US1811131A

US1811131A - Selective system and apparatus

Info

Publication number: US1811131A
Application number: US704022A
Authority: US
Inventors: Edward E Kleinschmidt
Original assignee: Teletype Corp
Current assignee: AT&T Teletype Corp
Priority date: 1924-04-03
Filing date: 1924-04-03
Publication date: 1931-06-23
Anticipated expiration: 1948-06-23

Description

June 23, 1931.

Filed April 5, 1924 4 Sheets-Sheet zjvwcwhw wzwmzw WM QM June 23, 1931. E. E. KLEINSCHMIDT 1,811,131

SELECTIVE SYSTEM AND APPARATUS Filed April 5, 1924 4 Sheets-Sheet 2 QNo: un

J1me 1931- E. E. KLEINSCHMIDT 3 SELECTIVE SYSTEM AND APPARATUS Filed April 3, 1924 4 Sheets-Sheet 3 J1me 1931- E. E. KLEINSCHMIDT ,81

SELECTIVE SYSTEM AND APPARATUS Filed April 3, 1924 4 Sheets-Sheet 4 ammo; W {W Patented June 23, 1931 UNITED STATES PATENT OFFICE EDWARD E. KLEINSCHMIDT, OF LONG ISLAND CITY, NEW YODK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO TELETYPE CORPORATION, OF CHICAGO, ILLINOI, A CORPORA- TION OF DELAWARE SELECTIVE SYSTEM AND APPARATUS Application filed April 3, 1924. Serial No. 704,022.

The present invention relates to improve- 1o tions of electrical conditions controls the entire selective operation of the mechanism. Mechanisms of the class such as the Baudot, Potts, and teletype selectors have been based upon the principle of setting into operation rotary members which during each signal cycle operate or cause operation of members successively or in order, and produce the selective operation due to an interference with or modification of the movement of the suc- 2o cessively actuated members in response to the received impulses. The successive operation of members requires complicated mechanisms, of larger size than has been found necessary in the improved selector hereinafter set forth, and are subjected to continual shock due to' the successively operating parts and the stopping and starting of the greater masses necessarily used as compared with my present improved selector, which eliminates entirely the successive operations and interfering or restraining actions. The present improved selector is fundamentally different from the interfering mechanical action selectors, and is designated hereinafter I as a non-interfering mechanical action selector to distinguish the difference in type.

An object of the present invention is to provide a non-interfering mechanical action selector, more simplified, lighter in weight, more durable, more reliable, and more efficient than any selector heretofore produced. A form of this improved mechanism is disclosed in copending application, Serial Number 649,562, filed July 5, 1923, matured into Patent No. 1,567,392, granted Dec. 29, 1925, of which the present application is a continuation in part. In applicants Patent 1,703,152, granted February 26, 1929, a system utilizing receivers of the type disclosed in the present case is shown. The claims in said patent, however, are directed to the system, and the specific synchronizing arrangement disclosed therein.

In mechanical start-stop selectors, it is the practice to operate the receivers at a faster rate than the transmitters in order to insure stoppage ofthe receiver rotary member at the end of each rotation. When the controlling code combinations of conditions or impulses making up the signal are uniform in length, diificulty is experienced in proper operation of the stop device, particularly at high speeds. This difficulty is due to the fact that the greater speed of operation of the receiver reduces the time interval in which the receiving magnet and stop devices controlled thereby must act in comparison with the time interval allotted for the operation of the selector members, and the time for the operation of the stop mechanismsbecomes considerably shorter than the time interval of a selecting impulse. This short time for the stop functioning impairs the efliciency of the system as a whole to a considerable extent. This defect is obviated wholly by stopping or synchronizing the rotary receiver memher at the end of the last selecting impulse in a manner to compel and insure proper stopping at the end of the cycle as hereinafter so set forth, and by applying my improvements to start-stop mechanical selectors of either 'the interfering or non-interfering type, a

marked increase in operating efficiency and margins is attained.

A further object of the invention is to provide new and improved methods of eifecting substantial concordance of action between transmitter and receiver members whereby the speed diiferences between-the transmitter and receiver members may be increased, and the operating margins, speed and efliciency of the system as a whole are increased.

Another object of the invention is to provide an improved gap adjusting arrangement for magnets, particularly useful to effect selector magnet adjustments.

Still other objects of the invention are such' as may be attained by a utilization ofvarious W} combinations, subcombinations and principles hereinafter set forth.

Referring to the drawings- Fig. 1 is a plan view of a form of the receiving mechanism. partially in section, and with parts broken away.

Fig. 2 is a front elevation of the selecting mechanism.

Fig. 3 is a section taken along line A A of Fig. 1.

Fig. 4 is a sectional view taken along line BB of Fig. 2.

Figs. 5 and 6 are detail views showing the selector overlap operation.

Fig. 7 is a side view showing the selecto in its relation to a printing telegraph machine.

Fig. 8 is a plan view showin the selector bar restoring mechanism, and t e selector in relation toa printing telegraph.

Figs. 9, 10 and 11 show printer clutch and selector bar restoring details.

Figs. 12 to 17 inclusive are fragmental detail views showing the application of the new system of stop control as applied to the noninterfering mechanical selector shown in Figs. 1 to 11.

Figs. 18, 19 and 20 are fragmental views showing the new system of stop control as applied to a form of interferlng mechanical selector.

