US 5,087,875 A · Isolated high voltage transformer for electric power meter

Abstract

An electronic register in an electric energy meter includes a power supply transformer mounted on and through the register circuit board which is positioned between the base of the meter and the register indicator. Shrouds isolate and insulate the connections within the shrouds to the primary winding of the transformer, and positioning members are provided to secure the transformer to the circuit board while at the same time providing positioning for the secondary winding terminal pins which pass through the circuit board to enable their proper connection, such as by soldering, to the circuit board. A unitary molded bobbin provides a spool for the transformer windings and core, the positioning members, the shrouds, and securing of the secondary winding terminal pins.

Claims24

Dependent claims

An electronic energy meter comprising:

base means comprising means for connecting said electronic energy meter in circuit with a source of power and a load to be metered;
electronic register assembly means spaced from and supported on said base means and including register means, output indicator means, and a register circuit board positioned intermediate said output indicator means and said base means;
power supply transformer means mounted on said register circuit board and including a primary winding and at least one secondary winding;
said secondary winding connected in circuit with the circuitry for said electronic register assembly means;
said power supply transformer means including primary terminals for connecting said primary winding in circuit with said base means, and one or more shrouds of insulating material extending through said register circuit board and surrounding said primary terminals;
and
means to secure said power supply transformer means to said register circuit board.

4 more elements

In an electronic energy meter for connecting in circuit with power lines which may include power surges, and which is configured to facilitate automated assembly, a power supply comprising:

a circuit board including electronic circuitry to be energized by said power supply;
a power supply transformer mounted on said circuit board and including an integral molded bobbin comprising a spool portion around which the primary and secondary windings of said transformer are wound, and one or more shrouds extending away from said spool portion;
said one or more shrouds passing through one or more first apertures in said circuit board, and one or more primary terminals extending into said one or more shrouds and connected in circuit with said primary winding for connection in circuit with said power lines;
said integral bobbin supporting and positioning a plurality of secondary terminal pins at least some of which are connected in circuit with said secondary winding;
said integral bobbin including positioning and securing means to position said power supply transformer on said circuit board with said secondary terminal pins extending through second apertures in said circuit board;
means to connect said secondary terminal pins in circuit with the electronic circuitry of said circuit board.

3 more elements

Dependencies are inferred from the claim text.

Isolated high voltage transformer for electric power meter

Life of this patent

Isolated high voltage transformer for electric power meter

Life of this patent

Abstract

Claims24