|
US3249933A
|
|
Electronic bell device for railroad locomotive
|
|
US3089432A
|
|
Electric control for carrier system
|
|
US3185907A
|
|
Capacitor with metallic embedded plastic electrodes
|
|
US2824979A
|
|
Ultrasonic fissure detector
|
|
US2761313A
|
|
Hardness tester
|
|
US2538366A
|
|
Quenching device for quenching the ends of abutting rails in a track joint
|
|
US2388683A
|
|
Method and apparatus for detecting flaws in rails
|
|
US2337058A
|
|
Method of dismantling and rebuilding steel tanks
|
|
US2263621A
|
|
Rail quenching apparatus and method
|
|
GB485966A
|
|
Improvements in or relating to the electric heat treatment of steel rails
|
|
US2103716A
|
|
Rail treatment method
|
|
US2143347A
|
|
Rail hardening method and apparatus
|
|
US2170859A
|
|
Method of repairing rail ends
|
|
US2070890A
|
|
Rail joint and method
|
|
US2060985A
|
|
Rail heating method
|
|
US2032407A
|
|
Temperature measuring apparatus
|
|
US2001097A
|
|
Hardness tester
|
|
GB420008A
|
|
Improvements in processes and apparatus for hardening rails
|
|
US1992943A
|
|
Rail heating apparatus
|
|
US2070889A
|
|
Rail treatment method
|
