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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 |
| 7161276 | Self-powered, electronic keyed, multifunction switching system A self-powered switching system using electromechanical generators generates power for activation of a latching relay, switch, solenoid or latch pin. The electromechanical generators comprise electroactive elements that may be mechanically actuated to generate elect... | 01/09/2007 |
| 7126497 | Self-powered switch initiation system A self-powered switching system using electromechanical generators generates power for activation of a latching relay. The electromechanical generators comprise electroactive elements or magnetic based microgenerators that may be mechanically actuated to generate el... | 10/24/2006 |
| 7084529 | Self-powered switch initiation system A self-powered switching device using a prestressed flextensional electroactive member generates a signal for activation of a latching relay. The electroactive member has a piezoelectric element with a convex and a concave face that may be compressed to generate an ... | 08/01/2006 |
| 7075217 | Laminated piezoelectric transformer A laminated piezoelectric transformer is provided using the longitudinal vibration modes for step-up voltage conversion applications. The input portions are polarized to deform in a longitudinal plane and are bonded to an output portion. The deformation of the input... | 07/11/2006 |
| 7019993 | Piezoelectric transformer and modular connections for high power and high voltage power supplies A modular design for combining piezoelectric transformers is provided for high voltage and high power conversion applications. The input portions of individual piezoelectric transformers are driven for a single power supply. This created the vibration and the conver... | 03/28/2006 |
| 6836054 | Thickness mode piezoelectric transducer with resonant drive circuit A thickness mode piezoelectric transducer is provided that has masses attached to opposing faces of the transformer. The end-masses increase the thickness of the transformer and decrease its resonant frequency. The end-masses increase the magnitude of resonant vibra... | 12/28/2004 |
| 6812594 | Self-powered trainable switching network A self-powered switching device using a prestressed flextensional electroactive member generates a signal for activation of a latching relay. The electroactive member has a piezoelectric element with a convex and a concave face that may be compressed to generate an ... | 11/02/2004 |
| 6780369 | Method of finishing plastic concrete mixture A method of finishing concrete using a vibrating tool to consolidate a “dry shake” aggregate into the upper layer of the concrete. The use of the vibrating tool causes moisture within the concrete mass to migrate into the surface layer where the moisture may hyd... | 08/24/2004 |
| 6630894 | Self-powered switching device A self-powered switching device using a prestressed flextensional electroactive member generates a signal for activation of a latching relay. The electroactive member has a piezoelectric element with a convex and a concave face that may be compressed to g... | 10/07/2003 |
| 6617757 | Electro-luminescent backlighting circuit with multilayer piezoelectric transformer The present invention relates to a multilayer piezoelectric transformer that uses a composite resonant vibration mode for step-up voltage conversion. More specifically, a multilayer piezoelectric transformer is provided using radial and shear vibration mo... | 09/09/2003 |
| 6392329 | Piezoelectric vibrating apparatus A piezoelectrically actuated vibratory motor comprises actuators that are mounted "vertically" with their edges attached to top and bottom mounting members. An oscillating voltage applied to the actuators causes them to contract and expand to move the att... | 05/21/2002 |
| 6362559 | Piezoelectric transformer with segmented electrodes A piezoelectric transformer is provided having segmented electrodes on one or both faces of a piezoelectric ceramic disk. Application of a voltage sequentially to one or more adjacent segments forms a travelling wave in the disk. Application of a voltage ... | 03/26/2002 |
| 6346764 | Multilayer piezoelectric transformer A multi-layer piezoelectric transformer (PT) is provided having an insulation layer having an input electroactive ceramic layer bonded to one of its major faces and an output electroactive ceramic layer bonded to its other major face. The input layer is e... | 02/12/2002 |
