US1730457A - Typewriting machine - Google Patents

Description

G. G. GOING TYI EWRITING MACHINE Oct. 8, 1929.

INVENTOR 9M b 49. ha

Filed Dec. 2'7, 192'? ATTORNEY WITNESSE 04M one of the typebars GEORGE e. some, or mmnnnrowiv, conunc'rrcur, ASSIGNOR TO imrrrne roumn- WRITER COMPANY, OF ILION, NEW YORK, A. CORPORATION OF NEW YORK rYI-Ewmrme macn un.

I Application filed December 27, 1927. Serial No. 242,800.

This invention relates to typewriting ma-' object is the production of a noiseless, or approximately noiseless, system of typebars suitable for use in such small machines as those which are called portable typewriting machines. Several inventions more or less closely resembling this have been made byme, and one of them is described and claimed inan applicat'o filed Nov. 11 1927, and bears Serial No. 232,582.- On feature of the present invent tion consists f a novel typebar, another feature consists of a typebar-retarding and typebar-driving device somewhat similar to a governor, and .called herein a typesilencer and still other features reside in combinations in which that device, the typebar and actuating mechanism are elements, the construction and operation of which device and type-bar and the construction and operation of-which combinations are particularly described herein, while some claims of the application define the typebar,

others define the typebar-silencer, and others define combinations which include them both. On the accompanying sheet of drawings, on which like reference numerals designate like parts in different views,

Fig. 1 is a side view of mechanism which embodies the invention, and which includes actuating mechanism connect-" two typebars, edto the typebars,

the other at the right side of the system of typebars of a typewriting machine;

Fig. 2, a side view of a rack which is'a portionof atypebar-silencer;

Fig. 3, a side view of a plate which is a portion of that silencer;

Fig. 4, a plan of the typebar-silencer and a fragmental cross-section of a typebar;

Fig. 5, a side vievv of portions of a typebar and typ'ebar-silencer, the typebar being or much less noisy than pivoted f type bars commonly are, but an additional.

1 'for; a patent, which was and two typebar-silencers,

being at the middle and"'are the curved flange,

in a position indicated by broken lines in Fig. 6, a side view of these portions, typebar being in a different position; and

Fig. 7, a side view of the same portions, the typebar being in its printing position.

The drawings are full-sized views of the mechanism which they represent and which is a portion ofa small or portable machine. The two typebars 1 and 11 are mounted on the arcuate pivot wire 21, the former being about midway between the ends, and the latter near the right end, of the wire, and

they fit loosely in kerfs 61 out in the Wiresupporting segment 22. The typebars 1 and the j 11 include the type-block's 2 and 12 andty e 3 and respectively, and the type-blocks ie on the typebar-rest 23 when the barsare in their normalpositions. The printing position of a bar is thatwhich it takes when one.

of its. type makes contact with theplaten 24 at the pr1nting.,p0int 25. The angular movement of each bar is 90 or'thereabouts,

but might be more, and the relation of the 7 segment to the platen might be suchas to make the printing point higher or lower on the platen than where it is represented in Fig. 1 of these drawings. Of course the machine includes means for enablin the platen and segment to be relatively shi ted so that either type of each typebar may be swung to the platen at the printing point. The-plvot wire 21. bar 1 an of every the base base 14 of typebar 11, and the ase (passes through the base 4 of t eforate'd arm 5 and the lug 6, and on the body of the bar is the long curved arm 7 which projects from the back thereof and on which rib or keeper 8 and the rack 9. .The axis of curvature of the device 8 is the pivotal axis of the typebar,the pitch-line of the teeth of the rack is a curve, the inner end, or that shown as he upper end in these drawings, other or outer end of the axis of the bar, and the lower end. 10 of the flange 8 being at a certain distance, to be hereinafter definitely s ecified, from the inner end of the rack 9.

n the base of typebar 11 are the short perbeing nearer than is its.

