US744946A - Automatic telephone-exchange. - Google Patents

Description

PATENTED NOV. 24, 1903. W. B. VANSIZE. 1 AUTOMATIC TELEPHONE EXCHANGE.

APPLICATION FILED APR. 22, 1903.

a Ks INVE TOR 4 SHEETS-SHEET 1.

N0 MODEL.

PATENTED NOV. 24, 1903.

W. B. VANSIZE. AUTOMATIC TELEPHONE EXCHANGE.

APPLICATION FILED APR. 22, 1903..

4 SHEETS-SHEET 2.

N0 MODEL.

INVENTOR No. 744,946. I PATENTED NOV. 24, 1903. W. B. VANSIZE.

AUTOMATIC TELEPHONE EXCHANGE. I

APPLICATION FILED APR. 22. 1903.

N0 MODEL.

4 SHEETS-SHEET 3.

WITNESSES: INVENTOR 6 W. W

PATENTED NOV. 24, 1903.

W. B. VANSIZB. AUTOMATIC TELEPHUNE EXCHANGE.

APPLICATION FILED APR. 22' 1903' 4 SHEETS-SHEET 4.

N0 MODEL.

INVENTOR WITNESSES:

Patented November 24, 1903.

T OFFICE.

WILLIAM BALDWIN VANSIZE, on NEW YORK, N. Y.

AUTOMATIC TELEPHON E-IEXCHAING E.

srncmrcnrron forming part of Letters Patent No.

744,946, dated November 24, 19021.

Application filed April 22, 1903. Serial No- 153,829. No model.)

To all whom it may concern.-

Be it known that LWILLIAM BALDWIN VAN- SIZE, a citizen of the United States, residing in the borough of Brooklymin the city of New York, in the county of Kingsand State of New York,- have made certain new and useful Improvements in Automatic Telephone-Exchanges, of which the following'is a specification.

This invention relates to apparatus for antomatically connecting two subscribers telephone-circuits into a single circuit at a central point or station,subsequently disconnecting said circuits and restoring normal conditions- The object of this invention is to minimize the amount of machinery and apparatus employed, to simplify its construction, to reduce its expense and its liability to disarrangement, and to obviate the necessity for the use p of anything but the most common and ordinary intelligence on the part of the calling subscriber.

The specific form of apparatus which I have employed to illustrate my invention and which is the best form now known to me consists of an automatic transmitter at the substation controlled by a section of perforated tape. Each substation has such a transmitter and a section of "tape for each station to be called for. Each, section of tape bears an arbitrary designation. of the calling-station and the station called for. At the mainstation each substation-circuit includes a flexible cord and plug-terminal. There is also a take-up device, and each plug-terminal rests at the end of a pivoted arm. The entire series of arms are arranged in the circumference of a circle; They hang vertically and when moved to a horizontal position present the plug-terminals at one and the same common point. 7 There is a portable shell or connecting device, withfour electrically-united springs arranged in two pairs to receive and hold the plug-terminals. In the operation-of'the switch theterminal of the called-for station is projected into engagement with the connecting shell. A constantly-operating alternating-current generator, to which the shell is normally connected, rings the called-for station. Immediately following this the terminal of the calling-stadevice on the line A B, Fig. 1.

tion is projected into engagement with the connecting-shell, the station is signaled, and the shell immediately drops to a point'below 'crossingthemat right angle's. The notched I barsare so constructed that by securing the proper arrangement a channel due to a series of registering notches is formed under any predetermined cross-bar. The notched bars are moved by a traveling electromagnet, which moves back and forth across the ends of the bars, presenting the contact-point of its armature-bar to each notched bar in succession. The travel of this magnet is synchronous with the movement of the tape-section through the transmitter, and the arrangement of the notched bars at the end of a transmitted call corresponds with the arrangement of perforations in the tape-section. At the end of each excursion of this traveling magnet the connecting-shell is properly shifted, and the notched bars are returned to their normal position by means of an electromagnet.

The accompanying drawings illustrate my invention.

