GB191007851A - A Device for Sending Current Impulses particularly applicable to Automatic Telephone Systems. - Google Patents

A Device for Sending Current Impulses particularly applicable to Automatic Telephone Systems.

Info

Publication number
GB191007851A
GB191007851A GB191007851DA GB191007851A GB 191007851 A GB191007851 A GB 191007851A GB 191007851D A GB191007851D A GB 191007851DA GB 191007851 A GB191007851 A GB 191007851A
Authority
GB
United Kingdom
Prior art keywords
key
projection
particularly applicable
contact
telephone 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
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.)
TELEPHONWERKE GES MIT BESCHRAE
Original Assignee
TELEPHONWERKE GES MIT BESCHRAE
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 TELEPHONWERKE GES MIT BESCHRAE filed Critical TELEPHONWERKE GES MIT BESCHRAE
Application granted granted Critical
Publication of GB191007851A publication Critical patent/GB191007851A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Push-Button Switches (AREA)
  • Automatic Disk Changers (AREA)

Abstract

7851. Deutsche Telephonwerke Ges. Nov. 8, 1909, [Convention date]. Automatic exchange systems.-Relates to impulsetransmitters particularly applicable for automaticexchange telephone systems. The keys d have a certain freedom of movement, and, by their operation, vary the position of stops r co-operating with a stepped strip e in such a manner that the stops limit the motion of the contact mechanism q, u, v. In the form shown, a framework b, f, g, pivoted on an axis c, carries a number of bars t, to which the key-bars t<1> are attached by pin-andslot connexions i, k. When a key is depressed, its projection r is moved to the right, and limits the depression of the key by engaging the stepped strip e. During the downward movement of the frame b, the sector m moves the pawl o idly over the inside teeth of the cam-disk p, the pivoted projection s preventing the possibility of the closing of the contact u, v. During the return movement of the frame b, the disk p and projection s intermittently close the contact u, v.
GB191007851D 1909-11-08 1910-03-31 A Device for Sending Current Impulses particularly applicable to Automatic Telephone Systems. Expired GB191007851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE225586T 1909-11-08

Publications (1)

Publication Number Publication Date
GB191007851A true GB191007851A (en) 1910-09-15

Family

ID=33442448

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191007851D Expired GB191007851A (en) 1909-11-08 1910-03-31 A Device for Sending Current Impulses particularly applicable to Automatic Telephone Systems.

Country Status (3)

Country Link
DE (1) DE225586C (en)
FR (1) FR413850A (en)
GB (1) GB191007851A (en)

Also Published As

Publication number Publication date
FR413850A (en) 1910-08-19
DE225586C (en)

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