Machine for Cross Grooving Staves for Vats or other Circular Wooden Vessels.
Year: 1895

page_text: Date of Application, 22nd May, 1895-Accepted. 22nd June, 1895
COMPLETE SPECIFICATION.
Machine for Cross Grooving Staves for Vats or other Circular
Wooden Vessels.
JAMES BARR, Engineer, Johnstone, of the Firm of John McDowall & Sons,
Engineers, Walkinshaw Foundry, Johnstone, Renfrewshire, Scotland, 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 which relates to a machine for cross grooving staves for vats or
other circular wooden vessels, has for its object the cross grooving of the staves to
receive the bottoms of the vats or other circular wooden vessels, the bottom of the
cross grooves in the staves being circled or hollowed out to suit any required
diameter.
In order that my invention may be fully understood, and readily carried into
effect, I will now proceed to describe the drawings hereunto annexed.
Figures 1 & 2 are respectively a front and a side elevation of a machine
constructed according to and constituting my present invention.
Figure 3 is a plan of the same.
At
In carrying my present invention into practice I provide a bed A, at the end of
which is a table B, upon which the stave S to be cross grooved is laid upon, and
fixed rigidly thereto, by means of a cramp screw C. The bed A, has at its centre
a slide, upon which a carriage D, is free to travel backward and forward by means
of a handwheel P, and rack and pinion, or other contrivance.
This sliding
carriage D, carries a cross-shaft E, upon which a rocking frame F, oscillates.
one end of this frame F, is a spindle G, driven from an overhead or other shaft,
carrying a cutter-block H, with cutters or saws for cutting out the cross grooves
in the staves. At the other end and at the same distance from the centre of
oscillation, a template pulley I, is attached by means of a stud sliding in a vertical
slot in rocking frame F, which arrangement gives a means of regulating the depth
of groove to be cut.
This pulley I, rests on a circled template J, the radius of
which corresponds to the radius of the bottom of the rat or other circular wooden
vessel for which the staves are being grooved. This template J, is fixed to the end
of the bed A, in a ready manner for easy removal, so that other templates of any
radius may be used as required. This pulley I, is kept in constant contact with
As the
the template J, by means of the weight K, on end of rocking frame F.
carriage D, is moved forward or backward, the end of the rocking frame F, carrying
the cutterblock H, is depressed or raised according to the position of the pulley 1,
on the circled template J, thus circling er hollowing out the staves as the revolving
cutterblock H, passes over same.
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. The general construction and combination of parts constituting the machine
for cross grooving the staves for vats or other circular wooden vessels, all operating
substantially as herein set forth with reference to the annexed drawings.
2. The horizontal rocking frame F, with cutterblock H, at one end, and the
adjustable pulley I, at the other end, the centres of these two portions being equi-
distant from the centre of oscillation of rocking frame F, all as herein set forth
with reference to the annexed drawings.

page_text: 3. The sliding carriage D, carrying rocking frame F, by means of which the
cutterblock is passed over stave when cutting or hollowing out cross-groove, all as
herein set forth with reference to the annexed drawings.
Dated this 21st day of May 1895.
JAMES BARR.