US2391984A

US2391984A - Printing telegraph apparatus

Info

Publication number: US2391984A
Application number: US524101A
Authority: US
Inventors: Ross A Lake
Original assignee: Teletype Corp
Current assignee: AT&T Teletype Corp
Priority date: 1943-02-22
Filing date: 1944-02-26
Publication date: 1946-01-01
Anticipated expiration: 1963-01-01

Description

a A. LAKE PRINTING TELEGRAPH APPARATUS Original Filed Feb. `22., 1943 4 Sheets-Sheet' l ATTORNEY Jam. E, 1946.

Jan. l, 1946. R- LAKE 2,391,984

PRINTING TELEGRAPH APPARATUS Original Filed Feb. 22, 1943 4 Sheets-Sheet 2 |NvENToR ROSS A. LAKE ATT RNEY Jan. 1, 1946, R. A. LAKE PRINTING TELEGRAPH APPARATUS Original Filed Feb. 22. 1943 4 Sheets-Sheet 5 nobis FIG. l0

mvemon ROSS A. LAKE A oRNEY n Jan. L 1946. R. A. LAKE PRINTING TELEGRAPH 'APPARATUS original Filed Feb. 22, 1943 4 sheets-snaai 4 INVENTOR ROSS A. LAKE Patented Jan. 1, 1946 PRINTING T-ELEGRAPH APPARATUS Ross A. Lake, "Oak Park, Ill., assignor 'toiTele'typAe Corporation, Chicago, Ill., va corporation of Delaware riginal 'application February y2-2, 1943, -Serial fNo. 476,693. Divided Vand this application `February )2.6, 1944, Serial .No. 524,101

"6 Claims.

The present invention relates to printing tele- 'graph apparatus and `more particularly to .appa-` ratus for the perforation of Va tape and the .trans" mission of electrical impulses identifying telegraphic messages.

This application is a division of copending application Serial No. 476,693 filed February 22, i943.

Transmission of character identifying signals in telegraph systems is frequently achieved in accordance with a control strip including control indicia formed in varying combinations either by manually or remotely operated apparatus. Specifically, the control indicia .may be in the form of transverse rows of perforations formed in a tape either by akeyboard perforator or by a signal controlled perforator which is commonly referred to as a reperforator. The tapel thus prepared passes through a transmitter or sensing mechanism, to control correspondingly the transmission in succession of impulses identified with the perforations, which has its tape entrance channel separated from the tape exit channel of the perforator. Under such conditions, a short length of 'tape extends between the .perforator and the transmitter and contains a group of periorations, for the last character perforated is not sensed unless the tape is advanced to present such group'of perorations to the transmitter or unless the sensing mechanism is made movable along the control kstrip to sense the last control indicia and effect transmission of its corresponding signal impulses, as disclosed in Patent No. 2,262,012, granted November 11, 1941, to R. A. Lake.

The principal object of the `present invention is to provide a perforating apparatus wherein the perforating mechanism is susceptible of movement along the tape under certain operating conditions.

Another object of the invention is to provide a perforatng device which may be employed in conjunction with a transmitting apparatus whereby the periorating instrumentalities are movable along the tape so that the last code perforated in the tape is immediately transmitted by the transmitting device without delay.

The above and other objects of the invention are accomplished by the provision either of a manually operated keyboard perforator or a signal controlled perforator operative in conjunction with a tape sensing mechanism including a plurality of sensing iingers set permutably in accordance with the perforations or control indicia ina previously prepared control strip to control the transmission of 'impulses symbolic of `the characters tombe reproduced. The .per'forator to which the .invention .has ,been .specically applied comprises a plurality of .key levers arranged toset permutably a .plurality of bars which, in turn, set correspondingly .a plurality `of .interponents to control, .upon the operation .of a mechanically operated punch hammer, the operation of punches arranged in .a transverse .row to perforate the control strip in accordance with the .code `allo cated to a .depressed key lever. The perforating instrumentalit'ies of the Aperforating device according to this inventionare arranged to .be pivoted so that the periorating gpunches Vmay be advanced toward the transmitting device in order that the last code perforated may be immediately transmitted by the transmitting device. Y

Cooperating with the code punches iis a 'feed hole `punch for inserting in the tape in advance of the code perforations a feed hole Which cooperates with a tape feeding mechanism -o'f 4the perforating unit to advance the 'tape therethrough step by step in order that the groups of perforations therein may be punched successively.

The perforating mechanism includes, as Apreviously indicated, punches or punching elements which are mounted in a carrier capable of oscillation vabout a xed pivot away from and toward the entrance channel of 'atape transmitter. Normally, 'the tape entrance channel of 'the sensing unit of Va transmitter 'is immediately adjacent .or contiguous to the 'exit `'channel of lthe `perforator and the tape passes directly from'the iperf'orator to the sensing unit without any exposed portion of the tape. When "the perforator is operated, the tape feed mechanism thereof advances the tape and causes the perforating vunit to 'be pushed or pivoted a distance yequal to the Adistance :between 'the transverse rows 'of `perf'orations thus starting a transmitting 'distributor which includes means to move the tape in the sensing unit, but since the tape may be perforated at Aa 'greater rate of `speed thanit is transmitted, the periorator is pivoted away from the AVsensing mechanism until it reaches va predetermined back Astop,'whereupon a A'loop of tape is 'created between the ,per'forator and the transmitter. `When the per'orating operations are terminated 'and a 'loop of tape exists between the vperforator and 'the transmitter, the transmitter continues vto transmit the `signals under the Acontrol lof the tape while Ythe tape is advanced through the transmitter until the tape is taut between the transmitter and perforator whereupon the-tape draws-orpulls the perforator toward the transmitter funt-il the perforator is again contiguous to the transmitting mechanism,

tape feeding operation has been performed through the instrumentality of a rectilinear feed mechanism. The tape advancing mechanism shown in the Lake patent includes elements operated cyclically under the controlV of cams, con` stituting a part of the transmitting cam distributor drum, according to a rectilinear action. In the perforating device, according tothe present invention, a corresponding rectilinear action is l Heretofore, as j shown in the afore-mentioned Lake patent, the

provided for advancing the tape through the 'per-` forator. In addition to this, a reversing mecha-Y nism is provided wherein the tape feeding cams are adjusted so as to operate the rectilinear operating mechanism in a reverse direction to back space the tape through the perforating device.

