Year: 1897

page_text: Date of Application, 29th June; 1897-Accepted, 18th Sept., 1897
A communication from FREDERICK JAMES MITCHELL, of 221 Mercer Street, in
the City of New York, in the 'State of New York, United States of America,
Engineer.
I, ALFRED JULIUS BOULT of 111 Hatton Garden in the County of Middlesex,
Chartered Patent Agent 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 apparatus is designed primarily for use in disinfecting systems where it
is the practice to cause a quantity of liquid or powdered disinfectant to be sprayed
into a room or compartment by means of an atomizer operated by the movement
of a door and the invention comprises an air pump having a hollow piston rod,
the end of which is adapted to be secured to either member of the structure-the
door or its frame, an arm also adapted to be pivotted at one end to said support
and at its opposite end to the pump cylinder, a closing stop or roller adapted to
be secured to the other member of said structure to discharge the pump when the
door is closed, a spring which actuates the pump to recharge it when the door is
opened and means for connecting the pump with the atomizer or equivalent
pneumatic device intended to be operated.
In the accompanying drawings.
Figure 1 is a view in elevation showing the pump combined with an atomizer
and attached to the door;
Figure 2 is a similar view showing the pump attached to the door frame and,
Figure 3 is a plan view on a larger scale partly in section also showing the
pump attached to the partially open door.
The pump or air cylinder A is provided with a piston B suitably mounted on
the piston rod b. The end of the piston rod is pivotally attached to a suitable.
support which may be either the door (as shown in Figures 1 and 3) or the door
frame (as shown in Figure 2), by the pivote which passes through the end of
said rod and through the lugs e carried by the plate C, the latter being screwed
or otherwise affixed to said support. A vent tube b¹ communicates with the air
passage 63 which runs longitudinally through the piston rod from the vent
tube to the inner end of the rod behind the piston. A flexible tube D
connects the vent tube with the atomizer E, which is of ordinary construction,
arranged to discharge a liquid or powdered substance when a current of air is
forced through the tube D. This atomizer E as will be perceived, may be located
at a considerably distance from the point at which the cylinder and its operating
mechanism are located. "o the same support to which the piston rod is pivotted
is also affixed a plate 1', which supports the depending pin f, which serves as a
pivot for the arm G, which at its opposite end is pivotally connected with the end
of the cylinder A by the pin g which passes through the thimbles 63 formed on

page_text: the cylinder head. The coil spring H is carried by the pin f, one end of said
spring being firmly secured to the pin and the other end thereof passing under
and behind the arm G so that the spring will tend to carry the arm G away
from the support as shown in full lines in Figure 3. This movement of the
arm G carries the cylinder also away from said support, thereby drawing the
piston towards the end of the cylinder until its movement is arrested by
the engagement of the stop on the piston rod with the head of the cylinder
The closing stop I is securely fixed to and is carried by the other support. This
may be either the door, as shown in Figure 2, or the door frame, as shown in
Figures 1 and 3 and for the purpose of securing easy and noiseless operation of
the parts a roller of wood or other non-metallic substance is secured to said
closing stop in such position that it will engage with the arm G when the door
is closed.
Referring to Figures 1 and 3 the operation of my invention is as follows:
When the door is shut, the' roller i will be in contact with the arm G and
will hold said arm and the cylinder A towards the door-frame as shown in dotted
lines (Figure 3). When the door is open the arm and cylinder will be carried
with it, assuming under the force exerted by the spring H, the position. shown in
full lines, Figure 3. The piston B will thus be drawn towards the forward end
of the cylinder and the space behind the piston will be filled with air which, will:
be drawn in through the tube D, vent tube band passage be in the piston rod.
As the door is further opened although the arm G is out of engagement with the
roller, the arm and cylinder will be held in the same relative position to the
door by the engagement of the stop 6 with the cylinder head. When the door is
closed the arm G will be brought into engagement with the roller and the
arm and cylinder will straighten out into the position shown by dotted lines
forcing the piston towards the back of the cylinder and forcibly expelling the air
contained therein through the passage 6. vent tube band pipe D across the
discharge tube of the atomizer E, thus spraying into the room or apartment where
the atomizer is located a quantity of the liquid or other substance contained
therein.
.A
In the modified arrangement shown in Figure 2, in which the cylinder and its
connected parts are shown supported on the door-frame instead of on the door, as
the door is opened the roller 2 will be carried with it out of engagement with the
arm G and the spring H will swing the arm on its pivot carrying that end of
the cylinder with it and filling the cylinder with air as above described. When
the roller is again brought into engagement witli the arm by the closing
of the door the air will be expelled and the atomizer discharged:
If desired a short section of rubber tubing may be substituted for the roller i.
It will be noted that with the construction which I have herein shown and
described the cylinder A may be attached either to the door or the door-frame
and on either side thereof, and it may be placed either on the side or at the top
of the door. It is also to be observed that it is operated by the closing of the
door, which under certain conditions is a great advantage, while in addition it is
substantially noiseless in operation.
E1
i
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent and in what manner
the same is to be performed, I declare that what I claim is —
1. The improved air forcing device for operating atomizers herein described
comprising an arm G, and a cylinder A provided with a piston B, and piston rod b
pivotally secured to a door or a door-frame a spring arranged to normally hold
said arm and cylinder away from and at an angle to their said support, and a
closing stop I carried so as to engage with the arm. G when the door is closed
and cause the expulsion of the air from said cylinder and means for connecting
said cylinder with an atomizer or equivalent device.

page_text: 2. An air forcing device for operating an atomizer, the whole of which except
the closing stop I is carried upon the door.
3: An air forcing device for operating an atomizer the whole of which except
the closing stop is carried upon the door-frame.
4. The combination and arrangement of parts constituting the complete air-forcing
device for operating an atomizer,, constructed,, carried and operating substantially
as described and illustrated in the accompanying drawings.
Dated this 29th day of June 1897.
BOULT & WADE,
Agents for the Applicant.