Improvements in Door-checking Brackets and Fittings.
Year: 1889

page_text: Date of Application, 19th Sept., 1889
Complete Specification Left. 19th June, 1890-Accepted, 19th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Door-checking Brackets and Fittings.
We, WILLIAM SNELGROVE, of the "Nest," Kings Norton in the County of
Worcester, Engineer, and WILLIAM BEILEY AVERY of the firm of Messrs. W. & T.
Avery Mill Lane, Birmingham in the County of Warwick Weighing Machine
Manufacturers do hereby declare the nature of this invention to be as follows:-
:-
Our invention has for its object to prevent the slamming and violent closing of
doors common chiefly to those fitted with springs; but we also place our improved
brackets and fittings to doors that are not provided with springs.
The arrangements at present in use for this purpose are either dependent upon
pistons working in tightly fitting cylinders, or to peculiarly shaped springs and levers,
which, when subjected to the actual rough usage common to all doors and frames, are
liable to derangement.
We construct an anti-slamming" door check in one convenient form for ordinary
use, by making a bracket to attach to the lintel or frame, which bracket carries a
movable pivotted arm or catch piece, shaped in a curved and suitably formed manner,
so that a projecting lever, bracket, or striker, attached to the door itself, shall come
into contact with the curved and suitably formed end, and thus cause the arm to move
upwards if this upward movement, or the speed of the door is sufficient, the striking
piece then comes into contact with a rubber buffer or pad carried upon a rear portion
of the arm, and upon this buffer being struck by the projecting lever or striker the
door rebounds away from the arm which consequently falls into its normal position,
and when the door again moves with its momentum reduced, but under the impulse
of an ordinary spring or by hand or other power, the projecting striker is then free to
pass along a space channel or groove formed to receive it, and the door can be quietly
and gently closed.
We form the arm that it may be free to be lifted or moved upon its pivot upon
the bracket, as above described, by giving a sloping or tapered surface to its outer or
free end, so that the striker coming into contact with the sloping edge causes the
arm to ride above it, so that it can then pass and strike against the india rubber
buffer, pad, or springing or yielding surface of the arm, which thereby receives the
momentum from the door and causes it to rebound away from the buffer and arm.
We also construct the inner side arm with a sloping surface to enable the striker to
lift it on opening the door; thus, when the door is pushed rapidly, its bracket or
lever will first strike the tapered or sloping outer edge of the arm and thus cause the
arm to rise and bring the buffer surface opposite the line of travel of the lever or
striker, so that the door cannot he closed until after its superfluous energy is spent
upon the buffer, which, after the rebound of the door, falls again; thus, if the
momentum has been fully taken up from the door its journey again is not impeded as
the channel or groove for the projecting lever or striker is brought opposite to the
line of travel of the striker, and the movement of the door to its final closing is not
thereby impeded as the striker passes down the groove freely and without inter-
ruption.
Shouli the door, however, be gently pushed or only the proper amount of force
be given to cause it to close without jar or shock, then the end of the arm will
only be lifted sufficiently to allow of the lever or striker passing beneath it, and
the arm will fall after the passage of the striker before the latter has time to
reach the buffer portion, the striker therefore passes down the channel or groove
in the arm freely, and the door is closed. Thus our improvements do not in any
way impede the action of closing, unless the motion of the door is such as to
cause a jar or shock; and the impediment or check when. introduced by the rapid

page_text: movement of the door is actually removed after the energy or momentum has been
spent upon the buffer and the force thereby reduced to that alone necessary to
close the door without shock..
The particular system of affixing our improvements we vary to suit the require-
ments of the various forms of doors; but in each case the essential feature of our
invention is the same, namely, a moving or rising arm in connection with a
buffer or other form of check or stop, which arm, being normally in the line of
the door movement is raised or pressed aside by the moving door and thereupon
moves the buffer into position to be struck by the door after the passage of the
door past the arm, the latter returns to its norimal position withdrawing the buffer
from in front of the door, which consequently is free to shiut without inter-
ruption.
The striker we sometimes form with a roller or rubber end, and we also in
some cases enclose the whole of the moving arm with its piyot carrying bracket,
within suitably shaped or ornamental cases or frames.
