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Publication numberUS3452215 A
Publication typeGrant
Publication date24 Jun 1969
Filing date26 Sep 1966
Priority date26 Sep 1966
Publication numberUS 3452215 A, US 3452215A, US-A-3452215, US3452215 A, US3452215A
InventorsEugene Alessio
Original AssigneeEugene Alessio
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Light bulb socket adapter
US 3452215 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

June 24, 1969 E ALESSK, 3,452,215

LIGHT BULB SOCKET ADAPTER Filed Sept. 26, 1966 Sheet of 2 INVENTOR. EUGENE ALESS/O E. ALESSIO June 24, '1969 LIGHT BULB SOCKET ADAPTER Sheet Fil ed Se t, 26, 1966 l l i l I 1 i l I l 1| 1| '1 :l JL

I NVE N TOR. EUGENE fiLESS IO ATTORNEY United States Patent O 3,452,215 LIGHT BULB SOCKET ADAPTER Eugene Alessio, 44 Kalda Lane, Plainview, NY. 11803 Filed Sept. 26, 1966, Ser. No. 582,050 Int. Cl. Gf 1/10; H05b 41/16, 41/24 US. Cl. 307-146 1 Claim ABSTRACT OF THE DISCLOSURE The present invention relates to a light bulb socket adapter, and more particularly, to an adapter which is intended to be placed between a light bulb and its socket and which regulates and varies the intensity of illumination of the light bulb.

It is a primary object of this invention to provide a light bulb socket adapter which may be screwed into any light bulb socket, as, for example, sockets in lamp light fixtures, and into which may be placed a light bulb.

It is also an object of this invention to provide a light bulb socket adapter which can continuously vary the voltage phase and current flow supplied to the bulb.

It is another object of this invention to provide a light bulb socket adapter which may be adjusted to provide any desired wattage to a light bulb from zero up to the capacity of the bulb.

It is still another object of the present invention to provide a light bulb socket adapter which can change the degree of illumination of a bulb from zero up to the full illumination capacity of the bulb.

It is a further object of the present invention to provide an adapter for a light bulb socket which will permit the intensity of the light bulb to be continuously varied and, when set at a particular intensity, to maintain that intensity.

Basically, and not by way of limitation, the present invention comprises an adapter which may be screwed into a light bulb socket, which itself has a secondary light bulb socket and which has electronic circuitry designed to change the light bulb illumination intensity In the drawing:

FIGURE 1 is a front view of a light bulb socket adapter in accordance herewith.

FIGURE 2 is a partial cross-sectional view taken across line 2--2 of FIGURE 1.

FIGURE 3 is a top view of the light bulb socket adapter shown in FIGURE 1.

FIGURE 4 is an enlarged view of a portion of FIG- URE 2 showing in detail the control knob and potentiometer therein.

FIGURE 1 is a fragmentary cross-sectional view taken across line 5-5 of FIGURE 3.

FIGURE 6 is a schematic circuit diagram of the light bulb socket adapter in accordance herewith.

Referring to the drawing, the light bulb socket adapter 10 is comprised of two molded shells 12 and 14 which when joined together form a generally cylindrical hollow housing with an upper portion 16 and a lower portion 18 having an external thread. Screwed onto the external thread of lower portion 18 is a metal base sleeve 20 which has strandard light bulb thread so as to enable socket adapter 10 to be screwed into a standard light bulb socket which is connected to a standard A.C. power source. Placed within upper portion 16 of socket adapter 10 is an upwardly opening internally threaded secondary light bulb socket 22 which is adapted to receive standard light bulbs. Shells 12 and 14 may be molded from any suitable electrically insulating material such as a phenolic or other plastic.

A control knob 24 is mounted on a common shaft 26 with a variable potentiometer 28, control knob 24 thereby controlling potentiometer 28. Shaft 26 passes through the side wall of shell 14, potentiometer 28 being disposed in a cavity 29 molded into the side wall of shell 14. Cavity 29 is form-fitted to and prevents rotation of potentiometer 28 with respect to shaft 26.

A lower electrical contact 30 protrudes from the bottom center of lower portion 18 and an upper electrical contact 32 is centrally disposed within secondary light bulb socket 22.

The electrical circuit 33 shown in FIGURE 6 is primarily a phase shifting circuit which has four basic functional portions which are the potentiometer 28, a time delay network 34, an output switch 36 and a radio frequency interference filter 38, circuit 33 being in series with base sleeve 20 and secondary socket 22. Lower contact 30 and upper contact 32 directly connected to each other.

Potentiometer 28 controls the voltage phase angle and current flow to secondary socket 22 by its impedence value as selected by control knob 24, a zero impedence not changing the phase thereby permitting full current flow and hence full light bulb intensity and a high impedence substantially changing the phase thereby yielding only slight current flow and hence low light bulb intensity.

The time delay network 34 generates a trigger or gate when the current fiow reaches a particular value as determined by the impedence of potentiometer 28. The trigger or gate is generated by the avalanche mode element, when the resistive-capacitive charging voltage reaches the firing threshold of the element. The trigger or gate thereby generated is applied to and energizes output switch 36 and turns on a light bulb which is screwed into secondary socket 22. Output switch 36 preferably is a gate controlled full wave A.C. silicon switch that switches from a blocking state to a conducting state for either polarity of applied A.C. voltage.

Output switch 36 receives a trigger or gate from time delay network 34 for each half cycle of the applied AC source voltage and de-energizes when each half cycle of the applied AC source voltage returns to zero.

