US1981034A - Typewriting machine - Google Patents

Description

Nov. 20, 1934. c. GABRIELSON TYPEWRITING MACHINE 3 Sheets-Sheet 1 Filed June 1. 1

NYENTOR ZZQZSO Z/ v ATTORNEYS C. GABRIELSON TYBEWRITING MACHINE Nov. 20, 1934.

Filed June 1. 1953 3 sheets-sham 2 Q N QEDFEEMMW Nov. 20, 1934.

C. GABRIELSON TYPEWRITING MACHINE Filed June 1, 1953 3 Sheets-Sheet 3 INVENTOR @ZGGhZ EZSOIZ/ AT'TORN EYS Patented Nov. 20, 1934 TYPEWRITING MACHINE Carl Gabrielson, Syracuse, N. Smith & Corona Typewri N. Y., a corporation of New York Application June 1, 1933, Serial No. 673,849 38 Claims. 197-186) The invention relates to typewriting machines and has for its main object to provide a typewriting machine which is noiseless, or substantially so, in its operation.

A further object of the invention is to provide a typewriting machine wherein noiseless or substantially noiseless typing is obtained notwithstanding the type impressions are formed as the result of impactive or percussive action of types which are suddenly arrested, at the ends of long printing strokes made at high speed, by the resistance of a paper backing platen.

A still further object of the invention is-to provide effective means in an impact printing typewriting machine for absorbing vibrations in the impression forming means of the machine and deadening the noises of operation of said impression forming means.

Another object of the invention is to provide a typewriting machine wherein the set of type carriers and the platen are all suspended for uni,-'

versal movement bodily as a single unit in a vibration absorbing and sound deadening mounting to effectively prevent transmission during operation of the machine of noise-producing vibrations from the parts of said unit to the desk or other support on which the machine stands.

To the above and other ends which will appear hereinafter, the invention consists in the features of construction, combinations of elements, and arrangements of parts hereinafter described in this specification and particularly pointed out in, the appended claims.

In the accompanying drawings, illustrating a preferred construction of typewriting machine embodying the invention,

Fig. 1 is a view, partly in side elevation and partly in central longitudinal section, showing so much of the machine as is necessary for an understanding of the invention;

Fig, 2 is a fragmentary top plan view of the machine;

Fig. 3 is a fragmentary rear elevation of the machine;

Fig. 4 is a sectional view on the line 44 of Fig. 2;

Fig. 5 is a fragmentary sectional view on the line 55 of Fig. 1; Fig. 6 is a sectional view on the line 66 of Fig. 1, certain parts being omitted for clarity of illustration of certain features of the invention;

Fig, 7 is a top plan view of the suspended or floating frame or support for the type bars and 5 -fplaten carriage; and

Fig. 8 is sectional vi Y., assignor to L. C. tel-s Inc., Syracuse,

a fragmentary vertical longitudinal ew of the platen carriage on an enlarged scale.

The machine has a main frame comprising two upright sheet metal front corner bars 10, two upright sheet metal rear corner bars 11, two sheet metal side bars 12, a sheet metal cross bar 13, a

sheet meta anchor bar key lever re chine the two upright bars 10 1 cross bar 14, front and rear sheet the key levers, a sheet metal 18 of angular cross-section for the turn springs. At each side of the maand 11 are united adiacent their lower ends by the adjacent, horizontal side integral wit bar 12, said side bar being preferably h the two upright bars which it unites.

The two upright front corner bars 10 are tied together at their upper ends by the cross bar 13 which has end flanges 13 secured by screws 19 to the front corner bars.

ner bars 11 ends by cross bar 14 The two upright rear corare tied together adjacent their upper which has end flanges 14 secured by screws 20 to said rear corner bars. The front key lever guide comb 15, which also serves as a cross-bar of the main frame, ties the front corner bars 10 together adjacent their lower ends,

being secured by screws 21 to inwardly turned lugs 22 on said corner bars. The rear key lever guide comb 16, the key lever fulcrum bar 17, and

the pendent web of the key lever spring anchor bar 18 are secured in face to face relation to inwar'dly turned lugs 23 on the rear upright corner bars 11 by screws 24, said comb and bars serving as cross bars of the main frame and tying bars 11 together bars.

