Year: 1886

page_text: I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & C° Patent Agents,
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 invention relates to improvements in the apparatus for the transmission of
motive power described in the specification filed with my application for Lettors
Patent dated December 29th A.D. 1885 and numbered 15,995.
According to the present improvements
1st The articulated levers are made double at one end and each provided with
two pawls. Moreover the ends and fulcrum of each lever are not arranged in a
horizontal line but at a greater or less angle according to the different requirements,
The ends of the articulated levers carrying the pawls can each be provided with
two or more projections to form knuckle joints; and
2nd The wheel with which the pawls engage is constructed with portions of two
different diameters but in a single piece, the object being to obtain two different
velocities with a single apparatus.
In the accompanying drawing, given by way of example only, I bave represented
my invention applied to a windlass.
Figure 1 is a side elevation of the apparatus.
Figure 2 is a plan and
Figure 3 shows a lever detached.
Upon a shaft A provided with a crank-handle a are fixed the two excentrics B¹ B³,
the long radii of which are opposed to one another. The faces of these excentrics
are provided with grooves in which run the rollers C₁ C placed at the outer
extremities of the levers D1 D2 fulcrummed at E which rollers cause the oscillation
of the levers by following the grooves in the excentrics.
The other end of each lever is made double, one terminating in the arms F1 F2
and the other in the arms F³ F¼.

page_text: c
These arms carry the pawls R¹ R2 and R R* respectively, which pawls engage
with the portions of different diameters of the wheel G.
The wheel G is mounted upon the shaft P as also is the barrel I carrying the
chain, the brake K and the sleeve N, which latter through the medium of the pin M
and lever O is engaged with and disengaged from the wheel G.
According as it is desired that the cylinder I shall turn at a more or less great
velocity, I operate as follows; that is to say, Taking into consideration a complete
revolution of the shaft A in the case where the velocity desired is great, the two
excentrics B¹. B* oscillate the levers D¹ D³ during their revolution and consequently
their extremities F F and F F; descend so that the pawls R' R' successively,
engage with the teeth of the portion of the wheel G having the smaller diameter,
the pawls R R³ being out of engagement with the wheel G. The shaft P is
thereby rotated and rotates the barrel I and the brake K. through the medium of
the sleeve N and the pin M.
If the barrel is to rotate in the opposite direction to allow the chain to unwind
it is only necessary to lower the lever Land to turn the lever O to the left for
disengaging the pin M from the wheel G. The cylinder I is then free to rotate
backwards, its motion being regulated by the brake K.
If it is desired to turn the barrel at a smaller velocity, it is merely necessary to
throw back the pawls R¹ R₁ upon their arms in order that they do not engage
with the wheel G and to cause the pawls R* R³ to act upon the teeth of the portion
of the wheel of larger diameter.
By the means above described, I completely dispense with the use of separate
wheels and I thereby obtain a very great advantage over similar apparatus as
beretofore employed, the workman being able to release the crank at any moment,
without the backward rotation being produced.
A single workman is thus sufficient for attending to one apparatus in all its
operations, which involves a great economy as regards time and labour.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign correspondent I declare that what I claim is
First. The combination of the wheel G having portions of different diameter, the
levers D¹ D each having two pawls adapted to engage with the teeth of the said
wheel, and the excentrics B¹ B' provided with grooves in which rollers on the said
levers run, all constructed and arranged substantially as, and for the purpose,
described.
Second. The improved apparatus consisting of the parts constructed and com-
bined substantially as described with reference to the accompanying drawing and
operating as, and for the purpose, set forth.
Dated this 27th day of January 1886.
HASELTINE, LAKE & Co.,
For the Applicant.