US2356116A

US2356116A - System and apparatus for facsimile telegraphy

Info

Publication number: US2356116A
Application number: US412405A
Authority: US
Inventors: Garvice H Ridings
Original assignee: Western Union Telegraph Co
Current assignee: Western Union Telegraph Co
Priority date: 1941-09-26
Filing date: 1941-09-26
Publication date: 1944-08-15
Anticipated expiration: 1961-08-15
Also published as: BE470451A; FR939036A; BE467897A

Description

Aug. 15, 1944. G. H. RIDINGS SYSTEM AND APPARATUS FOR FACSIMILE TELEGRAPHY Filed Sept. 26, 1941 4 Sheets-Sheet 1 7 FIGJ INVENTOR G. H. RIDINGS 1944- G. H. RIDINGS 2,356,116

SYSTEM AND APPARATUS FOR FACSIMILE TELEGRAPHY [:1 in: m

Filed Sept. 26, 1941 4 Sheets-Sheet 2 IG 2 lNVENTOR H. RIDINGS ORY TO FIG. 3

. Aug. 15, 1944. G. H. RIDINGS SYSTEM AND APPARATUS FOR FACSIMILE TELEGRAPHY Filed Sept. 26, 1941 4 Sheets-Sheet 5 213 $7285 ,ZBI

INVENTOR G. H. RIDINGS AT ORNE Aug; 15, 1944. G. H. RIDINGSV' SYSTEM AND APPARATUS FOR FACSIM ILE TELEGRAPHY Filed se i. 26, 1941 4 sheets-sheet 4 INVENTDR G. H RIDINGS DEPOSIT zNclL INDICA MESSAGEEWI THANK YOU F IG. 4

AMPLIFIER SIGNAL INVERTER AMPLIFIER Patented Aug. 15, 1944 SYSTEM AND APPARATUS FOR FACSIMILE TELEGRAPHY Garvice H. Ridings, Summit, N. J., assignor to The Western Union Telegraph Company, New York, N. Y., a corporation of New York Application September 26, 1941, Serial No. 412,405

(Cl. l78--6.6)

19 Claims.

This invention relates to telegraph systems and particularly to facsimile systems capable of transmitting messages, pictures and other material in facsimile, and it should be understood the term messages as generally used herein is intended to cover all material capable of facsimile transmission.

An object of this invention is to provide a facsimile system constructed and arranged to make accessible to a customer the material for preparing a message and to then transmit the message to a central oflice receiving apparatus, or the like.

A further object is to provide an automatic facsimile system having means for indicating to and collecting from a customer the cost of any message the customer wishes sent.

A still further object is to provide an automatic facsimile system the operation of which is adapted to be started by a customer after he has made a preliminary deposit of a minimum amount of money.

Another object of the invention is to provide a facsimile system in which a customer, after procuring the material for preparing a message from a coin controlled dispensing mechanism, may be provided with additional material at no extra cost if for any reason the first message is unsuitable for recording purposes.

These and other objects which will be apparent to those skilled in the art are accomplished by the present invention, one embodiment of which is shown in the accompanying drawings, in which:

Fig. l is a perspective view of the transmitting apparatus:

Figs. 2 and 3 taken together illustrate diagrammatically the essential parts of the transmitting apparatus, together with the control circuits therefor;

Fig. 4 shows diagrammatically one type of recorder which may be employed, together with the control circuits therefor; and

Fig. 5 is a modified form of coin handling mechanism which may be employed at the transmitter.

In the present invention an automatic facsimile transmitting apparatus is connected by a communication circuit to a receiving apparatus arranged to automatically record in facsimile from the signal impulses transmitted thereto. Mechanism is provided at the transmitter to supply a customer, upon deposit of a minimum amount of money, with means for starting and operating the transmitting apparatus. As illustrated, this device is arranged to supply a message blank and a pencil with which to prepare the message to be sent, together with a key for operating the transmitter.

The facsimile transmitting apparatus is located in a box adapted to be mounted on any suitable support such, for example, as a wall, a pedestal or the like; The transmitting apparatus may be similar to that described in the application of Wise et al., Serial No. 269,314, filed April 22, 1939, now Patent No. 2,262,715, granted Nov. 11 1941, for System and apparatus for automatic facsimile telegraphy and reference is made thereto for a detailed mechanical description thereof. In the present disclosure only such mechanical details are shown as are necessary to a complete understanding of this invention.

Transmitting apparatus The transmitting apparatus is housed in a box 10 which may be placed in any convenient location for operation by a customer. A coin slot II is provided for the reception of a coin of predetermined minimum denomination which the customer may use to secure a blank sheet and a pencil. This material is deposited by mechanism to be described in a pan l2 which is accessible to the customer through a suitable opening formed in the housing In. After the message has been inscribed on the blank, a key which may be attached to the pencil is inserted in a lock [3 to start the transmitting apparatus. The transmitter is also provided with a plurality of signs or legends l4 which are adapted to be selectively illuminated so as to instruct him in the manipulation of the apparatus. When the transmitter has been operatively conditioned by means of the key and lock l3, the Deposit pencil sign is illuminated adjacent to a chute 15 which is provided for the reception of the pencil after the customer has finished with it. Following the deposit of the pencil in the chute l5, a slot [6 which, prior to the deposit of the pencil, has been blocked, is opened so that the customer may insert the message bearing sheet therein. The sheet is conveyed by a chute, in the manner set forth in the copending application referred to, to the scanning mechanism H, a portion of which is visible to the customer through a window formed in the housing ill for that purpose. When the message has been transmitted and examined by'the receiving operator who computes the cost of forwarding it to its ultimate destination, this additional cost is registered by means to be disclosed hereinafter on the indicators 18. Also,

the Message accepteddeposit above amount sign is illuminated. The customer then deposits the correct amount in the appropriate coin slots i9 provided for this purpose. Following the acceptance of the message, the sheet on which it is inscribed is removed from the scanning apparatus l1 and deposited in a bin which is accessible only to authorized persons through a locked door 20.

For the description of the rest of the transmitting apparatus and its operation reference will be made particularly to Figs. 2 and 3. A chute 2! of elongated boxlike form extends from the slot 16 (Fig. 1) to a point adjacent a copyholder or message scanning cylinder 22 which is mounted on a shaft 23 adapted to be driven through suitable gearing by a synchronous or other speed controlled motor 24. A photocell 25, an exciter lamp 26 and appropriate optical mechanism forming the scanning apparatus are mounted on a carriage 27 which is movable longitudinally of the rotary cylinder 22 to scan a message mounted thereon. A serrated disc 23 constituting a light chopper is included as part of the scanning mechanism and is rotated by a motor 29.

The scanning carriage is moved longitudinally of the cylinder 22 by a rotary feed screw 3| which is also driven by the synchronous motor 24 and is adapted to be connected to the carriage by a half-nut 32 formed at one end of a lever 33 which is pivoted on a supporting bracket 34 on the carriage. An armature 35 is attached to the lever 33 so that the latter may be moved into engagement with the feed screw 3| by means of a half-nut operating magnet 35.

The chute 2! extends from the slot I6 downwardly to a point adjacent the cylinder 22 and is positioned substantially tangent thereto. The upper end or mouth of the chute is normally closed by a slide 31 connected to the end of an armature 33 of a chute closure magnet 39. A spring 4| normally holds the slide in chute closing position when the magnet is deenergized.

The scanning cylinder 22 is provided with a circumferential row of teeth 42 by means of which a message sheet 43 which is fed downwardly through the chute 2! is seized and wrapped around the scanning cylinder as described in the copending application referred to. The sheet is so formed as to require its insertion in the chute in the manner necessary to insure its being properly positioned on the cylinder for correct scanning of the subject matter inscribed thereon.

