A Safety Fastener for Railway Carriage Doors.
Year: 1889

page_text: Date of Application, 28th Jan., 1889
Complete Specification Left, 28th Oct., 1889-Accepted, 21st Dec., 1889
PROVISIONAL SPECIFICATION.
A Safety Fastener for Railway Carriage Doors.
We, DAVID HUTTON, of 34 Forth Place, in the Town and County of Stirling,
North Britain, Commercial Traveller, and ROBERT SORLEY, of Thornhill, in the
County of Perth, North Britain, Implement. Maker, do hereby declare the nature
of this invention to be as follows:-
This Invention relates to a safety fastener for Railway Carriage doors, and has for
its object to prevent passengers opening the carriage door until the train has come to
a complete standstill; our Invention however is such that the arrangement and
working of the door lock at present in use is in no way interfered with, our inven-
tion being supplementary, or an addition to this lock; although we might apply our
invention as a substitute for the lock at present in use.
In carrying out our Invention we employ a governor, constructed upon the well
known principle, for the purpose of carrying out our Invention. The said governor is
actuated by the motion of the carriage through one of the axles, and which com-
municates the necessary rotary motion to the governor ; so long as the carriage is in
motion, the arms of the governor are distended, and in that position they cause the
safety lock, constituting our Invention, to actuate; as soon as the carriage has come
to a standstill the arms collapse, and in so doing cause the safety lock to be released,
and allow thereby the opening of the carriage door in the ordinary way.
The details in the carrying out of this arrangement can be modified in various
ways.
According to one method of carrying out our Invention, we mount the governor
vertically upon a bracket fixed centrally below the carriage floor, at the one end of
the carriage, and in convenient proximity with the nearest axle; the spindle or shaft
carrying the governor is rotated by a crossed band from the axle along the side of
the beam of the carriage, at both sides thereof we mount a rod extending from end
door to end door of the carriage; the catches or bolts are arranged so as to bolt the
bottom of the carriage doors; to actuate each of the said bolts, we mount eccentrics on
the rod, the said eccentrics communicating the required motion to the bolts by a
notion of partial rotation which is given to the said rod by the action of the governor.
The connection of the governor with the longitudinal rods which actuate the bolts,
may be effected by a pair of rods jointed to opposite sides of the governor sleeve and
connected to a crank or short arm keyed upon the one extremity of the longitudinal
bolting rods.
By extending the length of the bolts we may adapt our safety bolts to the middle of
the carriage door in order to bolt the door with greater strength.
JOHNSONS,
115, St. Vincent Street, Glasgow, Petitioners' Agents.
COMPLETE SPECIFICATION.
A Safety Fastener for Railway Carriage Doors.
We DAVID HUTTON of 34 Forth Place in the Town and County of Stirling North
Britain Commercial Traveller and ROBERT SORLEY of Thornhill in the County of
Perth North Britain Implement Maker 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 :-
This Invention relates to a safety fastener for railway carriage doors and has for its
object to prevent passengers opening the carriage door until the train has come to a

