IMPROVE- MENTS IN METAL FRAMES FOR SUPPORTING DOORS, MORE ESPECIALLY FOR USE IN IRON SHIPS
Year: 1880

page_text: LETTERS PATENT to Henry Tonkinson, Ironfounder, and William Rockliffe,
both of Sunderland, in the County of Durham, for an Invention of "IMPROVE-
MENTS IN METAL FRAMES FOR SUPPORTING DOORS, MORE ESPECIALLY FOR
USE IN IRON SHIPS."
PROVISIONAL SPECIFICATION left by the said Henry Tonkinson & William
Rockliffe at the Office of the Commissioners of Patents on the 2nd October
1880.
HENRY TONKINSON, Ironfounder, and WILLIAM ROCKLIFFE, both of Sunderland,
in the County of Durham. "IMPROVEMENTS IN METAL FRAMES FOR SUPPORTING
DOORS, MORE ESPECIALLY FOR USE IN IRON SHIPS."
The object of our Invention is to provide a metal composite frame for doors, so
as to form one mass of metal without the use of rivets or bolts, as hitherto done to
connect the beading, rim, or other embellishment to the door frame.
To carry out our said Invention, we prepare in the usual way a wooden pattern
of the intended door frame, and from this pattern an impression is taken. This
impression forms the mould, and after the removal of the said pattern we substitute
therein an iron plate having the door opening previously cut out in the usual way.
Upon pouring fused metal in the mould box, it firmly adheres to certain parts of
the aforesaid iron plate, and thus forms a self connecting beading or rim around the
opening forming the door way. This mode of constructing metal frames for
supporting doors dispenses with the use of rivets or other similar mechanical
attachments, these means of attachments having been found in practice very
unsatisfactory.
The piece cut out of the said iron plate may be dressed up to form the door, and
hung to the door frame by any known or improved means; gaps or spaces may be
left in the beading corresponding in number, size, and position to such attachments.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Tonkinson & William Rockliffe in the Great Seal Patent
Office on the 2nd April 1881.
HENRY TONKINSON, Ironfounder, and WILLIAM ROCKLIFFE, both of Sunderland,
in the County of Durham. "IMPROVEMENTS IN METAL FRAMES FOR SUPPORTING
DOORS, MORE ESPECIALLY FOR USE IN IRON SHIPS."
The object of our Invention is to provide a metal composite frame for doors, so as
to form one mass of metal without the use of rivets or bolts, as hitherto done to
connect the beading, rim, or other embellishments to the door frame.
To carry out our said Invention, we prepare in the usual way a wooden pattern
of the intended door frame, and from this pattern an impression is taken. This
impression forms the mould, and after the removal of the said pattern we substitute
therein an iron plate having the door opening previously cut out in the usual way.
Upon pouring fused metal into the mould box it forms a groove, which contains
part of the aforesaid iron plate, and thus forms a self connecting beading or rim
around the opening forming the doorway. This mode of constructing metal frames
dispenses with the use of rivets or other similar mechanical attachments, these
means of attachment having been found in practice very unsatisfactory:
The piece cut out of the said iron plate may be dressed up to form the door, and
hung to the door frame by any known or improved means; gaps or spaces may be
left in the beading corresponding in number, size, and position to such attachments.
The accompanying Drawings show one mode of carrying out our Invention.
In witness whereof, I, the said William Rockliffe, on behalf of myself and
the said Henry Tonkinson, have hereunto set my hand and seal, this 29th
day of March, in the year of our Lord 1881.
Signed, sealed, and delivered by
the said William Rockliffe, in
the presence of.
SEPT. H. ROBSON,
PHILIP HARDCASTLE,
both of Sunderland,
in the County of Durham,
Iron Manufacturers.
WILLIAM ROCKLIFFE. (L.S.)