Improvements in Revolving Doors for Watertight Compartments.
Year: 1896

page_text: This Print is in accordance with. the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c., Act, 1883), as required
by the decision of the Comptroller General of the 17th day of August 1896.
Date of Application, 25th Feb., 1896-Accepted, 25th Apr., 1896
COMPLETE SPECIFICATION (AMENDED).
Improvements in Revolving Doors for Watertight Compartments.
I, PETER ARSCHAULOFF of Wasilewsky Ostrow, 18 Korschewennaja Linia,
St. Petersburg in the Empire of Russia, Engineer, 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:-
The doors or closing means hitherto employed on ships in the case of accidents
for tightly shutting off the separate compartments have various drawbacks. Apart
from the fact that it is a matter of great danger to close these doors, and thereby
to isolate a certain compartment whilst large masses of water from the adjacent
leaky compartment are Howing into it; it requires a considerable:length of time to
effect the entire closing of the door, even when for operating such doors the most
complete mechanical means is employed. It often happens, thowever, that the
closing of the doors hitherto employed is entirely impossible, when by accident.or
neglect any body or substance happens to lie between the same at the moment when
the door is to be used.
In consequence of this great drawback, in many ships the use of such doors is
entirely dispensed with, and the compartments are permanently separated by fixed
bulkheads so that access can only be obtained from one compartment to the next
by means of hatchways opening to the deck. In the case of warships, however,
where when in action the deck batchways have to be blocked up, it is practically
impossible to adopt an arrangement of permanent fixed bulkheads having no
doors.
This invention relates to an improved door for such.compartments which has all
the advantages and none of the disadvantages of the doors hitherto employed.
The invention is shown in the accompanying drawings, in which,
Figure 1 is a front view partly in section,;
Figure 2, a side view;
Figure 3, a plan view partly in section; and
Figure 4, a detail view showing a corner of the door on a larger scale.
The door consists, as shown, of a hollow cylinder A closed at the ends,which¡is.
revoluble on its longitudinal axis, and is inserted hermetically in a second hollow
cylinder B formed in a similar way. The cylinder B.is provided with a flange B¹
which runs all round the cylinder parallel to the longitudinal axis of the latter.
This flange serves for fastening the cylinder B in the bulkhead or wall separating
the compartments. Openings B2, Figure 3, are cut in the cylinder B in planes
parallel to the plane of the flange B', and diametrically opposite one another, which
openings serve as passages between two adjacent compartments when the cylinder B
is inserted in the bulkhead of such compartment. The inner cylinder A, on the

page_text: .
other hand, has only one such opening A', Figure 3, so that, on the cylinder A
being suitably revolved on its longitudinal axis, the opening A' is alternately
brought into communication with one or the other of the openings B2. The
horizontal width m of the opening A¹ is so arranged that it is smaller than the
distance n of the adjacent longitudinal edges of the two openings B2. If therefore
the cylinder A be turned in the cylinder B the two adjacent compartments are
alternately brought into communication with the interior of the cylinder A, but
in no case can the two compartments stand in communication with one another
through both cylinders A and B.
By this improved door therefore the compartments are always separated from
one another, so that if a mishap arises, they do not need attention and they yet
allow of access from one compartment to the other, for which purpose, as appears
from what has been already stated, it is only necessary to revolve the cylinder A
(after one or more persons have entered therein) until the opening of the same
coincides with the opposite opening of the cylinder B. This rotation of the
cylinder A may take place either from the interior of the same or from one or
other of the adjacent compartments.
For this object a toothed ring Z is fixed on the upper or lower edge of the
cylinder A and is engaged by cogwheels L operated from the outside by means of
handwheels.
The upper pivot J is fixed to the cover of the cylinder B and projects through
and into the cylinder A so that the latter may turn thereon, and on said fixed pivot
a cogwheel K is firmly keyed. The lower pivot J¹ engages in a socket J in the
cylinder B. A pinion H which is revolubly mounted on a stud P fixed to the
cover of the cylinder A engages the said cogwheel K and may be set in rotation
by means of a handwheel T. It is therefore immaterial whether a person stand
inside or outside the cylinder A, as he can revolve the latter by operating either
the wheels R or the wheel T, and therefore make for himself a passage from one
compartment to the next.
This door, or closing means, is applicable to any other cases than that of ships,
where it is a question of having a temporary air or watertight separation of two
paces or chambers.
I am aware of William Kirkaldy's Specification No. 18923 of 1895 and I make
no claim to anything described and claimed therein.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In a revoluble door of the kind described providing the upper or lower end
of the revoluble cylinder (A) with a toothed ring (Z) and with cogwheels (L) to
engage therewith, said cogwheels which are revoluble by means of hand wheels (R)
being mounted in the outer cylinder (B), with the object of enabling the cylinder (A)
to be moved from the outside, that is from one of the two compartments, substantially
as described.
2. In a revoluble door of the kind described, providing an operating mechanism
arranged within the cylinder (A) consisting of a pinion (H) mounted in the
revoluble cylinder and adapted to engage a fixed cog-wheel (K), said pinion having
a hand wheel (T), by rotating which the pinion is forced to travel on the fixed cog-
wheel (K) and to carry with it the revoluble cylinder (A), so that said cylinder (A)
may be rotated by a person within it substantially as described.
Dated this 24th day of February 1896.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.