Improvements in Locks for Railway Carriages and the like.
Year: 1897

page_text: Date of Application, 22nd Dec.,
4007
Complete Specification Left. 17th June, 1898-Accepted. 23rd July, 1898
Date Opprivation
Complete Specification Left. 17th June, 1898-Accepted. 23rd July, 1898
PROVISIONAL SPECIFICATION.
Improvements in Locks for Railway Carriages and the like.
I, THOMAS WILLIAM WILKES, with the Firm of William Wilkes, of Mill Lane
Works, Bloxwich, Staffordshire, Lock Maker, do hereby declare the nature of
this invention to be as follows:-
My invention has for object improvements in the construction of locks for
railway carriage and other doors and is more particularly applicable to those
known as double action or bang locks.
In carrying out my invention I propose to form the bolt which is pivoted at
its rear or inner end in the usual manner, of one solid piece of metal and around
the square hole through which the handle spindle passes I reduce the thickness
of the bolt to about one third leaving a boss or capstan of sufficient strength
standing up around the square opening.
About this boss or capstan I arrange one or more helical springs formed of
steel or other suitable metal one end of each such spring being arranged to bear
against the inner face of the back flange of the lock or against a stop or stops
provided within the lock.
The other end or ends of these springs is or are arranged to press against the
inside face of the thicker portion of the bolt so as to continually tend to force
the bolt out of the lock-case into a horizontal position.
Upon one face of the thicker or outer portion of the main bolt I form a recess
or side way into which a catch hereafter described is arranged to enter when the
bolt is raised to the required position.
Within the lock and immediately above the main bolt I provide a spindle
capable of revolving within suitable bearings formed at back and front of lock.
This spindle has formed upon or attached to it two suitably shaped projections,
one the catch piece being arranged at a point within the lock so as to be capable
of engaging within the recess or sideway formed upon the bolt, when this latter
is turned back to its striking position, the other or trigger piece being formed
or attached to the outer end of the spindle which projects through the face of
the lock.
Around the inner end of this spindle I arrange a spiral spring one end of
which bears against the side plate of the lock the other being inserted within a
hole formed in the spindle so as to tend to retain the projection or catch piece
on the spindle within the recess or sideway formed in the bolt.
Upon the striking plate is an inclined or tapering projection against which
the bevelled projecting end of the bolt strikes when the door is slammed and
above this at a suitable position is a second projection or lug so shaped as to
cause the spindle and with it the locking device to be partly rotated when the
projection or trigger piece on its outer end comes into contact with this second
projection or lug. By this partial rotation the projection or catch piece is auto-
matically withdrawn from the recess or side way formed in the bolt which is

page_text: then instantly forced down to a horizontal position by the action of the helical
springs and so locks the door.
In a modification of the above I may arrange the helical springs around the
boss or capstan of a bell cranked lever pivoted immediately in the rear of the
bolt axis the action of the springs tending to force the upper arm of the lever
in a forward direction. To this upper arm is attached a link preferably furnished
at its outer end with a roller arranged so as to bear upon a suitably shaped recess
formed upon the inner face or edge of the bolt.
By this arrangement I am enabled to avoid having to reduce the thickness
of the inner portion of the main bolt. And I may, if desired, capsulate or recess
the side plate or plates of the lock for the purpose of securing a greater internal
width for the action of the springs or operating mechanism.
In order to secure as large a diameter as possible for the spindle carrying the
catch device I propose to form a gap or semi-circular recess in the face of the
lock plate into which the spindle with its two projections can readily be dropped,
being secured therein by means of a correspondingly shaped plate formed upon
or attached to the cap or loose side plate of the lock.
In another modification I may arrange for the helical springs which actuate
the main bolt to be arranged on both sides of the bolt in which case I form a
corresponding recess on each side leaving a central web having a projecting boss
or capstan on both sides.
For outside locks a box staple similar to the striking plate above described,
can be used.
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I, THOMAS WILLIAM WILKES, with the Firm of William Wilkes, of Mill Lane
Works, Bloxwich, Staffordshire, Lock Maker, 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:-
My invention has for object improvements in the construction of locks for
railway carriage and other doors and is more particularly applicable to those
known as double action or bang locks
According to my invention I arrange in combination with the main bolt a
catch piece which serves to retain, the bolt within the lock when the door is open
and to release the same upon the door being slammed. For this purpose I form
a recess upon one face of the bolt within which the catch piece automatically
engages when the bolt is withdrawn from out of the striking plate.
And in order that my invention may be fully understood reference is made
to the accompanying drawing upon which,
Figure 1 Represents a side and part front view or elevation of a railway
carriage door lock made in accordance with my invention with side plate removed
the bolt being shewn in the open position.
Figure 2-Is a similar view but represents the bolt in the forward or locked
position.
Figures 3 and 4 being a front and side view of the striking plate:

