US3772580A — Synchronizing system to synchronize the speed of …

Claim 1

Independent Claim 319 words

Synchronization system to synchronize the speed of a DC motor (10) with the frequency of a command pulse train (22; FIG. 2: A) comprising means (18, 20) generating a motor speed pulse train (34; FIG. 2: D) having a repetition rate representative of motor speed; controlled switch means (16) connecting the motor to a source of power (12, 14); and a motor energization control circuit for said controlled switch means (16) to determine relative opening and closing periods of said controlled switch means comprising a bistable multivibrator (32); a control circuit for said multivibrator (32) to trigger said multivibrator to change state, said bistable multivibrator control circuit including a divider (30) connected to have said command pulse train applied thereto and dividing the frequency thereof by a value of n, where n is a whole number equal to or greater than two, and having a divided pulse output (33, FIG. 2: C) upon completion of division, said divider having a second input connected to said motor speed pulse train, the pulses thereof resetting the divider to its original state, to recommence dividing subsequent command pulses said divided pulse output of said divider (30) being applied to said bistable multivibrator (32) to trigger the multivibrator (32) to change state, the multivibrator being connected to and controlled by the motor speed pulse train to change to its original state from the state to which it had been triggered by said divided pulse output; and a connection circuit (38, 40) connecting the output of the multivibrator (32) and the controlled switch (16), said connecting circuit including an integrator (38) connected to said multivibrator (32) and providing an output which is a function of the time said multivibrator (32) is in said changed state, and means (40) responsive to a predetermined integration level controlling the closing time of said switch (16) to thus control the duty cycle of power applied to the motor.

Claim 2

Dependent Claim 319 words

Synchronization system to synchronize the speed of a DC motor (10) with the frequency of a command pulse train (22; FIG. 2: A) comprising means (18, 20) generating a motor speed pulse train (34; FIG. 2: D) having a repetition rate representative of motor speed; controlled switch means (16) connecting the motor to a source of power (12, 14); and a motor energization control circuit for said controlled switch means (16) to determine relative opening and closing periods of said controlled switch means comprising a bistable multivibrator (32); a control circuit for said multivibrator (32) to trigger said multivibrator to change state, said bistable multivibrator control circuit including a divider (30) connected to have said command pulse train applied thereto and dividing the frequency thereof by a value of n, where n is a whole number equal to or greater than two, and having a divided pulse output (33, FIG. 2: C) upon completion of division, said divider having a second input connected to said motor speed pulse train, the pulses thereof resetting the divider to its original state, to recommence dividing subsequent command pulses said divided pulse output of said divider (30) being applied to said bistable multivibrator (32) to trigger the multivibrator (32) to change state, the multivibrator being connected to and controlled by the motor speed pulse train to change to its original state from the state to which it had been triggered by said divided pulse output; and a connection circuit (38, 40) connecting the output of the multivibrator (32) and the controlled switch (16), said connecting circuit including an integrator (38) connected to said multivibrator (32) and providing an output which is a function of the time said multivibrator (32) is in said changed state, and means (40) responsive to a predetermined integration level controlling the closing time of said switch (16) to thus control the duty cycle of power applied to the motor.

Claim 3

Dependent Claim 10 words

System according to claim 1, wherein the number n 2.

Claim 4

Dependent Claim 10 words

System according to claim 1, wherein the number n 8.

Claim 5

Dependent Claim 11 words

System according to claim 1, wherein the number n is variable.

Claim 6

Dependent Claim 12 words

System according to claim 1, wherein the divider is a digital divider.

Claim 7

Dependent Claim 33 words

System according to claim 1, wherein the divider is a digital divider having two outputs at different counts, said two outputs being alternately connectable to said one input of said bistable multivibrator (32).

Claim 8

Dependent Claim 65 words

System according to claim 1, additionally comprising inhibit means (144, 152, 164) connected to said divider and further connected to have the motor speed pulse train applied thereto, the inhibit means having its output connected to said command pulse train and inhibiting application of pulses to the divider (30) unless the divider pulse output is followed by a pulse from the motor speed pulse train.

Claim 9

Dependent Claim 89 words

System according to claim 1, additionally comprising inhibit means (354) connected (353) to an output (350) of said divider (30); the said output of the divider carrying a signal related to the number of command pulses stored in the division stages of the said divider and said signal acting on the inhibit means (354) and thereby inhibitting the motor speed pulses to reset the said divider (30) unless a predetermined number of command pulses habe been applied to the divider after that divider had been in its original state.

Claim 10

Dependent Claim 99 words

System according to claim 1, additionally comprising coincidence means (144) having said motor speed pulse train and pulses representative of said command pulse train applied thereto, the output of said coincidence circuit being connected to said divider (30) to inhibit application of the command pulses to said divider if a subsequent motor speed pulse occurs without an intervening divided pulse being delivered from said divider, so that change of state of said multi-vibrator (30) will always be commanded and controlled by the sequence: divided pulse -motor speed pulse - divided pulse - . . . . and so on.

Claim 11

Dependent Claim 46 words

System according to claim 1, additionally comprising blocking means (268, 274, 280) connected to said divider (30); counter means (274) having said command pulses applied thereto; and means (278, 280) controlled by said blocking means and inhibiting motor speed pulse train to reset said divider (30).

Claim 12

Dependent Claim 88 words

System according to claim 1, additionally comprising means sensing whether the sequence of pulses applied to said bistable multi-vibrator (32) is alternately: divided pulse output pulses and motor speed pulses, said means comprising a divide-by-two circuit (501) having said motor speed pulses applied thereto; and a reset connection for said divide-by-two circuit (501) connected to the output of the divider (30); and means controlled by the output of said divide-by-two circuit to modify the input applied to said bistable multivibrator and triggering said multi-vibrator into said one state.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-11-12	1977-05-14	1977-11-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-11-12	1981-05-14	1981-11-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-11-12	1985-05-14	1985-11-13	$7700.00	Window Closed / Lapsed

Synchronizing system to synchronize the speed of a dc motor with the frequency of a command pulse train

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