Abstract: A fly-by-wire control system for an aircraft including detection of pilot induced oscillations and a mobile control unit for such a system. According to the invention, provision is made for the pivotings of the mobile control unit to be damped by a controllable damper controlled by a detector that detects oscillations corresponding to pilot induced oscillations.

Abstract: A fly-by-wire control system for an aircraft including detection of pilot induced oscillations and a mobile control unit for such a system, According to the invention, provision is made for the pivotings of the mobile control unit to be damped by a controllable damper controlled by a detector that detects oscillations corresponding to pilot induced oscillations.

Abstract: A brake booster having a movable partition (6) through which an output force is carried through a first reaction device (24,25) to a brake system in response to an input force applied to a brake rod (9). A second reaction device (29-34) is located between the brake rod (9) and the first reaction device (24,25) and includes a first spring (34) that is compressed by a predetermined reaction force and the input force such that any further input force is carried through a second spring (32) into the movable partition (6) to provide and additional force in the development of an output farce corresponding to a desired a brake application.

Abstract: For a lateral face of the lattice girder, defined by an upper chord and a lower chord, the triangulation comprises compression bars substantially perpendicular to the chords, oblique tension bars of smaller length connecting the top of a compression bar to the lower chord, and other oblique tension bars of greater length, also connecting the top of a compression bar to the lower chord, at a point located further ahead toward the base of the next compression bar. This triangulation is used, in particular, for the jib and counterjib elements of tower cranes.

Abstract: Fly-by-wire control system for an aircraft comprising detection of pilot induced oscillations and a control for such a system. According to the invention, provision is made for the pivotings of said control (2) to be damped by controllable damping means (15, 16) controlled by means (7) detecting oscillations corresponding to pilot induced oscillations.

Abstract: In order to provide additional pneumatic boosting which comes into play only for heavy braking, provision is made, in a pneumatic brake-booster, for some boosting force (28, 33) which is in addition to a boost force (25) normally applied by a reaction disk (24) to be absorbed. In a preferred example, force is absorbed by means of a slide (29) containing an envelope (31) and a plunger (30). The plunger is rigidly fixed to the first reaction device. The envelope rests against a piston (23) of the pneumatic booster. The plunger is expelled from the envelope by a spring (34), the excursion of which is countered by a peg (35) as long as the force applied by a driver is below an intermediate force. Beyond that, the reaction of a hydraulic braking circuit downstream compresses the spring and causes the additional pneumatic boosting to come into effect.

Abstract: The present invention relates to a stable aqueous solution (A) comprising an azo dye, a borate buffer and one or more masking agents, wherein the azo dye changes its coloration or coloration intensity in the presence of chlorine dioxide. The present invention further relates to a process for manufacturing the aqueous azo-dye solution (A), and to its use for the determination of residual chlorine dioxide in water.

Abstract: For a lateral face of the lattice girder, defined by an upper chord and a lower chord, the triangulation comprises compression bars substantially perpendicular to the chords, oblique tension bars of smaller length connecting the top of a compression bar to the lower chord, and other oblique tension bars of greater length, also connecting the top of a compression bar to the lower chord, at a point located further ahead toward the base of the next compression bar. This triangulation is used, in particular, for the jib and counterjib elements of tower cranes.

Abstract: Control system for a control surface (100) of an aircraft comprising at least one actuator (102, 104) of the control surface, connected to a hydraulic circuit and equipped with at least two power jacks (110) capable of operating in at least one activated mode and one deactivated mode. According to the invention, the system also comprises a control unit (114) capable of making a number of jacks operate in activated mode depending on the aircraft flight conditions. Application to aircraft.

Abstract: The invention relates to a pneumatic servomotor for an assisted braking, comprising a rigid casing (1) in which a moving airtight partition wall (2) defines a front chamber (3) and a rear chamber (4), a pneumatic piston (5) travelling with the moving partition wall (2), a plunger (8), housed within the piston (5) and driven by a control rod (7) and controlling the state of a three-way valve (9), force-transmitting means (10, 13, 17, 18, 31), adapted for receiving and transmitting at least one assistance force (Fa), exerted by a front face (51) of the piston (5) when the valve (9) puts the rear chamber (4) under a second pressure (Pa), the plunger (8) including a front section (81) comprising retaining means (18, 31) intended to tie down the front section (81) of the plunger (8) to the pneumatic piston (5).

Abstract: A pneumatic servomotor (1) for an assisted braking having a housing, separated by a diaphragm (5) into a first variable-volume chamber (3) and a second variable volume chamber (7) therein. During a. brake application a force applied to a control rod (13) moves to allow a first flap (19) to isolate the second chamber (7) from the first chamber (3) and thereafter allow a second flap (23) to open and allow pressurized assist fluid to be communicated to the second chamber (7). The diaphragm (5) has a lip (35) thereon that engages the housing to define a thrust chamber (41). On opening of the second flap (19) allows the pressurized assist fluid is initially communicated to the thrust chamber (41) and only after a predetermined travel of the control rod (13) is the pressurized assist fluid communicated to the second chamber (7) for creating a pressure differential between the fluid in the first chamber (3) and second chamber (7) to develop an output force to effect a brake application.

