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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 5335185 | Automatic level control system and method An automatic level control system and method provide continuous proportional control of an inlet valve when the level of material in a storage container is between low and high limits. The system includes a main feedback loop and a nested feedback loop to... | 08/02/1994 |
| 5335166 | Method of operating a sand screw A method of operating a sand screw comprises: sensing speed of a sand screw delivering sand; determining a corrected delivery rate of sand, including converting the sensed speed of the sand screw into the corrected delivery rate of sand in response to pre... | 08/02/1994 |
| 5265247 | Laboratory data storage and retrieval system and method A method for maintaining in a computer memory laboratory test records for a plurality of projects, particularly adapted to projects for cementing oil or gas wells, are disclosed. Records of data identifying the plurality of projects and records of test da... | 11/23/1993 |
| 5252918 | Apparatus and method for electromagnetically detecting the passing of a plug released into a well by a bridge circuit A plug released into an oil or gas well carries one or more metallic strips that affect the inductance of a resistive-inductive bridge circuit mounted adjacent a conduit through which the plug and fluids are pumped into the well. This unbalances the bridg... | 10/12/1993 |
| 5233863 | Fluid loss measuring system and method A fluid loss cell has an outlet through which fluid lost during a fluid loss test flows. This outlet is connected in closed pressure communication with a fluid measuring device that senses the amount of lost fluid received in the device and generates an e... | 08/10/1993 |
| 5221873 | Pressure transducer with quartz crystal of singly rotated cut for increased pressure and temperature operating range A pressure transducer comprises a quartz crystal having an orientation within a range of angles between about -25° and about -45° relative to the Z axis of X, Y and Z crystallographic axes. Such a pressure transducer provides a useful pressure response ... | 06/22/1993 |
| 5205359 | Automatic ball injector apparatus and method An apparatus injects sealing balls into a well in response to closed loop control. The apparatus measures the fluid flow into the well, computes a total amount of fluid which has been introduced into the well, and actuates the release of a sealing ball up... | 04/27/1993 |
| 5204527 | Neutron particle energy detector An apparatus and method utilize a neutron sensitive medium in which initially existing atoms of the medium are divided into particles, reaction energy and neutron energy. The medium undergoes polarization in response to the reaction energy and the neutron... | 04/20/1993 |
| 5202194 | Apparatus and method for providing electrical power in a well A power supply for providing electricity to one or more electrical circuits located downhole in a well comprises a fuel cell adapted to be disposed in the well with the electrical circuit(s). In addition to generating electricity, the fuel cell produces a... | 04/13/1993 |
| 5195861 | Automatic rate matching system An automatic rate matching system is provided such that the delivery of bulk material is matched with the quantity of bulk material required by a process. An optical probe is used which determines the depth of material delivered into a hopper, prior to it... | 03/23/1993 |
| 5187473 | Bipolar signal amplification or generation Amplification or generation of very low (and variable) frequency, low voltage, high current bipolar signals useful in electrical borehole telemetry systems is achieved using a duty cycle control device for causing the alternate direct application of a pos... | 02/16/1993 |
| 5153832 | Self-containing downhole gauge system A self-contained memory gauge includes either semiconductor or magnetic core memory for retaining downhole information related to sampled parameters, such as borehole temperature and pressure. A microprocessor-based computer manages the power utilization ... | 10/06/1992 |
| 5141158 | Eddy current braked spinning jet nozzle A fluid jetting apparatus, such as nozzle, includes a support on which an orifice member is rotatably mounted. Orifices in the member are eccentric so that fluid exiting the orifices gives a driving force to rotate the orifice member relative to the suppo... | 08/25/1992 |
| 5133644 | Multi-pressure compensation of variable displacement pump A variable displacement pump is controlled throughout a broad range of operating conditions between a maximum pressure, low flow rate combination and a minimum pressure, high flow rate combination even when the pump is driven by a power limited prime move... | 07/28/1992 |
| 5114239 | Mixing apparatus and method A mixing apparatus comprises two or more tubs in which mixtures can be mixed to obtain averaging of a particular property, such as density. Two recirculation lines are used. One recirculates between an initial mixing tub and a mixing inlet, and the other ... | 05/19/1992 |
| 5103908 | Method for cementing a well A mixing apparatus comprises two or more tubs in which mixtures can be mixed to obtain averaging of a particular property, such as density. Two recirculation lines are used. One recirculates between an initial mixing tub and a mixing inlet, and the other ... | 04/14/1992 |
| 5102281 | Automatic rate matching system An automatic rate matching system is provided such that the delivery of bulk material is matched with the quantity of bulk material required by a process. An optical probe is used which determines the depth of material delivered into a hopper, prior to it... | 04/07/1992 |
| 5095808 | Sequential remote control plug release system A sequential remote control plug release system allows actuation of plug release plungers and manifold valves associated with a cementing plug container only in a predetermined sequence. With regard to a plug container having two plugs, and thus two plug ... | 03/17/1992 |
| 5083029 | Measuring water content by neutron thermalization A vessel for receiving a test sample of fluid whose water content is to be determined and a thermal neutron sensor are retained in cavities of a biological radioactivity shield. The cavities are lined with a material which blocks external thermal neutrons... | 01/21/1992 |
