Door warning system
First Claim
Patent Images
1. A door warning system, comprising:
- a sensor adapted to sense the presence of persons immediately adjacent a first side of a swinging door;
alarm means responsive to the sensor means adapted to advise a person on a second side of the door being opposite the first side of the presence of a person on the first side of the door; and
wherein the door associated with the system is provided with link mean attached to an electrical power generating means adapted to convert one of the opening and closing motion of the door into an appropriate form to drive the electrical power generating means, the electrical power generating means in turn being in communication with a storage battery which powers the sensor and alarm means.
1 Assignment
0 Petitions
Accused Products
Abstract
A door warning system comprising a sensor adapted to sense the presence of persons immediately adjacent a first side of a swinging door; an audio or visual alarm responsive to the sensor adapted to advise a person on a second side of the door being opposite the first side of the presence of a person on the first side of the door.
71 Citations
14 Claims
-
1. A door warning system, comprising:
-
a sensor adapted to sense the presence of persons immediately adjacent a first side of a swinging door;
alarm means responsive to the sensor means adapted to advise a person on a second side of the door being opposite the first side of the presence of a person on the first side of the door; and
wherein the door associated with the system is provided with link mean attached to an electrical power generating means adapted to convert one of the opening and closing motion of the door into an appropriate form to drive the electrical power generating means, the electrical power generating means in turn being in communication with a storage battery which powers the sensor and alarm means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A door warning system, comprising:
-
a sensor adapted to sense the presence of persons immediately adjacent a first side of a swinging door;
alarm means responsive to the sensor means adapted to advise a person on a second side of the door being opposite the first side of the presence of a person on the first side of the door; and
wherein the door associated with the system is provided with link means attached to an electrical power generating means adapted to convert the opening motion of the door into an appropriate form to drive the electrical power generating means, the electrical power generating means in turn being in communication with a storage battery which powers the sensor and alarm means; and
biasing means adapted to close the door with the electrical power generating means being used to damp the closing of the door under the influence of the biasing means. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification