| Ring Driver No. 1 For use on Relays. A.T. &
E. Co.'s math type.
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| Ring Driver No. 2 Used on Relays. Siemens' pendant
armature type for adjusting GEC type master oscillators.
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| Ring Driver No. 3 Used with Labels Nos. 201 and
206. Teleprinter Nos. 7A and 7B. Answer-back barrel.
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| Ring Driver No. 4 Used on 2-motion selectors 2000
type. Mechanically operated spring-set bearings. And for core
fixing nut on Ratchet Relays.
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| Ring Driver No. 5 Used on Bellsets
Nos. 25, 26 and 31 when fitted with ring-headed screws (Part No.
1/SSC/338).
Also for fitting and removal of Type Head Clutch Drum on
Teleprinters Nos. 7A and 7B. |
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| Ring Driver No. 6 Locking spanner for
multi-frequency generator governor contacts.
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| Ring Driver No. 7 For use with Ends, Sealing, No.
3A.
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| Ring Driver No. 8 For use on Relay-set fixing nuts
of Switchboards PMBX No. 4.
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| Ring Driver No. 9 For TXK1 and 2 exchanges. 500
type relays. Single coil fixing screws.
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| Ring Driver No. 10 For TXK1 and 2 exchanges. 500
type relays. Twin coil fixing screws.
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| Ring Driver No. 11 Used on Nuts securing
Supervisory panel Jacks TXK3 Exchanges.
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| Ring Driver No. 12 Used on ringnut of Locks No. 41
and 42.
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