Year: 1897

page_text: Date of Application, 1st Sept., 1897-Accepted, 2nd Oct., 1897
I, EMIL OSKAR BEYER of the Firm of Th. Würtz Nachfolger, of Leipzig-
Lindenan, in the Empire of Germany, Merchant, 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:
This invention relates to a device, by means of which the noiseless closing
of doors or the like is obtained.
The essential feature of the invention is, that a buffer lever controlled by a
spring is kept by means of a securing device, when the door is open, until the
latter pushes against the buffer and the latter then goes back, so that the door
closes silently; when the door is opened, the lever is again conducted back into
its effective position and kept so by means of the securing device.
In the annexed drawing Fig. 1 is a view of the buffer-arrangement in position
when opening the door.
Fig. 2 is the same when closing the door.
Figs. 3 & 4 are front- and side-views of the buffer, when the door is closed.
Fig. 5 is a section on line R-R.
Figs. 6 & 7 are front- and side-views of the buffer when the door is opened.
Fig. 8 is a section on line S S.
The movement of the door is transferred to the buffer-lever B by means of
rods by a rising door band (Figs. 1 & 2) or by a piece put on the latter.
The buffer-lever B is pivoted at b and is angularly formed and provided with
the following device.
On the plate C there is a guide g, over which a catching lever h slides.
This lever lies behind the buffer-arm of the lever B and is fixed on the latter
pivotted at a.
The lever his further in connection with the buffer lever t, which, together
with the socket A, is always pressed outwards by the spring f.
The upper arm of the lever B reaches by means of a pin into a longitudinal
slots of the rod S, whereby the pin and lever gives a certain play to the rod.
The device operates in the following manner.
When opening the door the lever B not being held by the lever hand the
nose g, but pressed upwards by springs k is in the upper position (Figs. 1, 3, 4 & 5).
As soon as the door is opened correspondingly wide the rod $ effects a downward
turning of the lever B, whereby the lever is guided over the obliquely rising
guide 9 and laid behind the same, and thus the low position of the buffer A is
secured, Figs. 2, 6, 7 & 8.
When the door is closed by the falling band or spring or weight, it strikes at
first against the buffer A lying in the way of the door."
This buffer A is pressed back by this stroke and the lever h is lifted out behind
the guide g; simultaneously also the buffer-lever B is brought upwards that is
to say out of reach of the door by means of the spring k, so that the door is pressed
home noiselessly and without shock.
Hereby the slots in the rod S comes into effect, as the lever B can swing freely,

page_text: in order to be again pressed downwards by the rod S after a certain movement
of the door, when opened.
Th arrangement of the single jarts to one another, as well as their arrangement
the door or the door-wall, may be varied.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is:
An improved device for the noiseless closing of doors by means of a spring
operated lever, provided with a buffer pulled back from the reach of the door,
after the door has pushed on the buffer, characterized by the arrangement, for
connecting the buffer-lever with aslever h, which in co-operation with the guide g
keeps the buffer-lever B controlled by the spring k in its lowest position, until the
closing of the door, so that the lever B is only brought out of reach of the door
by means of the spring k after the closing of the door, all substantially as
illustrated and described.
Dated this 1st day of September 1897.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, Agents for Applicant.