Drive device for tape or wire-shaped, preferably magnetic sound carriers
DE539194C
Process for operating electric motors that can be fed by alternating or direct current
DE512413C
Pen holders, in particular for electrical image transmission devices
DE512412C
Removable guide device for generating a feed or stroke movement by means of a rotating spindle, preferably for electrical image transmission devices
GB327257A
Improvements in electromagnetic clutches
DE555787C
Device for synchronous reproduction of sound and image using a special image and sound carrier
DE544364C
Selector for telecommunication systems with brushes moved by an external drive
DE485839C
Double armature relay for telecommunication purposes
DE567281C
Circuit arrangement for telephone systems with distributor selectors
DE478661C
Circuit arrangement for dialers in telephone systems, whose brushes moved by an external drive (spring force) are incrementally advanced from contact to contact by applying control potential
DE566140C
Circuit arrangement for telephone systems with call folders
DE499793C
Circuit arrangement for self-connection telephone systems
DE490364C
Arrangement for the blank wiring of dialers for self-connecting telephone systems
DE486501C
Arrangement for dialers in telephone systems with external drive
DE435363C
Device for rectifying alternating currents
DE477374C
Voters, especially for telecommunications systems
DE526031C
Arrangement for dialers with external drive
DE486239C
Switching device for setting waves, in particular for dialers in telecommunications or telephone systems
DE428872C
Circuit arrangement for preselectors in telephone systems with dialer operation
