Activating mechanism for flashlamp article

Activation indicator for a fire detector

Air cleaner with restriction indicator

Apparatus for checking the level of liquid in containers

Apparatus for monitoring the condition of a filter

Apparatus for visually indicating when a pool filter is dirty

Assembly for indicating translational movement of a member selec

Automatic product depletion indicator

Bearing wear detecting device for canned motor driven pumps

Blockage indicator for internal combustion engine air cleaner el

Book marker employing endless elastic band

Bookmarker

Coiled edge guide for rod-tube signal device and method

Command bar system

Condition change indicator

Device for detecting rotational speed of a tape reel

Device for showing receipt of predetermined shock

Device for showing receipt of predetermined shock

Differential pressure indicating device

Differential pressure indicator