USRE21103E - Communication system - Google Patents

Description

May 30, 1939.

w. s. LEMMON Re. 21,103

COMMUNICATION SYSTEM Original Filed Feb. 15, 1934 v ?Q re 1 i E v Q E )m M 6 IN VENT OR Wd/f?! 5. Lem/non.

m 9 ATTORNEYS Reissued May 30, 1939 UNITED STATES PATENT OFFICE COMMUNICATION SYSTEM poration oi New York No. 2,000,765, dated May I, 1935, Serial No. 711,313, February 15. 1934.

Application for reissue January 14, 1937, Serial No. 120,020

13 Claims.

In accordance ith the present invention, corl5 respondence between the cyclical rates, and phase correspondence as between the impulse controlling means and the impulse distributing means, is secured by causing an actuating impulse to be transmitted by the cyclical impulse 20 controlling means at a predetermined point in each cycle of the cyclical impulse controlling means, and by providing in the receiver an actuating means for the distributor, which causes said distributor to operate at the same cyclical rate as the impulse controlling means, by energy supplied at the irequency oi the received actuating impulses.

It is a feature of the invention that the actuating impulses and the signal impulses which are received with the sender and receiver in phase correspondence are separated and distinguished by the receiver so that the signal impulses are not permitted to affect the means for actuating the cyclicalimpulse distributing means.

It is a further feature of the invention that provision is made in the receiver 01' frequency multiplying means and of means for operating the distributing means responsive to the multiplied irequency oi the operating impulses to op- 0 erate the distributing means at thesame rate as the sending collector.

Other objects and advantages will hereinalter appear.

In the drawing forming part 01 this specification, 45 Fig. 1 is a diagrammatic view illustrating the sending and receiving apparatus: and

Fig. 2 is a fragmentary diagrammatic view iilustrating another term of apparatus embodying 50 features of the invention.

The sender comprises a commutator ring I which includes an operating-impulse contact 2 and a multiplicity of signal contacts 3 01' which only a few are illustrated. The operating-im- 55 pulse contact is connected through a conductor one another.

a suitable transmitting or broadcasting means indicated by the rectangle I. The transmitting means I is connected by conductor'l with the hub portion of a cyclical impulse controlling device 9. The battery I is eil'ective to produce an impulse through the transmitting means I each time that the controller arm 9 wipes across the contact 2. The controller arm 8 rotates at uniform speed and hence the operating impulses are sent out at uniform time intervals.

Between successive operating impulses the controller arm 9 wipes across all of the signal contacts 3 in predetermined order completing a circuit through the transmitter I as it touches each contact. The contacts 3 are adapted to be selectively charged by means not shown, and any such contact that is charged will cause an impulse to be sent out as the controller arm 9 wipes across it. Such an impulse will obviously be timed with reference to the operating impulse, in accordance with the position 01 the particular character contact which is charged. These character contacts are so disposed around the circumference of the controlling device that they are separated from the operating-impulse contact 2 by a time distance greater than the length of the operating-impulse.

The sender may be used in line telegraphy or carrier current systems, or for radio. A radio antenna Ill is indicated.

In the receiver, an antenna II is connected to an amplifier l2 and this amplifier is connected through a conductor it to a battery It. The battery it is in turn connected through a conductor I! with the hub portion of a rotary distributor arm 18. The distributor arm 16 carries two brushes which are electrically connected to One 0! these brushes is adapted to wipe across contacts 26 which are mounted on a stationary disc 21 and which correspond in their positions with the signal contacts 3 of the sender. The other brush forms part of a device 11 which closes a circuit between conductor l and either a ring segment 22 or contacts II, 24 and 25.

The ring segment 22 and the contacts II, II and 25 are the same as the correspondingly numbered parts disclosed in my pending application, Serial No. 684,362, filed August 19, 1933, for Synchronizing system. In said application disclosure is made of the idea of utilizing what are referred to herein as the actuating impulses, for adjusting the receiving distributor into phase correspondence with the sending distributor. In the present apparatus they may serve the same purpose, but they are additionally utilized (amplified) to actually drive the distributor arm It. The ring segment 22 and the contacts 23, 24 and 25, together with the circuits thereof, constitute in said application a means for adjusting the arm l6 a step forward with relation to the sending controlling device, each time that an actuating impulse comes through on the ring segment 22 or the contact 23, and for adjusting the arm IS a step backward with relation to the sending collector each time that an actuating impulse comes through on the contact 25, In normal in-phase operation, the actuating impulses come through ordinarily on the contact 24, but may occasionally come through on the contact 23 or contact 25. Such impulses never come through on the ring segment 22 after phase correspondence has once been secured. Signal impulses are not transmitted until the phase correspondence has been secured at which time the ring segment 22 is open circuited to render it inoperative.

