Improvements in Shallow Grooving or Trenching Devices for Cabinet Makers.
Year: 1892

page_text: Date of Application, 27th Feb., 1892
Complete Specification Left, 28th Nov., 1892-Accepted, 31st Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Shallow Grooving or Trenching Devices for
Cabinet Makers.
I, WILLIAM WILLMETT, of No. 51, Beulah Grove, Windmill Road, Croydon,
in the County of Surrey, Carpenter, do hereby declare the nature of this invention
to be as follows:-
My invention relates to improvements in shallow grooving or trenching devices
for cabinet makers, and consists in replacing the scribing point of the ordinary
carpenter's marking gauge with one or more chisel-shaped cutters, which will, when
the gauge is traversed along the work, cut trenches or grooves adapted to receive,
if desired, any inlaid material either liquid, plastic or solid. Provision is made for
these cutters, one or more as the case may be, being longitudinally adjustable.
This invention does not confine me to the number of cutters.
Suitable bolts or locking devices are provided by means of which the cutters may
be securely held in their respectively operative positions. My invention is not
confined to working rectilinearly, but may be adapted by the combination with the
stem of the gange
of a centre or pivot, of cutting circular grooves or trenches. The
said centre or pivot is adjustable in respect of the length of the radius of the arc-
shaped grooves to be cut. The ordinary or any other equivalent devices, or any
modification thereof, for adjusting the position of either the cutters or of the centre
above mentioned may be made use of.
Dated this 27th day of February 1892.
PHILLIPS & LEIGH,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Shallow Grooving or Trenching Devices for
Cabinet Makers.
I, WILLIAM WILLMETT, of 51 Beulah Grove, Windmill Road, Croydon, in the
County of Surrey, Carpenter, 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 :-
My invention relates to improvements in shallow grooving or trenching devices
for cabinet makers.
In order that it and the best means for carrying into practical effect may be
thoroughly understood, I will now describe it and them in detail, referring in
so doing to the accompanying figures which are to be taken as part of this
Specification and read therewith.
Fig. 1 is a side elevation illustrating the use of my invention for producing a pair
of parallel narrow grooves.
Fig. 2 is an end elevation of the device illustrated in Fig. 1.
Fig. 3 is a plan corresponding with Fig. 1.
Fig. 4 is a side elevation of a slotted stem fitted with two adjustable cutters and
pivot.
Fig. 5 is a plan corresponding therewith.
Fig. 6 is a plan illustrating the production of a circular sunk bead about a
centre.
Fig. 7 illustrate various shapes of adjustable cutters of the same kind as are
illustrated in Figs. 2, 3 and 6.

page_text: a is the stem; and b, the gauge block of the well known marking gauge. The
scribing point hitherto used is replaced by a cutter of a suitable shape according to
the cross section of the groove or grooves or beads to be cut. The cutter is
adjustable for projection beyond the face of the steam and also to provide for wear
and tear being taken up, and its edge is always aligned with the stem. This
adjustability may be provided for in any convenient way. Two methods are
illustrated either of which may be adopted.
According to the method illustrated in Figs. 1, 2, 3, 6 and 7, the cutter shank e
is square in section and is received in a mortice cut through the stem u. d is a
set screw which enters the end of the stem at a right angle to the adjacent side of
the mortice into which its nose can be projected so as to enter one of a series of
holes d' in the opposite face of the shank and to hold the latter up against the
opposite side of the mortice.
e is a multiple cutter. It is held in a slot e' by means of a bolt e. There may be
a series of holes in the stem so that the position of the cutter along the stem can be
varied or more than one mounted in it.
ff are holes in any one of which a pivot y can be fixed when a circular groove is
to be cut. This is fully illustrated in Fig. 6.
The other method of providing for the adjustability of the cutters is illustrated
in Figs. 4 and 5. The cutter shank c is screwed and can therefore be moved up or
down a metal block h. This latter is held in its groove i by a set screw. There
may be a series of holes along the side of the stem to provide for the position of the
cutters with reference to each other being varied. Further, a chisel edged cutter
such as those illustrated in Figs. 4 and 5, may be made to do duty as the scribing
point of a marking gauge or to cut trenches of various widths by setting it
respectively across the stem or at an angle with it. e² is a lock nut adapted to
prevent the cutter being turned about its axis by the resistance offered to its
progress through the work by the latter.
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 combination of stem, gauge block and adjustable cutter as set forth.
2. The combination of stem, pivot and adjustable cutter as set forth.
3. The general construction of the improved device as set forth.
Dated this 26th day of November 1800
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, W.C.,
Agent for the Applicant.