US546654A

US546654A - Sawmill set-works

Info

Publication number: US546654A
Authority: US
Publication date: 1895-09-24
Anticipated expiration: 1912-09-24

Description

(No Model.) 2 Sheets-Sheet 1. j

'0. P. COFFIN. SAWMILL SET WORKS.

No. 546,654. A Patented Sept. 24, 1895.

FIGJ- 35 8 "-Hm l Co 71270 Q ANDREW EGRAHAM. PHOTO-WHO.WASHINGTUN.D Cv

(No Model.) 2 Sheets-Sheet 2.

0. F. GOFFIN. SAWMILL SET WORKS.

No. 546,654; Patented Sept.- 24, 1895.

(Jilllw ANDREW E.GRANAM.PHOTO-UTNO.WASHINGION. D.C.

UNITED STATES PATENT OFFICE.

CHARLES F. GOFFIN, OF EAU CLAIRE, WISCONSIN;

SAWMILL SET-WORKS.

QPECIFIGATION forming part of Letters Patent No. 546,654, dated September 24, 1895. Application filed December 24, 1894. Serial No, 582,834- (No model.)

To aZZ whom it may concern.-

Be it known that I, CHARLES F. COFFIN, a citizen of the United States, residing at Eau Claire, in the county of Eau Claire and State of Wisconsin, have invented a new and useful Sawmill Set-Works, of which the following is a specification.

The invention relates to improvements in sawmill set-works.

The object of the present invention is to improve the construction of sawmill set-works and to provide simple and eifective means for positively advancing the knees at each swing or throw of the setting-lever.

A further object of the invention is to enable the swing or throw of the setting-lever to be readily adjusted for setting the knees for various thicknesses of lumber to be sawed, and to permit such lumber to be readily sawed full or scant, as desired.

Another object of the invention is to enable such means of adjustment to be readily arranged to suit different sizes of pinions of set-shafts, in order that the improvements herein described may be readily applied to any suitable sawmill-carriage.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure 1 is a plan View of sawmill set-works constructed in accordance with this invention. Fig. 2 is a side elevation of the same. Figs. 3 and 4 are detail views of the adjustable stops of the arch or ratchet. Fig. 5 is a vertical sectional view on line as w of Fig. 2. Figs. 6 to 9, inclusive, are detail views illustrating the construction of the eccentric rear stop.

Like numerals of reference indicate corresponding parts in all the figures of the drawin s.

designates a set-shaft, journaled in

bearings

2 and 3, forming a supporting-frame for the setting devices, and the set-shaft is designed to be provided with the usual pinions (not shown) for advancing and receding the knees of a sawmill-carriage. As the improvements hereinafter described are applicable to any ordinary construction of sawmill-car riage, the sawmill-carriage frame, the knees and their connections with the said shaft, together with springs or other devices for receding the knees, are not shown, as this construction is well understood in the art. A friction-wheel 4 is keyed or otherwise fixed to the set-shaft 1, and its periphery, which is smooth, is alternately engaged by inward-extending shoes 5 of a pair of oppositely-disposed clutch-levers 6, which are fulcrumed on the lowerends of depending oscillating arms 7. The clutch-levers 6 are similarly curved and are located at oppositesides of the friction-wheel 4, and they are extended in rear of the set-shaft 1, being interposed between the friction-wheel and the pair of oscillating arms 7. The lower ends of the clutch-levers are provided with outwardly-extending lugs or proj ections'8, which are rounded to form the pivots for the levers. pend from the set-shaft 1 and are provided with upward extensions 9,'and have bearing openings 10 for the reception of the shaft 1.

The shoes 5, as illustrated in Fig.2 of the accompanying drawings, extend forward from the depending arms 7, and the upper terminals of the clutch-levers are connected by links 11 with upper and lower arms of a rockshaft 12, journaled on the sides or

bearings

2 and 3 and carrying a head 13, having offset horizontally-disposed pivots 14 and 15, forming the arms of the rock-shaft. The pivots 14 and 15 are secured in pairs of upper and lower projecting cars 16 and 17, located at the terminals'of the transverse head 13. The links are provided at their forward ends with eyes or openings to receive the pivots 14 and 15, and their upper or rear ends are bifurcated and pivotally receive the upper terminals of the curved clutch-levers 6.

The rock-shaft is operated by a setting-lever 18, and when the same is swung to the right or forward the shoe of one of the clutch-levers frictionally engages the periphery of the setwheel 4and causes the same to turn to the left, and when the set-lever is thrown back the shoe of the other clutch-lever similarly engages the periphery of the set-wheel and causes the same to rotate to the 'left,whereby the set-shaft is continually rotated in a direction to advance theknees as the set-lever is oscillated back and forth.

When it is desired to recede the knees, the

The oscillatory arms 7 deshoes 5 are disengaged from the periphery of the set-wheel by eccentrics 19, pivotally mounted on the upper terminals of the extensions 9 of the arms 7, and adapted to depress the upper portions of the clutch-levers to force the shoes 5 out of engagement with the wheel 4, whereby the latter is free to rotate. This receding of the knees, when the set-wheel is free to rotate, is accomplished by any suitable arrangement of springs or the like in the ordinary manner. The eccentrics 19 are provided with handles 20 and are pivoted by bolts 21.

