Improvements in Floor Spring Hinges for Swing Doors.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Floor Spring Hinges for Swing Doors.
We, ROWLAND HODGES, of No. 12, Frederick Street, Birmingham, in the County
of Warwick, Brassfounder, and FRANCIS JONATHAN HARLOW LILLEY, of No. 22,
Shakespeare Road, Birmingham aforesaid, Brass Worker, do hereby declare the
nature of this invention to be as follows:-
-
The said invention consists of the improvements hereinafter described in floor
spring hinges for swing doors, the said improvements having for their object to
facilitate the alignment of the swing doors and to obtain increased rigidity
between the pivot of the spring hinge and the strap plate or slipper on the door;
and further to reduce the width of the floor box of the hinge.
In constructing a floor spring hinge according to the said invention we arrange
in the outer end of the floor box of the hinge, a plate crossing the box from
side to side. The said plate has a rib or flange on its upper edge. Against
the ribbed or flanged side of the said plate we arrange a sliding pressure frame
the sides of which have grooves for engaging with the rib of the ribbed plate.
The sliding pressure frame is moved by the action of a screw passing through
screwed holes in its two sides, the ends of which screw bear against the opposite
sides respectively of the box so that the said screw has no endwise or travelling
motion. The said screw has a milled or notched collar or enlargement at its
middle to facilitate the turning of the screw. The pressure face of the pressure
frame has a tubular projection on which the outer end of the spring of the
hinge fits and in which the driver or spring compressor rod takes. Consequently
on the turning of the screw described the pressure frame is caused to slide to
one or other side of the box and thereby bring the axis of the driver or spring
compessor rod in the line desired.
In order to obtain greater rigidity between the connection of the strap or
slipper on the under edge of the door with the head of the pivot on which the
door turns or swings, we make the said head of the pivot of an oblong or elongated
figure in plan the hole or recess in the strap or slipper having a corresponding
figure to take thereon.
In order to reduce the width of the box of the floor spring hinge to a minimum,
we make the pivot end of the box somewhat wider than the body of the box in
which the coiled spring and the driver or spring compressor rod work, so as to
permit the cam plate to slide laterally the required distance when acted on by
the cam on the turning of the pivot by the swing of the door.
Dated this Twenty-seventh day of May 1898.
W. T. WHITEMAN,
Agent for the Applicants.

page_text: a
of its top edge. The pressure frame c (vertical sections of which, in planes at
right angles to one another, are shown in the detached views Figures 6 and 7)
takes against the plate b, the rib b² of which engages in the groove and constitutes
guide for the frame when the latter is adjusted in the manner hereinafter
described. The outer end of the frame c has a tubular boss or projection o¹
on which the outer end of the spring d fits and in which the driver or spring
compressor rode takes. The frame by the motion of which the alignment is
effected has a pair of ears e³, between which is a milled or notched screw nut f
a square rod g screwed on its corners passing through the ears c³, cand screw nut f
and the ends of the screwed rod g abutting against the sides of the floor box a
(see Figure 4).
The screw and rotating notched ring f may be made in one piece. In this
case the hole passing through the ears c, is screw threaded the screw turning
on the rotation of the ring or collar f and causing the frame c to travel on the said
screw ; but we prefer the arrangement of parts represented in the drawing.
When it is desired to adjust or alter the alignment of the swing door it is only
necessary to rotate or partially rotate the screw nut f when the frame c is moved,
by the travelling of the nut f on the fixed screw g, to one or other side of the
box a the driver or spring compressor rod e being turned through a slight angle
in a horizontal plane thereby changing to the required extent the position of
the head of the pivot h on which the door turns."
In order to obtain greater rigidity between the shoe i (or strap or slipper) which
is fixed on the underside of the door and the head h² of the pivot h on which the
door turns we make the head h² of an elongated figure in plan, preferably oblong,
as represented (see the detached view Figure 8) instead of square as usual and
wo make the hole in the shoe i of a corresponding figure (see Figure 9 which
represents a plan of a portion of the shoe 2).
In order to reduce to a minimum the size of the hole required for the reception
of the floor box we make the said floor box narrower than usual the width being
only that required for the box to accommodate the spring and its compressor rod
and permit of a sufficient adjustment of the pressure frame for alignment of the
swing door and we make in the sides of the said box at or near the pivot end,
recesses a², ² to permit of the side or lateral motion of the cam plate k when
acted on by the cam of the pivot h the said recesses a², a² virtually increasing
the width of the box a at or near its inner or pivot end.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed we declare that we
claim as the said invention of "Improvements in floor spring hinges for swing
doors":
First The construction and arrangement or combination of parts hereinbefore
described and illustrated in Figures 2, 3, 4, 5, 6 and 7 of the accompanying
drawing for facilitating the alignment of the swing door the said construction
and arrangement of parts consisting essentially of a frame in the outer end of
the box of the hinge in a tubular boss or projection on which frame the driver or
spring compressor rod of the hinge takes and on which tubular boss or projection
the spring fits, a guide piece for the said frame and a screw and notched screw
nut or collar for facilitating the side adjustment of the frame controlling the
axial direction of the spring and spring compressor rod substantially as described
and illustrated.
Secondly-In floor spring hinges:-making the head of the pivot on which
the door turns and the hole in the strap, shoe or slipper on the underside of the
door for engaging with the head of the said pivot, of an elongated figure, prefer-
ably oblong for the purpose of the more effectually connecting the said parts
together substantially as hereinbefore described and illustrated in the accom-
panying drawing.
Thirdly: Making the inner or pivot end of the floor box of the hinge of a