GB781881A - Improvements in and relating to pull-wire signalling systems - Google Patents

Improvements in and relating to pull-wire signalling systems

Info

Publication number
GB781881A
GB781881A GB2986754A GB2986754A GB781881A GB 781881 A GB781881 A GB 781881A GB 2986754 A GB2986754 A GB 2986754A GB 2986754 A GB2986754 A GB 2986754A GB 781881 A GB781881 A GB 781881A
Authority
GB
United Kingdom
Prior art keywords
wire
pull
relating
bell
signalling systems
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
GB2986754A
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.)
WILFRID BRUCE DAVIS
John Davis and Son Derby Ltd
Original Assignee
WILFRID BRUCE DAVIS
John Davis and Son Derby 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
Application filed by WILFRID BRUCE DAVIS, John Davis and Son Derby Ltd filed Critical WILFRID BRUCE DAVIS
Priority to GB2986754A priority Critical patent/GB781881A/en
Publication of GB781881A publication Critical patent/GB781881A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables
    • B66B7/064—Power supply or signal cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B19/00—Mining-hoist operation
    • B66B19/06—Applications of signalling devices

Landscapes

  • Gas-Insulated Switchgears (AREA)

Abstract

781,881. Mine haulage signalling apparatus. DAVIS & SON DERBY, Ltd., J., and DAVIS, W. B. Oct. 18, 1955 [Oct. 18, 1954], Class 78 (5). A signalling apparatus for mine haulage comprises a manually-operated pull-wire W which, in addition to actuating a lever D to operate bell E, also carries an electric current, whereby the bell rings in the event of the wire breaking. Thus, current from transformer T passes through switch C, wire W and relays R1, R2. Switch C is opened both by a pull on wire W and by accidental breaking of wire W so that relays R1, R2 are released to stop the haulage motor and to operate bell E.
GB2986754A 1954-10-18 1954-10-18 Improvements in and relating to pull-wire signalling systems Expired GB781881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2986754A GB781881A (en) 1954-10-18 1954-10-18 Improvements in and relating to pull-wire signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2986754A GB781881A (en) 1954-10-18 1954-10-18 Improvements in and relating to pull-wire signalling systems

Publications (1)

Publication Number Publication Date
GB781881A true GB781881A (en) 1957-08-28

Family

ID=10298473

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2986754A Expired GB781881A (en) 1954-10-18 1954-10-18 Improvements in and relating to pull-wire signalling systems

Country Status (1)

Country Link
GB (1) GB781881A (en)

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