Apparatus for Planing, by Fixed Knife or Knives, the Upper Surface of Flooring, Lining, or other Boards, while Passing Through Wood Planing Machines.
Year: 1896

page_text: Date of Application, 9th Apr., 1896-Accepted, 9th May, 1896
COMPLETE SPECIFICATION.
Apparatus for Planing, by Fixed Knife or Knives, the Upper
Surface of Flooring, Lining, or other Boards, while Passing
Through Wood Planing Machines.
JAMES BARR, Engineer, Johnstone, of the Firm of John McDowall & Sons,
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 an apparatus for planing by fixed knife, or
knives, the upper surface of flooring, lining, or other boards, while passing through
wood planing machines, has for its object the planing of flooring, lining, or other
boards, on the upper surface while these boards are passing through wood planing
machines.
In order that my invention may be fully understood, and readily carried into
effect, I will now proceed to describe the drawings hereunto annexed.
Fig. 1 is a front elevation of the apparatus constructed according to, and
constituting my present invention, and shewing its application to a wood planing
machine.
Fig. 2 is a plan of same.
In carrying my present invention into practice I provide a plane bed or box A,
in which is fixed a suitable knife or plane iron B, having its cutting edge projecting
to the underside. Immediately over this plane box A, is placed a cross-lever C,
one end of which is fulcrumed to a bracket D, fixed to table of machine, this
fulcrum being adjustable to various heights, to suit the thickness of wood being
planed. The other end of this lever C passes between a guide bracket E, fixed to table
of machine, and has at its end a weight F hung on by means of the weight rod G.
This weight E gives sufficient pressure to keep plane bed A down on top of wood
while being planed. The lever C is so formed near its centre, so as to permit of
the free egress of the shavings from plane iron B, and also to receive the points of
the two pivot pins H & I, which are in plates J & K fixed to front and back ends
of plane box A. These pivots H & I allow plane box A to cant either way, so
that the whole surface of board is planed at one operation. The wood L to be
planed passes under the plane box A, in the direction shewn by arrow, being
propelled forward by the usual feed gear of wood planing machines.
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 apparatus
for planing by fixed knife or knives, the upper surface of flooring, lining, or other
boards while passing through wood planing machines, all operating substantially as
herein set forth with reference to the annexed drawings.
2. The cross lever C giving free egress to the shavings from plane box A, and
also the manner in which this lever C is attached to plane box A, all as herein set
forth with reference to the annexed drawings.
Dated this 8th day of April 1896
JAMES BARR.