Assertion: electrical conduit | /r/CapableOf | define internal air passage
Facets:
value: for transmitting air therethrough
type: PURPOSE
Source sentences:
text: Pneumatic cord threading apparatus for threading a Wire pulling cord through an electrical conduit, comprising, a tubular air supply fitting defining "an internal air passage for transmitting air therethrough, said fitting having a generally right angle bend in the medial portion thereof and two legs of materially unequal length extending from the bend, the outer end'of each leg being dimensioned to fit into the outlet end of an air supply hose and having means encircling the adjacent end of said air passage to form a seal between the latter and the outlet end of the hose, a centrally open sealing ring shaped and dimensioned to fit in detachable encircling relation to the outer end of either of said fitting legs to form a seal therewith; said sealing ring, when disposed in encircling relation to one end of the fitting which is used as the air outlet end thereof, defining a sealing surface extending radially outward from the fitting to be pressed against and form a seal with one end of an electrical conduit, said fitting defining in said bend therein two apertures aligned with segment of said air passage in said respective fitting legs and being dimensioned transversely to closely encircle wire pulling cord, each of said apertures opening outwardly to receive wire pulling cord from a supply of cord located outside the fitting, each of said apertures opening inwardly into the fitting to pass wire pulling cord into said air passage to pass out through the end thereof aligned with the aperture, means for clos ingeither of said apertures selectively to block the outflow of air therethrough while wire pulling cord is moving in through the other of'the apertures;