GB586182A - Improvements in or relating to remote controlled selecting arrangements - Google Patents

Improvements in or relating to remote controlled selecting arrangements

Info

Publication number
GB586182A
GB586182A GB23605/44A GB2360544A GB586182A GB 586182 A GB586182 A GB 586182A GB 23605/44 A GB23605/44 A GB 23605/44A GB 2360544 A GB2360544 A GB 2360544A GB 586182 A GB586182 A GB 586182A
Authority
GB
United Kingdom
Prior art keywords
pulses
relay
contacts
energizing
transmission
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB23605/44A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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.)
Filing date
Publication date
Priority to BE257259D priority Critical patent/BE257259A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB23605/44A priority patent/GB586182A/en
Priority to ES175952A priority patent/ES175952A1/en
Publication of GB586182A publication Critical patent/GB586182A/en
Priority to CH555568A priority patent/CH472663A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/028—Selective call decoders using pulse address codes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/288—X-rays; Gamma rays or other forms of ionising radiation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/05—Investigating materials by wave or particle radiation by diffraction, scatter or reflection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/10—Different kinds of radiation or particles
    • G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
    • G01N2223/1013—Different kinds of radiation or particles electromagnetic radiation gamma
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/20—Sources of radiation
    • G01N2223/202—Sources of radiation isotopes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/30—Accessories, mechanical or electrical features
    • G01N2223/322—Accessories, mechanical or electrical features immerged detecting head
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/60—Specific applications or type of materials
    • G01N2223/635—Specific applications or type of materials fluids, granulates

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)

Abstract

586,182. Wireless signalling. STANDARD TELEPHONES & CABLES, Ltd., and RATTUE, E. A. Nov. 27, 1944, No. 23605. [Class 40 (v)] In a wireless communication system comprising a transmitting station and a number of receiving stations, selection of any one receiving station is made in response to the transmission of signals comprising trains of pulses alternately of two different carrier frequencies and which are keyed in a manner characteristic of the station to be selected. The transmitter oscillator 2 operates on one of two adjacent frequencies (e.g. 2.002 and 2.004 Mcs. /sec.) determined by the piezoelectric crystals 5, 6 connected to the opposite contacts 11, 12 of the relay contact assembly 8. Operation of the dialling means 10, interrupting the energizing circuit of the relay 9, causes a predetermined number of reversals of the contacts 8, and the transmission of a corresponding series of R.F. pulses, alternate pulses being of the alternative carrier frequencies. In the receiver, the amplified R.F. pulses are passed to a mixing valve 16 whose oscillator section operates at a third adjacent frequency (e.g. 2.000 Mcs./sec.) determined by the piezoelectric crystal 17. The resultant A.F. pulses (i.e. 2 kcs. and 4 kcs.) are separated by means of crystal filters 18, 19 and applied to the control grids of the twin detector valve 20, 21. The rectified D.C. pulses in the anode circuits are applied to the opposing windings 22, 23 of a relay 24, successive pulses thus causing alternate reversals of the relay contacts 25. The resultant energizing of the selector-unit windings 28 causes stepped operation of the ratchetwheel 32. Transmission of the correct digit trains of pulses causes the wheel 32 to be latched after each train, the final position taken up completing the circuit 33 and energizing the relay 34. Energization of the relay 34 closes the locking contacts 35 and also closes contacts 36 to ring the alarm bell 37. An interrupter key 38 may be provided for release of the locking circuit, and known means may be employed for returning the selector mechanism 32 to normal.
GB23605/44A 1944-11-27 1944-11-27 Improvements in or relating to remote controlled selecting arrangements Expired GB586182A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE257259D BE257259A (en) 1944-11-27
GB23605/44A GB586182A (en) 1944-11-27 1944-11-27 Improvements in or relating to remote controlled selecting arrangements
ES175952A ES175952A1 (en) 1944-11-27 1946-11-29 IMPROVEMENTS IN OR RELATIVE TO DISTANCE CONTROLLED SELECTING DEVICES
CH555568A CH472663A (en) 1944-11-27 1968-04-16 Radiation meter for measuring the quantity of a material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB23605/44A GB586182A (en) 1944-11-27 1944-11-27 Improvements in or relating to remote controlled selecting arrangements
US63396667A 1967-04-26 1967-04-26

Publications (1)

Publication Number Publication Date
GB586182A true GB586182A (en) 1947-03-10

Family

ID=26256617

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23605/44A Expired GB586182A (en) 1944-11-27 1944-11-27 Improvements in or relating to remote controlled selecting arrangements

Country Status (2)

Country Link
CH (1) CH472663A (en)
GB (1) GB586182A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2693526A (en) * 1949-06-15 1954-11-02 Automatic Elect Lab Single channel single frequency mobile radio telephone system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2693526A (en) * 1949-06-15 1954-11-02 Automatic Elect Lab Single channel single frequency mobile radio telephone system

Also Published As

Publication number Publication date
CH472663A (en) 1969-05-15

Similar Documents

Publication Publication Date Title
GB341568A (en) Method of, and means for, maintaining secrecy in the transmission of wireless telegraphic messages
GB663859A (en) Improvements in or relating to selective calling systems
US2881251A (en) Apparatus for time multiplexing speech and short bursts of information
US3335227A (en) Coordination of telephone and remote control transmission over a common communication channel
US2289517A (en) Radio alarm system
GB670703A (en) Improvements in or relating to a selective control system
GB586182A (en) Improvements in or relating to remote controlled selecting arrangements
US2112877A (en) Centralized control
US2438902A (en) Pulse multiplex system employing fixed pulse-time displacement for signaling
US2599904A (en) Multistation selective communication system
US2487513A (en) Radio relaying system
US1688452A (en) Telephone signaling system
US2485580A (en) Signaling system
US1464565A (en) Call system for radiotelephony
US2076361A (en) Crystal oscillator monitor and centralized control
GB611083A (en) Improvements in or relating to intelligence relaying systems
US2503000A (en) Carrier telegraphy
GB673173A (en)
US1896487A (en) Calling circuit
GB359812A (en) Improvements in or relating to multiplex telegraph systems
US1582695A (en) Radio communication system
US1997705A (en) Calling arrangement for radiotelephone circuits
US1425523A (en) Transmission system for radiant energy
US1725032A (en) Secret communicating system
US2094151A (en) Remote control system