Figure 1 is a complete viewof the invention. Fig.2 shows one ofthe transmitting tape-sections employed at the substation. Fig. 3 shows the switching device employed at the main station. Fig. 4 is asection of same on the line G H, Fig. 3. Fig. 5 shows one of the connectingshells. Fig. 6 is a vertical cross-section of a connecting-shell. Fig. 7 is a top plan view of the switching device shown in Fig. 3. Fig. Sis a detail view of the pivoted support for a circuit-terminal. Fig. 9 shows the circuit terminal or plug and its support. Fig. 10 is a view of theselecting view of the selecting device on the line E F, Fig. 10. Fig. 12 is a cross-sectionof' the se- Fig. 11 is*a lecting device on the l'ine'C D, Fig. 1; and Fig. 13 is a view of the supporting-bar of th selecting device when shifted.

. to 9, inclusive.

The switching device-The switching device at the main station is shown in Figs. 3 There are a series of levers 40, pivoted at 41 in a circle, as shownin Fig. 7. Each lever has a short arm 42 and is connected by a link 43 with the armature-bar 44 of a magnet45. The series of magnets 45 are supported on a circular base-board 46. Each subscribers circuit comes direct to a screwpost (1 and to a flexible cord 0, terminatingin plug 1). the base of this plug. The free end of the arm 40 is ring-shaped, as shown at 48, Fig. 8, and a ring 49 is pivoted within the ring 48 on the points 50 and 51. The circuit passes through this contact 47 to arm 40 and to a common ground 110. The usual arrange-.

ment of gravity take-up 52, consisting of a flat lead weight and pulley running on the cord c, is provided for each cord. The rods 40 normally hang under the influence of the weights 52 in a vertical position. When the short end 42 of the rod 40 is depressed by the attraction of the armature-bar 44, on closing circuit through magnet 45 the terminal or plug 10 is carried upward to a common central point e, as shown by the'dotted lines in Fig. 3.

There are a series of connecting-shells a, Figs. 5 and 6. Each such connector consists of a short cylindrical section 55 of metal, closely fitting a second simil r section 56 of metal. There is a tube-sectio 158 forming part of the section 56. This occupies a central position with respect to cylinder 55. The entrance to tube-section 58 is slotted at 59. The section 55 closely fits the section 56. The section 56 is provided with an upper flange 57 and a lower flange 60. Each flange has a slot, the slot in one being diametrically opposite that in the other, as shown at 61 and 62. The exposed exterior of the connecting-shell a is preferably covered with acoating of heat-con- I ducting insulating material, such as vitreous enamel. Within the cylinder 55 are two pairs of springs 8. -These springs are all electrically united, have a flaring opening, and conform to the outline of the terminal or plug 19. \Vhen'plugp enters a spring-contact s, it is caught and held. The springs s are constructed with a tendency to diverge or separate, but are held in operative position by plugs or sections of some easily-fusible material or some easily-fusible alloy w. The material w may be either beeswax, beeswax and resin, or what is called a triple? alloy-such as bismuth,

five parts; tin, 'two parts; lead, three parts;

mercury, one part. This amalgamated alloy melts at from 165 to 170 Fahrenheit. The object of this fusible section is to provide for releasing the plugs by the influence of heat, as will be described. The connectors a or connecting-shells are made in two parts to fa-. cilitate the application of the fusible sections to after they have been displaced by use. The

