Improvements in Door Springs and Checks.
Year: 1894

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883), as required by
the decision of the Law Officer of the 4th day of March 1896.
Date of Application, 3rd Oct., 1894
Complete Specification Left, 11th June, 1895-Accepted, 3rd Aug.,
1895
PROVISIONAL SPECIFICATION.
Improvements in Door Springs and Checks.
We, WALTER ALFRED GILL, of Arthur Street West, London Bridge, London,
Ironmonger and PHINEHAS EDWARD AYTON, of the Firm of Thomas Pemberton
and Sons, of Livery Street, Birmingham Brassfounder, do hereby declare the
nature of this invention to be as follows:-
Our invention relates to door springs and checks, or to a combined door spring
and pneumatic check.
The spring consists of a vertical barrel or hollow casing, having enclosed within
it, a coiled or other spring, with one end attached to the barrel or its axis and the
other end to a fixed part, which may be brackets which carry the spring and are
secured to the upright or style on the hinge side of the door framing.
Attached to the barrel part, or to that part which turns, and compresses and
winds up the spring, or closes the coils thereof, is a double-armed bracket, or a
bifurcated arm, directed horizontally, and with the outer end parts transversely
intersected by a pivot or pin, having a roller or runner, which runs upon a race
plate secured to the door, threaded upon its middle.
.
Now this pivot or pin also takes through the branchos of the bifurcated
outer end or head of a piston rod, hetween which branches the roller or runner
comes and works, whilst the inner end of the piston rod carries a cup leather or
other piston, which works within a trunk cylinder, that is, a cylinder open at one
end and closed at the other, with a piston rod taking and working through the open
end. This trunk cylinder, whose closed end is provided with a screw or other
regulator, for regulating the escape of air, and comes between the arms of the
double armed bracket, is fixedly secured to a door in the same horizontal plane as
the bracket, by screws or otherwisc.
Thus it is understood that the piston rod is connected to the terminal ends of the
double armed bracket, by the pivot or pin carrying the runner, so that as a door
opens, the double armed bracket, and with it the piston rod, is made to take a
greater radius than the trunk cylinder, in consequence, in one case, of the bracket
turning upon the door frame as a centre of motion and, in the other case, of the
door carrying the cylinder turning upon the hinges.
By fully opening the door, the piston is made to traverse from the closed end to
the open end of the trunk cylinder, and at the same time air gets to the back of the
piston, either partly by passing in at the back of the cup leather, and partly through
the regulator, or through a check valve in the piston, so that assuming that an
equilibrium is established within the cylinder, and that the piston is at the mouth of
its open end, and that the spring within the barrel is wound up, then on the
releasing of the door, the motive force of the spring created by the winding up, is

page_text: delivered out through the arms to the door, which immediately starts closing, and
as the piston approaches the back of the cylinder, it cushions the air between itself
and the said closed end, hence the check, and as the air thus pent up can only slowly
escape through the regulator, after the check has been put on, then the door slowly
approaches the jamb.of the door.
Instead of the barrel spring having a double arm, it may bave only a single arm,
which may come upon one side, or, when it is desired to come central, be cranked to
.clear the cylinder.
Dated this 90th Santember 1894
.
We, WALTER ALFRED GILL, of Arthur Street West, London Bridge, London,
Ironmonger and PHINEHAS EDWARD AYTON, of the Firm of Thomas Pemberton
and Sons, of Livery Street, Birmingham, Brassfounder, 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 :-
...Our invention relates to door springs and checks, or to a combined door spring
and pneumatic check.
The spring may consist of a vertical barrel or hollow casing, having enclosed
within it, a coiled or other spring, with one end attached to the barrel or its axis and
the other end to a fixed part, which may be brackets which carry the spring
and are secured to the upright or style on the hinge side of the door framing.
Attached to the barrel part, or to that part which turns, and compresses and
winds up the spring, or closes the coils thereof, is a double-armed bracket or a
bifurcated arm, directed horizontally, and with the outer end parts transversely
intersected by a pivot or pin, having a roller or runner, which runs upon a race
plate secured to the door, threaded upon its middle.
Now this pivot or pin also takes through the branches of the bifurcated outer end
or head of a piston rod, between which branches the roller or runner comes and
works, whilst the inner. end of the piston rod carries a cup-leather or other piston,
which works within a trunk check cylinder, that is, a cylinder open at one end and
...closed at the other, with the piston rod taking and working through the open end.
This trunk cylinder,, whose closed end is provided with a sorew or other regulator,
for regulating the escape of air, and comes between the arms of the double armed
.. bracket, is fixedly secured to a door in the same horizontal plane as the bracket, by
screws or otherwise.
I
Thus it is understood that the piston rod is connected to the terminal ends of the
double armed bracket, by the pivot or pin carrying the runner, so that as a door
opens, the double armed bracket, and with it the piston rod, is made to take a
greater radius than the trunk cylinder, in consequence, in one case, of the bracket
turning upon the door. frame as a centre, of motion and, in the other case, of the
door carrying the cylinder, turning upon the hinges.
By fully opening the door, the piston is made to traverso, from the closed end to
the open end of the trunk cylinder, and at the same time air gets to the back of the
piston, either partly by passing in at the back of the cup leather, and partly through
the regulator, or through a check valve in the piston, so that assuming an equilibrium
is established within the cylinder, and that the piston is, at, the mouth of its open
end, and that the spring within the barrel is wound up, then on tho releasing of the

