Patents by Inventor Jan Groot

Jan Groot has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6978026
    Abstract: According to the invention, a circuit arrangement for gaining a 38 kHz stereo subcarrier and a 57 kHz RDS carrier for decoding a stereo signal comprised in a demodulated FM signal and/or an RDS signal comprised in a demodulated FM signal, having a simple structure with only one PLL and particularly only one voltage-controlled oscillator (2) is characterized in that the arrangement comprises a phase-locked loop with a loop filter (1), a voltage-controlled oscillator (2), a first phase detector (3) which receives a reference signal having a reference frequency, and a second phase detector (4), which receives the FM signal, the output signal of the voltage-controlled oscillator (2) being coupled to both phase detectors (3, 4) in a form divided down by means of dividers (6, 9; 10, 11), and the signal fed back to the second phase detector having a frequency of 19 kHz, in that dividers (9, 10, 12) are provided, by means of which the output signal of the voltage-controlled oscillator (2) is divided down and which su
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: December 20, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Guenter Hildebrandt, Gerrit Jan Groot Hulze
  • Publication number: 20020131603
    Abstract: According to the invention, a circuit arrangement for gaining a 38 kHz stereo subcarrier and a 57 kHz RDS carrier for decoding a stereo signal comprised in a demodulated FM signal and/or an RDS signal comprised in a demodulated FM signal, having a simple structure with only one PLL and particularly only one voltage-controlled oscillator (2) is characterized in that the arrangement comprises a phase-locked loop with a loop filter (1), a voltage-controlled oscillator (2), a first phase detector (3) which receives a reference signal having a reference frequency, and a second phase detector (4), which receives the FM signal, the output signal of the voltage-controlled oscillator (2) being coupled to both phase detectors (3, 4) in a form divided down by means of dividers (6, 9; 10, 11), and the signal fed back to the second phase detector having a frequency of 19 kHz, in that dividers (9, 10, 12) are provided, by means of which the output signal of the voltage-controlled oscillator (2) is divided down and which su
    Type: Application
    Filed: October 22, 2001
    Publication date: September 19, 2002
    Inventors: Guenter Hildebrandt, Gerrit Jan Groot Hulze
  • Patent number: 6375111
    Abstract: A method is provided for unwinding a cake of wound elastomeric yarn from a creel, passing the elastomeric yarn over a bend in a thread guide and beaming the elastomeric yarn onto a bobbin in a warper head. The method includes the step of positioning the bend in the thread guide so as to contact the elastomeric yarn passing over the bend and change the direction of the elastomeric yarn passing through the thread guide just one time. The thread guide is attached to a base member such that a portion of the thread guide moves in response to changes in tension in the elastomeric yarn. The base member includes a mechanism for monitoring the position of the thread guide, which generates an electrical signal if the thread guide moves beyond a desired range in response to an increase in tension in the elastomeric yarn. The monitoring mechanism may also generate an electrical signal in response to the absence of tension in the elastomeric yarn passing through the thread guide.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: April 23, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jacek Zygmunt Mycielski, Gerardus Van Den Hoven, Frederick Jan Groot, Johannes Leonardus Jozefus Brouwers
  • Patent number: 6126102
    Abstract: A beaming apparatus that includes a creel and warper head, the creel being positioned adjacent to the warper head, the creel having elastomeric yarn unwinder assemblies which include a guide support that supports rotating guides and stationary wound cakes of elastomeric yarn, a thread guide for orienting the unwound yarn towards the warper head, a front guide and tension bar positioned near the end of the creel, and a pivoting reed positioned before the warper head for orienting the yarn onto a beam are provided.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: October 3, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jacek Zygmunt Mycielski, Gerardus van den Hoven, Frederik Jan Groot, Johannes Leonardus Jozefus Brouwers
  • Patent number: 4016478
    Abstract: A component holder is arranged on the windings of a diode-split line transformer. On this holder the diodes, the focus bleeder and the high-voltage bleeder can be arranged. The connection strips of the components act as soldering pins for the winding ends. The high voltage is connected via a socket connector which is clamped to the component holder by way of two snap tags. The socket connector is provided with radially extending ribs so as to increase the creepage path. The contact spring of the socket connector has a triangular shape, thus ensuring a large contact surface area.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: April 5, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Herbert Anders, Antonius Adrianus Maria Bullens, Jan Groot, Johannes Henricus Bernardus Otten, Hendrikus Christiaan Josephus Stoof, Carolus Leopoldus Vloemans