Hill S Lalin

US Patent:

52514897, Oct 12, 1993

Filed:

Oct 22, 1991

Appl. No.:

7/781501

Inventors:

Hill S. Lalin - Wayne NJ

International Classification:

G01F 1300

US Classification:

73861

Abstract:

A fluid flow measuring device having a positive displacement piston in a precise bore glass flowtube, with flexible diaphragms at opposite ends of the flowtube, to seal the flowtube from the ambient environment. The flowtube is filled with a pure fluid or gas for uncontaminated operation of the piston. Movement of the piston within the sealed flowtube is controlled by controlling the movement of each diaphragm. The diaphragms are supported in a housing connected to each opposite end of the flowtube, with a plenum chamber in communication with each diaphragm, and with means for the ingress and egress of the fluid under flow measurement with the plenum chamber.

US Patent:

52953963, Mar 22, 1994

Filed:

Jul 28, 1993

Appl. No.:

8/098067

Inventors:

Hill S. Lalin - Wayne NJ
William T. Fleming - Marietta GA

Assignee:

Gilian Instrument Corporation - West Caldwell NJ

International Classification:

G01F 300

US Classification:

73861

Abstract:

A positive displacement piston flow meter for measuring air flow comprising a hollow flowtube, preferably arranged in a vertical orientation, having a movable piston disposed in the flowtube for movement between a starting position, preferably at the bottom end of the piston stroke, and an elevated position at the top end of the piston stroke. The piston is reciprocated by means of a pressure relief control valve assembly which controls the ascent and descent of the piston. The piston is physically connected to the pressure relief control valve assembly by means of a flexible string, which causes the piston to automatically close the valve assembly for automatic operation on reaching the bottom end of the piston stroke and to reverse direction.

US Patent:

48965480, Jan 30, 1990

Filed:

Dec 27, 1988

Appl. No.:

7/290580

Inventors:

Hill S. Lalin - Wayne NJ
William T. Fleming - Glen Gardner NJ

Assignee:

Gilian Instrument Corp. - Wayne NJ

International Classification:

G01N 114

US Classification:

7386434

Abstract:

The fluid sampler of the present invention comprises a single-acting pump assembly having a housing, an inlet port and an outlet port, a valve unit including a single inlet valve and a single outlet valve, a control diaphragm mounted in the housing to form a pumping chamber in communication with said inlet valve and said outlet valve, a reciprocative piston for reciprocating said control diaphragm, a motor for driving said piston with said piston being located in a substantially enclosed cavity separated from said pumping chamber by said control diaphragm and a damping assembly integrated in said pump housing for providing a highly damped fluid flow through said pump.

US Patent:

54088860, Apr 25, 1995

Filed:

Dec 17, 1993

Appl. No.:

8/168135

Inventors:

Hill S. Lalin - Wayne NJ

Assignee:

Gilian Instrument Corp. - West Caldwell NJ

International Classification:

G01F 300

US Classification:

73861

Abstract:

A piston flow meter for measuring gas flow through the flow meter comprising a hollow precision bore flowtube in a vertical orientation, with a movable piston containing a valve assembly for movement in concert with the piston between opposite ends of the flowtube. The valve assembly contains a latching mechanism, preferably a magnetic latch, to provide a positive seal across the piston. The magnetic latch is opened when the piston strikes a spring-loaded stop at the top end of the piston stroke, and is closed at the bottom end of the piston stroke.

US Patent:

55620027, Oct 8, 1996

Filed:

Feb 3, 1995

Appl. No.:

8/383451

Inventors:

Hill S. Lalin - Wayne NJ

Assignee:

Sensidyne Inc. - Clearwater FL

International Classification:

G01F 300

US Classification:

73241

Abstract:

A piston flow meter for measuring the flow of a gaseous fluid, such as ambient air, through the flow meter by timing the displacement of a piston in a hollow precision bore flowtube over a fixed distance. The piston is reciprocated from opposite ends of the flowtube by a poppet valve which controls the direction of movement of the piston in the flowtube. Ambient air is drawn into the flow tube from the atmosphere by an external pump connected to an inlet at one end of the flowtube. The flow meter includes a damping assembly for damping pulsations in gas flow through said flowtube with the damping assembly preferably located adjacent the pump inlet to the external pump. The damping assembly comprises damping means which includes a porous member and at least one elastic diaphragm contiguous thereto with the porous member having a multiplicity of voids and a plurality of open channels extending through the porous member to the elastic diaphragm.

US Patent:

43893724, Jun 21, 1983

Filed:

Jul 13, 1981

Appl. No.:

6/282436

Inventors:

Hill S. Lalin - Wayne NJ

International Classification:

G01N 122
B01L 900

US Classification:

422 88

Abstract:

A portable holder assembly in combination with one or more gas detection tubes each of which contain chemical sorbent material. Each sorbent tube has a tapered neck at each opposite end with an opening adapted for drawing ambient gas through the sorbent material. The holder assembly comprises an open ended hollow tubular shell surrounding each gas detection tube, end fitting means for closing the open ends of each shell to form a closed chamber between each shell and each gas detection tube and an O-ring mounted in each end fitting means in surrounding engagement with the tapered neck of each tube for suspending each tube within each shell and for sealing off the open ends of each tube from the closed chamber.

US Patent:

49049879, Feb 27, 1990

Filed:

Dec 16, 1987

Appl. No.:

7/133615

Inventors:

William T. Fleming - Glen Gardner NJ
Hill S. Lalin - Wayne NJ

International Classification:

G08B 2100

US Classification:

340611

Abstract:

An air sampling and alarm control system for detecting the presence of a toxic contaminant in the atmosphere and for providing an audible alarm when insufficient gas flow is present in the system to adequately test for the presence of the contaminant. The alarm control is provided by a pressure switch which is electrically connected in circuit with an audible alarm and pneumatically connected in circuit with the gas flow line connecting the sampling pump to the sampling detector.

US Patent:

47620048, Aug 9, 1988

Filed:

Sep 25, 1986

Appl. No.:

6/911369

Inventors:

Hill S. Lalin - Wayne NJ
William T. Fleming - Glen Gardner NJ
Jorge E. Bermudez - Haledon NJ

Assignee:

Gilian Instrument Corp. - Wayne NJ

International Classification:

G01F 1708

US Classification:

7386105

Abstract:

A gas flow measuring device comprising a flowtube, a soap bubble generator for generating a film of soap, a manually adjustable member for controlling the transfer of the soap film to the flowtube and a set of detectors spaced apart along the flowtube for measuring the time displacement of the soap bubble between the spaced positions of the detectors. The manually adjustable member is preferably a hoop surrounding the flowtube. A soap bubble is formed by immersing the hoop into the soap solution and withdrawing it. A soap film is transferred to the flowtube by raising the hoop to the mouth of the flowtube. In a second embodiment, a sleeve with slots surrounds a flowtube with slots. The sleeve is rotated into alignment with the flowtube to transfer a soap film.