Патент USA US2130336код для вставки
Sept. 20, 1938. |'=. BONN _ 2,130,336 RECORDING DEVICE FOR TELEPHONE‘ SETS Filed D80. 5, 1936 5 7535 513130 - M l I 76 2 Sheets-Sheet l Sept. 20, 1938. ' F.-BONN 2,130,336 RECORDING DEVICE FOR TELEPHONE SETS Filed Dec. 5, 1936 2 Sheets-Sheet 2 Patented Sept. 20, 1938 _ 2,130,336 UNITED ‘STATES PATENT OFFICE 2,130,336 . RECORDING DEVICE FOR TELEPHONE SETS Friedrich Bonn, Surth, near Cologne, Germany Application December 5, 1936, Serial No. 114,299 In Germany August 2, 1935 2 Claim. (01. 234-3335) This invention relates to a device which is in tended to be used in combination with auto before the dial has returned to normal and inde pendent matic telephone sets having impulse transmitters normal. of the power which returns the dial to of‘the dial type, for automatically'recording the It will be understood that in this case it is not 5 numbers or digits which have been set, by means necessaryto derive the power required for the of a mechanism which is mounted on the base‘ printing from the return-spring but the mo of the telephone set on top of the rotary ?nger mentum ofreturning masses in which previously dial and coupled with the dial. energy had been stored may be utilized for the The devices hitherto suggested for this purpose, 10 and having a recording device mounted beside or Theduration oi’ the individual telephone calls 10 beneath the set are not su?iciently reliable in may be recorded on the recording paper strip in commercial use and, so far as I have observed, a simple manner by causing the paper strip with partly require constructional changes in the tele the aid of a clock-work to move at a‘ constant;. phone sets and therefore do not meet the practical speed independently from the printing action past printing. 15 requirements. the following detailed description should be read in connection with the acco panying drawings ' inwhich operating the dial plate and very complicated Fig. 2 is a side elevation of the set shown in the type printing device within the rotary casing in a stationary position, covering the rotatable dial of the telephone set. Moreover, the printing Fig. 1; 30 tion. Hence the driving power of the spring mechanism which has to accelerate the whole ro tating unit and at the same time has to actuate ' has to be relatively great. of course, this is a disadvantage of the known apparatus. It is the object of the invention to obviate these drawbacks of the known recording devices. To this end, a numeral type wheel is connected to the shaft on which the additional dial is mount ed, in such manner that it participates in the 45 rotation of the shaft as the additional dial is wound up, while the numeral type wheel is locked by a mechanism when the dial starts turning back and is released by the mechanism for re turning into its normal position ,shortly before the dial has reached normal position and after the dialednumber or digit has been printed on the recording strip. . Hence, my new device has a stationary rather than a rotating casing and moreover it 'e?ects 55 the printing at a later instant, namely shortly 25 Fig. 3 is a longitudinal section of the record ing device on line 3-3 in Fig. 1; Fig. 4 shows, in larger scaleand in front ele vation, the printing device in its normal position; Fig. 5 shows the same front elevation,‘shortly 30 of the numbers which have been set has to be effected while the dial returns to its normal posi able masses which are rather considerable and 20 ing to the invention; constructional means are required for supporting furthermore for winding up the spring mechanism - Fig. 1 is a front elevation of a telephone set, having mounted on it a recording device accord much as the whole casing has to be turned when the printing device, must be rather considerable. Consequently the operating force which ‘in the $5 setting operation serves for accelerating the mov ' ‘ For a complete understanding of my invention However, this device is also unsatisfactory inas 25 ’ in use. been dialed is accommodated in a casing which is arranged co-axially to the dial of the telephone set. _ a recording stylus or pencil as long as the set is According to one known construction, the mechanism for recording the numbers which have 20 _ prior to the releasing of the printing device; Fig. 6 shows diagrammatically the arrange ment of the paper strip in the printing device, and the devicev for marking the duration of the calls; and _ _ 35 Fig. 7 shows the ribbon guides and the device for moving the ribbon. The recording device is enclosed in a casing 76 which may be fastened to the supporting plate 2 by any suitable means not shown in detail, since 40 such attaching means are immaterial so far as the present invention is concerned.