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Lorin Rollins Stieff

from Sarasota, FL
Deceased

Lorin Stieff Phones & Addresses

  • 555 Gulfstream Ave, Sarasota, FL 34236 (941) 952-1765
  • 555 S Gulfstream Ave UNIT 1104, Sarasota, FL 34236 (941) 952-1765
  • 9507 Stanhope Rd, Kensington, MD 20895 (301) 949-9507
  • Frederick, MD
  • 9507 E Stanhope Rd, Kensington, MD 20895 (301) 949-9508

Work

Position: Retired

Education

Degree: High school graduate or higher

Resumes

Resumes

Lorin Stieff Photo 1

Lorin Stieff

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Location:
United States

Business Records

Name / Title
Company / Classification
Phones & Addresses
Lorin R. Stieff
Owner, President
Stieff Research and Development Co Inc
Management Services
9507 E Stanhope Rd, Kensington, MD 20895
(301) 949-9508

Publications

Us Patents

Radon Progeny Monitor

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US Patent:
7312439, Dec 25, 2007
Filed:
Aug 17, 2004
Appl. No.:
10/919526
Inventors:
Payasada Kotrappa - Frederick MD, US
Lorin R. Stieff - Kensington MD, US
John C. Dempsey - Frederick MD, US
Assignee:
Rad Elec Inc. - Frederick MD
International Classification:
G01V 5/00
US Classification:
250255, 250DIG 2
Abstract:
A new type of radon progeny monitor called an electret radon progeny integrating sampling unit (E-RPISU) using an electret ion chamber to measure radon progeny concentration. A conventional 1 LPM particulate air sampling system is used to collect the radon progeny on a roughly 3. 5 cmfilter that is mounted on a side of an electret ion chamber such that the collected progeny are exposed to the inside of the chamber. Alpha radiation emitted by the progeny collected on the filter ionizes the air in the approximately 220 ml chamber. Ions of opposite polarity collect on the surface of the electret of suitable thickness and reduce its surface voltage. A specially built surface voltmeter is used to measure the electret voltage before and after sampling. The electret voltage drop that occurs during the sampling period is proportional to the time integrated progeny concentration. A similar unit with a screen in the place of filter is used to measure unattached progeny concentration.

Measurement Of Undisturbed Radon Ground Surface Flux Using A Passive Radon Surface Flux Monitor

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US Patent:
8153959, Apr 10, 2012
Filed:
Oct 10, 2008
Appl. No.:
12/287523
Inventors:
Lorin R. Stieff - Sarasota FL, US
Frederick Stieff - Leesburg VA, US
Assignee:
Rad Elec Inc. - Frederick MD
International Classification:
G01V 5/00
US Classification:
250253
Abstract:
A passive radon surface flux monitor has a dome with an open base having a radial flange and a top opening where an electret can be threaded. Attached to and extending below the open base of the dome is a metal collar that supports the dome when placed on the ground. The collar holds a conductive screen against the radial flange. The conductive screen permits diffusion of gas including radon, thoron, and their daughter products into the dome. A thin paper diaphragm on the conductive screen prevents dust from entering the dome. Sealant seals the connection of the collar, screen, flange, and diaphragm to prevent lateral loss of radon. A collar is pressed partially into the ground at a suitable site and an electret is threaded into the top opening. After a time, the electret is removed and its change in voltage measured.

Gamma Radiation Compensated Radon Measurement System

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US Patent:
51285401, Jul 7, 1992
Filed:
May 1, 1991
Appl. No.:
7/694295
Inventors:
Lorin R. Stieff - Kensington MD
Assignee:
RAD Elec, Inc. - Frederick MD
International Classification:
G01T 100
US Classification:
250255
Abstract:
A gamma radiation compensated radon measurement system includes a housing and cooperating tube assembly that define a first, larger sensing volume and second, smaller sensing volume, each of which includes an electrically charged electret. When in its operative configuration, the first and second volumes are in communication with one another so that both volumes are exposed to the same radon concentration as well as the same gamma radiation. A partition separates the two sensing volumes so that ions formed in one sensing volume do not enter the other sensing volume. The two electrets are exposed to their respective sensing volumes to accumulate ions at different rates determined by the design characteristics of the two sensing volumes. The response characteristic of each electret/sensing volume combination is mathematically modelled and the radon and/or gamma concentration is be determined by simultaneously solving the characteristic equations for each electret/sensing volume combination.

Fiber Optic Seal Assembly

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US Patent:
40744159, Feb 21, 1978
Filed:
Feb 14, 1977
Appl. No.:
5/768435
Inventors:
Lorin R. Stieff - Kensington MD
International Classification:
B25B 2702
US Classification:
29520
Abstract:
A fiber optic seal assembly tool has a stripper for stripping a predetermined length of tubing from an end of a fiber optic bundle. The stripped end is inserted in a seal block and the block is gripped in a hand tool. An actuating lever is squeezed, biasing bundle clamps closed, and sliding a grooved anvil toward the block to press a collet chuck which holds the fiber ends into the block. When the collet is pressed into the block, ends of the fibers are sheared by a knife which moves in the anvil opening.

