Stave-saw′ing ma-chine′.
（
Coopering.)
a. One for sawing staves from the log, bolt, or balk.
b. One for sawing the edges of staves, otherwise known as
jointing. See stave-jointing machine.
The machine (
Fig. 5587) is designed to saw staves from the bolt and
joint or impart the required bevel to their edges.
The bolt is placed on the sliding-table
C, which is advanced while the stave is cut to the required circular form by the dished saw
D. The stave is then transferred to the other end of the table, where it is held and bent between the two clamps
d e, the center being supported by the block
f. The table
F is then advanced, presenting the stave to the action of two circular saws, which are suitably inclined to impart the desired radial bevel to each edge.
The saws may be brought nearer together or separated, without altering their inclination.
by means of a lever
k, which is engaged with a rack
n to hold it in fixed position, and actuates a bell-crank arrangement which moves frames carrying the saw-spindles.
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Band-saw stave-machine. |
Fig. 5588 shows a stave machine using a band saw, which works upon pulleys in connection with adjustable feed-tables, so as to render the saw available for sawing staves for vessels of varying diameters, and also for the sawing of flat objects, such as shingles and headings.
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Ring-saw stave-machine. |
Fig. 5589 has a circular band-saw, or
ring-saw, hung upon and between friction-rollers set in a true circle, so that the saw is put in motion and driven by one of the rollers.
These rollers are set in adjustable brackets, so as to be adjusted to the circle outside as well as inside of the saw.
Fig. 5590 shows the application of the cylindrical saw to sawing staves from the bolt.
Fig. 5591 is also an application of the tub-saw, which acts upon the bolt of wood which is raised against it, the reciprocating, vibratory table, with its head-block, being pivoted at such a point as to cause the saw to cut a transverse circle on the outside of the stave to conform to the outside diameter of the barrel when completed.
The cams and flanges
Q R act against rollers on the
[
2316]
arms of the feeding-table, giving the same the necessary vibration.
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Barrel-saw stave-machine. |
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Stave machine. |
In
Hurlbut's stave-machine (
Fig. 5592), the saws are capable of being so adjusted as to give the required bevel to the edges of the staves as they are presented to the action of the saws by the forward movement of the carriage.
The angle at which the saws are set varies according to the dimensions of the barrels for which the staves are designed.
