Improved Lock for Safety Bicycles and the like Vehicles.
Year: 1897

page_text: [Communicated from abroad by ANDRÉ GOBRON, of No. 6 Cité d'Hauteville, Paris, in
the Republic of France, Mechanical Engineer.]
Improved Lock for Safety Bicycles and the like Vehicles.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 322, High Holborn, in the County of Middlesex, 6, Lord Street,
Liverpool, and 6, Bank Street, Manchester, both in the County of Lancaster, and
Lower Temple Street Birmingham, in the County of Warwick, Civil Engineer, do
hereby declare the nature of this invention to, be as follows:―
This invention relates to the application of a safety lock bolt to safety bicycles,
tricycles and the like so as to stop the pedal movement and in this manner
prevent the theft of the machines provided with this bolt.
The lock is composed of an envelope upon which are cast or otherwise attached the
side walls as well as a dividing partition. The wall and the partition aforesaid are
traversed by a strong round bolt forming the projecting part of the lock. The wall
possesses internally a barrel divided in the direction of its axis by an opening which
is the prolongation of the barrel and through which the key of the lock penetrates.
The end of the bolt at the side of the wall bears a disc pierced with two holes.
Between the partition and the wall the bolt bears a circle upon which are
fixed two bars the ends of which screwed into the circle are rounded, and pass a little
beyond this circle in order to fit into the holes of the disc. Spiral springs placed
around the bars between the partition and the circle tend constantly to press this
latter against the disc and thus to cause the bolt to return into the body of the
lock.
Upon the envelope is placed a projection one of whose faces, is placed at such a
distance that when the bolt is shot out to its fixed. position this face corresponds
o the front face of the disc.
The disc possesses a notch and this allows of it passing beyond the projection when
he bolt is displaced longitudinally. This effect is obtained by the force transmitted
o the disc by means of the key.
The disc is moreover provided with a bar the base of. which may vary in section
ccording to the form of the key employed.
The keyhole for the key of the bolt is closed by a small key plate.
The lock is attached to the safety bicycle or other vehicle at each of its ends by
vo collar straps united by a bolt and screw clamp or by other suitable means.
The key is formed of a hollow barrel bearing at its end two flat parts provided with
ints. The flat parts may have cavities of any desirable kind corresponding to
ojections formed upon the disc so that each bolt may have a key which will fit it
one.
The operation of the device is as follows:-
The bolt having been secured unon a sofatu hinnat

page_text: manner as to restrain its driving gear it is operated in the following manner :-
After having turned the key plate so as to uncover the key hole the key is intro-
duced. The barrel directs the points towards the holes of the disc and prevents
by means of its rib any deviation of the key. This key is then pushed until a full
resistance is felt; this push displaces the bolt which presents the front face of its
disc beyond the projection, then the key is turned half a turn, keeping up the
pressure thereon to prevent its slipping back. This half turn of the key effects a
half turn of the bolt which then presents the plane part of its disc before the
projection and the bolt being held back by this cannot any longer slip backwards. The
resistance produced by the introduction of the rounded heads of the bar passing
the circle into the holes of the disc stops and fixes the half turn of the key. In
consequence of this the bolt is pushed out sufficiently to engage between the arms
of the gear wheel which controls the bicycle wheel and renders the gearing of the
same immovable.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign Patent 2
Solicitors, 322; High Holborn, in the County of Middlesex, 6, Lord Street, Liverpool,
and 6, Bank Street, Manchester, both in the County of Lancaster, and Lower Temple
Street Birmingham, in the County of Warwick, Civil 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 :—
This invention relates to the application of a safety lock bolt to safety bicycles,
tricycles and the like so as to stop the pedal movement and in this manner prevent
the theft of the machines provided with this bolt.
Referring to the accompanying drawing
:-
Figure 1 represents a partial perpective view of a safety bicycle with the safety a
bolt applied thereto..
Figure 2 shows a longitudinal section of the bolt in the open position.
Figure 3 shows a plan view of Figure 2 the cover being shown in section.
Figure 4 is an end view of Figure 2.
Figure 5 shows a section on the line x-y of Figure 2.
Figure 6 shows the bolt in the locked position.
Figure 7 shows the locking key.
The lock is composed of a box A upon which are cast or otherwise attached the side
walls B C as well as the dividing partition D. The wall B and the partition D
aforesaid are traversed by a strong round bolt E forming the projecting part of the 4
lock. The wall C possesses internally a barrel a divided in the direction of its axis
by an opening b which is the prolongation of the barrel a and through which the key
of the lock penetrates. The end of the bolt E at the side of the wall (bears a
disc F pierced with two holes ff.
Between the partition D and the wall C the bolt bears a washer or ring H upon 4
which are fixed two bars I the ends of which screwed into the ring H are rounded, and
project a little beyond this ring in order to fit into the holes ff of the disc F. Spiral
springs J placed around the bars I between the partition D and the ring H tend

