Movable or removable closures – Safety means responsive to obstruction to closure – Sensing shoe on leading edge
Patent
1990-08-16
1991-07-02
Kannan, Philip C.
Movable or removable closures
Safety means responsive to obstruction to closure
Sensing shoe on leading edge
49 28, 49 31, 49506, E05F 1502
Patent
active
050275526
ABSTRACT:
A redundant sensing edge for a door to protect persons, equipment and the door from impact damage by actuating a device upon detecting an object in proximity to the door edge. The sensing edge includes an elongate outer sheath compressible upon application of external pressure. A force sensing switch is positioned within the elongate outer sheath for sensing the application of force to the sheath. Upon force being applied to the sheath, the force sensing switch actuates the device for controlling the door. The sensing edge also includes a proximity sensing switch for detecting the presence of an animate object in proximity to the door edge. The proximity sensing switch includes an electrical circuit positioned near the elongate sheath and a control circuit for detecting changes in the capacitance of the electrical circuit. An animate object in proximity to the elongate sheath changes the capacitance of the electrical circuit. The control circuit detects the change in capacitance and in response to the change in capacitance actuates the device. Thus, the device is actuated either upon the detected presence of an animate object in proximity to the sheath or upon the application of force to the sheath, thereby giving the sensing edge redundancy.
REFERENCES:
patent: 2843690 (1958-07-01), Miller
patent: 3243540 (1966-03-01), Miller
patent: 3303303 (1967-02-01), Miller
patent: 3315050 (1967-04-01), Miller
patent: 3321592 (1967-05-01), Miller
patent: 3462885 (1969-08-01), Miller
patent: 3754176 (1973-08-01), Miller
patent: 3812313 (1974-05-01), Wolf et al.
patent: 3855733 (1974-12-01), Miller
patent: 3867595 (1975-02-01), Ramsey et al.
patent: 3896590 (1975-07-01), Miller
patent: 4051336 (1977-09-01), Miller
patent: 4137116 (1979-01-01), Miller
patent: 4200777 (1980-04-01), Miller
patent: 4261440 (1981-04-01), Jacoby
patent: 4349710 (1982-09-01), Miller
patent: 4362911 (1982-12-01), Sears et al.
patent: 4396814 (1983-08-01), Miller
patent: 4401896 (1983-08-01), Fowler et al.
patent: 4475308 (1984-10-01), Heise et al.
patent: 4497989 (1985-02-01), Miller
patent: 4661664 (1987-04-01), Miller
patent: 4773155 (1988-09-01), Buchien
patent: 4785143 (1988-11-01), Miller
patent: 4894952 (1990-01-01), Trett et al.
patent: 4908483 (1990-03-01), Miller
patent: 4954673 (1990-09-01), Miller
Galperin Anatoly
Miller Bearge D.
Miller Norman K.
Kannan Philip C.
Miller Edge, Inc.
LandOfFree
Redundant sensing edge for a door for detecting an object in pro does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Redundant sensing edge for a door for detecting an object in pro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Redundant sensing edge for a door for detecting an object in pro will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1237724