The scanning cylinder is provided with a circumferential groove 44 in which an arm 45 travels when there is no sheet mounted on the cylinder. The arm 45 is fastened to the end of a rock shaft 46 and is normally urged into groove 44 by aspring 41. The other end of the rock shaft 45 has affixed thereto a contact arm 48. As soon as a message bearing sheet is mounted on the scanning cylinder 22, the arm 45 is lifted from the groove 44 and bears on the surface of the sheet, thereby operating the contacts controlled by the arm 48 for a purpose to b described hereinafter.

When the message inscribed on the sheet has been scanned and the signals generated by the scanning operation transmitted to a receiver for recording, the sheet 43 is removed from the scanning cylinder 22 by means of a stripper blade 49. A stripper or peel magnet when energized moves the blade 49 so that the upper end thereof is moved into position against the sheet 43. The

dimensions of the sheet are such that a gap is left between the edges thereof when it is wrapped around the cylinder so that when the end of the stripper blade 49 is moved against the cylinder, the upper edge thereof slips under one edge of the message sheet as it is rotated, thereby pulling the sheet away from the teeth 42 and permitting the sheet to fall into a bin or other convenient receptacle.

The dispensing mechanism and the coin controlled apparatus is illustrated diagrammatically in Fig. 3 to Which reference will now be had. The supply of blank sheets is formed by laying out in slightly overlapping relation on a belt 52 a series of blanks such as 53. The blanks and the belt are then rolled up to form a supply roll 54 around a mandrel 55 which is mounted for rotation in a pair of spaced brackets such as 56. As the belt 52 leaves the supply roll 54, it is passed around a pulley 51 mounted on a shaft 58 journaled at the ends thereof in brackets 59. The belt 52 is then attached to a takeup reel or pulley 6| which is driven by a motor 62 through suitable reduction gearing 63,

Also attached to the shaft 58 is a cam 64 by means of which a pair of contacts 65 is periodically opened to control the motor 62 in a manner to be described. The shaft 58 also has attached thereto a finger 66 which is adapted to cooperate with a supply of pencils 6! stacked in a rack 68 which has formed at the bottom thereof a pair of yieldable clips 59.

When the motor 62 is started in response to the deposit by a customer of a coin of predetermined denomination, the belt 52 is drawn from the supply roll 54 by the takeup reel 61 until one of the blanks 53 has been unwrapped sufficiently to be freed from the roll. The sheet thus freed falls into the pan i2 from which it may be taken by the customer. At the same time the shaft 58 in making one complete revolution moves the finger 65 so as to force the lowermost pencil of the supply 6'! from the yieldable clips 69 from which it is permitted to fall into the pan I2 along with the sheet. After this sequence of operation the cam 64 opens the contact 65 thereby stopping the motor.

In order to start the motor 62, the customer deposits a coin in the slot H by which it is conveyed downward to strike a switch arm H movin it to close a contact 72. The coin then falls into areceptacle 13. The closure of the contact '12 starts the paper and pencil dispensing mechanism in a manner to be subsequently described. A plunger 14 forms the movable core of a solenoid 2'5 which when energized moves the plunger through suitable openings 16 formed in the slot ll adjacent the mouth thereof, thereby blocking the coin chute and preventing the insertion of a coin therein. This solenoid is controlled either by contact 11 or by contact 78. The contact H is closed in response to the downward movement of a pivoted arm i9, the free end of which is in constant contact with the outside of the roll 54. This mechanism is arranged so that when the supply roll becomes exhausted the contact 71 is closed to block the coin chute H Similarly, the contact 78 is closed by means of a sliding member Bl which is maintained in contact with the uppermost one of the pencils 61. When the supply of pencils is exhausted, the contact 16 is closed to disable the coin slot l 1.

Each one of the pencils 6? is provided with a key 82 which is employed to operate the lock I3 (Fig. 2) by means of which the transmitting apparatus is started. The starting of this apparatus is communicated by suitable signals to the .receiving station to operate apparatus thereat to transmit another signal back to the transmitting station causing the Deposit pencil" sign to be illuminated. A solenoid 83 having a movable plunger 84 cooperating with an opening 85 in the pencil chute I5 is provided to normally blockthe chute Simultaneously with the lighting of the Deposit pencil sign, the solenoid 83 is energized to unblock the pencil chute. The pencil is then deposited by the customer in the chute I5 and in passing therethrough to a receptacle 86 strikes a switch arm 81 to operate a set of contacts. These contacts perform control functions which will be described more fully hereinafter.

Following the transmission of the message and its inspection at the recording station by an operator, the group of registers I8 is operated by the receiving operator to indicate the additional amount of money to be deposited by the customer. Simultaneously with this operation the Message accepteddeposit above amount sign is illuminated and a closure member 89 is withdrawn from the mouths of the coin chutes I9. The movement of the closure member is effected by energizing the solenoid 9| to actuate its armature 92 which also causes the movement of a switch arm 93 into engagement with a contact 94. This latter operation connects a microphone 95 into the sending circuit. The microphone is located adjacent the lower ends of the coin chutes 89 so as to pick up the sounds made by the coins striking bells 96 in passing from the chutes I9 into a receptacle 9?. Each one of the coin chutes i9 is dimensioned to take a different denomination of coin and each one of the bells 96 has a distinctive tone so that both the number and denomination of the coins deposited may be determined by the receiving operator who is listening while the customer deposits the additional money required.

Recording apparatus The receiving or recording apparatus is usually installed at a central office. It is shown diagram matically in Fig. 4 and in complete detail in Patent 2,255,868, granted to R. J. Wise et al. on September 16, 1941, for System and apparatus for facsimile telegraphy. The blanks upon which the messages are to be recorded are mounted on recording cylinders which are inserted in the receiving apparatus one at a time. The recording cylinder is rotated and during rotation a marking stylus which bears on the recording blank and has impressed thereon electrical impulses received over the communication circuit, scans the blank in a direction parallel to the axis of the recording cylinder. Mechanism is provided for removing a recording cylinder and blank after a message recording operation, and replacing them with a fresh blank and cylinder. Mechanism is also provided for storing a plurality of blank bearing recording cylinders in a magazine from which they can be automatically fed in succession to the receiving apparatus.

As illustrated in Fig. 4, a cylinder IN is shown in position. It has axial arbors I02 and I03 by which it is suspended for rotation between centering spindles I04 and I05, respectively. An arm I06 is pivoted on the spindle I04 and extends in the direction of the cylinder to engage a pin I31 projecting radially from the spindle and also a pin I08 extending radially from the arbor I02.

The arm I06 is urged into engagement with the pins by a spring I09, one end of which is attached to the arm and the other end to the spindle I04. This device serves to rotate the recording cylinder IOI when the spindle I 04 is rotated. The spindle is rotated by a motor III through suitable reduction gearing H2 and a friction clutch II3 which permits stopping rotation of the spindle I04 without stopping the motor. A disc II4 having a notch formed in its periphery is secured to the centering spindle I04. An arm or latch I I5, pivotally mounted on a support (not shown) engages the notch when acted upon solely by a retractile spring II6. An electromagnet II'I, termed the framing magnet, is adapted when energized to lift the latch H5 out of the disc notch and permit rotation of the centering spindle I04.

A recording blank I2I is wrapped around the recording cylinder IOI, and is secured thereto by suitable means such, for example, as the elastic rings or holding members I22. The blank is mounted on the cylinder so that the location of the lap I23 of the blank edges invariably bears a definite relation to the location of the notch in the disc II4. This arrangement is to secure proper phasing between the receiving apparatus and the transmitting apparatus, as will be described more fully hereinafter.

A scanning carriage I24 is slidably mounted on guide rails I25 parallel to the axis of rotation of the cylinder IOI. A lever I26 pivotally supported on the carriage carries at one end a recording stylus I21 and a half nut I28 adapted to engage a threaded feed screw I29 rotated at a suitable speed by the motor III through the reduction gearing H2. The other end of the lever I 26 is operatively associated with a half nut magnet I3I. When the latter is deenergized, a spring I32 moves the lever to cause the half nut to engage the feed screw, and the stylus to contact a recording blank on the cylinder IIlI. As shown in Fig. 4, engagement of the half nut and feed screw moves the carriage I24 to the right against the tension of a retractile spring I33. At the end of a scanning and recording operation, energizing the half nut magnet I3I disengages the half nut from the screw and the carriage is returned to its initial position, as illustrated, by the spring I33.

