Abstract: A zero turning radius mower park brake system includes a park brake pawl on a transmission which engages a park brake to a pair of independently driven traction wheels. A park brake link may be pivotably mounted to the park brake pawl and connected to a left steering lever and a right steering lever. The park brake link may pivot while moving the park brake pawl forward to a park brake engaged position if only one of the steering levers is moved outward from a neutral traction drive position.

Abstract: The present invention relates to inhibitors of histone deacetylases, in particular HDAC8, that are useful for the treatment of cancer and other diseases and disorders, as well as the synthesis and applications of said inhibitors.

Abstract: An optical receiver including a photo detector for converting a light signal into an electrical current signal and a preamplifier circuit for receiving the electrical current signal and outputting a corresponding voltage signal. In one example, the preamplifier circuit includes a first transistor having: (i) a high impedance node connected to an input node connected to receive the electrical current signal from the photo detector, and (ii) a control terminal connected to receive active negative feedback proportional to the electrical current signal received at the input node.

Abstract: An optical receiver including a photo detector for converting a light signal into an electrical current signal and a preamplifier circuit for receiving the electrical current signal and outputting a corresponding voltage signal. In one example, the preamplifier circuit includes a first transistor having: (i) a high impedance node connected to an input node connected to receive the electrical current signal from the photo detector, and (ii) a control terminal connected to receive active negative feedback proportional to the electrical current signal received at the input node.

Abstract: A phase lockedcircuit comprising a phase detector for comparing an incoming serial data signal with a feedback clock signal and generating a digital phase detector output signal representing a phase difference between the incoming data signal and the feedback clock signal; a dual path filter for receiving the phase detector output signal, the dual path filter including a first path for generating a digital proportional output signal that is proportional to the phase detector output signal and a second path having an integral digital filter for generating a digital integral output signal that is proportional to an integral of the phase detector output signal; and a digitally controlled oscillator for receiving the proportional output signal and the integral output signal as tuning inputs and generating in dependence thereon an output clock signal from which the feedback clock signal is obtained. The circuit can be implemented in a receive path of a serializer/deserializer.

Abstract: A sink according to the present invention includes a sink basin having a bottom surface and a top surface with at least one side wall extending therebetween. The sink includes a divider that may be inserted into or removed from an interior area of the sink for selectively dividing the basin into multiple smaller compartments. An electromagnet is positioned beneath the bottom surface of the sink and is attracted to a ferrous material on the bottom of the divider for holding the divider securely when actuated. Channels defined by the sink side wall and other sealing components establish a watertight seal between compartments when the electromagnet is actuated. The electromagnet may be connected to the residential power source and may be activated by a user or, automatically, by a sensor. When the divider is removed, the larger single basin may be used for washing larger items.

Abstract: An anti-collision light for large, commercial aircraft is disclosed. The light is a self-contained unit capable of easy replacement of any anti-collision light currently in use in any large aircraft using an adapter plate and adapter cable directly connected to 115 VAC 400 cycles from the aircraft. The light includes a plurality of round circuit boards with an annular ring of high intensity, surface mounted LEDs, with a disk having an edge configured as an offset half parabolic reflector made up of a plurality of conical facets. Angles of the conical facets are selected such that light from the LEDs is focused into a plurality of discrete planes from each facet, these planes concentrating the light into planar regions of discrete light intensity as required by the FAA. The disks with reflector edges also serve as heat sinks to dissipate heat developed by the LEDs.

Abstract: A phase lockedcircuit comprising a phase detector for comparing an incoming serial data signal with a feedback clock signal and generating a digital phase detector output signal representing a phase difference between the incoming data signal and the feedback clock signal; a dual path filter for receiving the phase detector output signal, the dual path filter including a first path for generating a digital proportional output signal that is proportional to the phase detector output signal and a second path having an integral digital filter for generating a digital integral output signal that is proportional to an integral of the phase detector output signal; and a digitally controlled oscillator for receiving the proportional output signal and the integral output signal as tuning inputs and generating in dependence thereon an output clock signal from which the feedback clock signal is obtained. The circuit can be implemented in a receive path of a serializer/deserializer.

