I have an older Heathkit Weather Station with LED displays (ID-4001) but when I connected a ribbon cable to the data port it made a very large amount of radio interference just by being connected. Maybe the later model with an LCD display and RS-232 interface solved that problem.
U.S. Department of Energy -
Measurement (ARM) Program- Program
El Paso NWS Weather Page - The Weather Calculator Script Files -
World Meteorological Organization -
American Meteorological Society -
NorthEast Media of Atmospheric Science -
Exploratorium - Watching Weather: A Low Pressure Book about High Pressure Systems -
Oxenhope Weather Station Data - An automated weather station used to allow a telescope to determine on it's own if it can look into the night sky! Cloud Sensor -
MIT - Lincoln Labs - Aviation Weather - Overview -
Office of the Federal Coordinator for Meteorological Services (OFCM) - Publications - Federal Standards for Siting Meteoroligical Sensors at Airports -
National Lightning Safety Institute - Links -
Emergency Digital Information Service (EDIS) - California EDIS Message Archive - the EDIS page was down when I edited this page
Air Force Combat Climatology Center - Air Force Weather Technical Library Links -
Joint Weather Training Facility - at Keesler AFB -
Air Pressure - Height & Temperature - Copyright © 1996-1998 Texas A&M University
Space Weather Aeronomical Responses Model - software package that gets it's inputs form the internet
Robo Weatherman -
1-Button - based on Dallas Semi 1-wire technology (also see Texas Weather)
Allentown Weather Center - Weather Instruments - by Tommy Owens -
American Weather Enterprises -
Amplicon - data loggers
Applied Technologies, Inc. - links - Sonic Anemometers, Hygrometers, Data Collection and Processing, Relaxed Eddy Accumulators (REA), Flux measurement Systems, Radar, and other Meteorological Equipment
Ben Meadows Company - water measers & general outdoor
Boltek - StormTracker detects lightning strikes up to 300 miles away and plots them in real time on a map of your area.(magnetic detection)
Campbell Scientific, Inc. - complete tower type stations
Casella - solarimeter - an other instruments
Data Professionals - Heathkit parts - Heathkit ID-4001 CPU Adapter Board with serial I/O and EEPROM memory
Davis Instruments Corp - WeatherLink Toolbox™ 1.0 (web publishing tool) - Scientific Sales, Inc. - good prices
Dynamax Inc. - plant bio-sensors, plant transpiration measurement, plant bio-productivity and environmental conditions
Exponential Software -
Fascinating Electronics, Inc. - Observer Meteorological Station -
Forest Technology Systems -
FT Technologies Ltd - FT702 Ultrasonic hand held or fixed mounted Anemometer -
General Eastern Instruments - Protimeter - moisture meters
Handar - Ultrasonic Wind Sensor -
Instrumentation météorologique à l'usage -
ISA, the International Society for Measurement and Control. - search results for "METEOROLOGICAL INSTRUMENTATION" -
IRDAM SA - no moving parts "wet finger" wind speed & direction method- US Patent No 4905513 -
JS Exports (India) - Campbell-Stokes Sunshine recorder
Maximum - WeatherMAX - TriGeo (web tool)
MesoTech International -
Morgan Weather Measurement System - PIC based
NovaLynx - large catalog of weather stuff
Onset - data loggers
Oregon Scientific, Inc. - Weather products - Model WM 918 is carried by Radio Shack as the WX-200 (63-1015) - Parts page -
Paroscientific - pressure & other weather instruments
Questech inc. - makes the Heathkit ID-5001 weather station & has some parts for the other Heathkit weather stations ( http://www.questech-inc.com/ is no longer a valid link, they probably are out of business?)
