Resources Contact Us Home
Seismic recording

Image Number 2 for United States Patent #4782911.

A method and apparatus for indicating the time-break on a seismic record wherein the time-break is marked in response to the rupture of an electric circuit by the explosive charge used to generate the seismic waves. The preferred rupturable electric circuit is connected to the same energy source as the electric detonator used to initiate the explosive charge and the preferred electric detonator is one connected to a high frequency A.C. firing energy source through a transformer, the rupturable electric circuit being the primary or secondary circuit of the transformer.The method is more accurate than the present method of marking the time-break at the initial application of current to the detonator.

  Recently Added Patents
Immunotherapy in cancer treatment
Display screen with graphical user interface
Method and apparatus for increasing query traffic to a web site
Method and apparatus for variable accuracy inter-picture timing specification for digital video encoding
Cardiac chamber volume computation from contours and base plane in cardiac MR Cine images
Woven mesh substrate with semiconductor elements, and method and device for manufacturing the same
Controller interface providing improved data reliability
  Randomly Featured Patents
Tree hanger
Insecticides and parasiticides
Water gun
Catalyst for preparing polyolefins
Compositions, kits, and methods for identification, assessment, prevention, and therapy of cervical cancer
RF coil assembly
Antibodies which react with fibrinogen fragments E1, E2 and E3 and methods of their use
Door knob
External analgesic compositions
Method for generating a video image comprising a geometrical figure and a shape generator for carrying out said method