Elevator call button/annunciator assembly and circuit
First Claim
1. An electrical circuit for an elevator system, comprising:
- a call button/annunciator assembly having a button and a lamp;
a transformer for stepping down an AC mains voltge level from an AC mains supply for developing an output voltage at a first level; and
,switch means coupled to said lamp and to said transformer and responsive to a signal from said button at said AC mains voltage level for energizing said lamp at said stepped down first level.
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Accused Products
Abstract
A vibration-resistant elevator call button/annunciator assembly comprises: a switch housing defining an interior cavity and apertures opening into the cavity; a switch mounted in the housing; a switch actuating member movably disposed in the cavity; a resilient member for urging the actuating member into an unactuated position in the cavity; and, a light module for illuminating the actuating member mounted through a wall of the housing. The light module preferbly snap fits in an aperture in the housing, the wedge-based lamp being press fitted into a receptacle in the module. An electrical circuit for utilizing the modular assembly as an elevator call button/annunciator assembly comprises: a voltage stepdown transformer having a primary winding adapted for coupling to an AC mains supply and having a secondary winding for developing an output voltage at a first level; a switch coupled to the secondary winding; and, a lamp mounted in a switch housing and coupled to the switch for illuminating a call button/annunciator responsive to actuation of the switch, the lamp having a voltage rating greater than the first level. The switch may be actuated by engagement of the call button. The lamp may be a T-3 1/4 wedge-based lamp, having a voltage rating greater than the output voltage lelvel.
25 Citations
16 Claims
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1. An electrical circuit for an elevator system, comprising:
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a call button/annunciator assembly having a button and a lamp; a transformer for stepping down an AC mains voltge level from an AC mains supply for developing an output voltage at a first level; and
,switch means coupled to said lamp and to said transformer and responsive to a signal from said button at said AC mains voltage level for energizing said lamp at said stepped down first level. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An elevator call button/annunciator assembly and control system, comprising:
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an electrical box; at least one call button assembly mounted in said box; an indicator lamp mounted in said box; a transformer for stepping down voltage from an AC mains supply voltage level to a lower voltage level for driving said indicator lamp; a relay having contacts coupled for supplying said lower voltage level to said lamp and a having coil for actuating said contacts; and
,a central controller coupled to said coil and to said at least one push button assembly, and responsive to a button-actuated signal at said AC mains supply voltage level, for energizing said lamp at said lower voltage level. - View Dependent Claims (9, 10, 11)
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12. An electrical circuit for an elevator call button/annunciator assembly, comprising:
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a solid state switching device operable in a range of phase angles; means for controlling said phase angle of said device for stepping down an AC mains voltage level from an AC mains supply for developing an output voltage at a first level; and
,a call button/annunciator assembly having a lamp coupled to said switching device and having a button, said switching device being responsive to a signal from said button at said AC mains voltage level, for energizing said lamp at said first level. - View Dependent Claims (13, 14, 15, 16)
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Specification