cushioning adjacent the lower ends of the latter The main frame 'is provided with four rubber feet 25 secured by screws 26 to the under faces of horizontal inwardly turned lugs 27 each forme d at the lower end of a different one of the four upright corner bars of said frame. The rear comer bars 11 of the main frame are each provided at its upper end with an inwardly extending lug 28 which lies flatwise in a horizontal plane. vided with short arms Each rear corner bar 11 is also protwo superposed and vertically spaced 29 extending horizontally forward from the front edge of the bar between the upper end of the rear corner bar and the upper edge of frame side bar 12 which unites the rear corner bar to its companion front corner bar.

At the rear part of the main frame, and suspended in said main frame, is an auxiliary floating frame. in the mai This floating frame is so suspended 11 frame as to be capable of limited in the enlarged 2 universal bodily movement or vibration in and relatively to the main frame, as more fully hereinafter described.

The suspended floating frame comprises a sheet metal carriage bed plate 30 extending fiatwise in a horizontal plane between and somewhat above the upper ends of the rear corner bars 11 of the main frame, a pair of upright end bars 31 pendant from the respective ends of plate 30 and preferably integral with said plate, a pair of sublever segment supporting arms 32 which extend horizontally forward and inward from the free lower ends of bars 31, a pair of type-bar-segment guide supporting arms 33 extending forward from the upper ends of bars 31, and a pair of metal hanger blocks 34 riveted to and projecting laterally beyond the respective ends of the plate 30. The inner portion of each hanger block 34 is reduced in thickness and is secured under plate 30 by four rivets 35, the top face of the thicker outer portion of each hanger top face of plate 30. v

The connections between the main and auxiliary frames, whereby the latter frame is suspended in and from the former frame for limited independent universal bodily fioating movement and vibration, are all vibration absorbing and sound deadening yielding connections. The preferred form and arrangement of these connections shown in the drawings will now be described.

Between the top face of each lug 28 on the upright rear corner bars or standards 11 of the main frame and the bottom face of the thickened outer portion of the adjacent hanger block 34 of the auxiliary frame there is interposed a block of resilient vibration absorbing and sound deadening material 36. The thickened outer portion of each block 34 is provided with a pair of fore-andaft spaced bores 37 (Fig; '7) having enlarged upper end portions. Each bore 37 is lined with a tubular bushing 38 corresponding in shape to that of the bore, i. e. having an enlarged upper end portion in the enlarged upper end portion of the bore, said bushing also being formed of resilient vibration absorbing and sound deadening material. A pair of screws 39 extend down through the pair of lined bores in each hanger block 34 and through the adjacent block 36 of said resilient material and are threaded at their lower ends in suitable screw holes in the adjacent lug 28, the head of each screw being countersunk lined upper end portion of the bore 3'?! through which said screw extends, lying in the enlarged upper end portion of the bushing 38 in said bore.

The remaining ones of said connections comprise four blocks 40 of said resilient material each shaped like a very short barreled spool with relatively thick heads. One of these spool-like blocks 40 is carried by each of the arms 29 which extend forward from the upright bars or standards 11 of the main frame. The forward ends of the pair of arms 29 on each standard 11 are opposite but spaced from the outer face of the adjacent pendant end bar 31 of the auxiliary frame, and each arm 29 has a key-hole shaped slot 41 therein extending rearward from the forward end of the arm. into the slot 41 of each arm 29 is sprung or forced the short barrel of one of the blocks 40 to interlock said block with the arm. The innermost face of the innermost head of each block 40 contacts the outer face of the adjacent pendant end bar 31 of the auxiliary frame, each block 40 constituting a suspension element for the auxiliary frame. The pair of superposed spaced block being flush with the blocks 40 at one side of the main frame are directly opposed to the pair at the opposite side of the main frame, the auxiliary frame being yleldingly held between the two opposed pairs of blocks 40.