The selector mechanism is mounted on a base 1 (Figs. 1 to 8) which is secured to the side plates 2 (Fig. 8) by means of studs or cap screws fastened in tapped holes 3, or in any other convenient manner. Base 1 will then act as a front tie and supporting frame member to carry the mechanism. Secured to base 1 (Figs. 2 and 12) by means of screws 4 is a selector supporting structure 5. Seated on an extension 6 of structure 5, and secured thereto by screws or in any other suitable manner, 1s a selector magnet core 7 upon which are coils 8. An armature 9 for the selector magnet is pivoted at 10 and rigidly secured to armature 9 is an armature extension 11. An adjustable back stop screw 12 is provided in extension 6 for limiting the movement of armature 9. A spring 12 with an adjusting screw 13 is provided to give armature 9 with extension 11, a normal bias against stop 12 when coils 8 are de-energlzed. An adjustable stop screw 14 is provided to limit the motion of extension 11 when coils 8 are energized. A cam shaft 15 (Figs. 1 and 12) at one end has a reduced extension 16, rotatably and slidably journaled in support 5, and at the other end has a reduced extension 17, rotatably and slidably journaled in a shaft 18. Shaft 18 has rigidly secured thereto and rotatable therewith, a cam member 19 and projecting therefrom is a shelf 20 in which is cut a slot 21 which ma be at an angle, as shown in Fig. 2, or straight as shown in Fig. 13. A pin 22 (Figs. 3 and 12) set into cam shaft 15 acts as a drive connection between

shafts

15 and 18. A spring 23 (Figs. 1 and 12) interposed between 19 and the pin 22 forces shaft 15 and extension 16 to the left in Fig. 1 against armature extension 11. Slot 21 may be cut at an angle in shelf 20'so that, as 18 is rotated a slight end thrust will be exerted to assist sprin 23 in moving the pin barrel to the left in ig. 1. Shaft 18 is secured to a member 24 (Figs. 2 and 12) of a friction clutch. Member 24 is constantly in frictional engagement with springs 25' (Figs. 2, 3 and 12) fastened to a clutch member 25 which in turn is secured to a shaft 26. Shaft 26 is supported from base 1 by means of thrust bearing 27, and is driven continuously while the printer is o rating by means of helical gears 27 an 28 from shaft 29. Provision is made in bearing 27 to take up the thrust due to the fact that shafts 26 and 29.0perate at right angles to each other. It will be understood that this drive may be effected with bevel gears if so desired.

A stop member 30 (Figs. 1, 2 and 4) provided with a notch 31 (Fig. 1) is carried by an orienting member 32 which is rotatably mounted on extension 16 and frictionall held against 5 by a clamping member 32 (F ig. 4) in a manner to permit its adjustment about shaft extension 16 as a center. An orienting arm 33 is provided for adjusting the relative position of stop member 31 which is frictionally held in the position where set durin operation. A stop pin 34 fastened in sha 15 is normally held against stop member 30 as shown in ig. 1 when magnet armature 9 is attracted and shaft 15 is in zero position.

Pivoted to support 5 on extension 35 and spaced apart by members 36 are five selector bar control fingers 37 to 41. The relative positions of fin ers 38 to 41 has been indicated in Fig. 4. spring 42 individual to each control finger supported from member 43 (Figs. 2 and 4) tends to force the control fingers to the left in Fig. 4. Coacting with and individual to the control fingers 37 to 41 respectively, are five control finger latches 44 to 48 spaced apart, as shown in Fig. 1 and pivotally supported from 5 by extension member 49. Latches 44 to 48 normally tend to move toward shaft 15 under the influence of springs 50 individual to each of said to 48 to hold fingers 37 to 41 in actuated position.

Five control finger actuating cams 54 to 58 are secured to shaft 15 in a manner to coact with cam surfaces 52 on fingers 37 to 41 respectively in timed relation with the recepfor each of the first six intervals and for the seventh or stop interval it rotates 30 degrees, coming to rest before the seventh or stop signal has been completely received. In this manner the time in which the receiver cam shaft is rotating through the stop interval plus the time in which it is stopped at the end of each signal period is just equal to the time period 0 one signal interval. Accordingly cam 54 is so located as to rotate past the cam surface 52 on fin er 37 at substantially the central portion of the second si nal interval, the first signal interval being t e start period. With the position of 54 fixed in this manner, the remaining cams 55 to 58 are spaced at angular distances of 55 degrees around the cam shaft. Cams 54 to 58 are axially spaced along the shaft so that when the selector magnet is energized, the cams 54 to 58 will be in line with fingers 37 to 41 and when the selector magnet is de-energized they will pass between the fingers 37 to 41 as the cam shaft rotates. For reasons that will appear hereinafter, stop pin 34 and cam 55 are placed in line as shown in Fig. 2. It will be apparent that when the selector magnet is de-energized with the cam shaft at rest, the cam shaft will move to the left in Fig. 1, permitting pin 34 to pass through notch 31, and the cam shaft will then be rotated by the operation of shaft 26 and the friction clutch. As the various cams 54 to 58 rotate past their respective cams 52, the fingers 37 to 41 respectively will be operated or unaffected, depending on whether the selector magnet is energized or de-energized. When any of the fingers 37 to 41 are actuated by the respective cams 54 to 58 being brought into alignment with cams 52 at the proper time, the corresponding ones of the latches 44 to 48 ride over shoulders 53 on the actuated fingers and lock these fingers in actuated position. It will be noted that latches 44 to 48 are wide enough to be actuated by the pin 34, and cams 55 to 58 respectively in either position of the cam shaft, and accordingly as the cam shaft rotates, these latches are actuated to release the set selector bar control fingers, and restore the latches, permitting restoration of the actuated ones of the fingers 37 to 41. Latches 45 to 48 are restored successively and by the same cams which set fingers 38 to 41 respectively. Be-

relation of latches 44 to 48 and control fingers 54 to 58 is such that latches 44and 45 are restored during the start interval of the signalperiod, and finger 37 is therefore restored to unactuated position just in time to be reset in event that a marking condition is received and the selector magnet is energized durin the second interval. Finger 38 is restored simultaneously with finger 37, during the first or st-art interval; finger 39 is restored during the second interval in which 37 is actuated, fin er 40 is-restored during the third interval an finger 41 is restored during the fourth interval in which finger 39 is actuated, during the fifth and

sixth intervals fingers

40 and 41 are actuated, and during the seventh interval, the entire selection is stored on the control fingers and transferred in a manner hereinafter described, to the selector bars. After this transfer to the selector bars, another selection may be immediately set up on the control fingers.

