IMPROVEMENTS IN FIRE PROOF DOORS AND IN APPARATUS COMBINED THEREWITH FOR MOVING THE SAME OR OTHER HEAVY DOORS
Year: 1884

page_text: PROVISIONAL SPECIFICATION,
We JOHN EDWARDS of 29 Harman Street Hoxton Cabinet Maker and ALFRED
ROGERS of 69 Stebbington Street Oakley Square Engineer both in the County of
Middlesex do hereby declare the nature of our invention for "IMPROVEMENTS
IN FIRE PROOF DOORS AND IN APPARATUS COMBINED THEREWITH FOR MOVING
THE SAME OR OTHER HEAVY DOORS" to be as follows:-
This Invention relates to improvements in the construction of fire proof doors
and in apparatus combined therewith for moving the same or other heavy doors to
and fro in order to open and close the openings or doorways to which they are
applied.
For this purpose according to our improvements we construct fire proof doors in
like manner to fire proof safes by forming them hollow or with chambers and filling
them with asbestos lime or other materials usually employed for rendering safes
fireproof.
Fire proof doors of this character being very heavy (according to our improve-
ments) we combine apparatus therewith to move them to and fro.
For this purpose a horizontal tubular passage is formed through the door from
edge to edge through the width of the door.
A three threaded or other suitable screw is introduced into this passage one end
of such screw entering into a fixed screw nut on the end of an arm fixed in a recess
in the party wall or other part of the building which arm when the door is open
enters into the horizontal passage in the door.
The other end of the horizontal screw is mounted and revolves in a support which
is fixed near the edge of the door. This support is formed with side cheeks which
carry the axes of a worm wheel and a pair of bevil wheels for giving motion to the
revolving screw the ends of the axes being formed to receive a key and crank
handle to actuate the worm and bevil wheels which are so arranged that a key can
be applied to the axis of the worm on either side of the door or to an axis in the
edge of the door at right angles to the worm motion being transmitted to the worm
through a pair of bevil wheels.
The worm on the transverse axis takes into a toothed wheel fixed on the end of
the horizontal screw so that when the screw is caused to revolve by applying the

page_text: key to either end of the transverse axis which carries the worm or the axis in the
edge of the door the horizontal screw will be drawn out of or moved into the
stationary nut and thus cause the door to move to or fro as required.
The horizontal screw may be formed in tubular sections to act telescopically
when the openings for the doors are comparatively wide.
Heavy doors of this character are supported on friction wheels or rollers the axes
of which are carried by a metal frame the central part or division of which descends
into a groove in the floor and serves as a guide when the door is moved to and fro
another guide being arranged at the top of the door. A flange formed on the
underside of the door, between the wheels or rollers, enters the grooves in the floor
and serves to close the space between the bottom of the door and the floor. Other
flanges may be formed on the door to serve for a like purpose.
The apparatus for moving the doors to and fro may be applied to heavy doors of
every description and may be so arranged as to move fire proof or other heavy
doors vertically in place of horizontally as previously described.
A great advantage, resulting from our improvements in moving, heavy doors to
and fro is that they can be moved into a recess formed in the party wall or other
part of a building the edge of the door coming flush with the edge of the wall
which thus serves to screen the door on both sides when it is out of use.

page_text: JUMI LIELE
We, JOHN EDWARDS of 29 Harman Street Hoxton Cabinet Maker and ALFRED
ROGERS of 69 Stebbington Street Oakley Square Engineer both in the County of
Middlesex do hereby declare the nature of our invention: for "IMPROVEMENTS
IN FIRE PROOF DOORS AND IN APPARATUS COMBINED THEREWITH FOR MOVING
THE SAME OR OTHER HEAVY DOORS" 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 improvements in the construction of fire proof doors
and in apparatus combined therewith for, moving the same or other, heavy doors to
and fro in der to open and close the openings or doorways to which they are
applied.
For this purpose according to our improvements we construct fire proof doors in
like manner to fire proof safes by forming them hollow or with chambers and filling
them with asbestos lime or other materials usually employed for rendering safes
fireproof.
Fire proof doors of this character being very heavy (according to our improve-
ments) we combino apparatus therewith to move them to and fro.
For this purpose a horizontal tubular passage a¹ is formed through the door a
from edge to edge through the width of the door as represented in Figures 1 and 2
of the drawings annexed Figure 1 being a vertical elevation partly in section of a
fireproof door a (with the front plate removed) Figure 2 being a horizontal section
shewing the mechanism for moving the door to and fro.
Figure 3 is a transverse section and Figure 4 an edge view of the door a.
A three-threaded or other suitable screw b is introduced into this passage one end
of such screw entering into a fixed screw nut c on the end of an arm c¹ fixed in a
recess in, or to the party wall or other part of the building which arm c¹ when the
door a is open enters into the horizontal passage a¹ in the door u.
The other end of the horizontal screw b is mounted and revolves in a support b¹
which is fixed near to the edge of the door a. This support b¹ is formed with side
cheeks 63 which carry the axes of the worm e and a pair of bevil wheels d d for
giving motion to the revolving screw b the ends of the axes being formed to receive
a key and crank handle to actuate the worm e and bevil wheels d d which are so
arranged that a key can be applied to the axis of the worm e on either side of the
door a or to an axis d' in the edge of the door a at right angles to the axis of the
worin e motion being transmitted to the worm through the pair of bevil
wheels d, d.
The worm e on the transverse axis takes into the worm wheel b³ fixed on the end
of the horizontal screw b so that when the screw b is caused to revolve by applying
the key to either end of the transverse axis which carries the worm e or to the axis
in the edge of the door a the horizontal screw b will be drawn out of or moved into
the stationary nut c and thus cause the door a to move to or fro as required,

page_text: The horizontal screw b may be formed in tubular sections to act telescopically
when the openings for the doors are comparatively wide.
Heavy doors of this character are supported on friction wheels or rollers f, f. the
axes of which are carried by a metal frame f¹ the central part or division of which
descends into a groove in the floor and serves as a guide when the door a is moved
to and fro another guide g being arranged at the top of the door a.
A flange
formed on the underside of the door between the wheels or rollers f. f. enters the
grooves in the floor and serves to close the space between the bottom of the door
and the floor. Other flanges may be formed on the door a to serve for a like
purpose.
The apparatus for moving the doors to and fro may be applied to heavy doors of
every description and may be so arranged as to move fire proof or other heavy
doors vertically in place of horizontally as previously described.
A great advantage resulting from our improvements in moving heavy doors to
and fro is that they can be moved into a recess formed in the party wall or other
part of a building the edge of the door coming flush with the edge of the wall
which thus serves to screen the door on both sides when it is out of use.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what.
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