Peet Bros. - Ultimeter 2100 Weather StationUS4969358: Electronic altimeter/barometerPoint Six - Based on Dallas Semiconductor 1- wire technology
US05361633 11/08/1994 Method and apparatus for wind speed and direction measurement
US05231876 08/03/1993 Method and apparatus for wind speed and direction measurement
US05033402 07/23/1991 Metric/English orometer
US05001929 03/26/1991 Electronic altimeter
US04969358 11/13/1990 Electronic altimeter/barometer
RainWise - WS-2000 418 MHz Weather Station -
R. M. Young Co. - 3D ultrasonic wind speed & other weather instruments
Robert White Instruments - more than 40 years as an instrument dealer. Weather & Marine Instruments
Sensor Metrics, Inc.- Environmental Measurement Systems
Stormwise - Home Lightning Detection and Severe Storm Detection
Texas Weather Instruments, Inc. - Manufacturer of Digital Weather Stations - WR25 - Weather View 32 (web tool) -
Tracking The Eye - free trial version
Unofficial Radio Shack WX-200 Electronic Weather Station Support Page -
Vaisala - electronic measurement systems and equipment for meteorology and the environmental sciences, traffic safety and industry
Weather View 32 - Real-time Weather Station Monitoring with Internet Support -$129 to $999 depending on features
WeatherExperts.com - dealer
Yankee Environmental Systems (YES) - Total Sky Imager (TSI-440A) - Ultraviolet Instrumentation -
". . . . The atmosphere and the earth are part of the same system and rotate together, so if everything was static there would be no friction between the atmosphere and the surface of the Earth.However the atmosphere is a fluid and there is unequal heating between the equator and the poles. The unequal heating causes air density and pressure differences, and the atmosphere develops a circulation. Because the Earth is a rotating sphere the motion of these circulations are deflected to preserve angular momentum. The resulting pattern of atmospheric circulation becomes quite complicated.In the simple case of a non rotating Earth air would rise at the equator and descend at the poles, and at the surface of the Earth there would be a pole to equator ward return flow, that is a northerly wind in the northern hemisphere and a southerly in the southern. This would make a single "cell" of circulation equator to pole in both hemispheres.However as the Earth is rotating, rather than one circulation cell, we have three. The full hemisphere cell mentioned above reaches only to about 30° latitude and is called the Hadley cell (Wiki). The rotation of the Earth affects the cell by deflecting the surface return flow to the west in both hemispheres. These are the NE trades of the northern hemisphere and the SE trades of the southern hemisphere.
The other two circulation cells are the Ferrel (Wiki) and the Polar cell (Wiki). The Ferrel Cell runs in the opposite sense to the direct thermally driven Hadley cell, so the surface winds run the opposite way as well, and are deflected in the opposite way. So in the northern hemisphere in the mid-latitudes the average/predominant wind would be a SW wind. However the Ferrel circulation is much more complicated than this simple picture suggests, and there are flows both north and south, though both are generally from the west."
-------Cheers, Hank Australia Bureau of Meteorology ------------
|After the painters removed it from the house,
it was out of the Sun
and has stopped working.
0. remove battery cover
1. Charge Ni-MH battery in charger 30 mA overnight.
2. Install battery
3. Select Channel 1, 2 or 3
3. Press reset using paper clip for 10 seconds to set channel.
Hold so solar panel is oriented same as when mounted
4. press TEST and see if LED adjacent to TEST button lights green.
The above was not enough. To get sync, see IMPORTANT
There was a problem getting the indoor unit to synchronize
with the new outdoor unit.
|Unit fell on floor breaking off the antenna.
Replaced with some lead wire (solder is easy to shape) and
hot melt glue. Works fine.
Note Channel 1 not synced.
It did after removing the 4 AA batteries and pressing RESET
with paper clip.
May 2020 still working.
Campbell Stokes Sunshine Recorder - Casella CEL - Wiki -
Eppley (Model 2) Precision Pyranometer, Model PSP covers 285 to 2800 nanometers.
SkyScan Severe Thunderstorm Detector
Pilot Baloon (Pibal) theodolites - to follow balloons.
Radiosonde (Wiki) -
Kestrel 5500FW Fire Weather instrument - very sensitive wind speed and direction, better than any others I have.
Wallace & Tiernan FA 181 Altimeter
There are many ways of measuring wind speed.
Ref: Air Currents and the laws of ventilation, Google Books.pdf, Sir Napier Shaw, 1907
The differential between static and ram air pressures can be translated into air speed.
Wind pulls the heat away from thermocouple which is driven harder than when just used to measure temperature.
See patent 2849880 below.
The obsolete Kurz Instruments KRZ480 is a hot wire type.
Alnor Model 9850 Air Velocity MeterThis has two beads in the air tunnel. Not sure why. Maybe for two ranges or something about how it measures? There is an air flow arrow on top of the probe that needs to be properly orientated.
Arrived with dead 9V battery corroded onto to battery snaps. Some care was needed to remove old battery without damaging snaps.
