US393927A

US393927A - Offset mechanism for saw-mill carriages

Info

Publication number: US393927A
Authority: US
Publication date: 1888-12-04
Anticipated expiration: 1905-12-04

Description

2 Sheets- Sheet 1..l

(Nb Modem Patented Deo.4, 1888.

/IV VEN TOI? WITNESSES: ZW

ATTORNEYS.

(No Model.) 2 Sheets-Sheet 2.

8. R-o-SENBBRG. OFFSET MEGHANISM FOR SAW MILL GARRIAG-:`.S. No. 888.987. Pax-.8111.88 Dec. 4, 1888..

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'UNITED STATES PATENT FEICE.

GEORGE ROSENBERG, OF MUSKEGON, MICHIGAN.

OFFSET MECHANISMFOR SAW-MILL CARRIAGES.

SECIFICATON forming part of Letters Patent No. 393,927, dated December 4, 18.88. h Application filed July 6, 1888. Serial No. 279,179. (No model.) i

To ail whom t may concern:

Be it known that I, GEORGE ROSENBERG, of

' Muskegon, in the county of Muskegon and State of Michigan, have'invented a new and useful Improvement in OffsetMechanism for Saw-Mill Carriages, of which vthe following is a full, clear, and exact description. i

My invention relates to an improvement in saw-mill carriages, and has for its object to provide a means whereby the log-frame and the mechanism carried thereby may be shifted bodily in a line at right angles to the line of travel by the carriage lpreparatory to gigging back; and the further 0b j ect of the invention is to provide a simple, durable, and conveniently/unanipulated device to accomplish the aforesaid end, and also to provide a device which may be readily attached to any ordinary saw-mill carriage.

The invention consists in the construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures of Areference indicate correspomlingl parts in all the views.

Figure 1 is a plan view of a saw-mill carriage having my improvement applied, the said carriage being partially broken away to disclose the track. Fig. 2 is a transverse section taken partially on the line .cc .fr of Fig. 1, and Fig. 3, is a side elevation of a portion of the rock-shaft and an end view 'of the same.

In carrying out the invention timbers 10, constituting the carriage-frame, are bolted or secured together in any suitable or approved manner, the said frame, being adapted to receive and support the ordinary head-blocks and the usual movable knees, 11. The carriage and its appurtenances are supported upon axles 12, which axles may be two or more in number, as desired, the said axles being journaled in hangers 13, secured to the under 'face of the longitudinal timbers of the carriage, as best shown in Fig. 2. The said hangers are preferably U-shaped in crosssection, and the wheels 14 are secured upon the axles intermediate of the members of the hangers. The wheels 14 are adapted to travel upon the tracks 15.

Upon the axles 12, at each side of the center, collars 1G are keyed or otherwise fastened, and adjacent to the inner member of. the hangers 13, suspended from the longitudinal side of the frame farthest from the saw, a third collar, 1S, is rigidly fixed to the axles.

Each pair of axles 12 is connected by a cross-bar, 19, the ends of which bars are adapted to encircle the said axles between the collars 16, as best shown in Fig. 1. Upon the side of the longitudinal beam of the carriage farthest from the saw a rock-shaft, 20, is journaled in boxes 21, parallel with the said longitudinal beam, two or more of which boxes may be employed. An eccentric or short crank, 22, is formed on each end of the rockshaft 20, the said eccentric faces bein g turned down when the carriage is carried back for a out.

A lever, 23, is secured to the rock-shaft 2O at or near its center, by means of which lever the said rock-shaft is manipulated. A short rod, 24, is passed centrally and transversely through the cross-bars 19, provided at each side of the said cross-bars with a lock-nut or other suitable retaining device, and having a slot produced longitudinally in the end facing the rock-shaft. The rock-shaft and the short fixed bar 24`are united by a link or connecting-rod, 25, the inner end of which rod is pivoted in the slotted end of the short fixed rod 24, the outer end lbeing' provided with an integral sleeve, 26, in which the eccentric surface of the rock-shaft is heldto revolve.

In operation, when the carriage is to be gigged back, the lever 23 is moved from the saw 17, whereby the rotation of the rock-shaft 20, through the pivoted connecting-rod 25 and the eccentrics upon said shaft, causes a tension to be exerted upon the cross-bars which are held between the central collars on the axles, so that through the medium of the wheels the entire frame 10 and all its appurtenances are drawn away from the saw, the hangers 13 sliding upon the axles. rlhe log 27 t0 be cut is thus freed from the saw and the carriage may be moved in any desired direction. Then it is desirous to throw the log into contact with the saw, the lever 23 is carried in the direction of the same, whereupon u the frame 10 slides upon the axles in direc- IOC tion ot the saw, the forward movement being limited b y the collar 1S, as best illustrated in Fig. uniform forward throw of the carriage,whereby a uniform cnt is made in the log.

It will be observed that the jointed or pivoted connection between the rock-shaft and the cross-bars ot' the axles is necessary in order that the side motion ot the eccentric faces of the rock-shaft will raise and lower the rods connecting said shat't and cross-bars.

I desire it understood that the short crank or eccentric may be otherwise located upon the shaft 20, and also that there may be as many cross-bars 1.() employed as the construction of the carriage may demand.

The rock-shaft 2() may, it' desired, be journaled inside the carriage-traine, either above or below the axle.

Havingthus described my invention, what I claim as new, and desire to secure by VLetters Patent, is-

l. In a saw-mill carriage, the combination, with the frame provided with hangers at- The collar 1S insures at all times a 2. The combination, with the frame, hangers secured to the under face of the frame, axles loosely mounted in said hangers, and

collars secured upon the axles at cach side of their center, of a rock-shaft having an eccentric face at its extremities, a cross-bar uniting each pair ot axles and retained in position by said collars, and connecting-rods pivoted to said cross-bars and engaging the eccentric faces of the rock-shaft, all combined to operlars attached to the axles at each side of their center, and a stop-collar also attached to said axles adjacent to the inner faces ot' the inner hangers, ot' a longitudinal rock-shaft having an eccentric face at each extremity, a lever secured to said rock-shaft, cross-bars uniting the said axles and retained in position by the central collars, and connecting-rods pivoted tached to its under side, and axles loosely jonrnaled in said hangers, of a longitudinal pivoted connecting-rods uniting` the said crossbars and rock-shaft, substantially as shown and described.

to said cross-bars and engaging the eccentric faces of the rock-shaft, substantially as shown and described, whereby the body of the earriage may be laterally reciprocated u-pon the axles to or from the saw, as set forth.

GEORGE ROSENBERG. 'itn esses:

J AMES OHARA, FLORENCE PALMER.