An Improved Hand Tool or Saw for Wood Working.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
An Improved Hand Tool or Saw for Wood Working.
I, WILLIAM BORRER Junior of Pakyns Manor, Hurstpierpoint, in the County
of Sussex, Gentleman, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a novel form of tool adapted for cutting holes or for
shaping pieces of a curved or round, or partially curved or round shape in or of
wood or other material capable of being cut by a saw, and it consists of a bracket
adapted to be pivotted to the piece of wood to be cut and carrying a sliding block
adapted to be actuated vertically by means of a screw. This sliding block carries
a transverse bar capable of adjustment with respect to the said block, and the
said bar carries at one end a handle and a quadrant shaped piece adapted to carry
the cutter which consists of a piece of sheet steel of either a Hat or slightly curved
shape and having saw like teeth on its bottom edge. This cutter is capable of
being bent to any desired curvature by means of an engaging band and adjustable
screws. The teeth of the cutter may be of any desired shape and its operating
face is preferably slightly curved so that the teeth bear first at or about the centre
of its length.
To enable the cutter to clear itself the teeth may be set as in an ordinary saw,
or the plate of which the cutter is made may be slightly thicker at the centre of
its length than at its ends and for the same purpose I find it useful to also cut teeth
on the front and back edges of the plate.
It will be understood that the bar carrying the cutter is adjustable with respect
to the sliding block mounted in the pivotted bracket so that the radius about which
the cutter moves can be regulated according to the radius of the curve or circle
it is desired to cut and it will be obvious that the cutter must also be bent to the
said radius.
On the top of the pivotted bracket is mounted a looso cap which when the tool
is in operation is adapted to be held by one hand while the other hand works
the cutter backwards and forwards to effect the desired work.
A convenient method of pivotting the tool to the piece of wood to be out is to
form a countersunk hole through the base plate of the bracket to receive an
ordinary wood screw. When this is placed in the hole a false block is inserted in
the bracket to engage with the saw cut of the said screw so as to prevent it rotating
aud it is then screwed down into the wood by rotating the tool. After the screw
is screwed home the false piece is removed so as to allow ae sliding bracket
carrying the transverse bar on which the cutter is mounted to be lowered as the
cutting is effected.

page_text: I, WILLIAM BORRER, Junior of Pakyns Manor, Hurstpierpoint, in the County
of Sussex, Gentleman, 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 relates to a novel form of tool adapted for cutting holes or for
shaping pieces of a curved or round, or partially curved or round shape in or of
wood or other material capable of being cut by a saw, and it consists of a bracket
adapted to be pivotted to the piece of wood to be cut and carrying a sliding block
adapted to be actuated vertically by means of a screw. The sliding block carries
a transverse bar capable of adjustment with respect to the said block, and the
said bar carries at one end a handle and a quadrant shaped piece adapted to carry
the cutter which consists of a piece of sheet steel of either a flat or slightly curved
shape and having saw like teeth on its bottom edge. The cutter is capable of
being bent to any desired curvature by means of an engaging band and adjustable
screws. The teeth of the cutter may be of any desired shape and its operating
face is preferably slightly curved so that the teeth bear first at or about the centre
of its length.
In the accompanying drawing which illustrates this new tool:-
Figure 1 Sheet No. 1 is a view in plan.
Figure 2 Shoet No. 1 is a view in elevation partly in section on line z z
Figure 1.
Figure 3 Sheet No. 2 is a view in end elevation showing the cutter, and
Figure 4 Sheet No. 2 is a view in end elevation showing how the tool is fixed
to the work.
Throughout the views similar parts are marked with like letters of reference.
The tool consists of a light metallic bracket or frame A adapted to be pivotted
on its vertical centre liue to the piece of material to be cut. In this frame is
mounted a block B adapted to slide vertically therein. The block B is actuated
by a screw C mounted in the top of the frame A and threaded into the said block.
The screw C carries a milled flange D, or its equivalent, by which it can be rotated
to vary the vertical position of the block B in the frame A, and is extended
upwards beyond the said flange to carry a loose cap E by which the tool can be
steadied by the hand when in use. In the block B is mounted a bar F which
carries the cutter G. This bar which is preferably of a square section is adjustably
fixed to the block B by any suitable device such as a pair of set screws aa as
shown in Figures 2 and 4 of the drawings so that the radius about which the
cutter moves can be regulated according to the curve or circle it is desired to cut.
On the one end of the bar F is mounted a bracket H adapted to carry the cutter G
nud also a handle J for operating the tool. The cutter G which consists of a thin
sheet of steel having saw-like teeth on its cutting edge is clamped to the bracket H
by means of a plate I adapted to carry the handle J. To the plate H' is fixed
a strip K of spring steel which is adapted to be flexed to any required curve
which must agree with the radius of the bar F-by means of two screw bolts k and
nuts k carried by arms h on the bracket II.
In addition to forming saw teeth on the bottom edge of the cutter, teeth-
preferably, of a finer pitch-may be formed on its sides to assist the cutter in

