Improvements in Locks for Cycles and other Mechanism.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Locks for Cycles and other Mechanism.
We, JOHN BRANDON CHANCELLOR, of Ivy Holm, Twickenham, in the County
of Middlesex, Barrister at Law, and SAMUEL WILLIAM LEWIS, of Bath House,
Twickenham, aforesaid, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to locks which are applicable generally for locking two
pieces of mechanism or two parts together to prevent movement of one part with
respect to the other. Our said invention is specially adapted as a cycle lock for
which purpose its small compass and neatness particularly fit it, and we will
describe the invention as adapted for locking the steering mechanism or front
fork of a cycle, premising that it can be equally well applied for locking other
of the moving parts of the cycle.
Our improved lock, in the preferred form, comprises a barrel and a cam or disc
contained within a recess in the barrel and having its surface normally flush with
that of the barrel. A key is provided to turn the cam or disc to cause it to pro-
ject from the side of the barrel when the parts to which it is applied are to be
locked. In some instances the key is constructed to push back or disengage
certain locking bolts or the like so as to allow the cam or disc to turn. The cam
or disc turns about an axis which is parallel to the axis of the barrel, and the
key is inserted from the end of the barrel and engages with the cam in any suit-
able manner. A recess is provided in the barrel when necessary to allow the
key to turn, and the construction is preferably such that the key cannot be with-
drawn except when the cam or disc is in the locking position, so that the user
must lock the parts before he can withdraw the key. When the beforementioned.
locking bolts are not used, a spring pin or like device is provided to engage with
the cam or disc in its locked and unlocked positions in order to prevent accidental
turning of the disc. The flat faces of the disc abut close against the sides of the
recess in the barrel and hence it will be very difficult to pick the lock.
The aforesaid barrel is inserted transversely through a hole in the upper or
lower member of the cycle frame adjacent to the steering head, and is held in
place by a screw or otherwise. Its outer end is flush with the surface of the tube
so that there are no projecting parts and the lock and tube are finished off together.
A slot is cut through the tube containing the fork, and through the fork itself
opposite the cam or disc so that when the latter is turned, it projects through
the said slots and locks the front fork thereby preventing the use of the latter
for steering purposes.

page_text: We, JOHN BRANDON CHANCELLOR, of Ivyholme, Twickenham, in the County of
Middlesex, Barrister at Law, and SAMUEL WILLIAM LEWIS, Bath House, Twicken-
ham, aforesaid, Esquire, 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:-
This invention relates to locks which are applicable generally for locking two
parts or elements of a machine, or two pieces of mechanism together, so as to
prevent the rotation of the one element with respect to the other, and is, by reason
of its compact form, neatness and simplicity of action, particularly adapted for
use as a steering wheel or front fork lock for cycles, the application to which
purpose we will hereafter describe, although it is to be understood that the im-
provements are equally applicable for locking other moving parts of cycles.
The improved lock consists essentially of a barrel casing or body provided with
an excentrically mounted disc or rotating bolt contained within a recess in the
said barrel and being so arranged that when in its normal or withdrawn position,
its periphery comes flush with the surface of the barrel, whilst when turned by
means of a suitable key provided for the purpose, the said disc is made to turn
about its axis, which is parallel to the axis of the barrel, and to project from the
recess wherein it normally lies and engage with a gap or suitable formation in
the steering column or other element to be locked. The key is inserted from
the end of the barrel and is engaged with the locking disc in any suitable manner,
whilst supplementary bolts, detents or equivalent means may be made to engage
the said bolt disc to retain it in its shot or withdrawn positions and to be pushed
back, from therewith by the act of pushing in the key. The casing of the lock
is also constructed in such a manner that the key cannot be withdrawn except
when the bolt disc is in its locking position, so that the user must lock the parts
before he withdraws the key.
. Figure 1 of the accompanying drawings represents a part of the steering head
of a. safety bicycle, provided with a steering-column lock constructed, arranged
and operating according to one form of our invention.
Figure 2 represents a longitudinal vertical section, partly in clevation, of the
said head, with the lock in section adjacent to the disc bolt, which is shown in
its withdrawn position, leaving the steering column free to rotate with the ball
head sleeve.
Figure 3 is a like view as Figure 2, but showing the bolt disc shot, and passing
through a gap in the walls of the ball head sleeve or fixed element and engaging
in a coinciding gap in the steering column or movable element, thereby locking
the one part to the other.
Figure 4 is another similar view to Figure 2, but with the steering column
turned to a position at right angles to that shown in the said Figure 2 in order
to better exhibit the gap therein with which the bolt engages.
Figure 5 represents, upon an enlarged scale, a transverse section of Figure 2,
upon the dotted line x, showing the bolt disc in its normal or withdrawn. position,
leaving the steering column free to turn within the fixed ball head sleeve.
Figure 6 is a like section as Figure 5, but showing the bolt shot to engage
with the coinciding gaps of steering column, and ball head sleeve and lock the
said parts together.
Figure 7 represents an elevation of the key employed with this form of our
invention.

