Abstract: A belt has a posture warning device maintained therein. The belt includes a strap with a buckle at one end thereof. The strap includes pockets which receive a battery and an electrical bell or buzzer. An electrical contact is maintained on the strap and connected to the battery, while the buzzer is electrically connected to the buckle. Movement of the buckle against the electrical contact completes the circuit between the battery and buzzer to emit a sound indicating to a wearer that he has allowed his abdominal muscles to relax to a point evidencing bad posture. The buckle is biased away from the electrical contact by means of springs interconnected between the strap and buckle such that, when the wearer evidences good posture and abdominal muscle control, the buzzer is inactive.

Abstract: This invention relates to glass sheet conveyor rolls and, particularly, those that are useful in conveying glass sheets through a hot atmosphere. The gist of the invention resides in the manner of supporting rigid, unitary conveyor rolls on three bearing housings, a pair of which is located to one side of the conveyor path provided by a set of conveyor rolls. According to a specific embodiment of this invention, the outer bearing housing of the pair of bearing housings is supported slightly above the one horizontal plane of support for the other bearing housings supporting each conveyor roll so as to impart a stress causing each conveyor roll of cylindrical configuration to develop a slightly concave upper surface during rotation.