Fire door system
First Claim
Patent Images
1. A fire door system for simultaneously closing at least two retractable fire doors, said system comprising:
- at least two fire door assemblies, each comprising a fire door having a fixed surface proximate thereto, an activatable operator connected to said fire door for closing said fire door when said operator is activated, and a temperature sensing means, each of said temperatures sensing means being connected between the fixed surface proximate said fire door and its respective activatable operator for activating said operator when a temperature exceeding a predetermined value is sensed by said temperature sensing means; and
a stationary circuit connected to said activatable operators, said circuit in response to activation of one operator, activating the other operator thereby closing the fire door connected to said other operator.
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Accused Products
Abstract
A fire door system comprising first and second fire door assemblies each assembly including a fire door, a temperature sensing device and an operator. The operators of each of the assemblies are electrically interconnected such that when the fire doors simultaneously close when either (a) the temperature sensing device senses that the ambient temperature exceeds a predetermined value or (b) the circuit between the operators of the assemblies is deactivated.
34 Citations
13 Claims
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1. A fire door system for simultaneously closing at least two retractable fire doors, said system comprising:
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at least two fire door assemblies, each comprising a fire door having a fixed surface proximate thereto, an activatable operator connected to said fire door for closing said fire door when said operator is activated, and a temperature sensing means, each of said temperatures sensing means being connected between the fixed surface proximate said fire door and its respective activatable operator for activating said operator when a temperature exceeding a predetermined value is sensed by said temperature sensing means; and a stationary circuit connected to said activatable operators, said circuit in response to activation of one operator, activating the other operator thereby closing the fire door connected to said other operator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A fire door system for closing a retractable fire door mounted in an opening, the opening having first and second sides, said system comprising:
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a fire door assembly mounted on a first side of an opening, said assembly comprising a fire door, a first activatable operator connected to said fire door for closing said fire door when said operator is activated, and a temperature sensing means connected between a fixed surface and said operator for activating said operator when a temperature exceeding a predetermined value is sensed by said temperature sensing means; a second operator distally mounted relative to said fire door assembly; a second temperature sensing means being operably connected to said second operator; and a stationary circuit connected between the first and second operators such that when said fire door is in an opened retracted position, said fire door moves to a closed position when either of the temperature sensing means senses that the ambient temperature exceeds a predetermined value, or when the circuit means is deactivated. - View Dependent Claims (13)
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Specification