Abstract: Methods and systems for determining timing constraint analysis of an integrated circuit (IC) may include defining a sequence of sample points for timing constraint analysis of an n×n matrix, each sample point corresponding to a timing arc of the IC that includes data and reference slews; initially simulating extreme sample points of the matrix, according to the sequence, by substituting timing constraints from liberty files of the IC type for time values of the data slews and conducting a binary search for optimized timing constraints; and interpolating other sample points, according to the sequence, each of the other sample points having a starting bisection point that results from linear interpolation of the timing constraint analysis from adjoining sample points, which were simulated.

Abstract: An emission testing system particularly suited for vehicle emission testing. The system includes at least one research grade non-dispersive infrared (NDIR) unit, a chemiluminescence detector (CLD) unit and a flame ionization detection (FID) unit. All of the analytical units are incorporated in the system for operation with a sample which has been subjected to a single conditioning step. In this manner each analytical unit tests a uniformly conditioned sample. The system is capable of sampling both raw emissions for raw emission idle tests (BAR 90) and dilute volume samples for dilute volume sample mass emission tests under IM-240 regulations.

Abstract: A modulating thermostat for a gas oven includes a body with supply, main and pilot passages. Feeder passages from the supply passage to the main and pilot passages provide a pilot gas flow for a pilot burner and a minimum combustion bypass flow to a main oven burner. The feeder passages are drilled along paths leading from mouths of the main and pilot passages and adjustment sleeves installed at the mouths adjust the gas flows for particular oven and fuel requirements. A temperature modulating valve assembly in the supply passage includes a valve member cooperating with a valve seat in the body to modulate gas flow and maintain an oven temperature set by rotation of a valve stem at the front of the thermostat. The thermostat is calibrated by rotating a sleeve accessible through the hollow stem at the front of the thermostat.

Abstract: A mist generating, self-contained room air humidifier ensures substantially complete evaporation of the mist introduced to an air flow drawn from a room environment prior to discharge back into the room by preferably providing a vertical column extending upwardly from the mist generator to the humidifier outlet and having sufficient height to allow complete evaporation.

Abstract: A humidifier for adding liquid from a mist source to a gas flow improves the evaporation of the liquid by reducing the quantity of larger water droplets from the mist introduced to the gas flow by slowing a diverted portion of the gas flow, routing the gas flow through a partitioned chamber and deflecting the gas flow from direct impact on the mist while catching splattered liquid droplets within the humidifier.

Abstract: A method of warning of the onset of pipe sticking in a rotary drilling operation using a drill string comprising: (a) monitoring the pressure of a drilling fluid being pumped through the drill string during drilling over predetermined periods of time to obtain series of pressure measurements; (b) monitoring the torque required to rotate the drill string during said periods to obtain series of torque measurements; (c) obtaining the skew (third moment) of each series of pressure measurements according to the relationship ##EQU1## wherein N is the number of pressure measurements xi in the series, xmean is the average value of the measurements in the series, and .sigma. is the standard deviation of the measurements in the series; (d) obtaining the normalized standard deviation .sigma.n of the torque measurements in each corresponding series of torque measurements according to the relationship .sigma.n=(.sigma./ymean) wherein .sigma.

Abstract: A method of detecting a fluid influx in a well being drilled with a drill string having a drilling fluid circulated therethrough from a tank via a supply line system connected to the drill string, the method being used while connecting or disconnecting a pipe to or from the drill string and comprising the steps of:a) ceasing circulation of the drilling fluid;b) disconnecting the supply line system from the drill string so as to allow any drilling fluid in the system to flow back into the tank while connecting or disconnecting a pipe;c) reconnecting the supply line to the drill string and recommencing circulation of the fluid;d) while repeating a)-c) during the normal course of drilling the well, monitoring the change in level of fluid in the tank so as to determine a model of the change in level in the tank with respect to time during steps a)-c); ande) comparing the change in tank level observed when subsequently performing steps a)-c) with the change predicted by the model so as to detect a difference there

Abstract: An electrical safety device for use in power tools that is designed to automatically discontinue operation of the power tool upon physical contact of the tool with a concealed conductive material. A step down transformer is used to supply the operating power for a disconnect relay and a reset relay. When physical contact is made between the power tool and the conductive material, an electrical circuit through the disconnect relay is completed and the operation of the power tool is automatically interrupted. Once the contact between the tool and conductive material is broken, the power tool can be quickly and easily reactivated by a reset push button activating the reset relay. A remote reset is provided for convenience and efficiency of operation.

Abstract: In a drill stem test, a packer is set in the well bore to isolate a potential producing zone. A drill pipe with a down hole valve is fitted through the packer. The pipe is usually partially filled with a liquid column prior to commencement of the test, which essentially comprises opening the valve so that formation fluids can flow into the drill pipe and measuring various parameters associated with the fluid transfer. A method for estimating porosity and/or permeability includes the steps of setting up such a drill stem test wherein flow of formation fluid to a drill pipe may be controlled by a down hole valve, opening the valve to establish a flow, recording flow parameters, and analyzing oscillatory transients in the flow to compute therefrom estimates of porosity and permeability.

Abstract: A reclining chair that is disposable adjacent a wall and can recline at the wall. The chair includes a chair frame, a back frame, a seat frame, a platform, and first and second link assemblies. The first link assembly connects the back frame to the seat frame and the chair frame on both sides permitting the back frame to recline and the seat frame to move relative to the back frame forwardly and upwardly. The second link assembly has arms connected to the first link assembly for moving the back, seat and chair frames simultaneously forwardly on the platform a predetermined distance of forward movement along with the arms of the second link assembly, so that the arms of the second link assembly move the same distance forwardly plus an additional distance forwardly as the back frame is being reclined.

Abstract: The chair is preferably of the overstuffed type having a back which is separate from the seat. Brackets are provided on the sides of the seat and back forming a rod-receiving loop therewith. The loops are interconnected by heavy spring rods which permits the removal of the back for compact shipment and which permits the upholstered back to deflect relative to the upholstered seat frame and arms. The seat frame may be supported on a base by a rocking and swiveling mechanism or it may be fixed directly thereto.