It will be apparent that an overlap is provided in the selector control fingers whereby a new selection is partially set up before the preceding selection is entirely cleared out, and the work of restoration is spread out over a greater portion of the signal period. The amount of power necessary to restore the selector is considerably lessened and permits a substantial reduction in size and mass of parts, in the size of the clutch, and in the I shock and wear on the parts due to restoration. The selector mechanism so far described, performs all the functions of the heretofore common independent rotary switching distributor, selecting magnets, and overlap mechanism.

Five notched selector bars- 59 to- 63 are mounted in brackets 64 secured to base plate 1, in a manner to permit longitudinal sliding movement thereof. Bars 59 to 63 are under the influence of five springs 65 mounted on a block 66 so as to be simultaneously adjust-' able in tension by means of screws 67. Springs 65 are held in position against the respective selector bars 59 to 63 by means of a guide plate 68, and normally tends to force the respective bars to the right in Figs. 1 and 2. Each of the selector bars 59 to 63 has cut in its lower edge two notches 69 and 70 in a manner to form a lug 71. (See Fig. 2.) As shown in Figs. 1 to 4, the selector bars and the lugs 71 thereon are so arranged with respect to control fingers 37 to-41 that control finger 37 engages lug 71 on bar 59 to hold this bar to the left in Figs. 1 and 2, against the tension of its respective spring 65; and in like manner, fingers 38 to-41 respectively engage the remaining lugs 71 to hold bars 60 to 62 to the left in Figs. 1 and 2. It will be understood that the notches 69 and 70, and therefore the lugs 71 are relatively displaced on each selector bar to accommodate the spacing of control fingers 37 to 41. The notches are provided to permit a free and relatively wide movement of each finger 37 to 41 under 'the influence of cams 54 to 58 respectively,

without interference by the relatively closed spaced selector bars. The relatively wide movement of these fingers is essential in providing for an overlap so that a selection may remain set up on the selector bars while a succeeding selectionis set up on the fingers '37 to 41. This overlap arrangement is an important feature of the present invention because of its simplicity,'and is attained in the following manner.

Lugs 71 on the selector bars are made of sufiicient width, so that, when the selected ones of bars 59 to 63 have been released by fingers 37 to 41 and are moved to actuated position shown in Fig. by springs 65, as will be hereinafter described, and the latches 44 to 48 are actuated to release the set ones of fingers 37 to 41, these actuated or set fingers will abut the lugs 71 as shown in Fig. 6 of the respective actuated selector bars, and will restore only partially. Shoulders 53 on fingers 37 to 41 are so placed, however, that this partial restoration is sufficient to move the shoulders 53 past the lower edges of latches 44 to 48 and the latches will abut surfaces 7 2 (Fig. 6) of the fingers 37 to 41. At

this stage, the respective latches 44 to 48 are tive combination will remain in engagement with surfaces 72, and accordingly, when the selector bars 59 to 63 are moved to the left in Figs. 1 and 2, as will be hereinafter explained, to take up the succeeding selection, these fingers will completely restore and lock the unselected bars to the left in Figs. 1 and2.

After the sixth signal interval has been completed and the selection has been completely set on fingers 37 to 41, cam member 19 (Fig. 3) actuates a control member 73. Control member 73 is pivoted at 74 to an extension of supporting structure 5 and is held against cam 19 by the action of a spring 75. During the first six intervals of a signal period, control member 73 is maintained in a position to act as a stop aganst which a bell crank lever 76 is held. Bell crank 76 is secured to selector bar restoring and control member 77 by means of a screw 78 or in any convenient manner, to form a rigid unitary structure. Members 76 and 77 are secured to and rotatable with spindle 79 by means of a. split clamping arrangement 80 on member 7 7. When any of the selector bars 59 to 63 are released by actuation of the respective fingers 37 to 41 as above described, springs 65 force the released bars to the right against member 77. Until after the sixth signal interval, stop 73 holds member 77 and the released bars frommoving under the influence of springs 65. During the seventh signal interval, cam 19 trips control member 73 and permits members 76 and'77 to rotate clockwise as viewed in Fig. 2 under the stress exerted by springs 65 of the selected bars 59 to 63, the end of 76 being moved to the position shown in Fig. 3 with relation to member 73.

In this manner during the seventh interval, the selector bars take the selected positions as determined by the positions of the fingers 37 to41, and restoration of the actuated fingers is immediately thereafter commenced in the first or start interval of the succeeding signal period. As will appear hereinafter, the movement of spindle 79 trips a clutch mechanism shown in Figs. 9 and 10 which starts into operation, the printing mechanism. The printing of a character is then efiectedwhile the succeeding combination is being set up on the selector control fingers 37 to 41 and while the selection for the operation being carried out by the printing mechanism is being cleared off the fingers 37 to 41. After the selective operation has been completed by the printing mechanism, a cam action restores the selector'bars gradually by rocking spindle 79 to move member 77 and thereby restores selector bars 59 to 63 to the left in Fig. 2, and places them in position just in time to take up the succeeding selection from fingers 37 to 41. If it is desired to operate the selecting magnet by reverse current impulses instead of make and break impulses a polarized line relay may be used to operate the selector magnet.-

