A freeze indicator comprising a frangible ampule containing a liquid which expands upon freezing, a dye soluble in the liquid and a nucleating agent, the nucleating agent and the liquid having substantially similar space groupings, the ampule being enclosed within a blister of transparent film, the blister being adhered to a backing, the inner surface of the blister being coating with an absorbent layer comprising a binder wettable by the liquid and a filler, whereby upon rupture of the ampule t...

A method and product whereby color changing indicator salts such as cobaltous salts, preferably CoCl.sub.2 or CoBr.sub.2, are firmly adhered to sand, other particulate silicas or other carriers so that unwanted fines, material loss and solvent washing characteristic of prior indicator salt-coated carriers are eliminated. The process is carried out by thoroughly dehydrating a quantity of cobaltous salts and dissolving and storing the dehydrated cobaltous salt in absolute alcohol, preferably absol...

A bite indicator for indicating a bite by a fish on a line of a fishing rod includes an arm that is free to swing upward or downward and a line engagement device secured to the arm for engaging the line. A change in the tension on the line causes the line engagement device to rise or fall as the arm swings upward or downward. The line engagement device includes a body provided with a channel and a pivoting gate that pivots between closed and open positions. In the closed position the gate extend...

An airflow (1) having at least one air inlet (8) connectable to a pressurized air supply source; a plurality of air outlets (16) each connectable to a respective air tube; and a viewable chamber (28) pneumatically connected between the or each air inlet and each air outlet, each such viewable chamber (28) containing an indicating element (18) floatable within the chamber in response to flow of air from the air inlet to the air outlet to thereby visually indicate the flow of air through each resp...

A torque indicator system for use while rotating a screw pile into the ground with a positive displacement hydraulic motor, includes first and second hydraulic cylinders having their rods connected together in a manner such that net pressure forces are created in response to the high inlet and low outlet pressures of the motor. A pressure gauge mounted on one of the cylinder assemblies reads the working pressure drop across the motor, which is directly related to its output torque.

A system for indicating the use of a fall arresting device to arrest a fall wherein a collapsible member is mounted on one of the load supporting members so that the collapsible member will collapse when a predetermined load has been applied thereto but will remain substantially in place to indicate that the predetermined load had been applied thereto.

A directional indicator made to fasten around the wrist for guiding the user in a predetermined direction, including a magnetized needle attached rotating dial balanced on a pointed pin inside a casing, a needle pointer fastened to a center shaft on the rotating dial, a convex lens covered on the casing over the rotating dial and marked with a fluorescent mark, whereby the needle pointer is maintained in alignment with the fluorescent mark to guide the user toward the predetermined direction.

An oxygen indicator comprising (a) at least one aliphatic organic compound having 3 or more carbon atoms and containing at least one primary amine group and at least one hydroxy group and optionally an organic or inorganic acid or the chemically bonded material of the organic compound and the acid, and (b) at least one dyestuff selected from the group consisting of thiazine dyestuffs, indigo dyestuffs and mixtures thereof is disclosed. The oxygen indicator of this invention can be used under anh...

An indicator for a gauge, such as a floor scale. The indicator includes a semi-circular dial and a two-pronged needle indicator that is free to rotate 360.degree. within the gauge with only one of the two prongs being used at a time.

A universal indicator cap for a dishwasher rinse agent dispenser including a reservoir with an opening positioned in door of a dishwasher for indicating a low level of rinse agent in the reservoir, the door being pivotal between an opened horizontal position and a vertical closed position. The indicator cap comprises a body including a head portion having a cavity formed therein and a neck portion, a gasket adaptor positioned about the neck portion such that the indicator cap is adaptable to dif...