Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS437011 A
Publication typeGrant
Publication dateSep 23, 1890
Filing dateAug 25, 1888
Publication numberUS 437011 A, US 437011A, US-A-437011, US437011 A, US437011A
InventorsEdward M. Bentley
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Edward m
US 437011 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

(No Model.)

B. M. BENTLEY. ARTIFICIAL RESISTANCE. No. 487,011. Patented Sept. 23, 1890.




SPECIFICATION forming part of Letters Patent No. 437,011, dated September 23, 1890, Application filedAugust 25, I888- Serial No. 283,781. (No model.)

To all whom it may concern:

Be it known that I, EDWARD M. BENTLEY, a citizen of the United States, residing at New York, in the county of New York, State of New York, have invented certain new and useful Improvements in Artificial Resistances, of which the following is a specification.

My invention relates to artificial electrical resistances which may be varied at will; and it consists in a series of metallic plates in superficial contact, which form the resistance and which are provided with a series of contact-points electrically connected to certain ones of the series of plates, and a contact-arm adapted to make connection with the points to bring any desired amount of the resistance into circuit.

My invention is illustrated in the accompanying drawing, in which- A represents a series of metallic plates, preferably of oxidized iron or steel, placed in superficial contact, so that they may present a resistance to the passage of any electricity through them. To certain plates B in the series are attached conductors E, terminating in contacts, themselves independent of and removed from the plates, and over which sweeps the contact-arm D. The circuit is always from plus wire to lever D, to resistance A, to final plate, and thence to minus wire. By this means D may be turned to any one of plates C. The amount of resistance in circuit may be regulated at will.

In practice the use of the additional set of contact-points C is often a more desirable construction than those hitherto used in which the arm sweeps directly over the resistance-plates, for in the latter case the arm is liable to become stuck between the edges of the metal plates and push them slightly out of place, thereby destroying the uniformity of resistance throughout the series. Furthermore, as the number of contact-points is considerably smaller than that of the plates a shorter range of movement for the contactarm is possible, thereby making a less cumbersome construction and at the same time one capable of regulating the resistance with sufficient nlcety.

I claim- 1. A variable electrical resistance comprising a series of metallic plates in contact with one another, a series of contact-points independent of and removed from the said plates, conductors electrically connecting said contact-points with the plates at various points along the series, and a moving contact-maker for engagement with the contact-points, as set forth.

2. The combination, in an electrical resistance, with a series of resistance-plates in contact with one another, a series of contact points independent of and removed from the plates, and intermediate conductors connecting the contact-points, respectively, with the plates at various points in the series, of a pivoted contact-arm adapted to sweep over the said contact-points and thereby bring more or less of said resistance-plates into circuit, as described.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7067172Apr 22, 2004Jun 27, 2006Avx CorporationComponent formation via plating technology
US7152291Apr 8, 2003Dec 26, 2006Avx CorporationMethod for forming plated terminations
US7154374 *Jun 1, 2004Dec 26, 2006Avx CorporationPlated terminations
US7344981Feb 25, 2005Mar 18, 2008Avx CorporationPlated terminations
US7463474Dec 19, 2006Dec 9, 2008Avx CorporationSystem and method of plating ball grid array and isolation features for electronic components
US7576968Aug 10, 2006Aug 18, 2009Avx CorporationPlated terminations and method of forming using electrolytic plating
US20030231457 *Apr 8, 2003Dec 18, 2003Avx CorporationPlated terminations
US20040197973 *Apr 22, 2004Oct 7, 2004Ritter Andrew P.Component formation via plating technology
US20040218373 *Jun 1, 2004Nov 4, 2004Ritter Andrew P.Plated terminations
US20070014075 *Aug 10, 2006Jan 18, 2007Avx CorporationPlated terminations and method of forming using electrolytic plating
US20070133147 *Dec 19, 2006Jun 14, 2007Avx CorporationSystem and method of plating ball grid array and isolation features for electronic components
Cooperative ClassificationH01C7/10