Preferably the suspension elements and cushions comprising blocks 36 and 40 and bushings 38 are formed of pure soft rubber, and preferably also each such element is normally under. compression so as to be capable of both expanding and contracting to maintain contact at all times with the metal surface or surfaces with which it is engaged notwithstanding universal relative movement between the main and auxiliary frames during operation of the machine. Preferably also these elements are assembled simply as described and are not cemented or vulcanized to the metal parts they contact.

The system of type actions, and the provision for effecting a relative ease shift movement between the type carriers and the platen, in the machine shown are similar to those provided in the L. C. Smith typewriter and obviously may be varied. These old parts have a novel arrangement and mounting with respect to the main and auxiliary frames of the improved machine, however, which will now be described.

The type bars 42, only one of which is shown, of the usual arcuate system of swinging type bars, are pivoted on the usual hangers 43 held to the usual shiftable type bar segment 44 and print, as usual in this type of machine, by percussion or impact at a common printing point on the platen 45. Adjacent their free ends, the type bars normally rest on the usual pad 46 of sound deadening and vibration absorbing material held to the usual arcuate type rest 4'? supported, as usual, from the type bar segment by a pair of arms 48, one of which arms is shown in Fig. 1.

Resting on arms 32 of the auxiliary frame, and secured at its ends to said arms by screws 49 which extend through screw holes 32 in said arms, is the usual slotted sub-lever segment 50 of the L. C. Smith machine, which segment also serves in the present machine as a lower cross bar of theauxiliary frame to stiffen and brace said frame. Fulcrumed on the pivot wire 51 in segment 50 are the usual upstanding sub-levers 52 of the type actions, each said sub-lever being connected at its upper bar by the usual draw link 53, and being connected at its lower end to itsassociated character key lever 54 by the usual draw link 55. The character key levers 54, and the usual shift key lever 56, are guided in the usual front and rear guide combs 15 and 16, are fulcrumed on the usual fulcrum bar 17, and have portions normally held by the usual key lever return springs 57 against the under face of the usual stop pad 58 of sound deadening material held to comb 15, as in said prior machine. The return springs 57 are anchored to anchor bar 18.

The type bar segment 44 is provided at its ends with the usual outwardly facing ball-race members 59 held by set screws 59 and opposed to the usual inwardly facing ball-race members 60. In the present machine, however, the outer ends of the race member 60 are held by set screws 61 in tubular bushings 62 rigidly afiixed to arms 33 of the auxiliary frame at the outer ends of said arms preferably by swaging the outer ends of the bushings in apertures in said arms, as shown more clearly in Figs. 1 to 3. Between each pair of opposed race members 59-60 is confinedthe usual ball bearing 53. Connected to the segment end to its associated type i 44 to shift the latter down and up for case changing, to cooperate with the ball bearings and their raceways to guide the segment in its caseshifting movements, and to support the segment in its normal elevated lower-case printing position shown in Figs. 1 and 3, is the usual rock shaft 64 having the usual pair of forwardly extending rock arms 65 pivoted at 66 to the segment, and also having the usual forwardly extending rock arm 67 connected by the usual link 68 to the shift key lever 56. Arm 67 has the usual pendant lug 69 to which is connected the usual spring 70 for holding the segment in lower-case printing position and lifting it back to said position from upper-case printing position after release of the shift key lever\56. Spring 70 in the present machine is anchored at its forward end to a suitable inwardly projecting stud 72 carried by the main frame. Asusual in said prior machine, the rock shaft 64 is journalled on hearing screws 71 carried by the sub-lever segment 50, but it will be noted that in the present machine, as heretofore described, the latter segment, like the type bar segment, is mounted in the auxiliary suspended frame.

The type bar segment, the set of type bars, and the type bar rest, are thus guided and supported on the auxiliary frame to float and vibrate as a unit with the said suspended auxiliary frame, as is also the usual type bar guide 73 which is, as in the prior machine hereinbefore referred to, held by screws 74 to a supporting bracket 75 fixed at 76 to a lug 77 formed on the type bar segment. Depending from the central part of the type bar segment-is the usual stem 78 which moves up and down with the segment and passes loosely through an aperture 79 in a shift stop lug 80 formed on the sub-lever segment 50. The usual shift stops 81 and 82 carried by said stem are engageable respectively with the lower and upper faces of lug 80 to determine the lowercase and upper-case printing positions of the type bar segment.

