Abstract: A stand on mower with multiple cutting units including a front cutting unit positioned behind a pair of front wheels extending laterally outwardly from a vehicle frame, and a pair of rear cutting units positioned behind the front cutting unit and extending laterally outwardly from under the vehicle frame. Each cutting unit is connected to a lift arm that raises and lowers the cutting unit between a mowing position and a transport position. A standing operator platform is positioned between a pair of traction drive wheels behind the pair of rear cutting units, with the platform positioned below the vehicle frame.

Abstract: A mower blade speed control system with an electronic control unit providing engine speed commands to an internal combustion engine having a maximum power speed and a reduced economy speed, and a continuously variable transmission with variable displacement providing rotational power from the engine to a plurality of mower blades. The electronic control unit monitors engine load and automatically adjusts engine speed and the displacement of the continuously variable transmission in response to engine load to achieve a constant rotational speed of a plurality of mower blades at different engine speeds.

Abstract: A mower blade speed control system with an electronic control unit providing engine speed commands to an internal combustion engine having a maximum power speed and a reduced economy speed, and a continuously variable transmission with variable displacement providing rotational power from the engine to a plurality of mower blades. The electronic control unit monitors engine load and automatically adjusts engine speed and the displacement of the continuously variable transmission in response to engine load to achieve a constant rotational speed of a plurality of mower blades at different engine speeds.

Abstract: A method of etching a silicon substrate includes providing a silicon substrate including a first surface and a second surface. A plurality of grooves spaced apart from each other are etched from the first surface of the silicon substrate. A dielectric material is deposited on the first surface of the silicon substrate and into the plurality of grooves. A hole through the silicon substrate is etched from the second surface of the substrate to the dielectric material. A portion of the hole is located between the plurality of grooves.

Abstract: A method of etching a silicon substrate includes providing a silicon substrate including a first surface and a second surface. A plurality of grooves spaced apart from each other are etched from the first surface of the silicon substrate. A dielectric material is deposited on the first surface of the silicon substrate and into the plurality of grooves. A hole through the silicon substrate is etched from the second surface of the substrate to the dielectric material. A portion of the hole is located between the plurality of grooves.

Abstract: A MEMS device includes a silicon substrate. The silicon substrate includes a plurality of dielectric material grooves spaced apart from each other. The silicon substrate also includes a through hole with a portion of the through hole being located between the plurality of dielectric material grooves when viewed from a direction perpendicular to a surface of the silicon substrate.

Abstract: A tractor ground positioning system includes ground positioning controls outside of an operator station of the tractor that can be actuated by an operator while maintaining contact with the tractor to move the tractor forward or reverse to connect an implement. A controller commands the tractor to move at a desired ground speed only while the operator continues actuating the controls.

Abstract: A tractor ground positioning system includes ground positioning controls outside of an operator station of the tractor that can be actuated by an operator while maintaining contact with the tractor to move the tractor forward or reverse to connect an implement. A controller commands the tractor to move at a desired ground speed only while the operator continues actuating the controls.

Abstract: A rockshaft assembly includes a support casting having a pair of journeyed bearings supporting a rockshaft for a three point hitch. A piston is connected to a crank on the rockshaft, and a detachable hydraulic lift cylinder is inserted through an opening in the support casting. The detachable hydraulic lift cylinder has a bore partially inside the support casting and partially outside the casting in which the piston moves.

Abstract: An apparatus and method for simulating a package pressure burst condition for calibrating a package pressure burst detector, where the package pressure burst detector is connected to a pressure tank, and the detector applies an air flow into the tank to gradually increase the tank pressure, and the tank has an output relief conduit connected to a pressure relief valve via a pressure switch, wherein the pressure relief valve is activated for a predetermined time when the pressure switch detects a preset pressure in the tank.