A better understanding of the invention may be had from the following description taken in conjunction with the accompanying drawings, wherein,

Fig. 1 is a front elevational view, partly in section, of the structure according to the invention;

Fig. 2 is a fragmentary elevational view showing the pivoted perforator of the present invention associated with the pivoted transmitter of Lake Patent No. 2,262,012;

Fig. 3 is a plan view of the structure disclosed in Fig. 1;

Fig. 4 is a sectional view taken on line 4 4 of Fig. 1 to show the back space shift mechanism;

Fig. 5 is a top view of the rectilinear feed operating mechanism;

Fig. 6 is a sectional View taken on line 8-6 of Fig. 1;

Fig. 7 is a sectional view taken on line 'I-'I of Fig. 1;

' Fig.'8 is a sectional view taken on line 8-8 of Fig. 1;

' Fig. 9 is a vertical sectional view taken through the' feed punch mechanism;

Fig. 1'0 is a detailed View of the taut tape lever for the feed punch mechanism;

' Fig. 11is` a vertical sectional view of the rectilinear feed operating mechanism;

`Figs. 12 and 13 are separate views showing the component elements of the rectilinear feed mechanism and the operating cams therefor;

Fig. 14 is a vertical sectional view of the perforating mechanism; and

Fig. 15 is a circuit diagram of the electrical connections for the apparatus disclosed in Fig. 1.

Having reference to Fig. 1, the structure according to the present invention may be considered as including the following principal units; namely, a pre-punch feed hole mechanism 2|, a pivoted perforator 22 for perforating code holes in transverse rowson the record strip, a tape sensing unit 23, and a transmitting unit 24. Each of the several units is mountedA on a base casting 25. In the specific embodiment of the invention disclosed, the perforatingmechanism is indicated as being keyboard operated or controlled. The keyboard mechanism employed is of4 the type shown in R. A. Lake et al. Patent No. 1,969,891 and comprises a plurality of key levers 26 provided at their outward extremities with kevtops 21 arrangedinakeybank.l A' Beneath the key levers 26 is arranged a series of pairs of code bars 28 adapted to be operated vertically so that when, upon depression of a key lever 26, one of the key bars 23 of the pair will be depressed while its companion bar will be raised or elevated. Associated with each of the pairs of bars 28 and carried on a pivot shaft 3| is a rocker member 29 which is arranged to cooperate wth the .bars 28, as described in the afore-mentioned Lake et al. patent, so that the rocker arms 2S will be rocked either clockwise or counterclockwise by the bars 28, depending upon the permutation code allotted to the particular key lever operated. Pivotally articulated to the depending arm of the rocker member 29 (of which there is one located at each end of the bar 28) is a link member 32. Each of the link members 32- extends leftwardly (as in Fig. 1) beyond the rocker member 29, and is pivotally articulated to the lower end of a punch interponent operating lever 33, which is one of a series of levers pivoted on a shaft 34, suitably journaled in the apparatus. It is understood, of course, that there are a number of pairs of bars 28 corresponding to the permutation code employed; for example, in the present disclosurea five-unit permutation code is contemplated. Hence, there are five pairs of permutation code bars v28 and five links 32, as Well as five interponent operating levers 33.' As disclosed in the aforementioned R. A. Lake et al. Patent No. 1,9o9,9l, there is also associated with the plurality of code bars 28 a universal bar (not shown) which is adapted to be depressed or operated upon each depression of the key lever 28 to initiate the operation of the periorating apparatus, as will presently appear.

L'acn of the levers 53 1s pivotally associated at its upper end with an interponent member 35 which is slidably carried in the actuating member or hammer 35 pivotally carried on shaft 3T. As shown in Figs. 6 and 14, the hammer 36 is actuated about the pivot shaft 3l by means of the operating lever 38 which is also pivotally mounted on the shaft 31 and Which is adjustably attached to the hammer 36 through the instrumentality of the vertical portion perforator operating cam 42, carried on a sleeve member |23 mounted on main shaft 43. It will be noted that the cam 42 has two similar cam contours so that the perforator is operated once for each one-half revolution of the cam. As will be presently described, the structure herein disclosed is adapted to operate in such a manner that the cam rotates one-half revolution upon each depression of the key lever, hence the two similar cam contours on each cam. The follower roller 4I is held in contact with the periphery of the cam 42 by means of a spring 44 which tends to bias the lever 38 normally in a clockwise direction.

Each interponent 35 is, at its free end, adapted to cooperate with the bottom end of an associated punch member 45 (Figs. 1, ll and 14). As will presently appeal', the bottom end of the punch member 45 which cooperates with the interponent S5 is arcuate so that the point of contact between the punch member 45 and the interponent 35,is coincident with the pivot center of the pivotecl perforator 22. The relation between the guide 46 and punch member 45 is such that the punch members 45 are held in proper cooperative rela-r to slide on guide member 4B. Each of the punch;

members 45 is provided at its upper end with a 39 (Fig. 6). Arm 38 carries a follower roller 4I which cooperates with they cylindrical `punch element 41, which is movable through an openlngin Va guide .plate 48 and cooperates .with a die plate 49. The 'p1ates48 and 49 are vspaced apart to form a tape guide for the tape 51. i

Thus, upon the operation of a key Ylever 2.6, the permutation bars 28 kare ,set according to the permutationvcode combination allotted to the operated key lever, and the rocker .arms v29 are operated either clockwise or counterclockwise according to the vertical motion of the .bars 28, as described in the R. A. Lake et al. Patent No. 1,969,891, whereupon the links 32 are reciprocated rightwardly or leftwardly to correspond with .the code combination set up in the .bars 28. levers v33 are Aset either in a clockwise or counterclockwiseposition .b y the links 32 to set or Aposition the interponents 35 in vtheir rightward or leftward positions, bringing the left end of the interponents either into the path .of or out of the path of the vertically .operating punch members 45, `so that when the punch hammer or actuating member 36 is operated .through the instrumentalityof cam 42 and lever 38 (Fig. 14), .the vinterponents 35 are rocked clockwise (as viewed vin Fig. 1) to raise the punch members 45, if an interponent is positioned therebeneath, to cause a perforation to be made in the tape 51.