- spects these typebars are exactly alike.- Every vice 18 being at the same distance from rack 19 as the end 10 or device 8 on bar 1 is from the'rack 9. Of course typebar 11 is bent near the type-block 12 more than bar 1' is near the type-block 2, and the type on block 12 'difi'er from those on block 2 in respect of the characters formed on them, but in all otherreother typebar of the system is exactly like each of the above described typebars except in respect of the bend near the typeblock and the characters formed on it.v

It is to be understood, and the drawings and foregoing description are believed to make it clear, that the rack andt peblock of each typebar are on the same side of the lane that contains the pivotal axis of the.

ar and is contiguous to the outer end of the-rack, and that the rack extends from the outer end towards the inner end of the rackarm and the back of the body of the bar, the front of the bar and body being that side or edge fromwhich the type project.

The keylever 26, 27, 28, sublever 29, 30, and link 31, these levers being connected together by the pivot pin 32 and spring 33, the arm 30 on the fixed crossbar 34, and'the arm 29 being connected to arm 5 of typebar 1 by the link, form the actuating mechanism by which that typebar is swung from its normal position towards and nearly toits printing position. The keylever, lower arm of the sublever, and link 35 comprised in the actuating mechanism of typebar 11, are exactly like the described keylever, sublever arm 30, and link 31, respectivel but the upper arm 36 of the sublever whic is connected to arm 15 of typebar 11 is longer than arm 29 of the other sublever and is bent more, below its upper end, so that the inwardly bent portion is in alignment with the arm 15. The keylever and sublever of. typebar 11 are connected together b a pivot pin and spring like the pin 32 an spring 33 and the lower arm of this sublever bears on the crossbar 34. Both keylevers, and the other keylevers of the machine which are connected to typebars,'are loosely mounted at their rear ends on the fixed crossrod 37 and extend through the comb-plate 38 and are normally held by springs 33 and others like it in contact with the crossbar 39. under the keylevers and fastened to this comb-plate limits the downward movement of each keylever, the lowest position of the stem 27 and keyhead 28 of the lever thatis connected to typebar 1 being indicated by dotted lines in Fig. 1. The keylevers also pass through the comb-plate 41 affixed to crossbar 34, and the lower arms of the subof the sublever normally bearing other typebar,

' silencer to the typebar.

through the pivot hole 52 of each silencer.

The stopbar 40 passinglevers pass through this combplate. The

lug 6 of typebar 1 and lug 16 of typebar 11 and the similar lug of every other typebar act on the universal bar'4 when the typebars are operated.

A controlling member, governing device or typebar-silencer is connected to each typebar. 7 These devices are mounted onthe arcuate pivot rod 43 which is supported by the arms 44, 45, and others like them, and passes behind thetypebars, these arms being 'fastened to the segment as shown or else to some other portion of the framework. The form and construction of these devices may be varied, but those of the oblong device shown and described are the preferred form of construction. Each silencer is composed of a -ra'ck46 (Fig. 2) and a pair of side plates permanently fastened together by rivets 60 or otherwise,.the rack being between the side plates and having the appendage 47 on which at its outer end is the lug 48. The plate 49 (Fig. 3) is one of the pls tes of this pair, andthe' other, 50, is a duplicate of it. In the plan (Fig. -4) of this silencer the 2 upper edges of both side plates, and that of rack 46, are shown. The lug 48 is grooved and in the groove 51 (Fig. 4), which extends across the lug, the flange, rib, or keeper 8 oftypebar 1, or device 18 of typebar 11, or the similar flange, ribor keeper of any silencer and the typebar, for example, typebar 1, or typebar 11, are arranged as they are shown in Fig. 1, the lug and the keeper form members of a coupling which connects the The rod 43 passes This hole is near the middle of the device and near the inner endof the rack' and passes through the rack and both side plates. The side plates extend beyond the inner end of the rack and form the end or edge 53 of the device, which end or edge is on the opposite side 'of the hole 52 from the end or edge that is formed bythe side plates and outer end of the rack. The portions 54 and 55 of the side plates form side walls of the space 56 that loosely fits so that when the extends from end or edge 53 of the device to the inner end of the rack, andthese portions are wider near. their outer ends than they are near the rack.

