GB1020449A - Improvements in and relating to alarm annunciator systems - Google Patents

Improvements in and relating to alarm annunciator systems

Info

Publication number
GB1020449A
GB1020449A GB2406462A GB2406462A GB1020449A GB 1020449 A GB1020449 A GB 1020449A GB 2406462 A GB2406462 A GB 2406462A GB 2406462 A GB2406462 A GB 2406462A GB 1020449 A GB1020449 A GB 1020449A
Authority
GB
United Kingdom
Prior art keywords
scr1
scr2
supply
circuit
alarm
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
GB2406462A
Inventor
Kenneth Hogg
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.)
CA Parsons and Co Ltd
Original Assignee
CA Parsons 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 US144531A priority Critical patent/US3227578A/en
Application filed by CA Parsons and Co Ltd filed Critical CA Parsons and Co Ltd
Priority to GB2406462A priority patent/GB1020449A/en
Priority to GB2594462A priority patent/GB1020450A/en
Publication of GB1020449A publication Critical patent/GB1020449A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/11—Halides
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D87/00—Loaders for hay or like field crops
    • A01D87/12—Loaders for sheaves, stacks or bales
    • A01D87/126—Loaders for stacks or groups of bales
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/07—Nitrogen-containing compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/09—Sulfur-containing compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/14—Paper having stable form or dimension; Curl-resistant paper
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Fire Alarms (AREA)
  • Agricultural Machines (AREA)

Abstract

1,020,449. Visual and audible signalling. C. A. PARSONS & CO. Ltd. May 13, 1963 [June 22, 1962], No. 24064/62. Heading G4F. [Also in Division H3] An alarm communicator comprises a first circuit having a first semi-conductor four-layer device SCR1 connected to a first pulsed D.C. supply A; a second circuit having a second semi-conductor four-layer device SCR2 connected to a second, complementary, pulsed D.C. supply B; means IC, for triggering the first device SCR1 in response to a fault condition; means AC for triggering the second device SCR2 in response to the acknowledgment of a fault; means (diode D4, resistor R4) connecting the device SCR1 to device SCR2 to provide a maintaining current for SCR2 through SCR1; means for maintaining the first device, SCR1, conductive; and a warning circuit connected to both the first and second circuits. In a first embodiment, Fig. 1, closure of alarm contacts IC connect the trigger electrode of a silicon controlled rectifier SCR1 to a positive potential to switch it on. The rectifier is then maintained conductive by the D.C. supply through R2 even if the fault clears, and the pulsed supply on line A causes alarm lamp L to flash. To acknorledge the alarm, an operator closes contacts AC to fire silicon controlled rectifier SCR2 which is then held conductive by the current through SCR1, diode D4 and resistor R4. Line B then supplies a second pulsed supply to lamp L in antiphase with the first so that the lamp is lit steadily. Further visible and/or audible alarms may be connected to point T. The circuit may be modified to respond to persistent fault conditions only by removal of link P1 so that rectifier SCR1 will only be held conductive as long as the fault condition persists. In an alternative circuit, Fig. 2 (not shown) the SCR's are replaced by PNPN diodes and the triggering circuits are modified to cause the negative potential on the cathodes of the diodes to be increased.
GB2406462A 1961-10-12 1962-06-22 Improvements in and relating to alarm annunciator systems Expired GB1020449A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US144531A US3227578A (en) 1961-10-12 1961-10-12 Additives to reduce curl in paper
GB2406462A GB1020449A (en) 1962-06-22 1962-06-22 Improvements in and relating to alarm annunciator systems
GB2594462A GB1020450A (en) 1962-06-22 1962-07-06 A new or improved loader for agricultural purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2406462A GB1020449A (en) 1962-06-22 1962-06-22 Improvements in and relating to alarm annunciator systems

Publications (1)

Publication Number Publication Date
GB1020449A true GB1020449A (en) 1966-02-16

Family

ID=10205792

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2406462A Expired GB1020449A (en) 1961-10-12 1962-06-22 Improvements in and relating to alarm annunciator systems
GB2594462A Expired GB1020450A (en) 1962-06-22 1962-07-06 A new or improved loader for agricultural purposes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2594462A Expired GB1020450A (en) 1962-06-22 1962-07-06 A new or improved loader for agricultural purposes

Country Status (1)

Country Link
GB (2) GB1020449A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51113833A (en) * 1975-03-28 1976-10-07 Yoshitomi Pharmaceut Ind Ltd Process for preparation of 2,6-di-tert-butyl-4-methylphenol
US4069926A (en) * 1975-12-01 1978-01-24 Farmhand (U.K.) Limited Bale collectors
GB2189770A (en) * 1986-04-29 1987-11-04 George Condell Bale handling device
US4911491A (en) * 1987-11-26 1990-03-27 Ford New Holland, Inc. Modular bale handling apparatus with plurality of bale pick-up devices

Also Published As

Publication number Publication date
GB1020450A (en) 1966-02-16

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