Abstract: The present invention relates to apparatus and a method for measuring ammonia in biochemical processes, and more particularly to apparatus for real time measuring the amount of ammonia in a liquid with or without suspended solids.

Abstract: A gas water heater including a water container adapted to be heated by a gas burner; and an enclosure surrounding the burner, the enclosure having at least one entryway adapted to allow air and fumes to enter the enclosure without igniting flammable gases or vapors outside of the enclosure.

Abstract: A water heater includes a water container, a combustion chamber adjacent said water container having at least one inlet to admit air and extraneous fume species into the combustion chamber, at least one inlet comprising a metal plate having a thickness of about 0.4 to 0.6 millimeters and through which pass a plurality of ports, each port having a quenching distance not greater than about 0.6 mm, and being capable of confining ignition and combustion of the extraneous fume species within the combustion chamber; and a burner associated with the combustion chamber and arranged to combust fuel to heat water in the container.

Abstract: A gas water heater including a water container adapted to be heated by a gas burner; and an enclosure surrounding the burner, the enclosure having at least one heat sensitive entryway adapted to allow air and fumes to enter the enclosure without igniting flammable gases or vapors outside of the enclosure.

Abstract: A water heater including a water container; a combustion chamber located adjacent the container, the combustion chamber having a floor portion with an opening; a conduit extending upwardly from and being substantially sealed to the opening; a burner located inside the combustion chamber; and a flame trap positioned across the conduit, the flame trap permitting ingress of air and/or extraneous gases into the combustion chamber and prevent egress of flames from the structure.

Abstract: An apparatus for use with a dissolution testing device comprising a vessel and a shaft with a stir element affixed to one end thereof for placement within the vessel. In one embodiment, the apparatus has a front portion having a first jaw portion and a back portion having a second jaw portion. The front portion is slidably coupled to the front portion, and the first and second jaw portions form a jaw interposable between the bottom of the stir element and the inside bottom of the vessel. The jaw has a jaw distance corresponding to the position of the front portion relative to the back portion. The apparatus also includes a shaft alignment portion for aligning the apparatus parallel to the shaft, and a measurement portion for providing a distance reading corresponding to the gauge jaw distance.

Abstract: A method and system for acquiring an optical target affixed to a surface of a package with an optical scanning device. Height information associated with the height of the surface of the package is sensed and a height signal representative of a scanning distance between the optical target and the optical scanning device is generated. The package surface is scanned with the optical scanning device to generate an optical target input signal. The optical target input signal is converted in accordance with a first sampling frequency to provide a converted input signal, and a second resampling frequency is adjusted in accordance with the height signal. The converted input signal is reconverted in accordance with the second resampling frequency to generate a frequency shifted optical target signal, and the optical target on the surface of the package is acquired in accordance with the frequency shifted optical target signal.

Abstract: A cash box proximity switch arrangement is provided for public telephones and is mounted in an upper portion of a lower housing of the telephone above the vault area. The switch is contained in a sealed housing which prevents contamination from dirt, moisture and the like. A magnet can be arranged so as to provide a bi-stable magnetic circuit between the floor of the lower phone housing and a cash box lid attached to a cash box which has been installed in the vault area of the telephone housing.

Abstract: A water heater comprising a water container; a combustion chamber adjacent the water container; a burner associated with the combustion chamber; a flue connected to the combustion chamber; a blower assembly positioned to receive combustion products from the flue and including a blower; at least one inlet having a plurality of ports which permit air and extraneous fumes to enter the combustion chamber and prevent combustion of extraneous fumes outside of the combustion chamber; a temperature sensor positioned adjacent the inlet; and a controller connected to the blower and the temperature sensor, the controller being capable of activating the blower in response to temperature changes detected by the temperature sensor.