Remotely operated meter disconnect switch

• US 5,952,739 A
• Filed: 04/24/1998
• Issued: 09/14/1999
• Est. Priority Date: 04/24/1998
• Status: Expired due to Term

• Current Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Original Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Inventors: Piber, Earl Thomas, Grass, William Ernest
• Primary Examiner(s): PALADINI, ALBERT WILLIAM
• Application Number:
  US09/066,492
• Time in Patent Office: 508 Days
• Field of Search: 307/126, 307/122, 379/106.03, 379/305, 323/256, 323/341, 318/282, 318/453, 318/454, 318/466, 318/468, 200/51.17
• US Class Current: 307/126
• CPC Class Codes: G01R 22/00 Arrangements for measuring time integral of electric power or current, e.g. electricity meters
• CPC Class Codes: H01H 3/26 using dynamo-electric motor for storing energy in a spring motor H01H3/30
• CPC Class Codes: H01H 3/46 using rod or lever linkage, e.g. toggle

Abstract

Multiple pairs of stationary and moveable contacts are toggled simultaneously between an open and closed position to disconnect or connect a meter from or to a line power source, by a reciprocating operator driven by low power clock motor. The operator is connected to the contacts through a series of pivotally coupled toggle links that are spring biased to maintain the contacts in either of two stable states, open or closed. The disconnect switch is housed as a modular unit that is interposed between the meter socket and the meter. The switch is remotely actuated and cycles the motor through a pre-determined number of degrees of rotation sufficient to change the state of the contacts.

Claims

1. A meter having a solid state component, including a motor operated switch for disconnecting the meter from a power source, wherein the disconnect switch comprises a moveable contact for connecting the power source to the meter, a low power motor assembly for positioning the moveable contact to a first position which connects the power source to the meter or to a second position which disconnects the power source from the meter, wherein the motor assembly operates at an electrical current level of substantially the same order of magnitude as the electrical current level energizing the solid state meter component;

and

wherein the disconnect switch is a modular option that plugs in between the meter power source input and the power source.

2. A meter having a solid state component, including a motor operated switch for disconnecting the meter from a power source, wherein the disconnect switch comprises a moveable contact for connecting the power source to the meter, a low power motor assembly for positioning the moveable contact to a first position which connects the power source to the meter or to a second position which disconnects the power source from the meter, wherein the motor assembly operates at an electrical current level of substantially the same order of magnitude as the electrical current level energizing the solid state meter component;

and

wherein the moveable contact has two stable, discrete states, the first position and the second position.

3. A meter having a solid state component, including a motor operated switch for disconnecting the meter from a power source, wherein the disconnect switch comprises a moveable contact for connecting the power source to the meter, a low power motor assembly for positioning the moveable contact to a first position which connects the power source to the meter or to a second position which disconnects the power source from the meter, wherein the motor assembly operates at an electrical current level of substantially the same order of magnitude as the electrical current level energizing the solid state meter component;

and

including a spring operable to urge the moveable contact against a second stationary contact when the moveable contact is in a position to connect the power line to the meter.

4. A meter having a solid state component, including a motor operated switch for disconnecting the meter from a power source, wherein the disconnect switch comprises a moveable contact for connecting the power source to the meter, a low power motor assembly for positioning the moveable contact to a first position which connects the power source to the meter or to a second position which disconnects the power source from the meter, wherein the motor assembly operates at an electrical current level of substantially the same order of magnitude as the electrical current level energizing the solid state meter component;

and

wherein the motor operated switch is operated remotely.

5. A meter having a solid state component, including a motor operated switch for disconnecting the meter from a power source, wherein the disconnect switch comprises a moveable contact for connecting the power source to the meter, a low power motor assembly for positioning the moveable contact to a first position which connects the power source to the meter or to a second position which disconnects the power source from the meter, wherein the motor assembly operates at an electrical current level of substantially the same order of magnitude as the electrical current level energizing the solid state meter component;

and

wherein the motor comprises a clock motor.

6. A modular motor operated switch for connecting or disconnecting a power line to a meter having a solid state component, the motor operated switch comprising a moveable contact for connecting or disconnecting a power source to a meter, and a low power motor assembly for positioning the moveable contact to a first position which connects the power source to the meter or to a second position which disconnects the power source from the meter, wherein the motor assembly operates at a power level of substantially the same order of magnitude as the power level used to energize the solid state meter component, including a housing for seating and supporting the motor assembly and the moveable contact, with one side of a base of the housing constructed to interface with a meter socket and the other side of the housing constructed to interface with the meter, so the motor operated switch can directly plug into the meter socket and the meter can directly plug into the switch.

7. The motor operated switch of claim 6 including means for anchoring the switch to the meter socket.

8. A meter having a solid state component, including a motor operated switch for disconnecting the meter from a power source, wherein the disconnect switch comprises a moveable contact for connecting the power source to the meter, a low power motor assembly for positioning the moveable contact to a first position which connects the power source to the meter or to a second position which disconnects the power source from the meter, wherein the motor assembly operates at an electrical current level of substantially the same order of magnitude as the electrical current level energizing the solid state meter component;

wherein the motor assembly comprises;

a motor having a rotatable shaft;

a crank fixedly connected at a first location on the crank to the shaft;

a shuttle operating member slidably connected at a second location on the crank, where the first location is spaced from the second location so rotation of the shaft causes the shuttle to reciprocate; and

a toggle link having two stable positions connected at one end to the movable contact and having another end in force communication with the shuttle, wherein reciprocation of the shuttle causes the toggle to transition between its two stable states causing the movable contact to be in either the first or second position.

9. The motor assembly of claim 8 wherein the operating member moves along a linear path.

10. The motor assembly of claim 9 including

a crank arm fixedly connected at one end to the shaft;

a post attached to a location on the crank arm that is spaced from the end connected to the shaft; and

wherein the operating member has an upper portion with a slot, oriented substantially perpendicular to the axis of movement of the operating member, that slidably captures the post; and

a guide for guiding the operating member along a linear path as the shaft rotates.

11. The motor assembly of claim 10 wherein the operating member includes an internal hollow channel along its axis of movement and a spring confining region within the channel including

an elongated sliding member, having a spring support region, slidably received within the channel and having a portion thereof in force communication with the toggle link;

and

an activation spring surrounding and captured within the spring support region of the sliding member and retained in position within the spring confining region of the channel.

12. The motor assembly of claim 8 including means for deactivating the motor after the movable contact transitions between its first and second position.

13. The motor assembly of claim 12 wherein the motor deactivating means is a timing circuit.

14. The motor assembly of claim 12 Wherein the motor deactivating means senses a predetermined degree of rotation of the crank at or after the point the contact transitions between the first and second position and turns off the motor after the transition.