Vladimir V Pirc

41086082, Aug 22, 1978

Jan 13, 1977

5/758999

Francis William Maher - Milford CT
Vladimir Valentine Pirc - Norwalk CT

The Perkin-Elmer Corporation - Norwalk CT

G01N 114

23259

Sample preparation apparatus for forming a thin layer of diluted blood specimen on a substrate by centrifugal force includes a sample probe having coaxial blood and diluent conduits coupled to respective reversibly-drivable peristaltic pumps having forward operation intakes connected to a diluent supply. A one-way clutch limits the diluent pump to forward operation and the pumps are geared to produce a blood-to-diluent displacement ratio of 2:1. A substrate holder is mounted on a carriage for selective insertion into and removal from a sealed centrifuge chamber in which it is spun at a high angular rate by a drive motor. Means are provided to form a curtain of flowing liquid within the chamber surrounding the spinning substrate to collect spun-off blood particles and aerosol. The liquid forming the curtain is drained by an exhaust pump which operates after spinning has ceased so as to create a partial vacuum for draining off residual aerosol prior to unsealing the centrifuge chamber.

40168280, Apr 12, 1977

Mar 22, 1976

5/669015

Francis William Maher - Milford CT
Vladimir Valentine Pirc - Norwalk CT

The Perkin-Elmer Corporation - Norwalk CT

B05C 1108

118 6

Sample preparation apparatus for forming a thin layer of diluted blood specimen on a substrate by centrifugal force includes a sample probe having coaxial blood and diluent conduits coupled to respective reversibly-drivable peristaltic pumps having forward operation intakes connected to a diluent supply. A one-way clutch limits the diluent pump to forward operation and the pumps are geared to produce a blood-to-diluent displacement ratio of 2:1. A substrate holder is mounted on a carriage for selective insertion into and removal from a sealed centrifuge chamber in which it is spun at a high angular rate by a drive motor. Means are provided to form a curtain of flowing liquid within the chamber surrounding the spinning substrate to collect spun-off blood particles and aerosol. The liquid forming the curtain is drained by an exhaust pump which operates after spinning has ceased so as to create a partial vacuum for draining off residual aerosol prior to unsealing the centrifuge chamber.

52667499, Nov 30, 1993

May 28, 1992

7/889568

Donald T. Dolan - Ridgefield CT
David D. Kelly - Shelton CT
Vladimir V. Pirc - Norwalk CT

Pitney Bowes Inc. - Stamford CT

G01G 2302

177154

This invention relates to locking mechanism for a weighing scale capable of weighing flat articles at a high rate and with a high degree of accuracy. The locking mechanism of the instant invention is applicable to a vibrating tray type scale which requires a mechanism for stabilizing the base of the scale during periods when articles are being conveyed onto and off the tray of the scale. An electromagnetic locking mechanism has been conceived that provides advantageous for a vibrating tray scale. These advantages are simple construction, low cost, self compensating and zero force requirement. With a such locking mechanism, the vibrating tray scale functions more accurately and rapidly.

48420840, Jun 27, 1989

Dec 29, 1988

7/290348

Vladimir V. Pirc - Norwalk CT

Pitney Bowes Inc. - Stamford CT

G01G 1900
G01G 2302
G01G 314

177145

A locking mechanism for securing the tray of a scale during the transporting of flat articles, such as envelopes, onto and across the tray of the scale. When a flat has been placed in a position for weighing, the conveying mechanism is put into an inoperative mode and causes the locking mechanism to release the tray. After the article is weighed, the conveying mechanism is placed into the operating mode and acts upon the locking mechanism to cause it to once more secure the tray.

48441880, Jul 4, 1989

Dec 29, 1988

7/290349

Vladimir V. Pirc - Norwalk CT
Thomas W. Alesi - New Fairfield CT

Pitney Bowes Inc. - Stamford CT

G01G 1900
G01G 1952
B65G 1500

177145

A mechanism for transporting flat articles, such as envelopes, onto and across the tray of a scale. A belt is trained about a combination of rollers received within slots of the tray which in combination with clamps supported by the tray are used to transport a flat onto the weighing scale. When a flat is to be weighed, it is transported onto the tray, the rollers are withdrawn below the tray by the belt and the clamps hold the flat securely against the tray. The tray is then oscillated and the weight of the flat is determined from the harmonic period of oscillation. Upon completion of weighing, the belt is placed into contact with the flat and rotated to remove the flat from the tray.

40370038, Jul 19, 1977

Jan 13, 1977

5/758998

Francis William Maher - Milford CT
Vladimir Valentine Pirc - Norwalk CT

The Perkin-Elmer Corporation - Norwalk CT

A01N 102
B05C 1102
G01N 128

427 2

Sample preparation apparatus for forming a thin layer of diluted blood specimen on a substrate by centrifugal force includes a sample probe having coaxial blood and diluent conduits coupled to respective reversibly drivable peristaltic pumps having forward operation intakes connected to a diluent supply. A one-way clutch limits the diluent pump to forward operation and the pumps are geared to produce a blood-to-diluent displacement ratio of 2:1. A substrate holder is mounted on a carriage for selective insertion into and removal from a sealed centrifuge chamber in which it is spun at a high angular rate by a drive motor. Means are provided to form a curtain of flowing liquid within the chamber surrounding the spinning substrate to collect spun-off blood particles and aerosol. The liquid forming the curtain is drained by an exhaust pump which operates after spinning has ceased so as to create a partial vacuum for draining off residual aerosol prior to unsealing the centrifuge chamber.