NL138983B - FOUR-WAY VALVE FOR HEAT EXCHANGE ELEMENTS OF HOT WATER HEATING DEVICES. - Google Patents

FOUR-WAY VALVE FOR HEAT EXCHANGE ELEMENTS OF HOT WATER HEATING DEVICES.

Info

Publication number
NL138983B
NL138983B NL62286853A NL138983DA NL138983B NL 138983 B NL138983 B NL 138983B NL 62286853 A NL62286853 A NL 62286853A NL 138983D A NL138983D A NL 138983DA NL 138983 B NL138983 B NL 138983B
Authority
NL
Netherlands
Prior art keywords
hot water
heat exchange
way valve
water heating
heating devices
Prior art date
Application number
NL62286853A
Other languages
Dutch (nl)
Original Assignee
Wobig Alberto
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of NL138983B publication Critical patent/NL138983B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/34—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being vacuum tube
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
NL62286853A 1947-03-01 FOUR-WAY VALVE FOR HEAT EXCHANGE ELEMENTS OF HOT WATER HEATING DEVICES. NL138983B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH909582X 1947-03-01

Publications (1)

Publication Number Publication Date
NL138983B true NL138983B (en)

Family

ID=4547145

Family Applications (3)

Application Number Title Priority Date Filing Date
NL62286853A NL138983B (en) 1947-03-01 FOUR-WAY VALVE FOR HEAT EXCHANGE ELEMENTS OF HOT WATER HEATING DEVICES.
NL66254D NL66254C (en) 1947-03-01
NL75095D NL75095C (en) 1947-03-01

Family Applications After (2)

Application Number Title Priority Date Filing Date
NL66254D NL66254C (en) 1947-03-01
NL75095D NL75095C (en) 1947-03-01

Country Status (5)

Country Link
BE (1) BE480829A (en)
CH (1) CH258470A (en)
DE (1) DE909582C (en)
FR (1) FR962237A (en)
NL (3) NL75095C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816227A (en) * 1953-11-04 1957-12-10 Hahnel Alwin Frequency multiplier
DE962271C (en) * 1954-11-12 1957-04-18 Lorenz C Ag Circuit arrangement for frequency modulation
US2867725A (en) * 1956-02-20 1959-01-06 Patronix Inc Electronic oscillator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR725780A (en) * 1931-01-10 1932-05-18 Radio Electr Soc Fr Improvements to Reaction Devices Using Multiple Electrode Lamps and Applications
DE717698C (en) * 1937-03-02 1942-02-20 Telefunken Gmbh Arrangement for influencing the frequency of a tube oscillator by means of regulated wattless feedback
US2298436A (en) * 1940-06-05 1942-10-13 Rca Corp Frequency modulation
NL106866B (en) * 1942-07-11

Also Published As

Publication number Publication date
CH258470A (en) 1948-11-30
DE909582C (en) 1954-04-22
NL66254C (en)
NL75095C (en)
BE480829A (en)
FR962237A (en) 1950-06-07

Similar Documents

Publication Publication Date Title
NL138783B (en) HOT WATER KETTLE.
NL138983B (en) FOUR-WAY VALVE FOR HEAT EXCHANGE ELEMENTS OF HOT WATER HEATING DEVICES.
CH270952A (en) Heat exchanger.
CH269307A (en) Heat exchange device.
DK73523C (en) Grid-shaped heat exchange device.
FR967389A (en) heat exchanger
DK73461C (en) Pipes for heat exchangers.
FR976254A (en) Hot water central heating boiler
DK70087C (en) Hot water boiler for gas or oil heating.
FR954000A (en) Heating stove
DK70052C (en) Element boiler for water heating.
CA441140A (en) Furnace hot water heater
DK71085C (en) Hot water boiler.
CH253431A (en) Kettle for hot water.
ES12794Y (en) Expansion tanks-vessels for hot water heating installations.
FR954452A (en) Heating radiator
FR949170A (en) Heating radiator
CH272072A (en) Heat exchange apparatus.
AT169658B (en) Boilers for hot water heating
CA438147A (en) Hot water heater
FR949454A (en) heat exchanger for fluids
FR970720A (en) Heating boiler
FR975445A (en) heat exchanger
DK73744C (en) Heat meter for hot water pipes.
DK75572C (en) Plate for plate heat exchangers or similar appliances.