page_text: door, the motive force of the spring created by the winding up, is delivered out.
through the arms to the door, which immediately starts closing, and, as the piston
approaches the back of the cylinder, it cushions the air between itself and the said
closed end, hence the check, and as the air thus pent up can only slowly escape
through the regulator, after the cheok has been put on, then the door slowly
approaches the jamb.
Figure 1 of the accompanying drawing represents a combined door spring and
check constructed and arranged according to my invention.
Figure 2 represents a longitudinal vertical section of the same, the full lines
representing the positions which the parts assume when the door is closed and the
dotted lines the position of the combined spring and check when the door is partly
opened.
Figure 3 represents a section of the check upon the dotted lines.
Figure 4 represents the bifurcated end of the piston rod separately.
Figure 1.
Figure 5 represents the inner or spring attachment end of the double bracket.
The same letters of reference indicate corresponding parts of the Figures 1 to 4
of the drawing.
a is a barrel or hollow casing, baving enclosed within it, a coiled spring a', whose
ends are attachedly connected to forked pegs a³, a³, fitted in the said barrel, one of
which pegs is made fast to the attachment framing a' affixed to the door frame c, by
screws, and the other made fast by a pin to the lower joint eye ³, of the double-
armed bracket b, the fore ends of the arms b', of which have a cross pin 6³, to which
the ends of the branches d, of the bifurcated end d', of the piston rod d, having a
piston d³, at its inner end, are jointedly connected. Coming between the branches d³,
and freely turning upon the pin b³ is a runner or roller e, taking its bearing upon a
race plate f, attachedly connected to the hinged door g.
is an air check or trunk cylinder, closed at its back end h', provided with a
regulating valve h³, and having an open front A, whilst the said trunk cylinder is
secured or made fast to the door by brackets i, ².
The piston rod is provided with guides i, for steadying its movement in the
cylinder.
Instead of the barrel spring having a double arm, it may have only a single arm,
which may come upon one side, or, when it is desired to come central, be cranked
to clear the oylinder.
Figure 6 represents a barrel spring having a single arm such as described.
a is the barrel, containing a spring and secured to the door style c, by a bracket a*.
e is the roller secured to the end of the arın by a pin 6³, carried by the arm b. dis
the bifurcated end of the piston rod d, working within a trunk or check cylinder ½,
secured by brackets i and, to the hinged door g.
We wish it to be understood that we do not limit ourselves to the kind of spring
described, as other forms may be employed with a like, or nearly the same,
effect.
We are aware of the Specification granted to Robert Adams No. 4447 of 1886,
and we make no claim to the combinations therein described.
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 we
claim is :-
First. In combined door springs and checks, jointedly connecting the outer end
of the piston rod to the outer end of an armed bracket by a cross pin upon which a
roller, bearing upon the door, runs, substantially as described and set forth.
Secondly. In combined door springs and checks, the combination with a cylinder
or a trunk or check oylinder secured fast to a door, of an armed bracket, whose
outer branched end or ends is or are connected to the outer end of the piston rod by
a cross pin or equivalent upon which a roller or runner bearing upon the door, runs,
substantially as described and set forth.
Thirdly. In door springs or combined door springs and checks, employing in

page_text: connection with the spring or barrel, a double armed bracket, with the fore end
provided with a runner or roller, substantially. as described and set forth.
Fourthly. The construction, arrangement and combination of the parts. of
combined door springs and checks, substantially as described and set forth.
Dated this 10th day of June 1895.
WALTER ALFRED GILL,
PHINEHAS EDWARD AÝTON,
By Henry Skerrett,
24 Temple Row, Birmingham, Agent for Applicants.