There is a conducting-contact 47 on connectors 21, are arranged upon a vertical rod f, provided with a rib 64, closely fittingthe slot 59 in the connector a. A fixed projection or finger supports the column of connecting-shells a. The rodf is in such a position that one of the pair of springs s of the connectors a'normally rests at the common central point e, to which the terminals 19 are carried. .When one'terminalhas been thrown into engagement With the connector ate, the connector is given asemirotatiomthereby presenting the second pair of springs s at the central point e. When the second-terminal has been connected, the connectors are given a second semirotation,which brings them into the position they first occupied. The finger 65 normally rides under the lower flange 60,. and the slot in this flange 61 is at the-opposite end of a diameter. When the shell receives its first semirotation,,the slot 61 is carried into registering position with the finger 65, and the finger allows the column of shells to drop, catching upon the second flange 57. Upon the second semirotation of the shells the slot 62 in the flange 57 allows the finger 65 to pass through, and the shell a, supporting the combined weight of the two terminals p,with their pulley-weights, drops down, and its weight is such that its gravity exceeds the combined weight of the take-up devices 52. The connecting-shell rests after it drops upon the metal table 66, which is heated by a gasburner 67 and has a coating of vitreous enamel 68 onits upper surface. This is to prevent crossing circuits when more than one connector rests upon the table. The heat of this table'is established at such a degree that the fusible section U; will melt and release the plugp from thespring sin the period of time established for the d uration of a conversationlet us say five minutes. The gravity take-up devices 52 then return the plugs 19 to their normal position, thus separating the talking circuit and establishing the individual circuits.'

The means for imparting a semirotation to the vertical rod f consists of a weight 70,with a cord 71 wound upon a barrel 72, fixed to the shaft f. At a point below the barrel there is fixed on the shaft f an escapement 73, controlled by an armature-bar 74 and operated by an electromagnet 75 in circuit with the battery 76, and a circuit-closer controlled by the selecting device, to be described. The disk 73 has two teeth or projections,as shown, at diametrically opposite points. An electric impulse in the coil of magnet 75 withdraws the armature-bar 74, allowing notched disk 73 to make a half-rotation. An alternatingcurrent generator g is connected to ground and to the rod f. This generator operates constantly. The connecting devices a while in position on the rod f are in connection with the generator When the called-for station-terminal p is projected into engagement with the spring s at the point e, the called-for-station bell is rung, and when the 15 upperedge of each baris slotted.

: them fingers.

Maud. 84-

5 ranging the slots in bars n a -vided undersome single finger 0, whereby it is y 55 magnet is responsive to currents of 65 this the carriage 90 travels.

calling-station terminal immediately following this is placed in contact with the connector the bells of both stations are rung till the connector is released from its normal po- 5 sition. Each of the bars 40 is operated by an armature-bar 44 and an electromagnet 45. Each magnet 45 is in a separate local circuit, and any one of these circuits is selected to be operated by a suitable selecting device.

The selecting device-"The selecting device is shown in Figs. 1, 10, 11, 12, and13 at 71.. It includes a suitable framework 2' and two groups orseries of metal bars or blades. One series, a, is arranged to slide lengthwise. The I call them slotted bars a. Above the slotted bars n, at right angles and in close proximity, are a series of bars or blades 0. These are thin metal blades pivoted on a rod at 80. I call Each constitutes the movable member of a circuitclosing device in circuit with wire 243, a battery 244, a magnet 45, and a fixed contact 81, Fig. 12. There is a bar j which normally supports the entire series of fingers 0, leaving the slotted bars 11 free to move. The bar j is connected to a fixed bar 82 by means of two pivoted links 83 The link 83 has a retracting-spring 85. Link 84 has a retracting-spring 86. The

0 springs pull in opposite directions and hold the links in a vertical position. When barj is moved in either direction longitudinally, it is lowered or dropped. This allows fingers 0 to rest upon slotted bars it, By properly archannel is proallowed to drop below the line of the other fingers. 1 It then makes contact with said spring 81 and closes the circuit. I have shown seven bars n-a number sufficient to provide for one hundred and twenty-eight different circuits. Each notched bar n added to the series will double and add one to the numberof possible combinations. Thus eightbars n will provide for two hundred and fifty-seven circuits. To

