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
Snapshots in de-duplication
Wind farm, wind power plant in a wind farm and operating control for this purpose
Restore software with aggregated view of content databases
Transducer displacement protection
Music composition automation including song structure
Methods and systems for time-shifting content
Device and method for arranging vials
  Randomly Featured Patents
Lithographic apparatus having a feed forward pressure pulse compensation for the metrology frame
Method for providing telephone services for commercial classes of service
Method for producing a nondetachable, fluid-tight, and gastight connection between a plate stack and a lateral component of an electrochemical battery and for spacing electrode plates, as well
Apparatus for cutting hollow pipes
Miller effect-based circuit for splitting poles
Blister-foil packaging machine
Gravity slide ride
Imaging device, printing system, printing device, image printing method, and storage medium having stored thereon program controlling the image printing method
Low frequency inertia balanced dipole hydrophone
Anhydrous foaming composition containing low concentrations of detergents and high levels of glycerin amd emollients such as oils and esters