page_text: cutting up to a dead stop. Obviously, also the cutter may have teeth on its upper
side so that it can be reversed.
The bracket A is pivotted to the material to be cut by means of an ordinary,
wood screw X adapted to pass through a hole in the base of the bracket A. A
convenient method of screwing the screw X home is as follows:-
The screw X is inserted in the hole from the inner side of the bracket A. A
block such as Y having a knife edge such as y adapted to engage with the slot
in the top of the screw is then inserted in the bracket A so that it so engages with
the screw X, and the sliding block B is then screwed down on to it. This locks
the screw to the bracket and enables it to be screwed into (and also out of) the
material by rotating the tool. After the screw X is screwed home the block B is
raised to allow the block Y to be removed, when the tool is ready for use.
To enable the cutter G to clear itself its teeth may be "set" as in an ordinary
saw, or the plate out of which it is made may be of a slightly greater thickness at
its centre than at its ends.
In use the tool is oscillated about its pivot through the required arc, the cutter
being gradually lowered by means of the screw as the work proceeds. If a com-
plete circle is to be cut the tool is oscillated through a convenient arc and at the
same time moved gradually round the pivot.
I wish it to be particularly understood that I do not limit myself to the
precise details of construction hereinbefore described and illustrated by the accom-
panying drawing, but that I hold myself at liberty to make such changes and
alterations as fairly fall within the spirit and scope of my invention.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what I
claim is:-
(1) An improved tool for cutting or sinking circular or partially circular holes
through or in any material capable of being cut with a saw, consisting of a frame
adapted to be pivotted vertically to the material to be cut, of a block adjustable
vertically in the said frame, of a bar mounted radially in the sliding block and of
a cutter mounted on the said bar, as set forth.
(2) An improved tool for cutting or sinking circular or partially circular holes
through or in any material capable of being cut with a saw, consisting of a
frame adapted to be pivotted vertically to the material to be cut, of a block sliding
vertically in the said frame and adapted to be adjusted therein by a screw, of a bar
adjustable radially in the sliding block, of a cutter mounted on the said bar and
of an operating handle mounted on the radial bar, as set forth.
(3) An improved tool for cutting or sinking circular or partially circular holes
through or in any material capable of being cut with a saw, consisting of a
frame adapted to be pivotted vertically to the material to be cut, of a block sliding
vertically in the said frame, of a screw mounted in the frame and adapted to
engage with the sliding block, of a bar adjustable radially in the sliding block,
of a saw-like cutter mounted on the said bar and capable of being flexed thercon
to the required curve, of an operating handle mounted on the radial bar, as set
forth.
(4) An improved tool for cutting or sinking circular or partially circular holes
through or in any material capable of being cut with a saw, consisting of a
frame adapted to be pivotted vertically to the material to be cut, of a block sliding
vertically in the said frame, of a screw provided with a milled head or flange
mounted in the frame and adapted to operate the sliding block, of a bar adjustable
radially in the sliding block, of a saw-like cutter mounted on the said bar, of means
for adjusting the curve of the cutter, of an operating handle mounted on the end
of the radial bar beyond the cutter, and of a steading cap or handle mounted on
the top of the adjusting screw, as set forth.

page_text: (5) The combination of parts hereinbefore described and illustrated in the
accompanying drawings forming my improved tool.
Dated this 27th day of July 1897.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.