cause any finger 0 to drop while all others are held, one or more of the bars nare moved longitudinally. To do this, I provide an electromagnet- 70 on a carriage 90, traveling on a screw 91, rotated by aconstantly-operating electric motor a: in either direction. Motor-armature 92 is connected to screw 91 by a frictionclutch 93. There is a magnet m responsive to currents of one polarity only. There is a the opposite polarity only. Both magnets are fixed upon the traveling nut orcarriage 90. Armature-bar 95 of magnetm when carriage 90 is in its position of rest enters a slot in the disk 94, fixed on the screw 91, holding the traveling carriage, while the motor m continues to rotate. The friction-clutch 93 permits this action. There is a fixed bar 96 in the same vertical plane with screw 91. Upon Magnets m and 7.", are in the common ground-wire 110, which is connected to the pivoted supports 41 of the 'ately rotatesthe screw 91 and series of arms 40, as shown in Fig. 1. There is a screw 111 arranged parallel with the notched bars n. A nut q travels upon this screw and upon the fixed parallel rod 114. The screws 91 and 111 are geared together by bevel, gear-wheels 112 113; When a call-signal is transmitted from the substation, the first impulse is always, let us say, a negative impulse. This causes magnet m to withdraw armature-bar 95 from the slot in disk 94. The constantly-operating motor as immedicar'riage 90 starts on its travel. As the magnet in presents its armature-bar 115 to the end of each of the notched barsn in succession, a. current impulse when received causes armature-bar 115 to move a notched bar '12. a distance approximately one-half the distance between two adjacent fingers 0. -At the end of thetravel of magnet is across the series of bars 'n notches in each bar have been so alined that a channel is formed under one of the fingers 0. Traveling nut g has moved at the same rate as magnet is, and when magnet is has passed the bars n nut g has engaged the fast and loose contact device 120. There are two pairs of these fast and loose devices fixed to the sliding bar j. The members of each pair operate in respectively opposite directions. When the devices 120 and 121 are operated by the nut q, said nut passes device 121 freely in moving from right to left, Fig. 1, but engages device 120 and moves bar j. In moving from left to right nutq passes device 120 freely and engages device 121, thus moving barjin the reverse direction. Each so-called fast and loose device consists of a right-angled lever havingalong arm and a shortarm. Each device is pivoted at the angle, as 122. A spring 123 tends to hold each such device in its normal position. The nut q in moving from the position shown in Fig. l first encounters the projection 121, deflects it, and passes to the projecting arm 120. Its engagement with causes sliding bar j to move longitudinally until it takes the position represented in Fig. 13, where the nut q is shown at the point of passing and releasing 120. When released, spring 85, connected to link 83, returns the bar '3' to its normal position. YVhile bar j was below its normal plane, the fingers 0 dropped onto the edges of the bars n, and one of them dropped into an alined channel.

140 and 141 are the movable and fixed parts of a circuit-closing device in circuit in con ductor 142, with magnet 143, battery 76, and magnet 75. Circuit-closer 140 is operated by the fast and loose devices and 131. When nut q moves the bar jfrom right to left, the device 130 rubs across the point and is deflected; but on its return movement it is not deflected and operates to depress circuit-closer 140, closing the circuit 142. The armature of magnet 143, carrying the long bar 245, engages the ends of the bars 'n and returns these bars to their normal position. Simultaneously. the magnet 75 attracts its armature-bar 74. This releases the vertical rod f,which escapes one-half revolution,

. as above described. When the traveling carriage 90- reaches the limit of its movement, it engages the projection 150 of the motor-reversing device 1). This device is composed of a sliding bar frictionally held. It has two terminal projections 150 and 151 and a con tral projection 107, which is connected" to a battery 108 and to ground by conductor 109;

105 is a spring-contact connected by conductor 103 with motor-coil 101 and thence to earth. Spring-contact 106 is connected by conductor L to motor-coil 100 and thence to earth. When the circuit-reversing device 4) is shifted, battery 108 is connected in circuit with motor- coil 100 or 101, according to which spring 105 or 106 is in contact with the terminal107. The armature 92 of motor a; is permanently connected in circuit with battery 102. Cells 100 and 101 are so wound that battery 108 polarizes them oppositely. When traveling carriage 90.has engaged projection 150, circuit is closed through field-coil 101 of motor m. The motor rotates in a direction to connecting device.

bar on its return movement restores the normal position of the bars n and shifts the The carriage 90 now starts on its return, again arranging the bars at to represent the calling-station. The nut q, moving with it, passes the device 120,v

but engages the device 121, while the device 131 now operates the circuit-closer 140', as in the instance first described. When the carriage 90 strikes the projection 151, the

' motor is reversed, and the armatu re-bar 95 of magnet m drops into the slot in the disk 94,

- stopping further movement.

