Improvements in Buffers for Railway and Tramway Vehicles.
Year: 1889

page_text: Date of Application, 15th Feb., 1889
Complete Specification Left, 15th Nov., 1889-Accepted, 21st Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Buffers for Railway and Tramway Vehicles.
I, THOMAS FEWSDALE CRAVEN, of 27 Westbourne Road, Sheffield, in the County
of York, Engineer, do hereby declare the nature of this invention to be as
follows:-
:-
This Invention relates to improvements in buffers for railway and tramway vehicles
and it consists in an improved means of securing the buffer spindles in their cases or
cylinders. I form upon each spindle a solid collar which provides a recess for the
reception of a flanged washer, preferably in two parts; over this washer I pass a
flanged disc or cylinder which is retained in position with its flanges overlapping
those of the washer by the pressure of the buffing spring; or the flanges of the washer
and of the covering disc may be screw threaded and thus connected.
This construction will simplify the fitting, and further, will prevent the spindles
being withdrawn in the case of the vehicles becoming buffer locked.
Dated this Fifteenth day of February 1889.
For the Applicant,
W. E. GEDGE,
Agent.
COMPLETE SPECIFICATION.
Improvements in Buffers for Railway and Tramway Vehicles.
I THOMAS FEWSDALE CRAVEN, of 27 Westbourne Road, Sheffield in the County
of York, 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 buffers for Railway and Tramway vehicles
and it consists in improved means of securing the buffer spindles or plungers in their
cases or cylinders whereby I transmit the effect of the recoil to the spring in such
a manner as to relieve the spindle from tensile strain and prevent its being withdrawn
in the case of the vehicles becoming buffer locked, while greatly facilitating the fitting
of parts of the buffer and their removal when required.
Upon the accompanying Sheet of Drawing
:-
Figure 1 is a sectional plan of a buffer embodying my Invention ;
Figure 2 being an end view of same ;
Figures 3 and 4 detached parts of same, and
Figure 5 a modification thereof;
Similar letters of reference indicating similar parts in each of the figures
respectively.
It will be seen that I form upon the spindle A of the buffer a solid collar B, which
provides a recess for the reception of a flanged washer C, preferably in two parts c, C¹
(Figure 4); over this washer I pass a flanged disc or cylinder D (shown detached
Figure 3), which is retained in position, with its flange d, d overlapping those of the
washer C, by the pressure of the buffer spring E.
On the recoil of the spring after the buffer has been driven in, the flange d, d
of the disc D strikes against the shoulder f, on the inside of the casing or
cylinder F, and transmits the shock direct to the spring E, the spindle A being
thus relieved from any tensile strain.
The flange d of the disc D being deeper than, or projecting above, the washer C

page_text: lying within it, this latter cannot come into contact with the shoulder f, and jar
upon the collar B of the spindie A until the recoil has been taken by the disc D
and thereby transmitted to the spring E; this disc D being in effect practically a
continuation of the spring E to 'meet the shoulder/.
In fitting any arrangement, the washer C is introduced into the recess formed by
the collar B, the flanged disc D is then passed over the spindle A until it meets this
collar, the spring E is then placed and the whole secured in position by bolting the
plate G to the casing or cylinder F. Thus it will be evident that both the fitting and
the renewal of a part of this arrangement can be readily effected without the aid of a
skilled mechanic or the necessity of taking the buffer to the forge as when parts are
shrunk or driven on to each other.
-
I now give preference to the arrangement shown Figure 1, in which the washer C
and disc D are separate parts, but I may connect them by. their flanges as
shown Figure 5, in which case in order to secure the same effect for recoil 1.
nake the recess formed in the spindle A by the collar B correspondingly wider.
than at Figure 1.
.
I may use any suitable buffer spring in lieu of the volute spring shown on the
Drawing.
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 I
claim is :-
1. In a buffer för Railway and Tramway vehicles, the combination with a flanged
washer set in a recess formed by a solid collar on the plunger, of a flanged disc sur-
rounding and deeper than the said washer and retained in position by the buffer
spring so that upon the recoil of the spring the flange of the disc being the first part
to strike against the shoulder upon the inside of the casing of the buffer receives the
shock of the recoil and transmits it to the said spring the whole arranged and working
substantially as described.
2. The modification hereinbefore described and illustrated Figure 5 of the
Drawing.
I
3. A buffer for Railway and Tramway vehicles constructed, combined and arranged
to operate substantially as hereinbefore described and illustrated on the accompanying
sheet of Drawing.
Dated this Fourteenth day of November 1889.