Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
235 words
Apparatus for variably controlling the application of a D.C. energization source to a motor, said apparatus comprising: (a) main switching means commutable between a conductive state and a nonconductive state to respectively connect and disconnect the energization source to said motor; (b) a solenoid having a first, normally open switch, said first switch being connected by a first circuit in series with the energization source and said main switching means, and a first coil energizable to close said first switch; (c) commutating means for commutating said main switch means between its conductive and nonconductive states, whereby the energization source is connected through said closed first switch to energize said motor; (d) a relay having a second, normally open switch, said second switch connected in series with said first switch across the energization source, and a second coil energizable to close said second switch; and (e) failure detector means responsive to the commutation of said main switching means for energizing said second coil, whereby said second switch is closed, said first coil energized and said first switch is closed to complete said first circuit and to energize said motor, and responsive to the lack of commutation of said main switching means for deenergizing said second coil, whereby second switch is opened, said first coil deenergized and said first switch opened to disconnect the energization source from said motor when said main switch means fails to commutate.
Claim 2
Dependent Claim
235 words
Apparatus for variably controlling the application of a D.C. energization source to a motor, said apparatus comprising: (a) main switching means commutable between a conductive state and a nonconductive state to respectively connect and disconnect the energization source to said motor; (b) a solenoid having a first, normally open switch, said first switch being connected by a first circuit in series with the energization source and said main switching means, and a first coil energizable to close said first switch; (c) commutating means for commutating said main switch means between its conductive and nonconductive states, whereby the energization source is connected through said closed first switch to energize said motor; (d) a relay having a second, normally open switch, said second switch connected in series with said first switch across the energization source, and a second coil energizable to close said second switch; and (e) failure detector means responsive to the commutation of said main switching means for energizing said second coil, whereby said second switch is closed, said first coil energized and said first switch is closed to complete said first circuit and to energize said motor, and responsive to the lack of commutation of said main switching means for deenergizing said second coil, whereby second switch is opened, said first coil deenergized and said first switch opened to disconnect the energization source from said motor when said main switch means fails to commutate.
Claim 3
Dependent Claim
41 words
The motor controlling apparatus as claimed in claim 1, wherein said failure detector means comprises a capactive element connected to said main switching means and upon failure of said main switching means to commutate, blocking the DC energization signal applied thereto.
Claim 4
Dependent Claim
37 words
The motor controlling apparatus as claimed in claim 2, wherein said failure detector means further comprises a transistor coupled to said capactive element and responsive to the blocking of said capacitive element, for deenergizing said second coil.
Claim 5
Dependent Claim
68 words
The motor controlling apparatus as claimed in claim 2, wherein there is included a second capacitive element and a resistor connected in parallel with each other, the parallel combination of the second capacitive element and resistor being connected in series with said second coil, whereby upon the initial energization of said failure detector means, an energizing signal is directed through second coil to charge said second capacitive element.