- The automatic transmitter.-To obviate the demand for skill and intelligence at the substation, an automatic transmitter t is provided. This is composed of a rotating drum 20, contact-fingers 21 and 22, and grounded batteries of opposite polarity 23 and 24, respectively connected to the contact-fingers 21 and 22. The drum has a central row of feedteeth 25 and is propelled by a coil-spring 26, wound by a crank-27, like a district telegraph signal-box. An escapem'ent 28 is employed to render the operation uniform and gradual. There is a slideway 29, through which the section of tape b is introduced to pass between the contact-fingers and the drum. The transmitting tape-section b is shown in detail in Fig. 2. It is provided with seven feed-holes t0 the inch arranged in a central line 30.

may also be supplied.

The current-transmitting perforations are arranged along the edges. The ,single perforation 35 in the division31 is designed to transmit an impulse of, say, negative polarity to release and start the controlling-magnet of the selecting device. The division 31 is 'designed to afiord an opportunity for the transthe two' short divisions 33 are passing, the

traveling magnet reaches the end of its ex cursion and starts back. The perforations in the division 34, arrangcd in reverse order as compared with those in division 32, determine the second arrangement of the longitudinal bars. It is to be understood that the relative position of the perforate and imperforate areas in a unit length of the tape, as in tapedivision 32, arbitrarily represents the arrangement of notched bars in the selecting device which operate the terminals of the called-for station and that the arrangement of the spaces in the tape-division 34 similarly represents the arrangement of the notched bars corresponding to the calling-station. These tape divisions and sections are all of uniform size and extent. The signal of the calling-station occupies the space 34 on all tape-sections, and there is one tape-division 32 perforated for each of the other exchange circuits or stations. It is designed that these tape-sections shall be provided and distributed by the proprietors or managers of the branch, and an alternating-current generator I have'shown ahandswitch u with means for connecting the substation-circuit 200 with the telephone set" through the conductor 201 or with the automatic transmitter in the conductor 202.-

Either ground-return or metallic circuits may be employed. I have shown ground-return circuits for illustration. If it is desired to use metallic circuits, the circuit-terminals must be provided with double contacts and the two pairs of spring-contacts in the shellconnectors must be properly divided to produce the corresponding electrical connections.

The operation of the -apparatus is as follows: A subscriber lifts his hand-telephone and listens. If the lineis' quiet and free from what he understands to be current impulses from another call-transmitter, he replaces the telephone, turns the handle 27 of transmitter I, and simultaneously inserts the tapesection b. The first impulse is from the battery 24, circuit passing through contact-finger 22, perforation 35, wheel 25, line 202, switch '16, line 200, connecting-post d, cord 0, plugp, lever 40, pivotal circular support 41 to common ground 110, and is effective in magnet m, which withdraws its armaturebar from the slot in disk 94. This frees the screw 91, and carriage 90 begins to move.

When armature-bar 115 reaches a point in. line with the first of the slotted bars a, the

first feed-hole in section 32 of the tape-sec, tion I) is in line with the contact-poiut 21..

