Year: 1897

page_text: I, ROBERT JOHN LEGGOTT, of the Firm trading as W. & R. Leggott, Ld., Gar-
nett Street, Bradford, in the County of York, Brass Founders and Finishers, do
hereby declare the nature of this invention to be as follows:-
This invention relates to certain improvements in apparatus for checking or
preventing the slamming of doors, in a manner that, the apparatus is not exposed
and closes the door quickly for a considerable distance, then retarded before it
is finally closed; and consists in arranging the mechanism so that the door to
which it is attached, may be opened in either direction and when the door is
liberated as before stated, is retarded before it is finally closed.
In carrying out my invention, I secure a casing in the floor under the door
at the hinged edge, and mount in the said casing a cylinder through which is
passed a spindle upon which it turns, and to the cylinder and spindle the respec-
tive ends of a coiled spring are secured.
Attached to or forming part of the before mentioned cylinder is a cam, with
which engages a small pulley secured to an arm operated by the door, on the open-
ing of which, the cylinder is moved some distance around the spindle and the
coiled spring operated, in a manner that, on the liberation of the door, the spring
on returning to its normal position closes the door quickly for some distance.
In order to prevent the door slamming, a second cylinder is utilized, made solid
at one end in which may be arranged one or more valves and is pivotted so that
it may move thereon. The cylinder is provided with a piston which may be fitted
with one or more valves, the rod of the piston being connected to a sliding bar
mounted in a pivotted sleeve, and attached to the before mentioned arm, which is
operated by the door.
On opening the door, the piston is moved in the pivotted cylinder and air
admitted to the underside of the piston, which when the door closes forms a cushion
and prevents the door being slammed to by the coiled spring, or by the attendant.
Dated this 20th day of October 1897.
I, ROBERT JOHN LEGGOTT, of the Firm trading as W. & R. Leggott, Ld., Gar-
nett Street, Bradford, in the County of York, Brass Founders and Finishers, do
Price Rd7

page_text: 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:
-
This invention relates to certain improvements in apparatus for checking or
preventing the slamming of doors, in a manner that, the apparatus is not exposed,
and automatically closes the door quickly for a considerable distance, then retards
the movement of the door before it is finally closed; and consists in arranging
the mechanism so that the door may be opened in either direction, and when
liberated, is retarded in its motion before it is finally closed, where it is retained
by the apparatus.
In describing my invention in detail, reference is made to the accompanying
drawings in which Fig. 1 represents a side elevation of my improved apparatus
with one side of the casing removed for more clearly showing the mechanism,
and
Fig. 2 is a plan, with the shoe removed.
In carrying out my invention I secure a casing A, in the floor under the door
at the hinged edge, and to the door attach a shoe B, mounted upon a tongue B₁₂
arranged to fit the square end of a spindle C, supported by a cross bar D, and
bracket D, and to the said spindle is secured an arm E, provided with a small
anti friction pulley F, near to the outer end.
Supported upon standards G, secured to the bottom of the casing is a cylinder H,
through which passes a circular spindle J, upon which the cylinder turns, and to
the said cylinder and spindle the respective ends of a coiled spring are secured
inside the cylinder.
Attached to the exterior or forming part of the cylinder H, is a cam plate K,
with which engages the before mentioned anti friction pulley F, so that on
opening the door, the arm E, is operated one way or the other in the direction
of the curved arrows, by which the anti friction pulley F, travels over one of the
inclined surfaces K', of the cam plate K, thereby moving the cylinder H, some
distance around the fixed spindle J, so that, the before mentioned coiled spring
is operated in a manner that, on the liberation of the door the coiled spring on
returning to its normal position closes the door quickly for some distance, but is
prevented slamming the door in the manner as hereinafter described.
The cylinder H, as before stated is mounted upon a spindle J, to which the
respective ends of a coiled spring are attached, and in order to put the necessary
tension on the said spring for closing the door, I form the ends of the circular
spindle J, square or hexagonal, by which the spindle may be turned and the
necessary tension given to the coiled spring, which is retained on tightening the
set screws L, the ends of which are in contact with the said spindle.
The lateral position of the cylinder H, in relation to the arm E, is adjusted by
the regulation of the set screws M, passing through the standards G, the ends of
which are close to the ends of the cylinder, thus retaining the cylinder in the
required position.
The
In order to prevent the door slamming, a second cylinder N, is utilized as a
check cylinder made solid at one end, and fitted with a cover at the other, and
through both ends a small hole of the required proportionate size is bored.
said cylinder is pivotted at 0, 0, and is provided with a piston P, the rod P¹, of
which is connected to a stud Q, of sleeve R, pivotted at R¹, on the cross bar S,
and mounted in the said sleeve is a sliding bar T, the opposite end of which is
attached by a stud U, to the arm E.
On opening the door, the arm E, is operated in the manner as before described,
and by the attachment of the sliding bar T, to the arm E, by stud U, on the
arm E, radiating in either direction on opening the door, the sleeve R, is turned
on its pivot R¹, by the radiating of the sliding bar T, attached at one end to the
arm E, by which means the check cylinder N, is moved on its pivots and the
piston is moved outwards towards the pivotted end at 0, 0, air filling the space
A

page_text: between the piston and cylinder end, which when the door closes, forms a cushion
between the piston and cylinder end, thus preventing the door being slammed
to by the coiled spring, or by the attendant, the air on escaping through the small
perforation in the end H, of cylinder H, allows the door to close gently.
The shoe B, is fitted with a tongue B¹, engaging with the square end of spin-
dle C, as before described, the opposite end of the said tongue is threaded, a
screw V, passes through the shoe and tongue, so that on regulating the screw V,
the door is adjusted to the closed position when the anti friction pulley F, is in
its normal position in relation to the cam plate K.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I claim
as my invention is:
1. A door closer in which is fitted a horizontal cylinder H, and cam plate K,
combined with a coiled spring secured to the internal circumference of the said
cylinder and to an adjustable spindle J, for the purpose as hereinbefore set forth.
2. A door check in which are combined a lever E, anti friction pulley F,
sliding bar T, and pivotted sleeve R, with a. cam plate K, arranged substantially
in the manner and for the purpose as herein before set forth.
3. A door closer in which are combined a cylinder H, a coiled spring attached
to the same and to a movable spindle J, a cam K, secured to the said cylinder, a
pivotted check cylinder N, with piston and connections to the lever E, and cam K,
all arranged and operated substantially in the manner as herein before set forth
and illustrated.
Dattu
THIS IST
day of May 1898.
JOHN WAUGH,
Agent,
Sunbridge Chambers, Bradford.