Abstract: Penetration Enhancing Compounds for use in welding is characterized as comprising select alkali metals and alkali earth metals and halogens.

Abstract: A removable safety barrier erectable around the perimeter of a swimming pool or the like including a plurality of upright barrier elements positionable end-to-end around the pool and an alarm arrangement for detecting relative movement between adjacent barrier elements as when a child attempts to enter the pool. Electrical connection between adjacent barrier elements for the alarm is automatically made each time the device is erected around the pool. Improved resistance to tearing, ripping or pulling the restraining mesh from support members is also provided.

Abstract: A collapsible, durable, mildew proof safety barrier comprising a plurality of vertical support members which are supported in sleeves inserted within the ground, at least one flexible restraining panel connected between the vertical support members, a connecting device for connecting the restraining panel to each of the vertical support members, and a line or rope connected to the top of the panel. In the preferred embodiment the safety barrier is placed around the perimeter of a pool to prevent the unauthorized entrance into the pool. Because of the placement in a potential humid area, the preferred embodiment provides that the vertical support members and the panel fasteners are made of aluminum; the restraining panel is made of polycoated nylon to provide a longer life for the safety barrier. When the fence is not needed, it is simply removed by taking the vertical support members from the sleeves and folding the fence into a storable position.