Improvements in Blocks and Tackles.
Year: 1897

page_text: Date of Application, 29th Mar., 1897-Accepted, 22nd May, 1897
Improvements in Blocks and Tackles.
I, THEODORE BOSKE, of 88 Ellison Street, Patterson, in the County of Passaic,
and State of New Jersey, United States of America, Music Dealer 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 blocks and tackles, and has more particular
relation to blocks for tightening and securing clothes lines.
The invention consists of the combination with a suitable frame, of a grooved wheel
mounted in the same and adapted to receive one end of the clothes line, a cain pivoted
in said casing and connected to the opposite end of the line in such manner that when
the strain is brought to bear upon the two lines the cam is jammed against the line
upon the grooved wheel, thus locking the same in position.
The invention also consists of certain other novel constructions, combinations and
arrangements of parts, all of which will be hereinafter more fully described and
claimed.
In the accompanying drawings forming part of this specification,
Figure 1 represents a perspective view of the meeting ends of two clothes lines
showing my invention applied thereto.
Figure 2 represents a central vertical longitudinal section through my improved
block, and
Figure 3 represents an enlarged detail perspective view of the cam.
A, A in the drawings represent the clothes lines, B the block casing or frame,
C the grooved wheel and D the cam. Said frame B comprises two spaced plates, held
apart by spacing blocks b. The grooved pulley wheel C is pivotally mounted between
said pintes, so that one of the clothes lines may be passed over and down by the same,
extending through between said plates. The cam D is pivotally mounted between the
said plates and is provided with an extension d having an eye for the attachment
of one of the ropes of the line. The said cam is also provided with a socketed
extension d.
It will be observed from the foregoing description, that when any tension is brought
to bear upon the line connected to the eye d' the cam will be forcibly brought into
engagement with the line passing over the wheel C, and any pull upon this latter line
will simply tend to jam the cam more tightly in position. By this means, when it is
desired to tighten the lines, the lower free end of the rope passing over the wheel C
is pulled downward, temporarily disengaging the cam therefrom. Upon said rope
being released, the cam immediately springs back into place because of the tension
of the rope connected to the eye d; and thus again jams against the rope passing
about the grooved wheel, and holds the same firmly in position.
I do not care to limit the application of this block to clothes lines, as the same
may be applied in any position where two ropes are to be adjustably connected
together, so that they may be tightened from time to time as they become slack,
because of the condition of the weather or from other reasons.
The office of the socketed extension d² is to assist in disengaging the cam from
the rope passing about the wheel C, by inserting the head of a clothes line pin
therein, said clothes pin acting as a lever. This is only necessary when the block
has stood for some time, so that the cam has become firmly wedged against the
rope passing about the wheel C, and cannot be otherwise disengaged from the
same.

page_text: It is the work of a very few minutes to tighten the ropes connected to this block,
and this action causes the cam to act the minute the pressure upon the free end of
the rope is removed, and thus lock ropes in their adjusted positions.
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. The combination with spaced plates, of a grooved wheel journaled between the
same and adapted to receive one rope, and a cam also journaled between said plates
in proximity to said wheels and provided with a suitable attaching means for
another rope; the construction and operation being such that the cam jams against
the rope passing about the grooved wheel when any pressure is brought upon either
rope, substantially as described.
2. The combination with two spaced plates, of a grooved wheel pivoted between
the same and adapted to receive a rope, a cam also pivoted between said plates and
provided with a projection formed with an eye for the attachment of a rope, and
a projection formed with a socket for the application of a suitable lever; the
construction and operation being such that the cam is jammed against the rope
passing about the pulley when any pressure is brought to bear upon either of the
ropes, substantially as described.
DL:
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.