A Glaziers' Window Lead Cutting Machine.
Year: 1889

page_text: Date of Application, 19th Oct., 1889
Complete Specification Left, 27th Dec., 1889-Accepted, 15th Feb., 1890
PROVISIONAL SPECIFICATION.
A Glaziers' Window Lead Cutting Machine.
WILLIAM CHARLES MINNS Plumber & Decorator Union Place Albion Road Great
Yarmouth Norfolk, do hereby declare the nature of this invention to be as follows:-
This invention consists of a machine for cutting window lead for glazier's use in the
manufacture of leaded windows, and other glazing work.
The machine consists of a steel knife firmly held between two brass plates by
screws which together form a running knife working in two grooves. Raised or lowered
by a lever. The lever with knife attached being held suspended after the cut is made
and when not in use by a steel spring.
The frame containing grooves for knife to work in is secured to base of machine by
an iron screw thereby forming centre of a kind of quadrant action by which means
the frame holding knife and lever is moved on the base and held firmly fixed in such
different positions as may be required by a split steel pin passing through opposite
holes in apron piece of frame and front of base plate.
The base consists of iron plate raised about 3 (to be firmly secured to bench by two
screws) containing sunk space to allow frame to slide under another plate which is
held in position by two screws. Such top plate being formed of iron to hold a pair of
brass jaws. One of which is firmly secured by two screws, the other jaw working
on a centre screw forms a pair which can be opened or closed as occasion may
require.
The jaws are constructed of brass with slots corresponding to the holes in front of
machine, made to fit the knife at whatever angle it may be set thereby cutting
different shapes.
The loose jaw works close upon the other which is secured and is fitted with cutting
plates of different thicknesses, secured by screws so as to enable the same jaws to take
any lead no matter whatever thickness of core, or to be easily replaced should they
become much worn.
At each end of top plate is a small wooden tray secured to such plate by screws
through holes in iron. One tray for sustaining lead while being passed in, the other
for holding lead after being cut to length.
The lead to be cut is (after cleaning fag end) to be passed in jaws whereby it is
firmly held with finger and thumb when the lever can be pressed down with other
hand thereby making a perfectly clean and fair cut without wringing or jamming the
lead out of proper shape.
By using this machine a great saving is effected in time and material and much
better work turned out than by the present method of cutting by hand.
Dated this 18th day of October 1889.
WILLIAM CHARLES MINNS.
COMPLETE SPECIFICATION.
A Glaziers' Window Lead Cutting Machine.
I, WILLIAM CHARLES MINNS, of Union Place, Albion Road, Great Yarmouth, in
the County of Norfolk, Plumber and Decorator, 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 machine for cutting window lead for glaziers use in the
manufacture of leaded window and other glazing work.
The machine consists of a guillotine knife working in vertical grooves in a frame