In normal operation, the actuating impulses are transmitted through a conductor 59, an electromagnet 6B, and conductors 63 and 58 to a conductor Ill. The conductor 10 is connected to one terminal of an amplifier II. The other termine] of the amplifier II is connected through a conductor 12 to a terminal of the amplifier l2 to complete the output circuit of the amplifler i2.

The electromagnet normally holds up an armature 33 against the force of a spring. The ring segment 22 is provided with a contact 32 with which the armature 33 is adapted to engage when released by the electromagnet Gil. When the apparatus is first set into operation, and before any letter impulses have been transmitted, the actuating impulses may be transmitted through the ring segment 22, contact 32 and armature 33 to a conductor 34. Such current passes thence through an advancing relay A to conductor 10. As soon as in-phase operation is produced, however, the actuating impulses are transmitted through contact 24 and electromagnet Gil so that armature 33 is held away from contact 32. This condition is maintained so long as in-phase operation continues, the result being that no impulses transmitted while the arm I6 is in register with the ring segment 22 can get through to conductor 10. When an impulse is transmitted with the arm l6 engaging contact 23, the current travels through advancing relay A, causing in-phase operation to be immediately restored. This single cycle interruption of the normal circuit through 24 is not of sufllclent duration to permit armature 33 to move into engagement with contact 32. Similarly, when the actuating impulse is transmitted from arm l6 through contact 25, the current passes through a conductor 55, retarding relay R and conductor 53 to conductor 10, causing in-phase operation to be restored while maintaining the ring segment 22 inoperative.

The mechanism just described is effective both to prevent signal impulses from reaching the amplifier II, and to transmit power actuating impulses to said amplifier. Line current is applied to said amplifier from line terminals 13 and I4, and the output circuit 15 of the amplifier is connected through a transformer T with a circuit I6 which includes the field winding ll of a phonic motor 18. The rotor" of this motor is connected through suitable gearing (not shown) to drive the shaft 33 of the distributing arm IS. The characteristics of the motor 18 are such that it is adapted to be responsive to current of the frequency of the operating impulses, and to respond to current of such frequency by driving the shaft an at the same rotary speed as that at which the controller arm 3 of the sender is driven.

In the embodiment of Figure 2 the sending apparatus may be the same as that of Figure 1 and hence has not been illustrated. The receiving apparatus is also the same as that of Figure 1 with the exception of certain features which will be referred to below. The receiver comprises an antenna Ila and an amplifier Ho. The current is transmitted through a conductor I3a and a device Ila, 21a to a conductor Illa which is connected to one terminal of an amplifier and frequency multiplier I la. Any one of the several types of frequency multipliers well known in the art may be employed, such, for example, as the magnetic doubler type or the vacuum tube type. A conductor 12a. connectsthe opposite terminal of the amplifier and frequency multiplier I la with the amplifier i2a, completing the output circuit of the amplifier I211. The frequency multiplier and amplifier Ha, both of which may be of any suitable type well known in the art, are supplied with current from line terminals 13a and Ila, and the output circuit 15a is inductively connected through transformer Ta with a circuit 160 which includes the field winding Ha of a phonic motor 18a. The motor includes a rotor 19a which is connected to drive the shaft Ila upon which the distributor arm (not shown) is mounted. The rotor "a may be provided as shown in Figure 2 with a larger number of segments than'the rotor 19 of Figure 1. The increase in number may correspond to the frequency multiplications effected by the frequency multiplier. In such case the efi'ect of frequency multiplication is to produce a finer degree of responsiveness to the operating impulses and a smoother application of power. If preferred, however, the frequency multiplication may be utilized to alter in an advantageous manner the gearing employed, or possibly to obviate the need for gearing. This feature of stepping up the frequency is an important feature where more than one impulse per revolution of the sending controller is wanted, since it is desirable to avoid the complications which would be introduced by attempting to transmit from the sender a plurality of operating impulses in a single revolution of the sending controller.

I have described what I believe to be the best embodiments of my invention. I do not wish, however, to be confined to the embodiments shown, but what I desire to cover by Letters Patent is set forth in the appended claims.