When armature-bar 115 is in line with the second slotted bar of theseries n, the second feed-hole and the first perforation appearing in division 32 of tape-section b is in line with contact-finger 21. A positive impulse from battery 23 passes over line 202, thence via elements it, 200, d, 0,19, 40, 41 to 110, as just described, and is elfective in magnet 70. The second slotted bar is thus longitudinally displaced a distance approximately one-half the space between the fingerso. At the transmitter t tape-section 11 moves synchronously with the advance of the armaturebar 115, and at the end of the travel of carriage 90 bars n have been displaced in conformity with the perforations in division 32 of tapesection b. Carriage 90 continues its movement. The nut q, propelled by screw 111, operating through the device 120, shifts barj. A finger of the series 0 drops, closing circuit through spring 81, conductor 243, battery 244, and magnet 45. An arm 40 is thrown up, projecting the terminalp at the point 6 into double spring-contact s in the shell-connector a. Barj is returned byits spring. Circuit is closed at 140 and 141 via conductor 142, magnet 143, battery 76, and magnet 75. The vertical rod f rotates one-half turn. This presents the second pair of springs s at the point e and allows the finger to pass through the slot 61 in the flange 60. Magnet 143 simultaneously attracts its armature, and bar 245 returns the series of bars n to their normal position. At the end of its travel carriage 90 engages the projection 150, throwing the point 107 into engagement with the point 105. The motor-coil 101 is now ina circuit 103 105 107 108 109 to the ground return. The nut q and the carriage 90 immediately begin their return movement. The tape-section b has now reached the point indicated by the dotted line in the division 33. The operation of arranging the slotted bars 72 in conformity with the perforationsin division 34 of the tape-section b is repeated. Then traveling nut q engages the device 121, shifting barj in the opposite direction, which results in the same drop. Spring 86 then returns the barj, and the device 131 operates the circuit-closer 140, as above described. The carriage 9O continues its movement and engages the projection 151. Circuit is broken -through coil 101 of the motor and made through coil 100. The motor starts to reverse; but screw 91 is caught and held by the armature-bar 95, which drops into the slotin the disk 94, and the apparatus assumes .its normal position of rest ready for another call. Immediately following the described connection of the circuit-terminals and the release of the connector a from the vertical shaft] the connector (1' drops onto the table 66, which is heated by the gas-burner 67. Connector (1 will naturally assume the position shown in dotted line in Fig. 1, the heat being maintained at such a point that the terminal-plugs are allowed to escape by the melting of the fusible sections and the spreading of the spring-contacts 8, each cord and plug assuming its normal position under the infiluence of the take-up devices 52 ready for the next call.

What I claim, and desire to secure by Letters Patent, is-

1. The combination in a telephone exchange of a series of independent, movable circuit-terminals, a series of independentlymovable, portable connecting devices and means for automatically uniting pairs of circuit-terminals with a connecting device, at a common point, successively.

2. The combination in a telephone exchange of a series of independent, movable circuit-terminals, a series of independentlymovable, portable connecting devices, having receptacles for said circuit-terminals, and means for automatically uniting pairs of circuit-terminals with a connectingdevice,at one common point, successively.

3. The combination in a telephone eX change of a series of independent, movable circuit-terminals and a series of independently-movable, portable connecting devices having receptacles for said circuit-terminals; means for automatically uniting pairs of said circuit-terminals with a connecting device, at one common point, successively, and means for automatically disconnecting said terminals and connecting device.

4. The combination in a telephone exchange of. a series of circuit-terminals, means for moving said terminals in separate and independent paths to one common point, successively, a series of portable connecting devices, and means for presenting said connecting devices, successively, at said common point to receive pairs of circuit-terminals.

5. The combination in a telephone exchange of a series of independent circuit-terminals, means for moving said terminals in separate and independent paths to one common point successively, a series of portable connecting devices, with means for moving said devices, successively, to said common point to receive the circuit-terminals and for displacing said connected terminals and con necting device.

6. The combination in a telephone -exchange of a series of movable circuit-terminals, means for moving said terminals in separate and independent paths to one common point, successively, a series of connecting devices having sockets toreceive said termimals, means for presenting said devices at said common point, successively, means for displacing said connected terminals and connecting device and means for automatically releasing said terntinals and returning them to normal positions.

7; The combination in a telephone exchangeof a series of main and sub station circuits, an automatic call-transmitter at a substation, a selecting device at the main station operated by said transmitter; means for antomatically connecting circuits in pairs controlled by said device and means for disconnecting said circuits by the influence of heat.

