Patents by Inventor Preben C. Sparre

Preben C. Sparre 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: 4559413
    Abstract: A rail insulator (5) for the securing of a conductor rail (2) on a rail support (4) which comprises a substantially U-shaped supporting rail in which holes are provided at regular intervals, preferably in two parallel rows, and where the rail insulator (5) is formed with a notch (18) corresponding to the thickness of the rail being used, is arranged so that on the side turning away from the notch it has outwardly-extending, hook-formed holding elements (24, 25) arranged to grip around and be secured to the rail support (4), in that between the holding elements there is provided a guide stud (30) which fits down into one of the holes in one of the rows of holes. One thus obtains a rail insulator which is well-suited for use in the building up of rail areas, in that the rail insulator can quickly and easily be removed and mounted on the rail support without detracting from the strength and the ability of the rail area to absorb mechanical forces from changes in current.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: December 17, 1985
    Assignee: A/S Logstrup-Steel
    Inventors: Jorgen Logstrup, Preben C. Sparre
  • Patent number: 4534612
    Abstract: A current connecting device for establishing electrical connection between rail conductors, having contact clips (20) and division plates (23), the contact clips (20) being modular and comprising two flat electrically conducting coupling pieces (35, 50) which are disposed inside a housing (26) made of insulating material with openings (49) for connection. Each of the coupling pieces has a spring (33, 34) which provide the necessary contact pressure. Each contact clip (20) has an insulating housing (26) in which there is disposed a fixed coupling piece (50) and a coupling piece (35) which can be made maneuverable if desired. Each coupling piece has two contact surfaces (36, 37, 38, 39). Both the division plates (23) and the contact clips (20) are provided with a releasing element (27, 28). The device is a universally applicable current connector with which one can form conductive couplings between electrical conductors, for example copper rails (40), wherever it is desirable.
    Type: Grant
    Filed: August 5, 1983
    Date of Patent: August 13, 1985
    Assignee: A/S Loegstrup-Steel
    Inventors: Joergen Loegstrup, Preben C. Sparre