Magnetic Junk Basket Assembly for Drill Strings (Patent No: 653327)

Inventor: Crooks, George C.

Location: Red Deer

Comments: N/A

Description:
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. In an electrical circuit for the measurement of oxygen concentration in a mixture of gases by means of a detector cell subject to decay of electrical output, a detector circuit, a first auxiliary circuit powered by a source of auxiliary power supply subject to decay of the same order of magnitude as the decay of said detector cell, means for adjusting the decay rate of said auxiliary power supply and circuit connections between said auxiliary power supply and said detector cell opposing the current and decay from said sources to each other in parts of the circuit, a third circuit powered by an independent auxiliary power supply source subject to a rate of decay of the same order as that of the first source of power, means for adjusting said decay rate, and circuit connections injecting a part of the current of said independent auxiliary circuit into a part of said detector circuit, wherein the amount and decay rate are decreased by opposition from said first auxiliary circuit.

2. In an electrical circuit for the measurement of oxygen concentration in a mixture of gases by means of a detector cell subject to decay of electrical output, a detector circuit, a first auxiliary circuit powered by an auxiliary power supply source subject to decay of the same order of magnitude as the decay of said detector cell, means for adjusting the decay rate of said auxiliary power supply source, and circuit connections between said auxiliary power supply source and said detector cell circuit opposing the current and decay from said sources to each other in parts of the circuit, a third circuit powered by an independent source subject to a rate of decay of the same order as that of the first mentioned source, means for adjusting said decay rate, and circuit connections injecting a part of the current of said second auxiliary circuit into a part of said detector circuit, wherein the amount and decay rate are decreased by opposition from said first auxiliary circuit, and means for adjusting the decay rates of said two auxiliary power sources until the net decay rate in a part common to all three circuits is equal to zero.

3. In an electrical circuit for the measurement of oxygen concentration in a mixture of gases by means of a detector cell subject to decay of electrical output, a detector circuit, a detector cell in said circuit, a first auxiliary circuit powered by a source of power subject to decay of the same order of magnitude as the decay of said detector cell, circuit connections between said auxiliary and said detector circuits opposing the currents and decay from said sources to each other in parts of the circuit, including a means for adjusting the' amount of current injected from said auxiliary circuit into said detector circuit, a third circuit powered by an independent source subject to decay of the same order as the first auxiliary source, means for injecting the current from said second auxiliary circuit into a circuit part that is common to the detector circuit and the said first auxiliary circuit, and means to adjust the amount of the injected current from the second auxiliary circuit until the decay rate in a part common to all three circuits is equal to zero.

4. In an electrical circuit for the measurement of oxygen concentration in a mixture of gases by means of a detector cell subject to decay of electrical output, a detector circuit, a detector cell in said circuit, a first auxiliary circuit powered by a source of auxiliary power supply subject to decay of the same order of magnitude as the decay of said detector cell, means for adjusting the decay rate of said auxiliary power supply, circuit connections between said auxiliary circuit and ea1d detector circuit opposing the current and decay from said sources to each other in parts or the circuit and means for adjusting the current in one or the elements or said circuit connections to control the amount of opposition introduced from the auxiliary circuit into the detector circuit, a second auxiliary circuit with an independent power source, means for adjusting the rate of decay of said power source, circuit connections for combining an adjustable part of the current output of said second auxiliary circuit with a part or the detector circuit, that is modified by combination with said first auxiliary circuit, and adjusting the decay rate of the two auxiliary circuits and the amount of their interaction with the detector circuit until a zero decay rate is obtained in a part of the circuit where all three circuits are combined.















5. In an electrical circuit for the measurement or oxygen concentration in a mixture of gases by means of a detector cell subject to decay of electrical power output and in which the rate of said decay is depending on the current burden, a detector circuit, a detector cell in said circuit, a first auxiliary circuit and circuit connections between said auxiliary circuit and said detector cell circuit opposing the current burden on said detector cell, a second auxiliary circuit powered by a source of electric power subject to a decay of the same order of magnitude as the output from said detector cell after its decrease by the first auxiliary circuit, means for injecting an adjustable part of the current from said second auxiliary power source into a part of the circuit wherein the electric current from the detector cell and the decay rate is already substantially decreased by combination with the first auxiliary circuit and means for adjusting the decay rate of said second auxiliary power source until the net decay rate in a part common to all three circuits is reduced to a minimum.