Abstract: A top drive system for wellbore operations, the top drive system including motor apparatus, a main shaft driven by the motor apparatus, the main shaft having a top end and a bottom end, a quill connected to the main shaft, a gear system interconnected with the quill and the motor apparatus, and a multi-seal system for sealing against the quill. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).

Abstract: A top drive system for wellbore operations, the top drive system including motor apparatus, a main shaft driven by the motor apparatus, the main shaft having a top end and a bottom end, a quill connected to the main shaft, a gear system interconnected with the quill and the motor apparatus, and a multi-seal system for sealing against the quill. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).

Abstract: A multi-seal sealing assembly with multiple seals so that when one seal wears out another can be moved into sealing position; and a top drive system for wellbore operations with such a sealing assembly; the sealing assembly in one aspect having a seal carrier movable to move at least one secondary seal into sealing position when a primary seal has worn out.

Abstract: A multi-seal sealing assembly with multiple seals so that when one seal wears out another can be moved into sealing position; and a top drive system for wellbore operations with such a sealing assembly; the sealing assembly in one aspect having a seal carrier movable to move at least one secondary seal into sealing position when a primary seal has worn out.

Abstract: A computer apparatus receives seed characters relating to an object and accesses rules to generate an identifier. The identifier includes a human-readable component that conveys understanding to a non-skilled user. The identifier complies with limitations dictated by the rules and is not based on random generation.

Abstract: A remote camera relay method and apparatus for remotely operating a self-contained, unattended digital camera over a communications link. Format conversion means are included for transparently relaying control signals and remote image data between a local host processor and the remotely located digital camera, independently of specific camera command and image protocols. It thereby functions as a universal remote image transmission adapter, operable as an attachment for use with self-contained digital cameras. A portable enclosure is provided for accommodating the remote relay communications and control electronics and for attaching a hand-held digital camera thereto. Further means are included for remotely actuating the pan and tilt orientation of the camera in accordance with field-of-view selection commands. Data rate conversion and error correction coding are included for providing reliable, low power image forwarding.

Abstract: A handwriting input method and apparatus for recreating handwriting dynamics. A time dependent code is first embedded in the writing path then later, after-the-fact, said code is detected by processing a digital representation of the writing image. Writing coordinates vs. associated time is decoded therefrom. After-the-fact writing position, velocity, and acceleration is derived from this data which can then be further processed by handwriting recognition and signature authentication devices. A code generating stylus is used to modify writing indicia by modulation of the writing markings thereby embedding time code information within the writing path. The modulated writing is generally uniform when viewed macroscopically but microscopically the embedded code becomes perceivable.

Abstract: A method and apparatus is provided for measuring tension in stressed cables in which use is made of the relationship between the tension and the natural frequency of vibration of the cable. An electrical signal is generated by sensing the fluctuating field of a small permanent magnet attached to the vibrating cable and generating from this signal a periodic pulse signal having an average level proportional to the square of the cable variation frequency. The resulting signal is scaled to produce a final signal which is directly proportional to cable tension.