Abstract: A control system for a utility vehicle transmission provides for operator selection of vehicle “aggressiveness,” or rates of acceleration in response to operator command. The aggressiveness of a vehicle's performance can be controlled by modulating control signals to proportional control valves, which determine the transmission acceleration, according to two or more electrical ramp-up (or ramp-down) profiles, in response to an operator's acceleration command (or deceleration command). The transmission control system includes a controller, directional switches and electro-hydraulic valves which control hydraulic pressure in the servo control system of a hydrostatic transmission. The operator is provided with a two-position set switch. With the set switch in the less aggressive position, in response to an operator's command, the software in the controller provides a relatively slow current ramp to energize the control valves.

Abstract: A testing device for measuring leakage from packages, the device having an internal chamber for receiving the package and a cover for sealing the package into the chamber. A gas passage from the chamber to a gas detector carries gas to be measured, and an air passage into the chamber provides a purging passage, and a gas inlet passage though the cover admits gas into the upper part of the chamber.

Abstract: A plug for providing a predetermined flow rate of leakage gas from a sealed package for purposes of calibration of gas measurement instruments, the plug having an axial passage therethrough with a threaded interior wall; and a bolt for threading into the plug axial passage, the bolt having an axial passage therethrough, and an insert for insertion into the bolt axial passage, the insert having a predetermined size opening for permitting only a predictable flow of leakage gas through the plug.

Abstract: An electro-optic modulator array (36). Electrode pairs 50 and 51 are mounted on a substrate (40). A layer of electronic grade glass (60) is deposited by electron beam evaporation on the substrate (40) and electrodes (50) and (51). In an alternate embodiment, an electronic grade of glass 50 is deposited on the PLZT substrate (40) prior to applying electrodes (50) and (51).

Abstract: Described are 1-oxo-substituted and unsubstituted isobutyl-4-ethoxy-benzenes and mixtures thereof with bicyclopentadiene derivatives, wherein the 1-oxo-substituted and unsubstituted isobutyl-4-ethoxy-benzenes are defined according to the structure: ##STR1## wherein Y.sub.1 represents one of the moieties: ##STR2## and wherein the bicyclopentadiene derivatives are defined according to the structure: ##STR3## wherein Z.sub.1 and Z.sub.2 represent hydrogen, C.sub.1 -C.sub.3 lower alkyl or C.sub.2 -C.sub.3 acyl and Z.sub.3 represents methyl or hydrogen with the proviso that Z.sub.1 and Z.sub.2 are not both hydrogen, and uses thereof in augmenting, enhancing or imparting aromas in and to perfume compositions, colognes, perfumed polymers and perfumed articles.

Abstract: Described are 1-oxo-substituted and unsubstituted isobutyl-4-ethoxy-benzenes and mixtures thereof with bicyclopentadiene derivatives, wherein the 1-oxo-substituted and unsubstituted isobutyl-4-ethoxy-benzenes are defined according to the structure: ##STR1## wherein Y.sub.1 represents one of the moieties: ##STR2## and wherein the bicyclopentadiene derivatives are defined according to the structure: ##STR3## wherein Z.sub.1 and Z.sub.2 represent hydrogen, C.sub.1 -C.sub.3 lower alkyl or C.sub.2 -C.sub.3 acyl and Z.sub.3 represents methyl or hydrogen with the proviso that Z.sub.1 and Z.sub.2 are not both hydrogen, and uses thereof in augmenting, enhancing or imparting aromas in and to perfume compositions, colognes, perfumed polymers and perfumed articles.

Abstract: An apparatus for measuring the capacitance of tablets of varying shapes and sizes by conveying the tablets along a curved path which includes a zone of travel between the plates of a capacitive sensing device. The tablets are conveyed in a relatively fixed orientation by constructing a guide channel including a fixedly-positioned curved guide spaced away from a rotatable disk, and wherein a resilient clamp is provided above the guide channel so as to compress the tablet against the rotatable disk during its path of travel.

Abstract: In a microbump flip-chip mounting method, microcircuit features such as conductors and microbumps are formed by a lift off process. A first refractory metal is employed to promote adhesion between a layer of aluminum deposited by physical vapor deposition and a second refractory metal is employed to promote adhesion between the aluminum and an overlying layer of gold.