Escalator handrail guard warning device

Details Escalator handrail guard warning device Escalator handrail guard warning device

1990-05-23

1991-03-19

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

198323, 340529, 340563, G08B 1314

Patent

active

050014595

ABSTRACT:
The location on an escalator where the handrail reenters the balustrade is provided with an electrical field projector which will establish a limited extent electrical field around the handrail reentry housing. The field is established with a pair of antennae disposed adjacent to the handrail reentry. The antennae are preferably connected to the main AC power source for the escalator, and can be angularly adjusted to focus the field that they project. Shrouds are positioned adjacent to each antenna to confine the lateral extent of the field. An object entering the field will cause a field disturbance which creates a signal setting off an audible alarm. Subsequent stopping of the escalator can ensue if the disturbance is not removed in a predetermined amount of time.

REFERENCES:
patent: 3947832 (1976-03-01), Rosgen et al.
patent: 4629052 (1986-12-01), Kitamura
patent: 4664247 (1987-05-01), Wolf et al.
patent: 4800998 (1989-01-01), Myrick
patent: 4924995 (1990-05-01), Adrian et al.

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