Interference filter 38, which i connected between base sleeve 20 and upper contact 32, supresses high frequency interference and noise which has developed as a result of the fast switching or energization of output switch 36.

The foregoing provides a socket adapter with the capability of continuous light bulb intensity control from zero intensity to full intensity and also of providing a stable operation at any given intensity level.

Molded shells 12 and 14 may be keyed into mutual alignment by molding therein suitable mating grooves and bosses not shown in the drawing. Shells 12 and 14 may be joined in any suitable manner such as by binding, Welding or by use of an adhesive compound. An insulating spacer 40 may be placed between potentiometer 28 and secondary socket 22 to prevent shorting therebetween. Shaft 26 may be provided at one end with an enlarged head portion 26a and at the opposite end with an expanded flange 26b so as to position and secure potentiometer 28, shell 14 and control knob 24 thereon. Flange 26b may be provided with a decorative cover 41. An insulating washer 42 may be placed between shell 14 and control knob 24. A dielectric disk 44 may be provided to support and insulate upper contact 32. If desired a hole 46 may be provided in disk 44 to allow a suitable potting compound, such as an epoxy compound, to be inserted below disk 44 to pot or encapsulate the elements of circuit 33.

While the foregoing is illustrative of a preferred form of this invention it is clear that modifications and other forms may be provided within the spirit of the invention and the scope of the claim.

What is claimed is;

1. A light bulb socket adapter, comprising:

(A) a housing, said housing having a threaded base portion for insertion into and electrical contact with a first light bulb socket which is connected to a power source and a second light bulb socket for threaded receipt of and electrical contact with a light bulb;

(B) a phase shifter circuit, said phase shifter circuit being electrically disposed between said first and said second sockets, said phase shifter circuit comprising:

(i) a variable potentiometer; (ii) a time delay network, said time delay network receiving the output of said variable potentiometer and comprising;

(a) a resistive-capacitive charging circuit;

and (b) an avalanche mode element being con- 4 said resistive-capacitive charging circuit for generation of a gate output; and (iii) an output switch, said output switch comprising:

(a) a full wave AC silicon switch, said full Wave AC silicon switch being connected to said time delay network for receipt of and control by said gate output; and (C) an interference filter.

References Cited UNITED STATES IATl-ETQ'TS H 3,388,294 6/1968 Davis 32322 X ROBERT K. SCHAEFER, Primary Examiner. T. B. JOIKE, Assistant Examiner.

- U.S. Cl. X.R.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3388294 *21 Sep 196511 Jun 1968Ariel R. DavisSaturable reactor dimmer
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3543088 *7 May 196824 Nov 1970Bennett C GarrettVariable light dimming adaptors for incandescent bulbs
US3617766 *25 Sep 19692 Nov 1971Fedtro IncRectifier for extending the life of light bulbs
US4570107 *21 Dec 198311 Feb 1986Lee Yong JLighting control device
US4632490 *21 Nov 198530 Dec 1986Tri-Lite Electronics, Inc.Touch control connector for lamps
US5121287 *12 Mar 19909 Jun 1992Wade LeeReceiver/adapter for lamp control
US66431583 Dec 20014 Nov 2003Mobility Electronics, Inc.Dual input AC/DC to programmable DC output converter
US665056022 Aug 200218 Nov 2003Mobility Electronics, Inc.Dual input AC and DC power supply having a programmable DC output utilizing single-loop optical feedback
US67008088 Feb 20022 Mar 2004Mobility Electronics, Inc.Dual input AC and DC power supply having a programmable DC output utilizing a secondary buck converter
US675110931 May 200215 Jun 2004Mobility Electronics, Inc.Dual input AC/DC/ battery operated power supply
US677516312 Sep 200310 Aug 2004Mobility Electronics Inc.Dual input AC/DC to programmable DC output converter
US67918537 Mar 200314 Sep 2004Mobility Electronics, Inc.Dual input AC/DC power converter having a programmable peripheral power hub module
US690395018 Jul 20037 Jun 2005Mobility Electronics, Inc.Programmable power converter
US69374901 Mar 200430 Aug 2005Mobility Electronics, Inc.Dual input AC and DC power supply having a programmable DC output utilizing a modular programmable feedback loop
US764662026 Aug 200512 Jan 2010Igo, Inc.AC/DC power converter
US82132041 Apr 20093 Jul 2012Comarco Wireless Technologies, Inc.Modular power adapter
US832858211 Dec 2012MagicLux, LLCShortened adapter for light bulb sockets with miniature remote controller
US835476028 Oct 200915 Jan 2013Comarco Wireless Technologies, Inc.Power supply equipment to simultaneously power multiple electronic device
US850814827 Jan 201013 Aug 2013MagicLux, LLCSystem for light and appliance remote control
US913581216 Nov 201215 Sep 2015MagicLux, LLCMiniature remote controller
US20040085793 *18 Jul 20036 May 2004Ejaz AfzalProgrammable power converter
US20040170039 *1 Mar 20042 Sep 2004Mobility Electronics Inc.Dual input AC and DC power supply having a programmable DC output utilizing a secondary buck converter
US20060007715 *26 Aug 200512 Jan 2006Mobility Electronics Inc.AC/DC power converter
EP0056104A1 *30 Oct 198121 Jul 1982Steinel GmbH & Co. KGOrientation lamp
U.S. Classification307/146, 315/287, 315/DIG.400, 315/208, 315/199, 323/905
International ClassificationH05B39/08, H01R33/94
Cooperative ClassificationY10S315/04, H05B39/083, Y10S323/905, H01R33/94
European ClassificationH01R33/94, H05B39/08R