Secured to the bottom surface of punch .actuating member 36 is a springr member 36 which is formed at its free end .to carry a yoke member 40 which spans projections 56 of the punch members 45. Yoke member 4i) thus serves as a yieldable punch stripping instrumentality. Carried in the member 36 beneath each interponent 35 is a ball 60 which cooperates with a pair of V- shaped notches in the bottom edge of its associated interponent. The balls 66 are pressed against the interponents by Ythe spring member 3D to provide a detent means to hold the interponents '35 in their set position.

As previously mentioned, the structure disclosed comprises a pre-punch mechanism 21 wherein the feed holes are punched in the tape I at a point 4in advance of the code-hole perforator 22. As shown in Fig. 9', a feed-hole punch 52 is partially enclosed in a housing 53' which conceals a spring 54 arranged to subject punch 52 tospring tension and restore it to its'normal position. Punch 52 is .guided in housing 53 by enlarged integral ange portion 55 and is further guided in guide plate 56 and cooperates with a die plate 51. In the embodiment disclosed, the feed punch 52 is operated through the instrumentality of an adjustable screw 58, disposed in vertical alignment with punch 52 and carried in a bar 59 pivoted at 61 on a member 62. As viewed in Fig. 7, bar 59 extends rightwardly andhas connected at 'its extremity one end of a spring 63 the otherend of which is secured to a spring post 64, attached to the `frame 65. Substantially intermediate the screw 58 and spring 63 (Fig. yf1) is a yoke member 66 which engages vthe bar 59 and is slidable vertically on

studs

61 and 68. Yoke member 66 cooperates with an eccentric cam A69 xed to an operating shaft 1l Ajournaled in frame 65. l

Shaft 1| rotates continuously and carries at its end a gear 12 (Fig. 3), which meshes with a pinion gear 13 'xed to a cross shaft 14, journaled in bearings and 16 mounted on the base 25. Continuous rotation is imparted to the cross shaft T4 through a gear 11 which 'is m'eshed with a pinion gear 18 carried :on shaft 19 of a `motorgl. Accordingly, the "yoke" member '66 "reciprocates The- in :a .continuons manner, and `carried on theyoke member A66 -is a tape feeding'pawl y82 which cooperates witha feed 'ratchet 83 xed to shaft 84 mounted in the frame 65. In vtlsrejpresent embodiment, the ratchet A83 comprises teeth cut in a sleeve '85 `(Figs. Sand '7) which'also carri-es integral therewith a peripheral series of tape feeding Apins 86. Thefp'awl 82 is 'normally biased in a counterclockwise direction :about vstud-'81 by aspring :88. Inv this'manner, thefpawl 8,2 is normally in engagement with the ratchet 183 so vthat upon veach upward :movement of the yoke =66,the ratchetv83 (and therefore, sleeve 84) is rotated counterclockwise, as viewed in Fig. 1, .one angular step Ato .therebystep the tape -leftwardly from one perforating position `to `the next. `Also xed to the sleeve 85 is astarwheel 89,and cooperating therewith v'is a' detent member -91 which is :spring biased in` a :counterclockwise direction, by a spring f' 92 about ashaiti93t' i n 4As 'previouslyimentioned the y.production :of Afeed holes in the tape is vcontinuous ysince the Ishaft A1l has .been indicated as :continuously rotating. However, to :prevent too great ran amount of tape from being perforatedwith feed holes in the event that the perforationfof code holes is not keeping pace therewith, thecontrol device shown in Fig. 10 is provided. Having'reference to Figs. 1, 3, 7, and l0, there is loosely mounted on the shaft 61, a lever, generally indicated a`s 94, which comprises a downwardly and leftwardly directed arm '95 having a lateral portion 96 of sufficient length to span the entire width of the tape 5I (Fig.-3). As shown in Fig. L1, 'the tape 5l, after passing over the sleeve or feed roller 85, is directed downwardly underneath the lateral portion 96, then upwardly toward the code perforator 22. As the loop lof tape is formed between the feed hole punch and the code hole punch, the lever 94 is permitted to rotate in a counterclockwise direction, thus bringing the shouldered portion of extension 91 into latching engagement with the bar 59, as shown Yin Fig. l. When this relation between lever 94 and bar 59 exists, the bar 59 and yoke 66 can no longer respondto the pull of spring 63 and thus Vthe reciprocal movement of the yoke 66 is suspended or prevented. Then when the loop of tape vis taken up, and the tape becomes-taut, the lever 94' `will be rotated by the tape in ra clockwise direction about the shaft 61, so that the extension 91 becomes disengaged from the bar 59, thereby permitting further reciprocation of the yoke lil? and consequent perforation of -feed holes in the tape. A lever arm 98 is also pivotally mounted on shaft 61 and is provided with a cam portion 99 which acts, upon counterclockwise rotation of lever 98, to cam or raise bar 59 upwardly, causing bar 59 to pivot about the pin 6| for the purpose of manually suppressing the Ioperation of bar 59. According to the present invention, the perforator unit 22, as previously mentioned, is pivoted. The perforator unit (Fig. 6) includes two frame members IUI and |02, pivoted on pivot pins |03 and |04 (Fig. 3) in a 'manner to permit free oscillation of the perforator unit. Pins |03 and' are the die 'plate 49 and the' punch guide plate4`8;

