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Clues are: the reduced diameter truss(?) bar, few manufacturers used such a small diameter; the characteristic truss fork; the Sears Elgin "like" chain ring.
Perhaps examine the holes in the head tube for attaching a head badge; if they are horizontal, on the opposite sides of the head tube, then it may have sported an Emblem badge, such as "Emblem," "Speedwell," "Eire," or "Greyhound," etc. If the holes are more diagonal, the bike may have been badged as a "Pierce" bicycle, a product label acquired from a bankrupt Buffalo NY concern.
Emblem made Pierce.....another motobike style similar to mine below...Tripple-plate fork crown and HD (thicker) sprocket signifies that this also may be a Walthour-Hood badged heavy service model. Not much known about these so please if you could show the 6-digit(informed guess) serial number on the bottom of the Bottom Bracket Shell...