Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB94925A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MORRIS KOOPMAN
Original Assignee
MORRIS KOOPMAN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MORRIS KOOPMANfiledCriticalMORRIS KOOPMAN
Priority to GB94925ApriorityCriticalpatent/GB244284A/en
Publication of GB244284ApublicationCriticalpatent/GB244284A/en
Investigating Or Analyzing Materials By The Use Of Electric Means
(AREA)
Abstract
244,284. Koopman, M. Jan. 12, 1925. Resistance coatings. - An electric resistance suitable for grid leaks, anode resistances, &c. is made by coating with graphite a flat on an ebonite or like tube fitted with metal screws at the ends, so that the tube can be placed in a measuring apparatus and the film thickened or removed to adjust its resistance. The tube D thus located is placed in an outer insulating tube B furnished with conducting caps A, A', springs C, C<1> being interposed between the caps A, A<1> and screws E screwed into the ends of the tube D.
GB94925A1925-01-121925-01-12Grid leaks, anode resistances, and the like
ExpiredGB244284A
(en)