US1755281A - Typewriting machine - Google Patents

Description

I A iil'zz; 1930.

VON REF-PERT TYPEWRITING MACHINE Filed Sept. 25, 1927 2 Sheets-Sheet 1 INVENTOR:

A ril 22, 1930. a MO'N REPPERT 1,1 5 2 1 TYPEWRITING MACHINE Filed Sept. 23, 1927 2 Sheets-Shet 2 mvzmon;

Patented Apr. 22, 1930 v UNITED STATES- PATENT OFFICE RICHARD voN REIV'PER'I, F HARTFORD, CONNECTICUT, ASSIGNOR r0 UNDERWOOD ELLIOTT FISHER COMPANY, OF NEW YORK, N. Y. A CORPORATION OF DELAWARE TYPEWRITING MACHINE This invention relates to power-driven typewriting machines, and more specifically upon my pending application, filed Septemto that class of machines where power-driven electromagnetic forces are employed to drive the type-bars to. a typing position following a partial depression of the associated key-levers. I

The present invention is an improvement ber 15, 1927, Serial No. 219,607, where the semi-depression of a key-lever vibrates an armature, pivotally suspended therefrom to be shifted into the magnetic field of a constantly-rotating magnetized actuator, and, through the magnetic attraction or cohesion of the armature tothe rotating actuator, completes the depression of the key-lever to a predetermined point Where the magnetic control of the actuator is severed in advance ofthe typing movement, to free. the key-lever which responds to the tension of itsrestoring spring. \Vith driving means of this character, itis difiicult for an operator, accustomed to manipulating; the keys by a firm .finger-stroke,

to acquire the softer touch of manipulation for the semi-depression of the keys, where' the softest touch of a key Will immediately eflict a clutching engagement with the rotating magnetized actuator, whereupon the key is withdrawn from under the operators finger, and this results in the finger involuntarily following the key in its downward movement, and as a consequence the keys kick back results in a disagreeable shock to the finger.

' The present invention includes a pivoted keylever, a pivoted sub-lever having a positive driving connection with the type-bar, an intermediary member having a driving connection with the sub-lever, and an abutting or interrupted connection with the key-lever, through which connection a partial depression of the keys-lever vibrates the intermediary member into the magnetic'field of a power-driven, constantly-rotating, magnetized actuator where the magnetic attraction between the actuatorand intermediary memher will convey a driving movement to the sub-lever to drive the type bar; said intermediary member interrupting its magnetic attraction with the magnetized actuator, by its throw to release the sub-lever to the restoring influence of its spring and effect the against the positive stop enables the oper-- ator to more quickly withdraw the fingers from the depressed keys and the possibility of double typing is thereby avoided.

There may be times when it is desirable to actuate'the type-carriers in the usual manner by the key-levers and not by the power-driven mechanism. In the present organization of the parts means are provided, which, by shifting of a key-lever stop-bar to an inoperative position, enable the key-levers to first vibrate the intermediary member against the stationary or inactive power-driving elements,

and then manuall depress the intermediary which becomes a key-actuated driver tothe sub-lever the key-lever, the intermediary and the sub-lever being depressed in unison by the finger-impact at the key, to drive the typing element to the typing position of the platen, and the down stroke of the key-lever being checked in the usual manner by the impact of the type-face against the laten and not by the stop-bar. The stopar in the present instance is pivotally supported and shiftable by a suitable finger-piece to operative or inoperative positions, thus providing a convertible control for the machine that instantly renders the machine operable for either a manual or a power-driven actuation of the typing elements.

A further improvement includes providing each intermediary member with electrical characteristics that become automatically effective at the end of a key stroke to release the intermediary from the magnetic cohesive grip of the rotating actuator with a minimum of resistance, so that the separation or release and its connecting and operatingparts that are co-operative with the power-driven magnetized actuator.

Figure 3 is a diagram of the electrical circuits, showing the electrical connections from the motor-circuit through the magnetized actuator.

Figure 4 is a partial front elevation in vertical section, the plane of the left-hand half of the figure being taken between the two upper banks of the keys, and the plane of the right-hand half being taken just in front of the magnetized actuator.