Fig 1 The protective white cap looks like a wire nut but it is not.
Shown in Battery Test mode.
Fig 3 There are two beads.
Fig 4 Sims, Alnor Velometer Jr & Alnor 9850 (Note 1)
Fig 5 Rear row: Alnor 3100 w/2778 Jet, Alnor 9850
Front row: Sims, Alnor Velometer Jr.
The 9850 is the only one that runs from a battery,
so I turn it off most of the time.
Note 1: It's June 2020 and hot. I have the upstairs North facing windows open and the upstairs South windows closed. The front door has a screen and is open. The wind speed meters are just inside the front door. The idea is hot air rises and there should be a natural draft pulling in cooler air from the North side of the house. Note the 9850 hot wire meter is showing wind while the other two meters are not.
This uses a Mercury battery (maybe the same RM42 used in the 8500 combined thermometer and hot-wire anemometer.
Note the RM-42 is very close to the size of a "D" cell.
The Keithley 502 uses a bunch of batteries, including the RM-42 as B3 for tube filaments. 1 each 6118 and 4 each 6119 (Radio Museum: CK6419, CK549DX). Vf=0.625, so two in series is 1.25 Volts, maybe the dead voltage of the RM-42?
Vane in TunnelThe Illinois Testing Labs manufacturers Alnor Scientific Instruments.
Alnor Velometer Jr.aka: ML-433 - has 8" long handle on bottom.
This is a vane in a tunnel type wind speed instrument. A problem is the wind that's being measured consists of ambient air which contains crud. That crud gets inside and there's no easy to clean the inside of the meter glass.
Alnor is another name for Illinois Testing Laboratories.
See patent 2690671 below.
This may be the basis of the ML-433.
A handle is added below the bottom that includes a magnetic compass.
An airfoil shaped wind vane that can rotate 360 degrees is added at the top. It it caged by a slide off "U" shaped sheet metal cover secured by a metal ball chain like used on plumbing stoppers.
TM 11-6660-205-nn where nn might be 14P, 12, 15 ??
Fig 1 leather carry case
Fig 2 Range selects hole size
U.S.A. Pat 2690671 Gr. Br. Pat 754894 others Pend.
Alnor Instrument Co. Chicago, U.S.A.
Fig 3 Vent hole in straight line with range hole
Fig 4 This sheet metal covering tunnel. Weak glue holding.
Fig 5 Vane in Tunnel. Note if vane moves up the crook
in support arm hits end of tunnel. Wind causes vane
to move down. Note wire wound balance stub.
Fig 6 Pressure in tunnel forces vane down.
Alnor Model 3002This is considerably larger and heavier than the Alnor Velometer Jr. above. It also has threaded ports for pressure (left) and vacuum (right) that accept direct jets (probes) or a connection to a rubber tube and a remote jet (probe).
A set was quoted by the Law Instrument Co. Angola, Indiana for the Lafayette City School. It's a kit with fewer accessories than some more expensive set, but should work for the school while saving money ($113.50 v. $171.50 in 1950). The contents of this kit does not match the kit quoted in the letter.
This kit has all matching serial numbers on the meter and Jets. It allows for measuring the flow coming out of outlets (2220) and in flow going into inlets (2225). It also allows using a direct orifice for low speed (2778) or high speed (2420). Note the meter face shows all these Jet (probe) numbers. There is no provision on the meter face to use the meter without any probe or Jet, even though that's mentioned in the Alnor literature.
The 3002 is a very capable model and many of the sets offered on eBay are based on it. This is an all mechanical set, not batteries or electronics so it works great now. Note the Model 6000 is no longer viable because of it's need for the RM-42 Mercury Battery. To be trusted the serial numbers of all the probes (Jets) should match the meter serial number.