8. The combination in a telephone exchange of a series of main and sub station circuits, an automatic call-transmitter at a substation, a selecting device at the main station operated by said transmitter, means for an-' tomaticallyconnecting circuits in pairs controlled by said device and means for disconnecting said circuits including a heated support and a source of artificial heat.

9. The combination in a telephone exchange of a series of main and sub station circuits, a switching device at the main station for connecting said circuits in pairs and means for disconnecting said circuits by the gradual application of heat to the connecting device.

10. The combination in a telephone exchangeof main and sub station circuits, an automatic call-transmitter at a substation; a

' selecting device at the main station consisting of (a) a series of movable parts or eletrolling parts or elements, in number a fractional' part of the first-named series, (0) means for arranging said second series of elements operated by said transmitter, movable circuitterminals, one for eaclrcircuit, and suitable operating con nections between said terminals and the first-named elements, respectively.

' 11. The combination in a telephone exchange of main and sub station circuits, an automatic call-transmitter at a substation; a selecting device at the main station consisting of (a) a series of movable parts or elements, one for each circuit, (b) a series of controlling parts or elements, in number a fractional part of the first-named series, (0) means for arranging said second series of elements operated by said transmitter, movable circuitterminals one for each circuit and operating connections between said terminals and the first-named elements, respectively, each such connection including a local circuit, an electromagnet and a circuit-closer.

12. The combination in a telephone exchange of main and sub station circuits, a suitable call-transmitter at a substation, an

' automatic switching device at the main station, a selecting device including two series suitable call-transmitter at a substation, an.

automatic switching device at the main station, a selecting device including a plurality of movable elemental parts arranged in operative relation in two series, one series controlling the switch, the other series control-- ling that first named, a moving electromagnet presenting its armature-bar to each elemental part in the second series in succession,

and means whereby said magnet arranges pattern determined by transmitted impulses.

14. The combination in a telephoneexchange of main and sub station circuits, an automatic call-transmitter at the substation including a perforated strip or medium, an automatic switching device at the main station, a selecting device including two series of movable elemental parts arranged in operative relation, one series controlling said switching device, the second series controlling that first named, a moving electromagnet presenting its armature-bar to each elemental part in the second series in succession andmeans whereby said magnet operates to arrange said elemental parts in accordance with the perforations and spaces in said perforated strip.

15. The combination in a telephoneexchange of main and sub station circuits, an automatic switching device at the main station operating to connectcircuits in pairs,

means for controlling said switching device characteristically marked or perforated to vice at the main station, the latter consisting.

of two series of bars, strips or elements, each series movable in planes at right angles and an electromagnet device in circuit with said transmitter; said device operating to arrange one series of elements in two divisions corre-v sponding to the perforated and unperforated spaces in said portable strip or medium.

17. The combination in a telephone -,ex-

change of a series of main and sub station eirdevice, a series of circuit-terminals, a series of rods or supports in which said terminals are separably located, respectively, means whereby said rods or supports are each movable in a separate, distinct, and independent plane to project said terminals at a common point, and means whereby said call-transmitter automatically controls said switch.

18. The combination in a telephone-exchange of a series of main and sub station circuits, a suitable call-transmitter at a substation, automatic switching apparatus at the main station including a suitable selecting device, a series of circuit-tertninals and a series of rods or supports, on which said terminals are separably supported, respectively,

means whereby said rods or supports are each free to move in a separate, distinct and independent plane to project said circuit-terminals ata common point and a suitable connecting device separably supported at said point.

19. The combination in a telephone-exchange of a series of main and sub station circuits, a suitable call-transmitter at a substation, automatic switching apparatus at the main station including a suitable selecting device, a series of circuit-terminals, a flexible cord for each terminal, a retracting device for each cord, a series of rods or supports on which said terminals are separably supported, respectively, means for moving each rod or support in a separate, distinct, and independentplane into engagement with a connecting device located at a point common to all saidterminals, a suitable connecting device, and means for displacing said connecting device when the talking-circuit is formed.

