Abstract: A fracture tank for use in oil fields and the like that is readily adaptable for manipulation in hilly and muddy terrain by being pushed by a bulldozer or similar piece of equipment. The undercarriage of the fracture tank is encased tapered skid plates to enhance the support area, while accommodating the movement of muddy or loose soil therethrough, while the fracture tank is slid over the terrain. The formation of skid plates preclude the compacting of mud and dirt within the undercarriage as in the prior art. The fracture tank is further provided with a strengthened rear bumper assembly and wheel spring hangers to allow for forceful movement when the rear wheels of the tank are frozen or compacted with dirt and mud to a point that they are substantially immovable. The fracture tank is further provided with a purging system consisting of an inlet spray tubing and an outlet drainage. Additionally, tubing is provided for conveying heated gas within the interior of the tank and venting the same out of the top.

Abstract: A fracture tank for use in oil fields and the like that is readily adaptable for manipulation in hilly and muddy terrain by being pushed by a bulldozer or similar piece of equipment. The undercarriage of the fracture tank is encased tapered skid plates to enhance the support area, while accommodating the movement of muddy or loose soil therethrough, while the fracture tank is slid over the terrain. The formation of skid plates preclude the compacting of mud and dirt within the undercarriage as in the prior art. The fracture tank is further provided with a strengthened rear bumper assembly and wheel spring hangers to allow for forceful movement when the rear wheels of the tank are frozen or compacted with dirt and mud to a point that they are substantially immovable. The fracture tank is further provided with a purging system consisting of an inlet spray tubing and an outlet drainage. Additionally, tubing is provided for conveying heated gas within the interior of the tank and venting the same out of the top.

Abstract: A telephone exchange conference circuit for three-party conferences, receives the PCM bytes from the conferees in a FIFO store (4), and checks the bytes in a processor (1) to find the one for the loudest outgoing speech. This is then sent to another FIFO store (5) for transmission to the other conferees. This loudest speech sample is sent to all conferees other than the one which originated that sample: he gets a silent code.The system has two time slots per conferee, one for "talk" and for "listen".