GB389725A - Improvements in or relating to fire alarm street boxes or like signalling apparatus - Google Patents

Improvements in or relating to fire alarm street boxes or like signalling apparatus

Info

Publication number
GB389725A
GB389725A GB2257532A GB2257532A GB389725A GB 389725 A GB389725 A GB 389725A GB 2257532 A GB2257532 A GB 2257532A GB 2257532 A GB2257532 A GB 2257532A GB 389725 A GB389725 A GB 389725A
Authority
GB
United Kingdom
Prior art keywords
lever
handle
pivoted
latch
fire
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
GB2257532A
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
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2257532A priority Critical patent/GB389725A/en
Publication of GB389725A publication Critical patent/GB389725A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/12—Manually actuated calamity alarm transmitting arrangements emergency non-personal manually actuated alarm, activators, e.g. details of alarm push buttons mounted on an infrastructure

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Special Wing (AREA)

Abstract

389,725. Fire-alarm systems. STANDARD TELEPHONES & CABLES, Ltd. and BATES, E. F., Connaught House, Aldwych, London. Aug. 12, 1932, No. 22575. [Class 40 (i).] The pull handle P of a fire-alarm or like signal box co-operates, through the intermediary of a pivoted lever O carrying a latch T, with a pivoted lever S which is adapted to operate the starting lever F of the signal transmitter. When the handle P is pulled the latch T operates lever S to start the transmitter, but after predetermined movement the latch becomes disengaged from the lever S to allow restoration of the levers F, S to normal after the code signal is sent in the event that the handle P is held operated. Thus the arrangement ensures that a normal code signal is transmitted irrespective of whether the pull handle is allowed to restore immediately after operation or is held operated. The pull handle is associated with a glass plate X. In a modification, the operating handle is pivoted on the door of the box and carries a lever adapted to co-operate with a second pivoted lever associated with the starting lever. The arrangement is such that after a predetermined rotation the first lever becomes disengaged from the second lever to permit restoration of the second lever independently of the handle.
GB2257532A 1932-08-12 1932-08-12 Improvements in or relating to fire alarm street boxes or like signalling apparatus Expired GB389725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2257532A GB389725A (en) 1932-08-12 1932-08-12 Improvements in or relating to fire alarm street boxes or like signalling apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2257532A GB389725A (en) 1932-08-12 1932-08-12 Improvements in or relating to fire alarm street boxes or like signalling apparatus

Publications (1)

Publication Number Publication Date
GB389725A true GB389725A (en) 1933-03-23

Family

ID=10181616

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2257532A Expired GB389725A (en) 1932-08-12 1932-08-12 Improvements in or relating to fire alarm street boxes or like signalling apparatus

Country Status (1)

Country Link
GB (1) GB389725A (en)

Similar Documents

Publication Publication Date Title
GB389725A (en) Improvements in or relating to fire alarm street boxes or like signalling apparatus
GB1165417A (en) Alarm System
GB636272A (en) Improvements in or relating to fire alarm equipment
GB1126626A (en) Electronic keyboard
GB510612A (en) Improvements in or relating to electrical signalling systems
US1772422A (en) Bank-vault alarm system
US1505326A (en) Phonetic burglar and other alarm
GB249401A (en) Improvements in or relating to fire alarm devices
US2152535A (en) Alarm system
GB543616A (en) Improvements in or relating to telegraph transmitting apparatus
GB477334A (en) Improvements relating to block signalling systems for railways and the like
US2783462A (en) Electrical protective burglar alarm system
US2250054A (en) Dispatching mechanism for alarm signal systems
US416513A (en) Fire-alarm system
US540422A (en) Signal-transmitting apparatus and system
US2533344A (en) Variable signal transmitting station
GB209015A (en) Improvements in street boxes for fire alarm and like systems
DE409836C (en) Signaling device with optical and acoustic sign triggering, the optical triggering of which is initially made invisible and only then made visible
GB386345A (en) Improvements in electric burglar alarms and the like
GB381530A (en) Improvements in or relating to burglar and like alarms
GB375782A (en) Improvements in and relating to telegraphic installations
GB423155A (en) Improvements in keyboard impulse transmitters for use in teleprinting systems
GB781881A (en) Improvements in and relating to pull-wire signalling systems
GB403024A (en) Improvements in or relating to automatic burglar and like alarms
GB275128A (en) Improvements in burglar alarm apparatus