Revolving door control

Details Revolving door control Revolving door control

1984-10-12

1986-04-15

Kannan, Philip C.

Movable or removable closures

Initial manual displacement energizes motor drive; e.g.,...

49 29, 49 42, E05F 1510, E05D 1502

Patent

active

045818495

ABSTRACT:
A motor drive and control system is set forth for use with revolving doors. To operate the door and revolve the revolving door panels a motor is coupled to the revolving door shaft. The motor is of the d-c type having a fixed, permanent magnet and a rotating armature. A relay is provided which is energized when a person enters the door and begins to push on a selected panel. Pushing on the panel partially rotates the shaft as well as the motor armature. Rotation of the armature generates the voltage to trigger a relay which, in turn, energizes the motor to rotate the shaft and revolve the panels approximately 180 degrees between the entrance and exit as determined by a timer to pass an individual through the door.

REFERENCES:
patent: 1278145 (1918-09-01), Haviland
patent: 2341545 (1944-02-01), Hagenbook
patent: 4154023 (1979-05-01), Carroll
patent: 4475308 (1984-10-01), Heise et al.

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