As illustrated, the recording machine has facilities for automatically discharging a recording cylinder after a recording operation and for feeding a fresh cylinder and blank into the machine. A magazine or supply of fresh cylinders is provided (one Of which I34 is indicated in dotted lines). A rack for storing fresh cylinders is formed by two rail members I 35 and I36, mounted on a pair of supporting brackets I31 and I38, respectively, and spaced apart slightly more than the length of a cylinder IOI. A pair of resilient upright members I39 and [M are secured to the rail members I35 and I36, respectivel and cooperate with an auxiliary pair of spaced rails I42 and I43 respectively, to guide the stored cylinders toward the scanning device. The cylinder I34 next to be positioned in the machine is held in readiness by' having its arbors I44 supported by the upper ends of a pair of detents, one of which I45 is shown. Each detent is pivoted at its lower end on the associated rail member and is normally held in cylinder restraining position by a resilient member such as a spring I46.

At the end of a scanning and recording operation a cylinder changing motor I4! is operated to drive a shaft I48 through a worm and gear drive I49. Cams I52 and I53 are secured to this shaft. A pivoted bell crank I54 has a fork I55 on one end engaging a pair of pins I55 on the centering spindle I05, and a cam follower I51 on the other end engaging the cam I52. Obviously, rotation of the cam I52 moves the spindle longitudinally against the tension of a spring I53.

Longitudinal movement of the spindle withdraws it from engagement with the cylinder arbor IE3 permitting the cylinder to drop onto a cradle formed by grooves in a pair of members I59 and IGI, mounted on a rocker shaft I82 journaled in any convenient bearings, Means for rocking the shaft includes a crank arm I63 secured thereto and having a cam follower I64 secured to its end and engaging the cam I53. Hence, rotation of the shaft I48 by the motor I41 causes the cam I53 to rock the shaft I62 clockwise as viewed in Fig. 4, thereby imparting a similar movement to the cradle members I59 and IBI. This moves the latter outwardly until a position is reached in which the cylinder IOI rolls by gravity from the cradle recesses into any suitable receptacle, conveyor or the like. Further rocking movement moves extensions I58 and I61 of the cradle members I59 and IBI, respectively, into engagement with the associated detent I45 which are thus moved out of the downward path of the arbors of recording cylinders stacked in the racks 539, I42 and MI, I43, permitting the next cylinder to drop so that its arbors rest on the upper edges of the extensions arms I 66 and I61. Continued rotation of the cam I53 returns the cradle members to upright position under influence of a spring I68 connected to one of the cradle members. This withdraws the arms I66 and I61 permitting the cylinder arbors to roll into the cradle recesses and the fresh cylinder is carried into position to be engaged by the centering points on the spindles I34 and IE5, When in the cradle recesses the axis of the cylinder lies slightly below the center of rotation provided by the centering spindles but the conical form of the supporting centers lifts the cylinder when the spindle I95 is moved inwardly. The cylinder is thereby held free to rotate.

Operation of the cylinder changing cycle is initiated by applying power to the motor I41 after a recording operation by means to be more fully described hereinafter. A cam I1I is so oriented on the cam shaft I48 with respect to the cams I52 and I53 that, at the completion of a cylinder changing cycle, it operates an associated switch I12 to momentarily break the contacts I13. Through means to be described, this cuts off power to the motor. The arrangement is such that before the motor is brought to a stop by its braking system, the cam I1I moves suificiently to permit reclosing of the contacts I13.

Communication circuit The communication circuit connecting the transmitting apparatus and the receiving apparatus comprises a pair of conductors LI and L2 which are used simultaneously for the transmission of the alternating current facsimile signals or message impulses and the direct current control signals by which the operation of the transmitting and receiving apparatus is controlled.

The facsimile signals originate at the photoelectric cell 25 (Fig. 2) which is connected to an amplifier I14, the output circuit of which is connected through a pair of blocking condensers I to the conductor LI and L2. The purpose of the blocking condensers is to isolate the alternating current facsimile signals'from the direct current control signals. The polarity of the direct current potentials which are applied to the conductor LI is controlled by apparatus at the receiving station for the purpose of operating a polar relay I16 connected to this conductor at the transmitting station. Similarly, the polarity of the direct current potential applied to the conductor L2 i controlled by the apparatus at the receiving station for the purpose of operating a polar relay I11 connected to this conductor at the transmitting station. Each of these polar relays is of the three-position type whereby the tongue is moved to one extreme contact in response to one polarity of potential, to the other extreme contact in response to the opposite polarity of potention, and to a mid-position disengaged from both of the extreme contacts in response to a nocurrent condition. The tongue I18 of the relay I16 cooperates with contacts M and S. The tongue I19 of the relay I11 cooperates with contacts M and S.

It should be understood that a number of separate transmitting mechanisms will normally be connected to a single communication circuit in a party line system and that each transmitter is adapted to be locked against operation when any other transmitter on the same line is operating, as will be described hereinafter and as is fully set forth in the copending application, Serial No. 269,314.

Operation The operation of the system will be described in connection with Figs. 2, 3 and 4 taken together. It is assumed that power is supplied at the transmitting apparatus by connecting a suitable source of alternating current ISO to the bus bars A and B. In connection with the description of Figs. 2 and 3, the bus bar A is an electrical extension of the bus bar A when the transmitting apparatus is operatively conditioned.

To obtain a blank and a pencil the customer inserts a coin of predetermined denomination in the slot Ii. In passing through the chute into the receptacle 13 the coin completes a circuit which may be traced from the A bus bar, through contact 12, through the winding of relay IBI and contacts to the 3 bus bar. Relay I8I operates and locks at a make contact I32. Contact I83 completes a circui for the operation of the motor 62. The dispensing apparatus thus is started upon the cycle of operation previously described to supply a blank 53 and a pencil 81 to the customer, following which the contact 65 is momentarily opened to unlock relay I8I and stop the motor 62.

The customer then prepares the blank in the usual manner and, by means of the key 82 mounted at one end of the pencil, operates the lock l3. This operation closes contacts I84 and I85 causing the energization of the operating winding I86 for the multicontact switch I31. The operating circuit for this winding may be traced from the A bus through the winding, the closed contact I84 and contact I83 adjacent the pencil chute I5 to the bus bar B. The energization of the multicontact switch operating winding I86 causes the downward movement of the armature I85 thereby moving the switch arm I90 to control the plurality of contacts associated therewith. Closure of one of these contacts IBI connects the A bus bar to the A bus bar. Connected between the A bus bar and the B bus bar is the synchronous driving motor 24 for the transmitting apparatus, the chopper motor 29 and the exciter lamp 26 of the optical scanning apparatus. The starting of these motors causes the drum 22 to revolve and light from the lamp 26 to be reflected from the revolving drum onto the photocell 25, the light being periodically interrupted by the light chopper 28. Thus an alternating current carrier current is generated and, after being amplified by the amplifier I14, is transmitted over the line conductors LI and L2 to the receiving station.

At this station, the line jack I92 being in a normal condition, the line conductors LI and L2 are connected to a line amplifier I93. vacuum tubes I94 of the line amplifier is connected to the positive terminal of a grounded source of plate current through the winding of a relay I95. Thus, when the amplifier is operated by the receipt of the carrier signaling frequency, the relay I95 is operated. One of the contacts I 96 of this relay operates a signal lamp I91 to attract the attention of an attendant to the fact that a call has been received. Another contact I98 operates a second signal lamp I99 which is located adjacent the jack I92 to identify the line circuit over which the call is being made. Another contact 290 of the relay I95 connects positive direct current potential to the line conductor L2.

