A telephone line hold and hold release circuit which, after a central office line which is connected to at least two telephone sets in a telephone terminal system has been seized in response to an incoming call and then placed on HOLD, releases that central office line from the HOLD condition in response to either (i) the re-closing of the hookswitch of the telephone set which seized the central office line, or (ii) the closing of the hookswitch of another telephone set connected to that central...

A vehicle hill hold may be accomplished, for a vehicle having an automated clutch between the engine output and the transmission input, while protecting the clutch from potential excess wear due to overheating. A hill hold may be accomplished by increasing an accelerator pedal position sensitivity and switching the clutch between fully engaged and fully disengaged based on changes in the pedal position.

Methods and apparatus are presented for implementing an improved Control-Hold Mode that reduces the load of the reverse link and reduces the battery consumption of remote stations. While a remote station is in the improved Control-Hold Mode, the circuitry that monitors the forward packet data channels and the associated control channels are turned off. Since the forward packet data channels and their associated control channels are not monitored, the operations of the reverse channels can be gat...

A selectively rotatable climbing hold removeably attached to the front face of a climbing wall with a quick connect fastener system. The climbing hold includes a first component and a second component. The first component or the second component includes a shaft, and the other one of the first component or the second component includes a bore, and the shaft is positioned within the bore to releasably secure the climbing hold to the climbing wall. The shaft may further include a portion having a ...

A resilient hold-down strap for retaining one or more capacitors in position against a housing wall includes substantially rigid end brackets integrally attached to an intermediate strap portion which is elastically extensible. Thickened ends of the intermediate strap portions are securely attached to the end brackets, or unitarily formed therewith, to form a unitary strap member. Holes are provided in the end brackets for fasteners to pass into or through the housing wall so that the capacitor ...

A hill hold apparatus and operating strategy for an electric or hybrid electric vehicle is disclosed. The apparatus includes a three-phase machine that is coupled to drive wheels. The machine is powered by a pulse width modulated inverter having at least a first half-bridge coupled to a first machine phase, a second half-bridge coupled to a second machine phase, and a third half-bridge coupled to a third machine phase. The operating strategy employs predetermined switching modes to minimize and ...

A sample-and-hold circuit has an impedance converter, a first switch, an amplifier, an input circuit for receiving an input signal and supplying an output signal corresponding to the input signal to the amplifier, through the impedance converter and the first switching means, output-holding capacitor coupled between the input and output terminals of the amplifier, and a feedback circuit coupled between the output terminal of the amplifier and the input terminal of the impedance converter. The in...

A mechanism of the hold-down type is provided which permits a predetermined load to be applied to a unit, e.g. an avionics box, secured upon a structure, while also permitting insertion and extraction of that unit through operation of the mechanism. The mechanism is particularly adapted for use in relatively confined areas. It includes a hook (70) which is mounted to the unit itself, and a housing (20) which is constructed for releaseable engagement with the hook (70) and which houses the clutch...

The invention relates to a sample-and-hold circuit arrangement comprising a differential amplifier (5) followed by an inverting amplifier (8). In accordance with the invention there is provided a third amplifier (12) and a capacitor (14) which connects an output of the third amplifier to its input. The inverting amplifier (8) ensures that the voltage on the output (16) of the arrangement is independent of the offset voltage of the differential amplifier (5). Moreover, the capacitor (14) maintain...

A locking device is provided for holding an aircraft door in an open position. The device includes a first member connected to the door which moves in correspondence with door opening and closing. A second member of the device is fixedly connected to aircraft structure that supports the door. A locking pin, connected to the first member, is engaged with a pin receiving opening in the second member when the door is fully open to hold the door in such position. The pin is movable axially by a manu...