A New or Improved Combined Mitre Cramp and Saw Holder.
Year: 1894

page_text: Date of Application, 26th Oct., 1894
Complete Specification Left, 12th July, 1895-Accepted, 17th Aug., 189h
PROVISIONAL SPECIFICATION.
A New or Improved Combined Mitre Cramp and Saw Holder.
We,
JOSEPH HAMPTON and JOSEPH HAMPTON LIMITED, all of King's Hill,
Wednesbury, in the County of Stafford, Tool Manufacturers, do hereby declare the
nature of this invention to be as follows:-
The said invention consists of a mitre cramp the parts of which are constructed,
combined and used in the manner hereinafter described, whereby a simple and
efficient mitre cramp is produced. Parts of the said mitre cramp may also be used
as a holder or cramp for holding saws while being sharpened as hereinafter
described.
In constructing a mitre cramp according to the said invention we use a base plate
fixed to the work bench, the said base plate having at one side a vertical upright or
cheek which constitutes the fixed cheek of the guide for the saw used for cutting
the mitre. Carried by the said fixed cheek and projecting over the base plate, is a
horizontal arm in which a vertical clamping screw works by which screw the strip
to be mitred is clamped to the base plate. The collar carrying the clamping
screw is capable of rotation on the supporting arm so that the clamping screw can
be turned into a horizontal position for the purpose hereinafter described.
In the middle of the base plate is an adjustable angle rest the sides of which make
a right angle with each other. This rest is for the purpose of determining the angle
of the strip to be mitred, the strip bearing against one or other side of the angle
rest according as a right or left hand mitre is to be cut. The middle of the lower
part of the fixed upright or cheek of the base plate is cut away for the passage
through it of the end of the strip to be mitred so as to bring it under the saw guide.
The sides of the cut away portion of the fixed cheek have the same inclination
respectively as the sides of the angle rest fixed on the base plate. The saw guide
consists of the fixed vertical cheek hereinbefore referred to and an adjustable
cheek parallel to the fixed cheek. The said adjustable cheek of the saw guide is
supported near its ends in front of the fixed cheek by two yoke like brackets secured
to the inner face of the fixed cheek. Those ends of the yoke like brackets situated
in front of the adjustable cheek carry adjusting screws which take into screw boxes
projecting from the front of the adjustable cheek. By means of the adjusting
screws of the yoke like brackets, the adjustable cheek can be separated the required
distance from the fixed cheek of the saw guide.
In using the mitre cramp the strip to be mitred is placed against one or other
side of the angle rest on the base plate and the end of the strip pressed against the
inclined side of the opening in the fixed cheek and under the saw guide and in this
position it is clamped to the base plate by the clamping screw. A hand saw being
introduced between the parallel cheeks of the guide the end of the strip is cut or
mitred by the motion of the saw in the ordinary way. The distance apart of the
cheeks of the saw guide is such that the saw works freely between them.
The mitre cramp described is used for holding saws while they are being sharpened
in the following manner.
The saw to be sharpened is introduced between the parallel cheeks of the saw
guide which now acts as a holder or cramp, the teeth of the saw protruding from
the top of the said holder.

page_text: The adjustable cheek being advanced by its screws towards the fixed cheek the
saw is bound or clamped between them and is then sharpened in the ordinary way.
In order that the clamping screw of the mitre cramp may not obstruct the
sharpening file, the said clamping screw is turned from its clamping or vertical
position into a horizontal position.
Dated the Twenty-sixth day of October 1894.
We, JOSEPH HAMPTON, and JOSEPH HAMPTON LIMITED, all of King's Hill,
Wednesbury, in the County of Stafford, Tool Manufacturers, 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:-
The said invention consists of a mitre cramp the parts of which are constructed,
combined and used in the manner hereinafter described, whereby a simple and
efficient mitre cramp is produced. Parts of the said mitre cramp may also be
used as a holder or clamp for holding saws while being sharpened as hereinafter
.described.
In constructing a mitre cramp according to the said invention we use a base
plate fixed to the work bench, the said base plate having at one side a vertical
upright or cheek which constitutes the fixed cheek of the guide for the saw used
for cutting the mitre. Carried by the said fixed cheek and projecting over the
base plate, is a horizontal arm in which a vertical clamping screw works by which
screw the strip to be mitred is clamped to the base plate. The collar carrying the
clamping screw is capable of rotation on the supporting arm so that the clamping
screw can be turned into a horizontal position for the purpose hereinafter
described.
In the middle of the base plate is an angle rest the sides of which make a right
angle with each other. This rest is for the purpose of determining the angle of
the strip to be mitred, the strip bearing against one or other side of the angle rest
according as a right or left hand mitre is to be cut. The middle of the lower part
of the fixed upright or cheek of the base plate is cut away for the passage
through it of the end of the strip to be mitred so as to bring it under the saw guide.
The sides of the cut away portion of the fixed cheek have the same inclination
respectively as the sides of the angle rest fixed on the base plate. The saw guide
consists of the fixed vertical cheek herein before referred to and an adjustable
cheek parallel to the fixed cheek. The said adjustable check of the saw guide is
supported near its ends in front of the fixed cheek by two yoke like brackets
secured to the inner face of the fixed cheek. Those ends of the yoke like brackets
situated in front of the adjustable cheek carry adjusting screws which take into
screw boxes projecting from the front of the adjustable cheek. By means of the
adjusting screws of the yoke like brackets, the adjustable cheek can be separated
the required distance from the fixed cheek of the saw guide.
In using the mitre cramp the strip to be mitred is placed against one or other
side of the angle rest on the base plate and the end of the strip pressed against the
inclined side of the opening in the fixed cheek and under the saw guide and in this
position it is clamped to the base plate by the clamping screw. A hand saw being
introduced between the parallel cheeks of the guide the end of the strip is cut or
mitred by the motion of the saw in the ordinary way. The distance apart of the
cheeks of the saw guide is such that the saw works freely between them.

