AN IMPROVE- MENT APPLICABLE TO MACHINES USED FOR PLANING WOOD
Year: 1885

page_text: rianing woou.
33
I WILLIAM BLACKETT HAIGH of Globe Works Oldham in the County of
Lancaster Engineer do hereby declare the nature of my invention for "AN IMPROVE-
MENT APPLICABLE TO MACHINES USED FOR PLANING WOOD and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
The object of this invention is to combine with that class of machines used for
planing wood wherein rotary cutters are employed, an apparatus for grinding and
sharpening such cutters in the most simple and economical manner.
The invention consists principally in combining with a wood planing machine of
the description referred to, an emery grinding wheel of a discoidal, cylindrical
cup-shaped, or other form suitable for grinding the blades or cutters employed,
by fixing such emery grinding wheel upon the end of the cutter shaft, whereby
the necessity for employing a separate grinding machine is obviated and a
considerable economy of cost is effected.
In connection with this emery grinding wheel I prefer to employ a suitable
carriage for holding the blade or cutter against the emery wheel such carriage
being mounted upon a slide and caused (either automatically or by hand) to
traverse across the face of the emery wheel, but the exact construction of this
carriage and traversing slide forms no part of my present invention.
In the annexed drawing Fig. 1. is a side elevation and Fig. 2. a plan view of a
rotary cutter wood planing machine with my invention shown as applied thereto.
a, a is the framing of the wood planing machine b, b is the rotary cutter and
c, c is the cutter shaft. Upon one end of this shaft I fix an emery grinding
wheel d, d of a suitable form for grinding the blades or cutters employed in the
machine.
Upon a bracket e, e (cast with the framing a, a) is supported a slide ff on
which is mounted a carriage g, g worked to and fro by means of a traversing
rack h, h and fitted to hold the cutter or blade i, i at the proper angle and to
traverse it to and fro against the face of the grinding wheel d, d. The device for
holding and traversing the cutter or blade against the surface of the grinding
wheel may be of any suitable construction and may be made to work automatically

page_text: or by hand, and as before mentioned this device forms no part of my invention,
and I do not wish to confine myself to the use of this or any other particular
device for this purpose.
Neither do I claim as new, nor wish to confine myself to the use of, the
particular form of rotary wood planing machine shown on the drawing, as my
invention is equally applicable to other forms of wood planing machines having
rotary cutters.
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 combination with a wood planing machine (of the "rotary cutter" type) of
an emery grinding wheel of suitable shape for grinding the cutters or blades
employed; such grinding wheel being fixed upon the end of the rotary cutter
shaft, substantially in the manner and for the purposes hereinbefore particularly
set forth.
GEORGE DAVIES,
Agent for the Applicant,
4, St. Ann's Square, Manchester.