Sets and Probes
The 2000 series probes take the small (3/8") tubing. The 3000 series probes take the large (?") tubing.
p/n Description Range Supply (Pres)
1G Set 2G Set 3G Set 4G Set 5G Set 2215 averaging >2000 FPM Pres 2220 Angle Supply Jet
>2000 FPM Pres 2 1 1 1 1 2225 Angle Intake Jet >2000 FPM Vac 2 1 1 1 1 2230 Angle Supply Jet
>2000 FPM Pres 1 1 2245 Small Tubing Fitting <2000 1 2402 Direct Orifice 1000 2420 3000 FPM Direct Orifice Jet >2000 FPM Pres 1 2425 Duct 18" >2000 FPM 1 1 1 2460 Static Pres 1 1 1 1 2485 Total 18" Pres 2726 Replacement Filter Element 2778
300 FPM Direct Orifice Jet
3150 Dust Filter 3290 Duct 9" >4000 1 3905 Tubing Fitting 1000 3910 Duct 24" 1000 1 3920 Angle 1000 Pres 1 1 1 3930 1000 Vac 1 1 1 2215-36 averaging 36" >2000 FPM Pres 2220-36 Angle Supply 36" >2000 FPM Pres 2230-36 Angle Supply 36" >2000 FPM Pres 2425-36 Duct 36" >2000 FPM 2485-36 Total 36" Pres
Fig 1 Alnor 3002 Set
Fig 2 Alnor 3002 Set
Fig 4 Alnor 3002 Set with Jets numbered.
Fig 5 patents: (see below) 2060848 & 2207747
Rotating Vane (Windmill)
Taylor 3132Taylor Anemometer - three dials: Large: 0 to 100 Feet, small: 0 to 10 Hunderd feet & 0 to 10 Thousand feet. YouTube:
How to use a Taylor anemometer -
Tycos 3132 Biram Anemometer (8 vanes)
3141 single large dial, 8 vanes
Mining Artifacts - Anemometers,
Davis & Sons
UK patent 1876 No. 1128
TB Winter Newcastle Mining anemometer.
"Biram's Patent, Davis Optician Derby" (History of Science Museum, UK)
The dial face of the Taylor 3132 looks identical to the one for the Ship's Log. They work the same way, that's to say they are allowed to run for some fixed time and the total run is divided by the time to get the speed.
From Taylor 1936 Catalog, pages: 26 & 27
Short & Mason
adds Wind Vane
Short & Mason Pocket Biram's
Short & Mason Low-Reading
Short & Mason High-speed
Short & Mason makes dip needles. Taylor 1936 Catalog, pg 28 -
2974 Short & Mason Inner's Compass, $33.00 5" dia case
2974-1/2 Short & Mason Miner's Compass, $44.00, Norwegian Type 3" dia case.
Short & Mason, Campbell-Stokes Sunshine Recorder, $308.00 Improved style Bronze bowl with _____ for summer, winter and equinox. adjustalbe for latitude from 40 to 70 degrees, optically perfect sphere.
Fig 2 It's not clear what the purpose of the hollow tube is.
It is not an adapter to a standard camera tripod.
If you know what it's used for let me know.
Do not turn lever to "On" position unless fan blades
are in motion. If instrument is not in wind stream,
and motion is desired, blow lightly on fan. Do not
put blades in motion in any other manner.
Spring loaded lever at about 30 on main dial is to zero all dials.
Note wind direction in order to get dials to count up.
The person using the anemometer should stand facing the wind and reading the dials.
Fig 4 The first generation units have the screw seen at the top under the base foot instead of exposed like this one. That means to dissemble one of the old units the base foot needs to be removed.
Note the bottom screw is recessed and would clear the base casting if it was that big.
But . . . . they made a mistake and bored the clearance hole in the basefoot casting in such a way that it removed the part number.
If they would have put the clearance hole on the plain side you could read the part number.
Can measure very slow and high wind speeds and some models work in three dimensions. Tend to be priced over $1,000.
Laser (Wiki)The Campbell Scientific Inc. CA-9 Path-Averaging Laser Anemometer seems to be a pioneer introduced in 1974. I'm trying to figure out how it works.
3966324 Laser doppler anemometer,Paul D. Iten, Brown Boveri AG (Campbell Scientific: CA-9), App: 1973-04-18, 356/28.5; 356/28 -
Acoustic resonance (Wiki)
The NETATMO wind speed/direction sensor may be of this type. It's priced way below the other ultrasonic sensors and does not appear to have the bumps they have for the transducers.
5877416 Anemometer employing standing wave normal to fluid flow and traveling wave normal to standing wave, Savvas Kapartis, FT Tech Ltd, 1999-03-02, -
1050350 Anemometer, Henry Davis, 1913-01-14, 73/861.85; 415/4.3 -
1401877 Flow-meter for gases, Robert H Davis, 1921-12-27, 172/719 - nozzle sends air to paddle attached to meter needle. Not vane in tunnel.
