Lamp socket

1. A lamp assembly, comprising: a lamp socket, comprising: a first socket portion defining a first cylindrical volume proximate to an open end of the lamp socket, the first cylindrical volume having a first diameter; and a second socket portion being concentric with the first socket portion and defining a second cylindrical volume distal from the open end of the lamp socket, the second cylindrical volume having a second diameter smaller than the first diameter.

2. The lamp assembly of claim 1 , wherein the first and the second socket portions respectively comprise a threaded upper portion and a threaded lower portion of a cavity defined by a housing.

3. The lamp assembly of claim 2 , further comprising a first electrical contact located at a bottom of the cavity, wherein the threaded upper portion comprises conductive internal threads or a conductive tab, the conductive internal threads or the conductive tab being a second electrical contact.

4. The lamp assembly of claim 1 , wherein:

the first and the second socket portions respectively comprise a tall outer socket and a short inner socket concentrically seated on a socket base;

the tall outer socket comprising first conductive internal threads or a first conductive tab, the first conductive internal threads or the first conductive tab being a first electrical contact; and

the short inner socket comprising second conductive internal threads or a second conductive tab, the second conductive internal threads or the second conductive tab being a second electrical contact.

5. The lamp assembly of claim 1 , wherein:

the first and the second socket portions respectively comprise a tall outer socket and a short inner socket concentrically seated on a socket base;

the tall outer socket comprising conductive internal threads or a conductive tab, the conductive internal threads or the conductive tab being a first electrical contact; and

the lamp socket further comprises a second electrical contact located on the socket base within the short inner socket.

6. The lamp assembly of claim 1 , wherein the lamp socket comprises:

an Edison lamp socket comprising:

conductive internal threads being a first electrical contact;

a socket base; and

a second electrical contact on the socket base; and

an adapter ring screwed into the Edison lamp socket, the adapter ring comprising outer threads and defining a threaded hole exposing the second electrical contact.

7. The lamp assembly of claim 6 , wherein the adapter ring comprises a tamper proof element on the outer threads of the adapter ring to prevent removal of the adapter ring from the Edison lamp socket.

8. The lamp assembly of claim 1 , wherein the lamp socket comprises:

an Edison lamp socket comprising:

conductive internal threads being a first electrical contact;

a socket base; and

a second electrical contact on the socket base; and

an adapter screwed into the Edison lamp socket, the adapter comprising:

a ring comprising outer threads and defining a threaded hole exposing the second electrical contact; and

a sleeve screwed into the ring, the sleeve comprising inner and outer threads.

9. The lamp assembly of claim 8 , wherein the sleeve is conductive and comprises a top end that is open and a bottom end that is closed or has an extended portion to touch the second electrical contact of the Edison lamp socket.

10. The lamp assembly of claim 8 , wherein the sleeve is nonconductive and has open ends to expose the second electrical contact of the Edison lamp socket.

11. The lamp assembly of claim 8 , wherein the ring comprises a tamper proof element on the outer threads of the ring to prevent removal of the ring from the Edison lamp socket.

12. The lamp assembly of claim 1 , further comprising:

a light bulb with an Edison screw base having a screw thread contact and an electrical foot contact; and

an adapter, comprising:

a conductive, internally threaded socket-size sleeve screwed onto the Edison screw base;

a conductive, externally and internally threaded base-size sleeve screwed into the socket-size sleeve;

an insulator ring comprising outer threads and defining a threaded hole, the insulator ring being screwed into the base-size sleeve; and

a conductive screw base screwed into the threaded hole, the screw base comprising a top end to touch the electrical foot contact of the Edison screw base.

13. The lamp assembly of claim 1 , wherein the lamp socket comprises:

a conductive, internally and externally threaded outer sleeve, the outer sleeve forming the first socket portion;

a bottom base comprising inner threads and defining a threaded hole, the bottom base being screwed onto the outer sleeve, at least one of the inner threads and the bottom base being nonconductive;

a conductive, internally and externally threaded inner sleeve, the inner sleeve being screwed into the threaded hole of the bottom base, the inner sleeve forming the second socket portion; and

a conductive, externally threaded center plug being screwed into the inner sleeve.

14. The lamp assembly of claim 13 , wherein the lamp socket further comprises:

a nonconductive first T-shape sleeve comprising an internally threaded first lower portion, an internally threaded first upper portion, and a first ring between the first lower portion and the first upper portion, the first T-shape sleeve being screwed onto the outer sleeve;

a conductive, internally and externally threaded other outer sleeve, the other outer sleeve being screwed into the first T-shape sleeve, the first ring preventing the outer sleeve and the other outer sleeve from touching;

a nonconductive second T-shape sleeve comprising an internally threaded second lower portion, an internally threaded second upper portion, and a second ring between the second lower portion and the second upper portion, the second T-shape sleeve being screwed onto the inner sleeve; and

a conductive, internally and externally threaded other inner sleeve, the other inner sleeve being screwed into the second T-shape sleeve, the second ring preventing the inner sleeve and the other inner sleeve from touching.

15. The lamp assembly of claim 1 , further comprising:

a light bulb with a double screw base, comprising:

a conductive, internally and externally threaded outer sleeve, the outer sleeve forming an outer screw base;

a nonconductive top base comprising outer threads and defining a threaded hole, the top base being screwed into the outer sleeve; and

a conductive, externally threaded inner sleeve screwed into the threaded hole of the top base, the inner sleeve having a closed bottom end, the inner sleeve forming an inner screw base.

16. The lamp assembly of claim 15 , wherein the light bulb with the double screw base further comprises:

a nonconductive first T-shape sleeve comprising an externally threaded first lower portion, an externally threaded first upper portion, and a first ring between the first lower portion and the first upper portion, the first T-shape sleeve being screwed into the inner sleeve;

a conductive, internally and externally threaded other inner sleeve, the other inner sleeve being screwed onto the first T-shape sleeve, the first ring preventing the inner sleeve and the other inner sleeve from touching;

a nonconductive second T-shape sleeve comprising an externally threaded second lower portion, an externally threaded second upper portion, and a second ring between the second lower portion and the second upper portion, the second T-shape sleeve being screwed into the outer sleeve; and

a conductive, internally and externally threaded other outer sleeve, the other outer sleeve being screwed onto the second T-shape sleeve, the second ring preventing the outer sleeve and the other outer sleeve from touching.

17. An Edison lamp socket, comprising:

a cup-shape bottom base comprising an internally threaded sidewall and a bottom defining a threaded hole, at least one of the sidewall and the bottom being nonconductive;

a conductive, internally and externally threaded sleeve, the sleeve being screwed into the bottom base; and

a conductive, externally threaded center plug, the center plug being screwed into the threaded hole.

18. An Edison screw base, comprising:

a nonconductive base comprising external threads and defining a threaded hole;

a conductive threaded sleeve with outer threads and inner threads, the sleeve being screwed onto the base; and

a conductive, externally threaded center plug, the center plug being screwed into the threaded hole.