Figure 5 is a reduced longitudinal section through the magnetic actuator, showing the relative engagement of the solenoid-sections and the manner of connecting the two end sections to the ring-commutator.

Figure 6 shows a key-lever depressed to its stop-position which operates to vibrate the intermediary into the magnetic field of the actuator without vibrating its sub-lever connected to the type-bar, the magnetic attraction from this point being effective to fully vibrate the sub-lever to actuate its type-bar.

Figure 7 shows some of the parts of Figure 6 drawn downwardly to a point where the sublever has reached the end of its stroke and the intermediary is about to respond to its r'estoring spring which withdraws the interme-c diary from the magnetic control of the actuator and permits both sub-lever and type-bar to be restored to their normal positions.

Figurg 8 is a modified form of key-controlled connections'to vibrate an intermediary member or armature into the magnetic field of the actuator to effect the depression of a sub-lever operatively connected to throw a type-bar to type, which, for the compact assembly thereof, renders the magnetic powerdriving features applicable to machines having many banks of keys, as in double keyboard typewriting machines, where each key gperates a type-bar having only a single typeace.

Numeral and alphabet keys 10 and 11. when depressed, operate key-levers 12. which. instead of being fulcrumcd upon the fulcrumrod in the usual manner, are individually ful-- crumed at 13 to the rear end of levers 14:, fulcrumed as a series upon a stationary rod 15. Each lever 1 1 has a pin-and-slot driving connection 16 to vibrate a bell-crank 17 about a fulcrum-rod 18 to drive a type-bar 19 upwardly and rearwardly against the platen 20, rotatably mounted within a carriage 21 traveling upon carriage-rails 22 and 23 under the influence of a carriage-motor 24 and con trolledby a step-by-step carriage-feeding mechanism 25, operated by a universal bar 26, vibrated by each type-bar in typing. The levers 12 and 14: may have individual springs 27 and 28 for restoring each lever independently of the other. From this description it will be noted that each type-bar has a pair of depressible pivoted levers arranged side by side, one lever having a key and no driving connections with the type-bar, and the other lever having no key, but having driving connections to the type-bar, and the latter will be designated hereinafter as sub-levers or a type-bar driving lever. To establish typing co-operation between these two levers 12 and 14, the forward end of each sub-lever may be formed with a downward extension 29, provided with an adjustable saddle 30, pivotally supporting an interponent or intermediary member 31, having a short arm 32 to engage the under edge of the key-lever 12, and further provided with a downwardly-extending arm 33 formed with a section 34 bent over at right angles to present a wide flat face.

The series of intermediary members may be held in vertical alignment, when vibrated by their key-levers, by a suitable comb 35, and a working alignment of the intermediary members with. the key-levers will be further secured by a comb 36 at the front end of the key-levers. Each intermediary member 81 is normally held within the comb 35 under the tension of a spring 35 which has a comparatively light tension to permit the vibration of the intermediary member without vibrating the associated sub-lever 14. and the tension of each key-lever spring 27 is also proportionately light, so that only a very light touch of the finger isrequired to manipulate the machine.

To limit the depression of the key-levers and provide a positive stop-rest for the operators fingers in typing. a rock-shaft 37, having a bearing in each side wall of the machine-frame,is provided with astop-bar 38. the upper edge thereof underlying all the key-levers.

The intermediary member 31 may be formed from soft sheet iron having the electrical properties of an armature to be attracted by a magnetized body. which body. in the present instance, includes a series of coils. assembled end to end and enclosed within the metallic sections that take a cylindrical form to become a rotating permanently magnctizahlc actuator for the intermediary niembers, as' fullyv described in my pending application before me'ntioned. The coils 39, i

Figure :3,a're enclosed by metal sections 40 andaltcrnate coils may be wound aridassemQ bl'e'don the' shaft "-11 for oppositepolarities, :indthe series ofsections l maintained upon the shaft 11f betv'teen .suitable heads 42 se- I cured to the shaft.1-lhetrminals 43, of each 'endicoil of theseries are conn'ected to' commutator-ringsTH, insulated from theflheads 42 and providcdwitha brush 45 secured to an:insulator support4G onthe side frames of the machine. 1 To drive-the shaft 41, one

end thereof-may carry a worm-gear 47, driven by a worm 48, secured to a shaft 490i an electric motor- 50. heicircuit ofthe-motor ma'yflb'e tapped to carry an electric current j through a variable resistance 51 to the'two ibrush'es 45, so that whenever-' 'the motor-conv rol switch 52-is closed to' start the motor,