Secured-'to plate '49 by a screw "is 'a reed Spring which carries at its free end two pinsV H2 and H3 (Fig. 2) which'cooperates with the rectilinear feed mechanism, as will appear hereinafter. Within the space formed by the metallic spacer |08, is a slidably movable member ||4 which is formed with a cam, groove H5 (Figs. 1 and 12) and which carries on its upper extremity pins H6, H1, and H8. Pins ||6 and H8 are of the same length, but pin |1 is considerably longer than pins H6 and H8, the purpose of which will appear more clearly hereinafter. Cooperating with the cam groove H5 is a pin H9, secured to the free end (Fig.v 13) of arm |2| articulated on cam operated lever arm |52. Pin ||9 extends from both sides of arm |2|, a length sufficient to permit it to travel in vertical slots |22 in the member |08 (Figs. 1, 11, and 12) As will be described more fully hereinafter,

member H4 and arm |2| areoperated in timed relation. Arm I 2| is drawn upwardly in the slots |22 and when so drawn and due to the particular shape of cam groove H5, member H4 will be moved to the left (as viewed in Figs. 1, 11, and l4), and relative movement between the punch elements andl the tape 5| will be effected. Member 4 then is moved downwardly to withdraw pins H6, H1., and H8 fromY engagement with the feed perforations alreadyperforated in the tape 5|. Following this action, arm |2| is moved downwardly, and due to the afore-mentioned camming action between pin H9 and groove H5, member H4 is moved rightwardly. The member ||4 is thereafter elevated to cause the pins H6, H1, and H8 to engage other feed perforations in the tape 5| to achieve, on a subsequent cycle, relative movement between the perforating elements 45 and the perforated tape 5|.

Mounted on shaft 43 and slidable with respect thereto in an axial direction is a cam sleeve |23 (Fig.`4). The afore-mentioned cam 42 (Fig. 14) for operating the punch hammer 36 is integrally associated with sleeve |23. Moreover, a series of cams |26, |21, |28, and |29, identified with the rectilinear feed mechanism of the pivoted perforating unit are also integrally associated with the cam sleeve |23. Cams |26 and 21, as more clearly shown in Fig. 12, are associated with the.

arm H4 of the rectilinear feed mechanism, and cams |28 and |29 are associated with the arm |2|, as shown in Fig. 13.

As previously mentioned, the electric motor 8| has on its shaft a pinion gear 18 which meshes with a gear 11 fixed to a cross shaft 14. Shaft 14 has fixed thereon a pinion |3| which meshes with a gear |32 fixed to shaft 43 associated with the perforating mechanism.

Shaft 43 carries thereon, adjacent the clutch trip mechanism indicated generally as |33 in Figs. 1 and 3, a combination switch and positive clutch (not shown) of the type and construction illustrated in Figs. 5 and '7 ofthe afore-mentioned Lake Patent No. 2,262,012. Upon depression of any of the key levers 26, the code bars 28 will be operated, asA will be the universal bar (not shown) to effect the operation of the clutch release mechanism |33. For example, upon the depression of the universal bar, a link |34 connected thereto is operated rightwardly against the tension of a spring |35 to cause the counterclockwise rotation of a bell crank |36. The counterclockwise rotation of bell crank |36 causes a link |31 to be elevated to cause the counterclockwise rotation of elements |38 and |40 of the clutchrelease mech-l anism |33 about shaft |39. In this manner, the stop projection onqelemen't 38 is( removed from versal bar upon the depression of any of the keylevers 26.

As set forth in said Relber patent. the clutch release mechanism |33 is normally operative through link |31 to effect a single operative cycle,

and hence is called a non-repeat clutch release" mechanism. Briefly,- this is achieved by the offset relation of the confronting stop shoulders on elements |38 and |40, so that in the event a key lever is held depressed, the shoulder on element |40 will be effective upon vlatch |4| to arrest rotation after one cycle. Another feature of the present invention is to provide a means for causing repetition of the operating cycle. This is accomplished through the instrumentality of a link 235 associated with the repeat key (not shown), which, when operated, causes the link 235 to be operated rightwardly against the' tension of a spring 236 to cause counterclockwise rotation of a bell crank 231. The counterclockwise rotation of' bell crank 231 causes a link 238 to be elevated to cause the clockwise rotation `of element |40 to hold the shoulder thereon out of operative relation with the element 4| operation, the links |31 and |38 are caused to be elevated simultaneously, either by operating two keys concurrently; namely, a character key and the repeat key; or'if desired, bell crank 231 and a bell crank with its link, comparable to bell crank' |36 with its link |31, may both be connected to link 235 so that both elements |38 and |40 are operated by a single key.

According to the present invention, a rectilinear feed means is provided in which forward spacingof the tape is controlled by a pair of cams |21 and |29, and back spacing of the rectilinear feed mechanism is effected through the instrumenv tality of a pair of cams |26 and I28,'provision being made for shifting the cam sleeve |23 manually by means of a shift bar |42, shown in Fig. 4.l

Lever |48 is normally biased counterclockwise by a spring |58 (Fig. 12) to hold its arm |59 against an adjustable stop' |69. |49' is. normally biased counterclockwise by a spring |19- (Fig. 13) to hold its arm |19 against an adjustable stop |39. With this arrangement, the stops l 69 and |89 are so adjusted as to provide a slight clearance between follower levers |48 and |49 and their respective pairs of cams, when said camsv are in their rest or normal stop positions, as shown in Figs. 1, 12, and 13, to permit the cam sleeve |23 to be readily shifted to control forward and' backward spacing of the tape 5|, as will appear hereinafter.