Behind the inner end of the arm, and against its bracket, we sometimes place
a pad to receive the butt end of the arm and thus prevent noise when the lover or
striker causes a very sudden or rapid movement, and the shape of the arm we vary
and modify to give a suitably slow movement after it has been, struck by the
projecting door lover.
We do not limit the application of our invention to any particular closing arrange-
ment, but adapt it to suit any kind of door with or without springs for closing with
similar advantage.
It will be seen that the automatic application or removal of the buffer is ensured in
our invention in two ways.
A slow moving door only raises the arm just sufficiently to pass it, the arm has
therefore its shortest distance to fill to remove the buffer while the slow travel of the
door between the arni and the withdrawing buffer still more certainly ensures that
the latter will be out of the way.
On the contrary, with a fast moving door not only is the arm raised by the force of
the blow to a higher position and consequently requires a longer time to fall and
remove the buffer; but the increased speed of the door between the arm and the
buffer ensures its striking the latter before it has had time to drop out of the way.
Dated this 18th day of September 1889.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicants.
COMPLETE SPECIFICATION.
Improvements in Door-checking Brackets and Fittings.
We, WILLIAM SNELGROVE, of The Nest, King's Norton in the County of Worcester,
Engineer, and WILLIAM BEILBY AVERY of the firm of Messrs. W..&T. Avery, Mili
Lane Birmingham in the County of Warwick, Weighing Machine Manufacturers 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 has for its object to prevent the slamming and violent closing of
doors, common chiefly to those fitted with springs; but we also place our improved
brackets and fittings to doors that are not provided with springs. The arrangements
at present in use for this purpose, are either dependant upon pistons, working in
tightly fitting cylinders, or to peculiarly shaped springs and levers, which when
subjected to the actual rough usage common to all doors and frames, are liable to
derangement.
We.construct an anti-slamming door check in one convenient form for ordinary use,
by making a bracket to attach to the lintel or frame, which bracket carries a movable

page_text: pivotted arm or catch piece, shaped in a curved and suitably formed manner so that
a projecting lever, bracket, or striker, attached to the door itself, shall come into
contact with the curved and suitably formed end, and thus cause the arm to move
upwards; if this upward movement, or the speed of the door is sufficient, the striking
piece then comes into contact with a rubber buffer or pad carried upon a rear portion
of the arm, and upon this buffer being struck by the projecting lever or striker the
door rebounds away from the arm which consequently falls into its normal position,
and when the door again moves with its momentum reduced, but under the impulso
of an ordinary spring or by hand or other power, the projecting striker is then free to
pass along a space, channel or groove, formed to receive it, and the door can be
quietly and gently closed.
the
We form the arm that it may be free to be lifted or moved upon its pivot upon
bracket, as above described, by giving a sloping or tapered surface to its outer or free
end, so that the striker coming into contact with the sloping edge causes the arm to
ride above it, so that it can then pass and strike against the india rubber buffer, pad
or springing or yielding surface of the arm, which thereby receives the momentum
from the door, and causes it to rebound away from the buffer and arm.
We also construct the inner side arm, with a sloping surface to enable the striker to
lift it on opening the door; thus, when the door is pushed rapidly, its bracket or lever
will first strike the tapered or sloping outer edge of the arin and thus cause the arm
to rise and bring the buffer surface opposite the line of travel of the lover or striker,
so that the door cannot be closed until after its superfluous energy is spent upon the
buffer, which, after the rebound of the door, falls again; thus, if the momentum has
been fully taken up from the door its journey again is not impeded as the channel or
groove for the projecting lever or striker is brought opposite to the line of travel of
the striker, and the movement of the door to its final closing is not thereby impeded
as the striker passes down the groove freely and without interruption. Should the
door, however, be gently pushed or only the proper amount of force be given to cause
it to close without jar or shock, then the end of the arm will only be lifted sufficiently,
to allow of the lever or striker passing beneath it, and the arm will fall after the
passage of the striker before the latter has time to reach the buffer portion, the striker
therefore passes down the channel or groove in the arm freely, and the door is closed.