- the-current'will pass-.through'coils '39 and I the'sections win become continuously magfieti'zed during the intelVal tlie'motor is' ac- 'tive iii 'rotating the coils; The shaft'41 and {sectional cylinder 53 may ice-suspended from 1 arms 54', secured to a rock-shaft 55 to form arockable frameor cradle thatis adjustable au i a, a i

" The description up tothispoint' provides fthatthe depression of a key-lever 12 against as a unitfthrough set-screws 56 toraise or.. lower the horizontal axis of the magnetic coils of .the cylinder relative to the armathe stop-bar 38 vibrates the-armature or in tcrm'ed-iary"member into the magnetic field ofthe cylindricalactuator, which, through Q "magnetic attraction,promotes a cohesivegrip upon the" armature, and the rotating face, of the actuator causes 'the armature-to roll ilownw'ard-ly to exert a down pull at the-for- '\\'ard1end' of the sub-lever 14 to Vibrate the "1 a 1 bell-crank 17 type. j r y v 1h iny pending application; the Jarmatu're ei-ativc byfthe throw of the armature to wedge and throw thetype-bar 19 to carries a 'non-magneticfcamthat becomes opitself between tliecylin(l er and the armature and-forcibly separate the la'tter from the Y former, to sever the magnetic "control of the .j'

mingietl'eet" must be'accomplished by the armature "from the cylinder; As this caminertidofthe typing 'e lementsto type. this *animing-oif operation may have-a'retarding "errata-1 m the type-barsand slow down the speedof the machine." To overcomesuch "defects; should they 'befound to exist; the

; "non-magnetic cam isreplaced by a non-magsub-lever and type-bar. p

ithe face of the cylinder the magnetic section ii-t uponthe non-mam netie flat-face section 5? as a continuation of theflat. face 3% of the armature. so that nctiescction 57 with non preciable magnetic itc, v Ml'cct upon the acquired momentum 'o-fz-thc Ithe stop-bar shoe to slide over it'he'face of the cylinder sub-lever let. to actuate the type-bar.

- manually by the keys single type-face,

of a visible-writing.

having their lower organization of said' comb under the tension 'Theifreeaend 67 of -the pushbar 63 is aligined I I of a'key 10f?- 64' and pushes the intermediaryme1nber 68 into the field of the rotary magnetized. cyl

will roll from vi \tancctroin the cyiliiuicr and no rctardiinr lWhen akey-lever'is depressed to the position of Figure 6, the lever is arrested by of the intermediary member or armature 31 is vibrated against the face of the magnetized cylinder Should the keyaleverhave aj .further depression, it .isobviousthat if the cylinderfiiiis stationary,. and consequently demagnetized, the sect on 34 would become a "Figure 1 to provider-for a full typingde pression of the key-levers, and said bar maybe held ineither position by a flat spring v bearing against flat spots on the; shaft a As a, possible modification of the present invention the power-actuating"means may 38 and theface of the section 35L i a semi-depression of be' applied to-fa double keyboard machine where each key operates a type-bar-having a and where the usual power driving mechanism cannot be'applied to the closely-banked connections to the, type-bars Asshown in Figureq8, eight banks of keys, as 10, ma-y be mounted uponkey-stems 60, ends pi votally, secured to arms of bell-cranks 61, arranged to. vibrate upon stationary rods -62. Depression of the keys vibrates the bell-cranks 61,--having con-' nections at their lower ends to the typing ele- 'ments after the manner of;well-known styles of typewriters; For purposes of the present parts; the lower arm of-eacl1 bell-crank' 61 is epivotally connected to the forward endrofa pushbar 63, guided hori and having a zontally through. a comb 64' stop-face 65' to normallyengage the; face of to engage with an intermediarymember 68, pivotally connectedto the sub-lever lhuin a manner already. described. Thejdepressi on slides the bar 63 throughthe comb inder' 53,-th'e depression of the 'key being -1i1n-' ited by a stop face .69 strilring'. thecomb '64,

and: the intermediary memberseparating it self by its throw ofthe c vh.nder, as previouslydescribed,-

of ai sp ringGG.

front-strike machine.

from the magnetic'cohesion i through the non-magnetic member 57;; Thesesimple connections of thin flat metal can readilyhefasscmbled within aframe having a standard ll'lflClllllGWldtll andeight; or more} ba nks of keys.

