Improvements in and relating to Ships' Winches.
Year: 1895

page_text: Date of Application, 8th July, 1395
Complete Specification Left. 8th Apr. 1896-Accented 9th May 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to Ships' Winches.
We ROBERT WELFORD of Hunters Hall Sunderland Engineer and PERRY
MITCHINSON of Percival Street Sunderland Engineer do hereby declare the nature-
of this invention to be as follows:-
--
Our improvements consist in using friction driven drums (as many as may be
required) on the barrel shaft (extended with necessary bearings) each being fitted
with brake gear & working independently of each other. These drums may be.
placed on bushes fast on the barrel shaft said bushes having a larger tapered surface
on one side and this in connection with a cone or friction clutch on the other side-
with corresponding surfaces on the drum enables power to be transmitted when the-
clutch is operated by lever & screw also other friction &c. arrangements can be.
adopted as can be easily understood. We prefer to drive the barrel shaft from the
power shaft by worm and wheel but we also use spur gearing & also double purchase
as in the ordinary ships winch without however fixed or loose drums on the second
shaft & we claim drums driven by cone and or other friction gear placed on &.
worked through the barrel shaft gives a better arrangement for working cargo.
Dated this 6th day of July 1895.
ROBERT WELFORD.
PERRY MITCHINSON.
Improvements in and relating to Ships' Winches.
We ROBERT WELFORD of Hunters Hall Sunderland Engineer and PERRY
MITCHINSON of Percival Street Sunderland Engineer 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 :-
Our improvements consist in using friction driven drums (as many as may be:
required) on the barrel shaft (extended with necessary bearings) each being fitted
with brake gear & working independently of each other. These drums may be
placed on bushes fast on the barrel shaft said bushes having a larger tapered surface
on one side and this in connection with a cone or friction clutch on the other side-
with corresponding surfaces on the drum euables power to be transmitted when the
clutch is operated by lever & screw also other friction &c. arrangements can be
adopted as can be easily understood. We prefer to drive the barrel shaft from the-
power shaft by worm and wheel but we also use spur gearing & also double purchase-
as in the ordinary ships winch without however fixed or loose drums on the second
shalt & we claim drums driven by cone & or other friction gear placed on &.
worked through the barrel shaft gives a better arrangement for working cargo.
It will be understood that a cargo such as grain or coal is specially suited to be-
worked by these drums.
The worm & wheel driving arrangement shown in the drawings being practically
noiseless when working is on this account very desirable on passenger ships.

page_text: The accompanying drawings Sheets 1 and 2 show at Fig. 1 a part front elevation
(continued on Sheet 2) and Fig. 2 a half side elevation of an arrangement showing
our improvements in which the worm and wheel style of winch is adopted.
The arrangement of friction driven drums may be shortly described by reference
to drum D on Fig. 1. in which A shows the cone surface of a fixed bush on the
barrel shaft and B shows the movable clutch cone surface. These surfaces are
brought into contact (with more or less force as required) with similar surfaces on
the drum D by the lever E when actuated by the hand wheel G through the
screw F. The brake H is shown operated by the foot lever K.
Having now particularly described and ascertained the nature of our said inven-
tion & in what manner the same is to be performed we declare that what we
claim is
Arranging friction driven drums substantially as described as improvements in
and relating to ships winches.
ROBERT WELFORD.
PERRY MITCHINSON.