- The plate 2 is attached to the telephone set by means of a clamping frame I which corresponds in its form to the shape of the base of the telephone set. 45 By means of a wall or partition 3 the casing 76 is divided into two superposed compartments A and B. Rotatably mounted in the partition 3 -is the center or main shaft l0 carrying at its in ward end a lever 9 o?'set away from wall 3 so 60 that by means of its projecting ?nger or stud H it engages the O-hole of the dial 8 of the tele phone set. The outwardly projecting end of the shaft l0 has ?xed to it the dial l2. Hence the two dials l2 and 8 are mechanically coupled with 65 2 9,180,888 one another. This dial I2 is under the in?uence \tion, a shifting mechanism is provided for the of a torsion spring l2‘ housed in the protruding driving roller 54. To this end bell crank it has central portion l2b of casing 18 and connected I pivotally mounted at the end of its arm“ a pawl between a fixed point 16' of casing .18 and shaft “3 58, which coacts with the ratchet teeth 6.0 pro N. This spring, while not absolutely necessary vided on the rim of the driving roller 54 and for the operation of the device (which could be moves these teeth 80 in a clockwise direction a operated alone by the telephone dial spring, not step su?icient so that the numerals of the dialed shown here), is advisable to use as an auxiliary, so as not to overload the telephone dial spring. Mounted on the shaft Hi, within the compart 10 ment B, is the control disc I! having a partially curved recess l4 and a release pin l5 (Fig. 4). The control disc i3 is shown in its normal posi tion and the straight edge of its recess l4 engages the projecting portion ll of the bell crank it which is pivotally mounted at Ma and acted upon by the spring I817. The free end I! of bell crank 20 25 30 35 l8 swings in the path of movement of the arm 2| of a release lever 20 pivotally mounted at 20' and under the in?uence of a spring 20'’. Another branch '22 of the lever 20 lies in the path of movement of the pin l5. Secured to bell crank ii at 23 is the printing member or type lever 24 having-a little hammer 25 of rubber placed oppo sitely to a number type wheel 26 presenting the numerals l, 2, 3, etc. In one rotational direc tion the number type roller 26 is positively cou pled with the dial-carrying shaft l0 and thus with the dial H, by means of the gears 28, 29 and 30 while in the opposite rotational direction. a resilient coupling such as torsion spring .25" is interposed between the ‘toothed wheel 20 and the numeral type wheel 25 thus permitting the dial i2 to return to normal although the numeral type wheel 26 is prevented from rotating. To this end a locking mechanism is provided con sisting of a ratchet wheel 3| having ratchet teeth 32 and being rigidly connected to the number type wheel 26. and a pawl 33 which is pivotally mount 40 ed on the lever 25. Under the action of the ten sion spring 35, one end of which is fast to the arm 2! of the lever 20 and the other end of which is fast to the pawl 38, the pawl 33 having at its free end a tooth 31 adapted for engagement with 45 the ratchet wheel 3| is held against a stop 38 of lever 25. Rotatably mounted on the stud 4? is the paper drum 46. Under the action of the driving roller 54 having a roughened or toothed surface fric 50 tionally engaging the paper strip, the strip 58 is unwound from the roller lit), thence it runs over the guiding members 49, 50, 5!, 52, 53 and is call number are typed with the proper ‘spacing in a successive order on the paper strip so as to be p 10 easily readable (Figs. 4 and 5). The paper strip 48 is besides continuously moved for the duration of a call, in order to record the duration of the call by means of a clock-work of any suitable conventional construc tion (not shown) which is accommodated in the compartment A. This clockwork may be of any well known type and therefore is not speci?cally illustrated in the drawings. The clock-work drives the driving roller 54 so as to wind up the paper strip on the winding roller 55. The paper 20 feed or drive by means of this clock-work is au tomatically started when the subscriber lifts the receiver-from its forked cradle 'Il through the medium of the arm 18 fastened to the cradle and engaging, with its forked end 19 the pivoted 25 lever 42 which in turn, with its pin 6i may engage any suitable element of the clock-work by which it is arrested when the receiver is hung up while it is released when lifting the receiver. These auxiliary features are not shown in the drawings 30 since they are immaterial for the present inven tion and its understanding. , The mechanism for recording on the paper strip the start and end of a call consists of a lever 38 (Fig. 6) pivoted at 39 and held against the pin 35 H of the lever 42, under the action of the spring All. The lever 42 is connected with the cradle 11, in the manner described above. When the re ceiver is hung up, the lever 42 is so positioned that the pin iii is in a position above the nose 43 40 of the lever 38. When the receiver is lifted, the lever 132 moves into- the position indicated in dotted lines in Fig. 6, i. e., beneath the nose 43. By this movement the pin tl presses against the nose 53 and causes the lever 38 to swing in coun 45 ter-ciockwise direction and to engage the angle piece (it which is disposed underneath the type roller 25 the free end of the angle piece extend ing underneath and parallel to paper strip 48. The corresponding portion of the type roller 26 50 has been out off in the drawings to show the angle piece M. In the