Electrical circuit breaker safety system

Patent metadata

Field	Value
Publication number	US-9570251-B2
Application number	US-201414487495-A
Country	US
Kind code	B2
Filing date	Sep 16, 2014
Priority date	Sep 16, 2014
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A system is provided for preventing a push-pull circuit breaker from being inadvertently depressed. The system may include a clip member having a generally C-shaped collar defining a cylindrical recess therein. The clip member is configured to resiliently expand to be positioned over and receive a cylindrical portion of the circuit breaker knob in a manner that prevents the circuit breaker knob from being depressed to close the circuit breaker. The system further includes first and second tabs depending from ends of the clip member. A cable tie may be positioned through openings formed in the first and second tabs to secure the first and second ends to each other, thereby locking the clip member in position on the push-pull circuit breaker knob and preventing the circuit breaker knob from being depressed.

First claim

What is claimed is:

1. A system for preventing actuation of a push-pull circuit breaker knob, the system comprising:
a clip member having a generally C-shaped collar defining a cylindrical recess therein, wherein the clip member resiliently expands to be positioned over and receive a cylindrical portion of the circuit breaker knob;
first and second tabs depending from free ends of the clip member, the first and second tabs forming a restricted opening for which the cylindrical portion of the circuit breaker knob may be snapped into the recess, the first and second tabs having openings therethrough; and
a retainer coupled to the first and second tabs in a manner that prohibits the first and second tabs from being urged apart and the clip member from expanding sufficiently to permit removal of the clip member from the circuit breaker knob, thereby locking the clip member in position on the push-pull circuit breaker knob and preventing the circuit breaker knob from being depressed,
where each tab forms a substantially concave shape that includes a curved end integrally formed with opposite ends of the clip member, a substantially planar landing portion, and an angled free end opposite the curved end, and
where the free end is angled relative to the landing portion to angular dimensions between approximately 10° to 45°.

2. The system of claim 1 , where the retainer is a cable tie positioned through the openings in the first and second tabs and fastened in a loop to secure the first and second tabs to each other in a manner that prohibits the first and second tabs from being urged apart and the clip member from expanding sufficiently to permit removal of the clip member from the circuit breaker knob.

3. The system of claim 1 , where the tabs have a thickness greater than the thickness of the clip member.

4. The system of claim 1 , where the free ends of the tabs cooperate to form a substantially V-shaped mouth and a restricted opening into which cylindrical portion of the circuit breaker knob may be snapped.

5. The system of claim 4 , where the mouth and restricted opening communicate with the recess to provide a means for urging the tabs apart and guiding the circuit breaker knob into the recess.

6. The system of claim 1 , where a tag is coupled to the retainer, the tag bearing safety information.

7. A clip configured to be removably received over a cylindrical portion of a push-pull circuit breaker knob, the clip comprising:
a substantially C-shaped collar defining a cylindrical recess therein, the collar being configured to resiliently expand to be positioned over and receive the cylindrical portion of the circuit breaker knob in a manner that prevents the circuit breaker knob from being depressed to close the circuit breaker; and
first and second tabs depending from free ends of the collar, the first and second tabs forming a restricted opening for which the cylindrical portion of the circuit breaker knob may be snapped in the recess, the first and second tabs each having an opening therethrough,
where each tab forms a substantially concave shape that includes a curved end integrally formed with opposite ends of the collar, a substantially planar landing portion, and an angled free end opposite the curved end, and
where the free end is angled relative to the landing portion to angular dimensions between approximately 10° to 45°.

8. The clip of claim 7 , where the tabs have a thickness greater than the thickness of the collar.

9. The clip of claim 7 , where the free ends of the tabs cooperate to form a substantially V-shaped mouth and a restricted opening into which the cylindrical portion of the circuit breaker knob may be snapped.

10. The clip of claim 9 , where the mouth and restricted opening communicate with the recess to provide a means for urging the tabs apart and guiding the circuit breaker knob into the recess.

11. The clip of claim 7 , where a cable tie is positioned through the openings in the first and second tabs and fastened in a loop to secure the first and second tabs to each other in a manner that prohibits the first and second tabs from being urged apart and the collar from expanding sufficiently to permit removal of the clip from the circuit breaker knob.

12. The system of claim 11 , where a tag is coupled to the retainer, the tag bearing safety information.

13. A method for preventing actuation of a push-pull circuit breaker knob, the method comprising:
disengaging the circuit breaker knob from its corresponding circuit breaker panel;
applying a clip member about an actuating cylindrical portion of the circuit breaker knob, the clip member having a generally C-shaped collar defining a cylindrical recess therein, the clip member being configured to resiliently expand to be positioned over and receive the cylindrical portion; and
coupling a retainer to the clip member to secure the clip member to the cylindrical portion of the circuit breaker knob in a manner that prohibits the clip member from being forceably removed from the circuit breaker knob,
where coupling the retainer includes snapping the clip member in the cylindrical portion of the circuit breaker knob utilizing first and second tabs that depend from free ends of the clip member, where the first and second tabs form a restricted opening that the cylindrical portion of the circuit breaker knob may be snapped in the recess, the first and second tabs each having an opening therethrough,
where each tab forms a substantially concave shape that includes a curved end integrally formed with opposite ends of the clip member, a substantially planar landing portion, and an angled free end opposite the curved end, and
where the free end is angled relative to the landing portion to angular dimensions between approximately 10° to 45°.

14. The method of claim 13 , where the clip member is wedged between a head portion of the circuit breaker knob and the circuit breaker panel to prevent the circuit breaker knob from being depressed to engage the circuit breaker.

15. The method of claim 13 further comprising the step of coupling an indicator to the retainer, the indicator bearing safety information.

16. The method of claim 13 further comprising the step of providing a too for severing the retainer such that the clip member may be removed from the circuit breaker knob.

Assignees

• Boeing Co

Inventors

• Weaver Donald C
• Dixon Robert D
• Mitchell James D

Classifications

• H01H9/28

  for locking switch parts by a key or equivalent removable member (switches operated by a key H01H27/00; locking by removable part of two-part coupling device H01R) · CPC title

• H01H9/286 Primary

  making use of a removable locking part acting directly on the operating part (H01H9/281 takes precedence) · CPC title