Class Information
Number: 338/157
Name: Electrical resistors > Mechanically variable (e.g., rheostat) > Movable contact electrically adjustable over length of resistance element > Contact rolls along element or taps
Description: Subject matter wherein the movable contact has a rolling surface which rolls along, or over, and in direct contact with the resistance element or with the intervening structure between the element and contact, such as the element taps.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6639507 |
Plated precision potentiometer |
Oct. 28, 2003 |
| 5818324 |
Wire coil potentiometer wiper |
Oct. 6, 1998 |
| 5570076 |
Variable resistance device |
Oct. 29, 1996 |
| 4975677 |
Guided variable resistor |
Dec. 4, 1990 |
| 4878040 |
Variable resistor |
Oct. 31, 1989 |
| 4794359 |
Variable transformer |
Dec. 27, 1988 |
| 4032880 |
Electrical device |
Jun. 28, 1977 |
| 4010439 |
Planetary potentiometer assembly |
Mar. 1, 1977 |
| 3995248 |
Variable resistance device |
Nov. 30, 1976 |
| 3964011 |
Single turn variable resistance device having a split shaft rotor |
Jun. 15, 1976 |
|
