# US 5,350,315 A · Lamp socket for a Christmas tree light

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- Number: US 5,350,315 A
- Document ID: US5350315A
- Status: Granted
- Kind: A
- Application number: 08/117,866
- Filed: 1993-09-07
- Granted: 1994-09-27
- Earliest claimed: 1993-09-07
- Inventors: You-Jen Cheng; Tzu-Ling Cheng
- Web page: https://patentgrep.com/patent/US5350315A

## CPC

- H01R 33/22: for screw type base, e.g. for lamp
- F21V 21/002: making direct electrical contact, e.g. by piercing (F21V21/35 takes precedence)
- H01R 4/2404: the contact members having teeth, prongs, pins or needles penetrating the insulation
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR

## Abstract

A lamp socket comprised of a socket shell, a socket body fitted into a socket shell to hold a lamp bulb, and a mounting device fastened to the socket shell to hold the electric wire of a light string, wherein the socket shell has stop blocks to stop the socket body from rotary motion relative to the socket shell; the mounting device has bottom blocks pressed on the electric wire against the socket shell; the socket body has two opposite projecting strips inserted through holes on the socket shell and respectively bent inward to hold down the electric wire.

## Claims

### Claim 1

A lamp socket comprised of a socket shelf, a mounting device fastened to said socket shell on the outside through hooked joints to hold an electric wire, a socket body fitted into said socket shell to hold a lamp bulb through a screw joint permitting the lamp bulb to be electrically connected to the electric wire, wherein said socket shell comprises four stop blocks on the inside at four corners respectively engaged into two opposite openings on said socket body to stop said socket body from rotary motion relative to said socket shell; said mounting device comprises two bottom blocks pressed oil the electric wire against said socket shell; said socket body comprises two opposite projecting strips inserted through holes on said socket shell and respectively bent inward to hold down the electric wire.