IMPROVEMENTS IN LOCKS FOR CARRIAGE DOORS
Year: 1884

page_text: I JOHN EDWARDS Engineer of N° 90.Greenwood Road in the parish of Hackney
in the County of Middlesex, do hereby declare the nature of the Invention for
IMPROVEMENTS IN LOCKS FOR CARRIAGE DOORS, to be as follows:-
:-
My improvements consist in making such locks to fasten carriage doors by
simply pushing the door to, without the intervention of manual labour to turn the
handle of the lock, for this purpose I fix a side lever to the locks, in such manner,
that when the handle of the lock is turned up to open the door, the bolt or tongue
of the lock is caught, and held back by this side lover, and when the door is pushed
into position to be fastened, this side lever is operated by coming in contact with
the door jamb, and allows the tongue or bolt of the lock, to pass forward and fasten
the door; sometimes I make the bolt or tongue of such locks to maintain the
oblique or half cock position, while the door is open, and thus the door is secured
when pushed into position to be fastened, if the handle of the lock is not turned by
hand; to accomplish this object I form two projections on the bolt or tongue of the
lock, and one projection on the crank lever, so that the bolt or tongue when turned
up to open the door, is made to return to the half cock-position, ready to secure
the door, when the door is pushed to, notwithstanding, the handle is not turned
by hand,

page_text: I, JOHN EDWARDS, of 90 Greenwood Road, Hackney, in the County of Middlesex,
do hereby declare the nature of my said Invention for "IMPROVEMENTS IN LOCKS
FOR CARRIAGE DOORS and in what manner the same is to be performed, to bo
particularly described and ascertained in and by the following statement :—
גן
My improvements consist in making such locks to fasten carriage doors by
simply pushing the door into the proper position to be locked without the inter-
vention of manual labour to turn the handle of the lock, for this purpose I fix a
lever a a to the lock by taking a screw B through the front plate of the lock and
through the lever a a which screw is made to screw into a lug of metal c formed
on the top plate of the lock the lever is made to work on the body of the screw
Fig. 6 shows the top plate with the lug of metal c, a suitable blade spring D, which
is rivetted to the lock case is made to force up the short end of this lever, and so
the other end is forced down, and comes in front of the bolt or tongue of the lock
at the part E when the bolt is turned up to open the door. and holds the bolt back
until this lever is forced back by the end of the lever G, coming in contact with
the jamb of the door, and when the lever is thus forced back the bolt is liberated
and pressed forward by the action of the spiral spring's H H and the door is locked
without the intervention of manual labour, the bolt of the lock is not allowed in
any case to go beyond the oblique or half cock position as shewn, and so get on to
the horizontal or central position, but is always maintained in the oblique or half
cock position, and thus off the centre, so that if the bolt should get liberated by
any means while the door is open, and the door is pushed into the position for
locking, it will be securely locked by the self action of the lock, without the inter-
vention of manual labour, suitable spiral springs working on rods H H are used
inside the lock which push against the bolt as shewn at K. K. Fig. 7 and operate
the bolt when required.
:
Sometimes I make the bolt of such locks to maintain the oblique or half-cock
position while the door is open ready to secure the door if it is pushed into the
position to be partially locked or secured, but manual labour is required to complete
the locking the door being secured and safe but not fully locked,' to 'accomplish this
object I form two projections on the bolt of the lock L L Fig 2, and one pro-
jection M on the lever F 3, I use a C spring N Fig. to operate this lever, the
projection M on this lever answers the double purpose of holding the bolt at half.
cock, when the door is open and also for holding the bolt locked, when the door is
fully locked by hand, so that the bolt P Fig 3, when turned back to open the door,
is by means of the top projection L, on the bolt forced against the lever, by
brining the P bolt into a sufficiently backward position to open the door, and when
the handle of the lock is let go, the C spring N which is now in full action, forces
the lever forward, which lever forces the bolt P into the half cock position as shewn
in Fig 3 ready to secure the door when it is pushed into the position to be partially
locked or secured the handle of the lock still retaining the half cock or oblique
position, to indicate that the handle requires turning by hand, to complete the
locking of the door.

page_text: Having now particulary described and ascertained the nature of the said
Invention and in what manner the same is to be performed I declare that what'
I claim is
Making locks for Carriage doors in such manner that the doors by being pushed
to are either fully locked or partially locked substantially as described without
confining myself to the precise details shown as the same may be varied.