The keyhead or keycap of a keylever properly operated is depressed quickly and far enough to force the lever to strike the stopbar 40. As the key or keyhead28 of typebar 1, for example. starts to descend, this typebar is pulled by link 31 from its normal position towards its printing position, and device 8 moves upward in groove 51 and lug 48 but the typebar-silencer is inactive while device 8 is in the groove of the lug. Then that device amounts to a keeper coacting with the lug and preventing the silencer from turning. Rack 9 on the typebar moves into mesh with'rack 46 to the printi of the silencer as the typebar is reaching the position'indicatedin Fig. 1 by the dotted lines at w and the keeper 8 then passes above the lug 48 and as the racks are so engaged teeth next to the inner end of rack 9 mesh with the lug from leaving the keeper before rack 9- begins to mesh with rack 46- The force exerted on the keylever continues to actuate the typebar until the bar reaches the position indicated in Fig. 1 by the dotted lines at y, whereupon the keylever is arrested by the stopbar 40. The movement of the typebar continues uninterrupted, however, due to its 10st motion connection with the keylever. During the movement of thetypebar from the position indicated at a: to that indicated at y, Fig. 1, rack -9, acting on rack 46, turns the typebar-silencer from the position indicated in Fig. 5 to that indicated in Fig. 6, rack 9 meanwhile passing between the side plates of the silencer into the space 56, but the reaction of the silencer on the typebar, which is compelled to overcome the inertia of the silencer and impagt to it progressively acceleratedmotion /so retards the typebar that itmoves much rhore slowly when it gets to position 3 than it did when it'got to position as. The typebar is driven from position 1 'ng position indicated by the dotted lines at z, 1, by the silencer actuated by its own momentum and turning. from the position indicated in Fig; 6 to that indicated in Fig. 7, but this portion of the movement of the typebar is quite slow .and the action of the t pebar is not noisy when the type reaches 1: e platen. Nevertheless the type is pressed firmly against the inking ribbon and platen mentum is suddenly terminated by the unyielding resistance of the platen, and of course the silencer is arrested by the typebars acting on the platen. As the typebar swings from position '1 to position 2, it moves link 31 and arm 29 of the sublever backward a little andslightly raises the front end of arm, 30 of the sublever from the crossbar 34.v It isv to enable this to be done that the link and sublever are made movable with the typebar to a slight extent while-the keylever is inactive. Of course the same effect might be obtained by means of a lost motion connection at either end of link 31. or somewhere else between the keylever and the typebar.

The typebar and devices comprising the actuating mechanism are restored to their normal positions by the action ofspring 33 .which is stretched when the keyhead is depressed andas the typebar moves backward by the silencer when its morack 9 turns the silencer tothe position indicated in Fig. 5 and then keeper 8're-engages lug 48 and rack 9 moves away from the rack of the silencer which is arrested by the typebar and thereafter remains in its normal position, indicated in Fig. 1, until typebar 1 is again operated.

The actuation of typebar 11, or that of any of the'othertypebars of the system, by means of its actuating mechanism and controlling and will be fully understood, it is believed, from the foregoing description.

Various changes may be made without departingvfrom my invention.

What I claim as new and desire to secure by Letters Patent, is

1. The combination of a pivoted typebar on which is a rack, actuating mechanism con nected to the typebar, and a pivotally mounted typebar controlling member comprising a rack which is capable of meshing-with that on member or silencer, is like that of typebar 1 the typebar and through which force that actuates the controlling member is transmitted to it from the typebar.

2. The combination of a pivoted typebar on which is a rack, actuating mechanism'connected to the typebar, a stop that arrests the action of said mechanism before the typebarreaches its printing position, and a pivotally mounted typebar controlling member comprising a rack which is capable of meshing with that on the typebar and through which the force that actuates the controlling memher is transmitted to it from the type bar.