As previously mentioned, the cams on shaft 43 are each provided with two similar cam peripheries', since the cam sleeve is arranged to make one-half revolution for each complete cycle of operation of the perforator 22. Therefore, during each one-half revolution o-f cam sleeve |23, a perforatng operation is completed,y followed in the same cycle by a single tape stepping operation of they rectilinear feed mechanism. As indicated in the drawings, the cams are shown in their stop position. Having reference to Fig. 11, the tape feed element H4 of the rectilinear feed mechanism is shown in its normal stop position. The tape feed member i4 normally is held in its position shown in Fig.. 1l, wherein the member H4 is in its withdrawn position; that is, with the pins H6, H7, and H3 withdrawn from the tape and with the member H4 in its rightward position. For forward feeding or stepping of the tape 5|, the tape feed member |4 is rstV elevated to bring thepins H6 and H9 into engagement with the feed holes in the tape and at the same time pin H1 operates to lift the detent member i The member H4 is then operated leftwardly in its elevated position to advance the tape one space, whereafter it is lowered to bring the pins 'out of engagement with the tape, and then the member H4 is moved rightwardly in its lowered position back to the normal position shown in Fig. 11. As previously mentioned, the members H4 and |2| are operated in timed relation for forward spacing by cams |21 and |29. Also, the members H4 and |2| are operated in timed relation for back spacing by cams |25 and |28, as will hereinafter appear. 1

Die plate 49 and guide plate 4S are each provided with aligned open ended slots |53 (Fig. 3) within which the rectilinear tape feeding mem-- ber i4 is operative. The

plates

48 and 49 are flared at the entrance end |54 to facilitate admission of the tape 5| (Fig. 1). Secured to plate 49 by a screw is a reed spring H| which carries at its free end two pins |2 and I3, Fig, 1, which align vertically with pins H6 and H8, respectively, when the member H4 is in its rightward position. As previously mentioned, pins H5 and H8 are of the same length and cooperate with pinsr H2 and H3. As disclosed in Figs. 1 and l1, pin is substantially longer than pins H6 and H8 and thus will engage the under surface of reed spring H and move it about its pivc-t to free pins ||2 and H3 from the feed perforations intape 5|. Pin Hl having engaged a feed perforation prior to the engagement of pins 55' and H8I with feed perforations and prior to the disengagement cf pins |2 and I3 from the feed perforations,r tape 5| will be held against accidental displacement and will be maintained in proper alignment with the 'punch elements 4'?.

Likewise, lever y Also, when member ||4is lowered and pins H5 and ||8 are moved free of feed perforati'ons; in the tape, and prior to the engagement of pins- ||2 and |3'with the feedperforations correspond'- ing to those previously engaged by pinsv H2 and H3, respectively, pin H1 will prevent the displacement of tape 5|. Such a construction insures also that the feed perforations will not be mutilated, andalso insures that the tape will be properly spaced between successive code perfo'- rations to enable the transmission of signals co1- responding toV the setting of the punch elements 41.

The withdrawal of pins H6, HT, and ||8-from the feed perforations, the upward stroke: of' arm |2|and the reinsertion of pins H5, H1, and H8 in feed perforations are achieved by their respective cams during the perforation of the holes in accordance with the code combination' ofimpulses indicative ofv the setting of the-punch elements 41.

Since the rectlinear action is substantially the same as thatv disclosed in Lake Patent'No. 2,262,012, reference may be had to Figs. 9 to 12, inclusive, of said patent for a disclosurev ofV the various positions'of the rectilinear feed mechanism through which the perforated tape is advanced. Specically, starting from. the normal position of arm. H 4, which is the downward and rightward position as shown in Fig. 11, arm ||4 is moved., for forward spacing, upwardly by its cam |21 (represented by that'portion ofthe cam periphery between points,- |B| and |62, Fig. 12) to bring pins H6, H1, and H8 into engagement with the feed holes in tape 5| (Fig. l) and to raise reed spring to withdraw pinsy H2 and H3 from theY tape. During this interval, cam |29 (Fig. 13) has moved from point |53 to |64 to raise (through arm` |2|) pin H9 a slight dis- 4.0 tance in cam groove H5 in arm H4, but' not yet suicient to impart leftward movement to arm H4. Thereafter, arm H4 remains in its upward position while cam |21 continue-s its rotation, due to the dwell-on said cam represented-by thatportion betweeny points |62 and |65. During this latter interval, cam |29 operates between points |64 and approximately |66 to raise pin H9 upwardly, which operates in cam groove H5 toactuate arm ||4 leftwardly to move the tapev 5| forwardly* (leftward, as viewed in Fig.' 11)'. Then, as cam |21" completes its half revolution indicative of a cycle of operation, a drop-off on the periphery of the cam is encountered atV |65 by follower lever |48 toeflectl a downward movement of arm |4 and a consequent withdrawal of pins H6, H1, and H8 from the tape 5|. Finally, shortly after said withdrawal has been effected, arm |49 encounters the drop-off on the periphery of cam |29 at |66 to cause the downward movement of pin H9, which, coacting with cam groove H5, causes arm. ||4 to move rightwardly to return to its normaldownward and rightward position, as shown in Fig. 11. Thus it is seen how, through the instrumentality of cams |21 and |29 the rectilinear feed action is accomplished' to effect the forward motion of the tape 5 According to the present invention, theV backward spacing of" the tape is also accomplished with the present rectilinear feed mechanism. As previously described, a bar |42' (Figs. 1 and: 4) is provided for shifting the cam sleeve |23 to produce back spacing. When bar |42v is pressed inwardly (rightwardly as" shown in Fig. 4)', the cam sleeve |23 is moved rlghtwardly (which is permitted by the clearance between the cams and the arms |48 and |49 as shown inFigs. 12 and 13). By this action, cams' |26 and `|28 are brought into register with follower arms |48`and |49 of the rectilinear feed Velementsr ||4 and |2|, respectively. In producing or effecting the back spacing operation, the rectilinear feed element ||4 still rests in its normal rightward and downward position as shown in Fig. 11. However, for back spacing, the arm I I4 is caused to move, first, leftwardly while in its lower position, then upwardly, then rightwardly while in its upper position, then downwardly to its normal downward and rightward positions as shown in Fig. 1l. To produce this result, the cam contours of the peripheries of cams |26 and |28 are so conformed as to time this operation.