page_text: pivoted to a bed plate over which the said frame works in the quadrant of a circle and
is secured in any convenient position by a split pin taking into holes or recesses in the
be plate aforesaid. On the said bed plate is fixed a plate carrying a second plate
divided longitudinally to take the lead and slotted transversely to allow the knife to
pass thereinto, the transverse slots heing in a line with the holes or recesses in the bed
plate.
And in order that my invention may be more fully understood and carried into
practice, I will now proceed to describe the same with reference to the accompanying
drawings in which similar letters indicate corresponding parts.
Figure 1 is a perspective view of the machine; Figure 2 is a longitudinal section
thereof with the lever A removed; Figure 3 is a transverse section through the centre,
and Figures 4 to 8 shew details of construction.
The guillotine knife B is enclosed between two metal plates C, secured to each other
by rivets, screws, or the like D. Each plate is provided with a projection E having
an aperture F; Figure 4 shews the knife and plates in side elevation. Between the
two parallel projections E the lever A is placed and a pivot pin G is passed through
the apertures F in the plates and through the curved slot H in the lever A, shewn in
Figure 3. The lever A is pivoted at J to the standard K and the curved slot H will
cause the knife and plates to travel in a vertical line when the lever is raised or
lowered. The plates Ċ work in grooves in the standards K and L. Y is a curved
metal spring one end of which is fixed to the lever A, the other end being loose and free
to move up and down on the standard L. The spring is so bent that it tends to raise
the lever A from the standard L, the normal position of the lever and knife being
shewn in Figures 1 and 3. The frame M to which the standards K and Lare affixed
is pivoted by the pin N to the bed plate O. The bed plate is curved in the shape of
the quadrant of a circle, and the face of the bed plate is cut away equal to the
thickness of the frame M as shewn in Figure 1; the frame M may be turned on its
pivot pin N and moved over the quadrant. An apron piece P is affixed to the front
of the frame M and is provided with an aperture througli which a split pin may be
passed, and made to enter one of a series of holes R arranged around the circumference
of the quadrant for the purpose of adjusting the knife according to the angle at which
it is desired to cut the lead.
The plate S carrying the slotted plates is made flat on its under surface and
passes over the cut away portion of the bed plate 0 in the form of a bridge, so that
the frame M may pass freely under the said plate S. This plate S and the slotted
plates T and U are shewn detached in Figures 5 and 6. Figure 7 is a section of the
fixed plate T, and Figure 8 is a section of the moveable plate U. The plate 'S is
screwed or otherwise rigidly affixed to the bed plate O. The plate T is fixed to the
plate S and may be formed in one with it, the moveable plate U is pivoted at V to
the plate S and is provided with a thumb piece W for quickly opening and closing
The lead cut by this machine is of H section, and the rib is gripped
between the plates T and U. The moveable plate U is provided with a longitudinal
under flange Z parallel with its upper surface, see Figure 8, and when the plate U is
close up to the plate T as shewn in Figure 6, this flange Z closes up to the side of
the fixed plate T, leaving a groove X between the flange Z and the upper surface of
both slotted plates, which are level with each other. This groove is shown in
Figures 3 and 8 and serves to receive one of the flanges of the H section lead, the
other flange lying on the upper surfaces of the plates T and U.
the same.
Slots a are cut in the plates T and U sufficiently deep to reach to the flange Z so
that the knife passing into these slots will cut through the bottom flange of the
section lead and so make a clean cut. These slots are arranged so as to radiate from
the pin N the centre about which the moveable frame M turns. Each hole or
recess R in the quadrant is in a line with one of the slots a a, or is in such a position
relative thereto, that when the knife B is over one of the slots a a, the aperture in
the apron piece P is immediately in front of one of the boles or recesses R in the
quadrant. bb are gauges with set screws c, so that they may be adjusted longitudi-
nally according to the length of the lead which it is desired to cut off. The gauges

page_text: are pivoted to brackets d on the bed plate O and are provided with counterpoises e so
that they may be easily turned on their pivots out of position when it is required
to remove the cut lead. ff are trays to hold the lead before and after cutting.
The action of the apparatus is as follows: The bed plate O is firmly secured to a
bench or wooden block so as to be perfectly steady and the trays ff are adjusted
and fastened to the ends of the plate S by screws if desired. The moveable plate U
is now opened by turning it on its pivot V, and the lead inserted between the plates T
and U, the rib of the lead being vertical i.e. between the plates, and the flanges
horizontal. The plate U is now closed up to the rib of the lead. The meeting line
of the plates T and U is so arranged that there will be no undue pressure on the end
nearest the pivot, i.e. the meeting line is not radial with pivot V, the lead will thus
be fairly held the whole length of the plates T and U, the top flange of the lead
lying on the slotted plates and the bottom flange lying on the flange Z of the move-
able plate U. The frame M is then moved over the quadrant until the knife is over
the desired slot a when the pin Q is passed into the corresponding hole or recess R.
The gauge or gauges are now set, the lead moved into correct position, the moveable
plate U held in position by placing the thumb on the thumb piece W and the lever A
is then depressed. The knife cuts through the lead and enters the slot, when the
power is removed from the lever A the spring Y returns it to its initial position. The
gauge is then pushed aside and the lead moved along between the slotted plates and
a fresh piece cut off and so on.
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 :-
11
(1) The combination of a guillotine knife B working in vertical grooves in
standards K and L fixed to a frame M moving over a quadrant, with fixed and
moveable plates T and U having slots a radial with the pivot N of the moveable
frame M constructed and operating substantially in the manner and for the purpose
herein before set forth and illustrated in the accompanying drawings.
(2) In a machine for cutting lead of H section the fixed plate T and moveable
plate U each having slots a radial with the centre N around which the cutting knife
revolves, operating substantially as and for the purpose herein before described and
illustrated.
(3) The combination of the various parts forming my improved machine for
cutting lead of H section, operating substantially as described and illustrated.
Dated this 27th day of December 1889.
CASTLE SMITH,
Per F. W. Golby,
"Invention" Office, 54, Fleet Street, London, É.C., Agent for the Applicant.