The effect of this positive potential on line conductor L2 is to move the armature IE9 of the three position line relay IT! at the transmitter from its mid-position into engagement with its marking contact M. Thus the bus bar A is connected to one terminal of a locking winding 295, the other terminal of which is connected to the B bus bar. This winding becomes energized to attract its armature 292 which has formed adjacent the upper end thereof a hooked portion which is adapted to move over the top of the armature I 89, thereby securing this member in its lower position independently of the operating winding i236. Also, the engagement of armature I19 of relay I H with its marking contact M closes a circuit from the A bus bar through this contact, through contact 283 of the multicontact switch, the winding of relay 294, the key controlled contact Hi5, the contact I88 associated with the pencil chute I5 to the B bus bar. Relay 20s is operated and becomes locked through its make contact 285 so that it remains operated independently of the key controlled contact. The closure of contact 295 of this relay connects the A bus bar to one terminal of the Deposit pencil 2M and to one terminal of the pencil chute control magnet 83. The other terminals of these devices are connected to the B bus bar. Thus the pencil chute I5 is unblocked and the Deposit pencil sign is illuminated. Since th nulticontact switch I8? and the relay 26" are locked up independently of the key controlled contacts IM and i85 respectively, the key may be removed from the lock I3 and the pencil deposited in the chute I5.

The passage of the pencil through the chute into the receptacle 86 momentarily opens contact 2533 thereby releasing relay 204 to extinguish Pencil deposit lamp 291 and to deenergize the chute control magnet 83. At the some time the pencil momentarily closes contact 239 thereby closing the operating circuit for relay This circuit may be traced from the A bus bar by way of armature I18 of line relay I76 through the closed drum contact 2! I, through One of the.

the Winding of the relay 209 and the contact 208 to the B bus bar. Closure of contact 2 I 2 of relay 209 looks the relay independently of the operating circuit. Also, closure of a make contact 2I3 connects the A bus bar to one terminal of the message chut magnet 39 and to one terminal of the Deposit message lamp 2I4. The other terminals of these devices are connected to the B bus bar. Thus the Deposit message sign is illuminated and the closure 31 is removed from its blocking position, thereby providing access to the chute 2I from the slot I6 formed in the housing Id of the apparatus.

The customer then deposits the sheet; bearing the inscribed message into the chute 2I by means of which it is conveyed to the scanning apparatus where it is seized by the teeth 42 and wrapped upon the drum 22 in the manner set forth in the oopending application Serial No. 269,314. When the sheet 43 has been completely mounted upon the cylinder 22, the arm 45 is forced out of the groove 4 3, thereby opening the drum contact 2| I. This deenergizes relay 299 causing the chute magnet 39 to be deenergized and the Deposit message lamp to be extinguished.

While these operations are being performed at the transmitting station, an attendant at the receiving station responding to the call indicated by the illumination of lamps I9! and I99 inserts a plug 2I5 into the line jack I92 which is effective to connect recording and control apparatus to the line conductors LI and L2 and to disconnect the line amplifier I93 and its associated equipment from the line conductors. Thus the line conductors LI and L2 are connected through a pair of blocking condensers 2I6 and through a power level adjustment pad 2I'I to the input side of an amplifier 2I8. The output of the amplifier 2I8 is connected through a signal inverter 2I9 to the recording stylus I21.

The line conductors LI and L2 are also connected to the control signaling apparatus through a pair of inductances or choke coils 22I. The control apparatus consists of a plurality of relays, the contacts of which apply signaling potentials to the line conductors and which are themselves controlled by a rotary switch 222. The rotary switch is made up of four levels, each of which is provided with ten contact studs and a movable arm for cooperation therewith. The four contact arms are moved simultaneously and each is provided with a bridging wiper whereby connection is made with each of the studs before the previous connection with another of the r studs is broken.

It should be noted that while the rotary switch is in its No. 1 or idle position, relay 223 is energized and relay 224 is deenergized under the respective control of

switch arms

225 and 226. Thus when the plug 2I5 is inserted in the line jack I92, the make contact of relay 223 connects positive potential to line conductor L2 leaving the line conductor LI with no direct current potential applied thereto. These are the signaling conditions in effect before the plugging up operation and it is seen that they are not disturbed when this operation is performed.

After having inserted the plug 2 I5 into the line jack I92, the receiving attendant adjusts the power level of the received signals by means of the pad 2H. He is aided in making this adjustment by a meter :21 connected in the output circuit of one of the amplifier tubes 228. This adjustment is made for the signals generated by the transmitter in scanning the heading of the blank from which the transmission is to be made.

After securing the proper adjustment of the power of the received signals, the receiving attendant moves the rotary switch 222 to its No. 2 position for recording. Thus by means of

contact arms

225 and 225 of this switch in cooperation with their No. 2 studs, both relays 223 and 224 are ener ized, thereby connecting positive potential to line conductor LI as well as L2.

At the transmitting station this positive potential on conductor LI is applied to the three position polar relay I16 thereby moving its armature I78 from its mid-position into engagement with its marking contact M. Thus a circuit is closed from the A bus bar through the marking contact of relay I15 to one terminal of the Message being transmitted lamp 229 and also to one terminal of the half-nut magnet 35. The other terminals of these devices are connected to the B bus bar, thus causing them to be energized The energization of the half-nut magnet 36 causes the half-nut 32 to become energized with with the feed screw 3i thereby imparting a horizontal movement to the carriage 2'! to initiate scanning of the message sheet 43. As soon as the scanning operation has progressed sufliciently to cause the impingement of the light spot upon a black spot 23I placed adjacent one edge of the blank 43, an abrupt decrease in the amplitude of the carrier signal generated is effected.

At the recording station as long as the rotary switch 222 is in its No. 1 position, winding 232 of relay 234 is energized. Also, winding 235 of this relay is energized through a circuit which extends from ground through the make contact 236 of this relay, through the winding 235 and make contact 23! of relay 238 to positive potential. As soon as the rotary switch 222 is moved to its No. 2 position, the switch arm 239 in moving off its N0. 1 stud opens the circuit of windin 232 of relay 234. However, this relay remains operated under the control of its left hand winding 35. But, as soon as the amplitude of the facsimile carrier signal is decreased in the manner described, the relay 238, being in the output circuit of one of the amplifier tubes 228, is momentarily deenergized to open its make contact 231. Thus the left hand winding 235 of relay 234 is also deenergized permitting the opening of contact 235. This causes the ground to be removed from the operating circuit of relay 239. This relay in releasing opens its make contact 24I thereby deenergizing relay 242. This latter relay in releasing opens its make contact .243 to interrupt the operating circuit for the half-nut magnet i252. Thus the half-nut I28 is lowered into engagement with the feed screw I29 and the recording stylus I2! is brought into engagement with the surface of the recording sheet 12!. In addition, the release of relay 239 effects the engagement of its back contact 244 to energize the phasing magnet II'I thereby lifting the latch H5 out of the notched disc H4 to permit rotation of the copyholder mechanism. Thus the recording apparatus is started upon a scanning operation simultaneously with the initiation of scanning by the transmitting apparatus.