- in typing;

It will be noted that the semi-depression of the keys is limited by a fixed stop which'is restful to the fingers of the operator and enables the operator to more quickly remove the fingers from the depressed keys; that the pendent armature or intermediary member, having a flat face composed of magnetic and non-magnetic properties or characteristics, will roll through the horizontal magnetic axis of the rotating solenoid until the restoring spring of the intermediary member overcomes the quickly diminishing magnetic forces of the solenoid and without any appreciable opposition to the momentum of said intermediary member and its connected parts and that the rocking of the saddle 30 upon the lever-extension 29, by suitable set-screws, raises or lowers the normal position of the armature 33 and adjusts the relative position of the non-magnetic section 57 thereof to the magnetic cylinder 53, to regulate the extent of magnetic depression of the armature and typebar lever to the throw of the type-bar.

Variations maybe resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination of a constantly-rotating, electromagnetized actuator for a typing mechanism that includes a lever havin a positive driving connection with a typear, a key-lever, and means carried by the type-bar-lever and operated directly by the key-lever, to magnetically connect said type-bar-lever with the magnetized actuator, to drive the type-bar by the magnetic attraction or cohesion with said means.

2. In a typewriting machine, the combination of a constantly-rotating, electromagnetized actuator for a typing mechanism that in cludes a lever having a positive driving connection with a type-bar, a intermediary member having a pivotal connection with the type-bar-lever and operated directly by the key-lever, to magnetically connect'said type-bar-lever with the magnetized actuator, to drive the type-bar by the magnetic attraction or cohesion with said intermediary member.

-3. In a typewriting machine, the combination of a constantly-rotating, electromagnetized actuator for a typing mechanism that includes a lever having a positive driving connection with a type-bar, a key-lever, and a bell-crank-member pivotally secured to the type-bar-lever and having one arm operated directly by the key-lever to vibrate another arm that magnetically connects said typebar-lever with the magnetized actuator, to drive the type-bar by the magnetic attraction or cohesion with said bell-cranlt-member.

4.- In a typewriting machine, the combinakey-lever, and an tion of a constantly-rotating, electromagnetized actuator for a typing mechanism that includes a lever having a positive driving connection with a type-bar, a key-lever normally inoperative to type, and means having adriving connection with the type-bar-lever and aninterruptive connection with the keyle-ver, whereby said means may be presented to the rotating actuator, to drive the type-bar by magnetic attraction.

5. In a typewriting machine, tion of a constantly-rotating, electromagnetized cylinder, a lever having a positive driving connection with a type-bar, a keylever, and an armature having a driving connection with the type-bar-lever and operated by the key-lever, said armature having a flat face engageable with the face of the rotating cylinder to drive the type-bar with a maximum of magnetic attraction.

6. In a typewriting machine, the combination of a constantly-rotating, electromagnetized actuator for .a typing mechanism that iiicludes a lever having a positive driving connection with a type-bar, a key-lever, an armature-member carried by the type-bar-lever and operated directly by swingjinto rolling contact with the rotating actuator and drive, the type-bar by the magnetic attraction or cohesion with said armature-member,

the combinaand means earned by said armature-member that the key-lever to become effective during the rolling contact, thereof with the actuator to type, to release said armature-member from the magnetic grip of the actuator to restore the type-bar.