Abstract: This invention relates to a housing for receiving a reaction disk in a pneumatic servomotor. The housing and reaction disk co-operate to resist too fast a forward travel of a piston when the brake is actuated and thereby avoid an undesired reopening of a passage connecting a front chamber with a rear chamber in a brake booster during a brake application. The reaction disk (39) is located in an inner space of the housing (47) that has a greater size than the volume of the disk (39). The disk (39) is initially deformed to completely fill the housing (47) by an input force corresponding to a desired brake application to limit the forward speed of the pneumatic piston and only thereafter as a reaction force develops during the brake application, does the reaction force balance the input force applied to the disk (39) during a brake application.

Abstract: This invention mainly relates to a receiving housing for a reaction disk and to a pneumatic servomotor for an assisted braking, including such housing fitted with its reaction disk.

Abstract: A force transmission and amplification device for a brake system comprising a pedal (1) and an output rod (2) for transmitting by way of the output rod (2) an output force (F2) having a higher intensity than an input force (F1) applied to pedal (1). An input rod (3) is secured to the pedal (1) for supplying a primary piston (4) located in a first diameter (D1) of primary cylinder (5) to delimit a primary chamber (51) retaining a fluid. A second piston (6) secured to the output rod (2) is located in a second diameter (D2) of a second cylinder (7) to delimit a secondary chamber (71). The primary chamber (51) is connected to the secondary chamber (71) to immediately supply pressurized fluid which acts on the second piston (6) to develop the output force (F2).

Abstract: A pneumatic booster operated by a plunger (8) located in a piston (5) with a rear section (82) which operates a valve (91,92,93) to develop a force on the piston (5) to apply a boost force to force-transmission members (12,14). The plunger (8) has a first section (81) connected to the rear section (82) by a spring (15). The front section (81) and the force-transmission members (12,14) defining a retention assembly (16,17) for securing the front section (81) to the piston (5) when a boost force exceeds a predetermined threshold while the plunger (8) is in a maximum actuating position to allow for extended actuation of the booster following a sharp braking action.

Abstract: A device for the control of a control surface of an aircraft has at least two actuators (110, 112, 114), each having at least one electric control input (111a, 113a, 115a). At least one of the actuators (115), called the mixed actuator, also has a mechanical control input (115b), and an electric control system for the actuators is able to occupy a state corresponding to a fault of an engine in which at least two of the actuators simultaneously operate the control surface and a state corresponding to an electric fault, in which the mixed actuator (115) operates the control surface from the mechanical control input.

Abstract: A device for the quick assembly and disassembly of an input rod (1) for operating a brake system and a brake pedal. A clasp (3) is secured to the input rod (1) connecting a spindle (4) fixed to the brake pedal. The clasp (3) has a guide yoke (31) which receives a retaining yoke (32) and blocking members (51,61) which maintain the retaining yoke (32) in a closed configuration with respect to the guide yoke (31). The blocking member comprise at least one lug (51) borne by the retaining yoke (32) which projects toward the guide yoke (31) and opening (61) in the guide yoke (31) which receives the lug (51) with the clasp (3) in moved to a closed configuration. On movement of the clasp (3) toward a closed configuration, parallel cheeks (325,326) of retaining yoke (31) which are squeezed together elastically expand when lug (51) enters opening (61) to lock the clasp (3) in the closed configuration.

Abstract: The invention relates to a pneumatic booster operated by a plunger (9) housed in a bore (61) and carrying a moving seat (102) intended to interact selectively with a shut-off member (111), this member being itself capable of interacting selectively with a fixed seat (101).According to the invention, the plunger (9) comprises a cylindrical body (91) and a collar (92) sliding between a front stop (911) and a rear stop (912) of the body, an anterior section (921) of the collar (92) being engaged between the cylindrical body (91) and the bore (61), a posterior section (922) of the collar (92) carrying the moving seat (102), and it being possible furthermore for the collar (92) to be held temporarily stationary in the bore independently of the movement of the body (91), by means of a channel (14) and of a snap ring (13), in order to allow extended operation of the booster after a sharp braking action.

Abstract: A disc brake for a motor vehicle including a disc (1), a carrier fixed to the vehicle and inboard (51) and outboard (52) pads. The respective ends (511,512,521,522) of the inboard (51) and outboard (52) pads slide in an upstream branch (21) and a downstream branch (22) of housings (211,221,212,222) of the carrier. Each of the upstream and downstream branches (21,22) of the carrier provides a stop (611,622) to one of the inboard and outboard pads (51,52) however, each of the pads (51,52) only comes into abutment against one of the upstream and downstream branches. The upstream and downstream branches (21,22) being connected to a base (23) different cross-sections and correspondingly different stiffness in a ratio of between 0.80 to 1.25 to resist forces applied to the stop (611,622) without appreciable degradation in the operational performance of the disc brake.

Abstract: A pneumatic brake booster for providing braking assistance. The brake booster has an envelope (10) with an axis of symmetry (X-X') separated sealingly by at least one movable partition (12) to define at least a first chamber (14) connected permanently to a source of low pressure and at least a second chamber (16). The second chamber (16) being selectively connected to the first chamber (14) or a source of high pressure through a three way valve structure actuated by a control rod (30). The control rod (30) being capable of bearing, through the intermediary of a front face of a plunger (28) and a reaction disc (50) with a rear face of a thrust rod (48). The plunger (28) sliding in a bore (26) in the movable partition (12).