Year: 1886

page_text: Date of Application, 5th June, 1886.
Complete Left, 2nd Feb., 1887.
Complete Accepted, 4th Mar., 1887.
We, THOMAS THRIPPLETON of 180 Halliwell Road, Engineer, and WILLIAM HENRY
HOYLE of Albert Villa, Chorley New Road, Manager, both of Bolton in the County of
Lancaster, do hereby declare the nature of our said invention to be as follows:-
This invention relates to improvements in the means employed for opening and
closing plug taps, such as, Glass Water Gauges, Blow-off, Injection, and other taps
made on the plug principle and consists in mounting on the stem of the plug a
ratchet wheel operated by a "pawl" attached in any convenient way to the handle;
the "pawl and ratchet wheel being enclosed in a suitable casing or otherwise.
If desired the pawl" can be provided with a spring to ensure it operating on the
ratchet wheel with the movement of the handle.
In another arrangement we dispense with the "pawl" and construct the spring so
as to fulfil the function of the "pawl."
In another arrangement the "pawl" and ratchet wheel are substituted by friction
gearing operated in any convenient way.
The object of this invention is to remove a serious defect in plug taps which can
be opened and closed only by a reciprocating motion of the plug, consequently the
plug is continually moving over the same surface, through which they very soon
become corroded and leak which can only be remedied by grinding.
By our improvements the plug is operated by a "pawl and ratchet wheel giving
a rotary motion to the same which produces a grinding effect and reverses the sides of
the plug alternately to the pressure, resulting in an uniform wearing of the same, as
well as that of making them steam and water tight.
EDMOND CHADWICK;
Agent for Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Plug Taps.
We, THOMAS THRIPPLETON of 180 Halliwell Road, Engineer, and WILLIAM HENRY
HOYLE of Albert Villa, Chorley New Road, Manager, both of Bolton in the County of
Lancaster, do hereby declare the nature of our said 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 means employed for opening and
closing plug taps, such as, Glass Water Guages, Blow-off, Injection, and other taps
made on the plug principle, and consists in mounting on the stem of the plug a ratchet
wheel operated by a pawl attached in any convenient way to the handle; the
"pawl" and ratchet wheel being enclosed in a suitable casing or otherwise.
If desired the "pawl" can be provided with a spring to ensure it operating on the
ratchet wheel with the movement of the handle.
In another arrangement we dispense with the "pawl" and construct the spring so
as to fulfil the function of the " paw)."
In another arrangement the "pawl" and ratchet wheel are substituted by friction
gearing operated in any convenient way.
The object of this invention is to remove the serious defect in plug taps which can
be opened and closed only by a reciprocating motion of the plug, consequently the
plug is continually moving over the same surface, through which they very soon
become corroded and leak which can only be remedied by grinding.
By our improvements the plug is operated by a "pawl and ratchet wheel giving a
rotary motion to the same which produces a grinding effect and reverses the sides of
the plug alternately to the pressure, resulting in an uniform wearing of the same, as
well as that of making them steam and water tight.
Fig. 1 is an outside elevation of our improved apparatus for operating plug taps and
Fig. 2 is a part sectional elevation of the same through line A. B.
To the ordinary stem D of the plug C is fitted the ratchet wheel E mounted in the
casing Fattached to the handle G. To the handle G is pivoted the "pawl" H by the
pin I
The ratchet wheel E and "pawl" H are enclosed in the casing by
the movable cover J secured by the screws K in the projections P. After the ratchet
wheel E and casing F have been placed on the stem D of the plug C they are secured
in position by the nut L, or its equivalent. The motion of the handle G, casing F,
and "pawl is reciprocal, while that of the plug Cis rotary by the "pawl" H
operating on the ratchet wheel E when moved by the reciprocating handle G in the
direction indicated by the arrow. The casing F and cover J swivel on the round part
of the stem D and the boss M of the ratchet wheel E respectively. When the
handle G is moved in a contrary direction to that indicated by the arrow the ratchet
wheel E and the plug Care stationary.
::

page_text: If desired the " pawl "His provided with the spring N, as shown in Fig. 3,
to ensure it operating the ratchet wheel E by the reciprocating movement of the
handle G.
::
Fig. 4 is an arrangement wherein the pawl H is substituted by the spring N.
Fig. 5 is a back elevation and Fig. 6 a sectional elevation of our invention wherein
friction gearing is substituted for the "pawl" and ratchet wheel. The stem D of the
plug is fitted with the disc or casing F in which the "pawl" or driving piece H
operates the latter being enclosed by the movable cover J.
9
The disc or casing Fis
provided with the boss S on which is mounted the lever or handle G, being secured to
the stem D by the nut L, or its equivalent.
The pawl or driving piece H is pivoted or fixed to the boss of the lever or
handle G by the pin I. The outside edge of the " pawl or driving piece H,
from a to b, is constructed to the radius of the internal rim of the disc or casing F,
and from to to the radius indicated by the dotted line. When the lever or
bandle Gis turned so as to move the "pawl" or driving piece H in the direction
indicated by the arrow the disc or casing Fattached to the plug is rotated, and vice-
versa when turned in a contrary direction, by which an intermittent rotary motion is
given to the plug by the reciprocating motion of the lever or handle G and the "pawl"
or driving piece H. The spring N is provided to release the grip of the "pawl" or
driving piece I immediately pressure is removed from the lever or handle G, after
which the "pawl" or driving piece H can be reciprocated by the movement of the
lever or handle G without moving the disc or casing F and the plug to which it is
attached.
Fig. 7 is a part sectional elevation showing another method of constructing the
outside edge of the "pawl" or driving piece H and the inner rim of the disc or
casing F for the purpose of increasing frictional contact with the least possible width.
An important feature of this invention is that it can be applied to existing plug taps
without interfering with their construction, which when removed allows of them being
operated by a box key or spanner in the usual manner.
Having now particularly described and ascertained the nature of our said Invention
and in what manner the same is to be performed, we would have it understood that
we lay no claim to the method of rotating the plug as the same is not novel, but
declare that what we claim is :-
The respective combinations and arrangements of apparatus consisting of the
handle or lever G, casing F, cover J, ratchet wheel E, "pawl" or driving piece H,
and spring N, applied and operating substantially as and for the purpose herein
described and illustrated by the drawings.
EDMUND CHADWICK, Fel. Inst. P.A.,
92, St. George's Road, Bolton,
Agent for Applicants.