Ulutch details and selector bar restoration Referring to Figures 1, 7 and 8, spindle 79 extends through and is journalled in selector base plate 1, and at the other end is journalled in a bearing 81 supported by a bracket 82 suitably secured by screws 83 (Fig. 8) to the rear of selector base plate 1. Rigidly secured to spindle 7 9 and rotatable therewith is a rocker arm 84 (Figs. 9 and 10). Secured to one side of rocker arm 84 is a selector bar restoring extension 85, carrying a roller 86. Secured to the other side of rocker 84 is a clutch release and clutch stop extension 87. Loosely mounted on shaft 29 is a sleeve member 88 with an integral extension 89 (Fig. 11) Formed integrally with sleeve 88 is a selector bar restoring cam 90 and a printer operating cam 91. Slidably mounted on sleeve extension 89 is a serrated clutch member 92 (Figs. 8 and 11) provided with a disengaging and'stop projection 93 (Figs. 9, 10 and 11) Two notches 94 are cut into clutch member 92 (Figs. 10 and 11), and projecting teeth 95 integral with sleeve 88 are fitted into notches 94 in a manner to permit an axial sliding movement of 92 on 89, but at the same time effecting a driving connection between sleeve 88 and clutch member 92, so that when 92 is rotated it will drive 88 together with

cams

90 and 91. A coil spring- 96 is placed around clutch member 92 and rests at one end against a shoulder on 92 and at the other end on a washer or disc 97. A friction collar 98 (Fig. 11) is fastened by a set screw to shaft 29 and prevents movement of sleeve 88 to the left in Fig. 1. Interposed between 98 and 88 is a friction drive disc 98 against which the end surface of 88 is pressed. A toothed clutch member 99 is secured to shaft 29 by a set screw 100 (Figs. 7, 8 and 11). \Vith the printer mechanism at rest in zero position as shown in the drawings, stop 93 is held against stop member 87 by s ring 96, in a manner to maintain

clutch mem ers

92 and 99 disengaged, and at the same time is held against shoulder 101 (Figs. 9 and 10) of member 87 in a manner to prevent rotation of sleeve 88 with shaft 29. The pressure exerted by spring 96 on sleeve 88 through disc 97 forces sleeve 88 against collar 98 causing sufficient friction between the continuously rotating collar 98 and sleeve 88, to insure stop I 93 being brought positively to a position of rest against shoulder 101 without the necessity of providing a lock to bring sleeve 88 to a zero position. Shaft 29 is supported from and journalled in selector base 1, at one end and from side frame 2 by means of bearing (not shown) at the other end.

Shafts 29 and are fixed in such relation and so timed, that cam 90 comes to the posi tion shown in Fig. 9 just before, or as cam 19 (Fig. 3) actuates member 73 to permit members 76 and 77 to be actuated by the movement of the selected ones of the selector bars. As the bars move to selected position,

members

85 and 87 are moved downwardly in Fig. 9 by the rocking movement imparted to spindle 79. The downward movement of 87, releases clutch member 92 for axial movement and rotation. Clutch member 92'is then forced into engagement with clutch member 99, and sleeve 88 together with

cams

90 and 91 are rotated with shaft 29. As before pointed out, cam 19 functions in the seventh signal interval after a selection has been completely set up on the selector control fingers 37 to 41, and the reception of the succeeding signal thenimmediately proceeds. 'Cam 90 operates on roller 86 (Fig. 9) to raise rocker arm 34 just before the seventh interval of the succeeding selective combination and positions stop member 87 so that 93 will again engage member 87 sleeve 88 to rest in zero position. As sleeve 88 approaches zero position, stop projection 93 rides up on a cam surface 106 (Figs. 9 and 10) supported from side frame 2 by a bracket 107. As shown in Fig. 10 this cam surface is so shaped as to force stop projection 93 into its disengaged zero position against 87 and 101. As spindle 79 is rotated in a counter clockwise direction in Figs. 2 and 9 by rocker 84, member 76 is moved to permit control member 73 to rotate under the influence of spring 75 (Fig. 3) and the selector bars are restored to the left in Fig. 2 by member 77. This mechanism is then locked by members 73 and 76, just in time to be released for the succeeding selection which in the meantime has been completely set up on control fingers 37 to 41. The shape of cam 90 is such as to cause restoration of the selector bars to commence towards the end of its complete revolution. In this manner the operations to be performed in response to the selective set up of the selector bars is materially increased, and the operations of the printing mechanism may be accordingly reduced in speed. Substantially a full signal period may be utilized in this manner for effecting a printing stroke and a return stroke of a selected type bar. This is an important feature of the invention.

As is well understood, the various combinations of selector bar positions bring into alignment difiering series of selector bar notches. A series of actuating bars 108 (Figs. 7 and 8) extending through guide plate 109 (Figs. 2 and 7) are arranged to co-act with selector bars 59 to 63 to effect the selected operation.- Each bar 108 is provided with a cam projection 110 (Fig. 7) and a shoulder 111. Certain of these actuating bars are pivotally connected to type bar actuating arms, while others may be connected tooperate printer mechanisms other than the type actions. Cam projections 110 of actuating bars 108 are held against a universal bar 125 (Figs. 7 and 8) supported in members 126. Members 126 are joined by cross pieces 127 and 128 (Fig. 7) to form a printer bail and frame work.' As shown more fully in the copending application, Serial Number 649,- 562, this frame work is supported on shaft 129, and is actuated through

members

145, 146 and 147, by cam 91 with the coaction of a. spring to permit selected ones of bars 108 and shelf 101 to bring the time for efl'ecting to move into the aligned selector bar slots.

to move the selected bars across the slot to effect the selected operation, and then to move the selected bar out of the slot in time to permit restoration of the selector bars and resetting thereof as above set forth, and as fully described in the copending case Serial No. 649,562, in which the mechanisms so far described are fully and in detail shown.

The selector so' far described is initiated in operation at the beginning of each signal and arrested at the end thereof, and the rotary cam shaft is driven at a faster rate of speed than the transmitter. Although perfectly satisfactory in operation, it is found that many advantages may be attained, includin increased speed, reliability, margins and e ciency, by applying thereto my new method of start-stop operation which consists in utilizing an additional stop to become effective at the end of the last selecting impulse of the signals. In this manner, an added stop is introduced and the concordance of action is maintained by a selectin condition coacting with the usual start and stop conditions.

novel line control intermediate the start and stop line control at the beginning and end of each signal to maintain concordance of action of transmitter and receiver is provided in this manner. The only change necessary in the selector so far described, to effect this novel control, is the provision preferably, but not necessarily, on orienting plate 32 of a special stop member 150 in addition to stop member 30, as shown in Figs. 12 to 15. This stop is so positioned and arranged on the plate 32 or in any other suitable location that when the last selecting condition of any code combination or signal is different in character from the stop condition, so that magnet 8 is de-energized, and cam shaft 15 is shifted to the left in Figs. 12 and 13, immediately after the cam 58 has set its corresponding selector 41, and cam 19 has simultaneously actuated member 73, sto pin 34 will engage stop 150 and shaft 15 will be arrested until the end of the selecting impulse. When the last signal interval or stop condition is received, magnet 8 will be energized and will shift cam shaft 15 and stop pin 34 to the right in Figs. 12 and 13. This movement of shaft 15 disengages pin 34 from stop 150 and permits shaft 15 to again start into rotation until it engages shoulder 30 and comes to rest at the end of a cycle. If the'last selecting impulse is the same in character as the stop condition, pin 34 will pass by stop 150 without engaging it, and will come to rest against stop 30. An orienting scale 151 may be rovided for arm 33.

