A communication system capable of continuously exchanging digital information in a well logging installation between apparatus arranged on the earth's surface and apparatus arranged in an earth borehole, interconnected by a cable. Both the surface apparatus and the downhole apparatus include a controller and a modem for sending digital command messages downhole and digital data messages uphole. Th...

PURPOSE:To cancel shortening of a battery life due to an internal short-circuit by providing the parts, where separators touch the saddles of a battery jar, with slits having the same width with that of the saddles while arranging the separators so that their lower parts may come below the feet of the electrode plates. CONSTITUTION:The parts, where separators 3 touch the saddles of a battery jar, ...

In order to improve the combustion of diesel engine fuels, mixtures of neutral salts of carboxylic acids and metals of Atomic Nos. 57 to 71 and free carboxylic acids are added thereto.

PURPOSE:To stabilize always the gap between the disc and the floating head, by inserting the floating head, which has cavity volume parts and the connection path which connects these parts, between two rotating flexible discs. CONSTITUTION:This mechanism consists of read/write heads 18 and 19 provided correspondingly to magnetic faces 16 and 17 of flexible discs 1 and 2, floating head main body 20...

PURPOSE:To prevent the generation of position shift between a track and a light spot due to movement of a head by inhibiting a light head from being moved in the track jump region. CONSTITUTION:When light spots S1, S2 reach a track jump region (b), a photo interruptor 12 is activated, then a head move inhibition signal E rises to turn off an analog switch 15. In setting the width of a light shut p...

PURPOSE:To detect specified beams with high precision by constituting a photoconductive element of a thallium halide. CONSTITUTION:A semiconductor photodetector is composed of a ceramic substrate 1, a thin-film 2 consisting of a thallium halide formed onto the ceramic substrate 1 and electrodes 3, 4 shaped at a regular interval. The thallium halide having high spectral sensitivity is employed as a...

PURPOSE:To provide high-accuracy and high-response properties by reducing wasteful time and a response lag, by calculating an injection speed through a time interval of pulses by generating a pulse signal every constant moving distance of an injection molding machine. CONSTITUTION:A pulse generator 30 catches hold of a movement of a movable index member 21 fitted to an injection molding machine 10...

PURPOSE:To detect exactly a designated position by placing three opposed light emitting element/photodetecting element groups, and scanning them successively. CONSTITUTION:A position detecting device is constituted by placing the first light emitting element/photodetecting element group X consisting of seven pieces of light emitting elements X1-X7 and photodetecting elements X1'-X7' to which weigh...

The invention relates to a substantially thixotropic nondilatent cementations admixture for use as a mortar, cement or concrete which comprises an hydraulic cement in combination with presized inorganic filler particles.

The invention relates to a substantially thixotropic nondilatent cementations admixture for use as a mortar, cement or concrete which comprises an hydraulic cement in combination with presized inorganic filler particles.

PURPOSE:To enable to extend the range of data in bit procssing with less number of elements, by providing a decoder and a switching circuit before one input of an operation processor, in a bit processing of a microcomputer. CONSTITUTION:A input/output terminal 17 and a data storage RAM18 transmit the respective data to the 1st bus line 12 in 4-bit and applied to one input of an operational proces...

PURPOSE:To simplify a pre-processing circuit of parity, and to make a condition of right shift and left shift for forecasting the parity unnecessary, by using the same shifting circuit for the parity and a data. CONSTITUTION:To an input data register 21' of an input register device 21, (n) bytes to which a parity bit has been added at every byte are set, and from parity bit generators 24, 25, pari...

PURPOSE:To easily perform the test of a memory cell array by providing a switch means that is capable of accessing from an outside to perform the test of a check bit memory cell array. CONSTITUTION:A circuit 11 is a switch circuit as a switching means and a main amplifier 12 outputs a data inputted from a memory cell array 3 or a check bit memory cell array 4 as a data (p). A complementary signal ...

PURPOSE:To provide a variety of functions in one IC by superposing many lead frames in which semiconductor chips are mounted in a multiple structure, and integrating them with molding resin. CONSTITUTION:Chips 11, 12 are respectively mounted on lead frames 21, 22, wired by bonding wirings 31, 32, disposed in a multilayer structure, and sealed integrally. Thus, the functions of one IC can be increa...

PURPOSE:To provide adhesive force endurable sufficiently for bending fatigue, by a method wherein after synthetic fiber cloth has been treated with an organic silane coupling agent beforehand laminate vulcanization of the same with silicone rubber is performed. CONSTITUTION:Concentration of a coupling agent like trialkoxy aminopropyl silane or trialkoxy vinylpropyl silane is decreased to an extend...