Sanford Lawrence Simons
Engineers at Turkey Crk Rd, Morrison, CO

D287401, Dec 23, 1986

May 5, 1983

6/491745

Sanford L. Simons - Morrison CO

D24 3

4040788, Aug 9, 1977

Apr 5, 1976

5/673765

Sanford L. Simons - Morrison CO
Frederick M. McNeill - Denver CO

G01N 3316, G01N 2128

23230R

Instrument apparatus and method for the cyclically concurrent display of the time related transitional characteristics of a plurality of samples, at least one of which may be a laboratory standard of known value, or all of which samples may be unknown. Separate electrical signals derived as the samples are simultaneously activated, exposed, treated, analyzed or observed are gated by multiplexing circuits on a split time basis that may allot equal or varied time periods for the separate samples. The strength of the signal from the samples may be separately or cooperatively adjusted to enhance comparison or differential features as the signals are delivered to display components for study or recording. Where strip chart or other index marking recorders having a time related movement pattern are utilized, the sequential signals derived for each sample progressively provide traces, the length or arc of which is a derivative of the then occurring rate of reaction for the sample and the process to which it is being subjected, and this trace length then provides a graphical representation of the instantaneous slope or rate of change for that sample. As an example, the apparatus is used in aggregation or other studies of blood samples wherein components of the instrument provide a controlled temperature environment, rate controlled and identical stirring, even lighting with ambient light influence correction, and selective release and recording of single or multiple signals.

4026671, May 31, 1977

Aug 2, 1976

5/711038

Sanford L. Simons - Morrison CO
Frederick M. McNeill - Denver CO

G01N 3316, G01N 1116

23259

A circuit and apparatus combination for maintaining a balanced or regulated operational condition in test apparatus that includes mechanical drive and sensor elements as the sensor is exposed to the changing conditions experienced in a test sample or a sampled environment. The circuit automatically drives mechanical elements of the system at a resonant frequency or at other prescribed conditions with voltage changes at an output section of the circuit being indicative of changes in the sample tested or in the sensors environment. Drive elements of the circuit are powered by a drive voltage to cause movement of the sensor and the changing power thus used is evaluated and cancelled out, while a separate input or response voltage that is derived from the resulting movement of the same drive elements is introduced to an Operational Transconductance Amplifier together with an input control current likewise derived from such response voltage. The output current therefrom, which is a product of the separate input voltage times the input control current times a constant related to the transconductance amplifier, provides the changing drive voltage that is necessary to maintain the mechanical elements and sensor at their resonant or otherwise regulated and desired condition as the sensor environment changes. The changing drive voltage as the sensor is exposed to changing conditions provides a readout at an output section of the circuit that is indicative of changes in the sample or the sensor environment.

D272088, Jan 3, 1984

Mar 16, 1981

6/243755

Sanford L. Simons - Morrison CO

D2402, D1505

D24 8

D270818, Oct 4, 1983

Mar 16, 1981

6/243757

Sanford L. Simons - Morrison CO

D1005

D10 84

D270819, Oct 4, 1983

Mar 16, 1981

6/243758

Sanford L. Simons - Morrison CO

D1005

D10 84

D271335, Nov 8, 1983

Mar 16, 1981

6/243756

Sanford L. Simons - Morrison CO

D2402

D24 99

D260232, Aug 18, 1981

Aug 27, 1979

6/069628

Sanford L. Simons - Morrison CO

D0809, D1303

D 8350