1535421 Anemometer, John E Jones, MSA Safety Inc, 1925-04-28, 73/861.05 -
1560535 Anemometer, Carl O Burton, 1925-11-10, 188/155; 340/601 - spinning cups drive electric generator has output corresponding to the current wind speed.
1684350 Rotary-type flow meter, Hamill William Wilson, 1928-09-11, 73/861.81; 73/254; 73/861.88 - spinning rotor, not vane in tunnel.
1905444 Anemometer, Alfred U Davis, Davis Instr Mfg Co, 1933-04-25, 73/861.85; 73/514.39; 73/524; 310/93 - Cups or rotating vanes, uses spinning fan as part of mechanism to display speed instead of dials for run.
eBay listing: Post WW2 Casella hand held anemometer
There's another speed indicating anemometer where the readout looks like an electrical panel meter (probably is and the cope drive a generator).
AN/PMQ-3A Airflow Inst Co. - the spinners may have a 1/4" phone plug as the attachment.
1967449 Hand wind gauge, Ostman Carl Johan, 1934-07-24, 73/861.85 - spinning vane with rotation counter. Sort of a windmill. Can zero counter using the hand holding the gauge keeping the other hand free to work the watch.
2060848 Air velocity meter, John R Boyle, Illinois Testing Laboratories, 1936-11-17, 73/202; 73/861.76; 138/DIG.4 - purely mechanical, Single port with two tubes. Vane (35) in tunnel above meter pivot.
RE21127 Air velocity meter, John R Boyle, Illinois Testing Laboratories, 1939-06-27, 73/202 - 2060848
There must have been at least one law suit over this patent in order for it to be reissued.
2207747 Velocity meter, Joseph A Manarik, Kenneth H Miller, Illinois Testing Laboratories,App: 1936-11-11, Pub: 1940-07-16, 73/202; 73/861.76; 73/187 -
The Push To Read button (63) keeps the needle locked and also has a hold measurement function.
Jets (probes) are covered in this patent. The word "jet" in the 1930s may not have been common.
Note it's not at all clear how to connect the tubing to the meter.
Note the word "Velocity" implies speed and direction. These instruments only measure speed so that would be a more appropriate word in the title.
2315185 Air velocity meter, John R Boyle, Illinois Testing Laboratories,1943-03-30,73/202; 73/430; 73/861.76; 123/198F - purely mechanical with hose fittings on either side of meter for external probes. Vane in tunnel above meter pivot.
A number of the Alnor (Illinois Testing Laboratories) sets on eBay have Boyle in the title.
2316255 Anemometer, Knobel Max, Packard Robert Henry, GMC, 1943-04-13, 73/861.75 - to operate at < 5 feet/minute (inside refrigerators), remote reading
2342290 Jet for air velocity meters and the like, Kenneth H Miller, Illinois Testing Laboratories, 1944-02-22, 73/202; 73/861.65 - I'd call it a probe.
2346864 Anemometer, Packard Robert Henry, 1944-04-18, 73/861.85; 250/232; 250/237R; 324/175; 416/5; 416/241R -
2608859 Propeller anemometer, Harcourt C Sontag, Cordero Fidel, Samuel H J Womack, 1952-09-02, 73/170.07; 33/402 -
2612780 Resistance thermometer, Bruyne Emil A De, Illinois Testing Laboratories, 1952-10-07, 374/183; 374/144 - cal plugs for 0 - 100F, 100 - 200F & 200 - 300F. linear wire sensor.
2690671 Air velocity meter, John A Obermaier, Alfred A Obermaier, Alnor Inst Co, 1954-10-05, 73/861.76; 73/431; 220/664 - purely mechanical with port on left and right sides. This is the Velometer Jr.
2690671 Air velocity meter, John A Obermaier, Alfred A Obermaier, Alnor Inst Co, 1954-10-05, 73/861.76; 73/431; 220/664 - purely mechanical with port on left and right sides.
This is the Velometer Jr.
Works in any orientation.
There's a claim of easy glass removal & replacement. How?
