Improvements in and relating to Car Brakes, and more particularly to that Class of Brakes known as Rail Brakes.
Year: 1897

page_text: Date of Application, 27th Apr., 1897-Accepted, 5th June, 1897
Improvements in and relating to Car Brakes, and more particularly
to that Class of Brakes known as Rail Brakes.
I, DAVID WILLIAMSON DAVIS, a citizen of the United States of America,
residing at No. 51 Wilcox Street, in the City of Detroit, County of Wayne
and State of Michigan, United States of America, Gentleman, 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:-
The object of the invention is to provide a brake of this character which will
be so connected and applied as to have the entire weight of the car as a fulcrum
weight.
With these ends in view my invention consists in the certain features of con-
struction and combination of parts as will be hereinafter fully described and pointed
out in the claims.
In the accompanying drawings Figure 1 is a side view of my invention and
Figure 2 is the top plan view of the same.
A, and B represent the respective front and rear axles of a car to which is
journaled the bifurcated brace and support C having suitable oil cups D connected
therewith. To the bifurcated ends of said brace C are secured the brackets E, in
which are pivoted the ends of the lever rods E', near the forward end of which are
pivoted the brake shoes F.
G represents coil springs secured to the lever bars E' and the support C, on
each side thereof for the purpose of holding the lever and brake shoes away from
the rails. H represents a flat cam bar connecting the lever rods E. A cam
lever I is journaled on a rod K in suitable collars L to prevent lateral movement
thereof, the said cam being so adjusted as to be in constant contact with the bar H,
the said rod K being fixed in the arms of the support C. To the upper end of the
cam lever I, is secured a rod or chain connected with the brake rod M. A. coil
spring N extending rearwardly is also secured to the lever I, to remove the cam
from the cam bar H. In operation it will be seen that when the cam lever E' is
brought forward it engages the cam bar H thereby forcing the brake shoes on
the rail.
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 car, the combination with the axles, the bifurcated brace or support
journaled thereon, and the brackets secured thereto, of the lever rods, pivoted to
said brackets, the depending brake shoes pivotally connected with said levers, the
transverse bar connecting the free ends of said lever rods, the cam lever bearing
upon said bar and means for normally holding the brake shoes away from the rails,
substantially as described.
2. In a car, the combination with the axles, the bifurcated brace or support
journaled thereon, and the brackets secured thereto, of the lever rods pivoted to
said brackets, the depending brake shoes pivotally connected with said lever rods,
the coiled springs secured to said lever rods and to the brace, the transverse bar

page_text: connecting the free ends of said lever rods, the rod secured to said brace, the cam
lever journaled thereon bearing upon said bar and the coiled spring secured to said
lever, substantially as described.
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1 1
1 1007
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.