Prime mover, method of operating such and circuit

A prime mover adapted for energization generally to a preselected speed therefor across a power source, the prime mover comprising at least a pair of winding means for excitation to effect the energization of the prime mover generally to the preselected speed when it is energized across the power source, a PTCR associated with one of said winding means of said at least pair thereof and energized with the prime mover across the power source so as to inhibit the excitation of said one winding means generally as the prime mover attains its preselected speed, and means operable generally in response to a preselected condition associated with the excitation of the other of said winding means of said at least pair thereof and indicative of the occurrence of the preselected speed of the prime mover for effecting the deenergization of said PTCR generally as the prime mover attains its preselected speed.

In combination, a prime mover adapted to energization in both a starting mode and a subsequent running mode across a power source and a PTCR energized with the prime mover so as to predeterminately terminate the starting mode energization of the prime mover;

• the improvement comprising means energized with the prime mover and operable generally in response to a preselected condition indicative of the occurrence of the running mode energization of the prime mover for interrupting the energization of the PTCR generally as the prime mover attains its running mode energization.

A prime mover comprising at least a main winding means and at least an auxiliary winding means connected in circuit relation and adapted for excitation to effect the energization of the prime mover to a preselected speed therefor, a PTCR connected in circuit relation with said at least auxiliary winding means and energized in response to current applied thereto so as to inhibit the excitation of said at least auxiliary winding means generally as the preselected speed of the prime mover is attained, and means connected in circuit relation with said at least main winding means and said PTCR and operable generally in response to a preselected condition associated with the excitation of said at least main winding means and indicative of the occurrence of the preselected speed of the prime mover for interrupting the energization of said PTCR generally when the prime mover attains its preselected speed.

A method of interrupting the operation of a PTCR so as to inhibit current flow therethrough to one of at least a pair of winding means of a winding circuit in a prime mover generally upon the energization thereof to a preselected speed in response to the excitation of the winding circuit across a power source, the method comprising sensing a preselected condition in the winding circuit generally indicative of the occurrence of the preselected speed of the prime mover and opening a circuit between the power source and the one winding means so as to cause the deenergization of the PTCR and effect the interruption of the operation of the PTCR generally as the prime mover is energized to its preselected speed.

A method of interrupting the operation of a PTCR acting to inhibit current flow therethrough to one of a pair of winding means in a winding circuit of a prime mover generally upon the energization thereof to a preselected speed in response to the excitation of the winding circuit across a power source, the method comprising sensing a preselected condition upon the occurrence thereof in the winding circuit generally when the prime mover attains its preselected speed and placing the PTCR in open circuit relation with respect to the power source so that the prime mover is energized across the power source in response to the continued excitation of at least the other of the winding means of the pair thereof.

A method of operating a prime mover having at least a pair of winding means adapted for excitation across a power source during a starting mode energization of the prime mover and with at least one of the winding means of the at least winding means pair adapted for excitation across the power source during a running mode energization of the prime mover, the method comprising the steps of:

• (a) energizing a means for inhibiting current flow therethrough to the other of the winding means of the at least winding means pair so as to terminate the starting mode energization of the prime mover and effecting the continued excitation of the at least one winding means across the power source during the running mode energization of the prime mover;
• and
• (b) placing the inhibiting means in open circuit relation with respect to the power source during the running mode energization of the prime mover to effect the deenergization of the inhibiting means.

A circuit for effecting the energization of a prime mover to a preselected speed therefor across a power source, the circuit comprising a pair of parallel circuit branches adapted for connection across the power source, said prime mover including main winding means and auxiliary winding means respectively connected in said circuit branches for excitation to effect the energization of the prime mover to its preselected speed, means associated with one of said circuit branches and operable generally for inhibiting current flow therethrough to said auxiliary winding means generally as the prime mover attains its preselected speed, and means operable generally in response to a preselected condition occurring in the other of said circuit branches when the prime mover attains its preselected speed for opening said one circuit branch across the power source to interrupt the operation of said inhibiting means.

A prime mover adapted for energization generally to a preselected speed therefor across a power source, the prime mover comprising at least a pair of winding means for excitation to effect the energization of the prime mover generally to the preselected speed when it is energized across the power source, means in circuit relation with one of said winding means of said at least pair thereof and the power source for inhibiting the excitation of said one winding means generally as the prime mover attains its preselected speed, and a relay device including contact means associated with said inhibiting means and operable generally for movement between open and closed positions, and coil means associated with the other of said winding means of said at least pair thereof for effecting the movement of said contact means between its open and closed positions, said coil means being operable generally in response to the occurence of a preselected condition with respect to the excitation of said other winding means to effect the movement of said contact means to the open position thereof and place said inhibiting means in open circuit relation with respect to the power source generally as the prime mover attains its preselected speed.

