Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-07-16
1999-06-29
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specific condition
3405681, G08B 2100
Patent
active
059174196
ABSTRACT:
A jumper rack system for keeping track of jumpers for a railroad includes a current conducting rack, a plurality of electrical current conducting members attached to and spaced along a support member which is fastened to a housing of the current conducting rack and having protruding portions for supporting jumpers used by a signalman. The current conducting rack is connected to an alarm unit having an alarm sounding member and light indicators, the alarm unit being connected to a power supply such as the ignition of a motor vehicle which is connected to a battery. Each current conducting member defines a jumper support. A complete circuit is formed through the current conducting rack when each jumper support is connected to an end of a respective jumper. When any jumper support is not connected to a jumper, the alarm unit will be actuated which will inform the user that a jumper is missing from the current conducting rack and that the user should check to see where the missing jumper is to avoid creating a possible dangerous situation.
REFERENCES:
patent: 4069919 (1978-01-01), Fernbaugh
patent: 4845593 (1989-07-01), Brown et al.
Lingbeck David A.
Mullen Thomas
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