provements in and connected with Mast Head Sheaves and Frames.
Year: 1898

page_text: PROVISIONAL SPECIFICATION
Improvements in and connected with Mast Head Sheaves and
Frames.
We, WILLIAM ANSELL, trading as E F Jones and Co., of 7, Kensington Street.
Birmingham, Warwickshire, Ship's Fittings Manufacturer and Iron and Brass-
founder, and MAXWELL JOHN MACDONALD TINDALL, of Fraserburgh in the County
of Aberdeen, North Britain, Iron Merchant, do hereby declare the nature of
this invention to be as follows:-
This
This invention has reference to those sheaves and frames which are adapted
to be hxed in the mast head for hauling up the main sail on the fore sail. Hereto-
fore the rope in passing over the sheave or pulley has been injured and in course
of time considerably worn by rubbing against the sides of the frame
defect we overcome as follows,-In each side of the mast head frame we provide
two vertical rollers tuining on pins passing through eyes or lugs formed on the
sides of the mast head frame that is to say, there are two rollers at one side of
the sheave or pulley and two rollers at the other side of the same so that the rope
as it passes over the sheave or pulley bears against one or more of these rolleis
and 18 thus prevented from being rubbed and worn away In combination with
the said rollers the sides of the mast head frame are extended at the edges and
rounded below the rollers to conform with the outline shape of the sheave or
pulley and effectually prevent the rope getting jambed between the sides of the
sheave or pulley and the sides of the frame
In a modification of this invention the said rollers are independent of the mast
head frame and are carried by side plates which are arranged outside the mast
and serve to strengthen the same these side plates being provided with the lugs or
bosses through which the pins of the rollers pass The main axle pin of the
pulley or sheave passes through these side plates which are by preference curved,
when viewed in plan, to correspond with and fit against the mast and are also
by preference extended above and below the central pin so that the bolts or pins
which pass through the side fiames above and below the sheave or pulley will
also pass through these strengthening plates
In a further modification of this invention the axle pins of the said rollers are
carried by small brackets or plates which are bolted or otherwise fixed to the mast
or to the mast head frame in the proper positions for the rope to bear against
the rolleis as above described as it passes over the sheave or pulley
Dated this 24th day of December 1898

page_text: Improvements in, and connected with Mast Head Sheaves and
Frames.
We, WILLIAM ANSELL, trading as E F Jones and Co, of 7, Kensington Street,
Bumingham, Warwickshire, Ship's Fittings Manufacture and Iron and Brass-
founder, and MAXWELL JOHN MACDONALD TENDALL, of Fraserburgh in the County
of Aberdeen, North Britain, Iron Merchant, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement.—
This invention has reference to those sheaves and frames which are adapted
to be fixed in the mast head to hauling up the main sail on the fore sail Heie-
tofore the 1ope in passing over the sheave or pulley has been injured and in course
of tume considerably worn by rubbing against the sides of the frame
This defect we overcome as we will describe by efening to the accompanying
drawings on which Fig 1 is a tiont elevation of a combined mast head sheave
and fiame constructed according to this invention, Fig 219 a side view partly
in section, Fig is a sectional pian of the same on line X X of Fig 2, Fig 4
18 a side elevation of one of the side plates of the fiame looking from the interior,
Fig 5 is a font elevation of a mast head sheave and fiame illustrating anothei
ai rangement of our invention, Fig 6 18 a side elevation of the same, Fig. 7
is a sectional plan of the same on line Y Y of Fig 6; Fig 8 is a side elevation
and Fig 9 16 a sectional plan of a part of the same, Fig 10 18 a side elevation
partly in section and Fig 11 is a plan of a further modification of this invention.
The same letters of reference indicate the same or corresponding paits in all
the Figures.
d'
In carrying out this invention in each side of the mast head trame we provide two
vertical rollers marked respectively d¹ d d d turning on pins e passing through
eyes or lugs a a¹ «² aª að a³ a' at formed on the sides A¹ A of the mast head
frame, that is to say, there are two rollers d¹ at one side of the sheave on
pulley B and two rollers at the other side of the same so that the rope as
it passes over the sheave or pulley B bears against one of these rollers d¹
or d and is thus prevented from being rubbed and worn away In combination
with the said olleis d¹ d² d³ the sides A' A³ of the mast head frame are ex-
tended at the edges that is at a³ ³ ³ and 1ounded below the 1olleis d' dď ď ď
to conform with the outline shape of the sheave or pulley B and effectually pre-
vent the rope fiom getting jambed between the sides of the sheave B and the
sides A As of the fiame and any chafing of the 1ope against the edges of the
sides A¹ A of the fiame
In a modification of this invention the 1olleis d'addare independent of
the sides A¹ A3 of the mast head frame and are carried by side plates F F (see
Figs 5, 6, 7, 8, and 9) which are arranged outside the mast G and serve to
strengthen the same These side plates F¹ F are provided with luga or
bosses f f f f f f f f through which the pins a of the rollers d¹ ª d³d pass.
The main axle pin C of the pulley or sheave passes through these side
plates FF which are by preference curved when viewed in plan (see Figs d
and 9) to correspond with and fit against the mast G and are also by preference
extended above and below the cential pin C so that the latter and the usual
bolt or pin which passes through the side fames at I above the sheave or
pulley B, will also pass through these strengthening plates F1 F
In the further modification of this invention illustrated by Figs 10 and 11
the axle pins e of the rolleis ddddare carried by small brackets or plates H
which are bolted or otherwise fixed to the sides A¹ A of the mast head frame

page_text: above and below the rollers in the proper positions for the 1ope to bear against
the rollers as above described as it passes over the sheave or pulley B
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we are aware that it
has before been proposed to use rolleis in connection with pulley blocks for the
purpose of preventing the abrasion of the 1opes passing therethrough, and
we make no claim to the application of rollers, per se for this purpose, we declare
that what we claim is.-
1 In mast head sheaves and frames the combination with the main sheave B
of the four rollers d d carried by pins in eyes of the fiame sides and ar-
ranged substantially as described and illustrated by Figs 1, 2, 3 and 4 so that
the tope bears against the rollers or some of them as it passes over the main
sheave and is thus prevented from chafing against the fame sides as set forth.
2 In mast head sheaves and frames the confbination with the main sheave B
of the four rollers d' d² d³ d caned by side plates F F which are fixed outside
the mast, said olleis being arranged substantially as described and illustrated
by Figs 5, 6, 7, 8 and 9 so that the rope bears against the rollers or some of them
as it passes over the main sheave and is thus prevented from chafing against the
frame sides as bet forth.
3 In mast head sheaves and frames the combination with the main sheave B
of the four 1ollers d¹ ª d³d carried by small brackets or plates H fixed to the
fiame sides said olleis being arranged substantially as described and illustrated
by Figs 10 and 11 so that the 1ope bears against the rollers or some of them as
it passes over the main sheave and is thus prevented from chaffing against the
fiame sides as set forth
4. In mast head sheaves and frames provided with small rollers for the rope
to bear against as it passes over the main sheave, extending the frame sides
at a a below said rollers to conform with the outline shape of the main sheave
and prevent the rope from chafing and getting jambed between the sides of the
sheave and the sides of the frame substantially as set forth
Dated this 25th day of October 1899
CHARLES BOSWORTH KETLEY,
Agent for the Applicants