, 7 In a typewriting machine, the combination of a constantly-rotating, electromag netized actuator fora typing mechanism that includes a lever having a positive driving connection with a type-bar, armature-member carried by the type-barlever and operated directly by the key-lever to swing into rolling contact with the rotating actuator and drive the type-bar by the magnetic attraction or cohesion with said armature-member, and means carried by the armature-member that become effective during the continuous rolling contact thereof with the actuator to type, to release said armature-member from the magnetic grip of the actuator to restore the type-bar, said means including a non-magnetic section of the armature-member that rolls into the magnetic field of the actuator.

8. In a typewriting machine, the combination with a type-bar having a depressible driving lever connected thereto, a pivoted key-lever, and a power-driven, continuouslyrotating, magnetized cylinder, of means connected to the type-bar-driving lever and shiftable by the depression of the key-lever into the magnetic field of the cylinder to actuate 7 said ."l ar-lever to type.

a key-lever, an

tion with a type-bar having a depressible driving leverconnected thereto, a pivoted key-lever, and a power-driven, continuouslyrotating, magnetized cylinder, of means having a driving connection with the type-barlever and shiftable by the depression of the key-lever, said means,.when so shifted by the key-lever, first responding to the magnetic attraction of the cylinder to be subsequently driven by the cylinderto actuate the typebar. 7 Y I v 10. In a typewriting machine, the combination with a type-bar havinga depressible driving lever connected thereto, a pivoted key-lever, and a power-driven,contmuouslyrotating, magnetized cylinder,-of means having a driving connection with the typeebarlever and shiftable by the depression of the key-lever, said means, when soshifted by the key-lever, first responding to themagnetic attraction of thecylinder and then driven by the cylinder to actuate the type-bar, sald means having electrical characteristics operative at a predetermined point of its throw to cut off said means from the control of the cylinder to restore the type-bar lever. I

11. In atypewriting machine, the combination with a type-bar having a depressible driving lever connected thereto, a pivoted key-lever, and a power-driven, continuously rotating, magnetized cylinder, of means hav- I ing a driving connection with the type-barlever and shiftable by the depression of-the key-lever said means, when so shifted by the key-lever,-first responding to the magnetlc attraction of the cylinder and then driven by the cylinder to actuate the type-bar, said means including a section having non-magnetic properties that nullify the magnetic cffeet of the cylinder and release the type-barlever at the end of its typingmovement.

12. In a typewriting machine, the com} bination of. a power-driven,'magnet1zed driver operativethrough' its magnetism to drive the type-bars in typing, levers having driving connections with the type bars, one lever for each type-bar, a magnetic pendent for each lever that normally is spring-pressed out of the range of said magneticdriver, and manual means to vibrate each pendent into the magnetic grip of the driverto actuate the lever and drive the type-bar, said meansineluding a key-lever having an interrupted de-' pression' and an interruptive connection with the pendent.

' 13. In a typewriting machine, the combination of a power-driven, magnetized driver operative through its magnetism to drive the type-bars 1n typing, levers having driving connections with the type-bars, one lever for each type-bar, a magnetic pendent for each lever that normally is spring-pressed out of the range of said magnetic driver, and manual means to vibrate each pendent into the I magnetic grip of'the driver to actuate the- .by said cylinder to actuate the magnetic grip of the driver to actuate the lever and drive the type-bar, said means including a pivoted key-lever having a limited depression and an abutting one-way connection with the pendent, and a stop-bar common to all the key-levers, to limit the manual depression thereof in vibrating the pendents; v

15. 'In a typewriting machine, the. combination of a typing mechanism including a type-bar-actuating lever and a disconnected key-lever, a power-driven, constantly-rotat- .ing, magnetized cylinder, and a magnetic clutch-member having a driv ng connectionv with the type-bar-actuating lever. and an in terruptive connection with the key-lever,

whereby said clutch-member, when vibrated by the ey-lever into magnetic clutching engagement with the cylinder,'will be driven type-bar in dependently of the key-lever. I 1

16. Ina typewriting machine, the'combi nation of a typing mechanism including a type-bar-actuating lever and pa disconnected key-lever, a power-driven, constantly-rotating, magnetized cylinder, and a magnetic clutch-member having a driving connection with the type-bar-actuating lever and positioned to be vibrated by the key-lever into clutching engagement with the magnetized cylinder, said clutch-member automatically separating itself from the magnetic clutch of. the cylinder at the end of the typing movement by its throw. I 7