When the recorder carriage I24 has traveled far enough to the right, as viewed in Fig. 4, to completely record transmitted signals, it closes a contact 2'15 to operate a buzzer 245 by means of which the attcn ant is informed that recording has been completed. The attendant then moves the rotary switch 222 to its No. 3

position. Switch arm 239 on its third stud reenergizes winding 232 of relay 234 to reoperate this relay. Relay 234 in turn reoperates relay 239 which deenergizes the phasing magnet It? to stop rotation of the copyholder I2I. The operation of relay 239 also reoperates relay 242 to release the stylus I21 and the half-nut I28 permitting the spring I33 to return the carriage I24 to its starting position. The fourth arm 24- of the rotary switch 222 connects a ground to a circuit which. includes a serially connected condenser 248 shunted by a relatively high resistance 249 and also the left hand winding 25I of a relay 252. The charging current taken by the condenser is sumcient to energize the winding 25I to operate the relay 252. The clot of the mak contact 253 of this relay closes a circuit through the right hand locking winding 254 which also includes the cam contact I73. The relay is thus locked in its operated position independently of the winding 25L After the condenser 248 has become completely charged, the current which continues to flow through the Winding 25! is limited by the resistance 249 to a value which is insufficient to maintain the relay 252 in its operated condition. The closure of contact 253 also completes the operating circuit of a relay 255. This relay in operating closes a contact 258 to energize the drum changing motor I41 to start a drum changing cycle as previously described. A second contact 251 of relay 255 is also closed to complete an auxiliary operating circuit for the relay 242 so that this relay is prevented from releasing to initiate a scanning movement of the carriage I24 while a copyholder change is being made. At the completion of a drum changing cycle the contact I13 is momentarily opened, as described, and thus interrupts the locking circuit through the winding 254 of relay 252 long enough to permit th release of this relay.

In the event that a fresh copyholder is not installed in the recording apparatus during a drum changing cycle. the centering spindle I55 is permitted to move far enough to the right, as viewed in Fig. 4, to close a contact 258 which completes the operating circuit of a relay 259. The make contact 2EI of this relay then maintains the relay 242 operated to prevent the starting of a scanning operation.

The movement of the rotary switch 222 to its No. 3 position also performs signaling functions over the line conductors LI and L2. Relay 223 is maintained operated, thereby holding positive potential on line conductor L2. Relay 224 is released, thereby disconnecting positive potcntial from line conductor LI. 1

The removal of positive potential from line conductor LI deenergizes relay I16 at the transmitter, thereby disengaging the armature I18 from its marking contact M. Thus, the operating circuit of the half-nut magnet 36 is interrupted, efiecting the release of the half-nut 32 from the feed screw 3| and permitting the return of the carriage 21. The Message being transmitted lamp 229 is also extinguished.

At the recorder the attendant removes the sheet I2I bearing the recorded message and notes the destination, the number of words, and other pentinent data of the message necessary for the computation of the additional charge to be made for forwarding it to its destination. When the additional charge has been determined, the attendant moves the rotary switch 222 to its No. 4

position. In this position the contact arm 241 is disengaged from: its No. 3 contact, thereby restoring the operating circuit for relay 252 to its normal condition. The relay 234 is maintained operated under the control of the contact arm 239 in the No. 4 and all higher numbered positions of the rotary switch. The disengagement of contact arm 225 from its No. 3 contact releases relay 223, thereby disconnecting positive potential from line conductor L2. The engagement of

contact arms

225 and 226 with their respective fourth contacts operates respectively relays 262 and 263. A make contact 264 ofrelay 262 connects line conductor L2 through an offnormal contact 265 of an impulse transmitting dial 266 to negative potential. Make contact 261 of relay 263 connects line conductor L! to negative potential under the control of the dial impulse transmitting contacts 268.

The negative potential which is thus connected to line conductor L2 operates the armature I19 of the transmitter line relay I11 to its spacing contact S. A circuit is thus completed which may be traced from the A bus bar through the spacing contact of relay I11, through contact 269 of the multi-contact switch I81, through contact 21! associated with the half-nut mechanism, through the winding 212 of a stepping magnet to the B bus bar. The stepping switch 213 with which the magnet 212 is associated comprises a rotary switch arm 214 which is normally urged by means of a spring 215 toward the position in which it is shown in the drawings. The arm. 214 is thus maintained in its idle condition in contact with an idle stud. An operating pawl 216 is controlled by the stepping magnet 212 and cooperates with a ratchet 211 so that upon one downward movement of the operating pawl the arm 214 which is attached to the ratchet is moved counter-clockwise a distance of one stud. A retaining pawl 218 also cooperates with the ratchet 211 to maintain the ratchet and switch arm in the positions to which they have been last operated by the operating pawl. Thus, the switch arm 214 is moved step-by-step successively over its associated contacts by successive operations of the stepping mechanism. The retaining pawl 218 is arranged to be disengaged from the ratchet by a releasing magnet 218, thus permitting the restoration of the switch arm 214 to its normal idle position.

Upon the initial energization of the stepping magnet 212 as described, the switch arm 214 is moved into engagement with its first operating stud 28!. A circuit is thus prepared to the operating Winding 282 of the left hand indicator I8.

The recording operator then by means of the dial 266 transmits a number of negative impulses over line conductor LI corresponding to the number of dollars of the additional charge. During the transmission of these impulses the oil -normal contact 265 is open, thereby removing negative potential from line conductor L2, but following the transmission of the dial impulses this contact is again closed.

At the transmitter the negative impulses sent over the line conductor LI efiect successive momentary engagements between the armature I18 of line relay I16 with its spacing contact S. During each engagement the A bus bar is connected through the spacing contact of this relay, through drum contact 283. stepping switch arm 214 and its first operating contact 26L and through the operating winding 282 of the left hand indicator I8 to the B bus bar. Thus, the dialed impulses are applied to the dollars indicator to step it to indicate the necessary amount. Each of the indicators may be constructed. similarly to the stepping switch 213, being provided w th operating and releasing windings. Following the dialing impulses over the line conductor LI, the negative potential is again applied to line conductor L2 by means of the off-normal contact of the dial transmitter to again close the spacing contact of transmitter line relay I11, thereby stepping the switch arm 214 to its second operating contact to which is connected the middle indicator I8. This indicator and the right hand indicator are operated in a similar manner by successive operations of the dial transmitter.

Following the dialing of the last group of impulses the final closure of the off-normal contact of the dial transmitter steps the switch arm 214 from its last operating contact and into engagement with an insulating stud 284 mounted on a switch arm 285 and located in the path of the stepping switch arm. This results in the closure of a contact 286 which connects the A bus bar to one terminal of a lamp 281 and one terminal of the coin chute closure magnet 9|. The other terminals of these devices are connected to the B bus bar, thus causing their operation. The lamp 281 illuminates the Message acceptedplease deposit above amount sign and the magnet 9I withdraws the closure 89 from over the coin chutes l9. The operation of the magnet 9I also effects the engagement of the switch arm 93 with its contact 94 thereby connecting the microphone to the input side of the amplifier I14. As the customer deposits the coins in payment of the additional charge indicated. the number and denomination of the coins are detected by the microphone 95.

Signals corresponding to the sounds thus detected are transmitted to the recording station. where the attendant by means of a telephone receiver 288 determines when the required amount of money has been deposited. He then turns the rotary switch 222 to its No. 5 position. In this position the'switch arm 225 operates relay 223 to apply positive potential to line conductor L2 and switch arm 226 operates relay 224 to apply positive potential to line conductor LI.

At the transmitting station the line relays I16 and I11 are energized to operate their respective armatures I18 and I19 into engagement with their marking contacts M and M respectively. It should be noted at this point that normally armature I19 is maintained in engagement with its marking contact M to connect the A bus bar to one terminal of the holding magnet 29! for the multi-contact switch I81. However, an additional lock'for this switch is provided as long as there is a sheet mounted on the scanning cylinder 22. This circuit may be traced from the A bus bar through a break contact 289 of a relay 29I and a make contact 292 on the multicontact switch to the holding magnet 26!. The operating circuit for relay 29I includes the drum contact 2 which is closed only when there is no sheet mounted on the cylinder. Consequently during the previously described dialing operations the multi-contact switch is maintained operated even though the armature I 19 of relay I11 is disengaged from its marking contact M since at this time the sheet 43 is still mounted on the scanning cylinder 22.