| 6326718 | Multilayer piezoelectric transformer A multilayer piezoelectric transformer is provided using the longitudinal vibration modes for step-up voltage conversion applications. An input portion polarized to deform in a longitudinal plane is bonded to an output portion. The deformation of the inpu... | 12/04/2001 |
| 6257293 | Apparatus for manufacturing multi-layered high deformation piezoelectric actuators and sensors A method and apparatus for manufacturing prestressed piezoelectric actuators which maximizes output, and increases the precision and efficiency with which the multi-layer actuators are made. Individual layers of the piezoelectric actuators are automatical... | 07/10/2001 |
| 6246153 | Positive feedback resonant transducer circuit A circuit including a transformer, preferably a laminated piezoelectric transducer, in combination with a positive feedback amplifier circuit, capable of serving: 1) to produce either an audible or ultrasonic signal; or 2) as an energy source capable of d... | 06/12/2001 |
| 6245172 | Method and apparatus for manufacturing multi-layered high deformation piezoelectric actuators and sensors A method for manufacturing high deformation piezoelectric actuators and sensors using a continuous tape manufacturing process is provided. The ceramic layer is dispensed between two metal/adhesive layers to form a composite tape and is tack welded togethe... | 06/12/2001 |
| 6229247 | Multi-layer piezoelectric electrical energy transfer device A multi-layered piezoelectric electrical energy transfer device has its input and output sides electrically isolated from each other. As a transformer, the device provides step-down voltage conversion while the output signal preserves the input signal fre... | 05/08/2001 |
| 6215227 | Thickness mode piezoelectric transformer with end-masses A thickness mode piezoelectric transformer is provided that has masses attached to opposing faces of the transformer. The end-masses increase the thickness of the transformer and decrease its resonant frequency. The end-masses increase the magnitude of re... | 04/10/2001 |
| 6213564 | Anti-lock brake system with piezoelectric brake actuator An anti-lock braking system includes a moveable member to be braked and a friction brake for applying a braking force. A controller actuates the friction brake in accordance with braking force demands. Braking force demands are determined by the controlle... | 04/10/2001 |
| 6182340 | Method of manufacturing a co-fired flextensional piezoelectric transformer A method for manufacturing a cofired multi-layer piezoelectric transformer device includes forming first and second green shapes of a sinterable ceramic composition and applying metallization layer therebetween. Upon cofiring, the composite structure comp... | 02/06/2001 |
| 6177185 | Composite concrete structure including an imide layer and method for making same A composite structure is provided which resists corrosion and cracking due to water seepage and roadway use. The composite structure of reinforced concrete is wear resistant through bonding it to a liquid-impermeable overlay such as latex concrete with an... | 01/23/2001 |
| 6158126 | Piezoelectrically actuated shaver A small, lightweight, efficient, quiet electric shaver is provided in which one or more piezoelectric drivers are mechanically coupled to a cutting blade. The cutting action of the blade is generated by the piezoelectric drivers which, when electrically e... | 12/12/2000 |
| 6156145 | Method of manufacturing multi-layered flextensional piezoelectric transducer A method for manufacturing a multi-layer piezoelectric transducer having enhanced mechanical output displacement capability resulting from an increase in the amount of "pre-stress" applied to the electroactive (ceramic) layer by the pre-stress layer. The ... | 12/05/2000 |
| 6150752 | Acoustic transducer with liquid-immersed, pre-stressed piezoelectric actuator in acoustic impedance matched transducer housing A liquid-filled acoustic transducer for finishing an exposed surface of a work medium, such as plastic concrete, transmits acoustic energy generated within an enclosed liquid medium, through a transducer housing member, and into the exterior work medium. ... | 11/21/2000 |
| 6144142 | Multi-layer piezoelectric transformer mounting device A laminated multi-layer piezoelectric transformer comprising two elements joined together with a conductive adhesive and having a bead of the conductive adhesive at the point of junction of the two elements on the exterior surface of the laminated multi-l... | 11/07/2000 |
| 6127771 | Multi-layer piezoelectric transformer mounting device A contact device for securely and reliably attaching electrical leads to a laminated multi-layer piezoelectric transformer and comprising a pair of conductive lead attachment plates, disposed on opposite sides of the laminated multi-layer piezoelectric tr... | 10/03/2000 |
