Indicator to show whether a switch has opened

Details Indicator to show whether a switch has opened Indicator to show whether a switch has opened

1977-05-18

1979-11-27

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

318490, 361 23, 340639, 340648, 340652, G08B 2100

Patent

active

041763505

ABSTRACT:
An indicator is provided for use in a machine, such as an escalator, having a multiplicity of normally closed switches which act to turn off the machine in the event of a machine malfunction, unsafe condition or an inappropriate switch placement. The switches are capable of reclosing but not restarting the machine. The indicator shows which of the switches caused the machine to stop thereby performing a troubleshooting function to allow a repairman to determine immediately which of the various machine systems caused the malfunction or unsafe condition.

REFERENCES:
patent: 1893305 (1933-01-01), Rentschler
patent: 2007313 (1935-07-01), Sherwood
patent: 2115428 (1938-04-01), Quisling
patent: 2488622 (1949-11-01), Giorgianni
patent: 2576574 (1951-11-01), Cochran
patent: 2736009 (1956-02-01), Barnickel
patent: 2930961 (1960-03-01), Lezan
patent: 3041427 (1962-06-01), Waller et al.
patent: 3462754 (1969-08-01), Kelley
patent: 3889248 (1975-06-01), Ritter

Affiliated with

Also associated with

Rating

Indicator to show whether a switch has opened does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Indicator to show whether a switch has opened, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Indicator to show whether a switch has opened will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-804710