Thus our improvements do not in any way impede the action of closing, unless the
motion of the door is such as to cause a jar or shock; and the impediment or check
when introduced by the rapid movement of the door is actually removed after thie
energy or momentum has been spent upon the buffer and the force thereby reduced to
that alone necessary to close the door without shock.
The particular system of affixing our improvements we vary to suit the requirements
of the various forms of doors; but in each case the essential feature of our invention
is the same, namely, a moving or rising arm in connection with a buffer or other
form of check or stop, which arm being normally in the line of the door movement is
raised or pressed aside by the moving door and thereupon moves the buffer into
position to be struck by the door after the passage of the door past the arm, the latter
returns to its normal position withdrawing the buffer from. in front of the door,
which consequently is free to shut without interruption.
The striker we sometimes form with a roller or rubber end, and we also in some
cases enclose the whole of the moving arm with its pivot carrying bracket, within
suitably shaped or ornamental cases or frames.
pad
Behind the inner end of the arm, and against its bracket, we sometimes place a
to receive the butt end of the arm and thus prevent noise when the lever or striker
causes a very sudden or rapid movement, and the shape of the arm we vary and
modify to give a suitably slow movement after it has been struck by the projecting
door lever.
We do not limit the application of our invention to any particular closing arrange-
ment; but adapt it to suit any kind of door with or without springs for closing with
similar advantage.

page_text: It will be seen that the automatic application or removal of the buffer is ensured in
our invention in two ways.
A slow moving door only raises the arm just sufficiently to pass it, the arm has
therefore its shortest distance to fall to remove the buffer while the slow travel of the
door between the arm and the withdrawing buffer still more certainly ensures that the
latter will be out of the way.
On the contrary; with a fast moving door not only is the arm raised by the
force of the blow to a higher position and consequently requires a longer time to
fall and remove the buffer; but the increased speed of the door between the arm
and the buffer ensures its striking the latter before it has had time to drop out
of the way.
In the accompanying drawings the same letters of reference in the two figures
indicate the same parts.
Fig. 1 is a side elevation of our door checking bracket and fittings for the same,
shown in position upon a door and door frame. The dotted lines upon the figure
indicate the door checking bracket or buffer, in the position caused by the effect of a
considerable push or slam given to the door.
Fig. 2 is a plan of the arrangement when the door is in its closed or shut
position.
A is the movable arm or catch piece, working upon a pivot or centre pin B carried
by the bracket C, which bracket is secured to the frame or lintel D by screws d.
Upon the lower portion of the peculiarly shaped free end of the catch piece or movable
arm, we secure a pad E of india rubber, or other suitable yielding material or com-
position, and upon the opposite or inner end F of the movable armi we place or form
guards or stops FF" to prevent too great a movement being given to the arm; the
projecting stops we cause to come against pads of rubber for other yielding
material such as leather, these pads being rigidly attached to the bracket C.
The end of the arm we weight or construct in a solid form to balance and keep
the arin in correct position for receiving the striking lever or roller G carried upon
the door L.
The striking lever or projecting roller G we mount upon or attach to a bracket K
which we secure to the door L by screws L'; and we by preference construct the
bracket with an upper lip k to be let in or recessed into the upper portion of the door.
The roller or striking portion of the door bracket we form out of india rubber or
leather, or we encase the projecting striker bar G¹ with leather or other yielding
material; and we secure the projecting striker G¹ to the bracket K by means of a set
screw or by any other well known method.
We construct the brackets out of metal and we make them of any desired strength
for large or small doors substantially as herein before described.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is.
- 1. The construction of door brackets and fittings for prevention of slamming of
doors, having a vibrating arm and projecting striking bracket and lever substantially
as set forth.
2. The combination and arrangement of a vibrating or pivotted arm having a heavy
or balanced end, with a curved or open receiving end, together with a projecting lever
arm or roller, carried upon a bracket secured to the door, for the purposes herein before
described and substantially as set forth in the accompanying drawings.
Dated this 18th day of June 1890.
MARKS & CLERK,
• 13, Temple Street, Birmingham, Agents for Applicants.
MARKS & CLERK,
• 13, Temple Street, Birmingham, Agents for Applicants.