In or er to provide a convenient and rapid adjusting means for the armature gap of selector magnet, while the selector is in operation, the structure may be modified as shown in Fig. 12 so that pivot 10 of armature 9 is mounted on a bracket 152 which is pivoted at 153 to support 5. An extension 154 formed integrally with 152 is arranged in such manner that an adjusting screw extending into a threaded hole in extension 156 of support 5,

will pass through a hole in 154. A spring 157 seated between members 154 and 156 forces extension 154 against the head of screw 155. By adjusting screw 155, bracket 152 is shifted about pivots 153 in a manner to shift the position of pivot 10 for armature 9. The positions and proportions and arrangement of. pivots 10 and 153 of stops 12 and 14, and of the armature extension are such, that adj ustmentof screw 155 makes no change in the extent of motion of the armature, but simply varies the ap between the armature 9 and magnet core Accordingly no change in the position of stops 12 and 14 is required when adjustments of the gap through screw 155 are made.

In Figs. 18, 19 and 20, a mechanism for applying my im roved start-stop control to interfering mec anical action selectors of the well known Baudot, Potts, or telet pe class of mechanical selectors is shown. In all of these selectors a shaft is utilized which is started into operation at the beginning of the rece tion of each code combination by a start con ition and is stopped at the end of each rotation 1) reception of a start condition, and a sing e selector magnet is utilized. This shaft may be represente by shaft 161, driven through a constantly enga d friction clutch com rising a driven mem er 162 secured to sha t 161, a disc of friction material 163, and a driving disc 164 pressing disc 162 into enga ement with disc 163 through action of a spring 165. Member 165 is driven through a tongue and slot connection by member 166 which in turn is secured to and driven by a constantly rotating shaft 168. Shaft 161 may drive or carry the actuating cams of a Baudot or Potts mechanical selector or may drive or carry the shuttle of the teletype selector. Secured to 161 is a stop member 169, which in normal or arrested position engages a sto member 170 rigidly secured to a spindle 1 1 which in turn is sup orted for rotation in a suitable bearing 1 2. Secured to s indle 171 is a trip arm 173, and a spring 174 normally returns

arms

170 and 173 resting against a fixed stop 175. A stop control member pivoted at 17 6' is provided with a normal stop extension 176, an actuating extension 177, and a selectin interval sto extension 178. Extension 177 is connecte pivoted selectin means of a suita le sliding articulated joint member 180. A spring 181 ur es armature 179 against a back stop 182, an magnet 183 when energized holds armature 17 9 a ainst a front stop 184. Rotatable with sha 161 is a suitable selecting interval stop pin 185,carried by a disc 186 rigidly secured to shaft 161.

As shown, the parts are arranged for closed circuit operation, the stop condition being an energized condition of magnet 183 and the start condition being a de-energized condition of this magnet. In normal condition of rest, as shown in Fig. 20, magnet 183 holds member 176 inte ment of member 1 3, and member 17 0 accordingly holds member 169 and shaft 161 against to a magnet armature 179 by osed in the path of move-.

rotation. When a start condition of a signal is received, spring 181 will throw armature 179 against stop 182. This will result in actuation of member 177 to shift member 176 out of the path of movement of 173. With stop member 17 6 removed the tension of spring 174 is not sufiicientto hold shaft 161 against rotation and accordingly member 169 will force 170 to the left in Fig. 19 out of its path of rotation. As soon as 169 is clear of 170, sprin 174 will return

members

173 and 170 to t e position shown in Fig. 19. Rotation of shaft 161 will now continue, and cause successive operation of selector elements which will be interfered with by the actuation of armature 179 in accordance with the received code combinations ofselective signals until the last selecting impulse of the combination is received. Now if the last selective condition of the received combination is the same as the stop condition, magnet 183 will be energized, member 178 will be out of the path of stop 185, the rotation will continue until member 169 engages stop 17 0, and the parts come to rest in the position shown in Fig. 20. If, however, the last interval of the selective combination is different in character from the stop condition, magnet 183 will be de-energized, member 178 will be directly in the path of stop 185, and will be engaged thereby, bringing shaft 161 to rest with the parts in the position shown in Fig. 19, immediately after the selective setting determined by the selecting impulse I preceding the stop condition has been effected. When the stop condition is re ceived, magnet 183 will be energized and will shift 178 out of the path of 185, and simultaneously will shift member 176 into the path of member 173. Shaft 161 will then rotate until member 169 engages member 170 and the parts are restored to the position shown in Fig. 20.

The double stop mechanism shown and described in this application is claimed in applicants copending application S. N. 510,797, filed January 23, 1931.

