Improvement in Railway Passenger Car Trucks.
Year: 1890

page_text: Complete Specication Lert, 18th rep., 1890-Accepted, at Apr., 1990
COMPLETE SPECIFICATION.
Improvement in Railway Passenger Car Trucks.
I, WALDO HALL MARSHALL, of 818 Rookery Building, Chicago, Illinois, United
States of America, Mechanical 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 railway passenger car trucks and consists in the several
combinations of parts hereinafter described and claimed.
In the accompanying drawings forming part of this specification
Fig. 1 is a plan view of a buffer and draw-bar.
Fig. 2 is a side elevation of the same.
Fig. 3 is a side elevation of a side bearing embodying my invention.
Fig. 4 is a cross section.
Fig. 5 a plan view, and
Fig. 6 a horizontal section of said side bearing, the latter section taken through
line C, D, of Fig. 3.
Fig. 7 is a side elevation of side bearing when buffer has been compressed.
My invention is intended to be applied to intermediate trucks and cars similar in
kind to those described in British Patent No. 16503 filed Oct. 19, 1889.
Referring to the accompanying drawings, 6 indicates the draw-bar suspended from
the truck as shown in the patent before referred to. The draw head 8 is secured to
the car sills 9 and 10 and is vertically grooved as shown. In said groove the
auxiliary draw head 7 slides, the latter being connected to the draw-bar by coupling
pin 1. The draw-bar is made in two parts one sliding over the other, and is provided
with spring 15 to relieve sudden strains either of compression or tension. The said
spring is arranged between two plates 2 and 3, the latter (3) resting against
projection 26 of draw-bar, and the former (2) against the end of bolt or rod 25 secured
thereto. In case of a strain of compression, plate 2 is caused to compress the spring,
while in case of a strain of tension, plate 3 moves away from its seat 26 acting also to
compress the said spring. The said draw-bar is provided with two joints 27 and 28
for the
purpose of allowing the necessary motion to rear end of draw-bar as the truck
swivels in passing curves.
Referring now to Fig. 3, the side bearing 4 is secured to side sill 16 of car, the said
side bearing 4 co-operating with truck side bearing 5. The latter is provided with
flanges 22 to prevent lateral displacement or disengagement. When by any means
the car is raised so as to relieve the truck of its weight the two can be longitudinally
disengaged from each other, and for this purpose the under side of bearing 4 is inclined
as shown.
As the adjacent ends of two cars are supported on the same truck, and as the
distance between the adjacent ends varies as the tension or compression of the draw-
bar is greater or less, it is necessary to make the connection between car and truck
such as to allow for such motion. Referring to the drawing (Fig. 6) it will be seen
that the end of the truck equalizer or car support 11 is T-shaped and is fitted to side
bearing 5 so that a vertical and longitudinal motion can take place. The weight of
the car is transmitted from side bearing 5 to plate 21, thence to springs 17, side

page_text: bearing equalizer 18 and link 19. The upper end of this link rests upon truck
equalizer 11 and transfers the weight to it. When adjacent cars approach or recede
from each other on account of varying tension or compression of draw-bar springs,
link 19 will swing and the parts referred to will assume the position illustrated
in Fig. 7.
ه ندرا
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner, the same is to be performed, 1 declare that what I
claim is :-
1. The combination of truck side bearing and truck equalizers with a longitudinally
yielding connection between the same, whereby said side bearing is permitted to move
longitudinally relatively to said truck equalizer, to compensate for compression of
draw spring, substantially as described.
2. The combination with car provided with side bearings, of truck side bearing and
truck equalizer and a longitudinally yielding connection between said truck bearing
and equalizer, whereby said bearing is permitted to move longitudinally relatively to
said truck equalizer, to compensate for compression of draw springs, substantially as
described.
3. The combination with car provided with side bearings, of truck side bearing
having side flanges, truck equalizer and a longitudinally yielding connection between
said truck bearing and equalizer, whereby said bearing is permitted to move
longitudinally relatively to said truck equalizer and. lateral displacement prevented,
substantially as described.
4. The combination of truck side bearing; with spring, side bearing equalizer, link
and truck equalizer, substantially as described.
5. The combination of truck side bearing with springs, plate side bearing equalizer,
link and truck equalizer, substantially as described.
Dated this 18th day of Febr 1800.