Headphone bracket, in which the vertical displacement of the listener takes place along the bracket on the listener itself
GB238855A
Improvements in telephone apparatus
GB233733A
Improvements in or relating to telephone instruments
GB255179A
New or improved armature construction or arrangement particularly suitable for use in electromagnetic distant control indicators or signalling apparatus
GB234773A
Improvements in and connected with sound reflective or directive devices particularly applicable for use as horn devices with telephonic loud speakers
GB241021A
Improvements in and connected with automatic regulators comprising hydraulic servo-motors
GB225514A
Improvements in telephone receivers
GB232784A
Improvements in bearings for electric and fluid operated regulators
US1659752A
Multiple-controlled hydraulic servo-motor
US1550467A
Means for regulating electric-current generators
GB233646A
Improvements in automatic hydraulic regulating mechanism
GB157972A
Improvements in and relating to the visible representation of electric signals
GB148432A
Submarine armour
GB148433A
Ball-and-socket joints for the members of divers' armours
GB148969A
Improvements in electric connecting devices for floating and submarine vessels and for diving armour
GB148434A
Hand-members for diving armours
GB148970A
Device for fixing ropes or the like to divers' armours
DE331223C
Installation on signal transmission apparatus with mechanical movement transmission, in which each station has a sending and receiving system, in particular for use on ships
GB191516849A
Improvements in and relating to Armoured Diving Suits.
