Pop-up electrical receptacle unit

• US 4,511,198 A
• Filed: 10/12/1983
• Issued: 04/16/1985
• Est. Priority Date: 10/12/1983
• Status: Expired due to Fees

• Current Assignee: Dunbar Furniture, Inc.
• Original Assignee: Dunbar Furniture, Inc.
• Inventors: Mitchell, Terry L., Hodge, David H.
• Primary Examiner(s): Abrams, Neil
• Application Number:
  US06/541,206
• Time in Patent Office: 552 Days
• Field of Search: 339/34, 174/48, 174/57, 248/409
• US Class Current: 439/131
• CPC Class Codes: A47B 2021/068 with pop-up power outlet
• CPC Class Codes: H01R 13/44 Means for preventing access to live contacts making use of a switch actuated by engagement of counterpart H01R13/7036
• CPC Class Codes: H02G 3/185 Floor outlets and access cups

Abstract

The pop-up electrical receptacle unit, when mounted in relation to an opening in a desk or table, enables the user to effect a retracted or concealed condition of the receptacle by pressing the receptacle downwardly and then permitting the receptacle to rise slightly by means of a coil spring. Such action rotates a ratchet mechanism into an obstructive relation with a pin carried on an actuator attached to the underside of the receptacle and movable therewith. The user effects a protracted or exposed condition of the receptacle by again depressing and releasing the receptacle so as to rotatively index the ratchet mechanism into an angular relation in which the actuated pin is no longer obstructed, the receptacle then being thrust upwardly by the coil spring into its protracted position in which position the prongs of an electrical plug can be inserted into the elevated receptacle.

Claims

1. A pop-up electrical receptacle unit comprising a receptacle for receiving therein the prongs of an electrical plug, means constraining said receptacle for rectilinear movement between a retracted position and protracted position, spring means for urging said receptacle from its said retracted position into its said protracted position, manually releaseable means for retaining said receptacle in its said retracted position including a rotary ratchet mechanism, an actuator on said receptacle having a pin thereon for alternately shifting said ratchet mechanism into an interfering position relative to said pin to establish said retracted position when said receptacle is moved from its protracted position to its said retracted position and into a non-interfering position when said receptacle is moved from its retracted position rectilinearly against the force of the spring means to cause said pin to shift said ratchet mechanism.

2. A pop-up electrical receptacle unit comprising a bracket adapted at one end to be attached to a furniture item, a receptacle reciprocably mounted on said bracket for receiving therein the prongs of an electrical plug, said bracket constraining said receptacle for rectilinear movement between a retracted position and protracted position, said retracted position resulting in said receptacle projecting a lesser distance beyond said one end of said bracket and said protracted position resulting in said receptacle being projected a greater distance beyond said one end of said bracket, a ratchet mechanism rotatably mounted adjacent the other end of said bracket, said ratchet mechanism including first and second cup-shaped members, each cup-shaped member having a series of annularly disposed angled teeth, the teeth of said first cup-shaped member being angularly offset with respect to the teeth on said second cup-shaped member, said first cup-shaped member having at least one slot located between two adjacent teeth, a plunger connected at one end to said receptacle and extending through said cup-shaped members, a transverse pin carried on said plunger, said pin being of a size to pass through said slot when said slot is angularly in register therewith, whereby manual movement of said receptacle in a direction toward said retracted position causes said pin to enter through said slot and engage at least one tooth on said second cup-shaped member to partially rotate said cup-shaped members in one angular direction, and spring means for urging said plunger in a direction toward said protracted position so that when manual pressure is removed from said receptacle, then said spring means urges said pin in a direction to engage at least one of the teeth on said first cup-shaped member to partially rotate said cup-shaped members farther in said one angular direction and to rotate said slot out of registry with said pin so that said receptacle is retained in its said retracted position.

3. A pop-up electrical receptacle unit in accordance with claim 2 in which said first cup-shaped member has an additional slot, said additional slot being angularly displaced with respect to said first slot, subsequent manual movement of said receptacle causing said pin to engage a second tooth on said second cup-shaped member to partially rotate said cup-shaped members still farther in said one angular direction, release of said receptacle permitting said spring means to urge said plunger in a direction to cause said pin to engage a second tooth on said first cup-shaped member whereby said additional slot is rotated into registry with said pin so that said pin can pass therethrough to allow said receptacle to move into its said protracted position under the influence of said spring means.