, 1-7. In a typewriting machine, the combination of a typing mechanism including a sub-lever operatively connected to vibrate a type-bar and a key-lever disconnected from the typing mechanism, an intermediary member having a driving connection with the sub-lever and a depressible connection withthe key lever, and a'poWer-driven, electromagnetized, rotating body, said intermediary member, when presented to the magnetic cohesive forces of said rotating body by the ,depression of the key, will be operative to vibrate the sub-lever and actuate the type-bar to type. 7

I18. In atypewriting machine, the combination oftype-bars, levers positively connected to drive the type-bars, a universal, power-driven, rotatable electromagnetized driver, interponents connected to the type bar-levers and normally out of the magnetic field of the driver, andpivoted key-levers operable to selectively bring the interponents into the magnetic control of the driver, to actuate the type-bar-driving levers independently of the key-levers.

19. In a typewriting machine, the combination of a series of segmental type-bars, a series of horizontally-disposed levers positively connected to drive the type-bars, one lever for each type-bar, a series of verticallydisposed couplers, one coupler hanging pendent from each type-bar-lever, a powerdriven, electromagnetized driver common to all the-couplers, and a series of horizontallydisposed, pivoted key-levers, one key-lever aligned to each coupler and each key-lever operative when fully depressed to selectively vibrate a coupler into the magnetic control of the driver, to actuate the associated. typebar-driving lever. Q

20. In a typewriting machine, the combination of a power-driven, constantly-rotating, electromagnetized cylinder operative through magnetic cohesion to drive the type bars in typing, a pair of leversfor each typebar, one lever having a driving connect'on to the type-bar, and the other lever pivoted to the first lever and having a key, andan in-' termediary member pivotally secured to the type-bar driving lever to be vibrated by the depression of the key-lever intothe magnetic field of the rotating cylinder, to be magnetically attachedthereto to drive the typebar, 21. In a typewriting machine, the combina 'tion of a power-driven, constantly-rotating,

electromagnetized cylinder operative through magnetic cohesion to drive the type-bars in typing, a pair of independently-depressible levers for each type-bar, one lever of each pair having a positive driving connection with a type-bar, and the-other lever having a manually-depressible key, an intermediary member having a pivotal connection to the type-bar-driving lever and swingable by the depression of the key-lever into the magnetic field ofthe rotating cylinder 'to be magnetically attached thereto to drive the type-bar, and a stop-bar to limit the depression of all the key-levers to the swing of the interme-, diary to the cylinder.

22-. In a typewriting machine, the combination of a type-bar mechanism including a type-bar-actuating lever and a disconnected key-lever, a power-driven cylinder operative at will to 'be rotatably magnetized or 'to be stationary and demagnetized, an intermeever and shiftable by the depression of the key-lever into the magnetic field of the cylinder to depress said type-bar lever for a fixed throw of the type-bar in typing, and means to regulate the magnetic depression of the typebar lever to the throw of the type-bar.

I 2st. In a typewriting machine, the combination with a type-bar, having a depressible driving lever connected thereto, a disconnected key-lever and a power-driven continuously -rotating magnetic cylinder,of a pendant connected to the type-bar driving lever and shiftable by the depression of the key-lever into the magnetic field of the cylinder to depress said type-bar lever for a fixed throw of the type-bar in typing, and means to regulate the magnetic depression of the typebar lever to the throw of the type-bar, said regulating means including a hanger adjustably secured to the type-bar driving lever to pivotally support said pendant.

25. In a typewriting machine, the combi nation with a type-bar, having a depressible driving lever connected thereto, a disconnected key-lever and a power-driven continuously-rotating magnetic cylinder, of a pendant connected to the type-bar driving lever and shiftable by the depression of the key-lever into the magnetic field of the cylinder to depresssaid type-bar lever for a fixed throw of the type-bar in typing, and means to regto pivotally support said pendant and raise and lower said pendant to the magnetic axis of the cylinder.

RICHARD VON REPPERT.

diary member having a driving connection with the type-bar-actnating lever and an infield of the cylinder to be power-actuated, or

vibrated and depressed by the key-lever to

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