US2126647A - Typewriting machine - Google Patents

Description

um@ 9 W3., W. s. LEMMON TYPEWRITNG MACHINE Filed Nov. 24, 1954 ATT RNEY INVENToR. b1/6g f 1 BY v Patented 9, 1

I UNITED STATES PlvrisN'rC OFFICE i claim. (ci. loiLeol This invention relates to automatically operated typewriting machines, and the principal ob- ,ject of the invention is the provision of simple and inexpensive means for selectively controlling theopei'ations of the machine by means of an indicia record control means, or manually from the key board in the usual manner.

In this disclosureof the present invention for purposes of illustrating. the principle of operation one type of indicia record control means will beembodied, and which is in part in the form of an tape, sheet, or ribbon on which characters or other indicia to be reproduced are represented by perforations to selectively operate the associated translating mechanism, one form of which as shown may be a conventional power operated typewriter.

It is an object of the present inventionto provide sensing means to cooperate with the indicia record control means in such a manner that when a particular f orm of indicia is sensed, a circuit corresponding to the said indicia is energized to further control the associated translating mechanism. Y

Further and other objects of the present invention will be hereinafterset forth in the accompanying specification and claim and shown in the drawing which by way of illustration is what I no w consider to be the best mode in which I have contemplated applying that principle. Other embodiments of the invention employing' vthe same or equivalent principle may be used and structural changes made as desired by those skilled in the art without departing from the present invention vand within the spirit of the appended claim.

In the drawing: Y

Fig. 1 shows a transverse sectional view of so much of a typewriting machine as is necessary to illustrate a preferred embodiment of the inventlon. l

Fig. 2 shows a diagrammatic circuit diagram illustrating the preferred embodiment of the invention.

Typewriter mechanism Referring now to Fig. 1, in the embodiment illustrated in the drawing, well known means are provided for actuating the type bars by power operated devices comprising a power driven roller Iii.

A cam ii is pivoted on one arm of a bell crank lever l2 pivoted in the frame, the other arm oi which is operatively connected with one arm of a bell crank lever il by means of link Il. The

monV rod 2B and linked to the solenoid i8. It is erated thereby. The engagement of the cam ll with the power roller is controlled automatically by means of the solenoid i8 connectedfto the key bar Il by link i9. The cam il is resiliently engaged by a spring-pressed arm which tends to turn it into engagement with the power driven roller or a stop 2i on a lever 22 pivoted on the bell crank I2 and normally arranged in the path oi a lug 23 on the cam.

When the lever 22 swings to move its stop out of the path of the lug, the arm 20 swings the cam into engagement with the power roller to .be actuated thereby to swing the bell crank i2 to actuate its connected mechanism. The lever 22 has an arm 24 which is provided with an oilset projection 25 at its end which projects laterally through an opening in the bell crank I2 and engages the bifurcated lower end 26 of an arm 21 of a key lever` i'l pivoted on the comobvious then that energization of solenoid I8 in causing a key lever I1 to be depressed releases the revolubly mounted cam Il to engage and be actuated by power roller Il in turn operating bell crank I2 and its attached links to cause the associated mechanism such as the key bars or case shift mechanism to be operated.

It will be understood that the usual number of type bars and associated devices for' operating them may be employed, although only one of them is illustrated herein for the sake of clearness. 40

Sensing mechanism Itwas mentioned that automatic controlling means for selective operation of the typewriter is provided which in the preferred form is shown as va master sheet or roll Il on which characters or other indicia't be translated into typewriting `are represented'by perforations 3i (Fig. 2).

The perforations are formed by any suitable means and are provided on a sheet or roll wide enough to contain a longitudinal series of perforations, evenly spaced. forthe control of each element of the machine to be operated, namely the solenoids Il of the typewriter.

A sensing mechanism is provided to cooperate.

when a particular perforation is sensed, a circuit corresponding to the represented character is energized to control the typewriter accordingly. The following brief description is sufficient since a more complete disclosure of the sensing device is made in my copending application Serial No. 743,208, flied September 8, 1934, and which as shown is provided with a horizontal transverse conducting roller 32 which supports and feeds the elongated perforated sheet 33. A plurality of sensing brushes 33 are positioned so as to enable them to cooperate with the feed roller 32 when a perforation is sensed. 'Ihe sheet 30 is wide enough to contain a longitudinal series of evenly spaced perforations, the position of a single perforation on the sheet indicating the particular character representation. 'Ihere are provided as many brushes 33 as there are perforation positions, that is, an individual brush for each perforation which-is representative of a character or other indicia.

Therefore when the sheet is fed continuously to the sensing device'by suitable means, such as motor 34, and when the particular brush 33 senses its corresponding character perforation a controlling circuit will be completed to control` the operation of the typewriter which will be described hereinafter.

