative movement of knee 5.

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

1. A set'mechanism for sawmills comprising a carriage, kneesmoving transversely of the carriage upon its upper surface, transverse beams arranged below the level of the knees, the beams forming an engine-receiving space between them, a power cylinder longitudinally supported between the said beams, a rock-shaft mounted above the surface of the carriage, a set-shaft mounted on the upper surface of the carriage and connected with the knees, one or more ratchet-disks carried by said setshaft, arms on the rock-shaft carrying pawls for engaging and actuating the said ratchet-disks, and means carried by the rockshaft for controlling the application of pressure to the power-cylinder, substantially as described.

23A sawmill set mechanism comprising a carriage formed of side beams and cross brac-' man connecting the said rock-shaft with the said piston, and a set-shaft receiving its movement from the said rock-shaft, substantially as described.

In testimony whereof I hereunto aflix my signature in presence of two witnesses.

JOHN J. GALWAY.

Witnesses:

JAMES T; WATSON, K. A. MCDONALD.