Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
A single current responsive input means adapted to be coupled to the power system for providing an output voltage whose magnitude is dependent on the current at a predetermined point in the power system; a first switch connected to first power storage means and which switches cyclically, independent of the magnitude of the input; a second switch connected to second power storage means and which is trigger switched for power flow from said second power storage means in power system fault trigger response to the amplitude of the input as it reaches a predetermined value; and an indicator to which both switches are connected and which indicates ''''normal'''' when the first switch operates and ''''fault'''' when the second switch operates.
Claim 2
Dependent Claim
120 words
A single current responsive input means adapted to be coupled to the power system for providing an output voltage whose magnitude is dependent on the current at a predetermined point in the power system; a first switch connected to first power storage means and which switches cyclically, independent of the magnitude of the input; a second switch connected to second power storage means and which is trigger switched for power flow from said second power storage means in power system fault trigger response to the amplitude of the input as it reaches a predetermined value; and an indicator to which both switches are connected and which indicates ''''normal'''' when the first switch operates and ''''fault'''' when the second switch operates.
Claim 3
Dependent Claim
66 words
Fault indicator apparatus in accordance with claim 1, wherein the power distribution system is an alternating current one and wherein the input is rectified to produce a unidirectional output proportional in magnitude to the current at the predetermined point in the power system; and with the unidirectional output constituting a multiple component power supply output including a DC component and a pulse component and their sum.
Claim 4
Dependent Claim
39 words
Fault indicator apparatus in accordance with claim 2 wherein the DC component is regulated (constantized) over the minimum to maximum values of the input range and which then serves as a constant power source for operation of the indicator.
Claim 5
Dependent Claim
31 words
Fault indicator apparatus in accordance with claim 2 wherein the current responsive input means includes a current transformer adapted to be inductively coupled to the power system at the predetermined point.
Claim 6
Dependent Claim
43 words
Fault indicator apparatus in accordance with claim 2 wherein the current responsive input means includes a current transformer adapted to be inductively coupled to the power system at the predetermined point; and the core of said current transformer is of a ferrite material.
Claim 7
Dependent Claim
16 words
Fault indicator apparatus in accordance with claim 1 wherein the first and second switches are thyristors.
Claim 8
Dependent Claim
36 words
Fault indicator apparatus in accordance with claim 3 wherein the unidirectional pulse component of the power supply is coupled to said second switch to cause it to close when the pulse amplitude reaches a predetermined value.
Claim 9
Dependent Claim
55 words
Fault indicator apparatus in accordance with claim 3, wherein first and second storage capacitors are supplied as said first and second power storage means for each of the switches, to which they connect; and said first and second storage capacitors being connected to be charged from the constantized DC power source through resistors and diodes.
Claim 10
Dependent Claim
65 words
Fault indicator apparatus as in claim 8, wherein the switches are thyristors operated with dual self triggering magnetic one-shots in series, which speed up the switched wave fronts and then at a lower point in the switched energy, cut off the thyristors sharply such that they are opened; and with the one-shots connected for returning the switches through an indicator winding to the capacitor supplies.
Claim 11
Dependent Claim
46 words
Fault indicator apparatus in accordance with claim 8, said second switch is connected to said second storage capacitor through an avalanche diode of proper value to allow application of power supply triggering pulses of fault level only when said second storage capacitor is essentially fully charged.
Claim 12
Dependent Claim
148 words
Fault indicator apparatus in accordance with claim 1, wherein the indicator means includes a magnetic field structure upon which is placed a tapped coil, one end of which connects to said first switch and the other end of which connects to said second switch; with the coil top being a common return to the constantized DC supply ; a magnetized disc closely fitting an air gap in this structure and with said magnetized disc equipped with two mechanical stops allowing it to rotate through an angle less than 360*; said disc moveable to against a first stop when said first switch fires and against a second stop when said second switch fires; said disc being provided with signal means positioned on said disc to be moved to appear in a window placed above the disc; and with said window being of clear material substantially impervious to outdoor environment.
Claim 13
Dependent Claim
86 words
Fault indicator apparatus in accordance with claim 11, with the indicator means field structure so designed and constructed with proper materials that there exists a remanent magnetizing force in the absence of any energy from either driving switch; with said remanent magnetizing force being in the direction of the last driving pulse and therefore aiding in holding the disc to its last position with therefore a remanent force for both directions; and with both remanent forces being independently adjusted in Magnitude through adjustment of two resistors.
Claim 14
Dependent Claim
35 words
Fault indicator apparatus in accordance with claim 9, wherein a discharge circuit is provided for both said first and second storage capacitors which is effective only when cable excitation and therefor input is cut off.