Year: 1892

page_text: Figures 4 and 5 are plan views of details of the apparatus, and
Figures 6 and 7 are a sectional plan and a side elevation respectively illustrating
a modification of my invention.
but
a is the bed plate of the apparatus adapted to be bolted to the deck of a vessel
when used on shipboard or to a suitable foundation when used on land and bis
a shaft or spindle which is firmly connected to the centre of the said bed-plate.
c is a hollow shaft adapted to rotate upon the vertical spindle band having secured
upon its upper end a bevel wheel d which forms the head of the capstan and
upon its lower end a pinion e. is the capstan barrel adapted to rotate upon
independently of the hollow shaft c. The said barrel has formed upon the interior
surface of its lower part gear teeth g with which a pinion is adapted to engage
the said pinion being also in engagement with the pinion e at the lower end of
the tubular shaft c. The pinion is carried upon a stud i secured to a disc j
designed to rotate upon the vertical spindle b.
S
k is a tee-piece secured to the head of the spindle and carrying the shaft !
having secured to it a bevel pinion m which engages with the teeth of the bevel
wheel d, the ends of the said shaft being squared as shewn in Figures 1, 2 and
for the application thereto of crank handles. n, n are pawls pivotted to the bevel
wheel d and adapted to engage with lugs or teeth o, o upon the upper side of the
barrel when the bevel wheel d is rotated in one direction and to slip over the
Baid lugs or teeth when the said bevel wheel is moved in the reverse direction.
r, are pawls pivotted to the disc j and engaging with lugs or teeth s, upon the
base plate a the said pawls being arranged in the proper direction to engage
with the teeth when the pawls n are slipping over the teeth o and vice versa.
The operation of the apparatus hereinbefore described is as follows, that is to
say, if motion is imparted to the shaft in such a direction as to cause the pawls n
upon the bevel wheel d to engage with the teeth o, the drum f will also be caused
to rotate at a relatively high speed, the engagement. of the wheel with the
teeth g and the pinion e offering no obstruction as the discj is also free to turn.
If however motion be imparted to the shaft in the reverse direction the pawl n will
slip over the teeth o so that then motion at a lower speed will be imparted to the
barrel from the shaft c through the pinions e and h. It is obvious that in this
case the discj will be held against rotation by means of the pawls r, r pivotted
to the edge of the said disc and engaging with the ring of lugs or teeth s upon
the base plate a, as above described. p p are the usual pawls for preventing the
capstan running back.
If desired I may adapt my capstan to be actuated by means of capstan bars,

page_text: m
In this case I dispense with the bevel wheel d, tee-piece k, shaft and pinion
and substitute therefor a capstan head of the form shewn in Figures 6 and 7, the
said capstan head being firmly keyed to the tubular shaft c, the pawls n, n, being
pivotted upon the said head.
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. A capstan provided with a movable head adapted to be rotated independently
of the barrel and so arranged that when the said head is rotated in one direction
a relatively quick motion will be imparted to the barrel whilst when it is rotated
in the reverse direction the barrel will be rotated at a slower speed, substantially as
described.
2. The improved capstan consisting of the parts constructed and combined
substantially in the manner herein before described and illustrated in the accom-
panying drawings and operated as, and for the purposes, set forth.
Dated the 9th day of June 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.