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US 3,990,758 AGranted
Child-safe electrical outlet
OwnerTor H. Pettersoninventor
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a safety outlet which may be readily interchanged for a standard electrical outlet and which has a unique safety feature for preventing insertion of a foreign object into one of the slots in the outlet thereby preventing electrical shock. This safety feature is obtained at low cost and is particularly suited for high speed assembly. The safety also provides improved plug/prong engagement.
Claims14
An electrical outlet comprising:
- 1. a housing including face means;
- slots in said housing face means suitable for receiving the prongs of an electrical plug, electrical contacts supported in said housing positioned inward of said slots and suitable for engaging said prongs;
- 2. two interdependent, shutter means having flat contact surfaces for said prongs parallel to said housing face means containing said slots, each of said shutter means being biased against one of said slots;
- stationary shutter positioning means provided within said housing adjacent to said slots for securing each of the shutter means about a fixed point whereby said shutter means can be pivoted and rotated inward about said fixed point while being prevented from other movement;
- 3. a synchronizer means provided with:
- (a) biasing means directly rotationally engaging said shutter means, and (b) a lock pall means responsive to said biasing means;
- and
- 4. a lock means, positioned inward of said synchronizer supported within said housing substantially equidistant between said contacts comprising:
- (a) a lock detent means positioned substantially directly inward from said shutter positioning means whereby engagement with the lock pall restricts the inward movement of either shutter means, (b) a lock travel means located inward of and in communication with said lock detent means which provides travel for said synchronizer means when the shutter means are engaged simultaneously.
6 more elements
Dependencies are inferred from the claim text.