An Improved Combined Pneumatic Door Check and Atomizer.
Year: 1893

page_text: Date of Application, 25th May, 1893-Accepted 1st July, 1893
COMPLETE SPECIFICATION.
[Communicated from abroad by THE NORTON DOOR CHECK AND SPRING
COMPANY, a Corporation organized under the laws of the State of Maine, and
located at Portland, State of Maine, United States of America.]
An Improved Combined Pneumatic Door Check and Atomizer.
I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex 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 improvement is for the purpose of disinfecting bath rooms, water closets,
sick chambers and the like, in which the air has a tendency to become foul, and it
consists essentially of a device comprising an atomizer and a pneumatic door check
and spring, the two being so located upon the door and casing that the spring in
the door check rot only closes the door, but in operating the door check, drives
some of the air which is compressed and forced from its air chamber, through the
atomizer for the purpose to be described.
In the drawings
Figure 1 is a perspective view showing this apparatus in position upon the door
and casing.
Figure 2 is a vertical section of the atomizer and
Figure 3 is a longitudinally vertical section of a portion of the pneumatic door
check, showing the air chamber when the piston has been partly pulled back.
A represents the door and A' the casing. a is a bracket secured to the casing
which supports a vessel consisting of a cylindrical body B having a suitable
bottom B and top B" provided with an atomizer of any suitable pattern, by means
of which the contents of the vessel may be sprayed in the manner to be described.
The atomizer shown, consists of a horizontal tube C provided with an internal
passage C, which narrows as shown at C, this end of the tube forming a nozzle
upon which is secured the cap D provided with a perforation D'. A stem E
extends down into the vessel through the cap B¹¹ and is provided with a flange E¹
which rests on the surface of the cap. A passage e extends through the stem E for
the admission of air to the vessel, as its contents is withdrawn during the process of
spraying. E is an extension of the stem E reaching almost to the bottom of the
vessel and provided with a passage el connecting with a passage el cut in the
screw thread on the outer surface of the nozzle C
The pneumatic door check shown in the drawings is known as the Norton and is
too well known to need detail description. The arms or levers F, F¹ are pivoted
to the brackets J, J¹ secured to the door or casing, and are connected to the piston
rod H within the cylinder I. The cap I¹ has the usual regulating screw K.
L is the piston pivoted with passages N, N', N" to allow air to pass into the air
chamber as the piston is withdrawn, the air escaping through the passages P, P₁ as
the piston moves forward. This door check is provided with a spring which lies
behind the piston, and when the piston is withdrawn by the opening of the door, is
compressed so that it will exert itself to push the piston forward and close the
door.
The atomizer is connected with the air chamber of the door check, which is
tapped at R to receive stop cock S, S'. W is a flexible tube which connects the
stop cock with the tube C, as shown.
It will be seen that as the piston L moves forward, while closing the door, the
air in the air chamber is forced out through the opening R, the pipe S and tube W

page_text: into the atomizer, where it draws up the liquid contained in the vessel B and sprays
it into the room through the opening D¹.
This construction differs from anything known in that it is automatic, for when
the piston has been withdrawn by the opening of the door, the spring tends to move
the piston forward pulling the door to and at the same time driving the air out
from the air chamber through the atomizer. By adjusting the position of the stop
cock S¹ and screw K, the amount and force of air entering the pipe S may be
regulated, and by regulating the cap D the flow of the spray can be adjusted.
For example, closing the screw tight, requires the entire contents of the air chamber
to pass out through the stop cock S¹. Should the stream of air be too strong, the
screw K can be opened slightly to allow the portion of the air to exhaust through
the passages P, P1, and the stop cock can be closed more or less when thought
best. The vessel B may be filled with a disinfectant or a perfume as desired, and
it may be located in any part of the room, the connecting tube being made
sufficiently longer. Moreover a bottle may be substituted for the vessel and the
atomizer may be combined with the air chamber of some other form of pneumatic
door check, if thought best.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is:
1st. An automatic air purifier comprising a pneumatic door check and spring, an
atomizer and a tubular connection whose opposite ends lead to the interior of the
said door check and said atomizer, said door check being secured to the door
and casing thereof, whereby the door check in closing the door operates the
atomizer and causes it to spray a portion of its contents into the room, substantially
as described.
2nd. In combination, a door check and spring and an atomizer, the air chamber
of said door check being perforated and connected with the inlet of the atomizer by
a tubular connection whereby as said air chamber is diminished in size by the action
of the spring, its contents are forced through said atomizer, as and for the purposes
set forth
Dated this 25th day of May 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.