On the side or bearing 3 is mounted a ratchet or arch 22, having at its inner face a curved groove 23, receiving an adjustable curved bar 24, which is clamped at any desired adjustment by screws 25, and which receive adjustable rectangular collars or stops 2G. The rectangular collars 26 are provided at their inner sides with openings 27 to permit them to be moved past the clamping screws or bolts, and they form stops or teeth to be engaged by a spring-actuated lever 28 of an adjustable swinging stop 29 for limiting the forward swing or throw of the set-lever 18. The swinging adjustable stop 29 is provided at its lower end with an opening for the reception of the rock-shaft, whereby it is hingedly mounted; and its upper end is bifurcated to form a guide for the spring-actuated locking-lever 28. The locking-lever 28 has its lower end pivoted between ears 30 of the stop 29; it extends upward from the latter to form a handle, and it is held in engagement with the segmental ratchet by a spring 31, mounted in a socket of the adjustable stop 29.

The rearward movement of the set-lever 18 is limited by an eccentric-stop 32, provided with a handle 33 and adapted to increase or diminish slightly the throw of the lever to enable lumber to be sawed either full orscant, as is often necessary, as will be readily understood. The eccentric-stop 32 is preferably mounted on a disk 34, which is centrally pivoted by a bolt at a recess of the segment. As illustrated in Fig. 9 of the accompanying drawings, the upper portion of the disk 34, which projects slightly above the segment, is provided with a scale to indicate the extent of the increased or diminished throw of the set-lever, and the segment is provided with an indicator 35, cooperating with the scale of the disk. In the recess of the segment is located a circular plate 36, having an annular flange fitting in a corresponding recess of the disk 3%, and the eccentric-stop is provided with a spring-actuated pin or bolt 38 for engaging the circular plate 36 to hold the stop against accidental turning. The pin or bolt 38 is mounted in a perforation of the eccentricstop at the inner face of the latter, and is engaged by a spiral spring 39, which is held in the perforation by ascrew 40.

It will be seen that the set-works are simple and comparatively inexpensive in construction and that they are positive and reliable in operation, and that the set-shaft is continuously rotated'for advancing knees by each'swing or throw of the set-lever. It will also be seen that the clutch'levcrs may be readily disengaged from the friction-wheel to permit the knees to recede, and that the arch or ratchet may be readily adjusted to accommodate the set-lever to different sizes of pinions, as large pinions require less movement than smaller ones. Furthermore, it will be apparent that simple and effective means may be provided for slightly increasing or decreasing the swing or throw of the set-lever for enabling lumber to be sawed either full or scant, if desired.

Changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

What I claim is- 1. The combination witha set shaft, of a friction wheel fixed to the shaft, a pair of arms mounted on the shaft and depending therefrom and located at opposite sides of the friction wheel, a pair of clutch levers fulcrumed at their lower ends on the lower terminals of the depending arms and interposed between the same and the friction wheel and extending above the shaft, the shoes located at the lower ends of the levers and being rigid therewith and extending inward therefrom and arranged on the outer periphery of the friction Wheel, and mechanism connected with the upper ends of the levers, whereby the shoes are caused to engage the friction wheel alternately to produce a continuous forward rotation of the same, substantially as described.

2. In set-Works for saw-mills, the combination with a set shaft, of a friction wheel fixed to the shaft, a pair of depending oscillating arms mounted on the shaft and provided with upward extensions, the clutch levers fulcrumed on the depending arms and provided with shoes for engaging the friction wheel, means for operating the levers, and eccentrics mounted on the extensions of the arms and arranged to engage the clutch levers, whereby the shoes are held out of engagement with the wheel, substantially as described.

3. In set-works for saw mills, the combination of an arch or ratchet, a set lever, an adjustable stop for limiting the forward swing of the set lever, an eccentric stop arranged to limit the rearward swing of the same and having a centrally pivoted disk provided with a scale, and an indicator mounted on the arch or ratchet adjacent to the scale, substantially as described.

4:. In set-works for saw mills, the combination with a set lever, of an arch or ratchet provided with a curved groove, a curved bar detachably clamped in the groove and provided with adjustable teeth or stops, and a swinging stop for limiting the forward movement of the lever, said swinging stop being provided with means for detachably engaging the teeth or stops of the curved bar, substantially as described.

5. In set-works for saw mills, the combination with a set lever, of an arch or ratchet provided with a curved groove, a curved bar arranged in the groove, rectangular collars mounted on the curved bar and arranged in the groove and provided at their inner sides with openings, screws for clamping the bar to the segment, whereby the collars are retained in their adjustment, and a swinging stop provided with a device for engaging the collars, substantially as described.

6. An arch or ratchet designed for use in CHARLES F. COFFIN. Witnesses:

WM. BUSSELMAN, GERTRUDE BOSTWICK.