| 摘要 |
<p>The elevator alert includes an elevator pit can (10) and a float switch (240) disposed therein. The float switch (240) produces an alarm-activating signal when the pit can (10) is nearly full and overflow of oil into the pit is imminent. An alarm control unit (200) takes alarm- activating signals from one or more float switch-equipped pit cans (10) to operate a relay (405a, 405b) to drive various kinds of alarms and/or elevator controls. A loudspeaker (210) on the pit can (10) emits an audible alarm when the float switch (240) is closed. Optionally, a remote alarm (300) is provided, the remote alarm (300) being activated when the remote alarm float switch (250) is closed. Users of the elevator, such as passenger or building occupants, would hear the audible alarm and call maintenance to thereby prevent an oil spill. The device can be retrofit to existing elevator pit cans.</p> |
