A control system providing control from multiple control consoles of a circuit board fabricated device. Indicators at each control console provide users with status information so that users will not command conflicting functions of the device. The control system uses a control circuit arrangement that minimizes the number of printed wires and terminal connectors on a standardized back plane circuit board used in conjunction with the circuit board fabricated device.

Novel 7-substituted-3,5-dihydro-as-triazino[4,3-a]-[1,4]benzodiazepin-2(1H)-ones , 7-substituted-3,5-dihydro-as-triazino[4,3-a][1,4]benzodiazepine-2(1H)-thi ones, the 6-oxide derivatives thereof, the intermediate 5-substituted-2,3-dihydro-2-thioxo-1H-1,4-benzodiazepine-1-acetic acid alkyl esters, pharmacologically acceptable acid addition salts thereof, and processes for the production thereof. The compounds of this invention and the pharmacologically acceptable acid addition salts thereof are c...

Apparatus and method for signaling within a drill hole without disturbing an ongoing drilling operation. High data rates are achieved by using phase and/or amplitude modulation techniques which enable information transfer rates well in excess of the data bit rates being transmitted. The modulation technique provides a multi-level signal which makes optimum use of the amplitude/phase space available. The ability of the invention to substantially increase the carrying capacity of the communication...

An electrically ignited load such as a fusehead is connected to the secondary winding of a transformer. The secondary winding is magnetically linked to a primary winding through a magnetic circuit and the transformer is constructed so as to provide a substantial leakage inductance associated with the secondary winding and effectively connected in series with the load to be ignited. The structure selectively passes electrical ignition energy to the load only in response to input electrical energy...

A digital switching device of the stored program type operating under the control of a central control unit has a multiplexing stage for multiplexing signals from a plurality of ports, an input time switching stage which receives multiplexed signals from the multiplexing stage and outputs them in appropriate time slots, an interface unit connecting the input time switching stage to an output time switching stage and a demultiplexing stage which demultiplexes signals from the output time switchin...

Milling apparatus wherein material to be milled is agitated with a charge of particulate material also includes one or more predispersing chambers through which the material to be milled enters the apparatus. The chamber includes pumping means which carry out predispersing work.

A monitor for monitoring the performance of a digital transmission system has three level sensors for sensing at decision instants the level of a signal derived from a transmitted signal. A first of the level sensors has its threshold set at a level corresponding substantially to the eye diagram amplitude, a second has its threshold set near the upper level of the eye diagram amplitude, and the third has its threshold set near the lower level of the eye diagram amplitude. The outputs from the le...

An air washer comprises upper and lower plenum chambers which are separated by a panel which carries tubes. A spray nozzle above each tube is oriented to direct the conical spray it forms into the tube to wet the lower half of the bore of the tube. An inlet duct communicates with the lower plenum chamber. A tank is provided below the lower plenum chamber. Filter apparatus is provided in the tank. A fan communicates with the upper plenum chamber and draws air from the inlet duct via the plenum ch...

A method for use under program control in a digital computer for automatically evaluating compiler level language logic condition sets and for compiling machine executable instructions directly therefrom is disclosed. More specifically, a unique method of constructing an array of novel logical linkages is described which permits an especially rapid direct compilation of an efficient and optimum-sized set of machine executable instructions without constructing the usual logic decision tables or g...

A safety harness particularly adapted for use by hunters who hunt from trees. The harness includes a waist web, a chest web, a shoulder web all slideably engaging a rear gang connector, a lifeline attached to the rear gang connector and adjustable quick release buckles attached to the chest and waist webs, respectively. The rear gang connector causes any tension in the lifeline to be evenly distributed between the chest web and the waist web in the event of a fall. The quick release buckles perm...