GB762944A - Improvements in and relating to indicating mechanisms - Google Patents

Improvements in and relating to indicating mechanisms

Info

Publication number
GB762944A
GB762944A GB1731252A GB1731252A GB762944A GB 762944 A GB762944 A GB 762944A GB 1731252 A GB1731252 A GB 1731252A GB 1731252 A GB1731252 A GB 1731252A GB 762944 A GB762944 A GB 762944A
Authority
GB
United Kingdom
Prior art keywords
electromagnet
permanently magnetized
energization
july
permanently
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
GB1731252A
Inventor
Frederick Emil Rommel
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.)
Telephone Manufacturing Co Ltd
Original Assignee
Telephone Manufacturing 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
Application filed by Telephone Manufacturing Co Ltd filed Critical Telephone Manufacturing Co Ltd
Priority to GB1731252A priority Critical patent/GB762944A/en
Publication of GB762944A publication Critical patent/GB762944A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/64—Arrangements for signalling the number or class of the calling line to the operator

Abstract

762,944. Indicators. TELEPHONE MANUFACTURING CO., Ltd. July 10, 1953 [July 9, 1952], No. 17312/52. Class 40 (1). An indicator comprises a permanently magnetized indicating member arranged for limited rotation between the poles of an electromagnet upon energization thereof, and further means for permanently polarizing the pole pieces so that the indicating member tends to return to one position on de-energization of the electromagnet. As described, the indicator of Specification 685,926 may be modified by using a permanently magnetized core or pole pieces for the electromagnet, or by fitting a permanently magnetized hollow cylindrical slug, e.g. as disclosed in Specification 723,997, [Group XXXVII], over the core. The indication may be effected, alternatively, by attaching a flag to the rotor. Reference has been directed by the Comptroller to Specification 687,604.
GB1731252A 1952-07-09 1952-07-09 Improvements in and relating to indicating mechanisms Expired GB762944A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1731252A GB762944A (en) 1952-07-09 1952-07-09 Improvements in and relating to indicating mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1731252A GB762944A (en) 1952-07-09 1952-07-09 Improvements in and relating to indicating mechanisms

Publications (1)

Publication Number Publication Date
GB762944A true GB762944A (en) 1956-12-05

Family

ID=10092970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1731252A Expired GB762944A (en) 1952-07-09 1952-07-09 Improvements in and relating to indicating mechanisms

Country Status (1)

Country Link
GB (1) GB762944A (en)

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