# US 5,351,038 A · Quick trip circuit breaker locator

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,351,038 A
- Document ID: US5351038A
- Status: Granted
- Kind: A
- Application number: 07/997,347
- Filed: 1992-12-28
- Granted: 1994-09-27
- Earliest claimed: 1992-12-28
- Inventors: Arnold Goldberg
- Web page: https://patentgrep.com/patent/US5351038A

## CPC

- H02H 3/044: {Checking correct functioning of protective arrangements, e.g. by simulating a fault (for differential current circuit breakers H02H3/335)}
- G01R 31/327: Testing of circuit interrupters, switches or circuit-breakers
- H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H)
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)

## Abstract

A circuit breaker locator comprises a housing having a plunger projecting outwardly at one end and reciprocably moveable within the housing. The plunger is coupled to a spring urged retractable contact at the opposite end of the housing. The housing also includes, at the end with the retractable contact, a pair of contacts extending outwardly therefrom which are coupled to a fuse and a pilot light connected in parallel with the fuse. In operation, the pair of contacts are inserted into an electrical outlet and the plunger is actuated forcing the retractable ground contact into the outlet. The device automatically trips a circuit breaker related to the particular outlet so that it is possible to check which circuit breaker is connected to the outlet. If the breaker fails to trip, the alarm light, which is connected parallel with the fuse, is activated indicating a faulty circuit breaker. The circuit breaker locator provides a ready and safe means of determining what circuit breaker is related to what outlet.

## Claims

### Claim 1

A circuit breaker locator for use with circuits having a plurality of receptacles and corresponding circuit breakers comprising:
a housing having an elongated body portion and a transverse cover portion at each end,
a plunger extending outwardly through the cover from one end of the housing and axially within the housing, said plunger being reciprocably moveable within said housing,
resilient means engaging the plunger within the housing to maintain the plunger in a predetermined position within said housing,
a pair of electrical contacts for insertion into a receptacle and a ground contact extending outwardly from the other end of the housing wherein the ground contact is coupled to the plunger within the housing said plunger being actuated to thereby move the ground contact outwardly from the housing, and
a fuse having a higher rating than the corresponding circuit breaker for the outlet mounted within the housing between the pair of electrical contacts wherein the pair of contacts are inserted into a receptacle and the plunger actuated causing the ground contact to engage the receptacle and the corresponding circuit breaker to trip.

### Claim 2 (depends on 1)

A circuit breaker locator in accordance with claim 1 wherein:
the plunger includes an elongated stem having a handle mounted thereon at one end of said stem outside the cover,
a transverse plate extending across the housing and having a central aperture, the other end of the stem mounted within said aperture for reciprocal movement, and, a spring, mounted between the plate and the other end of the housing to maintain the ground contact in a retracted position within the housing, said ground contact being moved outwardly into a receptacle when the plunger is actuated.

### Claim 3 (depends on 2)

A circuit breaker located in accordance with claim 2 further including:
a light mounted on the housing end adjacent the plunger, said light being connected in parallel with the fuse and becoming operable if the circuit breaker associated with the outlet fails to trip and the fuse blows to indicate failure of the corresponding circuit breaker.

### Claim 4 (depends on 2)

A circuit breaker locator in accordance with claim 2 wherein:
the fuse has a rating substantially higher than the circuit breaker to which it is coupled so that the circuit breaker trips when the contacts are inserted into a receptacle thereby determining which circuit breaker is related to which outlet or alternatively the fuse fails indicating that the corresponding circuit breaker is inoperative.

### Claim 5 (depends on 2)

A circuit breaker locator in accordance with claim 2 further including:
a second housing having female receptacles at one end to engage the contacts on the end of the locator housing and a pair of leads extending outwardly from the other end of the second housing and having an alligator clip on the contacts.

### Claim 6 (depends on 2)

A circuit breaker locator in accordance with claim 2 wherein:
the fuse has a rating of approximately 50 amps.