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

page_text: PROVISIONAL SPECIFICATION.
Improvements in Locks for Railway Carriage Doors and the like.
I, GEORGE ABRAHAM SLACK, Dentist, No. 5, Upper Chambers, Market Hall,
Chesterfield, and BOWER MARRIOTT, Mechanic, Boythorpe Villa, Derby Road, near
Chesterfield, in the County of Derbyshire, do hereby declare the nature of this
invention to be as follows:-
The compressed and small space occupied by tliis lock and bolt with indicator
combined which works indicator inside of door and shows to passengers in railway
carriages if any neglect has been by railway officials in not making the bolt secure
(which is the case in ordinary arrangements now in use in railway carriages and
been the cause of disaster and loss of life).
This shows at sight to passengers in the carriage if this neglect has been made
by the indicator which points to Open or Safe and also gives the oppertunity to
passengers inside of carriage to secure the door by pull handle inside upon which
the bolt is shot into casement of door and indicator immediately denotes Safe.
The indicator plate being secured to the inside of door, allowing the end of
spindle to pass through having indicator finger secured to same parallel to handle
which points to Safe lettered on indicator plate.
The indicator bar which slides upon the face of indicator plate (the word Open
lettered upon indicator bar) passes over the word Safe, when the door being not
secure or open.
The bar being fastened to a rod which is connected to a button, working inside
of barrel, there being a spiral spring behind pushing the button out. The catch
plate pressing the button into barrel when the bolt is secure, thereby denoting Safe.
There being a casement or shield with glass inserted to protect the same.
The spring bolt which is worked by handle is inserted into lock case sliding
between two ribs.
The bolt being recessed, to receive cam which having teeth in it, corresponding
to teeth on bolt.
There being a slot hole, to allow spindle to pass through allowing bolt lo slide
backwards and forwards the required distance, having arch springs pressing against
bolt at two points.
The lock bolt placed above spring bolt in the same casement, (separated by a rib)
teeth being inserted in bolt corresponding to teeth of cam, is having a boss on
both sides acting for bearings, the one let into casement of lock the other boss
passing through the plate of casement (the above mentioned plate is screwed to
casement holding the bolts into their proper positions) in the end of boss there
being a square hole to receive key.
August 20th 1807
GEORGE ABRAHAM SLACK.
BOWER MARRIOTT.

page_text: Improvements in Looks for Railway Carriage Doors and the like.
I, GEORGE ABRAHAM SLACK, Dentist, 46, Brunswick Street,. Sheffield Road,
Chesterfield, and BOWER MARRIOTT, Mechanic, Boythorpe Villa, Derby Road, near
Chesterfield, in the County of Derbyshire.
I, the above named GEORGE ABRAHAM SLACK, Dentist, late of 5, Upper Chambers,
Market Hall, Chesterfield, Derbyshire, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
The compressed and small space occupied by this lock and bolt with indicator
combined which works indicator inside of door and shows to passengers in railway
carriages if any neglect has been by railway officials in not making the bolt secure
(which is the case in ordinary arrangements now in uso in railway carriages
& been the cause of disaster and loss of of life).
This shows at sight to passengers in the carriage if this neglect has been made
by the indicator which points to Open or Safe and also gives the oppertunity to
passengers inside of carriage to secure the door by pull handle inside upon which
the bolt is shot into casement of door and indicator immediately denotes Safe.
Sheet 1. The indicator plate DP being secured to the inside of door allowing
the end of spindle Z to pass through having indicator finger Q secured to same
parallel to handle I which points Safe lettered on indicator plate D) P.
The indicator bar G which slides upon the face of indicator plate DP (the
word Open lettered' upon indicator bar G passes over the word Safe when the door
being not secure or open.
The bar G being fastened to a rod E which is connected to a button N working
inside of barrel T there being a spiral spring ✪ behind pushing the button N out.
The catch plate M pressing the button into barrel T when the bolt SS is secure,
thereby denoting Sate.
There being a casement or shield FP with glass inserted to protect the same.
Sheet 2. The spring bolt S'S which is worked by handle H is inserted into lock
case M M sliding between two ribs RR. The bolt SS being recessed to receive
cam which having teeth in it corresponding to teeth on bolt SS.
There being a slot hole to allow spindle Z to pass through allowing bolt S S to
slide backwards and forwards the required distance, having arch springs KS
pressing against bolt S S at two points.
The lock bolt U placed above spring bolt in the same casement, separated by a
rib R) teeth being inserted in bolt U corresponding to teeth of cam B it having a
boss on both sides acting for bearings the one let into casement of lock M M the
other boss V passing through the plate of casement.
(The above mentioned plate is secured to casement holding the bolts into their
proper positions) in the end of boss V there being a square hole F' to receive key, PH
pull handle to close door.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is
Bolt SS and indicator which works from bolt SS and shows with indicator
finger Qinside of carriage Safe or Open.
1711
1000
GEORGE ABRAHAM SLACK.
BOWER MARRIOTT.