Abstract: A deer stand & gun carrier that includes structures for attaching guns and hunting stands and a bracket for securing the carrier to a carrying rack of an all terrain vehicle.

Abstract: A bias circuit for obtaining accurate on-chip time constants and resistances. The bias circuit includes a constant-g.sub.m bias circuit and feedback loop circuit. The constant-g.sub.m bias circuit has a mos transistor device and a variable resistor device which are arranged so that the trandsconductance of the transistor device is dependent upon the resistance of the resistor device. The constant-g.sub.m bias circuit generates a bias output signal that is a function of the trandsconductance of the transistor device. The feedback loop circuit includes signal generation means responsive to the bias output signal for generating a signal that is a function of the bias signal. The loop circuit further includes a comparison means for comparing the generated signal to a known external frequency reference, and an output that is operatively connected to the variable resistor device for adjusting the value of the variable resistor device until the generated signal matches the external reference signal.

Abstract: A topology for a high speed voltage controlled oscillator (VCO) with quadrature outputs is produced utilizing four inverting differential circuits. The fully differential four stage ring oscillator has outputs from alternate delay circuits combined in balanced exclusive OR gate frequency doublers to provide both in-phase and quadrature output signals at twice the ring oscillator frequency. The period of the quadrature delay signals is four gate delays and is easily realized in the Ghz frequency ranges. The in-phase and quadrature output signals are again combined in a balanced exclusive OR gate frequency doubler to obtain a final output frequency quadruple the ring oscillator frequency.

Abstract: A composite protective laboratory specimen bag (A) and method is illustrated which includes folded tubing (D) having a releasable lock (26) for forming a first fluid-tight compartment (B) for containing a laboratory specimen container. J-folded sheeting (E) with a reverse flip (46) forms a second compartment (C) for containing associated paper work. The tubing and sheeting are heat sealed together across a web (32) of the tubing to form a closed top composite bag with side mouth openings (24,48) for the compartments. A protective plate (62) avoids damage to the lock during the heat sealing step.

Abstract: A voltage controlled oscillator (VCO) is stabilized against variations in output frequency resulting from changes in temperature or the power supply voltage by trimming the voltage controlled oscillator from a second master VCO which is connected into a phase lock loop. Each of the two voltage controlled oscillators has an output frequency which is a function of two inputs. The signal input to one control input of each of the VCO's is the output of the low pass filter in the phase lock loop. The VCO's may both be implemented by cross-coupled NOR gates with grounded capacitor inputs.

Abstract: A switched capacitor type amplifier system including an operational amplifier is provided with compensating capacitive coupling during the non-sampling portion of the cycle from the output of the operational amplifier to its input, to avoid output discontinuities, and to provide compensation for the offset voltage of the operational amplifier. The circuit includes a two phase clock, with the signal input to the input capacitor being alternately sampled and blocked, and the capacitive compensation circuit mentioned above being alternately blocked and connected, respectively, during successive phases of the clock operation. Special circuitry for preventing "clock feed-through" and for implementing a Multiplying Digital to Analog Converter, or MDAC, are disclosed.

Abstract: A device for increasing the muscular strength of certain muscles within the vaginal region of the human body. The device includes means whereby the user is enabled to increase a radial type pressure as an axial withdrawal force is applied to the device by resilient means which are controlled by the user.

Abstract: A composite laboratory specimen bag (A) and method is illustrated which includes folded tubing (D) having a releasable lock (26) for forming a first fluid-tight compartment (B) for containing a laboratory specimen container. J-folded sheeting (E) with a reverse flip (46) forms a second compartment (C) for containing associated paper work. The tubing and sheeting are heat sealed together across a web (32) of the tubing to form a closed top composite bag with side mouth openings (24,48) for the compartments. A protective plate (62) avoids damage to the lock during the heat sealing step.