US2686829A - Preselecting tool for teletypewriters - Google Patents

Description

17, 1954 H. w. BILLARD ET AL 2,686,829

PRESELECTING TOOL FOR TELETYPEWRITERS Filed June 22, 1951 3 Sheets-Sheet 1 FIG. 3

INVENTURS H. M BIL L ARD E. C. BRUNO/16E B) ATTORNEY Aug. 17, 1954 H. w. BILLARD ETAL 2,686,829

PRESELECTING TOOL FOR TELETYPEWRITERS Filed June 22, 1951 3 Sheets-Sheet 2 wvavrms HIV. BILL/1R0 Arrok/uis'r Aug. 17, 1954 H. w. BILLARD ET AL 2,686,829

PRESELECTING TOOL FOR TELETYPEWRITERS Filed June 22, 1951 3 Sheets-Sheet 3 FIG. 6

INVENTORS H. W. B/LLARD E. C. BRUNO/16E Arrdm/EY one wherein the .machine actuate selector Patented Aug. 17, 1954 PRESELECTIN TELETYPE Harold W. Billard, He

Brundage, New Brig mpstead, hton, N

G TOOL FOR WRITERS and Edgar C. Y., assignors to Western Electric Company, Incorporated, New

York,

1 Claims.

This invention relates to tools for use in adjusting and repairing signalling apparatus and more particularly teletypewriters.

There are two general types of teletypewriters, message is printed on a tape while in the other it is printed on a page taken from a roll of sheet material. In each machine there are selecting mechanisms which when func- Y., a corporation Application June 22, 1951,

of New York Serial No. 233,093

levers are employed, although in one type of machine the Televers, normally responding to the marking and spacing pulses, act directly on per- T-levers in the other vanes which operate their respective bell crank levers to shift the code bars to bring about the desired functions.

In the past to repair or adjust teletypewriters moving the selector magnet armature, the transfer levers, the cam-operated bell crank levers, the T-levers, and the code bars including in one machine also the selector vanes and their respective bell crank levers operating the code bars. The accuracy of the movement of these parts distances comparable to their distances of movement in actual operation and the adjustments required, depends upon the experience and ingenuity of the individuals.

An object of the invention is to provide a tool which is small in size, readily attachable to teletypewriters and highly efiicient for actuation to. operate the selector mechanisms to perform all the operating functions of the teletypewriter.

With this and other objects in view the invention comprises a tool for use in adjusting and repairing teletypewriters wherein mechanisms include pivotally supported T-levers actuable singly and in varied combinations to select any of the operating functions of the teletypewriters, the tool including a support removably attachable to the teletypewriter and provided with selective levers pivotally carried by the support and arranged so that they will engage their respective T-levers and operate them to carry out all of the operating functions of the teletypewriter.

Other objects and advantages will be apparent from the following detailed description wherein:

Fig. 1 is a top plan view of the tool;

Fig. 2 is a side elevational view of the tool with one of the levers operated, portions of the tool being shownin section; 1 I I Fig. 3 is a sectional view taken along the line mediate washers I04.

The opposing end of the support I00 is provided with a threaded aperture I06 to receive a stud I01 which extends through aligned apertures of the spacers I03 and the auxiliary support I00. The stud I 0'! acts as a pivot for five selective levers III, H2, H3, H4, and H5. Through the aid of alock washer H6 and a thumb nut I I! on the outer threaded end of the stud I01, the support I00 and the auxiliary support IOI may be forced toward each other tending to clamp the levers and their spacers in close engagement with each other, creating frictional forces capable of holding the selective levers in any position but not to interfere with the manual actuations thereof.

The ends of the levers adjacent the pivot or stud I01 are identical in structure, they being provided with the projections I I8 as illustrated in Fig. 3. The other ends of the levers are similar in contour but variable in length so that their handles I20 will be disposed in staggered relation with respect to each other as illustrated in Fig. 1. The handles in the present embodiment of the invention bear numerals l, 2, 3, 4. and 5 to identify the levers III to H5, inclusive.

The tool is provided with thumb nuts I22 normally held against displacementby a bracket I23 which is fixed to the support I00 and provided with split apertured ends I24 to receive the reduced ends. Furthermore, the support I00 is apertured in any suitable manner to receive mounting studs of teletypewriters so that through the aid of the thumb nuts I 22 the tool may be removably secured to the teletypewriter.

Attention is now directed to Sheet 2 of the and 5. These figures are enlarged fragmentary illustrations of one species of teletypewriter shown in Fig. '7 of the patent to Morton et al., 1,745,633. The two digit numbers identifying parts of the teletypewriter are identical with the reference numerals found in Fig. '7 of the above patent. In the selecting mechanism shown, the bell crank lever IT is cam-operated to act upon the selecting finger i2 which normally controlsthe T-lever S'Landlitsrespective permutation or code bar 38. There are five sets of selecting mechanisms, leading to five code bars 33, which include T-levers 31 spaced from each other on alcommon pivot 42 distances similar to the spacing 01. the selective levers H l to I I5 inclusive of the tool.

