GB536122A - Improvements relating to electrical signalling apparatus - Google Patents

Improvements relating to electrical signalling apparatus

Info

Publication number
GB536122A
GB536122A GB289840A GB289840A GB536122A GB 536122 A GB536122 A GB 536122A GB 289840 A GB289840 A GB 289840A GB 289840 A GB289840 A GB 289840A GB 536122 A GB536122 A GB 536122A
Authority
GB
United Kingdom
Prior art keywords
contacts
arrangement
relays
liquid
level
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
GB289840A
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.)
GENT AND Co Ltd
Original Assignee
GENT AND Co Ltd
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 GB990437A priority Critical patent/GB493202A/en
Application filed by GENT AND Co Ltd filed Critical GENT AND Co Ltd
Priority to GB289840A priority patent/GB536122A/en
Publication of GB536122A publication Critical patent/GB536122A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/002—Telephonic communication systems specially adapted for combination with other electrical systems with telemetering systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/02—Compensating or correcting for variations in pressure, density or temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Measuring Volume Flow (AREA)

Abstract

536,122. Electric signalling systems. GENT & CO., Ltd., and REMINGTON, C. Feb. 15, 1940, No. 2898. Addition to 493,203. [Class 40 (i)] [Also in Group XXXIX] The system of the parent Specification wherein liquid-level indications are transmitted as audible signals over a telephone line is modified by making the signalling circuits dependent on contacts closed by the liquid at predetermined levels. As in the prior arrangement, when an enquiry call is made, a vibrating relay causes the handset to be lifted and maintains the circuits in signalling condition for a given time. In one arrangement, Fig. 1 (not shown), a pair of relays are controlled respectively by high level and low level contacts, each of which may comprise two strips of stainless steel clamped to an insulator. Different signals, for example, continuous buzzer, intermittent buzzer, bell, are connected up according as the liquid level is below the lower contacts, above the.lower but below the higher contacts or above the higher contacts. In a second arrangement, Fig. 2, four contacts E1-4 at various levels are connected to corresponding sluggish relays A1-4 which are arranged to energize and subsequently release in sequence, and a pair of bells B1, 2 are given an impulse alternately as each relay releases, so that the enquirer hears a number of strokes equal to the number of contacts submerged. The cycle of operations is repeated after a delay imposed by the energization and release of two sluggish relays R1, 2 aslong as the vibrating relay 6 continues to operate.
GB289840A 1940-02-15 1940-02-15 Improvements relating to electrical signalling apparatus Expired GB536122A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB990437A GB493202A (en) 1940-02-15 1937-04-07 Improvements in or relating to fluid flow meters
GB289840A GB536122A (en) 1940-02-15 1940-02-15 Improvements relating to electrical signalling apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB289840A GB536122A (en) 1940-02-15 1940-02-15 Improvements relating to electrical signalling apparatus

Publications (1)

Publication Number Publication Date
GB536122A true GB536122A (en) 1941-05-02

Family

ID=9748096

Family Applications (2)

Application Number Title Priority Date Filing Date
GB990437A Expired GB493202A (en) 1940-02-15 1937-04-07 Improvements in or relating to fluid flow meters
GB289840A Expired GB536122A (en) 1940-02-15 1940-02-15 Improvements relating to electrical signalling apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB990437A Expired GB493202A (en) 1940-02-15 1937-04-07 Improvements in or relating to fluid flow meters

Country Status (1)

Country Link
GB (2) GB493202A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144303A (en) * 1983-07-22 1985-02-27 Remote Interrogations Pty Ltd Interrogation device
FR2569922A1 (en) * 1984-08-31 1986-03-07 Univ Clermont Ferrand Ii Selective control device for automatically making and stopping a telemonitoring telephone call

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438934A (en) * 1941-01-17 1948-04-06 Rockwell Mfg Co Temperature compensated meter
US2438935A (en) * 1943-06-28 1948-04-06 Rockwell Mfg Co Temperature compensated meter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144303A (en) * 1983-07-22 1985-02-27 Remote Interrogations Pty Ltd Interrogation device
FR2569922A1 (en) * 1984-08-31 1986-03-07 Univ Clermont Ferrand Ii Selective control device for automatically making and stopping a telemonitoring telephone call

Also Published As

Publication number Publication date
GB493202A (en) 1938-10-05

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