Improvements in "Fork Crowns" for Cycles and in the Manufacture of the same.
Year: 1899

page_text: Date of Application, 18th Aug., 1899
Complete Specification Left, 17th May, 1900-Accepted, 23rd June, 1900
PROVISIONAL SPECIFICATION.
Improvements in "Fork Crowns" for Cycles and in the Manufacture
of the same.
We, WILLIAM Вown, of Overdale Villas, Sutton Street, Aston, juxta Birming-
ham, in the County of Warwick, Works Manager, and HENRY GREEN, Gladstone
Road, Sparkbrook, Birmingham, aforesaid, Chartered Accountant, do hereby
declare the nature of my invention to be as follows:-
to manufacture.
25
Our invention has for its object improvements in "fork crowns
for cycles
and in the manufacture of the same which are made in one piece from a stamp-
ing casting or forging and which will be found stronger and simpler and cheaper
"for cycles
In carrying our invention into practice we make our "fork crowns
from a casting or forging but preferably from a stamping formed and shaped
by suitable dies with lugs or projections on the under side upon which the
front forks of a cycle fit. A neck or shoulder is also formed on the centre at
the top to which the steering socket is brazed. A hole is then drilled centrally
through this neck or shoulder and through the body portion of the "
into which the steering socket tube fits. The metal in the centre of the body
portion on either side of this hole is then cut away by suitable tools so as to
lighten the "crown" and on the exterior of the front and back of the
or one side only a counter-sink may be formed for the reception of a thin metal
** box
plate which when fitted in position forms what is known in the trade as a
crown" which is both light strong and rigid.
Dated this 17th day of August 1899.
*
crown
crown
5
""
Improvements in "Fork Crowns" for Cycles and in the Manufacture
of the same.
We, WILLIAM Bown, Overdale Villas, Sutton Street, Aston, juxta Birming-
ham, in the County of Warwick, Works Manager, and HENRY GREEN, Gladstone
Road, Sparkbrook, Birmingham, aforesaid, Chartered Accountant, do hereby
declare the nature of our said invention and in what manner the same is to be

page_text: performed to be particularly described and ascertained in and by the following
statement:-
39
Our invention has for its object improvements in "fork crowns
for cycles
and in the manufacture of the same which are made in one piece from a stamp-
ing casting or forging and which will be found stronger and simpler and cheaper
to manufacture.
In carrying our invention into practice we make our "fork crowns
"for cycles
from a casting or forging but preferably from a stamping formed and shaped
by suitable dies with lugs or projections on the under side upon which the
front forks of a cycle fit. A neck or shoulder is also formed on the centre at
the top to which the steering socket lower cup or ball race is brazed or fitted.
A hole is then drilled centrally through this neck or shoulder and through the
body portion of the " crown "into which the steering socket tube fits. The
metal in the centre of the body portion is then cut away by suitable tools so as
to lighten the crown and on the exterior of the front and back of the crown
or one side only a countersink may be formed for the reception of a thin metal
plate which when fitted in position forms what is known in the trade as a "box
crown which is both light strong and rigid.
"
66
"
In order that our invention may be more clearly understood and easily carried
into practical effect we have appended hereunto a double sized sheet of drawings
upon which we have illustrated our improved "fork crown."
Figure 1 is a front elevation of our
Figure 2 is a plan view of Figure 1.
<<
fork crown."
39.
Figure 3 is a longitudinal sectional view of Figure 1.
"
"
Figure 4 is a similar view to Figure 1 shewing our crown with thin metal
plates fitted in position so as to box the centre portion in.
Figure 5. is a cross sectional view of Figure 4.
"
"
In carrying our invention into practice we make our "fork crown" F from
a casting or forging but preferably from a stamping formed and shaped by suit-
able dies with the lugs or projections f¹ f' on the underside upon which the
front forks of a cycle are brazed or otherwise secured. The neck or shoulders f²
is also formed at the centre on the upper portion and to this neck or shoulder
the lower cup or ball race which forms part of the ball head of the cycle is
brazed or fitted. The hole f³ is drilled centrally through this neck or shoulder
and through the body portion of the " crown into which the lower end of the
tube passing down the steering socket or ball head is secured either by brazing
or otherwise the upper end of this tube protrudes slightly above the upper cup
or ball race of the "head" to receive the usual adjusting nut. The metal in the
centre of the body portion is cut away by suitable tools to lighten the crown
leaving the hole or opening f* and into these openings we fit the thin metal
plates of the counter sink f being formed around the edge of the opening for
the reception of these plates so that when fitted in position they are flush with
the sides of the "crown" as clearly shewn at Figure 5. If desired we may fit a
thin metal plate in the front of the " crown only leaving the other side open
but we prefer to fit our crown "with two plates thus forming what is known
in the trade as a 'box crown "which is both light strong and rigid.
66
6
"
"
"
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed I declare that what
I claim is:-
CLAIMS.
First The improvements in "fork crowns" for cycles and in the manufac-
ture of the same consisting essentially in forming such "crowns" in one part
hollowed out in the centre and having lugs on the underside in the manner
substantially as herein set forth and as shewn upon the accompanying drawings.
Second: "Fork crowns" for cycles formed in one part and having lugs on
the underside and a neck or shoulder on the upper portion for the reception of

page_text: the steering socket tube the centre portion being hollowed out and provided
either on one or both sides with a rebate or recess into which a thin metal plate
fits in the manner and for the purpose substantially as herein set forth and as
shewn.
WILLIAM BOWN,
HENRY GREEN.
By George Barker,
Fellow of the Chartered Institute of Patent Agents,
Agent for Applicants, 77, Colmore Row, Birmingham.