Specifically, starting from the normal position of arm II4, which is the downward and rightward position as shown in Fig. 11, arm ||4 is moved for backward spacing, first to the left by cam |28 (represented by that portion of the cam periphery between points |63 and |61). By this action, nin ||9 has been raised in the cam groove I|5, which camming action imparts leftward movement to member ||4. During ,this interval. cam |26 has moved from point |6| to point |68. As seen in Fig. l2. the point on the cam between points 6| and |68 is a cam dwell whereby no upward or downward movement is imparted to the arm II 4, it being merely under the sole control of cam |28. Thereafter. as the cams continue to rotate. the member ||4. having reached its extreme leftward position (as viewed in Fig. 11), is moved upwardly to bring the pins II6, I1, and ||8 into register with the feed holes in the tape. This motion to member |I4 is effected bv the cam |26 between tbe points |68 and |69 thereof. During this interval. the cam |28 rotateawithout' effect upon the lever arm |49 and rectilinear feed element |2| because of the dwell between points` |61 and I1| on the cam periphery of cam 28.

Thereafter, the member |I4 remains in its upward position in engagement with tap 5| due to the dwell between tbe points |69 and |12 on cam |26. Then. as cam |28 rotates. the portion there of between point |1| and |13 governs the downward movement of arm I 2| and hence pin I I9, which enacting with the cam groove I5, causes the rectilinear feed member I I4 to move rightwardlv in its upward position to impart corresponding backward (rightward, Fig. 11) movement to the tane Thus. as cam |26 completes its hali' revolution indicative of a cycle of operation. a drop-oil on the cam is encountered at point |12 by follower |48 to eiTect the downward *.novement of member I4 and the consequent withdrawal of pins |I6, ||1, and |I8 from the tape 5|. Finally. shortly after said withdrawal has been effected arm I 49 rides on the dwell of the cam |28 from point |13 to the normal stop position of the cam, thus causing no effect to the pin 9, whereupon the rectilinear feed member I I4 is returned to its normal rightward and downward position as shown in Fig. 11. As shown in Fig. 1, the reed spring I I is wide enough to accommodate the entire rightward and leftward extent of movement of the rectilinear feed member |I4 so that it will be operative for both the forward and backward feeding operations of the rectilinear feed mechanism.

In effecting the back spacing operation, the arm or bar I 42 is actuated' as previously described, in a rightward direction, as viewed in Fig. 4, and after the cam sleeve |23 has been positioned for back spacing, it is understood that the keyboard mechanism will be operated either to produce all marking perforations in the tape simultaneously with the back spacing operation by operating the Letters key or by operating the Blank key so as to release the cam sleeve for operation through the clutch release mechanism |33 as previously described.

The pivoted punch unit 22 is shown in Fig. 1 in a vertical or intermediate position. However, in its extreme clockwise position (showndotted at |15) the tape guideway is adapted to be contiguous to the corresponding tape guideway of the sensing portion of the transmitting unit 23. Perforator unit 22 is capable of rotating in a clockwise direction to its dotted position indicated |15, and when its extreme clockwise position has been reached, a loop of tape between the perforator unit 22 and the transmitting unit 23 will be formed provided the speed of operation of the perforator is greater than the speed of operation of the transmitting unit. Then, if the perforating operation ceases and transmission continues, the loop of tape will decrease in size, as it is taken up by the transmitter, until the tape becomes taut between the dotted position |15 and the transmitter 23, whereupon .the perforator 22 will be drawn toward the transmitter 23 until perforator 22 assumes a position |14 contiguous to the transmitter 23 so that the last code combination perforated by the perforator 22 will be sensed and the corresponding signal transmitted. In moving to position |14, the movement of the perforator unit 22 will open a contact |16 (Figs. 1 and 15) in the circuit of the transmitter control magnet 234 to de-energize said magnet to stop transmission. Upon resumption of the perforating operation, the perforating unit 22 will be forced away from the transmitting unit 23 by the first tape stepping operation due to the rigidity of the short portion of tape obtaining between the perforator 22 and the transmitter 23.

The transmitting unit 23 comprises a sensing portion and a transmitting portion. In the embodiment shown in Fig. 1, the sensing portion is fixed and comprises a channel shaped frame member |8|, supported at its lower end on a rod |82 mounted in a bracket |83 carried on the base portion 25 (Figs. 1 and 8). Frame |8| is supported at its upper end on a rod I 84 also mounted in the bracket |83.

