A micropower electronic motion detector including a sensing element and a source element for measuring the magnitude and direction of the relative motion of the sensing element with respect to the source element. Electronic apparatus for nulling the output signal of the detector and of other electronic sensing apparatus in its initial or static state is also disclosed. The detector may be used in a safety ski binding to measure the forces being exerted on a skier's leg so that a binding release ...

A motion simulator capable of motion in a plurality of degrees of freedom is provided having four variable-centered pulley wheels. Four support lines, one end of each attached to a fixed point and the other end of each attached to a suspended platform, pass over said pulley wheels and an idler arm. Variable-speed power means drive said pulley wheels, imparting a rotating motion thereto about said variable center. Said support lines move with respect to said variable-centered pulley wheels, thus ...

A damping apparatus for retarding motion of a movable body is disclosed. The apparatus has a damper unit with at least two rollers having resilient peripheral surfaces. The rollers are free wheeling relative to one another and roll along a guide in contact with opposite guide surfaces. The damper unit further includes a carrier rotatably carrying the rollers. The carrier is operably connectable to the movable body such that a force is applied to the carrier in response to motion of the body to u...

A motion converter device capable of converting continuous rotary input motion to cyclic linear motion and capable of accomplishing the reversal thereof from cyclic linear motion to continuous rotary motion including means for substantially smoothly obtaining the conversion. The unit includes a set of gear trains having gears of a selected shape and which gear trains are intermeshed from either a single rotary shaft or a plurality of linked output shafts which interwork to convert the rotary mot...

An attachment for objects provides improved safety by affording increased visibility under a wide range of conditions of ambient illumination. The attachment comprises a device mounted on resilient means affixed to an object which can have some independent motion; the motion of the object is transmitted to the device through the resilient means. The device has dark, reflective light-colored, and fluorescent areas. In one embodiment, the dark, reflective light-colored and fluorescent areas are di...

An array of interdigitally related elements are interstitially spaced from one another, with alternate elements in the array connected to a first conductor and the remaining elements in the array connected to a second conductor. A conductive member, such as a metallic ball, is freely movable in two dimensions over the area of the array, electrically coupling and decoupling adjacent elements in the array as it moves. A circuit is connected between the first and second conductors and detects the c...

A detector for a movalbe member such as a rotatable shaft includes a sensor and an alarm having a normal and a signaling condition. The sensor includes one or more magnetic pole pieces attached to the shaft whose rotational speed is to be detected, to rotate in unison therewith, and a pick-up including a coil mounted adjacent the shaft for producing an electrical signal in response to the rotating magnetic pole pieces. An electrical circuit is provided, connected between the coil and the alarm f...

Motion controlling includes a combining network having an acceleration input for receiving an acceleration signal representative of acceleration of a movable element and a position input for receiving a position signal representative of position of the movable element and an output for providing an inferred position signal representative of an inferred position of the movable element. The network includes a first signal processor for processing the acceleration signal to provide modified acceler...

A motion sensor having an outer tubular member closed at both ends thereof and an inner tubular member, concentrically disposed within the outer tubular member, forming therein an inner chamber and with the outer tubular member forming an outer chamber surrounding the inner chamber, the inner tubular member being provided with one or more apertures in walls thereof allowing fluid flow between the inner and outer chambers. A liquid at least partially fills the inner and outer chambers providing a...

A motion simulator having a stationary frame and a movable frame below the stationary frame in the direction of gravity. A passenger car is attached to the bottom surface of the movable free. A driving device is located between the stationary frame and the movable frame and rotationally or linearly moves the movable frame.