Year: 1899

page_text: Date of Application, 11th Sept., 1899
Complete Specification Left, 11th July, 1900-Accepted, 1st Sept., 1900
Big T
I, JOHN ROTHERHAM, of 27, Spon Street, Coventry, Manufacturer, do hereby
declare the nature of this invention to be as follows:-
-
This invention has reference to improvements in and relating to lubricators
and the object of my invention is to obviate certain defects in that class of
lubricators in which a grease cap is screwed down for the purpose of supplying
or forcing lubricant into the bearing.
It is well known that in employing the class of lubricators referred to on
motors cars or other machines or machinery subject to considerable vibration
the grease cap is liable to be moved or rotated by the vibration and my invention
consists in the means substantially as hereinafter described to obviate the defect
referred to.
In carrying my invention into practice I provide my improved lubricator
with a spring which is adapted to normally enter one or more of a suitable
series of notches with which I provide the grease cap so that said cap is pre-
vented from rotating even if severely vibrated but said cap can be readily turned
by the hand the said spring acting as a spring pawl.
The cap may be formed or provided at any suitable part with the notches
referred to and in order that a lubricator of the class referred to may be filled
without removing the cap or other part of the lubricator I form the lubricator
spindle with a taper neck so that when the cap has been sufficiently screwed
down the grease or other lubricant can be inserted at that part.
I, JOHN ROTHERHAM, of 27, Spon Street, Coventry, Manufacturer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
This invention has reference to improvements in and relating to lubricators
and the object of my invention is to obviate certain defects in that class of
lubricators in which a grease cap is screwed down for the purpose of supplying
a forcing lubricant into the bearing.
It is well known that in employing the class of lubricators referred to on motor

page_text: cats or other machines or machinery subject to considerable vibration, the grease
an is liable to be moved or rotated by the vibration and my invention consists
in the means substantially as hereinafter described to obviate the defect referred
tv.
In carrying my invention into practice I provide my improved lubricator
with a spring which is adapted to normally enter one or more of a suitable
series of notches with which I provide the grease cap so that the said cap is
prevented from rotating even if severely vibrated but said cap can be readily
turned by the hand the said spring acting as a spring pawl.
The cap may be formed or provided at any suitable part with the notches
referred to and in order that a lubricator of the class referred to may be filled
without removing the cap or other part of the lubricator, I form the lubricator
spindle with a taper neck so that when the cap has been sufficiently screwed
down the grease or other lubricant can be inserted at that part.
In order that my invention may be rightly understood reference is made to
the accompanying drawings.
Fig. 1 is a lubricator in which a is the grease cap, the bolt or body, the
bottom end of which is threaded to fix it to the machine, and in the hexagon
head is fixed a disc in which is cut six keyways as shown in Fig. 1, f and in
centre of Fig. 7. Under the head of bolt is fixed a disc as shown by the outer
edge of which is threaded to screw into cap; a centre pin with two ribs or keys,
as shown by e Fig. 1, also by Fig. 8, is fitted in cap. At the top end of same is
fixed a disco Fig. 1, also shown by Figs. 2 & 3; on the under side of disc four V
grooves are cut, a recess is turned in head of cap d Fig. 1, also shown in Fig. 4
and at opposite sides of this recess are made two smaller recesses; a circular
spring, as shown in Figs. 5 & 6, fits into this recess, the two projection on the
spring fitting into the two smaller recesses, the two raised projections on the
face of the spring fit into the V grooves in disc on centre pin, when the cap is
screwed down to force out the grease. The centre pin is held from turning round
by the ribs fitting into the keyways in disc which is fitted into head of bolt,
the spring is carried round by the side projections as the cap is turned round
the projections on the face of the spring lock into the grooves, in the disc on
the centre pin, with sufficient force to prevent it from moving by vibration, but
allowing cap to be readily turned by the hand to expel the grease.
Fig. 9 shows another method of using this locking arrangement. In this
there is a centre pin h fixed into the head of the grease cap, a, and threaded to
screw into the hollow threaded bolt a dise j fits under the head of the bolt, in
the edge of the disc, a key is fitted which fits in a keyway in the cap as shown
in Figs. 11 & 12, a four grooved washer is fixed by a screw m under this disc,
a recess is turned in the disc under the bolt head as shown by Fig. 9, n in which
is the locking spring. When the cap is turned round to expel the grease, the
key way in the cap carries round the disc by the key and so moves the spring as
in Fig. 1.
Fig. 10 is a lubricator so arranged that no part is taken off the machine to
fill it the cap screws up the centre stem e to expel the grease, the locking
spring fits into the recess Fig. 10. In order to fill this cap it is unscrewed to
the bottom of the centre stem or pin e where the taper neck allows the cap to
fall over to one side, then the lubricator can be charged without any part being
removed; the grooved disc is carried round by a key as in Fig. 9.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. In lubricators the spring and the grooved disc for the purposes substantially
as described and shown in the drawings.
2. In lubricators the ribbed centre and keyway disc for the purposes sub-
Etantially as described and shown in the drawings."

page_text: 3. In lubricators the taper neck to enable the grease cap to be filled, for the
purposes substantially as described and shown in the drawings.
4. The arrangement and combination of parts in lubricators, all for the pur-
poses substantially as described and shown in the drawings.
Dated this 11th day of July 1900
HORN, SON & Co.,
151, Strand, London, Applicant's Agents.