Case shift mechanism It is necessary to note at this time the provision made for operation of the carriage shift key of the typewriter. In order to record both upper and lower cases, it is obvious that the shift key must remain in its designated or predetermined position for that period during which the corresponding type of recording is desired; for example, as is usually the method, when upper case is desired the shift key must remain depressed for that particular perior of upper case typing. 'I'he following is what is now considered the preferred method of effecting this procedure. The carriage shift sensing brush 33a upon engaging a perforation in roll 30 indicating -a desired shift of typecase causes energization of magnet 40 to cause the cam wheel to be rotated so that its high surface forces contact blade 42 into engagement with contact 43, which is fully described in my copending application Serial No. 746,489, filed October 2, 1934, keeping said contacts closed to effect a carriage shift which operation will be explained hereinafter. 7

The carriage shift mechanism remains in the operated position so long as contacts 42 and 43 are closed. Upon reception of another impulse energizing magnet 40 cam wheel 4I is stepped ahead to permit contact blade 42 to engage a lower surface of the cam wheel to disengage the contacts 42 and 43, thereby restoring the carriage shift mechanism to its normal printing position. Since ratchet 44 is provided with two times the number of teeth as there are highV surfaces on cam wheel 4I, it is obvious that a single operation of magnet 43 will cause contacts 42 and 43 to close and a second energization of the magnet will permit them to resume the position they occupy in the figure.

Operation Upon closure of the switch 35, motor 34 is energized by the circuitincluding grounded battery 36, to rotate the feed roller 32 which is adapted 'to introduce the perforated sheet 30 between the brushes and conduct/ing roller 32. The individua-1 with the perforated sheet in such a manner that brushes 33 are connected to separate solenoids I3 and as mentionel hereinbefore adapted to sense a particular perforation column or position all of which represent the same corresponding character, that is the separate brush, its connected solenoid and the corresponding perforation column adapted to be sensed. Individual brushes 33 and the connected solenoids I3 and perforation positions are provided for each character representai tion.

Therefore the brushes 33 upon sensing the particular corresponding perforations 3l engage conducting roller 32 to complete circuits whereby current from grounded battery energizes solenoids I3 through contacts 45 closed at each sensing operation, by virtue of the grounded common contact 31 adapted to engage the roller 32 con tinuously.

Energization of solenpid I8 causes its corresponding key lever I1 to be depressed to release the cam II and then actuated by power roller III to rotate the cam a half revolution which causes the bell crank lever I2 to operate its connected type bar, recording the character represented by the sensed perforation on sheet 30.

A cam wheel 43 is shown fixed on the conducting roller shaft, the purpose of which is to cut off the current from battery 36 to the solenoids I3 whenever a perforation isvsensed and before the edge of the perforation is reached by the sensing brush. Instead of deenergizing the energized solenoids I3 when the brushes 33 leave the perforation and are separated from the conducting roll 32 by the perforated sheet 30, the cam wheel 43 is adapted to break the contacts 45 before the brushes 33 are disengaged from the conducting roll by the said sheet. 1

The cam wheel 43 is preferably an insulated member similar to cam wheel 4I and adapted to have its lower surfaces 41 so arranged on its periphery that when rotated synchronously with feed roll 32 by motor 34 they permit the contacts 43 to be engaged at the same moment the brushes 33 sense their particular perforations. It was mentioned hereinbefore that the perforations 3| are evenly spaced so that the camming surfaces can be so positioned to be in synchronism with the sensing of the perforations. Before the brushes 33 disengage from the conducting roll 32 or in other words before the perforations are advanced to separate the brushes from the conducting roll, the high surfaces on the cam'wheel 43 open the contacts'to break the established circuit 'from grounded contact 31, conducting roll 32,

. brush 33, solenoid I3, contacts 41 to grounded battery 33, deenergizing the said solenoid.

yfrom grounded battery 38 to energize solenoid Ila which is connected to theshift key of the typewriter. The key shift solenoid remains energized until another shift perforation is sensed to energize magnet 40, and obviously maintains .the shift key depressed to render the typewriter shift mechanism operative until the second energization of magnet 40 to disengage the contacts 42 and 43 to deenergize solenoid Na restoring the shift mechanism to normal position.

lt is obvious that any number of typewriters can be operated at one time by having the corresponding solenoids of the additional machines connected, for example, in multiple to the cor- `responding circuits connected to the sensing brushes as shown in-the vvdotted section in the I yfigure.

The operation of the control or master roll 30 is controlled by means of a manually operated switch 35 so thatits operation may be stopped when desired, and the machine operated manually when any insertion or additional matter is to ,be recorded. During such operation the bell crank substitutions and changes in the form and detalls of the device illustrated and in itsoperation mayr be madej by those skilled in the art without departing from the spirit of the invention. It4 is. the intention therefore to be limited only asindicated by the scope of the following claim.

What is claimed is as follows: y

In a typewriting machine comprising a case shift instrumentality, control means therefor and connected thereto, the combination of a perfov rated record control sheet, sensing means com-` prising individual brushes cooperating therewith.

electromagnetic means controlled by one of said` l sensing brushes and adapted to control the operation of said instrumentality control means, and means comprising cam controlled contacts connected to said instrumentality control means to render said instrumentality operative and inoperative upon successive energization of said 20 electromagnetic means.

' WALTER'S. LEMMON;

Images