The application of this stop mechanism to the interfering type of selectors will be obvious to those skilled in the art. A modified form of such a selector is shown in Figs. 18, 19 and 20 as consisting of a set of five discs with cam notches cut in the periphery thereof, and rotatable with shaft 161. These discs may comprise disc 186 carrying pin 185, and discs 187, 188, 189 and 190. In each of the discs 186 to 190 a cam notch 191 is cut. Coacting with each disc is a selector member 192 pivotally mounted on a spindle 193, and each having a control extension 194 and a setting extension 195. Armature 17 9 is provided with an interfering extension 196 so positioned with relation to control extensions 194 that in energized position of armature 17 9 free movement of members 192 into the respective notches 191 under influence of sprln s 197 individual thereto will be permitted, but when armature 17 9 is in retracted position, extension 196 will be in the paths of movement of members 194, and movement of members 192 into notches 191 will be prevented. Notches 191 are relatively displaced with respect to each other in discs 186 to 190 and so positioned, that as shaft 161 rotates, with magnet 183 energized, members 192 will drop successively and in order into the cam notches of the discs 186 to'190 respectively. In practice the rotation of shaft 161 will be definitely timed with relation to incoming code combinations of impulses so that as magnet 183 is energized and de-energized by the incoming impulses, members 192 will be permitted to enter or restrained from dropping into the notches 191, and in accordance with the received code combination, the members 195 will move selectively and in combinations, in, well known manner, to translate the received signal. Members 195 may control the circuits leading to the magnets of a permutation code selector, or may mechanically control the positioning of notched selector members of well known types. Just after cam 190 has permitted selective actuation of member 195 individual thereto, and a local pulse has been sent by a cam or otherwise (not shown) to set into operation the mechanism controlled by members 195, stop 185 and member 178 will be come effective as aboveset forth.

Having described preferred embodiments of the invention, what is desired to be secured by Lett rs Patent and claimed as new 'in actuated position, of said shaft.

3. A selector mechanism comprising a plurality of notched selector members, a plurality of selector elements selectively controlling said selector members, and means for resetting said selector elements in accordance with a succeeding code combination, while a preceding code combination is set up on said selector members.

4. In a selecting mechanism, a plurality of selectable elements; means responsive to received code combinations of electrical conditions for selectively setting said elements; and means for successively restoring certain conditions.

6. In a selecting mechanism, a selector magnet comprisin a core and an armature, stops for limlting t e movement of said armature, and means independent of said stops for adjusting the magnetic gap between sa1d armature and said magnet.

7. A selector mechanism comprising a magnet, a rotary cam shaft shiftable endwise by actuation of said magnet to permit rotation thereof, a plurality of cams carried by said shaft and a plurality of selector members adapted to be selectively positioned by said cams during rotation of said shaft in one relative endwise position thereof.

8. A rinting telegraph receiver comprisa selector magnet responsive to received 0 e combinations of selecting conditions each receded by a start condition; a control mem er operable in cycles in timed relation with the received code combinations initiated in a cycle of o rations by the reception of said start condition; a lurality of notched selector members mova le in combinations under the joint mechanical control of said member and said magnet; to selectively align said notches; a plurality of actuating members selectable by movement in said aligned notches and operating means for said actuating members.

9. The combination as set forth in claim 8, in which said control member comprises a shaft initiated in rotation by the reception of start conditions.

10. The combination as set forth in claim 8 in which selected ones of said actuatin members are movable transversely into and longitudinally across said ali ed notches to complete the printing of a se ected character and are removed from said notches after the printing of the selected character has been completed under the control of said operating means.

11. The combination as set forth in claim 8 together with means interposed between said control member and said notched selector members permitting a succeedin code combination to be received and store while said selector members remain set in accordance with the preceding code combination.

12. In a printing telegraph system, a selective mechanism comprising a plurality of rotary and axially movable selecting members, means controlled by said selecting members to selectively control a type printin mechanism; and means for causing simu taneoi'is axial movement of said selectin members to cause selecting operation of sai first mentioned means.

13. The combination as set forth in claim 12 in which the second mentioned means comprises a single electro-magnet, and a rotary and axially movable shaft upon which said selecting members are mounted.

14. A selecting mechanism comprising a plurality of selector members movable in selective combinations; a control element individual to each selecting element; means for setting said control elements in accordance with received code combinations of selecting conditions; and overlap means permitting a partial restoration and resetting of the set ones of said control elements prior to the restoration of said selector members.

15. The combination set forth in claim 14 in which said last mentioned means permits the complete restoration of only those partially restored control elements which are not set in the succeeding selection.

16. In a selecting mechanism, a plurality of movable selector members; a control element individual to each of said selector members; electro-responsive means for setting said control elementsin accordance with received code combinations of selecting conditions; and overlap means permittin a partial restoration only of said control e ements before restoration of said selector members and complete restoration thereof only after 18. A selecting mechanism comprising a plurality of selectable elements ada ted to be set in combinations; latches for loc 'ng said elements in set position; and means for setting said selectable elements in accordance with received code combinations of selecting conditions and for successively actuating said latches to release set ones of said elements.

19. The combination as set forth in claim 18 in which said last mentioned means comprises a rotary cam individual to each of said selecting elements adapted to engage the coring a plurality of notched selector members movable in combinations to selectively align the notches contained therein; electro-reresponding latch during each rotation there- 20. A printing telegraph receiver comprissponsive means comprising a rotary cam shaft selectively controlling the movement of said members in accordance with received code combinations of selecting conditions; a plurality of actuating bars selectable by movement into said aligned notches; operating means for said actuating bars comprising a rotary cam mechanically controlled by said cam shaft after the reception of the last selecting condition of each code combination.

21. The combination as set forth in claim 20, together with a clutch and cam actuated restoring means for said selector members controlled by said clutch.

22. In a printing telegraph machine, a plurality of notched selector members movable in combinations to selectively align the notches contained therein; electro-responsive means responsive to received code combinations of selecting conditions; solely and entirely mechanical means interposed between said electro-responsive means and said selector members to cause positioning of said selector members in accordance with the received code combinations; a plurality of actuating bars controlled by said selector members; cam actuated operating means for said actuating bars; a motor driven control clutch for said last mentioned means; and a mechanical trip mechanism for said clutch actuated by said mechanical means after the reception of each of the last selecting condition of each code combination.

23. The combination as set forth in claim 22 in which said electro responsive means is a single electro-magnet.

24. In a selecting mechanism, a plurality of selector fingers, a magnet responsive to received code combinations of electrical conditions and a rotating member operated by said electro-magnet to selectively actuate said selector fingers.