free portion of the angle wound up on the winding drum 55. The winding ‘ piece M is a small hole or recess (not shown) en~ gaged by the pin 55 when it is actuated. The drum 55 is mounted on the plate 55 which is slid paper strip GE! passes between the angle piece 44 55 able in the direction indicated by the arrow and 55 acted upon by a spring 56n in such manner that and the pin 135, and each time the receiver is lifted drum 55 is resiliently held against the driven ' and hung up and the lever 62 swings in counter roller 54 and paper strip 48 lying on it, thus the clockwise direction, the pin 45 makes a small hole paper strip 48 is prevented from slipping on the or depression in the paper strip. It will be un derstood that a writing pen or- pencil may also 60 60 roller 54 and at the same time the roller 55 is be used instead of the pin 45. a driven in the winding direction. It will be under The endless typewriter ribbon 52 (Fig. 7) runs stood that the roller 55 including its slidable over the ribbon roller 63. the guides 54, 65, 56 and direction of the arrow, for accommodating the 51 and round the type wheel 26. By the resilient member 68 connected with the guide 61 the rib 65 65 distance between the centers of the rollers 54 and bon 52 is held under slight tension. It will be 55 to the amount of paper wound up on the roller 55. Furthermore, by means of the upwardly bent understood that any other suitable means may be free end 51 of the plate 55 it is possible to move used for feeding the printing-ink to the type the roller 55 back from the driving roller 54 as wheel such as an ink roller. The ribbon 62 is moved by means of the pawl 70 70 indicated by the arrow in order to render it possi- - 59 pivoted under spring action on the lever 10. ‘ ble to take the roller 55 with the paper reel off The lever 10 with its free end ‘ll engages the re ‘ from the plate 55 (Fig. 6). In order that the printed numerals of thecall cess or notch of the disc 12 ?xed on the dial‘ number or digit may be typed with the proper carrying shaft l0. Now, when the disc 12 is 75 75 spacing on the paper strip in the dialing opera } turned in the direction of the arrow in the mounting plate 55 is gradually displaced in the _ engages the teeth ‘M oi’ the ribbon. roller 68 and moves the roller 63 including the ribbon 62. In order to render it possible to make any ad= ditional notes by hand on the portion of the paper strip carrying the respective recorded call number, an aperture ‘I5 is provided in the top wall portion of the casing, ‘above the paper guide ii. '10 3 9,180,386 setting operation, the free end ‘Ii of the lever it which is pivoted at 12 is lifted. the pawl 89 The operation of the device is as follows: . In the normal position the parts of the mech anism are in the position shown in Fig. 4. Now, when lifting the receiver, the lever 42- moves from the position shown in full lines in Fig. 4 into the 15 position shown in dotted lines, whereby the clock work for the paper feeding mechanism is released by means of the pin 8! and permitted to operate.v Simultaneously the lever 38 is swung and pro duces a perforation on the paper strip 48. The setting of the numbers is now effected by 20 means of the supplemental ?nger hold dial i2 operated in the conventional manner to operate the conventional dial 8. The rotary movement of the dial i2 is transferred to the dial 8 of the 25 telephone set by the dial-carrying shaft l6 and the lever 9. By the train of gears 28, 29, 30 the type wheel 25 is rotated accordingly in the di rection indicated by the arrow in Fig. 4 so that the number or digit of the type wheel 26 corre 30 sponding with the dialed character stands oppo site to the hammer 25 when each single dialing operation is ?nished. In the dialing operation the disc I3 is turned in the direction indicated by the arrow in Fig. 4. 35 The projection ll of the lever l6 thereby slides along on the incline of the recess N and the le ver I6 is lifted on its fulcrum_l6a into the po-_ sition Fig. 5, thus tensioning the helical spring No. The pawl 59 thereby rotates the paper driv 40 ing roller 54 through a predetermined angle. Due to the rotary'movement of the disc IS the pin i5 disengages the lever 20 so that the latter is swlmg round its fulcrum 20a under the in '?uence of spring 20b in a clockwise direction and 45 thereby its free end 2! is moved into the return path of hell crank arm l9 as shown in Fig. 5. Simultaneously the pawl 33 is also swung clock wise and its locking tooth 31 engages the ratchet teeth 32 of. the wheel 3| and thereby prevents 50 this wheel from rotating clockwise. ‘Now, when- the ?nger of the operator disen gages the dial l2, it returns to normal in the usual manner under the action ‘of spring l2“. The parts It, 20, 33’ andthe type wheel 26 on 55 the other hand are kept in their displaced posi tion shown in Fig. 5, up to a predetermined instant shortly before the dial l2 has reached normal and when disc i3 is about to arrive, clockwise turning, in the position shown in Fig. 4. At this instant, 60 which is shown in Fig. 5, the pin l5 contacts the lever arm 22 and lifts it into the position Fig. 4, thus releasing arm