page_text: The mitre cramp described is used for holding saws while they are being
sharpened in the following manner.
The saw to be sharpened is introduced between the parallel cheeks of the saw
guide which now acts as a holder or clamp, the teeth of the saw protruding from
the top of the said holder.
The adjustable cheek being advanced by its screws towards the fixed cheek the
saw is bound or clamped between them and is then sharpened in the ordinary way.
In order that the clamping screw of the mitre cramp may not obstruct the
sharpening file, the said clamping screw is turned from its clamping or vertical
position into a horizontal position.
;
Figure 1 of the accompanying drawing represents in perspective; Figure 2 in
plan Figure 3 in front elevation, and Figure 4 in back elevation, a combined
mitre cramp and saw holder constructed according to this invention; Figure 5.
represents a cross section of the same taken through the clamping screw and angle-
rest; Figure 6 represents a cross section of the same taken through one of the yoke
brackets, and Figure 7 represents a horizontal section taken through the fixed
cheek of the saw guide or saw holder, and exhibits the construction of the inclined
bearing sides of the opening in the fixed cheek.
The same letters of reference indicate the same parts in the several figures of
the drawing.
We will first describe the apparatus as used as a mitre cramp.
a is the base plate fixed to the work bench, the said plate having at one side the
vertical upright or fixed cheek b for the saw guide; c is the clamping screw by
which the strip to be mitred is clamped to the base plate. The said clamping
screw is carried by the swivelling or rotating collar c on the end of the supporting
arm d fixed to the cheek b so that the said clamping screw can be turned from the
clamping position Figures 1 and 5 into the horizontal position indicated in dotted
lines in Figure 4 when the apparatus is to be used as a saw holder. The
construction of the swivelling collar carrying the clamping screw c will be
understood by an examination of Figure 5; e is the angle rest at the middle of
the base plate a.
It will be seen that the sides of this rest make a right angle
with each other and the strip to be mitred bears against one or other side of the
said angle rest according as a right or left hand mitre is to be cut. The middle.
of the lower part of the fixed cheek bis cut away at 63 and the extended
sides of the opening have the same inclination respectively as the sides
of the angle reste on the base plate (see Figure 7). The saw guide between
which the saw works to mitre the strip on the cramp consists of the fixed
vertical cheek and the adjustable check f paralled thereto. The adjustable
cheek of the saw guide is supported near its ends in front of the fixed cheek >>
by the two yoke like brackets g, g secured to the inner face of the said fixed
cheek. The ends of the yoke like brackets in frout of the adjustable cheek f
carry the adjusting screws h, h which work in screw boxes in the said brackets,
the plain inner ends of the screws working in circular holes in the adjustable cheek.
By advancing the screws, by a screw driver, into or withdrawing them from their
screw boxes, the adjustable cheek can be separated the required distance from
the fixed check 6 of the saw guide as will be understood by an examination of
Figure 6.
In using the mitre cramp, the strip i to be mitred is either placed against the
inclined side of the opening in the fixed cheek band against the corresponding
side of the angle rest e, or against the other inclined side of the opening band
corresponding side of the angle rest as indicated in dotted lines in Figure 7,
according as a right or left hand mitre is to be cut, and the strip is clamped to
the base plate a by the clamping screw c as seen in Figure 5, and the hand saw
being introduced between the parallel cheeks bf of the guide, the end of the strip
under the saw guide is mitred or cut by the said saw in the ordinary way.
In using the apparatus as a saw holder during the sharpening of the saw, the
clamping screw c is turned into the horizontal position indicated in Figure 4 and.

page_text: the parallel cheeks b, f, which now act as a holder or clamp, are opened or
separated sufficiently to introduce the saw to be sharpened between them, the teeth
of the saw protruding from the top of the holder. The adjustable cheek f is now
advanced towards the fixed cheek b, by turning the adjusting screws h, h in the
proper direction, when the saw is bound or clamped hetween the two cheeks and its
teeth may be sharpened in the ordinary way.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that
we claim as the said invention :-
The new or improved combined mitre cramp and saw holder herein before
described and illustrated in the accompanying drawing; that is to say, the
combination with the base plate supporting the angle rest of the mitre cramp of a
fixed upright or cheek the inclined sides of an opening in which have the same
inclination respectively as the sides of the angle rest for determining the angle of
the mitre to be cut, the said fixed cheek carrying a swivelling or rotating clamping
screw and being used in combination with an adjustable cheek of the kind
described and illustrated for forming the saw guide of the mitre cramp and also for
forming a clamp or holder for holding a saw while being sharpened, the several
parts being constructed and combined substantially as described and illustrated.
Dated the 9th day of July 1895
JOSEPH HAMPTON.
JOSEPH HAMPTON LIMITED,
WILLIAM HAMPTON,
Director.
JOSEPH HAMPTON.
JOSEPH HAMPTON LIMITED,
WILLIAM HAMPTON,
Director.