Top watcher warning device for trucks and the like

Details Top watcher warning device for trucks and the like Top watcher warning device for trucks and the like

1977-08-01

1981-12-22

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

200 6144, G08B 2100, H01H 316

Patent

active

043073751

ABSTRACT:
A device mountable on top of a truck cab so to automatically warn a truck driver if the truck body can clear underneath a bridge or other overhead structure; the device consisting of an upwardly telescopic rod that is adjustable to the height of the truck body or box and which, upon contact with any overhead object, will flex and bend over so to act as a switch arm of a switch for closing an electric circuit to either a light on the dashboard or other signalling device to the driver.

REFERENCES:
patent: 2520305 (1950-08-01), Campbell
patent: 2554371 (1951-05-01), Marx
patent: 2812397 (1957-11-01), Taylor
patent: 2834002 (1958-05-01), Nordsiek
patent: 2847527 (1958-08-01), Wolters
patent: 2894087 (1959-07-01), Kramer
patent: 3232265 (1966-02-01), Hurt
patent: 3269783 (1966-08-01), Kriz
patent: 3488461 (1970-01-01), Webb
patent: 3996950 (1976-12-01), Mier

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