发明名称 |
Assembly for, and method of, detecting and signalling when an object enters a work zone |
摘要 |
An assembly for detecting and signalling when an object enters a work zone including a plurality of transmitter-sensor pairs serially connected along a section of the work zone perimeter for detecting when an object passes therethrough. Once an object is detected, an optical warning signal is activated. The optical warning signal includes a primary strobe and a plurality of relay strobes positioned throughout the work zone. The primary strobe flashes at a predetermined flash rate which is detected by a photoelectric sensor in a nearby relay strobe. The nearby relay strobe begins flashing at the predetermined flash rate thereby activating another relay strobe in close proximity. This cascading strobe effect saturates the work zone.
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申请公布号 |
US5552767(A) |
申请公布日期 |
1996.09.03 |
申请号 |
US19940194931 |
申请日期 |
1994.02.14 |
申请人 |
TOMAN, JOHN R. |
发明人 |
TOMAN, JOHN R. |
分类号 |
G08B5/36;G08B5/38;G08G1/16;(IPC1-7):G08B21/00 |
主分类号 |
G08B5/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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