A position indicator includes a time-constant circuit having an element whose characteristic continuously varies in response to operation represented as a continuous quantity such as writing force, and capable of switching the variation range of time constant in response to the variation in characteristic of the element in at least two ways; and a discharging/charging device capable of discharging the time-constant circuit from a predetermined voltage to a voltage below a specified voltage, or c...

A position regulator is provided which is effective to control, via a control unit, a pressure medium circuit to operate at different working pressures. The regulator comprises two or more pressure transmitting elements which divide an internal space into a number of pressure chambers, the pressure transmitting elements being arranged for axial movement within the position regulator. The invention provides pressure transmitting elements defining the pressure chambers which comprise diaphragms or...

A graphical input tablet is described which is made up of layers of flexible material. The edges of planar conductors on the surfaces of the layers divide the layers into zones, with each layer having a unique combination of zones. When a point is indicated on the writing area of the tablet by applying pressure thereto, conductors on facing surfaces of the adjacent layers make contact and the contacts made are indicative of the position of the point.

A device for infinitely controlling the position of a controlled member along its axis of movement. The device includes hydraulic actuators coaxially secured to the controlled member and a mechanically and/or manually actuated cylinder is fluidly connected to the hydraulic actuator so that by actuation of the cylinder, both the speed and the position of the controlled member along its axis of movement can be carefully controlled.

A transformerless capacitance detection device for picofarad level capacitances, used in a galvanometer for position feedback. A variable capacitor is connected between transistor emitter and ground with a ground-referenced oscillating voltage source connected directly to base and a capacitor discharge means connected to the emitter. Oscillating voltage appears across the capacitor via the transistor base; the capacitor is charged through the transistor while the transistor is conducting and is ...

A glass sheet is advanced into a sheet determining position with one side of the sheet intercepting two scan paths and the other adjacent side of the sheet intercepting one of the two scan paths. Light rays reflected from the portion of the scan paths occupied by the sheet are incident on selected photodetectors which generate a plurality of signals. The signals are acted on to determine orientation of the sheet relative to a reference plane. The information is forwarded to the program of an ind...

A position indicator of potentiometer type includes two parallel wires, each having first and second ends, and a movable, rotatable contact cylinder around which the wires pass round at least one turn. The potential contact is made via the first end of a first wire and the second end of a second wire, whereas the potentiometer current is arranged, when in use, via a second end of said first wire and a first end of said second wire, the two being coupled through the contact cylinder.

A displacer body is linked to a position transmitter of an analogue signal through an elastomeric body mounted in the wall of the vessel in which the displacement takes place.

A position indicator is arranged for detecting and indicating the position of a member that is movable along a predetermined path in discrete steps as part of the diaphragm of a still camera. Elements that can produce an electrostatic field and can scan an electrostatic field are alternatively arranged so that a single one of the elements moves with the diaphragm member along a path past a plurality of the other elements positioned along the path. The scanning elements are arranged to operate a ...

A pressure altitude signal actuates a servomotor coupled through a gear train to an altimeter that includes a rotational shaft for repositioning an aneroid pickoff. Mounted on the rotational shaft is an encoding disc with seven code formations supported on one face of the disc. Each code formation has a generally circular configuration with the various formations juxtapositioned. Six brush pickoffs respond to the six outermost code formations to provide pulse trains related to altitude pressure....