Abstract: Portable apparatus for automatically constructing prefabricated stud walls or other frame structures from standard materials. Elongate studs are placed transversely at spaced intervals between a pair of elongate wall plate members by a reciprocatingly rotating stud-selecting mechanism and a linearly reciprocating spacer mechanism. As each stud is placed between the plate members, it is automatically nailed thereto, forming a portion of the wall frame, after which the completed portion of the frame is advanced an incremental distance along an assembly structure by the spacer mechanism, which pushes on the newly nailed stud to advance the frame to a position for nailing the next succeeding stud, and so forth in automatic cyclic fashion. A semi-automatic sheathing fastener mechanism includes a plurality of fastener guns and an automatically controlled actuation mechanism for placing fasteners at predetermined locations.

Abstract: Apparatus for automatically constructing prefabricated building stud walls or other frame structures from standard raw materials. Elongate studs are placed transversely at spaced intervals between a pair of elongate wall plates by a reciprocating stud selector and drive mechanism. As each stud is placed between the plates it is automatically nailed thereto, forming a portion of the frame, after which the completed portion of the frame is advanced an incremental distance along an assembly structure by the drive mechanism, which pushes on the newly nailed stud to advance the frame to a position for nailing the next succeeding stud, and so forth in automatic cyclic fashion. Glue may be applied to the completed portion of the frame and, as soon as a large enough portion is completed, sheathing material may be placed thereon and fastened thereto by the glue and/or mechanical nailers. In the interim, holes for receiving electrical and plumbing conduit are drilled in the studs.

Abstract: A room status signaling system is disclosed herein employing a plurality of separate signaling circuits employing the internal telephone wiring so that a separate signaling circuit is provided for each room. The plurality of signaling circuits terminate at a central location or board having an indicator such as a lamp for displaying the status of a room. Each signaling circuit not only includes an indicator lamp in series, but further terminates at its opposite end to a switch located at the room. The switch includes a housing having a slot adapted to receive a coin and a chamber for holding the coin after it has been inserted into and through the slot. The chamber further includes a pair of fixed spaced apart contacts which are insulated from each other and which are mechanically and electrically connected together when the coin is held in the chamber of the holder.