| 摘要 |
An extension connector for electrical outlet box which embodies a threaded bolt extending through the attachment ear of an electrical unit such as a switch or receptacle and provided with a fixed collar spaced from the head of the bolt and disposed on the underside of the ear and provided with a spring washer between the ear and the collar to maintain positive electrical contact between the bolt and the ear of the electrical unit and thereby provide an adjustable connector for threadably connecting the electrical unit to an outlet box to produce and maintain the desired position of the unit with respect to a finished wall surface while positively maintaining a satisfactory ground connection between the attachment ear of the unit and the box.
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