IMPROVED. MEANS OF HANGING OR HINGING THE RUDDERS OF ROWING BOATS AND OTHER SMALL CRAFT
Year: 1885

page_text: COMPLETE
SPECIFICATION.
I ALBERT TOM FRAMPTON of The Bank, East Holesey in the County of Surrey,
Bank Manager, do hereby declare the nature of the said invention for IMPROVED.
MEANS OF HANGING OR HINGING THE RUDDERS OF ROWING BOATS AND OTHER SMALL
CRAFT, and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
· My invention relates to an improved means of hanging or hinging the rudders of
rowing boats and other small craft and it has for its object to admit of the rudder
rising on striking the ground or in passing the boat over the rollers of a boat run
and so escaping injury and to enable the rudder to be shipped with ease.
The invention consists essentially in the combination with a single long upwardly
directed pintle attached to the stern post of the boat and a corresponding long eye
or socket or pair of eyes or sockets, on the rudder, of an interlocking device
whereby all strains are taken off the point or unsupported end of the pintle when
the rudder is in working position, without interfering with the rising, shipping or
unshipping of the rudder.
Reference is to be had to the accompanying drawings wherein Figure 1 is a side
elevation showing the improved rudder joint, Figure 2 is a similar view showing
the rudder raised, Figure 3 is a plan of the interlocking device. The same letters
of reference indicate the same parts in all the figures.
The pintle a is of such length as to permit of the rudder rising a sufficient
distance to escape injury without becoming unshipped, this one pintle receiving
both the eyes or sockets b b of the sister fitting, one at the bottom and the other
at the top, or a single socket of corresponding length to the pintle, as the case may
be. The pintle is fixed by its lower end in a boss c formed or fixed on a metal
strip & which has a longitudinal groove in its face concentric to the pintle, in which
are received the eye or eyes b of the sister fitting, so as to make a snug joint. The
pintle has a conical enlargement a' immediately above the boss c to form a seat for
the lower end of the socket of the sister fitting, which is flared to fit on said
enlargement and so as to pass easily over the point of the pintle. The plate d
carrying the pintle is attached to the stern post of the boat, and the plate or plates
carrying the sockets b to the rudder.

page_text: To prevent any leverage strain upon the pintle when the rudder is in working
position, I combine with the above an interlocking device, constituted by a
downward projecting segment or flange e carried by a boss e¹ attached to the rudder
and by an oppositely directed flange f formed on the upper end of the metal strip d,
or on a separate fixing, the two segments or flanges being curved concentrically to
the axis of the pintle so as to be adapted to engage together when the rudder is
shipped and form a pivotal connection upon which the rudder hangs as well as on
the pintle, when in the position shown in Figure 1, but which becomes disengaged
when the rudder rises as in Figure 2, the rudder then hanging on the pintle alone.
This pivotal connection is situated close to the point of the pintle and being made
of the segmental annular form above described, forms no obstruction to the passage
of the eyes or sockets on to or off the pintle. To facilitate the engagement of
these two parts e and f, their adjacent or working surfaces are preferably slightly
bevelled as shown.
Instead of the pintle being attached to the stern post and directed upwards, the
position of the parts might be reversed if desired.
Having now particularly described and ascertained the nature of the said
invention and in what. manner the same is to be performed, I declare that what
I claim is
.
As an improved means of hanging or hinging the rudders of rowing boats and
other small craft, the combination with a joint formed of a single long pintle and
corresponding socket or pair of sockets, of a pivotal connection in axial line with
the pintle, constituted by two oppositely directed concentric flanges, respectively
carried by the rudder and the boat and engaging automatically with one another
when the rudder is shipped substantially in the manner and for the purpose
specified.