A combination space dividing wall panel and elongated, fluorescent lighting fixture wherein the fluorescent lighting fixture is mounted a predetermined distance above the upper edge of the wall panel by a pair of lighting fixture support rods, each having a threaded stud at the bottom of such rod, which is threadingly inserted into the upper part of a metal post attached to and supporting an end of a space dividing wall panel. The support rods rotatably engage spaced, slotted apertures in the un...

An ambient pressure sensor generates an electrical signal which varies in response to changes in ambient pressure level. The sensor includes a sealed bellows or aneroid which varies in length as the ambient pressure varies. A fluid motor including a piston slidably mounted within the housing carries a tube which extends to a position adjacent one end of the aneroid. The end of the tube defines a valve seat which cooperates with a valve member carried on the end of the aneroid to control communic...

An automatic ambient light compensating circuit for use in conjunction with a light sensing device to render the light sensing device insensitive to variations in ambient light conditions and which is particularly adapted for use with reflective sensor systems. An optical sensor, including a source of light and a first photodetector, is disposed to detect the presence of an object in proximity thereto. The optical sensor provides an output signal which is a function of the amount of light receiv...

A circuit breaker comprises a current responsive tripping bimetal and a pair of compensating bimetals in latching engagement with each other to compensate for movement of the current responsive tripping bimetal in response to changes in ambient temperature. The circuit breaker is a multi-pole circuit breaker with a current responsive tripping bimetal in each pole and one pair of compensating bimetals in only one of the poles.

This invention relates to a finned assembly for a heat exchanger comprising an extended surface portion, an elongated tubular member, said extended surface portion comprising two identical parts, each having an internal cylindrical surface adapted to engage said tubular member and each having radially extending locking members adapted to engage locking members on the other of said parts. The invention further relates to methods and apparatus for attaching said extended surface portion to said me...

Disclosed is a method and apparatus for supplying a control signal in response to an abrupt change in ambient light level and for maintaining such control signal for a controlled time period irrespective of subsequent light level changes during such controlled time period, such apparatus including a photo-resistor coupled by an input transistor amplifier stage to the trigger input of a silicon controlled rectifier. The silicon controlled rectifier is coupled to an output transistor amplifier sta...

Signals from a desired source, such as a person speaking, are enhanced relative to unwanted ambient sound by a speech processor that includes an array of microphones arranged at equal distances from the desired source. The unwanted sound, being "off-center," arrives nonconcurrently at the individual microphones. The processor continuously arranges the instantaneous microphone outputs in order of their relative energy contained, and selects as its output some one of the microphone outputs that is...

An ambient particulate density measuring device has a chamber for collecting solid particle contaminants precipitated from an air flow pumped by an omnidirectional venturi located at the top of the chamber. The venturi is formed between a cover plate positioned above a curved external top of the chamber having a hole at its center that extends into the chamber. The chamber has a wind and rain shielded air inlet and has a glass bottom of two sections with an internal section exposed to the contam...

An automatically closing ambient air device is disclosed having a generally conical passageway, containing an inlet for the flow of fluid from the ambient environment into the passageway and an outlet for the flow of such fluid from the passageway, and having valve means arranged to close fluid flow through the outlet from the passageway which is actuated by buoyant force and/or gravitational force and/or a combination thereof imposed by a weighted element in response to the spacial orientation ...

An ambient stable tea based beverage that contains a tea extract and a preservative system. The preservative system contains cinnamic acid, one or more essential oils and one or more pasteurization adjuncts that become fungicidal when activated by heat.