Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
159 words
A circuit arrangement for test apparatus used to determine properties of fluids comprising an oscillating probe disposed in contact with the fluid to be tested, a source of electric power, electro-mechanical means interconnected to said electric power source to provide a driving force component for mechanically oscillating said probe, said electro-mechanical means being inclusive of co-active conductor and magnet elements that are moved one with respect to the other by the applied driving force and with said probe moving with one of said elements, a sensor circuit connected to said conductor element for sensing a response force signal component generated therein due to relative movement of said conductor with respect to the flux field of said magnet elements, balance circuits for changing the driving force component as necessary to maintain a desired response force, and means providing a signal level readout indication of the changing levels for the driving force component applied as the desired response force is maintained.
Claim 2
Dependent Claim
159 words
A circuit arrangement for test apparatus used to determine properties of fluids comprising an oscillating probe disposed in contact with the fluid to be tested, a source of electric power, electro-mechanical means interconnected to said electric power source to provide a driving force component for mechanically oscillating said probe, said electro-mechanical means being inclusive of co-active conductor and magnet elements that are moved one with respect to the other by the applied driving force and with said probe moving with one of said elements, a sensor circuit connected to said conductor element for sensing a response force signal component generated therein due to relative movement of said conductor with respect to the flux field of said magnet elements, balance circuits for changing the driving force component as necessary to maintain a desired response force, and means providing a signal level readout indication of the changing levels for the driving force component applied as the desired response force is maintained.
Claim 3
Dependent Claim
22 words
The circuit arrangement of claim 1 wherein the output from said conductor is inclusive of both driving force and response force components.
Claim 4
Dependent Claim
46 words
The circuit arrangement of claim 2 wherein the driving force component that is applied to said electro-mechanical means is additionally applied to an inverting balancing circuit whereby said driving force component is cancelled and only the response force signal component is applied to said sensor circuit.
Claim 5
Dependent Claim
26 words
The circuit arrangement as set forth in claim 3 wherein said inverting balancing circuit is inclusive of a resistance related to the resistance of said conductor.
Claim 6
Dependent Claim
29 words
The circuit arrangement as set forth in claim 1 wherein the output of said sensor circuit is indicative of changes in said response force away from a desired norm.
Claim 7
Dependent Claim
30 words
The circuit arrangement as set forth in claim 5 wherein said driving force balance circuit is inclusive of multiplier components and the output of said sensor circuit is interconnected thereto.
Claim 8
Dependent Claim
28 words
The circuit arrangement as set forth in claim 5 wherein the output of said sensor circuit is a current that is indicative of changes in said response force.
Claim 9
Dependent Claim
32 words
The circuit arrangement as set forth in claim 5 wherein said driving force balance circuit is inclusive of an operational transconductance amplifier and the output of said sensor circuit is interconnected thereto.
Claim 10
Dependent Claim
33 words
The circuit arrangement as set forth in claim 1 wherein said electro-mechanical means and the conductor thereof is inclusive of a single coil for oscillating said probe and for generating said response force.
Claim 11
Dependent Claim
16 words
The circuit arrangement as set forth in claim 9 wherein said coil moves with said probe.
Claim 12
Dependent Claim
65 words
The circuit arrangement as set forth in claim 1 wherein said test apparatus is used for the observation of properties of fluids that change on a time basis, and further comprising means for maintaining said response force constant during an expected period of observation whereby the signal level readout of changes in said driving force component is indicative of the changed properties of said fluid.
Claim 13
Dependent Claim
41 words
The circuit arrangement as set forth in claim 11 wherein said test apparatus is used to determine the coagulation properties of biological fluids and wherein said probe is oscillated longitudinally in contact with said biological fluids during the period of observation.