Patents Assigned to Sawafuji Electric Company, Ltd.
  • Patent number: 4416594
    Abstract: A horizontal type vibrating compressor having a cylindrical container for accommodating a compressor proper which is disposed horizontally, and closure members for closing both open ends of the cylindrical container; and having such a construction that a piston fixed to a driving coil is caused to vibrate in substantially horizontal direction in a cylinder, wherein coil springs are respectively interposed in the compressed state between each closure member and the compressor proper; cushioning members are fixed via cup-shaped holders to any one side of the compressor proper or the closure members; pin-shaped supporting members, which are adapted to be axially slidable by engaging with the cylindrical portion of the cushioning members are fixed to the other side of the compressor proper or the closure members; and an air/oil intake tube connecting the outside and inside of the compressor proper is provided, the outer end thereof being connected to a fiber braided tube disposed on the lower inside part of the c
    Type: Grant
    Filed: August 12, 1980
    Date of Patent: November 22, 1983
    Assignee: Sawafuji Electric Company, Ltd.
    Inventor: Kaoru Ichikawa
  • Patent number: 4035713
    Abstract: An automatic voltage regulating system in a brushless generator comprising a permanent magnet provided on the stator side of a main generator and constituting a field system of an exciter generator portion, an exciter generating coil provided on the rotor side of the main generator, rectifier for rectifying a voltage induced in the exciter generating coil, a field coil of the main generator excited by the output of the rectifier and provided on the rotor side, and an armature coil of the main generator provided on the stator side, and characterized in that the permanent magnet and a control coil are provided on the exciter field system, and an automatic voltage regulating portion which detects the output voltage of the main generator and supplies the control coil with a controlling current is provided so that fluctuations of the output voltage of the main generator can be absorbed by the control coil.
    Type: Grant
    Filed: March 16, 1976
    Date of Patent: July 12, 1977
    Assignees: Sawafuji Electric Company, Ltd., Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Takato Kawamoto, Tsutomu Katauchi, Eizi Narumi, Katsutoshi Tagami
  • Patent number: 4027211
    Abstract: An electrical vibration type compressor comprising a drive coil vibratably supported in a mechanical vibration system, a piston driven by the drive coil, at least one main semiconductor element with a control electrode which performs the switching control of a drive current to the drive coil, and a detecting means consisting of at least one detecting semiconductor element with a control electrode detecting the vibration of the drive coil to control the conduction and cutoff of the main semiconductor element with a control electrode and at least one timeconstant circuit; whereby the feedback transformer which has so far been used in a device of this type to supply a feedback current to the main semiconductor element with a control electrode is eliminated, and the switching operation is properly performed at the top and bottom dead centers of the piston.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: May 31, 1977
    Assignee: Sawafuji Electric Company, Ltd.
    Inventors: Morikazu Omura, Yukio Okuda, Hiroyuki Kainuma