Cooperating with ratchet wheel |92 is a feed pawi |96 (Figs. 1 and s) which is pivotany attached to thehormontal armof a bell; crank lever f9.1 mounted on a pivot shaft` I 98'.- Thedepending arm |99 of lever |91 cooperates witha tape feed cam 20| (Fig. 3) integral with a cam sleeve 202 operatively-*associated with the transmitting shaft 2031. Pawl |96 is normally biased' into engagement with ratchet |92 by a spring 200i The" sensing elements' or pins |81' are integral individually with a corresponding series; of sensing fingersI 204'. The lower ends of sensing fingers' 204- are provided' with open ended' slots toastraddle the shaft |82, whereby the sensing iinger 204 is guided for' vertical reciprocation. The sensing fingers 204 are also slotted in the side thereof' to accommodate the endsv of' the horizontal' arms of a series of bell crank levers 205; one individual to each sensingY finger. Each 'of the bell crank levers 205. is provi-dedv with a depending arm 205 which cooperates with the horizontal arm 201 of a bell crank lever 208 (Fig. 1). Fastened near the end of each arm '200A of each bell crank lever 255 is a. retractilespring 209", which serves' to rotate its respective bellV crank in a counterclockwise direction (as viewed in Fig. 1)' and to move the associated sensing nger 204 vertically to cause the sensing elements |81 to sense the perforations in the tape If a perforation is presented above a sensing element |01,` the sensing. finger moves vertically to its fullest extent, whereas if there is no perforation in vertical alignment therewith, its upward movement is correspondingly restricted., The depending arms 20S of the bell crank levers 205 cooperate with the slot in a pivotally mounted guide combV 2| Guide' comb 2|| is normally under the tension of a spring 212:, oneend of which is fastened to a spring post 2|3 and the other secured to ears 2|4 (Figs. 1 and 3). Stop screws 2|5 are provided in ears 2|4 toradjust the movement of comb 2| I. Depending from the pivot shaft |98v isan arm-216, the lower extremity of which fits into a slot in a comb member 2| I. Arm 2I6 is alsoy provided with a cam follower projection 2|1- which cooperates with a cam 2|8 integral with the cam sleeve 202 (Fig. 3).

Comb member 2|| is normally biased. in a clockwise direction by springs 2| 2 which, acting through arm ZIS, hold cam follower 2|1 against the periphery ofA cam 2|0. Comb member 2|| also acts under the tension of springs 2|2 to hold bell crank levers 205 in their clockwise position (shown in Fig. 1) in blocking relation with arm 201 of transmitting levers 208, tensioning springs 209. Upon the rotation of cam 2|8, the apex thereon (not shown) coacts with a follower 2|1 to impart counterclockwise rotation to arm 2|0, which in turn imparts like rotation to comb 2||. When comb 2|.I is thus rotated, the bell crank levers 205 are thereafter free to rotate in a counterclockwise direction, also, under the influence of their respective springs 209. However, whether or not the bell cranks 205 will thus respond to the pull of their springs 209, will depend upon whether an obstruction is encountered by the tape sensing elements 181. That is, if a perforation appears in the tape above a sensing element |81, that sensing ringer 204 will be permitted to' rise into theI codel perforation, thus permitting the bell crank lever 205 to rotate a; predetermined amount underI the inuence of. its spring 209A so that the. depending arm 206., is moved out of blocking relationwith arm 201 of the transmitting lever 200. On the. other hand, if no perforation is in register with the tape sensing finger 204', thatbelli crank' leven 2051 associated therewith will not.; be permitted to rotate,` and hence the. depending' armY 205 thereof will re.- main. in blocking relation vwith an 'associated arm: 201i..

As previously mentioned', there is individuall to each of the. bell crank levers 205- a bell crank lever 208, pirated. on a shaft: 22| and heid' in proper.- spaced position by spacingr Washers. Each bell crank 208 has a hook' 222y at itsv upper end.` which engages the insulated upper end of the: spring contact 223y and each of the latter cooperates. with a contact spring 224, the pairs of contact springs being mounted upon, but insul'ated. from, a. supporting; bar 225 carried by they transmitter bracket 22E, mounted on the base. 25.'

Each spring contact 223 tends to engageV its associated contact spring 224, and also' serves toA hold a lug 221 on. the horizontal arm 2011 of theY correspondingbell crank. lever 208 (when free to rotate counterclockwise) in engagement with the surface of an. associated transmitting cam 228. Each of the cams 220y isv provided with a recess 229, so that as the recess passes over the lug' 22T the associated

switch contactsy

223 and 224 willv be closed, provided the horizontal arm of' the bell crank lever 208 is not restricted in its-f movement bythe blocking arm 200. The cams 228' are.- somounted on the shaft. 203 that the. recesses4 229 are arranged in a helical series, so that as the cam sleeve 202 is rotated, the lugs 22'!` and recesses 229 cooperate successively to cause the

contacts

223 and 224. to close sequeny .tially.

Power' is communicated to shaft 202I by' the motor: 8! which, as previously described,.drives the cross; shaft. 14 lthrough gears 11' and 18. Shaft 14 carriesa pinion gear-229- which meshes with a gear: 23|, xed tothe transmitting shaft 203. Gear 23| drives cam sleeve 202 through a positive clutch, indicatedgenerally as 233, which described in detail in` the afore-mentioned Lake Patent No. 2,262,012, and to which patent lreference may be had for a complete disclosure of this clutch arrangement. Asl mentioned in the latter patent, this clutch is of the single revolution type and is controlled by an electromagnet 234. As shown in Fig. 15, the winding of' the clutch control magnet 234 is in series with the contact |16 controlled by the pivoted perforator 22, so that when the contacts |16 are closed, which occurs during the operative period oi the perforator 22, the magnet 234 will be energized to attract its armature to withdraw the clutch arm from the driven portion of the single revolution clutch 233, whereby the driven portion will be urged toward the driving portion to eilect'the rotation of the sleeve 202. Conversely, when the perforator 22 has ceased operating and has been advanced to the point |14 contiguous to the transmitting portion 23, contact 15 will be opened and the clutch release magnet. 234 will beV de-energized thereby releasing its armature and effecting the withdrawal of the driven portion of the` clutch 233 from the driving portion in the manner described in the aforementioned Lake Patent No. 2,262,012.