The platen 45 and its traveling carriage are also mounted on the suspended auxiliary frame to float and vibrate with said frame and the system of type bars as a unit. The proper working relation thus not disturbed by the capacity of the auxj iliary frame for universal floating or vibratory motion relatively to the main frame. The shaft 83 of the roller platen 45 is joumalled at the ends of the carriage in suitable bearings on said carriage. While the construction of the carriage and of its guiding means on the suspended frame may obviously be varied, those shown and about to be described are preferred.

' The carriage of the improved machine is of special construction to assist in eliminating the printing noises by affording a strong and light platen carriage which constitutes a vibration absorbing and sound deadening support for the platen and eliminates or greatly reduces transmission of noise-producing vibrations to the auxiliary frame when the platen is struck by a type, and assists in reducing the noise ordinarily incidental to type impacts on the platen in percussive or impact printing machines. The improved carriage is guided by a pair of metal race bars 84 which extend transversely of the machine on top of the carriage bed plate 30 adjacent the front and rear edges of said plate, said bars being held to the plate by suitable screws 85, and ball bearings 86 being interposed between each said bar and an opposed one of a pair of of the type bar system and platen is ball races 92 provided on the longitudinal edges of the carriage. The carriage comprises a pair of superposed and parallel'fiat sheet metal plates 87 and 88 held vertically spaced apart by two rows of annular metal spacers 89 adjacent their longitudinal edges, said plates being secured togetherby two rows of screws 90, the shank of each of which passes through the aperture in one of said annular spacers, said screws tightly clamping the plates and interposed spacers together. The upper one 87 of said plates is provided at its ends with integral upwardly and forwardly extending end portions 91 constituting end plates or members of the carriage, 'in which carriage end portions 91 the platen shaft 83 is journalled. The longitudinal edges of plate 87 are beveled downward and inward and the longitudinal edges of plate 88 are beveled upward and inward, the two pairs of superposed beveled edge portions of the said assembled plates forming carriage races 92 opposed to the race bars 84 on the carriage bed plate 30. Interposed between each race bar 84 and the opposed ball race 92 of the carriage are the ball-bearings 86, heretofore mentioned. Pads 94 of a suitable vibration absorbing and sound deadening material, preferably soft rubber, are held to the bottom face of plate 87 by cloth patches or retaining coverings 95 cemented or otherwise fast ned around their edges to said plate. said pads alternating with similar pads 94 upper face of plate 88 by which are held to the similar clgth patches 95. Each patch holds the enclosed pad in face contact with the plate to which the patch is attached, but the pad is otherwise free of connection with the plate.- The pads and their retaining coverings on each plate are free from contact with the other plate and the pads and pad coverings thereon.

The two segments 44 and 50 and the several portions of the main frame and of the auxiliary frame are preferably provided with suitable vibration absorbing and sound deadening linings 96. Preferably each such lining, as in the case of the covered pads 94-95, consists of a' pad of suitable vibration absorbing and sound deadening material, preferably soft rubber, held in contact with the lined frame portion by a cloth patch or retaining covering which is cemented around its edgesto the said frame portion. One such lining is shown for the inner faces of all the frame members or portions 10, 11, 12 and 29 at each side of the main frame, another for the inner faces of the two frame members or portions 31 and 33 at each side of the auxiliary frame, another for the under face of member 30 of the auxiliary frame, another for the under face of member 32 of the auxiliary frame at each side of said frame. another for the under face of member 13 of the main frame, another for the front face of member 14 of the main frame, another for the rear face of segment 44, and another for the under face of segment 50.

The linings 96 on the main and auxiliary frames serve to absorb vibrations which operations of the parts on each frame tend to produce in that frame, and to absorb and deaden air-carried sound and other vibrations produced by working parts of the machine including the impression forming means. These linings also assist in reducing to a minimum the number and intensity of the vibrations which ultimately reach the desk or other machine support through the main frame and through the air.

