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Class 33/739 - With signal means


Subclass of Class 33 - Geometrical instruments
Definition: Subject matter including means to produce an audible or
No. of patents: 6
Last issue date: 07/28/1998


NumberTitleIssue Date
5784796Lineal count recorder
An engineering drawing copier includes a device for measuring and recording cumulative movement of the copier's paper feed belt only when paper is present at the exposing lamp. A correct cumulative paper length is generated, notwithstanding variations in ...
07/28/1998
5546672Magnetic mark detection
A method and apparatus for detecting magnetic marks on a wireline logging cable and for more accurately making depth measurements during logging is described. The method uses depth-based, rather than time-based, samples and calculations. A Hall Effect sen...
08/20/1996
5009242Apparatus for monitoring sewer cleaning tool extension
A mobile sewer cleaning machine comprises an elongated sewer cleaning tool wound upon a reel mounted in a reel compartment of the machine. A reel control motor is coupled to the reel to rotate the reel in one direction to play out the tool into a sewer by...
04/23/1991
4535949Length measuring during rolling up of thin material
A device for measuring the rolled-up length of web forming a roll when a web break has occurred during formation of the roll employs a web break indicator to indicate a web break. Normal web length measuring is carried out by counting pulses from a pulse ...
08/20/1985
4463913System and apparatus for controlling the unwinding of coiled material
System and apparatus for controlling of coiled material in a rolling line or in a process line, in which an instruction signal is produced at a predetermined moment to decrease the unwinding speed when the coiled material is to be unwound, the system and ...
08/07/1984
4156467Well drilling system
In a well drilling system, a drill bit is raised or lowered through formations surrounding a borehole in response to the movement of a cable onto and off of a drawworks drum. Magnetic markings are affixed to the drum, and a pair of sensors detect rotation...
05/29/1979
 
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