An electrostatic charging apparatus in which current reaching an imaging surface from a corona discharge device is automatically regulated. A sensing means is provided to measure the charging current delivered to the imaging surface and means responsive to said measured charging current to adjust the D.C. bias of an A.C. power supply energizing the corona electrode.

There is disclosed an implantable pacer, the characteristics of whose output pulses change automatically after the pacer has generated a predetermined number of pulses. The pacer includes a charge-dependent resistor whose impedance increases in accordance with the total current flow through it. After a predetermined number of pulses have been generated, the impedance increases relatively abruptly. The increase in impedance controls a decrease in the amplitude and/or decrease in the width of subs...

Means for controlling the speed of the secondary of a linear motor, particularly the shuttle of a linear motor powered loom, consists of a series of uniformly spaced markings on the secondary and a sensor responsive to the markings and located adjacent to the linear motor primary. The markings cause the sensor to produce an oscillating output, the frequency of which is dependent on the speed of the secondary. A control signal derived from the sensor output is used to turn off the supply of curre...

A self-adjustable stair construction wherein the treads of the stair are supported by spacers between parallel upper and lower stringers in a truss assemblage. The rise and run and nosing are simultaneously adjusted for each tread with the adjustments being cumulative for each stair flight total run while maintaining the treads level. Each tread is located in a right angle relationship with each spacer. The treads, spacers and stringers are pivotally connected together with an elongated slot for...

The invention comprises an improved concave supporting and adjusting mechanism for axial flow type combine harvesters wherein a supporting frame for the concave has been provided and which is adjustable in height. The concave supporting frame comprises front and rear cross bars disposed below the front and rear edges, respectively of the concave and has ends of crank arms pivotally attached thereto, the other ends of the crank arms being attached to inner ends of respective stub shafts which sha...

Adjusting mechanism for fastening a ski boot to a sole plate. In such a device there is provided a device for gripping one end, normally the heel, of the ski boot and a ratchet for determining the position of the gripping device with respect to the remainder of the sole plate. Same is spring loaded for normal engagement and manually operable for release. The ratchet teeth are oriented for permitting free movement of the gripping device in one direction, normally toward the toe of the ski boot, a...

Apparatus for adjusting the distance between brake blocks carried at the free ends of relatively pivotal stirrups of a rim brake mechanism and pivotal by means of a bowden cable, the apparatus comprising an axially movable adjusting screw in threaded engagement with a freely rotatable sleeve having gear teeth in mesh with the teeth of a rotatable driver. The core of the cable passes through the screw and the latter is fixed to the core cover.

A mechanism for the actuation of an adjusting device such as, for example, a fresh-air flap in a motor vehicle, in which the adjusting member is operatively connected with at least one rotatable lever and the lever cooperates with an actuating member which is displaced along a rectilinear guide path; the actuating member is constructed fork-shaped for the entrainment of the lever and the entrainment takes place by way of a roller, rotatably supported at the lever, which in one end position of th...

Control apparatus has a double-acting hydraulic cylinder and a piston reciprocable in the cylinder in response to application of suitable hydraulic pressures to the piston. The ends of the cylinder are connected to a source of hydraulic pressure by means of two-position valves. The piston is connected to one rod and the cylinder to another rod -- the two rods forming part of a linkage between a gas pedal and a fuel injection pump. An electronic apparatus controls the valves to change the overall...

An automatically adjusting braking device in a band brake for a vehicle for adjusting automatically the gap between the brake drum and lining, and which has an engaging rod projecting from the end of a piston rod, and a feed mechanism provided at the end of the engaging rod, thus a reduction in the braking force due to wearing of the brake lining is prevented.