2779194 Wind-gauge working on the pressure principle, Slettenmark Karl Ivar Gustav, 1957-01-29, 73/861.57 -
2838932 Anemometer, James G Dwyer, DWYER Manuf,1958-06-17, 73/170.16; 73/170.07; 73/170.14 - (Official web page) - Pitot tube remote reading
2849880 Thermal anemometers, Alfred A Obermaier, Illinois Testing Laboratories, 1958-09-02, 73/204.24 - Hot-wire Anemometer (Wiki)- mentioned thermocouple, not thermister.
2889707 Anemometer, Walter J Snider, 1959-06-09, 73/861.76; 73/170.15 - wind direct against vane with spring so reads out in MPH/KPH
2923152 5-prong aerodynamic pickup, Jr George C Mabry, Andrew A Mahoff, Charles E Pettingall, Douglas Aircraft, 1960-02-02, - angle of attack, angle of sideslip and indicated airspeed.
2993374 Air meter, Frank W Dwyer, Locke John, DWYER Manuf, 1961-07-25, 73/861.55 - pith ball floats in tube to indicate wind speed.
3242730 Air velocity meters, Veikko K Peltola, Illinois Testing Laboratories (Alnor), 1966-03-29, 73/861.76 - internal 1.35 V Mercury battery (obsolete) used for damping, has left and right ports for attachments.
3463003 Air velocity measuring apparatus, Martin J Pierman, Edwin W Donath, Otto A Ernst, Illinois Testing Laboratories (Alnor), 1969-08-26, 73/861.75; 73/861.76 - taught band meter movement spring balanced vane (plate) in tunnel all in one assembly that can be adjusted and tested prior to assembly into meter. No batteries.
3557617 Vane anemometers, Alexander Connor Wilson, Peter Edward Bagley, Airflow Developments Ltd, 1971-01-26, 73/861.85 - hand held rotating vane with Veeder-Root distance register
3636766 Velocity meter, Philip R Austin, Contamination Control Lab, 1972-01-25, 73/861.75 - pretty much like a door with the hinge at the top, very simple to make from sheet metal.
3638488 Fluid velocity measuring device and method, Robert S Meijer, Alnor Instruments, 1972-02-01, - modulation (audio?) and phase measurement.
3719082 Air velocity measuring system, A Obermaier, M Pierman, Alnor Inst Co, 1973-03-06, 73/202 - adds range switch to purely mechanical system between probe and meter. Has the look of an Acetylene welder mixing handle (Wiki).
3769835 Pitot calibrated air velocity measuring system with transducer, A Obermaier, M Pierman, Alnor Inst Co, 1973-11-06, 73/202 - range switch between sensor and vane in tunnel meter
3826136 Anemometer device, N Chang, 1974-07-30, 73/861.85; 73/861.75; 73/170.15 -
3823611 Vane anemometers, M Rudow, W Klawans, Davis Inst Co, 1974-07-16, 73/861.85 - works down to 30 feet/minute. Note that the Kestrel 5500FW can operate down to 2 feet/minute.
4051725 Hand-held anemometer, Alden Schloss, 1977-10-04, 73/861.76; 267/179 - wind direct acting on vane, no tunnel.
4102188 Portable anemometer with collapsible rotors, R. A. Simerl, Simerl Instruments, 1978-07-25, 73/170.01; 73/861.85 -
Related:4154101 Air velocity gauge, Steven O. Buchanan, Robert W. Butts, Dwyer Instruments Inc, 1979-05-15 73/861.75; 73/272R - Vane in tunnel, 20 - 400 FPM,
DE2824771A1 Portable anemometer with light weight rotor cups - has cup support arms pivotally connected to spindle and collapsible from active horizontal to vertical storage position, R A Simerl, 1979-12-13, -
D244203 Anemometer generator frame, R. A. Simerl, 1977-05-03, D10/103; D10/52; D10/96 -
D245970 Anemometer transducer, R. A. Simerl, 1977-10-04, - Savonius (Wiki) instead of cups. Cylindrical case.
Calls:GB1559761 Anemometers, 1980-01-23
2648980 Apparatus for measuring and recording the direction and velocity of wind, Louvan E Wood, Vernon D Hauck, Bendix Aviation, 1953-08-18, 73/170.07 - molded to look like a plane, propeller for speed, tail for direction. Maybe the "Aerovane" stype?