The above described engagement of armature I19 with its marking contact M reconnects the A bus bar with the multi-contact switch locking magnet 204. Also, the engagement of armature I18 with its marking contact M reon the half-nut magnet 36 in the manner des .-ed. A circuit is then established from the A bus bar through marking contact M of relay l'l'l, through the half-nut contact 2&3 to one terminal of the stepping switch release magnet Bid and to one terminal of each of th release magnets such as 294 of the indicators The other terminals of these devices are connected to the B bus bar thereby resulting in the operation thereof. The stepping switch arm 2'! is thus returned to its normal unoperated position and the indicators [8 reset to their normal positions. The open ng of contact 285 of the stepping switch extinguishes the lamp 287 and deenergizes the magnet 8! there by closing the openings to th coin chutes i3 and disconnecting the microphone Operation of the half-nut magnet 35 also closes

contacts

225 and 286 for purposes to be described presently.

The attendant at the receiv ng station then moves the rotary switch 222 to its No. 6 position. Switch arm 225 releases relay 223 and operates relay 297 which applies negative potential to the line conductor L2. Positive potential is maintained on l ne conductor L! by the maintenance of relay 224 in operation under the control of the switch arm 228.

At the transmitting station the positive potential connected to line conductor L! keeps the armature ['58 of the line relay H6 in engagement with its marking contact M therely continuing the energization of the half-nut magnet The negative potential applied to line conductor L2 effects the engagement of 218 of line relay H! with its spacing contact S to close a circuit which may be traced from the A. bus bar through the l ne relay spacing contact, contact 269 of the multi-contact switch $8 through the half-nut contact 295 and the winding of the stripping magnet to the B bus bar. Thus the stripping blade is operated to remove the sheet 43 from the scanning cylinder 22 in the manner described in the copending application Ser al No 269,314.

As soon as the sheet has been removed from the scanning cylinder the drum contact 2! closes to operate relay 28!. This operating circuit may be traced from the A bus bar by way of armature 478 of line relay 1 16 through the drum contact 2!! and through the winding of relay 29! to the B bus bar. Thus the multi-contact switch locking magnet 23! has its operating circuit open at the marking contact M of the line relay H1 and also at the contact 283 of relay 29!. However, the closed half-nut contact 285 maintains a connection from. the A bus bar to the winding of the holding magnet 2%! to keep it energized thereby preventing the release of the multi-contact switch l8! at this time.

The attendant at the recording station then moves the rotary switch 222 to its No. 10 position in which relay 224 is released, thereby disconnecting the positive potential from line conductor L! and relay 291 is k pt operated by the switch arm 225 to maintain negative potential applied to line conductor L2.

At the transmitting station the disconnection of positive potential from line conductor Ll releases the armature H8 of line relay H5 to its mld-p0sition thereby deenergizing the half-nut magnet 36. The negative potential applied to line conductor L2 keeps the armature H9 of line relay I11 engaged with its spacing contact S.

Under these conditions all three circuits for energizing the holding magnet 2!!! are open thereby permitting the release of the armature 282. Thus the multi-contact switch 181 is restored to its normal unoperated position opening contact 19! to disconnect power from the transmitting apparatus. As soon as this switch is released a circuit is established from the A bus bar through the armature I19 and spacing contact S of relay ITI, through a contact 296 of the multicontact switch and the winding of relay 2E9 to the B bus bar. This relay is operated to close its contacts, one of which 381 lights a Thank you lamp 302. Also, by means of another contact 303 of relay 259 a connection is established from the A bus bar to one terminal of the multicontact switch magnet 29!, the other terminal of which is connected to the 3 bus bar. This results in the movement toward the right as viewed in the drawings of armature 292. In this case the hooked portion of this armature is moved under the armature I89 of the multi-contact switch thereby locking it in its unoperated position. This prevents the reoperation of this switch until the circuit has been restored to normal by the attendant at the recording station. This may be accomplished by removing the plug US from the line jack I92, thereby disconnecting all of the direct current control potentials from the line conductors L! and L2. At the transmitting station this results in the restoration of the armature I19 of line relay ill to its mid-position thereby releasing relay 299 to completely restore the transmitting apparatus to its normal idle condition.

The above described lockout feature whereby the multi-contact switch I8! is prevented from being operated is useful where other transmitting apparatus such as 354 is connected to the same two line conductors as the apparatus shown in detail. Each transmitting station is provided with a relay which corresponds to polar relay Ill which dru'ing the greater part of the operations has applied to it positive potential. Thus at the locked out stations the armature such as ['19 in engagement with its marking contact M connects the A bus bar to the multi-contact switch locking magnet 2:)! and thereby holds the armature 202 under the switch arm I89 preventing its operation. Also at the locked out stations the A bus bar is connected through a multi-contact switch contact 395 to the Line busy lamp 303, thus indicating that the line circuit is busy at another point. While negative potential is connected to the line conductor L2 the polar relays at the locked out stations corresponding to I'll have their armatures I79 operated to their spacing contacts S thereby operating relays corresponding to 299 in the manner described to maintain the locking magnet 29! energized.

If, after having moved the rotary switch 222 at the recording station to its No. 3 position to remove the copyholder containing the recorded subject matter, the attendant upon inspection of the recording finds it unsatisfactory, he may make an adjustment of the power level by means of the pad 211 and move the rotary switch back to its No. 2 position for recording and make another record.

However, it may be that the original message inscribed by the customer is unsatisfactory for making a good copy. In this case after removing the copyholder, the rotary switch 222 is moved from its No. 3 position to its No. 6 position. Ac-

cording to the foregoing description this places negative potential on line conductor L2 and positive potential on line conductor L1 which when received at the transmitting station results in the stripping of the message sheet from the transmitting cylinder. The recorder attendant then moves the rotary switch 222 through its No. '7 position to its No. 8 position. In passing through No. 7 position positive potential is ap plied to both line conductors L1 and L2. The reason for this operation is that with positive potential on line conductor L1 and negative potential on line conductor L2 to perform the sheet removal function, the line relay I 16 at the transmitter is operated to energize the half-nut magnet 36. So long as the auxiliary contacts controlled. by this magnet are operated, the multicontact switch 13'! remains operated after the sheet has been removed from the scanning cylinder. Thus when positive potential is again applied to line conductor L2 the line relay 111 also operates to maintain the operation of the multi-contact switch 13'! independently ofthe half-nut contact as described.

With the rotary switch 222 at the recorder in the No. 8 position positive potential is maintained on line conductor L2 thereby continuing the operation of the transmitter multi-contact switch and by means of the switch arm 226 relay 301 is operated to apply negative potential to line conductor L1 At the transmitter this condition results in the positioning of armature 118 of line relay 115 on its spacing contact S. A circuit is thus closed from the A bus bar through this spacing contact, through the drum contact 308, which is closed because the sheet 43 has been removed from the scanning cylinder, to one terminal of a Rewrite message lamp 309 which is illuminated since the other terminal is connected to the B bus bar. The connection of the A bus bar is continued from the lamp 309 to one terminal of the winding of a thermal unit 311 which becomes energized since the other terminal is connected to the B bus bar. The armature of this thermal unit is also connected to the A bus bar through the described circuit and after the lapse of a predetermined time closes a make contact 312 to energize the winding of a second thermal unit 313. The closure of contact 312 also completes a circuit through a break contact 314 of the second thermal unit 313 to the winding of relay 181, thereby operating this relay which immediately locks up through its make contact 182 in the manner previously described. The operation of this relay starts the operation of the motor 62 to supply the customer with another sheet of paper and a pencil. The adjustment of the thermal unit 313 is such that its contact 314 will open before the completion of the cycle of operation of the dispensing mechanism so that if the recorder attendant leaves the rotary switch 222 in in its No. 8 position for a longer time than is required to supply the customer with an additional sheet of paper and a pencil, the dispensing mechanism will be stopped in the manner described and will not be restarted.

The recorder attendant then moves the rotary switch 222 to its No. 9 position in which all direct current potentials are removed from the line conductors L1 and L2. This operation releases the transmitter apparatus in the manner described and completely restores it to its idle condition. The customer after rewriting the message as directed starts the transmitter apparatus from the beginning as described.

