Device for determining the transparency of the atmosphere between two points comprising one light transmitter and one receiver respectively on the two points, optic fibers connecting the corresponding transmitters and receivers, means to separate the data coming through the atmosphere and through the fibers and a data processing device connected to said means.

The automatic weaving looms of a textile plant are individually enveloped by hoods of acoustical insulation material suspended from hoists and sealingly engaging the floor about the associated machines. Air at controlled temperature and humidity is supplied to the interior of each hood and exhausted from that interior through a system of manifold pipes having orifices in the floor under each hood, and valves in the orifices which open automatically as the hood descends into the operative positio...

This disclosure relates to a resistance seam welder for welding lapped sheet material, particularly can bodies, and includes means for effecting inert gas flow between roller electrode surfaces and the interface of the lapped can body edge portions, the flow effecting means being in the form of a manifold into which is introduced inert gas while flexible sealing means are provided for sealingly contacting opposite surfaces of the can body edge portions. In one embodiment of the invention the man...

System for maintaining an atmosphere at a desired pressure in a shell containing a motor, the shell being subjected to conditions such that leakage of atmosphere and reduction in pressure may occur.

Apparatus which permits treatment of products with ionizing radiation in a controlled atmosphere comprises an inner chamber positioned within an outer chamber, the workpiece to be treated passing through the inner chamber. The outer chamber has a radiation-permeable window in one surface and the second chamber has means for the passage of radiation in juxtaposition with the window in the outer chamber. The apparatus may also contain means for carrying the product to be treated, as well as coolin...

A fire detector having an ionization sensing means which changes the level of an output signal in accordance with sensing the presence of smoke in the atmosphere has been provided. A detecting means selectively responsive to the output signal generates an alarm control signal and the improvement includes a filter means for rendering a detecting means operable if uninhibited to generate the alarm signal irrespective of an output signal from the sensing means. Inhibiting means normally operable to...

An apparatus and method for casting metal strip include a moving chill body that has a quench surface. A nozzle mechanism deposits a stream of molten metal on a quenching region of the quench surface to form the strip. The nozzle mechanism has an exit portion with a nozzle orifice. A depletion mechanism supplies a reducing gas to a depletion region located adjacent to and upstream from the quenching region. The reducing gas reacts exothermically to lower the density provide a low density reducin...

Contamination in the atmosphere is sensed and identified using unsealed d mode resonators and a means to clean the resonators in an ongoing method to measure contamination induced frequency change with time, while compensating for temperatures induced frequency shifts.

An atmosphere control system, including, a standard gas supplying device for supplying a gas of a determined composition, an oxygen concentration controlling device connected to the standard gas supplying device for adjusting oxygen concentration of the gas of the determined composition, an atmosphere holding device connected to the oxygen concentration controlling device for receiving the oxygen concentration adjusted gas, and an oxygen concentration measuring device arranged at the upstream si...

Apparatus for severing a plurality of plies of a thermoplastic material and sealing the severed margins thereof is provided. The apparatus comprises a hot-wire element proximate the thermoplastic material for severing and sealing the thermoplastic material. The apparatus further comprises a chamber or manifold for enveloping the hot-wire element in an inert atmosphere which impinges on a proximal portion of the thermoplastic material to be severed and sealed. The apparatus further comprises an a...