Christmas tree lighting control

• US 3,946,244 A
• Filed: 01/21/1975
• Issued: 03/23/1976
• Est. Priority Date: 11/23/1973
• Status: Expired due to Term

• Current Assignee: George B. Davis Jr
• Original Assignee: George B. Davis Jr
• Inventors: Davis, George B. Jr.
• Primary Examiner(s): Hohauser, Herman J.
• Application Number:
  US05/542,803
• Time in Patent Office: 427 Days
• Field of Search: 307/11, 307/31, 307/35, 315/185 S, 315/192, 315/121, 315/123, 315/126, 315/127, 315/128, 323/96
• US Class Current: 307/31
• CPC Class Codes: G04C 23/00 Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals if restricted to producing acoustic time signals by electrical means G04C21/00; mechanical alarm clocks G04B23/02; apparatus which can be set and started to measure-off predetermined intervals G04F3/06; time or time-programme switches which automatically terminate their operation after the programme is completed H01H43/00
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources

Abstract

A Christmas tree lighting control wherein predetermined voltage changes and changes in the duty cycle of the A-C source is applied individually and in a predetermined sequential order to all the lights of a tree to produce a twinkling and shimmering effect heretofore unobtainable by any form or combination of conventional flasher apparatus.

Claims

1. A light intensity control for Christmas tree lighting including in combination connector means for connecting said control to a power supply source, a plurality of electrical outlets for receiving therein one or more strings of Christmas tree lights, a plurality of electrical circuits respectively connecting said outlets with said connector, voltage dropping resistor means, respectively connected in each of said connector circuits, rectifier means respectively connecting in each of said connector circuits, motor means, contact means movable by said motor means to intermittently short out, in predetermined sequence, said resistor means and said rectifier means to alter in predetermined increments voltage applied from said connector to said outlets.

2. A light intensity control as claimed in claim 1 wherein said contact means movable by said motor means is in the form of spring contact fingers connected respectively to the terminals of each of said resistor means and rectifier means and movable into and out of their respective shorting positions by rotation of cam means driven by said motor means.

3. A light intensity control as claimed in claim 1 wherein a circuit interrupting thermal overload is electrically interposed between the connector and each of said outlets.

4. A light intensity control for Christmas tree lighting including in combination connector means for connecting said control to a power supply source, a plurality of electrical outlets for connecting to said control one or more strings of Christmas tree lights, individual circuit means connecting said outlets with said connector means, voltage dropping resistor means connected within each said individual circuits to said outlets, half wave rectifier means connected in each of said individual circuits to said outlet and electrically connected in series with said resistor means, a motor drive, means movable by said motor drive to intermittently short out, in predetermined timed sequence, said resistor means and said rectifier means connected within said individual outlet circuits to vary in predetermined fixed increments and in timed spaced relation the power characteristics to said outlets.

5. A light intensity control as claimed in claim 4 wherein the means movable by said motor drive for sequentially shorting out the resistor means and rectifier means within said outlet circuits, is in the form of a rotating cam driven by said motor drive and operative to intermittently close contact members connected to the respective terminals of said resistor means and said half wave rectifier means.

6. A device as claimed in claim 4 wherein the voltage characteristics to said outlets is never decreased by greater than 80 percent of the supply voltage.

7. S light intensity control as claimed in claim 4 wherein a circuit interrupting thermal overload is electrically interposed between said connector and each of said outlets.

8. A light intensity control for Christmas tree lighting including in combination connector means for connecting said control to a power supply source, an electrical outlet electrically in circuit with said connector for connecting with the latter one or more strings of Christmas tree lights, voltage dropping resistor means connected in series between said connector and said outlet, half wave rectifier means connected in series with said resistor, a motor drive, cam means driven by said motor drive, contact members movable into and out of electrical engagement by movement of said cam means and connected to intermittently short out said resistor means, contact members movable into and out of electrical engagement by movement of said cam means and connected to intermittently short out said half wave rectifier means with the resistor and rectifier shorting operations occuring in predetermined sequential order to alter in predetermined fixed increments the light intensity output of a lighting string connected to said outlet.

9. A light intensity control as claimed in claim 8 wherein the operation of said cam means, effecting the intermittent shorting out of said resistor means and rectifier means, occurs in predetermined time differing relation with respect to the intermittent shorting out of said resistor means.

10. A light intensity control as claimed in claim 8 wherein a thermal overload connected in series with said resitor and operative upon a predetermined heating of said resistor to interrupt the circuit through said resistor.

11. A light intensity control as claimed in claim 8 wherein the power output of said control is never reduced to a value that could reduce the light intensity output of a lighting string connected therewith to less than 80 percent of full brightness.