Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7361966 | Actuator chip for inkjet printhead with electrostatic discharge protection An inkjet printhead chip includes electrostatic discharge (ESD) circuits to protect the chip during ESD events, including one preventing a thin dielectric layer on a substrate from breakdown. In one embodiment, the chip includes an ESD circuit essentially dedicated ... | 04/22/2008 |
| 7358649 | Small piezoelectric air pumps with unobstructed airflow A T-shaped blade, or one or more hollow tubes, are vibrationally excited by one or more piezoelectric elements to generate an airflow from a free end of the blade or tube(s). The airflow may be directed to, or drawn away from, an electronic component to cool the ele... | 04/15/2008 |
| 7255410 | Ink jet recording apparatus An ink jet recording apparatus, having a control circuit for controlling the driving of a recording head and a driver circuit for driving the recording head, includes an AC/DC converting circuit for converting an input AC voltage into a first DC voltage to then supp... | 08/14/2007 |
| 7037010 | Thermal printer The thermal printer of the invention comprises a frame, a print head tiltably mounted in the frame, and a spring carried by the frame and forming a member for urging the print head into its printing position, with a flexible sheet of conductors terminating at the pr... | 05/02/2006 |
| 6930435 | Piezoelectric element A piezoelectric element for actuating a mechanical component, is proposed in which, with a multilayer structure of piezoelectric layers, the inner electrodes disposed between them can be subjected to an electrical voltage. Since the piezoelectric layers with the inn... | 08/16/2005 |
| 6779441 | Automatic metal printer Disclosed is an automatic metal printer which prints a camera-photographed and computer-processed image on a surface of a hard material, such as a metal sheet, through a dot matrix printing type method wherein brightness of the printed image is expressed in accordan... | 08/24/2004 |
| 6733195 | Head drive circuit for impact dot printer In a head drive circuit for an impact dot printer which performs printing by driving a print wire, a DC power source supplies a power source voltage. A switching element is on/off controlled to apply the power source voltage to a head coil for a predetermined time p... | 05/11/2004 |
| 6331037 | Drive arrangement for a writing head A drive arrangement, for example for a writing head, comprising a piezoelectrically actuated lever arrangement (1d) for moving a writing tip (21) in the direction of a recording medium when writing on the recording medium. This drive arrangement is charac... | 12/18/2001 |
| 5479064 | Piezoelectric actuator with a displacement enlarging feature A piezoelectric actuator has a housing having a top portion with an opening. A Y-shaped member comprising a bottom arm and divided two top arms. The bottom arm is fixed on a bottom portion of the housing and the divided two top arms are placed in a movabl... | 12/26/1995 |
| 5447381 | Piezoelectric printing head A piezoelectric printing head includes an annular base frame and a plurality of piezoelectric actuator assemblies mounted on the base frame. Each actuator assembly includes a piezoelectric element having one end rigidly secured to the base frame and anoth... | 09/05/1995 |
| 5423618 | Piezoelectric print head control device using adjacent dot data The present invention provides a print head control device for a wire dot printer, capable of preventing the occurrence of ghost dots to enable the wire dot printer to print characters and the like with a high print quality. The print head control device ... | 06/13/1995 |
| 5413421 | Printing head device A printing head device according to the present invention includes a plurality of printing pins corresponding to respective dots, a plurality of first pin drive plates having the printing pins fixed thereon and having surfaces on which first electrodes ar... | 05/09/1995 |
| 5399032 | Print head having replaceable print elements for wire dot-matrix printer A print head for a wire dot-matrix printer includes an element base, and a plurality of print elements engaged with and supported by the element base. Each of the print elements includes a print wire, an actuator moving the print wire, and a base supporti... | 03/21/1995 |
| 5331241 | Electro-strictive actuator An electro-strictive actuator includes an electro-strictive element having a first surface through which a mechanical displacement is output. A mechanical member has a second surface which directly contacts the first surface so that the mechanical displac... | 07/19/1994 |
| 5326180 | Arranging structure of print wire driving units utilized in a dot impact print head An arranging structure of print wire driving units in print head utilized in a shuttle printer is disclosed. In such structure, a plurality of head units U each of which comprises the row R1 and the row R2 of the print wire driving units 10a, 10b, are arr... | 07/05/1994 |
| 5292201 | Printing head of wire-dot impact printer A printing head including a plurality of impact printing wires constituting a dot matrix and a plurality of actuators for respectively and selectively driving the printing wires. Each actuator is constituted of a movable member to which the printing wire ... | 03/08/1994 |
| 5213424 | Piezoelectric actuator device A piezoelectric actuator device for use in a printing machine and comprising a laminated piezoelectric element sandwiched between first and second blocks, and first and second leaf springs attached to upper and lower surfaces of the first and second block... | 05/25/1993 |
| 5214341 | Piezoelectric acutator device with vibration absorbing means A piezoelectric actuator device adapted for use in a printing machine and comprising a piezoelectric assembly and a movement magnifying mechanism for magnifying the movement of the piezoelectric assembly and for transferring the magnified movement to the ... | 05/25/1993 |
| 5207518 | Piezoelectric printer A piezoelectric printer including a piezoelectric actuator having piezoelectric elements for driving printing elements. A drive voltage applied to the piezoelectric elements for printing operations fluctuates with a predetermined period and amplitude. The... | 05/04/1993 |
| 5205658 | Print gap detecting device in print head Piezoelectric elements that can resonate at a certain frequency with a coil are extended and contracted as they are repeatedly charged and discharged. The extending and contracting movements of the piezoelectric elements are amplified and transmitted to m... | 04/27/1993 |