| 5072404 | Method of tracking fluids flowing along a flow path A method of tracking fluids flowing along a flow path is disclosed. A flow path is initially described corresponding to the flow path geometry which can be subdivided in real time to correspond to actual fluid volumes which are moved through the flow path... | 12/10/1991 |
| 5056600 | Control apparatus and method responsive to a changing stimulus A control system and method utilizing a race between two responses to a changing stimulus are disclosed. An example of a changing stimulus is pressure which increases at a decreasing rate of change during a closed-in period of a drill stem test in an oil ... | 10/15/1991 |
| 5054564 | Well perforating apparatus A perforating gun is designed to have explosive charges spirally disposed around its circumference in accordance with a displacement angle defined as (m/p)(360°), where p is a whole number greater than 4 and m is a whole number greater than 1 but less th... | 10/08/1991 |
| 5046855 | Mixing apparatus A mixing apparatus includes a tub, an agitator disposed in the tub, a flow mixer which provides an initial mixture into the tub, and recirculating means for recirculating mixture from the tub through the flow mixer. In a particular embodiment, the flow mi... | 09/10/1991 |
| 5040603 | Sequential remote control plug release system A sequential remote control plug release system allows actuation of plug release plungers and manifold valves associated with a cementing plug container only in a predetermined sequence. With regard to a plug container having two plugs, and thus two plug ... | 08/20/1991 |
| 5027267 | Automatic mixture control apparatus and method An automatic mixture control apparatus includes a micro-computer-based data acquisition and control device which responds in real time to flowmeter and densimeter signals to control water inlet and bulk cement valves so that a cement slurry is produced at... | 06/25/1991 |
| 5014218 | Using a remote control computer connected to a vocal control computer and a monitor computer A process control system includes a remote control computer connected by two pairs of electrical conductors to a local control computer and a monitor computer. The remote control computer provides a set point from entered control information, the monitor ... | 05/07/1991 |
| 5012151 | Thermally matched strip mounted resonator and related mounting method A resonator assembly comprises a rigid support and a rigid crystal which are rigidly connected along linear segments which have one or more matched thermal characteristics. In a particular embodiment, a thermally matched resonator assembly comprises a Z-c... | 04/30/1991 |
| 5003502 | Digital filter for random variable A digital filter for use with a randomly generated variable, such as in a radioactive densometer, is provided and includes a microprocessor and timing clock for sampling the random variable over a specific time interval. The microprocessor utilizes a weig... | 03/26/1991 |
| 4996872 | Modular core holder A core holder for testing core permeability includes a modular sleeve comprising a series of sleeve segments aligned longitudinally. Port rings positioned between the sleeve segments have radial holes to allow conditions within the core-receiving cavity f... | 03/05/1991 |
| 4990058 | Pumping apparatus and pump control apparatus and method A pumping apparatus comprises a fluid end cylinder carrying a double-acting piston which is reciprocated by a hydraulic servo actuator to provide an expanded flow range ability for metering fluids. The hydraulic servo actuator comprises: a hydraulic cylin... | 02/05/1991 |
| 4961465 | Casing packer shoe A cup type formation packer shoe is provided to be used in well cementing operations for cementing either casing or tubing in existing casing in a well bore. This packer shoe includes packer cups which are forced into sealing engagement with the existing ... | 10/09/1990 |
| 4953097 | Process control system using remote computer and local site control computers for mixing a proppant with a fluid A process control system includes a remote control computer located remotely from where the process is to be performed, and the system includes a monitor computer and a local control computer both located where the process is to be performed. The monitor ... | 08/28/1990 |
| 4936147 | Transducer and sensor apparatus and method A sensor apparatus includes a pressure sensor, a reference device and a temperature sensor collocated within a common environment. The reference device and the temperature sensor are constructed to have temperature response times matched to the temperatur... | 06/26/1990 |
| 4932471 | Downhole tool, including shock absorber In a preferred embodiment, an eletronic temperature gauge is carried into a well bore within a pressure-sealed housing which can free fall through a drill string to impact upon a drill bit connected at the bottom of the drill string. A shock absorber is c... | 06/12/1990 |
| 4918659 | Apparatus and method for adding a selected additive into a mixture A complete additive transport and mixing system is carried on a single vehicle. A collection of liquid additive containers, a collection of metering devices, and a mixing system are all mounted on the vehicle, as is a dry additive metering device. A selec... | 04/17/1990 |
| 4917349 | Valve, and set point pressure controller utilizing the same A set point pressure control circuit is disclosed for controlling pressure in a high pressure environment. The circuit includes a high pressure communicating, low pressure actuated valve. The valve includes a housing in which a valve member is disposed. T... | 04/17/1990 |
| 4886367 | Apparatus for adding a selected additive into a mixture A complete additive transport and mixing system is carried on a single vehicle. A collection of liquid additive containers, a collection of metering devices, and a mixing system are all mounted on the vehicle, as is a dry additive metering device. A selec... | 12/12/1989 |
| 4873648 | Watercut monitor device and method A watercut monitor device has an oscillator circuit which generates an analog input signal in response to the capacitance of a capacitance probe through which an oil and water emulsion flows. The frequency of the analog input signal is non-linearly relate... | 10/10/1989 |