The permutation or code bars ifisrmay be shifted from one position to another controlled .by elongate apertures 4l receiving-a pin -39. The code bars are notched along their innersurfaces, 'the notches being so arranged thatithevactuationwof the T-levers 3T, singly and in varied combinations, will result in aligning given groups-of notches to permit actuation of various mechanisms to bring about certain functions tof :.the machine includingprintingof any of the letters, numbers, or characters. The T-levers 3l; are disposed in .a given :order. so that when the toolis mounted onthe machinethrough the securing ;of the'thumb nuts l'22= torconventional-rstuds l of the teletypewriter, it will be known that the selective levers will be: positioned to 1 actuate any one: of the known T-levers. For example, when the operator moves the selective lever with a handle :bearingxthe number 1, he WillazknOW that the "top T-lever :of the selecting mechanism or" the .teletypewriter system: for each teletypewriter is known by the repair man an'd,rif not known, a chart bearing the code may be present beforeihim. .The opera torima'y then;through the aid-of the tool,-.mo"ve the selecting mechanisms throughtheir operating cycles to carry out-every, function of the teletypewriterywatching themovement :of the various parts :and making the necessary adjustments.

sflhespecies of teletypewriters shown in Fig. 6 iszof. the pageprinting typeshown in the patent to S;:Morton 'et-al., 1904,15 2. The-tool is illustrated as' being mounted cnzstudsl'l and 18 in Fig. ,28 ofithis patent. The two digit numbers in "Fig. '6 correspond *with the reference numerals in Fig. 28 of the .last mentioned "Morton et al. patent. In'this structure it will beqapparent thatathe Televers-Zfi are-mounted on .a' common-pivotSl in spaced positions corresponding to the spaning ivof'ithe selecting levers l H to i 15 inclusive so that-,when-thetool is mounted: on the teletypewriter as shown, the ends1|8=ofthe selective levers-will engage their respectiveT-levers 29. Inthis species of telety ewriter the -,T-levers are .ldefinite parts of-the selective mechanisms although they do not act directly on the vpermutation or icodeibars, their actuations being translated to the code bars'through.selectorwanes and bellxcrank levers as shownin Fig. l of the above patent.

IWith ieither'speciesuof the teletypewriterzthe tool, which .is normallyapproximately half the size shownin :Fig. l, may be-readily carried by .the person designated to "repair or-adjust'the tel'etypewriters, the tool being ready. at .all times for mounting on -either species of teletypewriters. Furthermore, the moment the tool .is mounted in place, its selective leversare automaticallypositioned with respect to the 'T-levers of thexselective mechanisms 01 the machines'tobe adjusted or repaired. By actuating the selective levers"! H to H5, inclusive, singly aridintheirzvariedcombinations, the-operator may observe the -actions has been operated. :Thecode of all of the parts of the teletypewriter including the selecting mechanisms and the printing mechanisms and make any adjustments which may be needed. When their adjustments have been completed, the tool may be readily removed from the teletypewriter :and transported: to1 another needing repair.

It is to be understood that the above described .arrangements are simply illustrative of the application .of the principles of the invention. Nu-

merous other arrangements may be readily devised by those skilled in the art which will em- ;bodytthe principles-of the invention and fall within the :spiritand scope thereof.

1.-A*'tool'-foruse in adjusting and repairing teletypewnitersmherein means are embodied to operate pivotally supported T-levers to actuate mechanisms singly and in varied combinations to select any of the operating functions of the teletypewriters, .the stool comprising .:a ssupport, means :torremova-bly; secure the supportiltoia teletypewriter adjacent the f'Tlevers,can,d selective levers zpivotally carried-by: the support: and: positioned to engage and actuate :their. respective Televers independently. :OfHSa-id means? to :operate them whereby saidmechanisms will be actuated at:.any-.idesired speed to :selectiany of the operating tunctionsofxthe teletypewriter;bycmovement ofithe selecting leverszsinglyzand in variedcombinations to .actuate zthe "T-levers of the said mechanisms.

.12.. A: tool for use in adjusting and repairing teletypewriters wherein means i are embodied to operate pivotally supported "T-levers to actuate mechanisms singly and variedcombinationsito select any of the: operating functions :of the-teletypewritersathetool comprising a-.support,- means to removably secure the :supportzto 1a teletypewriter z-adiacent :the Ti-levers, selective levers pivotally carried by .theasupport andtpositioned to engage their respective fT-levers, and handles for the selectivelevers :markedtto identify them and their respective'iT' levers whereby the, mechanisms may; be. :actuated :at :any: :desired speed: to perform'anyof thetunctionsof the teletypewriter by movement :of the selectivel.-levers bytheraid :of their handles'xsingly and in variedxcombinations to actuatehthe IT-levers ofthesaidemechanisms independentlywof said meansto .operatezthem.

3. Ai tool 1 for :use in adjusting and repairing teletypewriters wherein z-means are t embodie.d::to operateflpivotally zsupported 'T-.leversi .to .actnate mechanisms singly and :in varied :combi-nationsto selectiany-of the operatingfunctionsofrthe teletypewriters, the tool comprising a support;;mea-ns to removablysecure the supportrto 1a teletypewriter adjacent the 'fT-elevers, selective levers pivotally, carried :by the support: and ipositionedto engage their respective 'ZF-IBV8I'S, :spacersr-interposed betweenthe selective levers to locate them in like planes with their T leverspand'handlesfor the selective :levers marked? to identify them-and their respective T -levers whereby the .:mechanisms: may :be actuated-at any desired speed to perform any of the f-unctionsofthe teletypewriter by movement- :of theselective :leversrby the. aaidzoi their'handles singlygand varied-.combinations to actuate the :T-rlevers of the-said-mechanisms independently 50f said "means to ioperatetthem.

4 A ,tool for use in adjusting (and repairing teletypewriters wherein means are" embodied, to operate1pivotally-supported ,T-levers-to actuate mechanisms; singly w and in varied combinations, to select any of the operatingtunctionsiofntheitelewhereby actuation of the said mechanisms will be operate them, and means applying a, holding force to each of the selecting levers to hold them and the mechanisms including their T-levers in operated positions.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 10 2,394,765 Hagelin Feb. 12, 1946

Images