GB1437922A - Air monitoring apparatus - Google Patents

Air monitoring apparatus

Info

Publication number
GB1437922A
GB1437922A GB2634474A GB2634474A GB1437922A GB 1437922 A GB1437922 A GB 1437922A GB 2634474 A GB2634474 A GB 2634474A GB 2634474 A GB2634474 A GB 2634474A GB 1437922 A GB1437922 A GB 1437922A
Authority
GB
United Kingdom
Prior art keywords
relay
contacts
motor
current
indicator
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
GB2634474A
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.)
Elster Kromschroeder GmbH
Original Assignee
G Kromschroeder AG
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
Application filed by G Kromschroeder AG filed Critical G Kromschroeder AG
Publication of GB1437922A publication Critical patent/GB1437922A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/08—Regulating air supply or draught by power-assisted systems
    • F23N3/085—Regulating air supply or draught by power-assisted systems using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

1437922 Air supply indicators G KROMSCHRODER AG 13 June 1974 [2 Aug 1973] 26344/74 Heading F4B [Also in Division H2] Apparatus for monitoring the supply of air to a furnace wherein the air is supplied by a blower 2 driven by a motor 1 comprises a first relay 8 having normally open contacts 12 in series with a second relay 10 having normally closed contacts 13 in series with the motor 1, these contacts being in an indicator circuit 11, the relay 8 being arranged to operate at the nominal working current of motor 1 and relay 10 being arranged to operate at a predetermined value between this nominal working current and the starting current of the motor. This predetermined value is nearer the nominal working current than the starting current. In operation when the motor is switched on high starting current flows through relays 8 and 10 and relay 8 closes its contacts 12 and relay 10 opens its contacts 13 so that the indicator remains unoperated, but when the motor speeds up and its current drops to the nominal working value the contacts 12 remain closed but relay 10 now operates at the predetermined value and closes its contacts 13 to operate the indicator. If a fault is present and the motor does not reach its nominal speed the indicator remains unoperated due to contacts 13 remaining open. Instead of two separate relays, a relay with two armatures may be used, Fig. 4, not shown, when an additional winding to compensate for current fluctuations may be present.
GB2634474A 1973-08-02 1974-06-13 Air monitoring apparatus Expired GB1437922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2339159A DE2339159A1 (en) 1973-08-02 1973-08-02 DEVICE FOR MONITORING THE AIR SUPPLY WITH GAS FIRED FIREPLACES

Publications (1)

Publication Number Publication Date
GB1437922A true GB1437922A (en) 1976-06-03

Family

ID=5888682

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2634474A Expired GB1437922A (en) 1973-08-02 1974-06-13 Air monitoring apparatus

Country Status (5)

Country Link
DE (1) DE2339159A1 (en)
FR (1) FR2239649B3 (en)
GB (1) GB1437922A (en)
IT (1) IT1012779B (en)
NL (1) NL7407376A (en)

Also Published As

Publication number Publication date
FR2239649B3 (en) 1977-04-08
NL7407376A (en) 1975-02-04
IT1012779B (en) 1977-03-10
FR2239649A1 (en) 1975-02-28
DE2339159A1 (en) 1975-02-27

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee