Abstract: Disclosed is a device for placing a phoropter head in a horizontal position in order to optimize the measurement of the visual acuity of a patient, and to a method for placing a phoropter head in a horizontal position. The device and method help performing a correct measurement of a patient's visual acuity by allowing the fine adjustment of the phoropter head horizontality and alerting when its position is not correct.

Abstract: Disclosed is a device for placing a phoropter head in a horizontal position in order to optimize the measurement of the visual acuity of a patient, and to a method for placing a phoropter head in a horizontal position. The device and method help performing a correct measurement of a patient's visual acuity by allowing the fine adjustment of the phoropter head horizontality and alerting when its position is not correct.

Abstract: An optometry device for testing an individual's eye includes: a casing; an imaging module located in the casing and adapted to produce a light beam directed to the individual's eye; and a refraction module adapted to provide a variable optical correction to the individual's eye looking there through into the casing. The optometry device includes an illumination system adapted to produce a variable ambient light level inside the casing.

Abstract: Vehicle seat fixed to the floor of a cabin of a vehicle and which is able to absorb the impact of a passenger seated behind. It comprises at least two uprights (20) per backrest, these being positioned substantially vertically and engaged via a lower end (30) in the fixed framework (32) of the seat in such a way as to be releasable through upward translational movement so that they can disengage upward under the effect of an impact on a rear face, and are mounted with the ability to rotate about at least one fixed axis of the fixed framework (32) so as to be able to pivot forwards after becoming disengaged. At least one deliberate mechanical weak link positioned between each upright (20) and the framework (32) blocks the translational movement of the upright below a determined force corresponding to the impact. Application to aircraft seats.

Abstract: The invention relates to a vehicle seat, preferably multiple-seater, which is deformable at the centre thereof and makes it possible to respond to deformation stresses in the event of an accident, impact or crash. In the case of a three-seater seat, the seat is primarily formed by four legs (10), a central seat portion (12), two end seat portions (11) and three backrests (13). The seat portions are bordered by two side bars (18) and one front bar and one rear bar. The front and rear bars are each formed by a central bar (14) or (16) which is extremely flexible, while the end bars (15, 17) of the end seats (11) are extremely rigid. The invention can also be used in aircraft seats.

Abstract: An optometry device for testing an individual's eye includes: a casing; an imaging module located in the casing and adapted to produce a light beam directed to the individual's eye; and a refraction module adapted to provide a variable optical correction to the individual's eye looking there through into the casing. The optometry device includes an illumination system adapted to produce a variable ambient light level inside the casing.

Abstract: Vehicle seat fixed to the floor of a cabin of a vehicle and which is able to absorb the impact of a passenger seated behind. It comprises at least two uprights (20) per backrest, these being positioned substantially vertically and engaged via a lower end (30) in the fixed framework (32) of the seat in such a way as to be releasable through upward translational movement so that they can disengage upward under the effect of an impact on a rear face, and are mounted with the ability to rotate about at least one fixed axis of the fixed framework (32) so as to be able to pivot forwards after becoming disengaged. At least one deliberate mechanical weak link positioned between each upright (20) and the framework (32) blocks the translational movement of the upright below a determined force corresponding to the impact. Application to aircraft seats.

Abstract: A refractor (100) includes: an enclosure having a front face containing a first optical window and a back face containing a second optical window aligned with the first optical window along an optical axis of observation; and at least one vision compensating device making it possible to observe along the optical axis of observation. The vision compensating device includes, between the first window and the second window, a first optical element having a spherical power along the optical axis, the spherical power being variable. The enclosure is mounted on an orientable holder (104) that is rotatable relative to a stationary portion (102) about a horizontal axis (H). A method for measuring refraction employing such a refractor is also disclosed.

Abstract: The elastic immobilizing device allows a passenger on a seat, positioned behind the seat carrying the tray and the device according to the invention, to use the tray (3) in an easy and practical manner and to avoid accidental breakage of the strap (17) which holds the tray (3), if the strap (17) is pulled accidentally or excessively. The strap (4) holding the tray (3) comprises a part that has low resistance to stretching (17) along the entire length thereof and comprises, along at least a part of the length thereof, a part that is highly resistant to stretching (18), mounted in series or in parallel with the part that has low resistance to stretching (17), the part that is highly resistant to stretching (18) being able to come into action when the part that has low resistance to stretching (17) has been stretched. Application to the seats of aircraft.

Abstract: The invention relates to vision compensating spectacles comprising means of support (130, 140, 152) on a wearer's face and at least one optical subassembly (110, 120) mounted on the support means (130, 140, 152) opposite at least one of the wearer's eyes. The optical subassembly (110, 120) comprises three optical elements mounted on the support means in series along an optical axis: a first optical element of cylindrical power for a direction of gaze of the wearer along the optical axis, a second optical element of cylindrical power for the said direction of gaze and a third optical element of variable spherical power for the said direction of gaze. The first optical element and the second optical element are adjustable in rotation about the optical axis independently of one another.

Abstract: A device for locking a folding element in position for a vehicle seat including: a fixed element, designed to be fixed to the vehicle seat, a rotating element, designed to be fixed to the folding element, installed free to rotate relative to the fixed element about a rotation axis (X), the rotating element comprising at least a first locking structure, and a locking element, installed on the fixed element and that can be moved between a locking position in which it locks the rotating element in rotation relative to the fixed element by at least partial engagement of the locking element in the at least one first locking structure of the rotating element, and a release position in which it allows free rotation of the rotating element from the fixed element by release of the locking element in the at least one first locking structure of the rotating element.

Abstract: The invention relates to a vehicle seat, preferably multiple-seater, which is deformable at the centre thereof and makes it possible to respond to deformation stresses in the event of an accident, impact or crash. In the case of a three-seater seat, the seat is primarily formed by four legs (10), a central seat portion (12), two end seat portions (11) and three backrests (13). The seat portions are bordered by two side bars (18) and one front bar and one rear bar. The front and rear bars are each formed by a central bar (14) or (16) which is extremely flexible, while the end bars (15, 17) of the end seats (11) are extremely rigid. The invention can also be used in aircraft seats.

Abstract: The transport vehicle seat allows to avoid the violent collision of a passenger's head located on the seat placed behind and to dampen the violent forward rocking of this passenger, in case of a frontal collision of the transport vehicle. The seat includes a pivotably mounted fold-down element (10), such as a table, placed on the rear face of a seat back. It has blocking part (14) holding the fold-down element (10) in a substantially vertical position, blocking part (14) being able to break off during a collision applied to the fold-down element (10) and to allow the latter to go on rocking towards the back seat to which it is attached. Application to aircraft seats.

Abstract: The vehicle seat back according to the invention includes a textile assembly (30) having at least one embrittled linear zone (32, 32A, 32B) able to tear during an impact of the head of a passenger located on the seat behind the seat back considered, so as to enable rocking of this passenger's head to be continued and, at the same time, to be slowed down. Application to aircraft seats.

Abstract: A vehicle seat for a passenger, comprising a backrest having a front face directed towards the passenger and a rear face opposite the front face, and a seat part having an upper face directed towards the passenger and a lower face opposite the upper face, wherein the rear face of the backrest and/or the lower face of the seat part comprise(s) at least one area that is deformable in the event of an impact, towards the front face of the backrest and/or towards the upper face of the seat part respectively, and in that the front face and rear face of the backrest, and/or the upper face and lower face of the seat part are located at a distance from each other, at least at said at least one deformable area, so as to define a clearance space, said at least one deformable area of the rear face of the backrest and/or of the lower face of the seat part being configured so as to deform into the clearance space in the event of an impact on the rear face of the backrest and/or the lower face of the seat part, without tran

Abstract: The elastic immobilizing device allows a passenger on a seat, positioned behind the seat carrying the tray and the device according to the invention, to use the tray (3) in an easy and practical manner and to avoid accidental breakage of the strap (17) which holds the tray (3), if the strap (17) is pulled accidentally or excessively. The strap (4) holding the tray (3) comprises a part that has low resistance to stretching (17) along the entire length thereof and comprises, along at least a part of the length thereof, a part that is highly resistant to stretching (18), mounted in series or in parallel with the part that has low resistance to stretching (17), the part that is highly resistant to stretching (18) being able to come into action when the part that has low resistance to stretching (17) has been stretched. Application to the seats of aircraft.

Abstract: The invention relates to vision compensating spectacles comprising means of support (130, 140, 152) on a wearer's face and at least one optical subassembly (110, 120) mounted on the support means (130, 140, 152) opposite at least one of the wearer's eyes. The optical subassembly (110, 120) comprises three optical elements mounted on the support means in series along an optical axis: a first optical element of cylindrical power for a direction of gaze of the wearer along the optical axis, a second optical element of cylindrical power for the said direction of gaze and a third optical element of variable spherical power for the said direction of gaze. The first optical element and the second optical element are adjustable in rotation about the optical axis independently of one another.

Abstract: A refractor (100) includes: an enclosure having a front face containing a first optical window and a back face containing a second optical window aligned with the first optical window along an optical axis of observation; and at least one vision compensating device making it possible to observe along the optical axis of observation. The vision compensating device includes, between the first window and the second window, a first optical element having a spherical power along the optical axis, the spherical power being variable. The enclosure is mounted on an orientable holder (104) that is rotatable relative to a stationary portion (102) about a horizontal axis (H). A method for measuring refraction employing such a refractor is also disclosed.

Abstract: A device for locking a folding element in position for a vehicle seat including: a fixed element, designed to be fixed to the vehicle seat, a rotating element, designed to be fixed to the folding element, installed free to rotate relative to the fixed element about a rotation axis (X), the rotating element comprising at least a first locking structure, and a locking element, installed on the fixed element and that can be moved between a locking position in which it locks the rotating element in rotation relative to the fixed element by at least partial engagement of the locking element in the at least one first locking structure of the rotating element, and a release position in which it allows free rotation of the rotating element from the fixed element by release of the locking element in the at least one first locking structure of the rotating element.

Abstract: A seat for an airplane is provided that makes it possible to absorb, in the event of a frontal impact of the airplane, the rocking to which a passenger in a seat located behind the seat is subjected. The backrest of the seat is provided with a reinforcing strip placed behind the backrest. The seat portion can also be provided with a second reinforcing strip placed under the seat portion. The reinforcing strip includes knitted or woven textile. In the case of knitting, the yarn used has a high tenacity, and the knitting stitch can advantageously be the Jersey stitch. In the case of weaving, the weft and warp threads have approximately the same tenacity.