Abstract: A variable reactance tuning circuit includes a variable capacitance diode (2) having a first terminal coupled to a ground reference potential line (5) and a second terminal coupled, via a bias resistor (4) to a control voltage supply line (3). Nodes (6 and 7), coupled to the first and second terminals of the variable capacitance diode (2), provide active and ground reference inputs to a tunable circuit such as an oscillator circuit or a filter circuit (not shown). A diode (8) is coupled in parallel with the bias resistor (4) so that the anode of the diode (8) is coupled to the control voltage supply line (3) and the cathode is coupled to the active node (6). By providing rectification of the control voltage at the active node (6) at all times, the average voltage at the active node (6) can be allowed to exceed the control voltage so that there can be more voltage pumping at higher voltages for a given circulating current.

Abstract: A coin handling system comprises a coin-driving member having a resilient surface and a stationary coin-guiding member having a coin-guiding surface opposing the resilient surface of the coin-driving member. The coin-guiding surface is positioned generally parallel to the resilient surface and spaced slightly therefrom. The resilient surface of the coin-driving member moves coins along the coin-guiding surface of the coin-guiding member. The coin handling system uses a lubrication distribution system to reduce friction between the coins and the coin-guiding surface of the coin-guiding member. The lubrication distribution system includes at least one cavity formed in the coin-guiding surface of the coin-guiding member. A reservoir stores a lubrication fluid, and a supply tubing is used to convey the lubrication fluid from the reservoir to the cavity. A control system regulates the flow of the lubrication fluid from the reservoir to the cavity via the supply tubing.

Abstract: This invention is directed to a shredding machine utilizing a lubrication process to increase the shredding capacity and service life of the machine. More specifically, the invention discloses a distribution manifold containing a plurality of uniformly dispersed pores which discharge fluid across the cutting elements of the shredding machine in a precise and even manner. The pore diameter and length can be chosen to provide for variable fluid discharge rates. Additionally, this invention relates to a lubrication discharge system which utilizes an actuating means that controls the discharge intervals over which the porous manifold releases the fluid. Provisions are included which allow for the lubrication discharge system to operate by use of a pump, or by the mere force of gravity in combination with a control valve.

Abstract: A coin handling device for handling a plurality of coins comprises a coin-driving member having a resilient surface and a stationary coin-guiding member having a coin-guiding surface opposing the resilient surface of the coin-driving member. The coin-guiding surface is positioned generally parallel to the resilient surface and spaced slightly therefrom. The resilient surface of the coin-driving member is constructed and arranged to move the coins along the coin-guiding surface of the coin-guiding member. The coin-guiding member includes lubricant-filled cavities, self-lubricating inserts, or a gall-resistant coating to reduce friction between the coins and the coin-guiding surface of the coin-guiding member.