20. The combination in a telephone-exchange of a series of -main and sub station circuits, a suitable call-transmitter at a substation, automatic switching apparatus at the main station including a series of circuit-terminals, a series of rods or supports on which said terminals are separately supported, respectively, means for moving each rod or support in a separate plane to project said terminals at a common point, and a suitable detachable connecting device located at the common point.

21. The combination in a telephone-exchange of a series of main and sub station circuits, a suitable call-transmitter at a substation, automatic switching apparatus at the main station including a series of circuit-terminals, a series of rods or supports, one for each circuit-terminal, means for moving each rod or support in a separate plane to carry its terminal to a common point, a detachable connecting device at said common point and means for shifting the position of said connecting device to receive the second circuitterminal. g

22. The combination in a telephone-exchange of a series of main and sub stat-ion cir cuits, a suitable call-transmitter at a substation, automatic switching apparatus at .the main station including a series of circuitterminals, a series of rods or supports, one for each circuit-terminal, means for moving each terminal in a separate plane to acominon point, a detachable connecting device a said common point,an(l means for shifting the position of said connecting device and for disconnecting said circuit-terminals.

23. The combination in at telephone-exchange of a switching apparatus including a connecting device for connecting circuits in pairs and means for fusing the connecting device. I

24. The combination in a telepl1one-exchange of a series of substation circuit-terminals, means for automatically projecting and connecting said terminals in pairs at a common point, a series of detachable connectors therefor and means for automatically disconnecting said terminals.

25. The combination in a telephone-exchange of a switching apparatus including independently movable circuit terminals, means for presenting said terminals at a common point, a series of portable connectors having sockets, means for presenting said connectors successively at said common point, a selecting device and means for operating said device to connect circuits in pairs.

26. The c mbination in a telephone-exchange of a switching apparatus, including a series of detachable connectors and means for advancing said connectors singly and successively; with a selecting device consisting of a plurality of movable, elemental parts, arranged in two series; means whereby one of said series controls the other; means whereby the cont-rolled series operates the switching apparatus, and a suitable moving or traveling device to control one series of elements of the selecting device.

27. The combination in a telephone-exchange of a selecting device consisting of a plurality of movable blades or bars arranged at an angle to each other in separate planes, a traveling magnet to control one of said series of bars, a circuit for said magnet and a suitable transmitter in said circuit.

28. The combination in a telephone-exchange of a series of longitudinally-movable bars; a series of pivoted bars in a plane parallel thereto, a traveling magnet movable into position to divide said longitudinal bars in two groups, a suitable transmitter and a circuit including said magnet and transmitter.

29. The combination in a telephone-exchange of a series of independent, movable circuit-terminals, a series of movable connecting devices having sockets or terminalreceptacles; means for selecting terminals to be connected, consisting of two series of movable elements, one series controlling the circuit-terminals, respectively, the second series collectively controlling the first; an automatic transmitter at a substation having a IIO series bf portable circuit-controlling devices each divided into two unit-spaces arranged 'transmitter at a substation, a selecting device at the main station, means for controlling said'selecting device operated by said transmitter; a switching device for uniting circuits in pairs, consisting of a series of 'movable circuit-terminals and portable connectors having sockets or receptacles, and means for including said connectors 1n circuit, successively, to unite pairs of circuit-terminals.

31. The combination in a telephone exchange of a series of circuits, a suitable calltransmitter at a substation, a selecting device at the main station, means for controlling said selecting device operated by said transmitter; a switching device for uniting circuits in pairs, consisting of a series of movable ciromit-terminals and detachable connecting devices having terminal receptacles, means for -including said connecting devices in circuit,

successively, to unite pairs of circuit-terminals and means for automatically disconnecting said circuit-terminals.

WILLIAM BALDWIN VANSIZE. Witnesses:

ANNA M, DONLEVY, THEODORE L. CUYLER, Jr.

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