. General operation e Referring to'Fig. 1, let' it be assumed that all ci the code combinations previously perforated in the tape 5| haveV been transmitted and that theperforating unit 22 has been moved to the cam .sleeve 202.

position shown in dotted lines at |14, where the tape exit channel of the perforator is immediately adjacent to the entrance channel of the transmitter unit 23. Under such circumstances, contact |16 is opened and'electromagnet 234 is deenergized, which results in the arrestment of Also, the clutch controlled by the clutch release mechanism |33 for operating the shaft 43 of the perforating unit is also in its rest position preparatory to being released by the depression of a key lever 26. The condition of the feed hole punch unit 2| is such that the `shaft 1| is constantly rotating, thereby reciprocating the bar 66 to produce feed perforations in the tape until a loop of tape has been formed whereby the lever 95 is rotated to its. counterclockwise position blocking further movement of the bar 59. Upon the operation of a key lever 26, the punch interponents 35'are set in a charac- Ateristic code combination corresponding to the particular key lever depressed. Also, the clutch release mechanism |33 is operated to initiate onehalf revolution of the cam sleeve |23 for the performance of'one cycle of operation of the perforator 22, In response to the rotation of cam sleeve |23 the perforator punch hammer 36 is operated by the mechanism shown in Fig. 14 to produce the perforations in the tape. Thereafter the rectilinear feed mechanism is operated, as previously described, to step the tape forward one step. In so doing the tape causes the perforator unit 22 to be pushed away from the transmitting unit 23 and to close the contact |16.

Sensing fingers nd a perforation in the tape or not, thus setting the arm 206 in blocking or nonblocking relation with the arms 201 of the transmitting levers 208. Then, as the cam sleeve 202 rotates, the contacts 223 will be operated successively to transmit a series of signals over the line (Fig. 15) corresponding to the particular code combination sensed in the tape.

It is understood that as soon as a row of perforations is perforated in the tape as the periorator assumes the dotted line position |14, it is immediately sensed by the sensing fingers 204 after the tape has been advanced one character space, since it 'is an object of the invention to transmit the last signal perforated in the tape. Since the perforator 22 operates at a greater speed than the speed of transmission, the perforator 22 will advance toward the right or pivot to the position shown at |15, whereafter, a loop of tape will be formed so that upon cessation of operation of the perforator, the transmitter will continue to operate until the pivoted periorator unit 22 has been pulled up to the transmitting unit 23 to transmit the last character perforated in the tape, whereupon the contact |16 will be opened to effect the de-energization of the magnet 234 to stop transmission.

as being fixed. Of course, it is contemplated that a pivoted transmitter such as shown in the Lake PatentNo. 2,262,012 may be substituted for the fixed transmitting unit shown in Fig. 1. Accord- Lingly, in Fig. 2 is shown this combination, wherein a pivoted transmitter unit is employed -in conjunction with the pivoted perforating the present invention. y

In the event that the pivoted transmitter, as

unit 22 0f shown in said Lake patent, is substituted for the.

fixed transmitter or sensing unit 23, the pivoted unit is caused to be so mounted as to pivot about the point of articulation between the horizontal arm of the bell crank 205 and the sensing ilngers 204 (which compares with the point of connection between the sensing iingers |25 and bell crank horizontal arms |66 shown in Fig. 1 of said Lake patent). The rectilinear feed mechanism for the transmitting unit will be as shown in said Lake patent in Figs. 9 to 12 thereof, and operating cams for this rectilinear feed movement Will be added to the cam sleeve 202 in proper position in correspondence with similar positions shown in the Lake patent. i

While the invention has been disclosed and described with reference to a particular type of apparatus, it is obvious that it may be applied to other forms of apparatus without departing from the spirit and scope of the present invention. It is accordingly intended to cover all applications of the present invention which come within the purview of the appended What is claimed is: Y 1. In a telegraph apparatus, a transmitter, a. pivoted perforator oscillatable to and from said transmitter and eifective to store signals in a control tape to control said transmitter, said perforator including pivoted punch elements and associated punch interponents` and a selector claims.

vmechanism eiective to control said interponents selectively irrespective 'of the pivoted position of said punch elements to effectuate the storing of corresponding code signal combinations in the tape.

2. In a telegraph apparatus, a transmitter, a pivoted perforator oscillatable to and from said transmitter and eiective to store signals in a control tape to control said transmitter, said perforator including pivoted punch elements and associated punch interponents, a selector mechanism effective to control said interponents selectively irrespective of the pivoted position of said punch elements to effectuate the storing of corresponding code signal combinations in the tape, and rectilinear feed mechanism eifective in timed relation with the punching of the tape to step the tape in a tape feeding direction.

3. In combination with a strip perforator in'- cluding code punches, a pivotally movable frame supporting said punches, means for controlling the eiectiveness of said code punches, selector mechanism effective in any pivoted position of said punch elements for controlling the selective setting of said means, means controlled by said selector mechanism for operating said code punches inaccordance with the operation of said iirst mentioned means to perforate a strip with transverse rows of perforations and feed said strip, and means for causing the movement of said frame under predetermined conditions of said strip- 4. In a telegraph apparatus, a transmitter, a perforating means including punch members and interponent elements therefor, a pivotally mov'- 'able frame supporting saidpunch members, said frame being pivotable with respect to said transmitter to render said perforating means effective vto store signals in acontrol tape to control said transmitter, and a selector mechanism effective to control said interponents selectively irrespective of the pivoted position of said punch elements to eiectuate the storing of corresponding code signal combinations in the tape.

5. In a telegraph apparatus, a transmitter, a perforating means including punch members and interponent elements therefor, a pivotally movable frame supporting said punch members, said frame being pivotable with respect to said transmitter to render said perforating means effective to store signals in a control tape to control said transmitter, a selector mechanism effective to control said interponents selectively irrespective of the pivoted position of said punch elements to effectuate the storing of corresponding code signal combinations in the tape, and rectilinear feed mechanism effective in timed relation with the punching of the tape to step the tape in a tape feeding direction.

6. In combination, perforating instrumentalities, a pivotable frame supporting said instrumentalities, interponents for controlling the eiectiveness of said instrumentalities to produce perforations in a tape, a permutation selector mechanism eiective irrespective of the pivoted position of said punch elements for controlling the selective setting of said interponents, and rectilinear feed means eiective irrespective of the position of said frame to step the tape in a tape feeding direction.

ROSS A. LAKE.