Improvements in and relating to type wheel mechanisms for telegraph receivers and like apparatus
GB421227A
Improvements in and relating to telegraph receivers
GB420853A
Improvements in and relating to control devices for telegraph type printing and typesetting machines
GB420820A
Improvements in and relating to telegraphic type printing and setting machines
DE621008C
Elevator device for case dialers and similar switchgear in telephone systems
DE608492C
Circuit arrangement for telephone systems with Vorwaehlerbetrieb
DE609627C
Circuit arrangement for counting the predominantly directional traffic carried over non-directional routes, in particular the axes rolling off overflow mountains
DE596116C
Coin checker for telephone
GB403455A
Improvements in and relating to apparatus for supplying current impulses from mains alternating current
DE608141C
Surge transmitter
DE619838C
Single anchor call and signal machine for telephone exchanges
US1912087A
Selector switch
US1983960A
Current impulse transmitter
GB389999A
Improvements in or relating to keyboard controlled current impulse transmitters
DE615190C
Circuit arrangement for telephone systems with dialer operation
DE615686C
Single anchor call and signal machine
DE611930C
Circuit arrangement for line selectors with parallel selectors and multiple connections
DE586459C
Collector breaker for stepping mechanisms in telecommunication systems
DE577866C
Coin checker, especially for telephones with self-payment
