Improvements in Tools for Rebating, Grooving, and Moulding Wood and the like.
Year: 1888

page_text: Date of Application, 4th Feb., 1888
Specification Accepted, 23rd Mar., 1888
Improvements in Tools for Rebating, Grooving, and Moulding Wood
and the like.
I EDWARD PRESTON of Whittall Works, Whittall Street, Birmingham, in the
County of Warwick, Tool Manufacturer do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
This Invention relates to the class of Tools known as "routers" for Improvements
in which I have filed a Specification and have received grant of Letters Patent dated
as of the 23rd day of June 1886, and numbered 8291, and consists of certain further
devices for adapting such tools to the purposes of rebating, grooving, and moulding
the margins of the circular, oval, or other shaped openings for the insertion of mirrors,
medallions, panels, or photograpic pictures, in brackets picture frames and other
articles, generally known as Amateurs Work.
It is also applicable to grooving for inlaying, or bevelling or otherwise working,
the outer margins of similar articles. As such tools have to operate round small
openings or curves, I make the tool in accordance with this Invention some four or five
inches long only, and instead of with handles after the manner of a spokeshave, I raise
upon the plate forming the face of the tool two ear shaped wings rising sufficiently
high to be conveniently taken hold of and firmly held by the thumbs and fingers.
Any slipping may be prevented by depressions or openings with rounded edges, formed
in or through the lower part of the said ear shaped wings. These wings do not project
beyond the face of the fool, and by them I can obtain a sufficiently powerful drawing
action for the work required for such purposes as above mentioned.
The bracket forming the bed for the cutting irons rises from the front of the face
of the tool between the two ear shaped wings, the whole forming a light frame of iron
or other metal. At the back of the bracket is a recess, equal to half the width of the
face of the tool, for the reception of the cutting irons. The latter are secured by the
usual thumb screw which passes freely through the bracket, and engages with a back
plate which fits into the recess, the bottom of the said plate being level with, and
completing the face of the tool.
The slots in the cutting irons for the passage of the thumb screw, I prefer to make
open to the top, so that the irons can be slipped in and out without removing the
thumb screw or back plate.

page_text: For the purpose of cutting narrow grooves, or for inlaying, or for other purposes,
I use a narrow cutting iron of say 16 inch on the face by inch deep, more or less,
which is set crossways to the face of the tool, and to secure the same, narrow vertical
grooves are provided on the inside of the bed, and of the back plate, to the right or
the left of the thumb screw, into which the narrow cutting iron is placed so that when
set up for use the back plate is in about the same position as with the ordinary flat
cutting irons.
In rebating, a groove may be first cut, and the rebate completed with a flat cutting
iron of the desired width. An adjustable fence or gauge is fitted to the face of the
tool, of similar construction to that described in my previous Specification above
referred to. By these means any kind of moulds, bevels, or beads may be worked by
single cutting irons or by two or more following each other. In tools of this
description the cutters act more as scrapers, but the use of the term cutting iron must
be understood in this way also.
In the accompanying drawing, Figure 1, is a front elevation of a tool constructed
in accordance with this Invention. Figure 2 is a plan of the same from the underside.
Figure 3 is a cross section of the middle of the tool, and Figure 4 shows views
of the groove cutters. Similar letters of reference indicate coresponding parts
throughout.
A, A, is the face of the tool, upon which are raised the ear shaped wings a, a.
Openings or recesses a², a², may be provided as shewn, and the wings and openings so
shaped and rounded as to give a good and easy grip for the thumbs and fingers. B is
a bracket forming the bed for the cutting irons b, and carrying the thumb screw c.
The body of the tool so far is made by preference in one light casting of iron or other
metal, but stampings or forgings may be used. is a recess in the frame of the tool
for the cutting irons, which are secured or held in any position for use by the back
plate c², with which the thumb screw engages as shewn. The lower side of the
back plate is formed to correspond with the general cross section of the face of
the tool. shews the open slot in the flat cutting irons enabling them to be easily
fixed and changed. The narrow cutters for cutting grooves are shewn in front view
at and b, and in side view at 6, in Figure 4. The mode of fixing same (in place
of the ordinary flat cutting irons) in the vertical grooves c', et, in the bed and in the
back plate, or in one or either of them will be readily understood. D is the adjustable
fence or gauge with set screw d (engaging with wormed holes d³, d) and with recess d³
for partly masking the cutting irons when required. The configuration of the working
edges of the cutting irons may obviously be adapted to any kind of moulding.
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 1
claim is :-
1. The construction and use of a "Router" or tool for the purposes hereinbefore
described, made with car shaped wings a, a, or with equivalent devices for operating
same instead of with outside handles, substantially as and for the purposes hereinbefore
described and set forth:
2. The construction and use of "Routers" adapted either for the use of flat cutting
irons, or for the use of cross cutting irons, the latter held when in use in the
grooves c c and secured by the fastening c c³, common to both, substantially as and
for the purposes hereinbefore described and set forth.
T
1000