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Patent for Sale:

Reliable and Simple Pin Safety Solution for LED-Tubes    

This patented safety solution for LED tubes can avoid electric shocks during insertion into fluorescent lampholders, and can be operated without any problems in the installed state in the lampholder.

Overview

When fitting or dismantling an LED light fitting, the user may suffer an electric shock at an exposed contact if the lampholder has not been disconnected from the voltage supply. Where there are two contact sections arranged opposite one another for insertion into corresponding fluorescent lampholder bases of a lamp, this may be caused by only one of two contact sections being connected to the corresponding lampholder base.

This linear LED-Tube features a centring system and two safety rotary switches that prevent electrical shock during installation of LED lighting into existing fluorescent fixtures.

For the professional installer, the LED-Tube is intuitive to use: allowing the existing starter, ballast and wiring to remain in place, saving time and labor. The patented invention prevents any electrical current form energizing the light tube before it is completely installed in the lampholder. Only a few LED-Tube features a design that is safe and easy to use.

The invention is designed to replace conventional fluorescent lamps (T8 & T12) utilizing the existing Tombstone T8/T12 turn-type shunted & non-shunted lampholders. They are ideal for office, hallway, and garage parking structures and hard to reach locations that require 24-hour lighting. Low energy consumption along with no maintenance equals excellent savings for the life of the light.

Primary Application of the Technology

Fluorescent lighting is universal; billions of these tubes can be found in warehouses, retail facilities and other large commercial spaces across the globe. Look up, and you’ll likely find these familiar tubes lining the ceilings of many facilities. More than 60 percent of artificial light is being generated today by fluorescent tube.

But linear fluorescent tubes have largely reached their maximum technological potential. In contrast, LED lighting is rapidly evolving and providing an alternative to linear fluorescent tubes. Building and facility managers are adopting LED lighting for its long life span, energy efficiency and controllability.

However in the past few years LED lighting technology has been rapidly developed. LED (Light emitting diode) is a new technology that has become more energy efficient compared to fluorescent tube giving more light- Lumens/watt. As LED technology is rapidly increasing, LED Tube retrofit is emerging as an attractive business to the lighting industry from past years.

The Problem Solved by the Technology

Normal fluorescent tube lamps are safe due to the fact that the gas inside the tube first has to be ignited (combination of starter and ballast or HF generated high voltage) before there is a conductive path between the two connections on the end of the tube. This safety is necessary when the tube is being installed into a fixture while the voltage is not disconnected from the mains. But in case of using this newly designed LED-Tube (retrofit) lamps there is a conductive path between the two ends (the electronics) of the tube and safety is not guaranteed. Electronics are not considered as a proper isolation for safety.

When fitting or dismantling a LED-Tube in or from the corresponding lampholder, the user may suffer an electric shock at an exposed contact if the lampholder has not been disconnected from the voltage supply. In the case of LED-Tubes with two contact sections arranged opposite one another for insertion into corresponding lampholder bases of a lamp, this may be caused by only one of two contact sections being connected to the corresponding lampholder base. However, an electric shock is also possible at an individual contact section when said contact section has at least one accessible contact and one contact which is connected to the voltage source. This is so-called "side-immanent" formation of parasitic voltages.

How the Technology Solves the Problem

This safety problem is solved by the invention in that a contact section for insertion into a lampholder base, comprising two contact pins and a centering apparatus arranged centrally between the contact pins for centering the LED-Tube in the lampholder, is provided, and in that the centering apparatus is rotatable about a main axis of the light-emitting means for actuation of a rotary switch inside the LED tube.

If the LED-Tube is inserted into a conventional lampholder for operation of fluorescent lamps, the centering apparatus is necessarily rotated and therefore the rotary switch for avoiding formation of parasitic voltages is necessarily switched. This forced switching during insertion and initial operation of the LED-Tube will be used to bring the LED tube into the desired switching states to protect the user from a formation of parasitic voltages or an electric shock.

LED-Tubes can be powered in lampholders for fluorescent lamps from either one end or two ends. The safety concern solved by the invention is with regard to one end and two end powered tubes.

Competitive Advantage

The advantages of this innovative technology speak for itself:

1. Very low manufacturing costs.

2. Easy and simple assembly.

3. The design is simple and completely mechanical, making it robust and very reliable.

4. The invention will work with actual tombstones lampholders which have a slot within them.

Just a small drawback is that the LED-Safety-G13-T8-T12 solution will not fit with the old style lampholders which have only got two pin holes at each side. But this only concerns the market of retrofit equipment. The existing starter can be left in place or removed from the lampholder; it will work in either situation.

For adapted luminaires the lamp manufacturer will just have to change the lampholder in the luminaire production. So an expensive development of a new luminaire will be avoided. It is only necessary to reexecute a type examination test.Furthermore, it will not become any longer necessary to assemble a fluorescent lamp ballast and starter. This will save time and money, and the lamp manufacturer will soon become much more competitive than companies which still have their old production line.

The seller may consider selling these patents individually.

Additional Information

An article from LED Magazine in 2014 evaluates the photometric, electrical, and financial hurdles to retrofitting linear fluorescent lamps with LED-based tubes, including both plug-and-play products and tubes that require rewiring.

> http://www.ledsmagazine.com/articles/print/volume-11/issue-6/features/led-tubes/how-do-plug-and-play-t8s-stack-up-against-ballast-bypass-led-lamps.html
View this listing on the Tynax website: www.tynax.com/listing/6160