Abstract: There is provided a design of a device consisting of a patterned semiconductor material to provide enhanced detection bandwidth and efficiency of terahertz (THz) pulses with an electro-optic sampling. One device has a semiconductor crystal having a patterned grating on a surface of the semiconductor. In a system, there could optionally be a quarter-wave plate after the semiconductor crystal, followed by a prism. A pair of balanced photodiodes can optionally be provided after the prism. A pulse laser having a NIR beam and THz beam is sent through the semiconductor crystal to the quarter-wave plate to the prism to the photodiodes, wherein the patterned grating on the semiconductor crystal diffracts the NIR beam while the THz remains unaffected. The photodiodes can detect the result.

Abstract: Described are various embodiments of a system and method for selectively identifying the presence of a designated chemical species within a chemical sample using a two-dimensional sensor, which, when exposed to illumination, provides a differentiable adsorption sensor response signal for chemical identification.

Abstract: There is provided a design of a device consisting of a patterned semiconductor material to provide enhanced detection bandwidth and efficiency of terahertz (THz) pulses with an electro-optic sampling. One device has a semiconductor crystal having a patterned grating on a surface of the semiconductor. In a system, there could optionally be a quarter-wave plate after the semiconductor crystal, followed by a prism. A pair of balanced photodiodes can optionally be provided after the prism. A pulse laser having a NIR beam and THz beam is sent through the semiconductor crystal to the quarter-wave plate to the prism to the photodiodes, wherein the patterned grating on the semiconductor crystal diffracts the NIR beam while the THz remains unaffected. The photodiodes can detect the result.

Abstract: The present invention is concerned with a probe assembly for plasma blasting or fragmenting a substance such as rock, concrete and the like. The probe assembly contains a probe made of two coaxial electrodes separated by a dielectric material; a termination box secured to the probe and coupled to an energy storage module, and containing electrical connections between the probe and the energy storage module; and dampening means for dampening the movement of the termination box and the probe after a blast.

Abstract: An accelerometer for blast monitoring comprises at least one piezoelectric transducer having a piezoelectric membrane attached along the edge thereof to the sidewall of a suitable container and mounted for free movement in such container for generating a high impedance electrical output signal upon deformation of the piezoelectric membrance by vibration during a blast, a high to low impedance converter connected to the piezoelectric membrane for converting the high output impedance of the piezoelectric membrane into a low impedance signal for transmission through long cables to recording equipment, and means for encapsulating the piezoelectric transducer and converter into epoxy or other solid material to minimize response of the transducer to surrounding acoustic signals.

Abstract: A lock plate is disclosed. It consists of a locking lever 4 with two stable positions on which an intermediary opening lever 14 is mounted so as to pivot. The latter lever avoids being moved through disengagement by means of an outside control lever 17 when the locking lever 4 is in its locked position. In the unlocked position, the hinge axes 16, 13 of the outside control lever and the intermediary lever are superimposed.

Abstract: A crank drives, by the intermediary of a system of cable and pulleys a carriage sliding on a fixed slide bar parallel to the displacement of sliding panels such as windows in an automobile so as to catch a latch and then drive in any direction the panels to be displaced, simultaneously or successively, the latch being part of a mobile slide bar serving as support independently for each of the panels and sliding with the carriage on the fixed slide bar.

Abstract: A latching plate, especially for automobile doors, characterized by a multifunction principal lever which can pivot, about an axis fixed to a support, either in a first direction in order to lock the latch, whether under the action of an external locking bolt or under the action of an internal control lever, or in a second direction, opposite to the first, in order to unlock the latch and open the door under the reverse action of the internal control lever or the bolt, or even in order to unlock the latch automatically by slamming the door on closing it.

Abstract: A device for the driving of sliding panels, especially horizontally-sliding windows in an automobile, including a crank driving a command part which transmits its movement to several panels sliding in their plane, one relative to the other and in a predetermined direction, characterized by the fact that the transmission of movement is achieved by cables and pinions, and the command part is a plate having one or more grooved sections cogged and concentric, forming alternate racks with partial cogs which can drive a receiver pinion whose simultaneous or successive rotations in the same direction or in opposite directions for a predetermined rotation direction of the crank allow the panels to be driven relatively, according to the same operational sequence, predetermined by the configuration of the cogged sections.