US391643A - Shingle-sawing machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

W. J. PERKINS.

-SHINGLE SAWING MACHINE.

No. 391,643. Patented O t. 23, 1888.

(No Model.) 2 SheetsSheet' 2,. W. J. PERKINS.

. S-HINGLE SAWING MAGHINE.

No. 391,643. Patented Oct. 23, 1888'.

\VILLTS .T. PERKINS, OF GRAND RAPIDS, MICHIGAN.

SHINGLE SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 391.6%3. dated October 23, 1888.

(No model.)

To all whom it may concern.-

Be it known that I, W ILLIS J. PERKrNs, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in ShingleSawing Machines, of which the following is a specification, reference beinghad therein to the accompanying drawings.

Thisinvention relates to shingle sawing machi nes; and it consists in certain improvements in the operative mechanism, substantially as hereinafter described.

The improvements are specially intended to apply to shingle-sawing machines heretofore invented by WVillis J. Perkins, but are in parts applicable to other machines.

The improvements are in the driving mechanism and in the tilt-operating mechanism.

In the drawings, Figure l is a side elevation of so much of a double block shingle sawing machine as is necessary to show the present improvements, the right end of the machine being broken away and some parts omitted. Fig. l is a side elevation of so much of the frame and carriage as is necessary to show the operation of my tilt-driving device, and shows the cam-wheel and its pawl and the end of the walking-beam in elevation. Fig. 2 is an end view of part of the frame, carriage, and walking-beam and an end elevation of the camwheel and its frictionbrake or retarder. Fig. 3 is a modified detail.

The frame and driving mechanism of the machine may be substantially such as shown in my application, No. 204,635, filed June 9, 1886, to which application reference is made for a fuller understanding of the parts not herein described and claimed.

A indicates the frame of the machine. B denotes the sideway, on which the bolt-earriage G reciprocates. G is a bracket attachment to said carriage, to which rod D is pivoted, said rod connecting to a swing-bar, E, pivoted at the center of the race-cam F, but free to move independently of said cam-wheel. The cam-wheel F has a cam-race, G, with a central star'plate, H, surrounding rim I. Between rim I and star-plate H the race G is of such width as to receive the anti-friction roll K and hold it with a practically uniform bear ing on both sides of said roll. The swing-bar as in the application referred to.

E has a pawl, L, pivoted to its outer end, in position to engage the teeth M of the camwheel. The forward movement of carriage C in the direction of the arrow moves the rod D, and thus carries the pawl into one or the other of the ratchet-tee! h. The backward movement of the carriage moves the cam-wheel by the engagement of the pawl L with the teeth M. The pawl N, pivoted to the frame, engages the ratchet-teeth to prevent the movement of the cam-wheel in reverse direction.

The friction-roll K is at the end of walking beam 0, which is pivoted to the frame at Q and carries risers, (one being shown at 1%,) which serve to tilt the table. This tilt-table is old, and equivalent mechanism for actuating the same may be substituted.

The race cam-wheel F isjournaled at its center, to rotate intermittingly under the impulse of the pawl L. At the front of this wheel and bearing on its rim there is a frictionpresser, S, which is preferably a bent spring-piece attached to the frame at T, and held toward the cam wheel by setnuts U U, engaging a threaded bolt, V, extending out from the frame. The nuts U U can be adjusted to apply any desired pressure to the face of the cam-wheel. The effect of the brake or presser S on the cam- Wheel is to check the movement thereof the in stant the pawl stops its movement. This pawl movement is so timed that the Wheel K is in the position in the camrace which is necessary to give the proper tilt to the table the instant the carriage comes to a rest in its backward movement. The friction presser S may be duplicated and applied to both sides of the can wheel. A rim may be cast and turned up on the face of the wheel to give a proper and uniform bearing.

The rod D is adj ustabl y connected to bracket G by a bolt, 0 which bolt passes through any one of the holes 0 in said bracket. Thus the rod D can be adjusted to have just such movement as will carry the swing-bar E and pawl Fj ust far enough to move the race-cam a sufiieient distance to tilt the table. The reciprocation of carriage 0 causes the ti1t-table to move. This carriage is driven by oscillating levers a, connected to wrist-pins b by slides c on. gears d, The gears d are driven by a belt and train of mechanism from the saw-arbor e. The saw-arbor eis supported in bearings, as usual in this class of machines. Usually, however, the driving-belt engages a pulley at about the point f, and in order to convey power to the machine this belt enters the frame at one side. In fact, as heretofore constructed it was impossible to carry power to the machine from the direction of the end which has the carriage-driving gear, and as the spalts, shingles, and sawdust must be separately conveyed away from the machine it was frequently a matter of much expense and inconvenience to locate the machine with reference to the engine, so thatit could be used, the prevailing practice heretofore being to place machines of this class in the second story of the mill-building. This objection I overcome by extending the arbor below the bottom of the frame A, as at g. The machine can thus be set with the main driving-pulley below the mill-floor and receive a belt from any direction, while at the same time the conveyers above the floor can be located to suit the conven ence of the particular mill in which it is desired to use the machine. The same arborboX and cross-girt heretofore used is carried down to h, and there supported on bracket tone bracket on either side of the machineand suitably fastened to the frame. The belt can thus be brought in at the end of the machine without interfering with any of the working parts or of the delivery of the shingles at the side of the machine.

In the foregoing specification I have de scribed the best mode now known to me for applying the principle of my invention; but changes, substitutions, and omissions may be made as regards subscribed parts, provided only the essential elements of invention set forth in the following claims are employed.

\Vhat I claim is 1. In a shingle-sawing machine, the combination, with the tilt-table and its oscillating lever, of a eam-whee1 in operative engagement with said lever, and a'reta'rding-brake hearing on said cam-wheel, substantially as described.

2. The combination, with the tilt-table and its walking-beam, of a cam-wheel operatively engaging said walking-beam, and an adjustable presser bearing on said wheel to operate as a brake-retarder, substantially as described.

3. The combination, with the tilt-table of a shinglesawing machine, of a lever for operating the same, a race-cam engaging said lever to move it positively in both directions, and a spring-presser bearing on the surface of said race-cam with an adjusted pressure, substantially as described.

4. In a shinglesawing machine, a frame, an arbor vertically supported in said frame and a saw thereon, a pulley on the arbor below the saw for driving the carriage, an extension of the arbor below the supporting-legs of the frame,

and a pulley on said arbor below the level of WILLIS J. PERKINS.

Witnesses:

FRANCES W. PERKINS, C. W. GEO. EVERHART.

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