3465584 Anemometer with braking mechanism, Robert E Turner, Dennis W Camp, NASA, 1969-09-09, 73/861.8- testing in order to measure the time for cups to come up to speed
3623362 Free-fall current meter, Robert Daniel Gerard, Navy, 1971-11-30, 73/170.14; 73/170.34 - sinks to bottom and returns to surface of ocean while recording water currents.
3904984 Oram - type in number
D237951 Anemometer, R. A. Simerl, 1975-12-05, - Savonius see D245970 above. Rectangular case with normal meter movement. Looks like Sims Anemometer on eBay.
FR2514143A1/en Hand-held electronic anemometer - has Hall sensor coupling rotating shaft to electronic circuit giving adapted scale read-out to LCD
D244226 Combined top sender and bearing plate for an anemometer, R. A. Simerl, 1977-05-03, D15/199 -
D247879 Anemometer transducer, R. A. Simerl, 1978-05-16, D10/96; D10/60 -
D215071 Anemometer integral cup and arm, David M. Davis, 1969-08-26,
Calls:D237951 Anemometer, R. A. Simerl,
3020963 Cup anemometer, Hakkarinen William, 1962-02-13, 416/196R; 416/196A; 416/197A; 416/197R; D10/96 - strong enough for hurricane
3020963 see above
3713336 Combination fluid flow speed and direction transducer, T Bernstein, J Miller, 1973-01-30, 73/170.11; 73/170.08; 73/170.12; 33/351; 33/362 - direction relative to magnetic North.
4248082 Anemometer, D. Eugene Farmer, 1981-02-03, 73/861.85; 73/861.78 - classic Taylor type windmill vane type but with LCD readout. magnets turn in coil.
Calls:4841782 Target fluid flow indicator gauge, Steven O. Buchanan, Dwyer Instruments Inc, 1989-06-27, 73/861.74; 73/DIG.5 - Magnehelic?
3777121 Electronic Counter
3777263 Peak holding circuit
3805161 Apparatus for sensing speed - magnets and coils
3916326 Sensing circuit including polarity discriminator
3970935 Wide-range digital reluctance tachometer
Patents for Dwyer Magnehelic:6564652 X-wire probe for velocity measurements near the downstream edge of an aperture, Paul J. Zoccola, Jr., US Navy, 2003-05-20, 73/861.85 -
3373614 Differential pressure gauge, Robert D Neyer, Yarway Corp, 1968-03-19, 73/716; 116/268 - magnetic coupling from pressure vessel to outside
3397319 Differential pressure indicator and switch, John P Locke, Dwyer Mfg, 1968-08-13, 250/231.19 -
3645140 Pressure gauge, James W Phillips, Richard S Zoludow, Dwyer Instruments Inc, 1972-02-29, 73/716 -
3862416 Pressure indicator and switch, James W Phillips, Richard S Zoludow, Dwyer Instruments Inc, 1975-01-21, 250/231.11; 250/231.19 -
4011759 Differential pressure gauge, James W. Phillips, Terrence J. Troyer, Dwyer Instruments Inc, 1977-03-15, 73/716; 73/DIG.5; 116/267-
4030365 Differential pressure gauge, James W. Phillips, Terrance J. Troyer, Dwyer Instruments Inc, 1977-06-21, 73/708 -
4890497 Differential pressure gauge transmitter, John M. Cahill, Dwyer Instruments Inc, 1990-01-02, 73/708; 338/4; 73/721; 73/766 -
4347744 Diaphragm type differential pressure gauge with overpressure relief protection, Steven O. Buchanan, Dwyer Instruments Inc, 1982-09-07, 73/715; 137/68.27; 137/71; 73/431; 73/716; 73/738 -
5012678 Overpressure relief safety plug for pressure gauges, Steven O. Buchanan, Dwyer Instruments Inc,1991-05-07, 73/738; 73/431; 73/756 -
An Instantaneous Direct-reading Radiogoniometer by Robert Watson-Watt, 1926
StormScope - lightening detection
SkyScan Severe Thunderstorm Detector
3753117 Severe weather warning device, Downing G, Mcewen T, Weather Watch Corp, Aug 14, 1973, 73/170.24, 340/515, 324/72, 340/601, 340/693.1 - distance not direction
4023408 Stormscope, Paul A. Ryan, Nicholas Spitzer, May 17, 1977, 73/170.24, 324/72 - aircraft instrument WX-7 was the first in a series.
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page created 30 Jan. 2000.