25. In a selecting mechanism, a plurality of selector fingers, an electro-magnet respon sive to received code combinations of electrical conditions, means operated by said electro-magnet to selectively actuate said selector fingers and means for latching said selector fingers in actuated position.

26. In a selecting mechanism, an electromagnet responsive to received code combinations of electrical conditions, and a plurality of pivoted selector fingers actuated and latched in actuated position in accordance with the operation of said electro-magnet.

27. In a selecting mechanism, an electromagnet responsive to received code combinations of electrical conditions, a plurality of selector fingers each having a normal and operated position, means operated in accordance with the energization of said magnet for selectively actuating said members to operated positions and latch members for holding the actuated selector fingers in operated position.

28. In a selecting mechanism, an electromagnet responsive to received code combinations of electrical conditions, a plurality of selector fingers consecutively operated and latched in operated position in accordance with the energization of said magnet and means for restoring eachoperated selector finger While setting the preceding selector fingers in accordance with the incoming code combination.

29. In a selecting mechanism, an electromagnet, a plurality of selector fingers operated successively in accordance with the energization of said magnet and means for restoring said selector fingers successively during the reception of a codecombination in preparation for a new code combination.

30. In a selecting mechanism, a plurality of selecting fingers operated in accordance with the received impulses, means for latching said fingers in operated position and means for releasing each of said latched finge rs on receipt of an impulse preceding the impulse to which said finger is responsive.

31. In a selecting mechanism, a plurality of selector fingers successively operated in accordance with received impulses, means for latching the operated fingers in position and means for releasing certain of said latched fingers simultaneously with the operation of one of said fingers in accordance with a received impulse.

32. In a selecting mechanism, a plurality of selector members successively operated in accordance with received impulses, means for latching the operated members in position and means for partially releasing said latched members simultaneously with the operation of said members in accordance with the received impulses and means at the end of each cycle of operation for completely releasing the selectors which do not enter into the new combination.

33. In a selecting mechanism, a plurality of selectors successively operated in accordance with received impulses, means for latching said operated selectors, means for successively partially releasing said operated selectors and means for simultaneously completely releasing said operated selectors.

34. In a selecting mechanism, a plurality of selectable members, a plurality of select able fingers operating said selectable members in accordance with received impulses and means whereby said selectable members maintain said selectable fingers in partially latched position.

35. In a selecting mechanism, a plurality of selectable fingers successively operated in accordance with received impulses and a plurality of selectable members, each having a normal and operated position selectively set in operate position under control of said .fingers, said selectable members while in opof selectable fingers successively operated inaccordance with received impulses, means for latching said operated fingers in position, a plurality of selectable members controlled by said operated fingers, means for operating said latching means to release said fingers and means whereby said selectable members maintain said fingers in partially latched position.

37. In a receiver, a rotating device selectively responsive to received impulses, means responsive to a start impulse preceding the selecting impulses for starting said rotating device, means responsive to a stop impulse following said selecting impulse for stopping said device, and means responsive to one of said selecting impulses for stopping said device.

38. In a selecting mechanism, comprising selector members, a magnet, responsive to received code combinations of impulses and a rota shaft, shiftable endwise by actuation of said magnet, comprising operating means individual to each of said selector members for operating said members in accordance with the actuation of said magnet.

39. A selector mechanism comprising a magnet, a rotary shaft including a plurality of cams, said shaft being shiftable endwise by said magnet and a selector member individual to each of said cams and arranged to be actuated by the rotation of said shaft in one endwise position.

40. A selector mechanism comprising a magnet responsive to received impulses, a ro tary shaft comprising a plurality of cams, said shaft being shiftable endwise by actuation of said magnet, selector member individual to each of said cam members and arranged to be actuated thereby when said shaft is shifted endwise. V

41. A selector mechanism comprising a magnet, responsive to code combinations of received impulses, a rotary shaft shiftable endwise under control of said magnet to initiate rotation of said shaft, and selector members arranged to be actuated when said shaft is shifted endwise, said actuated selector members being latched in actuated position.

42. In a printing telegraph receiver comprising a selector magnet responsive to received code combinations of impulses, a plurality of selectors, spring means for operating said selectors and means controlled by said magnet to selectively release said spring means for operating said selectors.

43. In a printing telegraph receiver comprising a magnet responsive to received code combinations of impulses, aplurality of selectors selected for operation in accordance with energization of said magnet, and means normally holding said selectors against operation, said means operating following the receipt of said code of impulses for releasing said selectors.

44. In a printing telegraph receiver comprising a magnet responsive to received code combinations of impulses, selector fingers operated by said magnet in accordance with said impulses, a plurality of selectors controlled by said fingers and means for normally latching said selectors, said means being operative following the receipt of said impulses to release said selectors to operated position under control of said fingers.

45. In a printing telegraph receiver comprising a magnet responsive to received code combinations of impulses, selector fingers 0p: erated by said magnet in accordance with said impulses, said selector fingers being latched in operated position, a plurality of selectors controlled by said fingers, means for normally latching said selectors from operation, said means being operative following the receipt of said impulses to release said selectors to operated position under control of said fingers and means whereby said operated selectors permit said operated selector fingers to be partially restored while said selectors remain in operated position.

46. In a printing telegraph receiver comprising a magnet responsive to received code combinations of impulses, selector fingers operated by said magnet in accordance with said impulses, selectors operated under control of said fingers, means for partially restoring said fingers in preparation for a succeeding code of impulses, said operated selectors preventing said fingers from being fully restored.

47. In a printing telegraph receiver comprising a magnet responsive to received code combinations of impulses, selector fingers operated by said magnet in accordance with said impulses, means whereby said operated fingers are locked in operated position and means for restoring those fingers which do not enter into the succeeding combinations at the end of the receipt of the combination of impulses.