| 5200764 | Print head assembly for use in an ultrasonic printer The present invention relates to a print head assembly for use in an ultrasonic printer. The print head assembly comprises at least one print head which is slidably mounted in a block which is slidably secured in the ultrasonic printer. Each print head co... | 04/06/1993 |
| 5193922 | Serial printer A serial printer for printing recording paper has a printing head movable at a right angle with respect to the feeding direction of the recording paper. Vibration applying means, such as a piezoelectric element, is mounted on the outer circumference of th... | 03/16/1993 |
| 5190383 | Dot printing apparatus A dot printing apparatus in which the piezoelectric print head having the piezoelectric element connected to the printing wire is utilized and the secondary bounce of the printing wire is effectively controlled according to one of three dot printing modes... | 03/02/1993 |
| 5184901 | Displacement magnifying mechanism for a print element A displacement magnifying mechanism includes a base member and an electro actuator having a free ene and a base end connected to the base member, and having an actuator axis defined as passing through the free end and the base ene. The electro actuator ha... | 02/09/1993 |
| 5167458 | Wire driving mechanism A wire driving mechanism for a wire-dot print head employs a piezoelectric element or a magnetostrictive element as a driver (5). To enable printing with a satisfactorily high print quality, the wire driving mechanism employs the extensional force of the ... | 12/01/1992 |
| 5167459 | Apparatus for driving printing head of wire-dot impact printer An apparatus for driving a printing head of a wire-dot printer, the head including a plurality of electroexpansive elements for driving respective printing wires cooperatively constituting a wire-dot matrix and in accordance with print pattern data design... | 12/01/1992 |
| 5165807 | Printing head having a distortion element Front ends of the frames of a plurality of print units can be supported by a support member. At the rear end of each frame a fitting member having screw holes is attached. A fixing member is provided on the back side of the fitting members. Screws are ins... | 11/24/1992 |
| 5165809 | Piezoelectric actuator and print head using the actuator, having means for increasing durability of laminar piezoelectric driver An actuator for operating a desired driven member, including a laminar transverse-effect type piezoelectric driver having laminated piezoelectric elements which are displaced upon application of a voltage thereto in the direction of lamination. The actuat... | 11/24/1992 |
| 5147141 | Driver circuit for piezoelectric actuator, and dot-matrix head and printer using piezoelectric or other actuator having discharge control means A driver circuit for driving a piezoelectric element, including a charging circuit having a DC power source and a coil for charging the piezoelectric element, and a discharging circuit for discharging the piezoelectric element. When the piezoelectric elem... | 09/15/1992 |
| 5133612 | Dot impact type printing head with adhesively attached base unit In a print head of a dot matrix printer, support frames carrying the piezoelectric elements of the print wires are seated in and bonded to a base unit to provide a rigid, unitary printing structure. The base unit has projections extending therefrom which ... | 07/28/1992 |
| 5092689 | Piezoelectric driver of wire-dot impact printer A printing head includes a plurality of printing members constituting a dot matrix, and a plurality of actuators for driving the printing members, respectively. Each of the actuators comprises a resiliently movable member having one end to which the print... | 03/03/1992 |
| 5046872 | Printer actuated by piezoelectrically generated shock wave An impact printer is described which includes a shock wave generator means, a print hammer, and a solid wave guide interposed between the shock wave generator and print hammer. The solid wave guide acts to transmit a shock wave from the shock wave generat... | 09/10/1991 |
| 5037217 | Dot-matrix impact printer using piezoelectric elements for activating print wires A dot-matrix impact printer, including a print head including a piezoelectric element, and a print wire which is movable from a non-operated position thereof to an operated position thereof, owing to displacement of the piezoelectric element, to produce a... | 08/06/1991 |
| 5033883 | Variably-controlled electromagnetically driven printer Dot-matrix printer for printing on a paper resting against a platen includes a bendable piezoelectric lamina which is supported along a first edge planar ferromagnetic member which is operatively connected to the bendable piezoelectric lamina at a region ... | 07/23/1991 |
| 5005994 | Printing head of wire-dot impact printer A printing head includes a plurality of impact printing wires constituting a dot matrix and a plurality of actuators respectively corresponding to, and for selectively driving the printing members. Each actuator comprises a movable member to which a print... | 04/09/1991 |
| 4976553 | Very small displacement enlargement mechanism and printing head using the same A very small displacement enlargement mechanism is disclosed, in which a first stationary frame and a second movable frame are disposed on the opposite sides of a piezoelectric element for producing a strain in a longitudinal direction according to an app... | 12/11/1990 |
| 4944222 | Printer device with noise reducing impact hammer Printer device in which a striking movement is imparted to a striking member (6) for transmitting a print (5) via an ink ribbon (3) to a paper (2) or the like bearing against an abutment (1). The striking movement of the striking member (6) is effected by... | 07/31/1990 |
| 4929100 | Taut band piezoelectric actuator for wire matrix printing elements This invention relates to printing elements for use in a serial wire matrix printer having a plurality of driven wire printing elements. Each printing element has actuating means associated therewith to drive the elements against a ribbon from a retracted... | 05/29/1990 |
| 4886380 | Piezoelectric controlled electromagnetically driven printing Dot-matrix printer for printing on a paper resting against a platen includes a bendable piezoelectric lamina, means for fixedly supporting the bendable piezoelectric lamina along a first edge, a planar rerromagnetic member, means for operatively connectin... | 12/12/1989 |
| 4886382 | Printing hammer comprising two hinge parts coupling an arm to a base member on both sides of a hinge coupling the arm to a piezoelectric actuator In a printing hammer which is for use in a printer head and comprises a piezoelectric actuator (16) coupled to a base member (15) by a resilient coupler (23), an arm (19) carrying a printing wire (26), and a first resilient hinge (21) coupling the piezoel... | 12/12/1989 |
