Abstract: A vibration responsive gas shut-off valve assembly which is highly effective in conditions which give rise to excessive vibration such as earthquakes and the like. The shut-off valve assembly is inserted into a gas line leading from a source of gas to an interior of a building such a dwelling structure. The valve assembly comprises a spherically shaped ball which may be located within the gas line and which contains a gas passage channel extending therethrough. When the ball is in a first position, gas will flow from one side of the ball through the channel and to the other side of the ball in the gas line. When the ball is in a second position, the channel is located so that one side is vented through an orifice in the pipe and the other side is in communication with the downstream side of the pipe such that gas in the downstream side of the pipe leading to the building can be vented.

Abstract: In a television signal synchronizer having a coherent memory, it is necessary to modify the writing of data into memory or the reading of data out of memory in order to provide field conversion. In the described apparatus, the reading out of data is always done according to a non-variant sequence determined by the local (studio) reference timing signals. In a first embodiment the read address generator signals are modified so as to read out the stored video signal in accordance with the non-variant write in sequence. In a second embodiment the write address generator signals are modified so as to position the incoming video signal into memory so that it is located in the proper memory position for the non-variant read out sequence.

Abstract: Television synchronizer apparatus includes a coherent memory with preassigned fixed burst phasing of 0.degree. or 180.degree. for each line store of color video image information. The incoming synchronizing components including burst are discarded on the premise that they are well-known repetitive functions. The incoming color video image information is read into the memory coherent with the preassigned burst phasing, thereby significantly reducing the memory storage capacity normally utilized to store sync and burst information.