In Fig. 5 is shown a modified arrangement for returning to the customer his initially deposited coin instead of supplying him directly with a fresh sheet of paper and a pencil in case the ri inal m age is unsatisfactory for making a good recording. This apparatus comprises a coin chute 315 which is mounted on a pivot 316 adjacent its upper end. By means of this structure the lower end of the chute may be selectively positioned over either one of two

coin receivers

311 or 318. The latter is so constructed and located that it is accessible to the customer through a suitable opening formed in the housing 10 of the apparatus. Normally, the coin chute is held by means of a spring 319 over the receptacle 311. A solenoid 321 when energized operates a plunger 322.connected to the coin chute 315 to swing the lower end of the chute over the receptacle 318.

The chute is provided with facilities for holding one or more coins therein and for releasing them one at a time for deposit in either one of the coin receptacles. By such an arrangement several customers may procure paper and pencils for the preparation of their messages While the transmitting apparatus is in operation. The lower end of the chute 315 is normally closed by a movable member 323 which forms a part of a sort of escapement mechanism, another part of which is a plunger 324 normally held away from the coin chute but which may be inserted therein over the lowermost coin held in the chute. The escapement members 323 and 324 are linked to a plunger 325 which forms the movable core of a solenoid 326. When this solenoid is energized, the member 323 is withdrawn from its blocking position and the member 324 is inserted through suitable openings in the chute to prevent the downward movement of any other coins which may be resting in the chute 315. Thus, only the lowermost coin is released from the chute for deposit in one of the

coin receptacles

311 or 318.

The escapement mechanism and the operating solenoid therefor are mounted on a supporting member 321 which, in turn, is attached to the coin chute so that the chute and the escapement mechanism form a unitary structure. A pair of contacts 328 is provided to detect the passage of a coin through the chute to control the dispensing mechanism in a manner to be described. Another contact 329 is provided and is arranged to be operated when the coin chute 315 is moved over the return receptacle 3E8. Also, this mechanism is provided with a solenoid 331 to control a blocking plunger 332 to disable the coin chute when the supply of paper or pencils is exhausted.

The operating circuits for the modified coin handling apparatus may be incorporated in the circuits of Figs; 2 and 3 by disconnecting from terminals V, W, X and Y of Fig. 3 the apparatus shown to the right of these terminals and by connecting terminals U, V, W, X, Y and Z of Fig. 3 to corresponding terminals of Fig. 5. When the customer deposits the coin of predetermined denomination in the coin chute 315, the contact 328 is closed to complete a circuit extending from the A bus bar through the X terminal, through the coin control contact, through the W terminal through the winding of relay 181 and the contact B5, to the B bus bar. Thus, relay 181 is operated and looked as before to start a cycle of operation of the dispensing mechanism as described. The coin which is thus deposited is held in the chute 3l5 by the escapement member 323. After having secured a pencil and paper, the customer prepares his message and uses the key to operate the transmitting apparatus as described. While this apparatus is operating, another customer may deposit a coin in the chute 3|5 to secure a blank sheet and pencil for the preparation of his message.

Following the transmission and satisfactory recording of the customers message, the recording attendant operates the indicators I8 and collects the additional amount of money necessary, as described, and moves the rotary switch 222 at the recorder to its No. 10 position to illuminate the Thank you lamp 302. In this case, the connection of the A bus bar to the Thank you lamp 352 is also extended through terminal U to one terminal of the escapement solenoid 326 causing its operation, since the other terminal is connected through terminal Z to the B bus bar. Thus, the first customers coin is released into the receptacle 3H, while the coins of the other customers are held in the chute by the escapement mechanism. When the Thank you lamp is extinguished by the restoration of the circuit to its idle condition by the recording attendant, the solenoid 326 is also deenergized to permit another coin to be dropped to the bottom of the chute.

In the case where the recorder attendant finds it necessary to require the customer to rewrite his message, the rotary switch 222 is moved to its No. 8 position to illuminate the Rewrite message lamp 389 and to energize in sequence the thermal units 3!! and H3 as described. The closure of contact 312 of the thermal unit 3H connects the A bus bar through the break contact 314 of thermal unit 3&3 to the V terminal and thence through the winding of the solenoid 32E to the Z terminal and the B bus bar. The operation of the plunger 322 swings the lower end of the coin chute 3l5 over the return receptacle 3H3. Having reached this position the contact 329 is closed to connect the A bus bar through terminal X to the escapement solenoid 326 which thus is energized. The operation of the escapement mechanism releases the lowermost coin so that it is free to fall into the return receptacle 3l8, from which it may be retrieved by the customer. The opening of the break contact 314 of the thermal unit 3I3 as described releases the coin chute mechanism, restoring it to its normal condition as shown in the drawings. In this case the customer removes the coin from the return receptacle 3I8 and reinserts it in the coin chute M to procure another sheet of paper and a pencil by means of which he may rewrite his message.

The nature of the invention may be ascertained from the foregoing description of an illustrative embodiment thereof. The scope of the invention is set forth in the appended claims.

What is claimed is:

l. A facsimile system including a communication circuit, transmitting apparatus connected to said circuit for transmitting message signals over said circuit representative of the subject matter on a customers message blank, receiving apparatus connected to said circuit for recording said signals, customer operated means for conditioning said transmitting apparatus for transmitting the message on said blank over said circuit, a cost indicating mechanism at said transmitting apparatus, means controlled from said receiving apparatus for operating said mechanism to indicate to the customer the cost of said message, a normally closed coin slot, and means controlled from said receiving apparatus for opening said slot to receive a coin.

2. A facsimile system including a communication circuit, transmitting apparatus connected to said circuit for transmitting message signals over said circuit representative of the subject matter on a customers message blank, receiving apparatus connected to said circuit for recording said signals, customer operated means for conditioning said transmitting apparatus for transmitting the message on said blank over said circuit, a cost indicating mechanism at said transmitting apparatus, means controlled from said receiving apparatus for operating said mechanism to indicate to the customer the cost of said message, a normally closed coin slot, means controlled from said receiving apparatus for opening said slot to receive a coin, and means enabling an operator at the receiving apparatus to detect the deposit of'a coin in said slot.

3. In a facsimile system, a transmitting station and a receiving station interconnected for communication, scanning apparatus at said transmitting station, mechanism operable by coins of predetermined denomination and in predetermined number for making accessible to a customer an impression receiving medium of special configuration for the inscription thereon by the customer of subject matter to be transmitted, means including said subject matter bearing medium for operatively associating the same with said scanning mechanism for the transmission of signals representative of the subject matter to said receiving station, means operable after the completion of signal transmission for dissociating said subject matter bearing medium from said scanning apparatus, and means operable after said dissociation to make accessible to the customer another impression receiving medium for the reinscription thereon of subject matter at no additional cost to the customer.

4. In a facsimile system, a transmitting station and a receiving station interconnected for communication, scanning apparatus at said transmitting station, a coin controlled mechanism for delivering to a customer a sheet of special configuration for the inscription thereon by the customer of a message, means including said message bearing sheet for operatively associating the same with said scanning mechanism for the transmission of signals representative of said message to said receiving station, means operable after the completion of signal transmission for dissociating said message bearing sheet from said scanning apparatus, and means operable after said dissociation for delivering another sheet to the customer.

5. In a facsimile system, a transmitting station and a receiving station interconnected for communication, scanning apparatus at said transmitting station, mechanism operable by a coin of predetermined denomination for delivering to a customer a sheet of special configuration for the inscription thereon by the customer oi subject matter to be transmitted, means including said subject matter bearing sheet for operatively associating the same with said scanning mechanism for the transmission of signals representative of said subject matter to said receiving station, means operable after the completion of signal transmission for dissociating said subject matter bearing sheet from said scanning apparatus, and means operable after said dissociation for returning said coin to the customer.

