Improved Carriage Lock.
Year: 1889

page_text: Date of Application, 2nd Dec., 1889
Complete Specification Left, 18th Aug., 1890-Accepted, 27th Sept., 1890
PROVISIONAL SPECIFICATION.
Improved Carriage Lock.
I, WILLIAM HAMILTON BLAKENEY of Edengrove, Arbroath Road, Dundee, in the
County of Forfar, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in door locks, and is specially applicable
to railway carriage doors, although not under any circumstance do I confine myself
to such.
The objects of my invention are to simplify the arrangement of the lock, and the
general construction of same. specially with the view of being able to take out the
internal working parts for the purposes of repair, without the necessity of taking
the lock out of the door. In a lock constructed to operate with spiral springs,
propose to introduce round ended pins, which may be rather less in length than the
length of the springs when compressed. These pins are placed within the springs, to
keep said springs from bending; the round ends being to keep the pins from catching
the coils of the springs when same are being compressed.
According to one modification, I carry out my invention in the following
manner :-
Within a case, fitted into the frame of the door is a bolt which is made to shoot
out by means of a spring or springs, and its movements may be controlled by
outside and inside handles, upon the shaft of which is a camb or crank. The bolt
is made with a projection on its side, its top, or its hottom, which engages with a
catch-either on the case, or on the cover of the case-as the bolt is made to slide
back against the resistance of the spring or springs, and thus keep it there until the
door is in what I will call the closed position, as opposed to wide open.
In opening
the door, the bolt being made to protrude some distance beyond the face of the lock,
the handle has to be turned further than is actually necessary so that the catch may
have time and space to fall into its place. In closing, as previously mentioned, the
side, the bottom, or the top of the bolt comes against a plate on the fixed door post,
and immediately afterwards the bolt comes opposite its socket, and is pushed therein
by means of the before mentioned spring or springs. The camb or crank may be
arranged in such a manner as to give a varying backward pressure to the bolt,
making it difficult to commence to open the door, by pushing back the said bolt.
This camb or crank however, may be placed in any convenient position to operate
said bolt. Under certain circumstances I propose to screw the shaft of the handle
into the camb or crank. I also propose to fasten the cover by means of screws in
combination with lugs, placed preferably on the back of the front plate, or with
projections on the cover fitting into the case. When I make the lock, so that 1 may
be able to withdraw the internal parts, without taking the said lock out of its place
in the door, I provide a plate which will cover up the front and act as a stop for
the bolt to prevent same from coming out, or 1 may simply insert a screwed stopper,
either to stop the motion of the camb or crank or other moving part of the lock at
a given point in its stroke. If applied to railway carriages, the inside handle may
be made having a covering for the nut which employed to fix the inside handle
to the shaft of the outside handle, or vice versa. The before mentioned bolt is made
to engage in the catch by means of a spring which is, under one modification, part
of the covering plate, said plate being of steel, or other suitable material.
Dated this 20th day of Nombor 1000