page_text: Figure 5 shews in detail the particular formation of the main bolt.
Figure 6 represents the catch device.
Figure 7 illustrates a modification of the above, the helical springs being
arranged about the boss of a bell cranked lever which actuates the main bolt. In
this view the bolt is shewn in the open position and in Figure 8 in the closed
position.
Figures 9 and 10 represent a front and side view of the striking plate or staple.
Figure 11 a side elevation of the main bolt detached and
Figure 12 the retaining or catch device.
In carrying out my invention I propose to form the bolt A which is pivoted
at its rear or inner end in the usual manner, of one solid piece of metal and
around the square hole B through which the handle spindle passes I reduce the
thickness of the bolt on both sides so as to leave a central web C from which a
boss D stands up around the square opening B on either side.
About these projecting bosses D I arrange one or more helical springs E
formed of steel or other suitable metal one end of each such spring being arranged
to bear against the inner face of the back flange of the lock or against a stop
or stops provided within the lock.
The other end or ends e of these springs is or are arranged to press against
the inside face a of the thicker portion of the bolt so as to continually tend to
force the bolt out of the lock case into a horizontal position.
Upon one face of the thicker or outer portion of the main bolt I form a
recess or side way F into which a catch hereafter described is arranged to enter
when the bolt is raised to the required position.
Within the lock and immediately above the main bolt I provide a spindle G
capable of revolving within suitable bearings formed at back and front of lock.
This spindle has formed upon or attached to it two suitably shaped projections,
one the catch piece being arranged at a point within the lock so as to be
capable of engaging within the recess or sideway formed upon the bolt, when
this latter is turned back to its striking position, the other or trigger piece gl
being formed or attached to the outer end of the spindle which projects through
the face of the lock.
Around the inner end of this spindle I arrange a spiral spring H one end of
which bears against the side plate of the lock the other being inserted within
a hole formed in the spindle so as to tend to retain the projection or catch piece g
on the spindle within the recess or side way F formed in the bolt.
Upon the striking plate is an inclined or tapering projection I against which
the bevelled projecting end of the bolt A strikes when the door is slammed and
above this at a suitable position is a second projection or lug K so shaped as to
cause the spindle G and with it the locking device g to be partly rotated when
the projection or trigger piece 91 on its outer end comes into contact with this
second projection or lug. By this partial rotation the projection or catch piece
is automatically withdrawn from the recess or side way F formed in the bolt
which is then instantly forced down to a horizontal position by the action of
the helical springs and so locks the door.
In a modification of the above I may arrange the helical springs around the
boss or capstan of a bell crank lever L pivoted immediately in the rear of the
bolt axis the action of the springs E tending to force the upper arm of the lever
in a forward direction. To this upper arm is attached a link preferably
furnished at its outer end with a roller arranged so as to bear upon a suitably
shaped recess a¹ formed upon the inner face or edge of the bolt A.
By this arangement I am enabled to avoid having to reduce the thickness
of the inner portion of the main bolt. And I may if desired capsulate or recess
the side plate or plates of the lock for the purpose of securing a greater internal
width for the action of the springs or operating mechanism.
In order to secure as large a diameter as possible for the spindle & carrying
the catch device 9 I propose to form a gap or semi-circular recess M in the face

page_text: of the lock plate into which the spindle with its two projections can readily
be dropped, being secured therein by means of a correspondingly shaped plate
formed upon or attached to the cap or loose side plate of the lock.
For outside locks a box staple similar to the striking plate above described
can be used.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. In locks for railway carriage and other doors, the combination with a main
bolt recessed on both sides of helical springs pressing against the inner face of
the back flange of the lock case, the other ends of the said helical springs
pressing against the inner faces of the main bolt, said springs tending to force
the main bolt into its horizontal locked position, substantially as described.
2. In locks for railway carriage and other doors, the arrangement of the trigger
on a horizontal axis extending from back to front of the lock, and the formation
of the frame or bearing for this axis with one part secured to the loose side
plate, as described and shewn in the accompanying drawings.
3. In combination with a lock furnished with a main bolt fitted with a side
way recessed on both sides and therein provided with helical springs, and adapted
to be engaged by a trigger for the purpose of locking the bolt in its disengaged
position, a striking plate furnished with a projection or lug against which the
projecting end of the spindle strikes for the purpose of freeing the main bolt,
substantially as described.
Dated this Seventeenth day
For the Applicant,
GEDGE & FEENY,
Chartered Patent Agents, 60, Queen Victoria Street, London, E.C.