A system to continuously detect oil concentration levels in water flowing through a pipe having a transparent shunt path illuminated by an ultraviolet light source and a photo-cell detector responsive to light irradiation intensities therefrom. A second shunt path and small pump are provided about the first shunt path enabling the system to be zero balanced for ambient conditions of the principal liquid and alarm tripping calibrated under dynamic conditions for a predetermined concentration leve...

A dynamically matched set of golf clubs having identical moments of inertia with respect to a common swinging axis and, starting with a selected favored club, the method of determining by calculation from simple length and weight parameters, the head weights required for dynamically matching the other clubs of the set to the favored club. Use is made of the fact that the moment of inertia of a conventional golf club with respect to a swinging axis can be represented by the summation of the momen...

An extended selection field for use in selecting one or more choices from a list on an information system display. The extended selection field exhibits the behavior and appearance of a standard single choice field, with the additional capability to switch into a multiple choice mode to override the single choice restriction. A single choice is selected using the standard technique of moving the selection bar to the desired choice and pressing the Enter key. However, the single choice restrictio...

An amplifier (102) which can be dynamically biased is disclosed. A controller (118) determines when to change the bias to the amplifier (102), in order to achieve low frequency splatter. This is accomplished by changing the bias level of amplifier (102) between a substantially linear (class A) mode of operation, and a substantially nonlinear (class B) mode of operation. During the critical periods when the amplifier (102) is being turned into and out of operation, the amplifier (102) is placed i...

An exposure control system for photographic apparatus of a variety utilizing a solenoid actuated exposure mechanism drive. Consistent dynamic performance for the system is achieved through an arrangement wherein the solenoid is coupled to be operated only against the substantially constant retarding force of a spring, while exposure mechanism movement, with attendant mass-accelerative characteristics, is provided by isolated spring drives.

Dynamic controls and jaw mechanism for a forming machine adapted to impart compound curvatures to a metal sheet. The setting of the machine, particularly in its first and third stages, is dynamically controlled by a tracer and transducer system whereby, as for example, the vertical and horizontal positions of the first stage relative to the second are predetermined as is the relative horizontal position of the third stage. Enhanced responsiveness is achieved by the provision of roller bearings f...

Apparatus for variably assigning relative priority levels for access of peripheral units to the memory of a data processing system, wherein each peripheral unit generates a request signal when it requires access to communicate with the memory through a channel connected to the central processor of the system, wherein concurrently occurring request signals are selected according to priority levels assigned thereto, and wherein means is provided to change the priority levels to particular request ...

An apparatus and method for investigating a borehole with energy transmissions whose directivity is varied in real time during the investigation is described. A plurality of transmitters are employed on a well logging tool with at least one receiver located ahead of the transmitters. The transmitters are repetitively activated to transmit a wave of energy to the receiver which produces a received wave. A parameter of the received wave is derived and used to vary the relative delay of activation ...

A phonograph pickup arm device wherein one end of a balance weight is connected to one end of an arm through a spring, and a first magnet is supported at the other end of the weight and is immersed in a viscous oil. A second magnet is disposed for displacement toward or away from the first magnet for adjusting the magnetic force acting therebetween so that the compliance of the device which is related to the arm resonance frequency, may be changed and consequently the arm resonance amplitude may...

A method of and apparatus for the manufacture of dynamically balanced molded plastic air movement devices wherein material may be readily added or deleted from inactive surface portions of the air movement devices during manufacture by adjustable pins accessable from the front or face of a mold half.