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Intrinsically-safe roof hazard alert module

Imported: 23 Feb '17 | Published: 22 Oct '02

William D. Mayercheck, Albert L. Brautigam

USPTO - Utility Patents

Abstract

A light weight, self-contained, portable, intrinsically-safe warning device for providing warning to personnel of an unsafe condition is provided. This warning device is especially adapted for attachment to the roof of a mine to indicate unsupported roof conditions or other unsafe conditions. This intrinsically-safe warning device has (a) a case having side walls, a first end wall, and second end wall wherein the case has an internal cavity formed by the side walls and first and second end walls; (b) a low-voltage power supply within the case comprising one or more direct current batteries; (c) a switch in electrical contact with the low-voltage power supply to activate the module; (d) a light-emitting diode in electrical contact with the switch and the low-voltage power supply, and (e) a means to attach the module in close proximity to or in a hazard area having a potential hazard such that the light is directed towards the area from which personnel are likely to enter the hazard area, wherein the module is lightweight, portable, and intrinsically-safe; whereby, when the module is activated, the light-emitting diode emits a light to warn personnel in the area of the potential hazard and direct their attention to the potential hazard. This device is especially useful in underground mining operations in order to discourage miners from going into unsupported mine roof areas by rendering the attendant hazard more evident, directing the miner's attention to an appropriate warning message on the device, and thus avoiding the hazard beyond the device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates one embodiment of the intrinsically-safe hazard alert module showing possible locations for the switch, light, and batteries within the case.

FIG. 2 illustrates a preferred embodiment of the intrinsically-safe hazard alert module showing front and side view of the case and a side view of the cover plate. This embodiment is especially adapted for use as a roof hazard alert module in underground mining operations.

FIG. 3 illustrates the assembled intrinsically-safe hazard alert module of FIG. 2 in front and side views.

FIGS. 4 and 5 illustrate several circuit diagrams suitable for the intrinsically-safe hazard alert modules of this invention.

Claims

1. An intrinsically-safe hazard alert module for warning personnel of a potential hazard, said module comprising:

2. A module as defined in claim 1, wherein the light-emitting diode is a flasher-type.

3. A module as defined in claim 2, wherein the low-voltage power supply contains at least two batteries of about 2 to 10 volts.

4. A module as defined in claim 2, wherein the light-emitting diode flashes at a rate of about 1 to 5 pulses per second.

5. A module as defined in claim 1, wherein the low-voltage power supply contains at least two batteries of about 2 to 10 volts.

6. A module as defined in claim 1, wherein the case is sealed to prevent the entry of water and/or dust into the case.

7. An intrinsically-safe roof hazard ale module for warning personnel of a potential hazard in an underground mine, said module comprising:

8. A module as defined in claim 7, wherein the attachment means allows the module to be attached to a roof bolt.

9. A module as defined in claim 7, wherein the low-voltage power supply contains batteries of about 2 to 10 volts and wherein the light-emitting diode flashes at a rate of about 1 to 5 pulses per second.

10. A module as defined in claim 9, wherein the case is sealed to prevent the entry of water and/or dust into the case.

11. A hard alert module for warning personnel of a potential hazard in a hazard area, the module comprising:

12. The module as defined in claim 11, wherein the case has an outer wall defining a recess, and an operator for the switch extending through the outer wall and positioned in the recess.

13. The module as defined in claim 11, wherein the case has an outer wall defining a recess, and the light-emitting diode extends through the outer wall and is positioned in the recess.

14. The module as defined in claim 11, further comprising a magnet for magnetically attaching the module to a structure.

15. A hazard alert module for warning personnel of a potential hazard in a hazard area; the module comprising:

16. The module as defined in claim 15, wherein the outer wall further comprises a second recess, the light-emitting diode being positioned in the second recess.

17. The module as defined in claim 15 further comprising a magnet for magnetically attaching the module to a structure.