3. The combination of a pivoted typebar on which is a rack, actuating mechanism connected to the typebar and composed of two portions one of which is movablewith the typebar when the other is inactive, a stop that arrests the action of said mechanism before the typebar reaches its printing position, and a pivotally mounted typebar-silencer comprising a rack which is capable of meshing withvthat on the typebar and through which the force-thatv actuates the silencer is transmitted toit from the typebar.

4. The combination of a pivoted typebar on which is a rack, actuating mechanism composed of a keylever and means which connects it tothe typebar and is movable with the typebar .when the keylever is inactive, a stop that arrests the keylever before the typebar reaches its printing position, and a pivotally mounted typebar-silencer comprising a too of the printin movement of the typebar, the

typebar and s1 encer having portions that coact when the racks are unmeshed.

6, The combination of a pivoted typebar on which is-a short rack, actuating mechanism connected to the typebar, and a pivotall mounted typebar silencer comprising arac which is-capable of meshing with that on the typeba'r during the latter portion only of, the printing movement of the typebar, the typeba'r having on it a curved keeper, the

axis of the curvature coinciding with the pivotal axis of the type bar, and the silencer having onit a counterpart that co-acts with i said keeper-when the racks are unmeshed.

7, The combination of a pivoted typebar on which is a rack,;the pitchline of which is a curvewhich is nearer to the pivotal axis of the typebar at the inner end than it is at the outer end of the rack, actuating mechanism connected t6 the typebar, and a pivotally mounted typebar-silencercomprising a rack which is capable of meshing with that on the typebar and through which the force that actu'ates the silencer istransmitted to it from the typebar and the pitchline of which rack is a curve which is much farther from the pivotal axis of the device at the outer end than it is at the innerend of the rack.

8; The combination of a pivoted typebar on which is a rack, the pitchline of which is a curve which is nearer to the pivotal axis of the typebar at the inner end than it is at the outer end of the rack, actuating mechanism connected, to the typebar, a stop that an rests the action of said mechanism before the typebarreaches its printing position, and a pivotally mounted typebar-silencer comprising a rack which is capable of meshing with that on the typebar and through which the forcethat actu'ates te silencer is transmitted to it from the typebar and the pitchline of 1 which rack is a curvewhich is much farther from the pivotal axis of the device at the Outer end than it is at the inner end of the rack.

9. .A typebar-silencer composed of a rack and a pair of side plates permanently fastened together, the rack being between the plates and extending from near the middle 'to.-an end or edge of the silencer andthe pitchline of the rack bein a curve, and the side plates extending tot e opposite end or edge of the silencer and forming side walls of a space which extends from that end or edge to the inner end of the rack, and the Middlesex,

being on the rack an appendage forming a portion that projects from the back of the body. and has on it a curved keeper and a rack, the axis of curvature of the keeper coinciding with the pivotal axis of the bar and the pitchline of the rack being a curve whichis nearer at its inner end than it is at its outer end to the base of the bar.

12. The combination of a typebar that is movable to and from its printing position on a fixed axis passing through the base of the bar and comprises an arm springing at its inner end -from the back of the body and receding therefrom to its other or outer end which is farther than is its inner end from the base of the bar, and on which arm is a curved rack extending from the outer end towards the innerend of the arm, the rack and typeblock of the bar being on the same 'side of the plane that contains the pivotal axis of the bar and is contiguous to the outer end of the rack, and a typebar-silencer actuated by the typebar and having a geared connection with said rack on the typebar.

Signed at Middletown, in the county of and State of Connecticut, this 22nd day of December, A. D. 1927.

GEORGE G. GOING.

silencer having in it a pivot-hole that passes] I through the side plates and rack near the inner end of therack; a

10. An oblong typebar-silencer' composed of a rack and a nently fastened together,

and that is the rack being between the plates and extendingfrom near the middle to one end of the-silencer and the pitchline of the rack being a curve and there pair of side plates perma-

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