Abstract: A low tire warning device for pneumatic vehicle tires comprises a flexible stem attached to the vehicle side of a wheel, the stem contains an offset internal expansion chamber which will distort the stem assymetrically when pressurized by the air within the tire. This will displace a metal tip clear of an adjacent rod. If the tire pressure drops this will allow the striking tip driven by the rotating wheel to strike the rod, producing an audible sound warning.

Abstract: A wall framing element composed of a vertically extending load bearing member and two obliquely extending brace members which in combination define a generally triangular shape. The obliquely extending brace members are joined to one another at an apex or junction point and a member secured to the junction point affords attachment to the load bearing member of an adjacent element. Telescoping connections at opposite ends of the load bearing member expedite erection of successive stories. Joist members and means for effecting rapid attachment of the joist members are disposed adjacent the upper extremities of the load bearing members. The joist members retain the frame elements in alignment and afford a base for a floor. When erected, the joist members are spaced below the upper extremity of the load bearing members so that the telescoping connection of the elements in the succeeding story can be rapidly effected.

Abstract: A stairway unit for a multi-level construction including briefly: a one-piece metal member forming both treads and risers, parallel metal stringer members each presenting a vertical planar side to the one-piece metal member; and the edges only of the one-piece metal member being connected to the stringers as by welding. No additional tread members are required and the stairway may be used as is, or with the addition of pads and carpeting to the treads and/or risers or with other suitable covers.