Improvements in and relating to Machines for Jointing Staves.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Machines for Jointing Staves.
I, JAMES PLEUKHARP, a citizen of the United States of America, residing at
No. 80 West Third Avenue, in the City of Columbus, County of Franklin and
State of Ohio, one of the United States of America, Gentleman, do hereby
declare the nature of this invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
This invention relates to machines for jointing staves, and aims to provide a
stave of standard size, particularly as to width and bevel of edges.
A further object of the invention is a machine that shall always make a stave of
exactly a given measurement in width at any given point, and shall furnish the stave
with a perfect angle at all points along its edge, so that it shall always fit exactly
as an element in the barrel.
It is not my object to make this machine adaptable for jointing staves of all
kinds and descriptions. It is not intended for the jointing of staves of various
widths and thicknesses, nor for staves in wind or twisted.
By the use of staves of various widths, it is impossible to make barrels of a
standard diameter, consequently the jointing angles must vary and the jointing
cannot be done perfectly.
The same fault exists in the use of the same stave in the making of barrels of
different diameters. The differences being made up by the use of lagging placed
between the edges of the staves. Also if the staves are jointed-all of them on
one angle and then warped, the warpage will change the angle.
Now my machine is intended for jointing and by this jointing to make a perfectly
true standard stave out of sawed stock.
In the drawings-
Figure 1 is an end view showing principal elements of machine.
Figure 2 is a full side view of the machine.
Figure 3 detail end view of gearing and mechanism for operating carriage.
A, A, cutters which are slightly concaved on inner sides to give clearance.
B, B, cutter mandrels in boxes, b, b, and provided with band pulleys, b', b', and
with the lock nuts, 61, 61, for the adjustment of the cutters.
C, C, C, carriage, with stave, c', bent thereon. D, D, plate or slide on which
the carriage runs. E, and F, catches for holding stave in place on carriage,
controlled by the springs, e, and f. G, G2 G3, mechanism for bending the stave
down on to the carriage in its proper place. G¹, G, G, spring and rollers for
guiding and controlling the bending mechanism. H, gear wheels which mesh with
the teeth e, on the upper surface of the lower part of the carriage, C, serving to
operate said carriage. I, lever pivoted at, i, for throwing the clutch operating the
gear mechanism. K, and L, beveled lugs or stops operating with the
throwing clutch. J, yoke having its ends engaging with the band pulleys, R, and R',
and operated by the lever, I, to reverse or stop the movement of the machine.
M, hand lever engaging with lever, I, for throwing clutch yoke, J. N, a stop at
the end of frame to throw open the catch, F, releasing the stave. O, guide, against
which the stave springs when released by the catch, F. P, P, rollers operated by
the pulley, Q, which carry away the jointed stave from the machine. R, R', clutches
which also serve as band pulleys which operate the gears, H, H, and which are
controlled by the lever mechanisms and stops, I, N, K, and L. R, is provided with
a straight belt, R', with a twisted belt.
OPERATION OF MACHINE.

page_text: the bending mechanism, G, is brought forward against the end of the stave and
downward, grappling the stave and bending it down upon the carriage, the chamfered
end of the stave striking the beveled nose of the catch, E, it is forced back,
allowing the stave to go down, and then springs again into place by reason of the
coil spring, e, locking the stave in position, and the bending mechanism returns to
its original position. By means of the hand lever, M, the operator throws the
clutch, R, into the gear, H, operating both gears H, H, in the same direction and
drawing the carriage between the cutters. When the lever arm of the catch, F,
strikes the stop, N, it is thrown upward, releasing the end of the stave, this end
strikes the guide, O, which guides it between the rollers, P, P, which then drag
the stave out from under the catch, E, and carry it away from the machine.
the meantime the forward movement of the carriage is kept up until the beveled
stop, L, strikes the lever, I, which throws the clutch, R, out and the clutch, R', in,
thus reversing the motion of the carriage and bringing it back to the operator.
Here it is stopped by the lever, I, coming in contact with the beveled stop, K,
throwing both the clutches out of gear, and the machine is ready for another
operation.
In
The bending mechanism is composed of treadle, G³, pivoted to frame of machine,
grappling hook, G, which passes between guide rollers, G4, G4, and pitman, G³,
connecting treadle, G³, and grappling hook, G. When outer end of treadle is
depressed, lower end of grappling hook is drawn down and out, and the upper end
of said hook is carried forward and downward, thereby engaging with and
drawing down the free end of the stave to catch E.
The cutting mechanism and the provisions for moving the carriage are stationary
relative to the frame of the machine.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a stave jointing machine, the combination with the frame and the carriage
having stave retaining catches, of grappling hook, G, having a sliding and a tilting
motion, the supports, G4, to guide the grappling hook in its two-fold movement, and
the treadle connected with the said grappling hook for operating the same, substan-
tially as and for the purpose set forth.
2. The combination with the frame, and the carriage having stave retaining
catches, of the guide rollers, G4, G, on the frame, the grappling hook passing
between the guide rollers, the treadle connected with the grappling hook, and the
spring, G, for returning the treadle to a normal position, substantially as and for
the purpose described.
3. In a stave jointing machine, the combination with the frame, the stationary
cutters, and the carriage, of the mechanism, R, R' and H, for operating the carriage,
the lever, I, and the stops on the carriage for operating lever, I, and reversing the
motion of the said carriage, substantially as described.
4. In a stave jointing machine, the combination with the frame, the rollers, P, P,
for carrying the stave from the machine, the travelling carriage having retaining
catches, and the stop, N, of the guide, O, for directing the released stave between
the rollers, P, P, substantially as described.
5. A. stave jointing machine comprising the frame, stationary cutters, a carriage
having stave retaining catches, mechanism for moving the carriage, stops on the
carriage for reversing the said mechanism, bending devices for forcing the stave
down on the carriage, stop, N, for releasing the stave, rollers, P, P, and guide, O,
for directing the stave between the rollers, P, P, substantially as described.
Dated thi
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.