Christmas tree lighting control

• US 4,057,735 A
• Filed: 12/02/1975
• Issued: 11/08/1977
• Est. Priority Date: 01/21/1975
• 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): Schaefer, Robert K.
• Assistant Examiner(s): Indyk, Eugene S.
• Application Number:
  US05/637,025
• Time in Patent Office: 707 Days
• Field of Search: 307/11, 307/133, 307/106, 315/185 S, 315/200 A, 315/317, 323/34, 323/94
• US Class Current: 307/11
• CPC Class Codes: H01H 3/004 for operating contacts periodically
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources

Abstract

This invention relates generally to ornamental lighting controls and particularly to a lighting control for Christmas tree lighting having preferably at least four duty cycle outputs and wherein the duty cycle patern of each output differs, with respect to a predetermined time interval, from the duty cycle patern of each of the other outputs of the control thereby to produce, in a plurality of ornamental lighting strings respectively connected to the outputs of the control, a coordinated condition of continuously changing light intensities between strings and that occur in predetermined sequential time differing order to result in an overall lighting effect totally unobtainable by any other form of light controlling apparatus.

Claims

1. An ornamental lighting control including in combination a plurality of solid state duty cycle units having a common input and respective variable duty cycle outputs, connector means respectively connected to each duty cycle output for connecting thereto an ornamental lighting source with the duty cycle rate of said output determining the light output intensity of a lighting source connected therewith, control means for varying gradually and in a predetermined random and in respectively differing order, the duty cycle rate of each duty cycle unit whereby the light output intensity pattern of each lighting source respectively connected to each output differs from the other for a predetermined operating interval of the units.

2. An ornamental lighting control as claimed in claim 1 wherein each duty cycle unit includes an RC gating circuit with the resistance valve of the gating circuit resistor determining the duty cycle of the unit and light output intensity of a lighting source connected therewith, and wherein said control includes means for varying in gradual and predetermined random and differing order with respect to each other the resistance value of each gating circuit resistor in each R.C. circuit.

3. A lighting control as claimed in claim 1 wherein the respective duty cycle outputs of the unit of the control will never reduce the light output intensity of a lighting source connected therewith to below an incandescent state.

4. An ornamental lighting control including at least two solid state duty cycle units having a common power input and respectively variable duty cycle outputs, connector means respectively connected to each of said outputs for connecting thereto an ornamental lighting source to be controlled and wherein the duty cycle of said outputs determines the light output intensity of a lighting source connected therewith, motor means, control means movable by said motor means to effect predetermined random variations in the duty cycle of each duty cycle unit whereby the light output intensity pattern of each lighting source, respectively connected to each duty cycle unit, differs from each of the others for a predetermined operating interval of said control means.

5. An ornamental lighting control as claimed in claim 4 wherein each duty cycle unit includes an RC gating circuit with the resistance value of the gating circuit resistor in each duty cycle unit determining the duty cycle of the unit and the duty cycle of the output connected therewith and wherein the means movable by said motor means operates to randomly vary in predetermined gradual and differing order, the resistance value of each gating circuit resistor in each of the said duty cycle units.

6. A control as claimed in claim 4 wherein the light intensity output of a lighting source connected to a duty cycle output of the control is never reduced below an incandescent state.

7. An ornamental lighting control including at least four duty cycle units haivng a common input and respectively variable duty cycle outputs, connector means respectively connected to each said duty cycle output for connecting thereto a lighting source to be controlled with the duty cycle of each output determining the light output intensity of a lighting source connected therewith, control for varying in gradual and predetermined random and differing order with respect to each other the duty cycle of each output to produce random variations in the light output intensities of each lighting source respectively connected to each output.

8. An ornamental lighting control as claimed in claim 7 wherein no duty cycle output of any unit shall reduce the light output intensity of a lighting source connected therewith by greater than 80 percent from full brightness.

9. A control as claimed in claim 7 wherein the light intensity of an incandescent lighting source, connected to the duty cycle output of the control, is never reduced below an incandescent state.