D2S / D2A (1960 to 1963) Previous
Back
Up
Up
Next
Next
 
The D2S and D2A were mostly identical to the previous DS and DA meters, the biggest difference being the bearing system. The jewel and ball bearing that had been used ever since the Type A was replaced by a new magnetic float bearing (called the "Magnethrust" system). Earlier D2S and D2A meters used the same molded polyester for insulation on the current coils as on the DS and DA meters, but in 1961, this was changed over to butyl rubber which was a far better insulation solution. Also, the cover flange and sealing pin on the DS was replaced with a longer-lasting (and more standard) stainless steel flange that was adapted to the aluminum breakaway "T" seals coming into use at that time. Westinghouse D2S
Photo by David Dahle