United States Patent 4,200,970
May 6, 1980

Method of Adjusting Resistance of a Thermistor
Milton Schonberger

Filed April 14, 1977
Image of US PATENT 4,200,970

Abstract of the Disclosure

A wafer thermistor with opposite, generally flat surfaces has two spaced apart contacts on one surface and a third contact on the opposite surface; the third contact is considerable larger in surface area than the two contacts on the one surface; the conductors leading to the thermistor are connected to the two contacts on the one surface; to change the resistance of the thermistor, removal of a larger percentage of the surface area of one of the contacts will change the resistance of the thermistor by only a fraction of the surface area of the contact that was removed.
Figure descriptions: cover graphic

  • an end view of a thermistor according to the present invention.

 Citations [54]:
2,693,023 11/1954 Kerridge et al. 3,402,448 09/1968 Heath 3,422,386 01/1969 Helgeland 3,548,492 12/1970 Weber 3,657,692 04/1972 Wormser
National Museum of American History
HomeSearchChip TalkChip FunPatentsPeoplePicturesCreditsCopyrightComments