Exercise rowing machine

DETAILED DESCRIPTION We claim: 1.
In combination, an elongated, generally rectangular, tubular rail for an exercise rowing machine formed with outwardly opening channels at opposite sides to provide a laterally spaced pair of roller tracks, and formed at the bottom with an externally exposed, longitudinal T-slot open at the ends for receiving the head and neck of bolts projecting from the rail to make connection with frame members, said rail having a longitudinal slot in its top wall extending from one end of the rail a minor part of the length of the rail, a seat carriage with rollers tracking on the tracks, a timer housed within said rail and having a shaft projecting through said slot, said shaft having a pointer knob on its free end; and rowing arm means operatively associated with said rail.
2.
A combination according to claim 1 in which a cover member is secured to the top wall of the rail and covers said slot, said cover member having time-indicating indicia adjacent the pointer knob.
3.
In an exercise rowing machine, a frame assembly including an elongated, generally rectangular, tubular rail member formed with laterally projecting roller guide tracks along its length for a seat carriage and formed with a longitudinal T-slot along its length which is exposed at the bottom of the rail member and has open ends; same frame assembly also including a bottom support frame unit beneath the rail member; bolts each having an enlarged head retained by said T-slot and having a shank passing downwardly through said support frame unit, said bolts being adapted to be inserted into said T-slot only at its open ends; and rowing arm means pivotally connected to said frame assembly.
4.
In an exercise rowing machine according to claim 3, mounting plates provided by said support frame unit and having said bolt shanks passing through holes in the mounting plates; and nuts threaded onto said bolt shanks and engaging the underside of said mounting plates.
5.
In an exercise rowing machine according to claim 3, front and back lateral members of tubular stock provided by said support frame unit; mounting plates fixed to the top of said lateral members and each having a pair of holes therethrough positioned forwardly and rearwardly of the respective lateral member, said bolt shanks passing downwardly through said holes; and nuts threaded onto said bolt shanks and engaging the underside of said mounting plates, whereby the rail member is secured to the support frame