A prime mover adapted for energization generally to a preselected speed therefor across a power source, the prime mover comprising at least a pair of winding means for excitation to effect the energization of the prime mover generally to the preselected speed when it is energized across the power source, means in circuit relation with one of said winding means of said at least pair thereof and the power source for inhibiting the excitation of said one winding means generally as the prime mover attains its preselected speed, means operable generally in response to the occurrence of a preselected condition with respect to the excitation of the other of said winding means of said at least pair thereof for placing said inhibiting means in open circuit relation with the power source generally as the prime mover attains its preselected speed, and a device for protecting at least one of said one and other winding means in the event of the occurrence of a current overload condition including switch means for effecting open circuit relation between the power source and the prime mover upon the occurrence of the current overload condition, said inhibiting means being disposed in said device in spaced relation with said switch means so as to transfer heat thereto when said inhibiting means is energized.

In combination with a prime mover adapted for energization in both a starting mode and a running mode across a power source;

• a PTCR energized with the prime mover so as to predeterminately terminate the starting mode energization of the prime mover, and a relay device energized with the prime mover and operable upon the occurrence of a drop in the current draw of the prime mover generally as it attains its running mode energization for interrupting the energization of the PTCR.

In a prime mover adapted for energization in both a starting mode and a subsequent running mode across a power source and having means energized with the prime mover for predeterminately terminating the starting mode energization of the prime mover;

• the improvement comprising means energized with the prime mover and operable upon the occurrence of a preselected condition associated with the running mode energization of the prime mover for interrupting the energization of the terminating means generally as the prime mover attains its running mode energization, and thermal responsive switch means operable generally for interrupting the energization of the prime mover across the power source in the event of the occurrence of a current overload condition, the terminating means being disposed adjacent said switch means so as to transfer heat thereto when said terminating means is energized.

A prime mover comprising at least a main winding means and an auxiliary winding means connected in circuit relation and adapted for excitation to effect the energization of the prime mover to a preselected speed therefor, means associated with said auxiliary winding means and energized in response to current applied thereto for inhibiting the excitation of said auxiliary winding means generally as the preselected speed of the prime mover is attained, and a relay device including coil means associated in circuit relation with said main winding means, and contact means associated in circuit relation with said inhibiting means, said coil means being operable generally in response to a preselected condition with respect to the excitation of said main winding means to effect actuation of said contact means to a position in open circuit relation with said inhibiting means so as to interrupt the energization thereof generally as the prime mover attains its preselected speed.

A prime mover adapted for energization generally to a preselected speed therefor across a power source, the prime mover comprising at least a pair of winding means for excitation to effect the energization of the prime mover generally to the preselected speed when it is energized across the power source, means associated with one of said winding means of said at least pair thereof and energized with the prime mover across the power source for inhibiting the excitation of said one winding means generally as the prime mover attains its preselected speed, and means operable generally in response to a preselected condition associated with the excitation of the other of said winding means of said at least pair thereof and generally indicative of the occurrence of the preselected speed of the prime mover for effecting the deenergization of said inhibiting means generally as the prime mover attains its preselected speed, said deenergization effecting means including contact means in circuit relation with said inhibiting means for movement between an open position and a closed position, said contact means being disposed in the open position thereof to effect the deenergization of said inhibiting means.

A prime mover adapted for energization generally to a preselected speed therefor across a power source, the prime mover comprising at least a pair of winding means for excitation to effect the energization of the prime mover generally to the preselected speed when it is energized across the power source, means associated with one of said winding means of said at least pair thereof and energized with the prime mover across the power source for inhibiting the excitation of said one winding means generally as the prime mover attains its preselected speed, and a relay device including contact means associated with said inhibiting means and operable generally for movement between open and closed positions, and coil means associated with said other winding means for effecting the movement of said contact means between the open and closed positions thereof, said coil means being operable generally in response to a preselected condition indicative of the occurrence of the preselected speed of the prime mover to effect the movement of said contact means to the open position thereof and thereby cause the deenergization of said inhibiting means.

A prime mover adapted for energization generally to a preselected speed therefor across a power source, the prime mover comprising at least a pair of winding means for excitation to effect the energization of the prime mover generally to the preselected speed when it is energized across the power source, means associated with one of said winding means of said at least pair thereof and energized with the prime mover across the power source for inhibiting the excitation of said one winding means generally as the prime mover attains its preselected speed, means operable generally in response to a preselected condition associated with the excitation of the other of said winding means of said at least pair thereof and indicative of the occurrence of the preselected speed of the prime mover for effecting the deenergization of said inhibiting means generally as the prime mover attains its preselected speed, and a device for protecting said at least winding means pair in the event of the occurrence of an overload condition including switch means for effecting an open circuit relation between the power source and the prime mover upon the occurrence of the current overload condition, said inhibiting means being disposed in said device in spaced relation with said switch means so as to transfer heat thereto when said inhibiting means is energized.

In combination with a prime mover adapted for energization in both a starting mode and a running mode across a power source, thermal responsive switch means operable generally for interrupting the energization of the prime mover across the power source in the event of the occurrence of a current overload condition, and means energized with the prime mover for predeterminately terminating the starting mode energization of the prime mover and disposed adjacent the switch means so as to transfer heat thereto when energized;

• the improvement comprising means energized with the prime mover and operable generally in response to a preselected condition indicative of the occurrence of the running mode energization of the prime mover for interrupting the energization of the terminating means generally as the prime mover attains its running mode energization.