# US 8,786,460 B2 · Magnetically controlled warning lamp

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- Number: US 8,786,460 B2
- Document ID: US8786460B2
- Status: Granted
- Kind: B2
- Application number: 13/478,312
- Filed: 2012-05-23
- Published: 2013-11-28
- Granted: 2014-07-22
- Earliest claimed: 2012-05-23
- Applicants: Chun-Ming Huang
- Inventors: Chun-Ming Huang
- Web page: https://patentgrep.com/patent/US8786460B2

## CPC

- F21V 23/04: the elements being switches (safety devices F21V25/00)
- F21V 31/005: {Sealing arrangements therefor}
- F21W 2111/00: Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
- F21Y 2115/10: Light-emitting diodes [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A magnetically controlled warning lamp has a light module and a circuit board mounted in the body. The circuit board has a magnetic device, a control module and a power module. The power module provides the control module and the light module with a working voltage. The magnetic device is activated to generate a trigger signal by a magnetic field. The control module changes the operation mode for the light module based on the trigger signal. A user can use a magnet to activate the magnetic device to easily change the operation mode for the light module instead of disassembling the warning lamp.

## Claims

### Claim 1

A magnetically controlled warning lamp comprising:
a body having:
a base having:
a substrate having a top surface; and
a circular wall protruding from the top surface of the substrate and having:
an outer surface; and
an outer thread formed on the outer surface; and
a cover having an expansion terminal with an inner thread securely screwed on the outer thread of the circular wall, wherein a space is defined between the base and the cover when the cover is attached to the base;
a light module mounted in the space of the body and having at least one LED; and
a circuit board mounted in the space of the body and having:
a magnetic device generating a trigger signal in response to a magnetic field;
a control module providing multiple operation modes and electrically connected to the light module and the magnetic device to activate the light module to be operated in one of the operation modes based on the trigger signal; and
a power module electrically connected to the control module and the light module to provide a working voltage.

### Claim 2 (depends on 1)

The warning lamp as claimed in claim 1 further comprising a gasket, wherein:
the circular wall has a top surface and a groove formed in the top surface of the circular wall;
the gasket is mounted in the groove; and
the expansion terminal of the cover has a blocking surface that presses against the gasket when the cover is attached to the base.

### Claim 3 (depends on 2)

The warning lamp as claimed in claim 2, wherein the cover has an outer surface and multiple light guiding rings axially formed on the outer surface of the cover.

### Claim 4 (depends on 1)

The warning lamp as claimed in claim 1 further comprising an indication label formed on the outer surface of the circular wall and beside the magnetic device.

### Claim 5 (depends on 2)

The warning lamp as claimed in claim 2 further comprising an indication label formed on the outer surface of the circular wall and beside the magnetic device.

### Claim 6 (depends on 3)

The warning lamp as claimed in claim 3 further comprising an indication label formed on the outer surface of the circular wall and beside the magnetic device.

### Claim 7 (depends on 4)

The warning lamp as claimed in claim 4, wherein the light module comprises:
a rectangular pillar with four surfaces; and
four LEDs respectively mounted on the surfaces and above the circular wall.

### Claim 8 (depends on 5)

The warning lamp as claimed in claim 5, wherein the light module comprises:
a rectangular pillar with four surfaces; and
four LEDs respectively mounted on the surfaces and above the circular wall.

### Claim 9 (depends on 6)

The warning lamp as claimed in claim 6, wherein the light module comprises:
a rectangular pillar with four surfaces; and
four LEDs respectively mounted on the surfaces and above the circular wall.