Security Sealing System Using Fiber Optics

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US Patent:
40958728, Jun 20, 1978
Filed:
Jan 13, 1977
Appl. No.:
5/759161
Inventors:
Lorin R. Stieff - Kensington MD
Charles L. Pruitt - Hyattsville MD
Reinhard R. Ulrich - Rockville MD
Frank S. Houck - Falls Church VA
Assignee:
The United States of America as represented by the Secretary of the Army - Washington DC
International Classification:
G02B 516
US Classification:
350 9624
Abstract:
The invention is directed to a security device which detects tampering with secured closure. A fiber optic bundle is looped through a closure and secured at opposite ends of the bundle to a collar. After installation, light is passed through the fiber optics and they generate a particular pattern at a viewing end of the collar. If there is any tampering with the enclosure, the individual fiber optics will be disturbed or cut. Subsequent viewing of the fiber optics will generate a different viewing pattern indicating that tampering has occurred.

Field Method For Detecting Deposits Containing Uranium And Thorium

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US Patent:
42163803, Aug 5, 1980
Filed:
Feb 21, 1978
Appl. No.:
5/879578
Inventors:
Lorin R. Stieff - Kensington MD
International Classification:
G01V 500
G01T 500
US Classification:
250255
Abstract:
Locations of buried deposits containing uranium are determined by detecting the presence of Pb214, Bi214, Po214, Pb210, Bi210 and Po210 in solutions obtained by chemically leaching these elements from rocks and soil. Alpha sensitive nuclear emulsions are exposed to the alpha decay of Po214 and Po210. The emulsions are developed to display alpha tracks. Alpha track population as a function of sample size, volume of solution used, emulsion area and exposure measures concentration of Po214 and Po210 in the sample. Anomalus concentrations suggest presence of buried deposits containing uranium. Similar anomalus concentrations of alpha tracks from Bi212 and Po212 formed in emulsions exposed to leach solutions containing Pb212, Bi212 and Po212 suggest deposits containing thorium. Plotting normalized alpha track population (numbers of alpha tracks per gram, per square mm. , per hour) and sample locations suggest mineral deposit locations.

Method And Apparatus For Measuring Air Infiltration Rate Into Buildings

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US Patent:
44453647, May 1, 1984
Filed:
Jan 19, 1982
Appl. No.:
6/340589
Inventors:
Lorin R. Stieff - Kensington MD
John C. Dempsey - Elliottville NY
Assignee:
Taggents, Inc. - Kensington MD
International Classification:
G01M 320
US Classification:
73 407
Abstract:
Sources which emit tracer gas at a known constant rate are positioned throughout a building. Samples of air are collected in selected rooms with constant rate adsorbent samplers. Samplers are analyzed in a laboratory to determine the tracer gas concentration during the period sampled, which concentration is compared to the known volume of the building to determine air infiltration rates. The tracer gas emission rate is rendered independent of room temperature by allowing the gas to escape through specially designed orifices which automatically open and close in response to changes in temperature. In one design, an orifice is formed in a material which expands and contracts with variations in temperature surrounded by a second, less elastic material. In another design, the area of an orifice is changed by a needle valve imbedded in a material which expands and contracts with temperature variations to move the needle in and out of the orifice. In another design, a bimetallic coil is positioned in the bottom of a container for adjusting the length of tracer impregnated material projecting out of an opening in the container.

Programmable Controlled-Exposure Radon Measurement System

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US Patent:
51071088, Apr 21, 1992
Filed:
Jun 21, 1990
Appl. No.:
7/541792
Inventors:
Paul R. Ramsey - Woodsboro MD
Lorin R. Stieff - Kensington MD
Assignee:
Rad Elec Inc. - Frederick MD
International Classification:
G01T 102
G01T 114
US Classification:
250253
Abstract:
A programmable controlled-exposure radon measurement system includes a radon detector of the type that is programmably inhibited or enabled at selected times to effect randon measurement. In the preferred embodiment, a radon detector of the type having an electret within a chamber is located at the test site and the container opened and closed to the ambient atmosphere at selected times to limit exposure to certain intervals during the day for a selected number of successive days. The container is opening by an actuator, such as an electro-actuator or a fluidic actuator, under the control of a programmable controller, such as a 7-day timer or a stored program controlled microprocessor. A fail-safe function is provided by which the radon detector is inhibited in the event of a power failure to preserve test data up to the time of the power failure.
Lorin Rollins Stieff from Sarasota, FLDeceased Get Report