I claim:

1. In a system for conveying intelligence by electrical impulses, in combination, a sender comprising an electrical impulse controller operating at uniform speed and a receiver comprising a signal impulse assorting distributor adapted to operate at substantially the same speed, said system including means in the sender for transmitting an electrical distributor-operating impulse at a predetermined point in each cycle and electrical signal impulses at other times, means in the receiver responsive to the reception of the operating impulses to rotate the distributor at the same speed as the sending controller, and in phase correspondence therewith, and said distributor including means eil'ective at phase correspondence for discriminating between and assorting the electrical impulses actuatin and the several electrical signalling impulses.

2. In a system for conveying intelligenceby electrical impulses. in combination, a sender comprising an electrical impulse controller operating at uniform speed and a receiver comprising a signal impulse assorting distributor adapted to operate at substantially the same speed, said system including means in the sender for transmitting an electrical distributor-operating impulse at a predetermined point in each cycle, means in the receiver responsive to reception of the operating impulses to rotate the distributor at the same speed as the sending controller, means in the receiver for initially transmitting the operating impulses through to the operating means regardless of the phase relation of the sender and the receiver, means for adjusting the receiver into phase correspondence with the sender, and means for thereafter excluding from the operating means electrical impulses transmitted in the interval between successive operating impulses.

3. In a system for conveying intelligence by electrical impulses, in combination, a sender comprising a controller operating at uniformv speed and a receiver comprising an electrical signal impulse assorting distributor adapted to operate at the same speed, said system including means in the sender for transmitting an electrical distributor-operating impulse at a predetermined instant in each cycle and signal impulses at other times, means in the receiver responsive to reception of the operating impulses to rotate the distributor at the same speed as the sending controller and in phase correspondence therewith, and means in the receiver effective at phase correspondence for excluding from the operating means impulses received between successive operating impulses.

4. In a system for conveying intelligence by electrical impulses, in combination, a sender and a receiver comprising an electrical signal impulse asserting rotary distributor adapted for operation at a predetermined uniform speed, said system including means in the sender for transmitting electrical distributor-operating impulses at uniform time intervals, and electrical signal impulses between successive operating impulses, means in the receiver responsive to said operating impulses to operate the distributor, and means in the receiver eiIective at phase correspondence of the sender and receiver for preventing electrical B18- nal impulses from affecting the distributor operating means.

5. In a system for conveying intelligence by electrical impulses, in combination, a sender and a receiver, said receiver including a rotary electrical signal impulse assorting distributor and means for rotating the same, and said sender including means for transmitting electrical distributor-operating impulses at uniform time intervals, and means in the receiver for utilizing the electrical operating impulses both to actuate the distributing means of the receiver and to maintain phase correspondence of the receiver with the sender.

6. In a system for conveying intelligence by electrical impulses, in combination, asender comprising means for transmitting electrical operating impulses at uniform time intervals and electrical signal impulses at other times, and a recelver comprising a rotary signal impulse distributor, means for operating the distributor, a source of electrical energy, and means controlled by the operating impulses for causing energy from said source to be supplied periodically to the distributor-operating means, and means, effective at phase correspondence of the sender and receiver, for discriminating between and asserting the several electrical signal impulses and the electrical operating impulses.

7. In asystem for conveying intelligence by electrical impulses, in combination, a sender comprising a collector operating at uniform speed and a receiver comprising a signal impulse distributor adapted to operate at substantially the same speed, means in the sender for transmitting a distributor-operatlng impulse at a single predetermined point in each cycle, and for sending signal impulses between successive operating impulses, means in the receiver for receiving the operating impulses and multiplying the frequency of the same, means responsive to such multiplied frequency to rotate the distributor at the same speed asthe sending collector, and means effective at phase correspondence of the sender and distributor for discriminating between the signalling and actuating impulses.

B. In a system for conveying intelligence by eletrical impulses, in combination, a sender comprising a cyclical electrical impulse controlling means, operating at a uniform cyclical electrical rate and a receiver comprising a cyclical signal impulse distributing means adapted to operate at substantially the same cyclical rate, said system including means in the sender for transmitting an electrical distributor actuating impulse at a. predetermined point in each cycle and electrical signal impulses at other times, and means in the receiver responsive to the. reception of the actuating impulses to actuate the distributing means at the same cyclical rate as the sending impulse controlling means and in phase correspondence therewith, said distributing means being eflective at phase correspondence for assorting the actuating impulses and the several signaling impulses. according to their timing.

