US5263570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor belt emergency stop indicator light system
Assignee: Tata Chemicals North America Inc
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Filing: 1992-08-31
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Granted: 1993-11-23
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Expires: 2012-08-31
Abstract
Abstract A system and method is provided for expeditiously locating an emergency situation of a conveyor. An emergency switch is connected to a conveyor to indicate an emergency situation. When the emergency switch indicates an emergency situation, a light is illuminated by an indicator circuit. The indicator light system allows an emergency situation to be easily observed at a distance from the conveyor.
Inventors
- 👤 Wayne Stonemark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:34
CPC Classifications
B; B65; B65G; B65G43/00; B65G43/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
131 words
A light indicator system comprising a plurality of lights positioned at various locations along the length of a conveyor for expeditiously locating in emergency situation of the conveyor, said conveyor being connected to an emergency switch for each indicator light, said emergency switch indicating said emergency situation of said conveyor, said system comprising: an indicator circuit connected to each of said emergency switches, said indicator circuit comprising a bridge rectifier which connects said indicator circuit to an emergency switch, and being activated when said emergency switch indicates said emergency situation, a resistor connected in series with said bridge rectifier and light means comprising at least one light emitting diode connected to said at least one indicator circuit, wherein said light means is illuminated when said emergency switch indicates said emergency situation.
Claim 2
Dependent Claim
131 words
A light indicator system comprising a plurality of lights positioned at various locations along the length of a conveyor for expeditiously locating in emergency situation of the conveyor, said conveyor being connected to an emergency switch for each indicator light, said emergency switch indicating said emergency situation of said conveyor, said system comprising: an indicator circuit connected to each of said emergency switches, said indicator circuit comprising a bridge rectifier which connects said indicator circuit to an emergency switch, and being activated when said emergency switch indicates said emergency situation, a resistor connected in series with said bridge rectifier and light means comprising at least one light emitting diode connected to said at least one indicator circuit, wherein said light means is illuminated when said emergency switch indicates said emergency situation.
Claim 3
Dependent Claim
47 words
The light indicator system of claim 1 further comprising a housing for housing said indicator circuit, said housing including a top surface and at least one side surface, said at least one side surface extending upwardly above said top surface and having at least one hole therein.
Claim 4
Dependent Claim
22 words
The light indicator system of claim 2 further comprising at least one indicator integrated circuit board for each of said indicator circuits.
Claim 5
Dependent Claim
22 words
The light indicator system of claim 3 wherein said indicator integrated circuit board is mounted inside said housing with a sealing compound.
Claim 6
Dependent Claim
26 words
The light indicator system of claim 4 wherein said conveyor is housed in a conveyor tunnel and said indicator circuit is housed in a vehicle tunnel.
Claim 7
Dependent Claim
45 words
The light indicator system of claim 5 wherein one of said light emitting diodes is attached to one side of said indicator integrated circuit board and another one of said light emitting diodes is attached to the other side of said indicator integrated circuit board.
Claim 8
Dependent Claim
12 words
The light indicator circuit of claim 6 wherein said housing is transparent.
Claim 9
Dependent Claim
65 words
The light indicator circuit of claim 6 housing wherein one of said light emitting diodes is attached to a first LED integrated circuit board and another one of said light emitting diodes is attached to a second LED integrated circuit board, said indicator integrated circuit board being positioned between said first and second LED integrated circuit board, said light emitting diodes protruding through said housing.
Claim 10
Independent Claim
105 words
A method for expeditiously locating an emergency situation of a conveyor, using a plurality of indicator lights positioned at various locations along the length of the conveyor, said conveyor including an emergency switch attached thereto for indicating said emergency situation of said conveyor, said method comprising: activating an indicator circuit comprising a bridge rectifier that connects said indicator circuit to said emergency switch through a resistor connected in series with said bridge rectifier when said emergency switch indicates said emergency situation, said indicator circuit including a light means comprising a light emitting diode, and illuminating said light means in response to said activated indicator circuit.
Claim 11
Independent Claim
105 words
A method for expeditiously locating an emergency situation of a conveyor, using a plurality of indicator lights positioned at various locations along the length of the conveyor, said conveyor including an emergency switch attached thereto for indicating said emergency situation of said conveyor, said method comprising: activating an indicator circuit comprising a bridge rectifier that connects said indicator circuit to said emergency switch through a resistor connected in series with said bridge rectifier when said emergency switch indicates said emergency situation, said indicator circuit including a light means comprising a light emitting diode, and illuminating said light means in response to said activated indicator circuit.
Claim 12
Dependent Claim
30 words
The method of claim 9 further comprising the step of: mounting said indicator circuit in a housing, the top of said housing including an upwardly extending surface, having holes therein.
Claim 13
Dependent Claim
25 words
The method of claim 10 wherein said conveyor is housed in a conveyor tunnel and said light indicator circuit is mounted in a roadway tunnel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-22 | 1997-05-24 | 1997-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-22 | 2001-05-24 | 2001-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-22 | 2005-05-24 | 2005-11-23 | $7700.00 | Window Closed / Lapsed |