page_text: :
complete standstill our invention however is such that the arrangement and working
of the door lock at present in use is in no way interfered with our Invention being
supplementary or an addition to this lock although we might apply our Invention as a
substitute for the lock at present in use.
In carrying out our Invention we employ a governor constructed upon the well
known principle for the purpose of carrying out our Invention. The said governor is
actuated by the motion of the carriage through one of the axles, and which communi-
cates the necessary rotary motion to the governor; so long as the carriage is in
motion, the arms of the governor are distended, and in that position they cause the
safety lock, constituting our Invention, to actuate; as soon as the carriage has come
to a stand-till the arms collapse, and in so doing cause the safety lock to be released,
and allow thereby the opening of the carriage door in the ordinary way.
The details in the carrying out of this arrangement can be modified in various
way.
According to one method of carrying out our Invention, we mount the governor
vertically upon a bracket fixed centrally below the carriage floor at the one end of the
carriage, and in convenient proximity with the nearest axle; the spindle or shaft
carrying the governor is rotated by a crossed band from the axle; along the side of
the beam of the carriage, at both sides thereof we mount a rod extending from end
door to end door of the carriage; the catches or bolts are arranged so as to bolt the
bottom of the carriage doors; to actuate each of the said bolts, we mount eccentrics
on the rod, the said eccentrics communicating the required motion to the bolts by a
motion of partial rotation which is given to the said rod by the action of the governor.
The connection of the governor with the longitudinal rods which actuate the bolts,
may be effected by a pair of rods jointed to opposite sides of the governor sleeve
and connected to a crank or short arm keyed upon the one extremity of the
longitudinal bolting rods.
By extending the length of the bolts we may adapt our safety bolts to the middle
of the carriage door in order to bolt the door with greater strength.
We will now describe with reference to the accompanying drawing a mode of
carrying out our invention but we would have it understood that we do not limit
ourselves to the precise details hereinbefore described as they may be varied without
departing from the essential features of our invention.
Figure 1 is a part side elevation of a railway carriage having our invention applied
thereto Figure 2 is an end elevation and Figure 3 a plan of the same.
A is one of the axles of the carriage wheels a, to which we mount in any suitable
manner a governor B preferably such a one as is shown that is having three or more
arms which are pivotted at on the brackets the said arms having a suitable
ball mounted at their one end and suitably extended beyond the pivots ; as shown
at one or more of the ends or points of the extended arms, when the carriage is at
a standstill, press against a circular shaped disc C, which is provided with a suitable
hinged piece c, so as to allow of the rising and falling of the axle, this disc is mounted
on the one end of double or two armed lever D, which traverses longitudinally
underneath part of the carriage and is carried by a suitable bracket d and pivot d
the other end of this lever being connected to the one end e of another two armed
lever E, this lever being carried by the bracket and pivot e¹. To each end of this
lever E we mount suitable cross links F F¹ one of which extends to either side of
the carriage, the other ends of these cross links are connected at ff' to the lower ends
of the crank levers G G which are mounted in any convenient manner to the
rods or tubes H H these rods which extend from end to end of the carriage are
carried in suitable brackets which allow of them being partially rotated; the
other ends of these crank levers G G are connected by suitable links J and levers j
to counterpoise weights J'.
The rods H H have mounted on them the required number of safety bolts K the
said bolts being mounted immediately underneath each door and preferably having a
small bracket fixed to the rod by a bolt and nut the end of the said bolt being formed
with an eye for allowing the double end of the bolt proper K to be jointed to and

page_text: having suitable receptacles formed in the doors L for receiving the ends of the
said bolts K.
The whole arrangement being such that when the carriage is in motion the
governors arms and balls are distended and the curved ends are closed in towards
the axle as shown at M Figures 2 and 3 and the disc C is forced against them through
the acting of the counterpoise weights J' which at the same time gives the necessary
partial rotation to the rods H H so as to push the safety bolts upwards into the
doors and when the carriage comes to a standstill one or more of the curved arms 6₁
press the disc C away from them thus counteracting the action of the weights J¹ and
at the same time withdrawing the safety bolts this position being shown at P
Figure 2.
We may vary the arrangement of engaging the doors, by employing pivoted catches
for example, instead of the bolts k; under this modification the catches would be
pivoted upon the side of the carriage frame, the one arm of the pivoted catch
securing the carriage door by the operating of the opposite arm through the medium
of similar mechanism to that described for operating the bolts or of obvious
modifications of that mechanism.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. The general arrangement and construction of apparatus for automatically locking
and unlocking railway carriage doors and the like substantially as and for the
purposes herein before described.
2. The arrangement and construction of apparatus for automatically locking and
unlocking railway carriage doors and the like as described with reference to the
accompanying drawings.
Dated the 28th law of October 1980
JOHNSONS,
Agents.