Robert Z Moore
Plumbers at Grant St, Englewood, CO

3958663, May 25, 1976

Jan 15, 1975

5/541200

Robert M. Moore - Englewood CO

F16N 730

184 64

Disclosed herein is an air line lubricator safety device for automatically actuating an air actuatable member located outside of the lubricator. The air actuatable member may be a normally open air valve in an air line leading to an air operated tool, said air valve being automatically closed when the oil level in the lubricator falls below a predetermined level and thereby prevents operation of the tool; or the air actuatable member may be a signal device such as a whistle or light or other signal automatically air actuated when the oil level in the lubricator falls below a predetermined level. The safety device comprises a lubricator having an oil bowl containing oil and air under pressure, the bowl having a head provided with a piston chamber, a float-controlled piston slidable in the chamber, an air intake passage in the head communicating with the pressurized area region of the bowl and with the piston chamber, and an air oulet tube leading from the piston chamber; said piston moving downwardly in the chamber when the oil supply falls below a predetermined level, thereby permitting pressurized air to flow through the air outlet tube for actuating one of the air actuatable members located outside of the lubricator.

3941077, Mar 2, 1976

Feb 25, 1974

5/445210

Robert M. Moore - Englewood CO

G01L 912

116 70

Disclosed herein is a signal device for detecting the condition of a fluid line filter and automatically activating a signal indicating that the filter requires cleaning or replacement. The signal device may be built in or installed as an attachment in the fluid lines leading to and from a filter for removing moisture and/or contaminants from the line. The signal device comprises a piston housing containing a piston movable to signalling position in response to reduced fluid pressure adjacent one end of the piston resulting from reduced volume of fluid passing through the filter, locking means for retaining the piston in said signalling position, and signal actuating means activated by fluid pressure when the piston is in said signalling position. The signal may be visual or audible, actuated mechanically or electrically.