GB311686A - Improvements in or relating to automatic switches for telephone systems - Google Patents

Improvements in or relating to automatic switches for telephone systems

Info

Publication number
GB311686A
GB311686A GB469528A GB469528A GB311686A GB 311686 A GB311686 A GB 311686A GB 469528 A GB469528 A GB 469528A GB 469528 A GB469528 A GB 469528A GB 311686 A GB311686 A GB 311686A
Authority
GB
United Kingdom
Prior art keywords
wiper
adjustable
pawl
stops
armature
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
GB469528A
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 GB469528A priority Critical patent/GB311686A/en
Publication of GB311686A publication Critical patent/GB311686A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/02—Multi-position wiper switches
    • H01H67/04—Multi-position wiper switches having wipers movable only in one direction for purpose of selection
    • H01H67/06—Rotary switches, i.e. having angularly movable wipers

Landscapes

  • Telephone Set Structure (AREA)

Abstract

311,686. Standard Telephones & Cables, Ltd., and Snell, M. S. Feb. 14, 1928. Automatic exchange selectors. - Relates to single motion rotary switches and consists in (1) means for adjusting the tension springs of the armature of the magnets, (2) a method of mounting, and adjustable stops for, the driving pawl, (3) adjustable stops for the wiper shaft, and (4) means for adjusting the return spring. The tension springs E, F are adjustable along notches on the tails E<1>, F<1> of the armatures of the magnets 3, 4. The pawl H of the armature 5 of the driving magnet is mounted on a shouldered bolt H<1>, Fig. 4, of stainless steel, the head of the bolt being free in one side of the forked end of the armature so that the bearing space of the pawl is determined by the shouldered bolt and not by the width of the fork. The stops B, C for the pawl are eccentrically mounted as shown in Fig. 5, the seatings for the stops being of conical form. In the normal position, an arm L on the wiper shaft engages an eccentric D which may be adjusted not only to centre the wiper but to provide two normal positions, one with the wiper on the first terminals and the other with the wipers out of the bank. An adjustable stop G prevents the wiper being stepped forwardly off the bank. The wiper pivot M, Fig. 2, is of stanless steel and is screwed at one end into the switch base, the spring box A being mounted at its free end. The box is adjustable around the pivot M and is secured thereto by screws D. 'The stop arm L is carried in a slot in the ratchet wheel K.
GB469528A 1928-02-14 1928-02-14 Improvements in or relating to automatic switches for telephone systems Expired GB311686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB469528A GB311686A (en) 1928-02-14 1928-02-14 Improvements in or relating to automatic switches for telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB469528A GB311686A (en) 1928-02-14 1928-02-14 Improvements in or relating to automatic switches for telephone systems

Publications (1)

Publication Number Publication Date
GB311686A true GB311686A (en) 1929-05-14

Family

ID=9782050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB469528A Expired GB311686A (en) 1928-02-14 1928-02-14 Improvements in or relating to automatic switches for telephone systems

Country Status (1)

Country Link
GB (1) GB311686A (en)

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