Improved Cutting Heads for Wood Working Machinery.
Year: 1895

page_text: Date of Application, 28th Jan., 1895--Accepted, 4th June, 1895
COMPLETE SPECIFICATION. .
Improved Cutting Heads for Wood Working Machinery.
RICHARD RICHARDSON Bedford Village Halifax County Nova Scotia Dominion
of Canada Manufacturer 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 :-
Figs. 1 and 2 are plan and section of tongueing bead.
Figs. 3 and 4 are plan and section of grooving head.
The whole of my invention relates to the use of horizontal rotary saws for
grooving, tongueing, rabbeting, matching, jointing and moulding lumber, entirely
superseding the old style of heads with chisel cutters.
The advantages claimed are cleaner and quicker work no spawling either with
cross grained and knotty timber or hard or soft woods. Perfectly simple in the
manner of setting the saws, as an inexperienced person can fit them after once being
shown. Under the old style of heads, the chisels were liable to break or get dull,
and valuable time was lost in resetting same. The drawings show-in the grooving
head, a thin saw blade solid in centre, and a top and bottom saw set back of an
inch from cutting edge of centre blade. These saws are composed of steel collars,
dovetailed or keyed to receive movable teeth. The lower saw rests on a solid bed
plate, centre saw is placed over this, top collar over this, a washer and nut over all
and the whole made firm. The tongueing head has two steel collars, the teeth are
made to overlap, and can be fitted for a inch tongue, or larger by putting washers
between the collars.
Eight movable teeth are shown in the collars, but a lesser number may be used.
The teeth are easily kept in order by filing.
Fig. 1 is a plan of the tongueing head.
A are the steel collars top and bottom.
B, the adjustable teeth.
C, the top washer, D, the spindle, E, the nut.
Fig. 2 is a section of tonguer at line 2 2.
A the collars, B the teeth C the top washer D spindle E uut F the bed plate,
G the power pulley.
Fig. 3 is a plan of the grooving head.
A the central solid saw blade with "projection of teeth beyond the shoulder
cutters, B the upper and lower teeth, C the upper and lower collars, D the top
washer, E the spindle, F the uut.
Fig. 4 is a section of the grooving head at lines 2 2.
A central saw, B, upper and lower teeth, C upper and lower collars, D top
washer, E spindle, F nut, G bottom bed plate, H the power pulley.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :
1. In a cutter head for tongueing purposes as described in Figure 1, the steel
collars top and bottom A. the adjustable teeth B. the top washer C the spindle D.
the nut E substantially as described and shown in the drawing.
2. In a cutter head for grooving purposes the central solid saw blade projecting

page_text: beyond the shoulder cutters marked A. the upper and lower teeth B. the upper and
lower collars C. the top washer D. the nut E substantially as described and shown
in the drawing.
Dated this 3rd day of January 1895.
RICHARD RICHARDSON,
By his Attorney,
Andw. J. Cowie.