Hossein H Khorsand

US Patent:

45990077, Jul 8, 1986

Filed:

Oct 9, 1984

Appl. No.:

6/658672

Inventors:

Hossein Khorsand - San Juan Capistrano CA

International Classification:

B41J 2528
B41J 1950

US Classification:

400322

Abstract:

A reciprocating drive mechanism, capable of producing a substantially trapezoidal velocity profile, reciprocates the hammer banks of a dot matrix printer, or printers in general, at a relatively high frequency (40 HZ), and a high constant velocity (34 to 40 in/sec). Utilizing a set of non-linear springs, the hammer banks are reciprocated at one of the many possible resonant frequencies of the non-linear spring mass system, thus minimizing power consumption. Single action solenoids or a voice coil type motor is servo controlled to compensate for the energy loss due to damping. An optical switch establishes the zero position of the hammer banks at midlength of the travel. A velocity transducer measures the velocities at all positions. By integrating the velocities, the positions at any time of travel is known for proper placement of the print dots.

US Patent:

43785603, Mar 29, 1983

Filed:

May 22, 1980

Appl. No.:

6/152516

Inventors:

Hossein M. Khorsand - San Juan Capistrano CA

International Classification:

H01Q 1514

US Classification:

343912

Abstract:

A lightweight support structure for electromagnetic and light reflectors including at least two rigid compression rings of any diametrical ratio held vertically spaced and parallel by a plurality of rigid vertically extending peripheral columns and two or more flexible cable sets vertically spaced and parallel with the compression rings. Nodes or junctures on the cable sets are adapted to remain fixed in space with respect to the compression rings by a series of tangential and radial cables and thus support rigid vertical internal columns which in turn support the reflector. The internal rigid columns may progressively increase in height from a central hub to the outermost periphery of the compression rings for supporting a reflector dish of parabolic configuration.

US Patent:

44414218, Apr 10, 1984

Filed:

Sep 22, 1982

Appl. No.:

6/421236

Inventors:

Hossein Khorsand - San Juan Capistrano CA

International Classification:

B41J 300

US Classification:

101 9304

Abstract:

Print hammer apparatus comprising a hammer preferably having a non-magnetic flexure provided with a magnetic hammer head and stylus and held in a normally retracted position by a permanent magnet. A pole piece, for concentrating magnetic flux onto the hammer head, is in magnetic contact with the permanent magnet and defines a slot in which the hammer head is received. The hammer head is separated from the pole piece by a minute air gap. An electromagnet is operable, upon activation, to release the hammer from its retracted position for printing. The unique pole piece and hammer head combination and the use of non-magnetic flexures in specialized forms maximize hammer speed for pre-selected forces at pre-selected retracted distances. Positioning the stylus at the center of percussion of the flexure and alignment of longitudinal axes of hammer head, the pole piece ofthe electromagnet, and the stylus also contribute to superior performance.