Year: 1886

page_text: Date of Application, 29th Nov., 1886
Complete Left, 29th Aug., 1887.
Complete Accepted, 30th Sept., 1887.
WALTER SHELVERTON FROST of 92, Copeland Road Peckham London, in the
County of Surrey, Engineer, do hereby declare the nature of this invention to be
as follows:-
This invention relates to improvements in the construction of locks, with radial
bolts, such as are employed to lock railway and other carriage doors, and for the
fastening of cupboard doors, lockers, and the like purposes.
The object of this invention is the production of a simple, and reliable lock, and
to lessen the liability of the spring breaking, or other derangement.
In constructing a self hasping door lock, I make the bolt at one end, in the
ordinary way, with a projecting boss on each side, the bosses forming the axis, on
which the bolt revolves, and are provided with a square or other shaped hole in the
centre, to receive the handle spindle, the said projecting bosses fitting into holes in the
side plates of the lock, between which the bolt revolves, and at the other end, and in
front of the bolt, I form a tapering projection, which is made to protrude from the front
of the lock for the purpose of hasping the door, like the spring hasp of the ordinary
house door locks, I form cam like projections at the end of the bolt, that is immediately
around the axis bosses, for the purpose of the friction roller to take into, which is
mounted in the end of a lever, that is placed behind the bolt, and parallel with the
lock front, the other end of the lever being jointed, by working on a pin in the side
plate of the lock, at the back of this lever, I place an elliptical, or carriage spring,
composed of one or more plates, or springs, the spring fitting into a bearing made in
the back of the aforesaid lever, and into a bearing pin, or projection in the centre of
the back of the lock, opposite the bearing in the lever. It will be readily understood
that the spring bearing against the bearing pin at the back of the lock, and at the
back of the lever, exerts its power through the roller to the cam of the bolt, in such
manner as to hold the bolt firm, in both its locked, and unlocked positions, but when
in the latter position, the tapering projection should protrude through the front lock
plate, and capable of being turned into the lock case, by the handle, or being forced
in when coming in contact with the striking plate on the door post, the spring always
forcing it to its unlocked position.

page_text: The one bolt in this case performs the double office, of both hasping, and locking.
In constructing locks which are not self hasping, it is only necessary to make the
bo" without the tapering projection.
:
a
in making the lock, in a more simple form, I dispense with the lever, by making
solid spring, having at one end, two bent ears to carry the roller, the other end being
bent, and fitted along the top of the lock, between the side plates, this spring doing the
double duty of both, spring, and lever, and acting on the holt in exactly the same
way, as in the former case. I give preference to the use of the roller, but the arrange-
ment would work well without it, only less durable, by forming the end, of the bolt, of
flats, and corners, working against the plain front of the lever, or spring.
For cupboard doors, lockers, &c. I fix a spindle in the centre of the bolt bosses, for
the purpose of fitting an ordinary round, or other shaped handle to rotate the bolt, or
without the handle, a key of any desired form fitting into a corresponding hole in the
centre of the said bolt bosses, will perform the same object.
T
1
0011
1002

page_text: I WALTER SHELVERTON FROST of 92 Copeland Road Peckham London in the
County of Surrey 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 improvements in the construction of locks with radial bolts
such as are employed to lock railway and other carriage doors and for the fastening of
cupboard doors, lockers and other like purposes.
The object of this invention being to produce a simple and reliable lock and to
lessen the liability of the spring breaking or other derangement.
In order that my invention may be well understood I will describe it with reference
to the accompanying sheet of drawings whereof Fig. 1. shows side view of a lock with
one of the side plates removed. Fig. 2 is like view showing the bolt in locked
position. Figs. 3 and 4 are similar views to Figs. 1 and 2 showing a lock wherein two
bolts are used.
In constructing a self basping door lock I make the bolt a at one end in the
ordinary way with a projecting boss on each side these bosses forming the axis on
which the bolt revolves and through the centre of which is a square or other shaped
hole to receive the handle spindle the said projecting bosses will take into holes in
the side plates between which the bolt works. At the outer end, and in front of the
bolt I form the tapering nose or projection a' which is made to protrude through
the front plate of the lock as shown in Fig. 1. for the purpose of hasping the door like
the spring hasp of the ordinary house door locks.
The inner end of the bolt a; that is, immediately around the axis, has a cam like
formation against which the friction roller 6 will work, said roller b being mounted
in the end of lever c placed behind the bolt and parallel with the lock front, the
other end of lever c being pivoted upon a pin d in the side plate of the lock.
At the back of lever c I place an elliptical or carriage spring e composed of one
or more plates or springs, the said spring fitting into a bearing formed in the
back of levere and upon a bearing pin or projection g in the centre of the back of
the lock and directly opposite the bearing in the lever.
It will be readily understood with reference to the drawings that the spring e bears
against the pin or projection g at the back of the lock and against the back of the
lever c so exerting its power through the roller 6 to the cam formation of the bolt
in such manner as to hold the same firm in both locked and unlocked positions; but
when in the latter position the tapering nose or projection a will protrude through the
front plate as in Fig. 1 and be capable of being turned into the lock case by the
handle, or being forced in when coming in contact with the striking plate on the door
post, the spring e always forcing it to its unlocked position.

page_text: When it is desired to lock the door the bolt a may be thrown out by means of the
handle into position as shown in Fig. 2, the one bolt thus serving the double purpose
of both hasping and locking.
In constructing locks which are not self hasping it is only necessary to make the
bolt without the tapering projection a¹.
When two bolts are used as shown in Figs. 3 and 4 the lever c instead of being
pivoted at its top end will be provided with a pin or stud c¹ which will work in a
slot or groove in the side plates the top end of the lever being provided with a
friction roller which will work against the back end of the hasping bolt a to keep it
in position projecting through the front plate as shown. The friction roller in the
bottom end of this lever works as before described upon the cam formation of the
locking bolt a.
The bolt a is provided with a lug b against which the locking bolt a will bear
when the said bolt is turned for the purpose of bringing bolt a¹ within the lock
case.
In making the lock in a more simple form I dispense with the lever by making
a solid spring has shown in Fig. 5. Upon this spring are two lugs h¹ carrying the
friction roller, the spring being bent and fitted along the top and back of the lock
between the side plates; this spring serves the double duty of both spring and lever
and acts on the bolt in exactly the same way as before described with reference to
Figs. 1, 2, 3, and 4.
It will be understood that this arrangement may be used
without a friction roller by forming the end of the bolt of flats and corners working
against the plain front of the lever or spring.
For cupboard doors lockers and such like I fix a spindle in the centre of the bolt
bosses for the purpose of fitting on ordinary round or other shaped handles to rotate
the holt, or a key of any desired form fitting into the centre of the said bolt bosses
will effect the same object.
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-
Firstly. In a lock for railway carriage and other doors the spring e constructed
and operating as and for the purpose substantially as described and shown in
Fig. 1, 2, 3 and 4 of the drawings.
Secondly. The combination of spring e lever c and bolt a a¹ substantially for the
purpose as herein described with reference to Figs. 1 and 2.
Thirdly. The combination of spring e lever c and bolts a a' constructed and
operating as herein described with reference to Figs. 3 and 4.
Fourthly. The solid spring h with lugs for carrying the roller
as described with reference to Fig. 5.
Dated this 29th day of August 1887.
substantially