Improvements in Lubricators.
Year: 1894

page_text: Improvements in Lubricators.
FRANK TRIER Civil Engineer of 19 Great George Street Westminster London.
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 improvements relate to lubricators of the Stauffer or screw-pressure type for
use with semi solid lubricants & consist
1. In constructing the cap A of a Stauffer lubricator (Fig. 1) with a raised
cylinder C of smaller diameter, in which a piston B is actuated by a comparatively
weak spiral spring. The piston rod D passes thro' the top of the cylinder & shows
the position of the piston. By screwing down the lubricator cap, the lubricant is
forced to the bearing & at the same time it lifts the piston B compressing the
spring. As the lubricant is used, the piston gradually sinks down & replenishes
the waste. Owing to the capacity of the cylinder being considerably less than
that of the cap even a small consumption of lubricant shows itself in the position of
the piston rod. When the piston has spent itself a slight turn of the cap suffices.
to drive it out again & renew the automatic action. By means of the screw S in.
the shank of the lubricator the outflow of the lubricant can be regulated.
My improvements consist further
2. In preventing the cap of a Stauffer lubricator from unscrewing thro' vibrations..
For this purpose I attach a spiral colapsable spring either to the shank as shown
in the accompanying drawing Fig. 2.-or to the inside of the top of the cap. The
spring forces the cap & shank asunder & by preventing play in the threads.
unscrewing thro' vibration is prevented. Instead of relying solely on the increased
friction in the thread I often provide the spring with a catch or pawl which engages.
with notches in the cap or when the spring is attached to the cap the notches are
formed in the shank. The catch may be a knob at the end of the spring or its.
equivalent, but I prefer to make the catch or pawl so that it becomes reversed &
is thrown out of action by the action of unscrewing the cap for the purpose of
refilling. A small disc threaded to the end of the spring as shown in Fig. 3 fulfills.
this condition. When unscrewing the cap it assumes the dotted position & is then
out of action. The pawl or end of the spring serve also, by the click which the
operator feels or hears when passing over the notches, to indicate the amount the
cap has been turned. The method shown of fixing the spring to the shank or
the cap) is to turn a recess with undercut edges into which the ringshaped case of
the spring of somewhat larger diameter than that of the recess is sprung (Fig. 2 &
Fig. 24) or a projection with undercut edge is used as in Fig. 3. To prevent the
spring from turning or coming out I bend the end & allow it to enter a bole.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to be performed, I declare that what I
claim is.
1. A Stauffer lubricator in which the cap has a raised cylinder of smaller
diameter & fitted with a spring piston, with provision for regulating the outflow
substantially as described with reference to Fig. 1. of the accompanying
drawings.
2. The employment of a spring in the interior of a Stauffer lubricator or in
lubricators similarly constructed for the purpose of preventing the play &
increasing the friction in the threads of the two parts substantially as described
with reference to Fig. 2. of the drawings.

page_text: 3. The employment in the interior of a Stauffer or similar lubricator of a spring
with a ratchet & pawl arrangement-the pawl being reversible-substantially as
described with reference to Fig. 3. of the drawings.
Dated this 18th day of April 1894.