9. In a system for conveying intelligence by electrical impulses, in combination. a sender comprising a cyclical impulse controlling means operating at uniform cyclical rate and a receiver comprising a cyclical electrical signal impulse distributing means, adapted to operate at the same cyclical rate, said system including means in the sender for transmitting an electrical distributor-actuating impulse at a predetermined instant in each cycle and electrical signal impulses at other times, means in the receiver responsive to reception of the electrical actuating impulses to actuate the distributor at the same cyclical rate as the said sending impulse controlling means, and in phase correspondence therewith, and means in the receiver eflective at phase correspondence for excluding from the distributor actuating means, electrical impulses received between successive electrical actuating impulses. and for assorti-ng the electrical signaling impulses according to their timing.

10. In a system for conveying intelligence by electrical impulses, in combination, a sender and a receiver. said receiver including a cyclical electrical signal impulse distributing means for transmitting electrical signal impulses to diverse des tinations according to their individual timing relative to the electrical actuating impulses, and means for actuating the distributing means, and said sender including means for transmittin distributor actuating electrical impulses at uniform time intervals, and means in the receiver for utilizing the electrical actuating impulses both to actuate the distributing means of the receiver and to maintain phase correspondence 0! the receiver with the sender.

11. In a system for conveying intelligence by electrical impulses, in combination, a sender comprising means for transmitting electrical actuating impulses at uniform time intervals and timed, electrical signal impulses at other times. and a receiver comprising a cyclical electrical signal impulse distributing means, means for actuating said distributor means, a source of electrical energy, means controlled by the actuating impulses for causing energy from saidsource to be supplied periodically to the distributor actuating means, and means eiiective at phase correspondence of the sender and distributor for assorting the timed electrical signal impulses and the electrical actuating impulses according to their timing.

i2.-a system for transmitting intelligence by electrical impulses having, in combination, a sender, comprising a cyclical impulse controlling means normally actuated at a substantially uni-- form cyclical rate for making a single transmitting channel exclusively available for the transmission of. an actuating impulse in the first period of each cycle and for making said channel exclusively available during the ensuing periods 01 a cycle to individual signal impulse sources of the sender one after another, in predetermined sequence, whereby each impulse is transmitted individually and not superposed in whole or in part upon any other impulse, and a receiver comprising a cyclical impulse distributor and actuating means therefor, said actuating means maintaining the distributor in phase with the controlling means of the sender in response to the actuating impulses, and said distributor acting to place the transmitting channel exclusively in communication with the distributor actuating means during the first period of each cycle and to place each of a multiplicity or signal impulse operated circuits individually in exclusive communication with the transmitting channel in predetermined sequence during the ensuing periods of the distributor cycle, the actuating impulses serving to actuate and time the distributor cycle for cycle and period for period with the sender controlling means.

13. A system for transmitting intelligence comprising the combination with a single transmitting channel. of a sender, and a receiver. said sender comprising control means to:- transmitting actuating impulses through the single transmitting channel to the sender at regular, widely separated periods each marking the beginning or a sender cycle, and for making the single transmitting channel available in predetermined sequence to each of a multiplicity of signal impulse originating sources during distinct ensuing periods oi each cycle so that each signal source is allotted a definite period in each cycle, with the result that each impulse is transmitted individually in a definite period and may be identifled with its particular source at the receiver by itstirning, and the receiver including cyclical distributing means actuated by the actuating impulses received i'rom the sender in the first period 0! each sender cycle to set up a distributing cycle corresponding in duration and also period for period with the controlling means of the sender, to allot to each of a multiplicity oi. signal responsive instrumentalities a predetermined period of each cycle, whereby each impulse responsive instrumentality oi the receiver, including both the actuating'means for the distributing means and the signal responsive instrumentalities. is made accessible to impulses only during the sending period or a particular impulse source of the sender, and is maintained inaccessible at all other times.

WALTER S. LEMIMON.

CERTIFICATE OF CORRECTION. Reissue No. 21,103. may 50, 1939.

HALTER S. LENNON.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, first column, line 2, claiml, for the words "impulses actuating" read actuating impulses; same page, second column, line 26, claima, for "eletrioal" read electrical; line m, same claim, strike out "electrical" and insert the same after "cyclical" in line 29, same c1aim8;and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Siped and sealed. this 15th day of August, A. D. 1939.

Leslie Frazer (Seal) {toting Commissioner of Patents.

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