page_text: constantly to press this latter against the disc F and thus to cause the bolt to return
into the body of the lock.
Upon the box A is placed a projection K one of whose faces, that marked k, (Fig. 6)
is placed at such a distance that when the bolt E is shot out to its fixed position this
face k corresponds to the front face of the disc F.
The disc F possesses a notch L and this allows of it passing beyond the projection K
when the bolt E is displaced longitudinally. This effect is obtained by the force
transmitted to the disc F by means of the key G.
The disc F is moreover provided with a bar f¹ the base of which may vary in
section according to the form of the key employed. The ring H possesses a notch
corresponding to that of L of the disc F.
All these organs are covered by a lid M screwed upon the box A by means of
screws m.
The keyhole C¹ for the key of the bolt is closed by a small keyhole cover N hinged
on the side wall C.
In order to attach the lock to the safety bicycle or other vehicle the part A is
provided at each of its ends with two collar straps P O united by a bolt and screw
clamp . The part P possesses a hinge p in order to facilitate the mounting of the
lock upon the tubes of the safety bicycle or the like. The tightening of this collar
upon its corresponding tube R is obtained by means of the screw V placed upon a
suitable support T.
The collar O is formed of a thin strip which grips its corresponding tube $ when
the bolt Q is screwed up. Any other method of fixing the bolt might also be
employed, I describe this merely by way of example.
The key G is formed of a hollow barrel t bearing at its end two flat parts h h
provided with points g g. The flat parts h h may have cavities of any desirable kind
corresponding to projections formed upon the disc F so that each bolt may have a
key which will fit it alone.
The operation of the device is as follows:-
The bolt having been secured upon a safety bicycle so as to lock this in such a
manner as to restrain its driving gear it is opened in the following manner:-After
having turned the small plate N so as to uncover the key hole C¹ the key G is
introduced. The barrel a directs the points g g towards the holes ff of the disc F
and prevents by means of its rib D any deviation of the key G. This key is then
pushed until a full resistance is felt; this push displaces the bolt E which presents
the front face of its disc F beyond the projection k, then the key is turned half a
turn, keeping up the pressure thereon to prevent its slipping back. This half turn
of the key G effects a half turn of the bolt E which then presents the plane part of
its disc F before the projection E and the bolt being held back by this cannot any
longer slip backwards. The resistance produced by the introduction of the rounded
heads of the bars I passing the ring H into the holes ff of the disc F stops and fixes
the half turn of the key G. In consequence of this the bolt E is pushed out
sufficiently to engage between the arms of the gear wheel which controls the bicycle
wheel (See Fig. 1) and locks the gearing of the same.
In order to unlock the bolt after having introduced the key it is only requisite to
make a half turn so as to present the notch L of the disc F before the projection K
and enable the bolt to slip back under the pressure of the springs J.
The bolt E might also be constructed to revolve one or more turns by being threaded
as a screw, the projection K being dispensed with.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is :-
A new safety lock for safety biaycles, and the like the said lock being characterised
by having a bolt formed of a round bar provided with a disc having a notch L and
capable of longitudinal displacement by the action of a key of suitable shape, and
possessing a movement of rotation upon itself so as to effect the application of the

page_text: plane part of the disc F beyond the projection K so as to prevent the return back of
the bolt E. substantially as described.
Dated this 19th day of October 1897.
WM. P. THOMPSON & Co.,
Of London, Liverpool, Manchester, and Birmingham.
Patent Agents for the Applicant.
WM. P. THOMPSON & Co.,
Of London, Liverpool, Manchester, and Birmingham.
Patent Agents for the Applicant.