While in the preferred construction shown and 15 described the main and auxiliary frames are con- 'structed of sheet metal parts, it will be obvious that each of these frames may be otherwise constructed, as for example of a metal casting or of cast metal parts.

Any suitable impression inking ribbon may be provided, and it will be understood that suitable inking ribbon feeding, paper feeding, carriage escapement, and other devices commonly found in typewriting machines will be included in the machine, but such devices form no part of the present invention and are not, therefore, shown. Said devices may be, for example, similar to the corresponding devices provided in the L. C. Smith typewriting machine hereinbefore mentioned.

It will be observed that the present invention provides for silently forming type impressions by the action of impression forming means of a typewriting machine, which means forms the impressions as a result of impactive or percussive coaction between the type and platen elements of said means, the types being suddenly arrested by the platen against which, or the paper backed thereby, they collide at high speed, rather than at low speed under heavy pressure as in the socalled pressure-printing noiseless typewriters.

It will also be observed that the parts which coact during the formation of an impression are held suspended on a main frame in such manner as to permit them to float or vibrate as a unit universally relatively to the main frame in response to shocks of operation so that their working relationship is not affected by such floating or vibratory motion, whereby alignment and letter spacing of impressions are not adversely affected. The mode of suspension of these parts is also such as to eliminate or deaden the noise which would otherwise result from the type impacts against the platen, the impacts due to arrest of case shift movements of the type bar segment, the impacts of the type bars on the type rest and shocks due to arrest of letter feed, tabular feed, and return movements of the platen carriage. Noise producing vibrations resulting from these shocks and impacts are absorbed and effectually prevented from reaching the desk or other support of the typewriter which ordinarily acts as a sounding board to augment the several noises resulting from said shocks and vibrations.

There is sufficient looseness or flexibility in the connections between the shift and character key levers and the parts actuated thereby on the auxiliary frame to permit the limited universal floating and/ or vibratory movement between the main and auxiliary frame mad possible by suspending the auxiliary frame in rubber from the main frame as shown and described. Suspension of the auxiliary frame in the main frame to float or vibrate universally relatively to the main frame' effectually absorbs vibrations, reduces the shocks referred to, and prevents downward transmission to the desk or table of shocks and vibrations of noise producing or augmenting intensity and frequency.

What I claim is:

1. In a typewriting machine, the combination of a platen, a set of type carriers coaotive with the platen to print, means supporting 'the platen and set of type carriers in working relation as a unit, a main frame from which said supporting means is suspended for universal movement relatively to the main frame, a set of character key levers fulcrumed on the main frame, and operating connections between the set of key levers and the set of type carriers for selectively actuating the type carriers from the key levers to print.

2. In a typewriting machine, a main frame, a printing couple comprising a platen and a type carrier, means for actuating the type carrier to coact with the platen for printing, and

means resiliently suspending said printing couple from said frame for bodily movement as a unit relatively to the frame, said actuating means for the type carrier comprising a key lever fulcrumed on the main frame and means connecting said key lever to said type carrier for actuating the carrier to print when said key lever is actuated.

3. In a typewriting machine, a main frame, an auxiliary frame suspended in rubber in said main frame, a printing couple carried by said auxiliary frame, and'means on the main frame connected with one element of said couple to actuate the couple to form a type impression.

4. In a typewriting machine, a main frame, an auxiliary frame yieldingly hung from said main frame for universal vibration relatively to the main frame, and a platen and a set of type carriers both carried by'the auxiliary frame.

5. In a typewriting machine, a main frame, an auxiliary frame suspended in rubber in said main frame for universal vibration relatively to the main frame, a platen and a set of type carriers both carried by the auxiliary frame, and a set of key levers carried by the main frame and connected to the set of type carriers to selectively actuate the type carriers.

6. In a typewriting machine, a main frame having supporting and cushioning feet, a platen carriage, a platen on the carriage, a type bar fulcrum support shiftable relatively to the platen for case changing, a set of swinging type bars fulcrumed on said support to swing to and from the platen and each carrying upper and lower case types, key actuated means for case shifting the type bar fulcrum support, key actuated means for actuating the swinging type bars to print, and means flexibly hung from the main frame and supporting said type bar fulcrum support and platen carriage for positively limited universal bodily movement in unison relatively to the main frame.

'7; In a typewriting machine, a main frame having supporting and cushioning feet, a platen carriage, a platen on the carriage, a type bar fulcrum support shiftable relatively to the platen for case changing, a set of swinging type bars fulcrumed on said support to swing to and from the platen and each carrying upper and lower case types, key actuated means for case shifting the type bar fulcrum support, key actuated means for actuating the swinging type bars to print, an auxiliary frame carrying said type bar fulcrum support and platen carriage to move bodily as a unit with the auxiliary frame, supporting connections of sound deadening and'vibration absorbing material between said frames, and rigid frame interlocking elements each positively held to one of said frames and extending through a part of the other frame and completely insulated from said frame part by one of said supporting connections,

8. In a typewriting machine, a main frame, a floating auxiliary frame, rubber frame spacing elements interposed between said frames and engaged with the auxiliary frame to flexibly uphold the latter for universal floating movement,

in the main frame, rubber elements spacing the heads and shanks of said screws from the aux-' iliary frame, a set of swinging type bars, a platen, and a platen carriage upon which said platen is mounted, said set of type bars and the platen carriage being mounted on the auxiliary frame to float in unison with the latter frame relatively to the mainframe.

9. In a typewriting machine, a main frame,

a floating auxiliary frame, rubber frame spacing elements interposed between said frames and engaged with the auxiliary frame to flexibly uphold the latter for universal floating movement relatively to the main frame, clamping screws extending through certain of said frame spacing elements and the auxiliary frame and threaded in the main frame, rubber elements spacing the heads and shanks of said screws from the auxiliary frame, a set of swinging type bars, a platen, a platen carriage upon which said platen is mounted, said set of type bars and the platen carriage being mounted on the auxiliary frame to float in unison with the latter frame relatively to the main frame, key-controlled means for caseshifting the set of type bars relatively to the platen, and key-controlled means for swinging the type bars to the platen to print.

10. In a typewriting machine, a platen carriage, a platen on the carriage, a set of swinging type bars, key-controlled means for swinging the type bars to the platen, key-controlled means for effecting a relative case-shift movement between the set of type bars and the platen, stop means for limiting the extent of the said case-shift movement, a rest for thefree ends of the type bars, a main frame, an auxiliary frame hung from the main frame for positively limited universal movement of the auxiliary frame relatively to the main frame, said platen carriage, set of type bars, stops means and rest all being mounted on the auxiliary frame to float in unison therewith.

11. In a typewriting machine, a main frame, a set of type carriers, a platen, a vibration absorbing carriage upon which said platen is mounted, an auxiliary frame, vibration absorbing connections suspending the auxiliary frame from the main frame to float relatively thereto, said set of type carriers and the platen carriage being mounted on the auxiliary frame to float in unison therewith, and means for selectively actuating {the type carriers, said carriage having a base comprising two plates clamped together in spaced relation and each having held thereto pads of vibration absorbing material which are withheld from contact with the other plate and the pads held thereto.

12. A platen carriage comprising a pair of opposed flat plates held in fixed parallel spaced relation, two rows of spaced pads of vibration absorbing material, said rows extending longitudinally'of the carriage between said plates, one row of said pads being held to each plate, and the pads of each row engagiing only the plate to which they are held and also alternating with, and being free from contact with, the pads of the other row.

13. A platen carriage as claimed in claim 12, .wherein one of said plates is provided with integral end portions bent at an angle thereto and each formed with a bearing for a platen shaft.

14. A platen carriage, as claimed in claim 12, wherein the plates areoppositely beveled along their longitudinal edges to provide a raceway at each longitudinal edge of the carriage for ballbearings.

15. In a typewriting machine, a main frame, an auxiliary frame universally shiftable in and resiliently suspended from the main frame, a set of swinging type bars, a support on which saidtype bars are fulcrumed, key-controlled means for actuating the type bars, key-controlled means for case-shifting said support, a rest for the free ends of the type bars, a type bar guide, a platen carriage, and a platen on the carriage, said set of type bars, the type bar support, the type bar rest, the type bar guide and the platen carriage all being mounted on the auxiliary frame.

16. In a typewriting machine, a main frame having upstanding portions, a set of swinging type bars, a support on which said type bars are fulcrumed, a platen carriage, a platen journalled on the carriage, key controlled means for swinging the type bars to the platen, a guide for the type bars adjacent the platen, and means suspending said support, carriage and guide solely from said upstanding portions of the main frame to float as a unit relatively to said frame.

17. In a typewriting machine, a platen, a set of type selectively coactive with the. platen for printing, a main frame, an auxiliary frame carrying said platen and set of type for movement in unison with the auxiliary frame, and clamping means holding the auxiliary frame yieldingly suspended in the main frame, said clamping means including masses of rubber opposed transversely of the machine and resiliently gripping said auxiliary frame, and masses of rubber opposed vertically of the machine and'resiliently gripping said auxiliary frame.

18. In a typewriting machine, a platen, a set a of type selectively coactive with'the platen for printing, a main frame, vibration absorbing and sound deadening material carried by the main frame, a carriage for the platen, vibration absorbing and sound deadening material carried by said carriage, an auxiliary frame upon which the carriage and set of type are mounted for movement in unison with the auxiliary frame, vibration absorbing and sound deadening material carried by the auxiliary frame, and means resiliently suspending the auxiliary frame in the main frame.

19. In a typewriting machine, a platen, a carriage for the platen, a'set of type selectively coactive with the platen for printing, a main frame provided with vibration-absorbing means, an auxiliary frame provided with vibration-abcorbing meansand carrying said carriage and set of type for movement in unison with the auxiliary frame, and vibration-absorbing supporting connections I yieldingly supporting the auxiliary frame from the main frame and locking said frames against separation.

20. In a typewriting machine, the combination of a main supporting frame, an auxiliary frame hung from the main frame for positively limited vibratory movement relatively to the main frame, a platen carriage, a platen on the carriage, a set of type carriers selectively coactive with the platen to print, and means for selectively actuating the type carriers for printing, said carriage and type carriers being supported by the auxiliary frame to vibrate therewith as a unit relatively to the main frame.

21. In a typewriting machine, the combination of a main supporting frame, a platen carriage, a platen on the carriage, a set of type selectively coactive with the platen to print, means for'effecting printing coaction between the platen and a selected type, and means hanging the platen carriage and set of type from the main supporting frame for universal vibratory movement of the carriage and set of type as a unit relatively to said frame to a positively limited extent.

22. In a typewriting machine, thecombination of a main supporting frame, an auxiliary frame,

and means for effecting printing coaction between the platen and a selected type, said auxiliary frame carrying said set of type and the platen carriage to move asa unit therewith relatively to the main frame when said auxiliary frame moves. I

23. In a typewriting machine, the combination of a platen carriage, a platen on the carriage, a set of selectively operable type carriers coactive with the platen to print, an auxiliary frame supporting said carriage and set of type carriers, a main frame, resilient'suspension means for the auxiliary frame resiliently suspending said frame from the main frame, and connecting means between the main frame and auxiliary frame holding the same against disconnection, said suspension means and connecting means permitting limited floating movement of the auxiliary frame relatively to the main frame.

24. In a typewriting machine, the combination of a main frame, an auxiliary frame, vibration absorbing suspension means for the auxiliary frame hanging the auxiliary frame from the main frame for universal movement of the auxiliary frame relatively to the main frame, said auxiliary frame being supported solely by said suspension means, a platen carriage, a platen on the carriage, a set of type selectively coactive with the platen to print, and means for selectively actuating the type for printing, said carriage and set of type being carried by the auxiliary frame to move therewith as a unit relatively to the main frame.