6. In a facsimile system, a transmitting station and a receiving station interconnected for communication, scanning apparatus at said transmitting station, mechanism operable by a coin of predetermined denomination for delivering to a customer a sheet of special configuration for the inscription thereon by the customer of subject matter to be transmitted, means including said subject matter bearing sheet for operatively associating the same with said scanning mechanism for the transmission of signals representative of said subject matter to said receiving station, means operable after the completion of signal transmission for dissociating said subject matter bearing sheet from said scanning apparatus, and; means selectively operable after said dissociation either to accept said coin or to return the same to the customer,

7. In a facsimile system, a facsimile transmitter, a means for containing a normally inaccessible impression receiving medium having special characteristics, means for securing access to said medium by an operator for the application thereto of subject matter to be transmitted, and means controlled by the special characteristics of said subject matter bearing medium to initiate a scanning operation of said transmitter for the generation of signals representative of said subject matter.

8. In a facsimile system, a facsimile transmitter having a scanning mechanism, a magazine of blanks of a special character, means for delivering one of said blanks to a customer for the inscription of a message thereon by the customer, and means utilizing a special characteristic of said message inscribed blankfor initiating operation of said scanning mechanism for the generation of signals representative of said message. I

9. A facsimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby, and means for preventing unauthorized use of said transmitting apparatus comprising mechanism operative upon the insertion by a customer at said transmitting apparatus of a predetermined controlling object for delivering a message blank having a special controlling characteristic embodied therein to the customer for inscription thereon of subject matter to be transmitted, and means accessible to said customer and utilizing said special controlling characteristic of the blank for conditioning said transmitting apparatus for the transmission of the subject matter inscribed thereon to said receiving station.

10. A facsimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby, and means for preventing unauthorized use of said transmitting apparatus comprising a coin controlled mechanism operative upon the insertion by a customer at said transmitting apparatus of a coin of predetermined character for delivering a message blank having a special controlling charactertistic embodied therein to the customer for inscription thereon of subject matter to be transmitted'and means accessible to said customer and utilizing said special controlling characteristic of the blank for conditioning said transmitting apparatus for the transmission of the subject matter inscribed thereon to said receiving station.

11. A facsimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby and means for preventing unauthorized use of said transmitting apparatus comprising mechanism operative upon the insertion by a customer at said transmitting apparatus of a predetermined controlling object for delivering a controlling key to the customer, means accessible to said customer for inserting in the transmitting apparatus a message blank having inscribed thereon the subject matter to be transmitted, and means operable by said customer including mechanism controlled by said key for enabling the insertion ofsaid inscribed message blank and conditioning said transmitting apparatus for the transmission of the subject matter inscribed on the blank to said receiving station.

12. A facsimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby and means for preventing unauthorized use of said transmitting apparatus comprising means for containing a supply of message blanks each having a special controlling characteristic embodied therein, means including a motor for dispensing said blanks successively, mechanism operative uponthe insertion by a customer at said transmitting apparatus of'a predetermined controlling object for causing said means to deliver one of said blanks to the customer for inscription thereon of subject matter to be transmitted, and means accessible to said customer and utilizing said special controlling characteristic of the blank for conditioning said transmitting apparatus for the transmission of the subject matter inscribed thereon to said receiving station.

13. A facsimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby and means for preventing unauthorized use of said transmitting apparatus comprising means containing a supply of message blanks and a supply of pencils, mechanism operative upon the insertion by a customer at said transmitting apparatus of a predetermined controlling object for delivering a blank and a pencil to the customer for inscription on the blank of subject matter to be transmitted, and mechanism for receiving said pencil and said blank and including means responsive to the insertion of said pencil by the customer for conditioning said transmitting apparatus for the transmission of the subject matter inscribed on the blank to said receiving station.

14. A facsimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby and means for preventing unauthorized use of said transmitting apparatus comprising means for containing a supply of message blanks and a supply of pencils, mechanism operative upon the insertion by a customer at said transmitting apparatus of a predetermined controlling object for delivering a blank and a pencil to the customer for inscription on the blank of subject matter to be transmitted, and mechanism for receiving said pencil and said blank and including means responsive to the successive insertion of these articles by the customer for conditioning said transmitting apparatus for the transmission of the subject matter inscribed on the blank to said receiving station.

15. A facsimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message Signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby and means for preventing unauthorized use of said transmitting apparatus comprising mechanism operative upon the insertion of a predetermined controlling object for delivering a message blank having a special controlling characteristic embodied therein to the customer for inscription thereon of subject matter to be transmitted, means for receiving the inscribed blank and responsive to said special controlling characteristic of the blank When inserted by the customer for transmitting the subject matter inscribed thereon to said receiving station, a cost indicating display mechanism at said transmitting apparatus, means operable at the receiving apparatus for actuating aid cost indicating mechanism after said message has been received by the receiving station, and coin receiving means at the transmitting apparatus and means associated therewith for notifying the receiving station when coins in the amount of the cost displayed have been deposited by the customer.

16. A facsimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby and means for preventing unauthorized use of said transmitting apparatus comprising means for containing a supply of message blanks and a supply of pencils, mechanism operative upon the insertion by a customer at said transmitting apparatus of a predetermined controlling object for delivering a message blank and a pencil to the customer for inscription on the blank of subject matter to be transmitted, mechanism for receiving said pencil and mechanism including a normally closed chute for receiving the inscribed blank, means responsive to the insertion of said pencil by the customer for opening said chute to receive the inscribed blank, and means responsive to the successive insertion of these articles by the customer for conditioning said transmitting apparatus for the transmission of the subject matter inscribed on the blank to said receiving station.

17. A fascimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby and means for preventing unauthorized use of said transmitting apparatus comprising means for containing a supply of message blanks and a supply of pencils each having a key on one end thereof, mechanism operative upon the insertion by a customer at said transmitting apparatus of a predetermined controlling object for delivering a message blank and a pencil to the customer for inscription on the blank of subject matter to be transmitted, mechanism operable by the key on said pencil for initiating operation of the transmitting apparatus, mechanism for receiving said pencil and mechanism including a normally closed chute for receiving the inscribed blank, means responsive to the insertion of said pencil by the customer for opening said chute to receive a message blank, and means responsive to the successive insertion of these articles by the customer for conditioning said transmitting apparatus for the transmission of the subject matter inscribed on the blank to said receiving station.

18. A facsimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby and means for preventing unauthorized use of said transmitting apparatus comprising means for containing a supply of message blanks and a supply of pencils each having a key on one end thereof, mechanism operative upon the insertion by a customer at said transmitting apparatus of a predetermined controlling object for delivering a message blank and a pencil to the customer for inscription on the blank of subject matter to be transmitted, mechanism for receiving said pencil and mechanism including a normally closed chute for receiving the inscribed blank, mechanism operable by the key on said pencil for initiating operation of the transmitting apparatus including means for indicating to the customer When to deposit the pencil, means responsive to the insertion of said pencil by the customer for opening said chute to receive the message blank, and means responsive to the successive insertion of these articles by the customer for conditioning said transmitting apparatus for the transmission of the subject matter inscribed on the blank to said receiving station.

19. A facsimile system including transmitting apparatus having scanning mechanism for transmitting facsimile message signals, receiving apparatus responsive to said signals for recording the subject matter represented thereby and means for preventing unauthorized use of said transmitting apparatus comprising means for containing a supply of message blanks and a supply of pencils each having a key on one end thereof, mechanism operative upon the insertion by a customer at said transmitting apparatus of a predetermined controlling object for delivering a message blank and a pencil to the customer for inscription on the blank of subject matter to be transmitted, mechanism for receiving said pencil and mechanism including a normally closed chute for receiving the inscribed blank, mechanism operable by the key on said pencil for initiating operation of the transmitting apparatus including means for indicating to the customer when to deposit the pencil, means responsive to the insertion of said pencil by the customer for opening said chute to receive the message blank including means for indicating to the customer when to insert the message blank, and means responsive to the successive insertion of these articles by the customer for conditioning said transmitting apparatus for the transmission of the subject matter inscribed on the blank to said receiving station.

GARVICE H. RIDINGS.