Improvements in Mechanical Oilers and Journal Boxes for Shafting
Year: 1885

page_text: Ì, HENRY PENNELL HUMPHREY, of 37 Nineteenth Street, of Lowell, in the
County of Middlesex and Commonwealth of Massachusetts, one of the United
States of America, Machinist, 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 cams and consists in means substantially as herein
described and claimed, whereby such cams may be readily attached to and detached
from a shaft.
In the accompanying drawings, figure 1 is an isometric view of a shaft, a journal.
box provided with an oil reservoir, a lever pivoted by a horizontal stud on the
side of said reservoir and a cam sprung upon the shaft; figure 2, an end view of
a shaft with such a cam secured thereto; figure 3; a side elevation of the cain
detached and contracted, the dotted lines indicating the circumference of a shaft,
figure 4, an isometric view of the cam detached.
The cam hereinafter described may be attached to any cylindrical shaft and may
be used in a variety of machines, but is shown in figure 1, in combination with
certain parts of a mechanical oiler and journal box, substantially such as is
described in Letters Patent No. 5244 A.D. 1885 for Improvements in Mechanical
Oilers and Journal Boxes for Shafting, granted to me and dated April 28, 1885.
In said figure 1, A is a horizontal shaft; B is the journal box proper and B' is
its cover; G is an oil reservoir formed in one piece with, the box B; P, the lever
by which the pump (not shown) is operated, said lever. P. being pivoted on a
horizontal stud g², secured to a projection g on the back of said reservoir G, all
substantially as described in the above named patent. The cam W operates the
lever P just as described in said previous patent, but instead of being secured to
the shaft A, by wires which surround the cam and the shaft and have their
ends twisted together, is held on the shaft by its own elasticity. The cam W
is long enough to reach more than half way around the shaft, and is scarfed
down to an edge at. each end and being made of steel is shaped to have an
internal curvature of smaller radius than the shaft to which it is to be secured and
is then given a spring temper. The cam is applied to the shaft by forcing the
opening between the ends of the cam against the side of the shaft until the ends
spring apart far enough to admit the shaft. By crowding the cam still further on

page_text: the shaft its inner ends spring towards each other and the inner surface of the
cam is thereby drawn in close contact with the outer surface of the shaft, and by
its own elasticity the cam is held securely on the shaft without other fastening.
The cam may be formed of any metal or material to which a spring temper can
be given by fire or by rolling.
The cam may be readily drawn from the shaft if desired, by springing open
its ends.
The cam above described may be used wherever perfect immovability of the cam
upon its shaft is not absolutely required.
E
Having now described the nature of my said invention I declare that I claim
A cam formed of elastic material, and having a curved inner surface, the
curvature of which is of a less radius than that of the outer surface of the shaft
to which said cam is to be secured, and which inner surface of said cam is
longer than half the circumference of said shaft, whereby said cam may be sprung
upon said shaft and retained thereon by its own elasticity, substantially as
specified.
HENRY PENNELL HUMPHREY.
Dated this tenth day of October A.D. 1885.
Witnesses,
ALBERT MONROE MOORE.
GERTRUDE MERILLA DAY.