Car Knocker

CAR KNOCKER"Car inspector or car repairer-from the early custom of tapping the wheels to detect flaws. Also called car whacker; and car toad (because he squats while inspecting), car tink, and car tonk
CAR-SEAL HAWK"Railroad policeman ...

Car Knocker
A car inspector; so-called because these individuals tap the wheels of cars to test for soundness.
Car Toad ...

Car Knocker It was common for car inspectors to tap parts with a hammer. The resulting tone of sound gave clues to the condition of those parts. Ergo, Car Knocker.

Car Knocker - A car inspector, so-called from the men who tap the wheels to test for soundness.
Catenary - Supporting cable for the conductor wire of an overhead electrification system.

" Generally on the prototype this rule is employed by mechanical forces (car knockers) to insure their safety while working around the equipment in shops and yards.

See also: Point, Track, Standard, Rail, Train