Yes, it is a concrete noun since you can use one of your five senses to detect it.
Escalator is a noun, not a verb. Escalate is a verb.
escalator companys
escalator function and application
The escalator was invented in 1897 but the "modern escalator" was designed in 1900 by Charles Seeberger.
installation method for escalator
by the circulating belt it keeps the escalator rotating
The Up Escalator was created in 1980.
An Escalator to Christmas was created in 1999-04.
by the escalator
your going back wards
The first escalator was invented by James Reno in Massachusetts
Charles Seeberger is the inventor of the modern escalator. He created it by redesigning Jesse Reno's invention called the inclined escalator.