Level gauge for oil-filled transformer, choke, or tap changer

Details Level gauge for oil-filled transformer, choke, or tap changer Level gauge for oil-filled transformer, choke, or tap changer

2007-03-20

2007-03-20

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Liquid level or depth gauge

Float

C073S314000, C073S317000

Reexamination Certificate

active

11250773

ABSTRACT:
An electric power apparatus has a oil-filled vessel in which a float is connected to a float shaft that rotates as the float rises and falls with the level of oil. A level indicator has a display shaft extending along and pivotal about an axis, and coupled to the float shaft. An indicia display adjacent the shaft is swept by a pointer fixed on the shaft and juxtaposed with the indicia display go that the level of the oil in the vessel is indicated by the pointer. A disk fixed to the shaft has an outer periphery with a region of a shape having a radius varying angularly from one end of the region to an opposite end of the region. A noncontact proximity sensor is radially spacedly juxtaposed with the region of the disk for producing an output corresponding to the radial distance between the region and the sensor.

REFERENCES:
patent: 3112464 (1963-11-01), Ratajski et al.
patent: 4911011 (1990-03-01), Fekete et al.
patent: 5159268 (1992-10-01), Wu
patent: 5982170 (1999-11-01), McCurley et al.
patent: 6679116 (2004-01-01), Ross, Jr.
patent: 6708562 (2004-03-01), Kruger et al.
patent: 6734667 (2004-05-01), Lorenzen
patent: 2003/0084720 (2003-05-01), Ross, Jr.
patent: 2003/0094044 (2003-05-01), Kruger et al.
patent: 2003/0177827 (2003-09-01), Lorenzen
patent: 2004/0154393 (2004-08-01), Taylor et al.
patent: 41 19 063 (1992-12-01), None
patent: 2 845 469 (2004-04-01), None
XP-002374015; Nov. 1961; Machine Design, 33; pp. 156; “Transducers”; Bd. 33; Nr. 24.

Affiliated with

Also associated with

Rating

Level gauge for oil-filled transformer, choke, or tap changer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Level gauge for oil-filled transformer, choke, or tap changer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Level gauge for oil-filled transformer, choke, or tap changer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3752577