Abstract: A battery box for an engine driven welding machine slides in an opening in the welding machine base between closed and open positions. When the battery box is in the closed position, a battery secured to a battery box is concealed inside the base. When the battery box is in the open position, the battery is exposed for servicing. Panels assembled to the base define an opening in the base. The panels cooperate with the base floor to form slots in which the battery box slides. The panels and base floor provide a cantilever support for the battery box when it is in the open position. A finger hole in the battery box is surrounded on one side by a small housing that keeps foreign material out of the machine base when the battery box is in the closed position.

Abstract: In the manufacture of an electrical strain gauge the strain-responsive circuit element is formed from a thin film deposit on a surface of a metal substrate on which an insulating film has already been deposited. Connections are made directly to the circuit element by the ends of conductor leads that are bonded into insulating plugs in apertures in the substrate. The plugs and the insulating film are glasses to which the substrate and the circuit element are bonded. A further glass layer encapsulates the circuit element. As a result a very robust form of gauge is provided that can be used in high temperatures and in chemically active environments.

Abstract: An electrical strain gauge is provided in which the strain-responsive circuit element is formed from a thin film deposit on a surface of a metal substrate on which an insulating film has already been deposited. Connections are made directly to the circuit element by the ends of connecter leads that are bonded into insulating plugs in apertures in the substrate. The plugs and the insulating film are glasses to which the substrate and the circuit element are bonded. A further glass layer encapsulates the circuit element. As a result a very robust form of gauge is provided that can be used in high temperatures and in chemically active environments.