US286201A - Carriage-feeding device for saw-mills - Google Patents

Description

(No Model.)

0. S. HUTGHINSON.

CARRIAGE FEEDING DEVIOE FOR SAW MILLS.

No. 286,201. Patented Oct. 9, 1883.

N. PETERS, Phowumo m hur. wmin m, I16,

Units Srarns Plarnsrr tries.

CARRIAGE-FEEDING DEVICE FOR SAW-Mime.

SPECIFICATION forming part of Letters Patent No. 286,201, dated October 9, 1883.

T at whom it may concern.-

Be it known that I, OLIVER S. HUTCI-IINSON, a citizen of the United States, residing at New LenoX, in the county of Berkshire and State of Massachusetts, have invented new and useful Improvements in Carriage-Feeding Devices for Saw-Mills, of which the followingis a specification.

This invention relates to improvements in the carriagefeeding devices of circular sawmills, the object beingto reduce and simplify the number of parts of such devices, whereby the carriage is moved in both directions through the instrumentality of a single pulley, combined with peculiarly-operating mechanism for governing the movements of said pulley.

In the drawings, forming part of this speeifieation, Figure 1 is a plan view of a Saw-mill embodying my improvements. Fig. 2 is a side elevation, partly in section; and Figs. 3,

4, and 5 are detail views.

In the drawings, A indicates the frame of the husk. i i are the string-pieces, and i are the head-blocks, of the carriage. t is the rack. c is the main shaft. Bis the driving-pulley. o c are cone-pulleys. c and w are connectingbclts. a and it are feedshafts. 3/ and D are feed-pulleys. z is an idler. 0 is ahand-lever.

00 and d are arms on lever 0. box for shaft a.

The carriage string-pieces t of this machine consist of wrought-iron continuous strips of double T shape in cross-section, instead of wooden pieces, as ordinarily made, whereby greater rigidity and durability of the carriage are obtained. Said string-pieces are united by the iron head-blocks The usual rack, t, is secured to the lower edge of one of pieces 'i, and a pinion on the end of shaft a engages with said rack.

The shaft a is suitably supp ortedin the husk, and has the pulley D secured to its inner end. Said pulley D is provided with a deep groove, as shown, and with a bearing-face on each side of said groove. The belt e, running from the pulley h on the main shaft 0, revolves pulley D in one direction when caused so to do by the operator. A shaft, 91., is located on said n is a movable husk, and has one end extending over said pulley D, and having a bearing in a verticallymovable box, m, said shaft'n having fixed Application filed April 17, 1883. (No model.)

thereon the pulley y Said pulley 2 has a rib, 4, projecting from its face, and said, rib and the parts 3 of the face of said pulley each side of rib 4 are adapted to bear jointly on the face of pulley D and in the upper part of the groove therein. such depth that the passage of belt 6 around it when pulleys 3/ and D are in contact is not interfered with. Conepulleys '0 v are placed on shaft 0 and on shaft a, whereby diiferent degrees of speed may be given to the latter. A hand-lever, 0, is pivoted beneath pulleys y and D, and has thereon an arm, (1, bearing on its end the idler z, adapted to be operated against belt 6 to tighten it. A Second arm, 00, of curved form, passes through an aperture 2 (shown in dotted lines in Fig. 5) through the box m, supporting the end of shaft a, near which pulley g is fixed. Said box in is adapted to be moved upward, carrying the end of shaft 02 and pulley y with it, when lever'o is swung toward it, causing said box to ride on arm 00, and to-be allowed to drop when lever 0 is swung from it.

The operation of my improvements is as follows: WVhen thecarriage is to be started to feed toward the saw, lever 0 is moved to the position shown in Fig. 2, drawing arm :rthrough the aperture2 in box in, and letting the latter, the end of shaft a, and pulley y drop, and permitting the periphery of said pulley to bear against pulley 'D, thereby rotating the latter and shaft (1. and moving the carriage, as above stated. At the same time that pulley y is allowed to drop, as just-stated, by said movement of lever 0, the idler z is, by the same movement of said lever, lifted away from the belt 6, letting the latter run Slack on pulley D, and offer no impediment. to the rotation of said pulley in a contrary direction to the movement of said belt. \Vhen it is desired to back off the carriage, lever 0 is swung toward box m, thereby raising pulley away from pulley D and forcing the idler 2 upon belt 6, and the latter then drives pulley D and shaft c in a contrary direction from that in which pulley 1 rotated it, thereby running the carriage back. Thus, bymeans of a single pulley, I), on shaft (0, capable of being rotated in two directions by pulley y and belt 0, the carriage is easily run in both directions, and the construction of the The groove in pulley D is of feed mechanism in mills of ,this class is much simplified.

NVhat I claim as my invention is- 1. In asaw-mill carriage-feeding device having suitable driving mechanism a grooved pulley on the driving-shaft having a belt, 6, running in said groove, a pulley with a rib on its face adapted to enter the groove above the belt, said pulley being mounted on a movable shaft, and shifting mechanism, substantially such as described, all the above elements in combination, so that the movable pulley may be thrown into operation and thebelt loosened,

or the pulley thrown out and the belt tight ened by shifting the parts, substantially as set "forth.

2. In a saw-mill carriage, the grooved pulley on its shaft, the belt running in said groove and connecting with the saw-arbor, the ribbed pulley on its adjustable shaft, the rib adapted to engage the groove in the first-mentioned pulley, the adj ust-able bearing operated by the hand-lever, and the belt-tightener, also operated by the hand-lever, all the elements combined, arranged, and operating substantially 25 as shown and set forth;

OLIVER S. HUTCHINSON.

\Vitnesses:

R. F. HYDE, WM. H. CI-IAIIN.

Images