Methods and apparatus for communicating between surface equipment and downho le equipment. One embodiment of the invention provides a wellhead assembly that allows electrical power and signals to pass into and out of the well during drillin g operations, without removing the valve structure above the wellhead. Another embodiment of the invention provides an electromagnetic casing antenna system fo...

A method for analyzing in real-time in a paper machine or board machine the surface structure of a web (1) of paper or board which method comprises the direction of an imaging system towards a pre-determined area (3) of the web (1), the arrangement of an illumination system to illuminate the region from a pre-determined direction with obliquely incident light, and the arrangement of an image analy...

The invention relates to a shell 2 for a vehicle part 8 and a method for colouring a vehicle part 8 whereby the shell 2 comprises a transparent outer carrier layer 4 and a coloured inner layer 6. The shell 2 is vacuum-formed so that the dimensions of the inside 7 of the shell 2 correspond to the dimensions of the outside 9 of the vehicle part 8, and the coloured inner layer 6 is applied to the tra...

The stereo loudspeaker has the first sound source (1002) for reproducing the signal of the first stereo channel and the second sound source (1003) for reproducing the signal of the second stereo channel. The stereo loudspeaker further includes the sound guide (401, 501, 701, 711, 721, 731, 901) and in it opposed to each other the first part (502) and the second part (503) placed in a way that the ...

The invention relates to a system for detecting and reporting a sudden traffic jam, essentially having the object of reducing, as much as possible, the number of serious accidents that take place, first of all the highway. It is made up of a set of devices which, put together, create an original system able to automatically carry out controls and send pieces of information. The invention puts itse...

Fast locking element, in particular for anti-skid devices for vehicle wheels, comprising an external bushing (3) and an internal bushing (5), wherein said external bushing (3) and said internal bushing (5) present respectively an internal wall (14) and an external wall (18) both being shaped so that, by rotating one of the two bushings (3,5) with respect to the other, a radial compression of said ...

A system for articulably bearing a prefabricated structural member on a foundation comprises a first static hinge (26, 27) interposed between the base (20) of the upright (14) of the structural prefabricated member (12) and the foundation (22), and an additional static hinge (28, 29) which is also arranged between the base of the upright (14) and the foundation (22) and has a rotation axis paralle...

The actuator includes a stationary outer nut (20) frictionally and threadingly engaging a tubular screw (19). A sleeve member (18) is rotatable within the tubular screw (19) by means of a shaft (15) rotated by a motor (11-13). The sleeve has first ramp surfaces (22, 22a) inclined and facing second ramp surfaces (23) formed by a piston (21), which is axially movable between a passive retracted posi...

Support accessory for a hinge (12) to articulate a movable structure (13) with respect to a fixed frame (11), and relative method of construction. The support accessory comprises, in a single piece, at least a base body (15), able to be attached to the frame (11) and on which at least a housing seating (23, 25) is made for an attachment component (27, 29) to attach the hinge (12), and a clamping e...

A tensioning device for electric chain saws comprising a casing 2 provided with a closure cover 3 and housing a bar 16 along which the chain 12 is guided, said bar 16 being provided with a slotted aperture engaged by a threaded pin (16, fig 1) rigid at one end with the casing and engagable at the other end by a tightening knob (20, fig 1) said bar 16 being provided with a lug (24, fig 1) engagable...

A safety device for electric chain saws or power chain saws comprising a casing 4 housing a motor, the shaft 8 of which carries a step-down gear unit 6, 10 for driving the toothed chain 16 stretched along a return bar 18, and a disc 20 on which a band brake 22 acts, the safety device comprising:

• a braking member 26, 30,
• elastic means 34 which urge said braking member 26, 30 aga...