An Improved Link Movement for Locomotives.
Year: 1892

page_text: Date of Application, 18th July, 1892-Accepted, 3rd Sept., 1892
COMPLETE SPECIFICATION.
An Improved Link Movement for Locomotives.
I, SAMUEL LEE BRANTON, Engine Erector, of Omaha, in the County of
Douglas and State of Nebraska, United States of America, do hereby declare the
nature of my invention for AN IMPROVED LINK MOVEMENT FOR LOCOMO-
TIVES, 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 this invention is, to provide a simple link movement for locomotives,
by means of which the mechanical irregularities in the operation of the valves, may
be overcome.
In the accompanying drawings,
Fig. 1 shows a broken section of a locomotive boiler, having my link movement
attached,
Fig. 2 is a view showing part of the elements as detached, while
Fig. 3, illustrates an end view of Fig. 1.
In locomotives as usually constructed, the link has been given support, by being
hung to the curved arms of the reversing shaft, in operating which the link was
carried in an arc, and thus caused a mechanical irregularity in the operation of the
cylinder valves, entailing a loss of steam power due to the fact, that the port
openings did not cut off equally.
To overcome this defect, I impart a rectilinear movement to the link, so as to
equalize the movement.
In my invention, A represents the broken section of an ordinary locomotive
boiler, provided with my improvement, which comprises essentially the guide-yoke B,
the duplex trunnion block C, the hangers D, D, and the lift E.
The guide-yoke B of steel, is preferably square, and provided with a supporting
Hange, and a rectangular guide opening, within which the duplex trunnion block C
is adapted to reciprocate.
The trunnion block C, is provided with two stub shafts C', C, the upper giving
support to the hangers D, D, and the lower to the bifurcated lift E, which is con-
nected to the lift levers F, F
The hangers D, D, give support at their lower ends, to the links H, H, as shown
in Figs. 1 and 2, the links being connected to the eccentric rods I as usual.
The lift levers are mounted upon the reversing shaft K, which supported by
means of the bracket K. The lift lever F' is in rod connection with the operating
lever L, in operating which the lift E, is made to carry the trunnion block up or
down, and thus raise or lower the connected links H, H, which are not carried out
of position but mechanically find their true adjustment, and thus provide equal port
openings at all points.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare what I
claim is:
1st. In a link movement, the combination of a vertical guide-yoke, a reciprocating
duplex trunnion block working within said yoke, provided with two superposed
stub shafts, hangers attached to the upper shaft, and a bifurcated lift to the lower
shaft, slide links supported by said hangers, and an operating lever attached to said
lift, so that said links may be given a rectilinear adjustment, substantially as and
for the purpose set forth.
2nd. In a link motion, the combination of the following instrumentalities, to wit:
The voke B trunnion block Changers D. Do lift I lavare
vanced
A

page_text: operate the slide links H, H, in combination with the operating lever L, so as to
impart a rectilinear movement to said sliding links, substantially as and for the
purpose set forth.
Dated this 5th day of A 1905
ALLISON BROS.,
Agents for the Applicant.