Improvements in Apparatus for Opening and Closing Water-tight Bulkhead Doors in Steam Ships.
Year: 1896

page_text: Date of Application, 18th July, 1896
Complete Specification Left, 15th Aug., 1896-Accepted, 19th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Opening and Closing Water-tight
Bulkhead Doors in Steam Ships.
I, THOMAS MOODIE of Earnock Villa, Hamilton in the County of Lanark,
Colliery Manager, do hereby declare the nature of this invention to be as
follows:-
This invention relates to bulkhead doors of steain ships and it has for its object
the provision of apparatus whereby the opening and closing can be effected either
from the engine room or bridge of the ship.
The invention consists in applying a geared electric motor situated in proximity
to each bulkhead door for the purpose of speedily closing same, the apparatus
being under the control of the officer on the bridge of the ship, or capable of being
operated from the ship's deck or engine room.
The apparatus consists of an electric motor the armature spindle of which has
a small pinion fixed upon it which gears with a larger pinion on a separate shaft
carried upon the frame of the motor and on this latter shaft another and smaller
pinion is secured which gears with a large pinion on a second shaft. On the other
end of this second shaft is a small pinion which transmits power from the motor to
a rod connected to the bulkhead door by its action upon a rack formed or secured
upon said rod with which the latter pinion gears, the rack being guided in the
motor 'frame. The action of the motor upon the bulkhead door is direct, and the
door is capable of being closed almost instantaneously by operating either of a
number of double pole switches one of which is situated on the bridge, the engine
room and at one or more places on the deck, to complete a corresponding number
of circuits from the dynamo to the motor.
Dated this 17th day of July 1896.
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62 St. Vincent Street, Glasgow, Agent for the Applicant.
Improvements in Apparatus for Opening and Closing Water-tight
Bulkhead Doors in Steam Ships.
1, THOMAS MOODIE, of Earnock Villa, Hamilton, in the County of Lanark,
Colliery Manager, 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 bulkhead doors of steam ships and it has for its object
the provision of apparatus whereby the opening and closing can be effected either
from the engine room or bridge of the ship.
The invention consists in applying a geared electro motor situated in proximity
to each bulkhead door for the purpose of speedily closing same, the apparatus
being under the control of the officer on the bridge of the ship, or capable of being
operated from the ship's deck or engine room.

page_text: The apparatus which is illustrated on the accompanying drawings, Figure 1 of
which is an elevation and Figure 2 a plan, consists of an electro motor the
armature spindle A of which has a small pinion B fixed upon it which gears with
a larger pinion C on a separate shaft D carried upon the frame E of the motor,
and on this latter shaft another and smaller pinion F is secured which gears with
a larger pinion G on a second shaft H carried in bearings H'. On the other end
of this second shaft H is a small pinion I which transmits power from the motor
to a rod J connected to the bulkhead door K by its action upon a rack L formed
or secured upon said rod J with which the pinion gears, the rack L being guided
in the motor frame as shown particularly at Figure 2. The action of the motor.
upon the bulkhead door K is direct, and the door is capable of being closed almost
instantaneously by operating either of a number of double pole switches M, one of
which is shown at Figure 2, a separate switch being situated on the bridge, in the
engine room and at one or more places on the deck, to complete a corresponding
number of circuits as X from the dynamo to the motor.
The motor may either be placed horizontal or vertical to suit the closing direction
of the door, the action of the motor upon the floor being in either case direct.
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 :-
In apparatus for closing bulkhead doors in ships the employment of an electro
motor combined with speed reducing gear arranged to operate the doors substantially
as described, said motor being capable of being set in motion from the bridge,
engine room or deck for the purpose set forth.
Dated this 14th day of August 1896.
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62 St. Vincent Street, Glasgow, Agent for the Applicant.