Improvements in Templets used in Stave-jointing Machines.
Year: 1890

page_text: Date of Application, 28th Jan., 1890-Accepted, 8th Mar., 1890
COMPLETE SPECIFICATION.
Improvements in Templets used in Stave-jointing Machines.
EDWARD EVERSFIELD WHITEHEAD, 2 Ridley Road St. Margarets Rochester County
of Kent, Engineer, 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:-
My Invention relates to improvements in templets used in stave jointing or stave
shaping machines, and by the use of which much time is saved.
The usual method and machine, as is well known in the profession consists of a
framework of metal or other suitable material with an adjustable clamp, fitted on to
the bed or face of a stave jointing machine, and in which the staves to be shaped are
placed edgeways, the said framework or carriage being caused to travel to and fro' on
the face of the machine by suitable means.
Revolving cutters fixed on a rising and falling bar beneath the top surface or face
of the machine rotating at a high speed, the cutting edges of the cutters projecting
sufficiently above the surface while rotating as to plane, or give a curved formation to
the edges of the boards or narrow widths of wood placed in the aforesaid framework
or carriage, and caused to give the requisite shape to the edges of the said boards or
staves, by reason of the bar or shaft on which the cutters are fixed, having a rising
and falling motion imparted to it by means of a vibrating lever having a weight or
weights on one of its ends. One end of the cutter bar having a small pulley fixed
thereon, by which the said bar is rotated. A roller fixed on a short independent
shaft revolves in the same bearing as the inner end of the cutter bar, and bears on the
upper curved edge of a templet formed from a flat plate of metal, and bolted to a flat
bar, fixed to hangers or plates of metal attached to the travelling framework or
carriage.
When the carriage has travelled the length of its stroke in its forward direction,
reversing gear causes the said carriage to return in the opposite direction, which
return stroke or travel when completed is sufficient for the cutters to form the
required curve on one side or edge of the staves, the staves are then taken from
the carriage and their former top edges placed downwards, so as to be shaped by
the cutters in like manner.
When it is required to shape or curve the edges
of another class or length or width of stave the machine has to be stopped several
nuts removed, and the templet reversed, or another templet adjusted and bolted in
position, which method involves a great loss of time.
15
My Invention consists in forming a templet with two or more webs, the outer edges
of which are differently curved, one end of the templet has a plain circular circum-
ference, which when the carriage has travelled so far, that the roller rests on same,
permits the templet to be turned in bearings so as to get differently curved edge
for another class or set of staves, of a different width, thus it will be seen a great
deal of time and labour is saved.
In order that my Invention may be more readily understood and explained in detail
I have hereunto annexed a sheet of Drawings on which letters of reference are marked
on corresponding parts on all the Figs. alike.
DESCRIPTION OF DRAWINGS.

page_text: Fig. is a plan of the same.
Fig. is a side elevation of one hanger with bearing attached in which my
improved templet is revolved when substituting one curved edge for another.
Fig. 6 is an end view of that end of the templet so shaped that it may by means
of a key, spanner or other appliance be easily rotated, so as to put the required
curved edge into position for use.
In these Figs. a is the ordinary or flat shape of templet, attached by bolts and
nuts a² to a flat bar a³, which is bolted to hangers b, by which it is attached to the
travelling carriage c, bolts and nuts c² being used for adjusting the said templet.
In Figs. 3, 4, 5 and 6. c is the carriage or framework in which the staves to be shaped
or curved are tightly held by means of a clamping bar d adjusted by means of screw d³,
the bar e on which cutters are fixed is rotated by means of a strap or band passing around
the pulley e fixed on its outer end, the cutters being caused to give the required shape
or curve to the edges of the staves by means of a roller es being caused to follow the
curve of the templet edge f. by means of a weighted lever g pivotted at one end and
vibrating in bearings attached to the under side of the surface of the machine.
The said roller e³ is fixed to an independent shaft, one end of which is fixed in the
same bearing as the inner end of the cutter bar e, the carriage c having its backward
and forward motion imparted to it by the toothed gearing ². It will be seen in
Figs. 3 and 4 that my improved templet is supported in bearings attached to
hangers by which it is fixed to the side of the travelling carriage c. A tie bar i
may be used to prevent the hangers to which the hearings are attached from
shifting, bolts and nuts 2 being used for adjusting the templet f. When the said
roller ³ rests or bears on the plain circumference f³, fitted on, or fixed to one end
of the templet f, the said templet can be rotated in its bearings f2 so as to place the
required curve in position for use in an easy and efficient manner.
Having now particularly described, and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that
what I claim is :-
The construction of a wood or metal templet to be used in or on stave jointing
machines, having two or more webs radiating from a centre, the outer edge of each
web being differently curved, the said templet having a metal shaft at each end, by
which the said templet is supported in bearings, on one or both of which said shafts a
circular wood or metal roller having a plain circumference is fixed, or fitted on inde-
pendently of the said webs, the outer end of the said shaft or shafts being shaped in
such a manner that the said templet can be rotated, and adjusted by means of screws
or bolts when required, in the manner and for the purpose as herein substantially
described, set forth and fully illustrated in the drawings hereunto annexed.
Dated this 28th day of January 1890.
GRAHAM & GRAHAM,
Agents for Applicant.