GPO TELEPRINTER No. 7

This is a Creed and Company manufactured start-stop combined receiving. and transmitting (Page or Tape) printing unit, with or without perforating keyboard. Those items with perforating keyboards are distinguished by the addition of /PK to the title number. They use the 5-unit International No. 2 signalling code.

Educational Pamphlet on the Teleprinter No. 7.

Teleprinter No. 7A
See E.I. Telegraphs, Teleprinter C1001.

Teleprinter No. 7B, Tape
Similar to the page machine with a printing attachment using paper tape.

See E.I. Telegraphs, Teleprinter C1010 and Telegraphs, Teleprinter C1050.

Diagrams - TG(L) 1101/0 and TG(L) 1101/1.

Teleprinter No. 7B/PKN3, Page
Similar to Teleprinter No. 7B, Page, but is fitted with a saw-tooth keyboard which includes a perforating unit which is controlled by keyboard operation for production of 5-unit fully-perforated tape. The perforating unit may be made inoperative by means of a throw-out lever. RUN-OUT, HERE-IS and WRU keys are provided. A/B off-normal contacts not provided.

See E.I. Telegraphs, Teleprinter C1061.

Diagram - TG(L) 1101/1.

Teleprinter No. 7B/RP, Page
Superseding Teleprinter No. 7B/PKN3, Page which it closely resembles.

The perforating unit is controlled from the combination head so that the machine may be used as a reperforator as well as a keyboard perforator. Mechanism is provided to enable perforation of WRU, Bell and A/B codes to be suppressed.

See E.I. Telegraphs, Teleprinter C1062.

Diagram - TG(L) 1101/1.

Teleprinter No. 7D, Page
Used on automatic switching net-works. Differs from Teleprinter No. 7B, Page in having a 33-way signalling cord, quick-start motor, timed answer-back off-normal contacts, motor on-speed contacts.

Motor auto-start-stop switch omitted.

See E.I. Telegraphs, Teleprinter C1070.

Diagrams - TG1259, TGW1259 and TGU1259.

Teleprinter No. 7D/RP, Page
Used on automatic switching net-works. Differs from Teleprinter No. 7B/RP, Page, in having a 33-way signal cord, quick-start motor, timed answer-back off-normal contacts, motor on-speed contact. Motor auto-start-stop switch omitted.

See E.I. Telegraphs, Teleprinter C1062.

Diagrams - TG1259, TGU1259 and TGW1259.

Teleprinter No. 7E, Page, 160/240V D.C. or 230/240V A.C.
Similar to Teleprinter No. 7D, Page, but is fitted with overlap-cam receiving mechanism to improve the receiving margin and allow the last character received to be printed without delay (follow-on printing).

See E.I. Telegraphs, Teleprinter C1070.

Diagrams - TG1259, TGW1259 and TGU1259.

Teleprinter No. 7E/RP, Page, 160/240V D.C. or 230/240V A.C.
Similar to Teleprinter No. 7D/RP, Page, but is fitted with overlap-cam receiving mechanism with improved receiving margin.

See E.I. Telegraphs, Teleprinter C1062.

Diagrams - TG1259, TGU1259 and TGW1259.

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Teleprinter No. 7.. Sprocket Feed
Similar to corresponding Teleprinter No. 7..., Page, but with carriage adapted for stationery with sprocket feed-holes.

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