page_text: C
COMPLETE SPECIFICATION.
Improved Carriage Lock... :.
I, WILLIAM HAMILTON BLAKENEY, of Edengrove, Arbroath Road, Dundee, in the
County of Forfar, 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 :-
My invention relates to improvements in door locks and is specially applicable
to railway carriage doors, although not under any circumstances do I confine myself
to such.
The objects of my invention are to simplify the arrangement of the lock, and the
general construction of same, specially with the view of being able to take out the
internal working parts for the purposes of repair without the necessity of taking
the lock case out of the door.
The accompanying sheet of explanatory drawings illustrates the method of carrying
out my invention, according to one modification.
Figure 1. represents a side view, and
Figures 2. and 3. represent sections at A. A. and B. B. respectively.
Figure 4. represents a view looking on C. C.
Figure 5. a view of the face of the angled plate. and
Figure 6. a section at D. D. showing the outside and inside handles, the outside
handle being at present horizontal and the inside handle vertical.
In these drawings the same reference numerals are used to mark the same or like
parts wherever they are repeated.
Within a case 7. fitted into the frame of the door 8. is a bolt 9. which is made to
shoot out by means of a spring or springs 10. and its movements may be controlled
by outside and inside handles 11. and 12.. upon the shaft 13. of which, is a camb or
crank 14. The bolt as illustrated is made with a projection 15. on its side which
engages with a catch 16.-either part of the case or on the cover of the case, as
shewn it is made part of the case as the bolt 9. is made to slide back against the
resistance of the spring or springs 10. and thus keep it there until the door is in
what I will call the closed position, as opposed to wide open. In opening the door,
the bolt 9. being made to protrude some distance beyond the face of the lock, the
handles 11 and 12. have to be turned further than is actually necessary so that the
catch or projection 15. may have time and space to fall into its place 16. In closing,
the side of the bolt comes against a plate 17. on the fixed door post 18. and
immediately afterwards the bolt comes opposite its socket 19. and is pushed therein
by means of the before mentioned spring or springs 10. The camb or crank 14.
may be placed in such a position upon the shaft 13. as to give a varying backward
pressure to the bolt 9. making it difficult to commence to open the door by pushing
back the said bolt. As shewn in my drawings the crank is so placed as to obtain the
before mentioned result to a slight extent, but by making it to partially rotate upon
the shaft in the direction of the point of the bolt and fixing it there the effect can be
much increased. This camb or crank however may be placed in any convenient
position to operate said bolt.
:
When I make the lock so that I may be able to withdraw the internal parts
without taking the said lock out of its place in the door, I provide a plate which will
cover up the front and act as a stop for the bolt to prevent same from coming out,
or I may simply insert a stopper 20. to stop the motion of the camb or crank 14.
as shewn on my drawings. If applied to railway carriages, the inside handle 12.
may be made having a cover for the nut 21. which is employed to fix the inside
handle to the shaft of the outside handle 11. or vice versa.
The before mentioned bolt 9. may be made to engage in the catch 16. by means
of a spring which is, under one modification, part of the covering plate 22. said
plate being of steel, or other suitable material, or I may introduce at the side of the

page_text: bolt a spiral spring for the same purpose, or as is shewn in the drawing I may
make part of the bolt to act as a spring.
The modification which I have described and illustrated is for railway carriage
doors and is used in the the following manner :-
If the door is closed as is shewn in my drawings, then by turning back the
outside handle 11. the bolt 9. is drawn from its socket and the projection 15. on
the spring portion of the bolt falling into the hole or catch 16. keeps it from shooting
out again. The same movement may be performed with equal facility by turning
back the inside handle 12. When the door is closed the side 23. of the elastic
portion of the bolt coming against the plate 17. permits of the bolt being pushed
into its socket as previously explained
When I wish to take out the internal working parts, I unscrew the stopper 20.
and thus permit of the camb 14. being turned round until it comes out of its socket 24.
The bolt may then be pulled out from its case together with the springs. By
unscrewing the nut 21. the inside handle 12. may be taken off and its shaft 13. may
be withdrawn leaving the camb 14. to be taken out of the case through the hole 25.
thus leaving only the lock case in the door. 26. are holes for screws used to fasten
the lock case into position, and 27. are similar holes for screws used to fasten the
plate 17. to its post.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is
(1) In a door lock, the general construction, combination and arrangement of parts,
substantially as and for the purposes herein set forth, together with any mere
modification or modifications thereof.
(2) In a door lock, the construction of the bolt 9. as herein before described.
(3) In a door lock in which a shooting bolt is employed, the use of the stopper 20.
substantially as and for the purposes set forth.
(4) In a door lock, the use of the inside handle fixed to the shaft of the outside
handle as described.
Dated this 9th day of August 1890.
GEO. C. DOUGLAS & Co.,
Applicant's Agents.