USRE5048E - Dexstnis lake - Google Patents

Description

IIL'. LANE.

Improvement in' Head-Blocks vfor Saw-Mills.V

No. 5,048. Remind sep.3,1s72.

` INVl-INTOR.v

UNITED STATES PATENT OEEIGE.

DENNIS LANE, OF MONTPELIER, VERMONT, ASSIGNR T0 HIMSELF, PERLEY P. PITKIN, AND JAMES W. BROCK.

`IMPROVEMENT IN HEAD-BLOCKS FOR SAW-MILLS.

Specification forming part of Letters Patent No. 80,491, dated July 28, 1868 reissue No. 5,0118, dated September 3, 1872.

To all whom it may concern:

Beit known that I, DENNIS LANE, of Montpelier, county of VV-ashington and State of 'Vermont, have invented a new and useful Improvement in Head-Blocks for Saw-Mills; and do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing forming part of the same, and letters of reference marked thereon.

This invention has relation to saw-mill carriages in which the slide or bar carrying the upright supports is moved across and upon the head-blocks by the action of reciprocating oblique guides iixed to-a rack-bar; and it consists in giving to the reciprocating oblique guides an oblique movement across the carriage and at the same time in the direction of its length, whereby a reduplication of said 0blique guides, running parallel withweach other and operating in succession, may be employed; in arranging the oblique reciprocating guides above and upon the head-blocks, and directly in rear ofthe slide or bar which carries the upright supports, whereby the capacity of the saw-mill is increased and the tendency to bind in the sliding knees diminished; in attaching the operating pinion, which engages with the rack of the oblique traversing frame, directly to the slide or bar which carries the upright supports 5 i-n a peculiarly-formed strap for confining the oblique traversing frame to the slidebar, whereby evenness of movement is secured with a firm bearing for the log 5 in the manner of hin ging and swivelin g the handle by which the pinion-shaft is operated, whereby the convenience of the operator is promoted; and the other improvements hereinafter referred to.

ln the accompanying drawing, Figure l represents a plan view of a saw-mill carriage with my improvement attached. Fig. 2 represents a transverse vertical section thereof.

The letter Arepresents the frame of the carriage, which may be of the usual form and construction. B indicates the head-blocks or cross-ties fixed on saidcarriage. C designates the slide-bar connecting the upright supports D, which form bearings against which the saw-log rests. To the under side of this slidebar are secured the plates E, which are provided Vwith downwardly and inwardly turned lips or iianches F to engage with grooves formed in the sides of the head-blocks, near the upper edges, thus giving to said bar a steady and even sliding' movement. G indicates obliquely-movin g frames, which are connected by a bar or rail, H, provided with a rack, T. The frames G, with their connectingbar H, are placed upon the head-blocks, in rear of the slide-bar C, and form a reciprocating sliding frame, which is guidedin its movement by the lips J L of theplates E, which lips are turned upwardly and inwardly, and lie at right angles with the lips F on the under side of said plates above mentioned. Between these lips or lianches J and L the guideframes G move when operated. Each of the frames G is provided with oblique bars N, parallel with each other and extended below the plane of the under surface of said frames to engage with the oblique grooves or notches of the head-blocks, which are preferably formed in separate pieces or blocks P P2, which are set into recesses formed in the head-blocks for this purpose. The blocks P which are furthermost to the rear are usually fixed, while the others, P2, are attached to springs R or otherwise arranged to-be susceptible of depression as'the frames Gr ride over them. With these Vwith the rack.` The frames Gr therefore move in the direction of their oblique bars N, which serve as guides to give the"frames a forward and backward movement,-and at the same time a movement in the direction of the length of the carriage. For operating the traversingrack and its guide-frames an upright shaft, V, turning in bearings in the upright post or standard W secured to the slide-bar C, is provided with a pinion, U, which engages with the rack T, so that, by turning said shaft V, the bar H with its oblique guide-frames will be moved through the guide-notches S ot' the head-blocks. For operating the ratchet-wheel 'Z of the shaft V to throw the slide-bar forward an arrangement of pawls, X Y, is provided, but this arrangement of mechanism forms no part of my present invention. For moving the shaft V to throw the slide-bar back -a gear-wheel, A2, is fixed to said shaft, within -bearin gs in the post his arranged to engage,

said shaft (32 being provided with a handle. This shaft is hung by a sleeve or collar, E2, eccentric therewith, within the standard W, so that by turning such collar the pinion B2 can be thrown into or out of connection with the main gear A2 of the vertical shaft.

The op eratin g pawls X, hereinbefore referred to, are carried by an arm, F4, which is operated by means of a handle-lever, G2, at its outer end. This handle-lever G2 is hinged to a block, H2, swiveled in the arm F4, by which arrange'- ment it not only admits of bein g swung around for use, either on the rear or on the front side ofthe carriage, as may be desired, but also has a swinging motion upon the arm F4, to which it is hung, as such arm moves toward the operator, the convenience of which is obvious. The post W consists ot' two parallel uprights, H4, connected at their upper ends by a plate, I2, on which operating devices for the vertical shaft V are arranged, and at their lower ends by a plate, J2, fastened to the slidebar C. While room is afforded for the gearwheel A2 by this construction of the standard W, the sides of the standard are at the same time braced and stiffened to secure the requisite rmness for sustaining the action of the operating parts carried by said standard. The shaft V is attached to the slide-bar C to ena- 'ble the operator to govern the operating de- N, whereby said frames are brought within narrow limits and into compact form, and weight and friction are decreased. As the oblique rack-frame follows the slide-bar up in its movement, I am enabled to attach the power-shaft with its pinion and operating devices directly to the slide-bar.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The combination, with a series of notched guides arranged in line in the same headblock, of reciprocatingframes G, having parallel oblique bars N for successive engagement with said notched guides, substantially as speciiied.

2. In a saw-mill,the arrangement of the obliquely-moving reciprocating frames G above the surfaces of the head-bloclrsand directly in rear of the slide-bar which carries the upright supports, substantially as specified. .3. The obliquely-moving reciprocating guideframe G, having a series of parallel oblique guides, N, substantially as specified.

4. The combination, with the slide-bar C, carrying' the operating pinion U of the reciprocating rack-frame, moving backward and forward with the slide-bar, substantially as specified.

5. The combination,with a slide-bar having the bearings J L, of a reciprocating frame moving on oblique guides N, substantially as speciiied.

` 6. The grooved block P and the yielding grooved block P2, arranged in line in the same Attest MAnLoN TArLnv,

ALBERT D. LANE.

head-block and successively engaged by the

Images