IMPROVEMENTS IN APPARATUS FOR CLOSING DOORS AND WINDOWS
Year: 1882

page_text: LETTERS PATENT to Robert Chapman of Patricroft in the County of Lancaster
Machinist and John Hibbert of Manchester in the same County Machinist for
an Invention of "IMPROVEMENTS IN APPARATUS FOR CLOSING DOORS AND
WINDOWS
PROVISIONAL SPECIFICATION left by the said Robert Chapman and John
Hibbert at the Office of the Commissioners of Patents on the 4th November
1882.
ROBERT CHAPMAN of Patricroft in the County of Lancaster Machinist and
JOHN HIBBERT of Manchester in the same County Machinist. IMPROVEMENTS
IN APPARATUS FOR CLOSING DOORS AND WINDOWS."
26
Our invention consists in improved apparatus for closing doors and hinged
windows.
In applying our invention to a door the door is fixed at the bottom to a shoe
which is secured to a vertical spindle. Near the middle of the spindle is fixed a
double cam and two loose tappets are fitted one above and the other below the
double cam; each tappet has a projection which rests against a part of the double
cam: to each of these tappets is secured one end of a chain. At a short distance
from the vertical spindle is a frame supporting two horizontal pivoted lévers, each
chain is attached to the long end of one of these levers, the short end of each lever
is connected by a spring to any convenient part of the frame to close the door after
being opened. The frame which supports the spindle has two projections which
ensure the door being brought back to the desired position:
The two frames and other parts are enclosed in a box and can be taken out at
pleasure without removing any bolts or screws or the box from the floor...
We apply similar apparatus to hinged windows.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Chapman and John Hibbert in the Great Seal Patent Office.
on the 4th May 1883.
ROBERT CHAPMAN of Patricroft in the County of Lancaster Machinist and
"IMPROVEMENTS 5
JOHN HIBBERT of Manchester in the same County Machinist.
IN APPARATUS FOR CLOSING DOORS AND WINDOWS.
נו
Our invention consists in improved apparatus for closing doors and hinged
windows.
In applying our Invention to a door, the door is fixed at the bottom to a shoe
which is secured to a vertical spindle: near the middle of the spindle is fixed a 1
double cam and two loose tappets are fitted, one above and the other below the
double cam: each tappet has a projection which rests against a part of the double
cam to each of these tappets is secured one end of a chain. At a short distance
from the vertical spindle is a frame supporting two horizontal pivoted lovers: each
chain is attached to the long end of one of the levers: the short end of each lever 1
is connected by a spring to any convenient part of the frame to close the door
after being opened. The frame which supports the spindle has two projections
which ensure the door being brought back to the desired position. The two frames
and other parts are enclosed in a box and can be taken out at pleasure without
removing any bolts or screws or the box from the floor.
We apply similar apparatus to hinged windows.
And in order that our Invention may be fully understood and readily carried
into effect we will proceed to describe the accompanying sheet of Drawings
reference being had to the figures and letters marked thereon.
2
Figure 1 is an elevation with one side of the box removed of our improved 2
apparatus. Figure 2 is a plan of the same with the "shoe" and cover of the box
removed and Figure 3 is an end view of the vertical spindle double cam and
tappets, the end of the box being removed.
Similar letters refer to similar parts throughout the several views.
a is a portion of the floor in which is fitted the box b containing our improved 3
apparatus: c is a vertical spindle working in bearings in the frame c': the shoe c
is secured to the spindle c and is fixed to the bottom of the door (not shown in
the drawings). Near the middle of the spindle c is fixed a double cam & upon
which are projections d² and d²: and a loose tappet e is fitted above and another
loose tappet fis fitted below the double cam d: both bored to fit the spindle: each
of these tappets has a projection e' and f¹ respectively which rest against a part of
the double cam d and also against projections g and h secured to the frame c'. At
a short distance from the vertical spindle c is the frame i which supports two
horizontal pivoted levers ; and 1: k k² are chains: one end of the chain k is
attached to the long arm of the lever j and the other end is secured to the tappet e :
in like manner one end of the chain k³ is attached to the long arm of the lever j¹
and the other end to the tappet f: the short arms of the levers ; and j¹are con-
nected to the frame c' by hooks and land springs m and m³ respectively which
bring the door back and close it after being opened.
When the door is closed the projection e¹ on the tappet e rests against the
projection on the cam d and also against the fixed projection g and the pro-
jection on the tappet f rests against the projection d' on the cam & and also
against the fixed projection h.
When the door is opened in one direction the projection on the double cam d
moves the tappet e by means of the projection e': the chain k (attached to the
tappet e) actuates the lever j and draws out the spring m: directly the pressure on

page_text: the door is taken off, the tension of the spring m operates the lever j and pulls the
door back into position, thus closing it: the projection e' comes in contact with the
projection g thus stopping the tappet e and preventing the door from swinging
back too far.
When the door is opened in the other direction the projection d' on the double
cam & moves the tappet f by means of the projection fi: the chain k¹ (attached to
the tappet f) actuates the lever j and draws out the spring m³: directly the
pressure on the door is taken off the tension of the spring m¹ operates the lever j
and pulls the door back into position: the projection f1 comes in contact with the
projection h thus stopping the tappet f and preventing the door from swinging
back too far.
The door thus acted upon cannot possibly dwell on any centre but always
returns to its proper place.
Instead of using the springs shown in the drawings we may use spiral or any
other suitable springs and the frame i with the levers and may be dispensed
with and each chain connected by a spring to the end of the box.
Having stated the nature of our Invention and described the manner of
performing the same we would have it understood that we do not limit ourselves
to the precise details given as they may be varied or modified without departing
from the main features of our Invention and
We declare that we claim.
1. The improved apparatus substantially as and for the purposes herein shown
and described.
2. The combination of a spindle and double cam with one or more loose tappets
substantially as and for the purposes herein shown and described.
3. The combination of a spindle, double cam and one or more loose tappets with
two horizontal lovers connected by springs and chains to the tappets as shown and
described.
In witness whereof we the said Robert Chapman and John Hibbert have
hereunto set our hands and seals this third day of May One thousand
eight hundred and eighty three.
ROBERT CHAPMAN (L.s.)
JOHN HIBBERT
(L.S.)