|
ES111282A1
|
|
An unsharp nut system.
|
|
GB191414006A
|
|
Improvements in the Construction of Electric Contact Conductors for Railway Tracks and the like.
|
|
US1233029A
|
|
Electric signaling apparatus for railways.
|
|
US1109899A
|
|
Brush for electric contacts.
|
|
US1124864A
|
|
Indicating, registering, and controlling device worked by an electric current.
|
|
US646067A
|
|
Apparatus for recording flexure of railway-rails, &c.
|
|
GB189720656A
|
|
Apparatus for Registering the Flexure of Railway Rails and Signalling Passage of Trains.
|
|
CA293229A
|
|
Nut and washer
|
|
CA271680A
|
|
Pedal apparatus for railway signalling
|