48. In a printing telegraph receiver, a plurality of fingers successively operated in accordance with a code combination of received impulses, a plurality of selector members simultaneously actuated to operative position under control of said selector fingers, means whereby said fingers are maintained in partially operated position by said operated selector members, and means whereby said fingers operate in response to an incoming combination of impulses while said selectors re main set according to said preceding combination of impulses.

49. In a printing telegraph receiver, an electro-magnet responsive to a code combination of impulses, a plurality of fingers actu- Ill ated by said electromagnet, said fingers being latched in operated position and means for releasing only such fingers that do not enter into'the succeeding combination of impulses.

50. In a receiver, a drive shaft, an intermediate shaft, a driven shaft, a spring connection between said intermediate and said driven shaft for urging said driven shaft axially, an extension secured to said driven shaft, a slotted shelf on said intermediate shaft co-acting with said extension whereby said driven shaft is rotated by said intermediate shaft, said slot being at an angle to aid said spring in urging said driven shaft longitudinally as said intermediate shaft rotates and electro-magnetic means for operating said shaft axially against the tension of said spring member in response to received impulses.

51. In a receiver, a rotatable shaft consecutively co-acting with a plurality of members in response to received impulses and an adjustable member for variably relating the positions of said shaft with respect to said received impulses.

52. In a receiver, a rotatable shaft, consecutively co-acting with a plurality of members in response to received impulses, a normal stop position for said shaft and an adjustable member for bringing said shaft to a predetermined stop position whereby said shaft is maintained in synchronism with the received impulses.

53. In a receiver, a plurality of selectors, means for consecutively operating said selectors in accordance with received code combinations of impulses and means for consecutively restoring said selectors to normal.

54. In a receiver, a single electro-magnet responsive to received combinations of code impulses, a plurality of type-bars selectively operated by said electro-magnet and means whereby said electro-magnet is operating in response to an incoming code combination of impulses while the selected type-bar of a prezeding code combination is being operate 55. In telegraphic receiving apparatus, a series of independently movable control fingers; finger setter means comprising a cam member. individual to each control finger; means for moving said finger setter means with respect to said control fingers; a relay responsive to the separate signals of each group of signals to be received; means under the control of said relay whereby the finger setter means will be rendered operative or inoperative on each of the control fingers successively on receipt of the signals, according to the character of the signals; and means,

, the action of whichis'controlled in accord ance with the relative setting of the series of control fingers.

56. In telegraphic receiving apparatus, a

series of independently movable control fingers; finger setter means comprising a cam member individual to each control finger; means for moving said finger setter means with respect to said control fingers in synchronism with the signals to be received, a relay responsive to the separate signals of each group of signals to be received; means arranged to be operated in accordance with the signals to be received and whereby the finger setter means can be moved toward each of the control fingers in turn and for afterwards returning it; said means being under the control of said relay; and mechanism controlled by said control fingers in accordance with their setting;

57. In telegraphic receiving apparatus; a series of independently movable control fingers; finger setter means comprising a cam member individual to each control finger; means for moving said finger setter means with respect to said control fingers; a relay responsive to the separate signals in each group of signals received; means under the control of said relay whereby the finger setter means will berendered operative or inoperative upon the control fingers successively; according tothe character of the signal; and printing mechanism, the operation of which is controlled in accordance with the relative setting of the series of control fingers.

58. In telegraphic receiving apparatus; a series of independently movable control fingers; finger setter means comprising a cam member individual to each control finger; means for moving said finger setter means with respect to said control fingers; a relay responsive to the separate signals of each group of signals received; means under the control of said relay whereby the finger setter means will be rendered operative or inoperative upon the control fingers successively, according to the character of the signal; printing mechanism comprising a series of notched combs the relative positions of which control theprinting of a character or the formation o-fa space; and means for moving the series of control fingers. when set to correspond to a received signal to correspondingly move the combs relatively to one another.

59. In a printing telegraph receiver, a plurality of selector members; a rotating shaft longitudinally movable in response to received current impulses for selectively operating said selector members; and. latch members for maintaining said operated selector members in position.

60. In a printing telegraph receiver, a plurality of selector members; a plurality of latch members individual thereto; a rotating shaft comprising a plurality of cams individual to said selector members; means for rotatingfsaid shaft whereby said cam members operate said latch members sequentially; and

means responsive to received impulses for moving said shaft longitudinally whereby. said cam members operate said selector members.

61. A printing telegraph receiver comprising a selector magnet responsive to received code combinations of selecting conditions each preceded by a start condition; a control member operable in cycles in timed relation with the received code combinations initiated in a cycle of operation by the reception of said start condition; a pluralityof notched selector members movable in combinations under the joint mechanical control of said member and said magnet to selectively align said notches; a plurality of actuating members selectable by movement in said aligned notches; operating means 'for said actuating members; and means operated by said control member for automatically initiating operation of said operating means after the reception of the last selected condition of each code combination.

62. A printing telegraph receiver comprising a selector magnet-responsive to received code combinations of selecting conditions; a control member operable in timed relation with the received code combinations; a plurality of notched selector members movable in combinations under the joint mechanical control of said member and said magnet to se lectively align said notches; a plurality of actuating members selectable by movement into said aligned notches; operating means for said actuating member automatically initiated in operation by said control member after the reception of the last selecting condition of each code combination; and means interposed between said control member and said notched selector members permitting a succeeding code combination to be received while the previously selected actuating member remains in the previously aligned slots.

63. In a printing telegraph receiver, a selector magnet responsive to received code combinations of selecting conditions; a control member; means for continuously advancing said control member in timed relation with the received code combinations of selecting conditions; a set of notched permutation members; a corresponding set of primary selectors movable under the joint mechanical control of said magnet and said control member for positioning said permutation members in combinations to selectively align the notches thereof; a plurality of printer controlling elements selectable by movement into the aligned notches of said permutation mem- 5 bers; and motor driven, printer actuating means initiated in operationby said control member at the end of the reception of each code combination.

In testimony whereof, I afiix my signature. 65 EDWARD E. KLEINSCHMIDT.