Year: 1886

page_text: Date of Application, 7th July, 1886.
Complete Left, 5th Apr., 1887.
Complete Accepted, 7th July, 1887.
1, THEODOR THORSEN, of Arendal, in the Kingdom of Norway, Captain, do hereby
declare the nature of this invention to be as follows:-
The apparatus consists of a wooden case with a propeller, a brush, and steering
apparatuses. Figure 1 represents the side which turns against the vessel; figure 2
the side which turns up. At the rear end of the case a propeller a, is placed
which stands through gearing in connection ith the brush 6, in the middle of
which is placed an iron scraper c, formed as an S. The brush is made of common
stiff bristles. The scrapers c, can by means of the screws d, d¹, be adjusted as the
brush becomes worn.
In order to prevent the scraper from pressing too hard against the hull, the
spring m, is fixed under the brush, and this will effect an elastic touching between the
scraper and the hull. When the vessel is afloat, the propeller a, is moved and turns
round the brush b. The horizontal movement of the apparatus is effected by means
of the ropes ₁, z, connected with a tow-line fastened by a block about the martingale
to the jib-boom.
The vertical movement of the apparatus is effected by means of the ropes ₁₂
uniting and connected with the lowering line, which is fastened to the gunwale of the
vessel vertically or thereabouts over the place, where the apparatus is at work. The
board, is moved about the pivot g, and steered by the rope, the board lowered or
raised by means of the rope making the apparatus lower and raise and steering it
thereby in vertical direction. Is the apparatus turned over on the other side of the
vessel, the board and the ropes are attached to the opposite side of the apparatus and g¹,
becomes consequently the pivot, about which the board can be moved. The
apparatus is kept pressed to the vessel as well by its own inclination inwards towards
the front as by the "fixed rudder" h, the surface of which can be increased or
diminished by the vanes 7, which can be moved in and out, regulating thereby the
pressure of the apparatus against the hull of the vessel.
ni 1 It, anh ..
T
1007
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.

page_text: I, THEODOR THORSEN, of Arendal, in the Kingdom of Norway, Captain, 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 apparatus consists of a wooden case with a propeller, a brush, and steering
apparatuses.
In the drawings accompanying my Provisional Specification
Figure 1 represents the side which turns against the vessel; figure 2 the side
which turns up.
At the rear end of the case a propeller a, is placed, which stands
through gearing in connection with the brush b, in the middle of which is placed an
iron scraper c, formed as an S. The brush is made of common stiff bristles. The
scrapers c, can by means of the screws d, d², be adjusted as the brush becomes worn.
In order to prevent the scraper from pressing too hard against the hull, the
spring m, is fixed under the brush, and this will effect an elastic touching between the
scraper and the hull. When the vessel is afloat, the propeller a, is moved and turns
round the brush b. The horizontal movement of the apparatus is effected by means
of the ropes 1,,, connected with a tow-line fastened by a block about the martingale
to the jib-boom. The vertical movement of the apparatus is effected by means of the
ropes ₁, uniting and connected with the lowering line, which is fastened to the
gunwale of the vessel vertically or thereabouts over the place where the apparatus is
at work. The board f, is moved about the pivot g, and steered by the rope, the
hoard lowered or raised by means of the rope making the apparatus lower and raise
and steering it thereby in vertical direction. Is the apparatus turned over on the
other side of the vessel, the board and the ropes are attached to the opposite side of
the apparatus and g¹, becomes consequently the pivot, about which the board f, can be
moved. The apparatus is kept pressed to the vessel as well by its own inclination
inwards towards the front as by the "fixed rudder" h, the surface of which can be
increased or diminished by the vanes 1, which can be moved in and out, regulating
thereby the pressure of the apparatus against the hull of the vessel.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :--
1. In apparatus for cleaning the external surface of vessels the use of a brush
rotating in a parallel direction with and against the side of the vessel and driven by
means of gearing by a propellor.

page_text: 2. In apparatus as claimed in 1 :—
a The employment of the spring m, under the brush:
6 The combination of a brush and the scraper b and c, as well as the screws d, d.
c The fixed rudder h, having vanes 7, by which the surface of the rudder can be
increased or diminished.
d The steering of the apparatus by means of board, rudder, and ropes, as herein-
before described and illustrated.
3. A bottom-scraper as shown by drawing and description.