page_text: Figure 8 is an elevation of the key-hole end of the lock.
The same letter of reference indicate corresponding parts in the said Figures 1
to 8.
a is the ball head sleeve of a safety bicycle, connected by a junction lug a¹, to
the front diagonal member a², and having located interiorly within it, the steer-
ing column 6 the upper end of which is secured in the usual way to the stem of
the handle bar, whilst the lower end carries the front forks b¹. Coincident gaps
or holes a³, 63, are made in these members in such a position as to admit of them
being engaged by the bolt c¹, of the lock c, which is contained or enclosed within
a barrel or casing ², disposed transversely across the junction lug a¹, immediately
behind the fixed sleeve a, and being secured in this position by a screw d, passed
through the walls of the said lug and made to engage with a screwed hole in a.
block ³, inserted within one end of the casing, between which said block and
a like one, at the opposite end, in a recess c³, coinciding with a gap c, in the side
of the casing, and within which the bolt c¹, consisting of a disc or circular block
excentrically mounted upon an axis c², situated within, and in a direction parallel
to the casing, is disposed or lies, with its periphery normally being flush with
the outer surface of the said casing. A key hole 8, is made through the block c,
and terminates in a clearance c?, at the inner end, which admits of the crank-
ended key e, after being passed up the key hole and being engaged, by its bit e¹,
with the recess clo, in the side of the bolt, being turned through a partial rotation,
carrying the bolt round with it and causing the same to extend through the side
gap, and to engage the locking gaps in ball head and steering column respec-
tively, (as shown in Figure 5) in which position it is held or retained by a conical
sinking e, in its side being engaged by the conical end of a supplementary and
spring-actuated bolt or detent f, disposed in a longitudinal hole c¹², in the end
block, of the barrel casing. When in this position the end of the key (which
is made hollow at e², so as to take over the post extension c¹³, of the axis c',) comes
coincident with its key hole, and can be withdrawn from the lock,
but when the bolt has been withdrawn from locking engagement with
the steering column (as represented in Figure 6) by the turning of the key
in the reverse direction, then as the cranked end of the said key no longer coin-
cides with the key-hole it cannot be withdrawn so long as the machine is unlocked,
the withdrawal of the same only being permissible, in this form of our invention,
when the bolt has been shot.
The flat faces of the disc bolt are made to abut close up against the inner ends
of the blocks constituting the sides of the recess, thus rendering it a very difficult
matter to pick the lock, whilst the outer ends of the casing come flush with the
outer surface of the part of the framing wherein it is disposed, whereby the
presence of unsightly projections is avoided.
Figure 9 represents a transverse longitudinal section of a modified form of
our invention, in which a different arrangement of supplementary locking means
for retaining the bolt in its shot position is employed. The said view shows
the bolt shot but in a condition with regard to the, supplementary lock, which
will admit of it being withdrawn when the key is turned.
Figure 10 is a like section as Figure 9, but showing the key removed and the
disc bolt retained in its locking position by the supplementary catch.
Figure 11 represents the key separately, and
Figure 12 shows another sectional view as in Figures 9 and 10, but with the
bolt withdrawn.
a is the ball head, 6 the rotatable steering column, c the lock, c¹ the bolt disc,
the casing, with opposite end blocks c³, c, and recess c, wherein the bolt, which
is excentrically mounted upon the axis c', normally lies. e is the key, crank-
ended as before, which is introduced into the lock by the key-hole 8, and has a
bit e', which engages with the hole clo, in the bolt for shooting or withdrawing
the same. f is a supplementary locking pin, located in a hole c, in the block c³,
and impelled forward by a spring f¹, which causes the nose end f, to be engaged

page_text: with the hole co, on them coming coincident with one another and when the key
is withdrawn from the lock, which can only be effected after the disc bolt has
been shot, so that the said disc bolt is retained in its locked position, after the
key has been taken out, by the engagement of the supplemental pin with it, (see
Figure 10) whilst when the key is again introduced, its bit e¹, enters the hole c¹0,
and impinges against the end of the said pin, thereby forcing it out of engage-
ment with the bolt (as seen in Figure 9) which may be again withdrawn into
the position shewn in Figure 12.
We wish it to be understood that we may employ any suitable arrangement
of supplementary catch, detent or the like, actuated either by a spring or by hand,
for locking the bolt, and that the key may be of any suitable kind and be made
to engage with or act upon the bolt in a variety of ways, and further that our
invention is equally applicable to locks for various parts of cycles other than to
ball heads and for securing lamps and other accessory fittings to velocipedes and
like carriages, and also for temporarily locking together a fixed and a movable
part, or two movable parts or elements, of any other machinery or mechanism,
its application to these several purposes differing in no essential respect from
its application to ball head steering locks as herein described.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what
we claim is:-
First A lock for cycles and other mechanism having an excentrically
mounted rotating bolt, normally lying within a casing or barrel, but capable of
being shot into engagement with a part to be locked, by a key.
Secondly: A lock for cycles and other mechanism having an excentrically-
mounted rotating bolt, normally lying within, or flush with, a casing or barrel,
but capable of being shot into engagement with the part or element to be locked
by a key, and retained in its shot position by a spring actuated or other supple-
mentary bolt, pin, detent or equivalent.
Thirdly-In locks for cycles and other mechanism as referred to in the pre-
ceding claims, the employment of a key having a cranked end provided with a
bit or peg which engages into and turns with, the rotating bolt, substantially as
described and set forth.
Fourthly: In locks for cycles and other mechanism having rotating bolts,
the construction, arrangement, and combination of the parts of the casing or barrel,
with key hole and turning clearance, whereby the key can only be withdrawn
when the bolt is in its shot position, substantially as described and set forth.
Dated this 2nd do
Ch 1000
JOHN BRANDON CHANCELLOR,
SAMUEL WILLIAM LEWIS,
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicants.