PURPOSE:To obtain a compound semiconductor layer of good characteristics by providing a buffer layer of compound semiconductor at low temperature by which migration of atoms of the III-V compound semiconductor is impossible after treating an Si substrate at 800 deg.C or over and then growing the same semiconductor layer at an usual temperature. CONSTITUTION:An Si substrate is treated at 900 deg.C ...

A string-up system and apparatus, using a novel dual-slotted traverse guide (12), with preferential string up of a first yarn in the one slot (29), associated with transfer means (46) to move a yarn, if desired, out of the first slot (29), so this yarn is strung up in the second slot (30).

To open out and untwist a twisted yarn, an air stream is used with at least two alternating and interrupted streams, directed towards the longitudinal axis of the air stream guide. The laternating frequency of the air streams is in the order of several hundred Mz.

PURPOSE:To surely perform the fault diagnostic of the output mechanism of a dual port memory(DPM) by setting an interruption signal to another microprocessor as input to a microprocessor, and judging the fault of the output port of the dual port memory based on an input signal. CONSTITUTION:When an interruption request signal is inputted from one microprocessor 13 to the port on one side of the du...

A pool cue chalk holder is disclosed including a clip that is selectively attachable to an article of clothing and complementary first and second hook and loop fastening elements. The first and second fastening elements are secured respectively to the clip and to a pool cue chalk and are selectively engageable with each other to detachably fasten the chalk to the clip.

A microcomputer interface arrangement includes a microcomputer having I/O ports coupled to individual interface units. A fault detection circuit detects a fault in an interface unit, interrupts the microcomputer and inverts the input state of the faulty unit without affecting the output states so that the faulty unit can be identified by the microcomputer by reading inputs of the interface units.

The circuit arrangement comprises, for each bit location in a column of the RAM, an input shift register, a multiplexer and a comparator. The input data bit is stored in the shift register, and the multiplexer is arranged during a write cycle, to write the data bit into the bit position. During a verification cycle, the multiplexer is arranged to write the inverse data bit into the same position, ...

A radio (or other form of electromagnetic signal) receiver is included in an intruder alarm system, or added to an existing intruder alarm system, such that on receiving the signal from an associate transmitter it causes the alarm system to become 'disarmed'. When the radio receiver cannot detect the signal from the transmitter it causes the alarm system to become 'armed'.

A device for membrane separation by filtering or distillation comprises at least two plates (10, 101, 102, 103, 201, 202) arrangedin a stack and membranes (13, 130, 150, 230, 250) arranged between the plates. Together with the membrane arranged between the plates, the recesses (11) provided in the plates form spaces (14a, 14b, 14c) included in a separation cell. The separation cell comprises at le...

An electromagnetic shielding panel (1, 2, 3, 4, P5) incorporates at least two electroconductive coatings (10 and 6, 7,8). In two of the panels (1,2) the coatings are carried on separate sheets of float glass (5,9), one of the coatings 10 being an anti-abrasive coating is on the outermost surface of the glass (9) in the panel arrangement, while the other coating (6,7,8) being a relatively soft abra...

The present invention discloses a double guided slide valve apparatus for producing pressure pulses in drilling mud medium flowing through a drill string casing.

PURPOSE:To hole and make free a wire between a fixing side clamping seat and a movable side clamping seat, and to increase working speed, improve accuracy and lengthen a lifetime by elastically deflecting a bonding section formed between a fixing section and a movable section. CONSTITUTION:A bonding section 13 being shaped between a fixing section 1 and a movable section 2 and elastically bonding ...

PURPOSE:To obtain a superconductor having stable properties by applying a multiple oxide in which the composition ratio between Ba and Cu is specified to the surface of a metallic body of Ln (Y and lanthanide elements) by hot dipping and then subjecting the above metallic body to two-stage heat treatment under respectively specified partial pressures of oxygen. CONSTITUTION:A multiple oxide in whi...

Means for organising the construction of an article chosen from many similar articles each comprising a combination of a multiplicity of component parts, the incorporation of some of which is optional and the incorporation of others of which is dependent upon part options already chosen, in which, first: (a) there is prepared an ordered total parts list of all the component parts, the incorporatio...

A fan clutch assembly for a vehicle includes a flexible, ferromagnetic valve plate for controlling fluid flow through a pump plate into a shear zone. When an electromagnetic coil is energized, the resulting flux deflects the valve plate away from the pump plate to open fluid gates in the pump plate. When the coil is de-energized, the valve plate returns to its original engagement position against ...