Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1976-05-24
1978-11-07
Caldwell, Sr., John W.
Communications: electrical
Condition responsive indicating system
With particular system function
324160, 364550, 340 53, 340 62, 340670, B60Q 154
Patent
active
041248406
ABSTRACT:
An apparatus is provided which produces an alarm signal when the magnitude of a varying physical quantity such as the running speed of an automobile, for example, exceeds one of a plurality of preset threshold values. The apparatus includes detection means having a plurality of detection channels in which mutually different threshold values are defined and capable of producing an electrical output in response to the magnitude of the varying physical quantity exceeding a threshold value in each of the detection channels; selection means for selecting one of the threshold values and for providing an output signal indicative of the selected threshold value; and comparison and control means for comparing the output from the detection means and the output from the selection means to produce an electrical output when the magnitude of the physical quantity exceeds the threshold value selected by the selection means. The output of the comparison and control means represents an alarm signal which may be utilized by a variety of visual or acoustic devices or recorders.
REFERENCES:
patent: 3024443 (1962-03-01), Barker et al.
patent: 3504337 (1970-03-01), Ekman
patent: 3691525 (1972-09-01), McClellan
patent: 3744043 (1973-07-01), Walden et al.
patent: 3769844 (1973-11-01), Skoures
patent: 3793622 (1974-02-01), Hida et al.
patent: 3794972 (1974-02-01), Van Ostrom
patent: 3919688 (1975-11-01), Schick
Caldwell Sr. John W.
Crosland Donnie L.
Shingo Kizai Kabushiki Kaisha
LandOfFree
Alarm system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Alarm system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alarm system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2235235