IQ of bell crank l6 and allow ing its detent II to snap into cam recess ll un der the action of the spring liib. The hammer 25 is thereby impelled against the type lying in front of it and the respective type is printed on the paper strip 48 by the medium of the rib bon 62. When this operation is ?nished, lever 22 rises slightly higher so that, as shown in Fig. 70 4, pawl 31 becomes disengaged from ratchet wheel 3| and the latter together with type wheel 65 26 return to normal under the action of the coupling or torsion spring 26“. I so that the numbers or digits are successively typed or printed on the paper strip. When the receiver is hung up, the ‘lever 42 is moved‘ back into its normal position and acts again upon the lever 38 which in consequence thereof again 5 presses or prints a mark into or onto the paper strip. Simultaneously the spring-actuated mem ber 6i locks the clock-work so that the movement of the paper strip 48 is stopped. From the two marks made on the paper strip 48 by the lever 10 38 the duration of the call may be computed corresponding to the speed of the paper strip, while the printed number indicates the subscriber with whom the call was made. The incoming calls are also recorded, at least as to their dura 15 tion, as the lever 88 is operated each time the receiver is lifted or hung up. False recording or falsi?cations are prevented because the real ' printing is e?'ected only shortly before the dial returns to normal. For the same reason, the power required for the printing action is mate rially reduced. It will be understood that various modifications 20' in the constructional form of my device can be made in accordance with the diiferent shapes 25 of telephone sets, without departing from the scope of my invention. Having now described my invention, what I claim is: I. In a call recording device directly attach able to automatic telephone sets, a stationary casing containing the recording device and,at tachable to the selector base of the telephone to cover its conventional selector disc, said record ing device having an operating shaft and a vis 35 ible recorder selector disc mounted thereon and having call characters similar to those arranged on the conventional disc, means for coupling said recorder selector disc with the telephone selector disc, a type wheel carrying call numeral units corresponding to those on said selector discs, gearing between said type wheel and said shaft to positively rotate said type wheel into dialing position the same relative extent as the selector discs when the latter are moved into a dialing position, means for arresting said type wheel in dialed position to permit the latter to return alone to normal position and means .tending to return the type wheel to normal position, a cam ,ele ment on said shaft for controlling said arresting means to arrest the type wheel'and hold it in arrested position while the selector discs return to normal position and to release the type wheel shortly before the discs have arrived in normal position, a printing hammer cooperating with said 55 type wheel to print the dialed character, and means, controlled by said arresting means, for releasing said printing hammer shortly before said type wheel is released to return to normal position. - 2. In a call recording device directly attachable to automatic telephone sets, a stationary casing containing the recording device and attachable to the selector base of the telephone to cover its conventional selector‘ disc, said recording device having an operating shaft and a visible recorder selector disc mounted thereon and having call characters similar to those arranged on the con ventional disc, means for coupling said recorder selector disc with the telephone selector disc, a. 70 type wheel carrying call numeral units corre sponding to those on said selector discs, gearing between said type wheel and said shaft to posi The same cycle or sequence of operations will tively rotate said type wheel into dialing position 75 be repeated with every single dialing operation the same relative extent as the selector discs when 76 4 s,1so,sse the latter are moved into a dialing position, means for arresting said type wheel in dialed posi tion to permit the latter- to return alone to normal position but tending to return the type wheel to normal position, a cam element on said shaft for controlling said arresting means to arrest the type wheel and hold it in arrested position while the selector discs return to normal position and to release the type wheel shortly before the discs have arrived in normal position, a spring oper ated printing hammer arranged in cooperative relation with said type wheel, a second cam de vice on said shaft for moving said printing ham mer into operative position ready for printing when said discs are moved into a selecting posi tion, means controlled by said type wheel arrest ing means for arresting said printing hammer in said operative position while said dials return to normal position and for releasing said hammer i'or actuation against the type wheel shortly be fore said type wheel is released to return to nor mal position. 10 FRIEDRICH BONN.