Improvements in Iron Casements and Frames.
Year: 1891

page_text: Date of Application, 20th Mar., 1891
Complete Specification Left. 19th Dec., 1891-Accepted, 27th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in Iron Casements and Frames.
FRANK SMITH Manufacturer Deritend Bridge Works Birmingham in the County
of Warwick and JOSEPH JOHN CORBETT Ironworker Yew Tree Cottage Bourton
on the Hill Moreton in the Marsh in the County of Gloucestershire do hereby
declare the nature of this invention to be as follows:-
To make the joints and corners of casements of frames by a simple and strong
method not before used as follows:
To form and fix the corners of outside frame of casements or other iron frames
of or other possible section of iron (which will adinit of this plan).
By either pressing or sawing out the ends of each piece to be fitted together in
such special manner, as almost or entirely dispenses with the use of file in preparing
the joint, which as soon as it is cut by saw or press and placed in position is at
once rigid and perpendicular forming a much stronger angle joint than can other-
wise be made in the least time.
It can be brazed as others but it is to a great extent a complete joint directly it
is put together because it cannot be forced from its perpendicular without actually
bending the section of iron, whereas the old kind of joint depends entirely upon a
weak dovetail and rivet which the least outward pressure breaks.
We therefore claim a superiority for this invention over others.
1 1001
FRANK SMITH,
Agent.
COMPLETE SPECIFICATION.
Improvements in Iron Casements and Frames.
FRANK SMITH Manufacturer Deritend Bridge Works Birmingham in the County
of Warwick and JOSEPH JOHN CORBETT Ironworker Yew Tree Cottage Bourton
on the Hill Moreton in the Marsh in the County of Gloucestershire 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:-
To make the joints and corners of casements or frames by a simple and strong
method not before used as follows:
To form and fix the corners of outside frames and casements or other iron frames
of Lor other possible section iron (which will admit of this plan).
By either pressing or sawing out the ends of each piece to be fitted together in
such special manner as almost or entirely dispenses with the use of the file.
The joint as soon as it is cut by saw or press and placed in position is at once
locked and rigid forming perpendicular lines making a much stronger angle joint
than can otherwise be made.
It can be brazed as others but it is to a great extent a complete joint directly it
is put together because it cannot be forced from its perpendicular without actually
bending the section of iron whereas the old kind of joint depends entirely upon a
weak dovetail and rivet which the least outward pressure breaks.
The drawings may be described as follows:
Figure 1 shows section plan and elevation of two ends of outer frame.
Figure 2 two ends as Figure 1 as they appear before fixing together.
Figure 3 the complete joint as Figures 1 and 2 fixed.

page_text: Figure shows same section of outer frame with plan and elevation showing
alternative or variation of cuts and tenons.
Figure 5 two ends cut as Figure 4 ready to fix.
Figure 6 the complete joint as Figures 4 and 5 fixed,
Figure 7 showing example of further variations in the cuts and tenons.
Figure 8 two ends as Figure 7 ready to fix.
Figure 9 the complete joint as Figures 7 and 8 fixed.
Figure 10 plan and elevation showing two ends of inner frame or casement.
Figure 11 the two ends as Figure 10 ready to fix.
Figure 12 the complete lock joint as Figures 10 and 11 fixed.
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
1st. Construction of frames and casements by a new method by which the joints
are locked rigid before being riveted or brazed substantially as described and
illustrated.
Dad thin 10th
L
1001
FRANK SMITH,
Agent.