A signal monitoring device useful to monitor power consumption level employs a phase locked loop and an associated frequency reduction circuit to convert relatively low frequency input pulse signals to an output signal representative of power consumption.

A torque responsive apparatus for controlling a fluid actuated control device includes a first shaft connected to a drive motor and a second shaft connected to the first shaft through a coupling device that controls fluid pressure in a hydraulic control system whereby torque delivered to the coupling device effects shifting of the coupling member to vary the size of an opening through which a control fluid is being passed whereby a change in fluid pressure will result which is proportional to th...

A microfilm viewing monitor, that is adapted to illuminate and enlarge microphotographic material and display images thereof on a viewing screen, is provided for use in environments that include substantial ambient light. The monitor includes an improved illumination-display system in which the viewing screen comprises a two-element sandwich, including a Fresnel lens for receiving and converging illuminated image bearing light rays with a semi-specular lens for diffusing and focusing those rays,...

A nozzle monitor is disclosed. The monitor includes a hollow trunnion rotatably mounted on fluid delivery conduits. A fluid cylinder device, acting through continuous loop chain and sprocket assemblies, rotates the trunnion about a first axis. A spray nozzle assembly, including an elbow, is rotatably mounted on the trunnion and is capable of rotating in a 360.degree. arc about a second axis which is orthogonal to the first mentioned axis. A rotary motor and transmission drives the spray nozzle a...

A respiration monitor in which inspired and expired air is directed to flow past one end of a plurality of tubes which have their other ends associated with an air flow transducer. Bidirectional air flow past the one end of the tubes induces unidirectional air flow at the other end which is detected by the transducer to provide output signals with each flow movement of air to indicate respiration. A monitor is connected to the transducer and provides an output alarm when output signals terminate...

A coincidence measuring circuit responding to the output signals from first and second scintillation counters adapted respectively to respond to alpha particles and X-rays produced by a monitored environment provides reliable detection of plutonium in the presence of other radioactive elements such as radon and its daughter products.

A contraction monitor includes an optical strain gauge having a frame and a reed flexible with respect to the frame. A light emitting element and a photosensitive element are provided with one of the elements fixed to the frame and the other of the elements carried by the reed to vary the distance separating the elements. The resulting signal from the photosensitive element, which has a magnitude variable with the separation distance, provides an indication of the strain in the reed. Two pair of...

An automatic detection system utilizing fluorescence in a highly sensitive protein assay is described. The system in one preferred embodiment employs a unique three-way valve as a stream sampler to monitor the eluate from a protein column through the detector section of the system. Protein content in the sample stream is determined by forming a fluorophor with the protein in the sample using a newly developed class of fluorogens which react with the primary amine groups of the protein. The resul...

A self-monitoring system for batteries which continuously scans individual cells in succession and signals faulty cells at intervals determined by the sequencing rate and the number of cells being monitored.

A monitor circuit for indicating the change of state of one of a plurality of signalizing switching elements, each switching element controlling according to its state the state of an electronic switch, said electronic switches controlling indicating means.