4. A pop-up electrical receptacle unit in accordance with claim 3 in which said bracket has a slot, and an armored cable connected to said receptacle, said armored cable extending through said bracket slot and movable longitudinally in said bracket slot when said receptacle is moved from its retracted position into its said protracted position and vice versa.

5. A pop-up electrical receptacle unit in accordance with claim 4 in which said bracket is U-shaped, said U-shaped bracket having a bight formed with a circular opening therein, said cup-shaped members when connected together forming a groove into which the marginal portion of said bight circumjacent said circular opening extends, said U-shaped bracket thereby journaling said cup-shaped members for rotation.

6. A pop-up electrical receptacle unit in accordance with claim 5 in which said U-shaped bracket includes oppositely issuing flanges at its said one end which adapt said bracket for attachment to said furniture item.

7. A pop-up electrical receptacle unit in accordance with claim 6 in which said furniture item constitutes a desk or table having a hole therein so that said receptacle is beneath the working surface of said desk or table when said receptacle is in its said retracted position and said receptacle extends above the working surface of said desk or table when said receptacle is in its said protracted position.

8. A pop-up electrical receptacle unit comprising a receptacle for receiving therein the prongs of an electrical plug, means constraining said receptacle for rectilinear movement between a retracted position and protracted position, spring means for urging said receptacle from its said retracted position into its said protracted position, manually releasable means including a ratchet mechanism for retaining said receptacle in its said retracted position, said ratchet mechanism including first and second disk members, each having a series of teeth thereon successively engageable by said actuating means, and means fastened to said receptacle and movable therewith for actuating said ratchet mechanism.

9. A pop-up electrical receptacle unit in accordance with claim 8 in which said first disk member is nearer said receptacle and said second disk member is farther from said receptacle, the teeth on said first disk having sloping surfaces facing said second disk and the teeth on said second disk having sloping surfaces facing said first disk.

10. A pop-up electrical receptacle unit in accordance with claim 9 in which said actuating means includes a transverse pin for successively engaging the sloping surfaces of said teeth.

11. A pop-up electrical receptacle unit in accordance with claim 10 in which the teeth on said first disk are angularly offset with respect to the teeth on said second disk.

12. A pop-up electrical receptacle unit in accordance with claim 11 in which said first disk includes at least one slot through which said pin passes.

13. A pop-up electrical receptacle unit in accordance with claim 12 in which said disks incrementally rotate in unison each time said pin engages the sloping surface of a tooth.

14. A pop-up electrical receptacle unit in accordance with claim 8 in which said first disk member is nearer said receptacle and said second disk member is farther away from said receptacle, and fastening means maintaining said disk members together as a unit with the teeth of said first disk member being angularly offset from the teeth of said second disk member, manual movement of said receptacle in a direction toward said retracted position causing said actuating means to engage one of the teeth on said second disk member to incrementally rotate said disk members in one angular direction and thus move said disk members into a first rotative position and spring movement of said receptacle in a direction toward said protracted position causing said actuating means to engage one of the teeth on said first disk member to incrementally rotate said disk members further in said one angular direction to move said disk members into a second rotative position.

15. A pop-up electrical receptacle unit in accordance with claim 14 in which said first disk member provides obstructive interference with said actuating means to retain said receptacle in its said retracted position when said disk members are in their said second rotative position.

16. A pop-up electrical receptacle unit in accordance with claim 15 wherein a subsequent manual movement of said receptacle in a direction toward said retractive position causes said actuating means to engage a second of the teeth on said second disk member to incrementally rotate said disk members still farther in said one angular direction to move said disk members into a third rotative position and spring movement of said receptacle in a direction toward said protracted position again incrementally rotating said disk members even farther in said one angular direction to move said disk members into a fourth rotative position to permit said spring means to urge said receptacle into its said retracted position.

17. A pop-up electrical receptacle unit in accordance with claim 16 in which said actuating means includes a transverse pin, said pin engaging said one tooth on said second disk member to incrementally rotate said disk members into said first rotative position, said pin subsequently engaging said one tooth on said first disk member to rotate said disk members into said second rotative position, said pin subsequently engaging said second tooth on said second disk member to rotate said disk members into said third rotative position and said pin engaging said second tooth on said first disk member to move said disk members into said fourth rotative position.