Rubens A Sigelmann

US Patent:

7643381, Jan 5, 2010

Filed:

Jan 23, 2008

Appl. No.:

12/018798

Inventors:

Rubens A. Sigelmann - Seattle WA, US

International Classification:

G04B 19/04

US Classification:

368 81, 368220, 368238

Abstract:

A balanced hands clock. The clock utilizes a single movement, which movement may be located in the minute hand. A gear drive mechanism provides leverage from said movement via a first pivot shaft to drive the hour hand. The clock is mounted in a base for time indicating movement. Covers may be provided to hide the single movement and the gear mechanism, so that no visible drive configuration is visible to an observer.

US Patent:

40146502, Mar 29, 1977

Filed:

Apr 25, 1975

Appl. No.:

5/571507

Inventors:

Rubens A. Sigelmann - Seattle WA

Assignee:

Research Corporation - New York NY

International Classification:

G01N 3316

US Classification:

23230B

Abstract:

A system for measuring the coagulation time of plasma or whole blood. A solution containing the blood sample is irradiated with pulsed ultrasound, and the back-scattered ultrasound is continuously measured. A predetermined quantity of thrombin is then added to the solution, causing the amplitude of the backscattered ultrasound to fluctuate until coagulation occurs. The elapsed time between the addition of thrombin and the inception of coagulation is the coagulation time, and is an indication of the concentration of fibrinogen in the blood sample.