| 6124678 | Fluorescent lamp excitation circuit having a multi-layer piezoelectric acoustic transformer and methods for using the same Fluorescent lamp excitation circuits are provided which use a resonating piezoelectric transformer along with complementary circuit components, to efficiently convert a DC first voltage to a transformer-output AC second voltage. In the preferred embodimen... | 09/26/2000 |
| 6114797 | Ignition circuit with piezoelectric transformer Circuits for use in ignition systems are disclosed which use a resonating piezoelectric transformer along with complementary circuit components, to efficiently convert a DC first voltage to a transformer-output AC second voltage. In the preferred embodime... | 09/05/2000 |
| 6101880 | Feedback-responsive piezoelectric vibrating device A method is disclosed for advantageously modifying the texture or character of a plastic work material by applying acoustic energy at the work material's natural resonant frequency via a transducer assembly including vibrating the transducer assembly in a... | 08/15/2000 |
| 6079214 | Standing wave pump A standing wave pump in which a standing compression wave is produced by a pair of diametrically opposing transducers. The vibrating surfaces of the transducers are oscillated at a frequency sufficient to generate a substantially cylindrical compression w... | 06/27/2000 |
| 6074178 | Piezoelectrically actuated peristaltic pump A peristaltic piezoelectrically actuated fluid pump including two or more pairs of piezoelectric deformable members that are self-actuated, a flexible hose member, a pump chamber, inlet and outlet ports for communicating the pump chamber with the exterior... | 06/13/2000 |
| 6075310 | Acoustic transducer with liquid-immersed, pre-stressed piezoelectric actuator in acoustic impedance matched transducer housing A liquid-filled acoustic transducer for finishing an exposed surface of a work medium, such as plastic concrete, transmits acoustic energy generated within an enclosed liquid medium, through a transducer housing member, and into the exterior work medium. ... | 06/13/2000 |
| 6071088 | Piezoelectrically actuated piston pump A piezoelectrically actuated fluid pump including a pump housing, a pump chamber, inlet and outlet ports for communicating the pump chamber with the exterior of the pump housing, valves for opening and closing the ports, a pre-stressed piezoelectric diaph... | 06/06/2000 |
| 6054796 | Positive feedback resonant transducer circuit A circuit including a transformer, preferably a laminated piezoelectric transducer, in combination with a positive feedback amplifier circuit, capable of serving: 1) to produce either an audible or ultrasonic signal; or 2) as an energy source capable of d... | 04/25/2000 |
| 6052300 | DC-AC converter circuit using resonating multi-layer piezoelectric transformer DC-AC voltage transformation circuits are provided which use a resonating piezoelectric transformer along with complementary circuit components, to efficiently convert a DC first voltage to a transformer-output AC second voltage. In the preferred embodime... | 04/18/2000 |
| 6042345 | Piezoelectrically actuated fluid pumps A piezoelectrically actuated fluid pump including a pump housing, a pump chamber, inlet and outlet ports for communicating the pump chamber with the exterior of the pump housing, valving means for opening and closing the ports, two pre-stressed piezoelect... | 03/28/2000 |
| 6030480 | Method for manufacturing multi-layered high-deformation piezoelectric actuators and sensors A method and apparatus for manufacturing prestressed piezoelectric actuators which maximizes output, and increases the precision and efficiency with which the multi-layer actuators are made. Individual layers of the piezoelectric actuators are automatical... | 02/29/2000 |
| 6004499 | Method of aligning fibrous components of composite materials using opposed oscillating reflectors Standing planar compression waves are used to control the spacing and alignment of previously randomly distributed and randomly oriented loose fibrous elements in a fluid medium. A relatively intense standing planar compression wave comprising the superpo... | 12/21/1999 |
| 5962951 | Regenerative electric driver circuit A vibrating mechanism comprised of piezoelectric elements which vibrate at a high frequency when a voltage is applied to them. The piezoelectric elements are mounted on a rib so that their free ends extend from the rib. When the piezoelectric elements are... | 10/05/1999 |
