Improvements in Eccentrics.
Year: 1896

page_text: Date of Application, 6th Feb., 1896-Accepted, 14th Mar., 1896
COMPLETE SPECIFICATION.
Improvements in Eccentrics.
I, WILLIAM NIMAN REAZOR, of Freeland, in the County of Luzerne, and
State of Pennsylvania, United States of America, Gentleman, do hereby
declare the nature of this invention and in what manner the same is to he
performed, to be particularly described and ascertained in and by the following
statement :--
The invention relates to improvements in eccentrics. The object of the present
invention is to improve the construction of the connection between the eccentric-
rod and the eccentric strap or yoke, and to provide simple, inexpensive and
efficient means for enabling the eccentric-rod to be accurately and rapidly adjusted
without necessitating its removal from a locomotive or engine.
The invention consists in the construction and novel combination and arrange-
ment of parts hereinafter fully described, illustrated in the accompanying drawings
and pointed out in the claims hereto appended.
In the drawings:-
Figure 1 is a plan view of a portion of an eccentric-rod and an eccentric strap or
yoke constructed in accordance with this invention.
Figure 2 is a reverse plan view.
Figure 3 is a longitudinal sectional view.
Figure 4 is a transverse sectional view.
Like numerals of reference indicate corresponding parts in all the figures of the
drawings.
1 designates an eccentric strap or yoke, having an arm or extension 2 and
provided therein with a rectangular recess 3, receiving the adjacent end of an
eccentric-rod 4, which is capable of adjustment longitudinally of the recess 3 to
lengthen or shorten it as desired. The eccentric yoke or strap is provided at one
side of the recess 3 at the outer end of the arm or extension 2, with a Jug 5,
having a threaded opening 6, receiving a longitudinally-disposed adjusting screw 7
which, intermediate of its ends, engages a lug 8 of the eccentric-rod 4. The lug 8
is provided with a threaded opening 9 arranged in aligument with that of the
lug 5, and these lugs 5 and 8 may be formed integral with the strap and the
eccentric-rod or may be constructed separate and suitably secured to those parts,
as desired.
The adjusting screw 7 has a squared or polygonal outer end to adapt it to
receive a wrench, and is provided adjacent to its outer end with threads 10 and it
has a reduced intermediate threaded portion 11 which engages the threaded
opening of the lug 8 and the inner end 12 of the screw has a further reduction and
is threaded and engages a threaded socket or opening 14 of the strap at the inner
end of the recess 3. The threaded end portions 10 and 12 have the same number
of threads to the inch so that the adjusting screw is capable of longitudinal
movement in the threaded openings of the strap or yoke, and the threads of the
intermediate or central portion of the screw are different from the end portions.and
as the adjusting screw is rotated the eccentric-rod is drawn inward or outward
according to the direction in which the screw is turned. These threads may be of
any desired pitch and number to the inch and it will be apparent that they enable
a very fine and accurate adjustment of the eccentric-rod to be obtained, and the
screw obviates the necessity of entirely removing the eccentric-rod from a loco-
motive or engine and conveying the same to the shop and increasing or diminishing
the length by the application of heat and the like. At the bottoin of the recess 3

page_text: adjacent to the longitudinal screw is provided a channel 15, and the lower or inner
face of the lug 8 is rabbeted or recessed at 16 to enable it to fit in the channel and
to conform to the configuration of the recess. When the lug 5 is constructed
separate from the arm of the strap, its lower or inner face will be correspondingly
rabbeted or recessed.
A jam-nut 17 is arranged on the threaded outer portion of the adjusting-screw
and is adapted to be screwed up tight against the lug 5 after the adjusting screw
has been set, and bolts 18 and 19 pass through the connecting-rod and the arm of
the strap or yoke and are tightened after the parts are properly adjusted.
In order to accommodate the screws or bolts 18 and 19 to the adjustment of the
eccentric-rod, the latter is provided adjacent to the bolt 18 with a longitudinal
slot 20 and the stra,, is provided adjacent to the other bolt 19 with a corresponding
slot 21.
The outer end of the adjusting-screw is provided with a perforation 22, and
the eccentric-rod is provided with a perforation 23 arranged adjacent to the
perforation 22, and these perforations are adapted to receive the wire of a master
mechanic's seal, after the parts have been properly adjusted, to serve as a guard to
prevent an engineer or other person from changing the position of the adjusting-
screw.
It will be seen that the eccentric-rod may be readily adjusted longitudinally to
control the action of the valves of an engine and to position the same properly, and
that the connection obviates the necessity of removing the eccentric-rod from an
engine to lengthen or shorten it. It will also be apparent that the connection is
strong and durable, and that the parts are rigidly held in their adjustment.
Changes in the form, proportion and minor details of construction may be
resorted to without departing from the principle or sacrificing any advantages of
the invention.
:
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 device of the class described, the combination of an eccentric strap or
yoke provided with an arm or extension, an eccentric rod arranged to slide thereon
to lengthen or shorten it, and a longitudinal adjusting-screw mounted on the arm
or extension of the yoke or strap, and connected with the eccentric rod and
adapted to slide the same on the arm or extension and to secure the rod in its
adjustment, substantially as described.
2. In a device of the class described, the combination of a strap or yoke
provided with an extension and having threaded openings at the inner and outer
ends of the extension, a longitudinal adjusting-screw arranged in the said threaded
openings, and an eccentric rod arranged on the extension of the strap or yoke and
having a threaded opening receiving the adjusting-screw between the ends of the
same said eccentric-red being capable of sliding on the extension when the screw
is rotated, substantially as described.
3. In a device of the class described, the combination of a strap or yoke having
an extension and provided therein with a recess and having a threaded opening or
socket at the inner end thereof, a lug arranged at the outer end of the recess and
having a threaded recess, and an eccentric-rod arranged in said recess and adapted
to slide on the extension and provided with a lug having a threaded perforation
receiving the central portion of a screw, substantially as described.
4. In a device of the class described, the combination of a strap or yoke having
an extension and provided therein with.a recess and having a threaded opening or
socket at the inner end thereof, a lug arranged at the outer end of the extension,
an adjusting screw having an outer threaded portion 10 to screw into the said lug
and provided with a central reduced threaded portion 11, and having a second
reduction at its inner end and threaded thereát and screwing into the opening or
Eocket, an eccentric-rod arranged in the recess of the extension and provided with

page_text: a lug having a threaded perforation or opening receiving the central threaded
portion of the screw, a jam-nut arranged on the outer threaded portion of the
screw and bolts passing through the eccentric rod and the extension, substantially
as described.
Dated this 6th day of February 1896
BOULT & WADE,
Agents for the Applicant..