25. In a typewriting machine, a main supporting frame, an auxiliary frame, vibration absorbing connections between the frames floatingly supporting the auxiliary frame on the main frame and positively holding it against disconnection from the main frame, a platen carriageon the auxiliaryframe, a platen on the carriage, a set of type carriers on the auxiliary frame, and means for selectively actuating the type carriers to print.

26. In a typewriting machine, a main frame having vibration absorbing supporting feet, an auxiliary frame, a platen carriage supported on the auxiliary frame at the tops of said frames, a

platen on the carriage, a set of swinging type bars supported on the auxiliary frame below and forward of the carriage, means for selectively swinging the type bars upwardly and rearwardly to the platen to print, and vibration-absorbing connections between said frames adjacent the tops of the frames suspending the auxiliary frame from the main frame and each interlocking the frames against disconnection and being universally yieldable to a limited extent to permit limited universal floating movement of the auxiliary frame relatively to the main frame.

27'. In a typewriting machine, the combination of a main frame, an auxiliary frame, said frames having vertically spaced opposed parts at both sides of the machine, resilient means interposed between said vertically spaced opposed parts at each side of the machine and engaging said parts,

said frames having spaced opposed parts at both sidesbf the machine opposed transversely of the machine, resilient means interposed between the transversely opposed parts at each side of the machine and engaging said opposed parts, rigid means at both sides of the machine rigidly held to one of said frames and loosely interlocked with the other frame, resilient means at both sides of the machine holding each of said rigid means out of contact with the frame with which it is loosely interlocked, a platen carriage and a set of type on the auxiliary frame, and means for causing the type to print.

28. In a typewriting machine, the combination of a'main frame, an auxiliary frame, said frames having vertically opposed upper end portions and lower portions at opposite sides thereof opposed transversely of the machine, vibration-absorbing and sound-deadening resilient material partially compressed between the said opposed portions of the frames, a platen carriage on the auxiliary frame at the upper end of said frame, a platen on the carriage, a set of pivoted type bars on the auxiliary frame below and forward of the carriage, and means for swinging the type bars upwardly and rearwardly to the platen to print.

29. In a typewriting machine, the combination of a main frame, an auxiliary frame, said frames having vertically opposed upper end portions and lower portions at opposite sides thereof opposed transversely of the machine, vibration absorbing and sound deadening resilient material partially compressed between the said opposed portions of the frames, a platen carriage on the auxiliary frame at the upper end of said frame, a platen on. no

the carriage, a set of pivoted type bars on the auxiliary frame below and forward of the carriage, means loosely interlocking the frames for limited up and down and lateral movements of the auxiliary frame relatively to the main frame,

and vibration absorbing and sound deadening resilient material preventing transmission of noise-producing vibrations set up in the auxiliary frame to, the main frame through said interlocking means for the frames.

0 30. In a typewriting machine, the combination 12 of a main frame, vibration absorbing supporting feet held to said main frame, sound-deadening material carried by said main frame, a platen, a carriage for the platen, sound deadening material carried by said carriage, a set of type carriers, means for selectively actuating the type carriers, an auxiliary frame, sound deadening material carried by the auxiliary frame, and vibration absorbing connections yieldingly hanging the auxiliary frame from the main frame to float relatively to the main frame, said platen carriage and set of type carriers being mounted on the auxiliary frame to float in unison therewith-relatively to the main frame.

31. In a typewriting machine, the combination of a main frame, key levers on the main frame, an auxiliary frame hung from the main frame for positively limited vibratory bodily movement of the auxiliary frame relatively to the main key levers and the type carriers for selectively actuating the type carriers.

32. In a typewriting machine, the combination of a main frame, a platen carriage, a platen on the carriage, a set of type, means for efiecting printing coaction between the type and platen in- 15 eluding keys supported in the main frame, and means hanging the platen carriage'and set of type from the main frame for universal vibratory motion of the carriage and set of type as a unit relatively to said frame and keys to a. positively limited extent.

33. In a typewriting machine, the combination of a main frame, a platen carriage, a platen on the carriage, a set of type carriers, an auxiliary frame supporting said carriage and set of type carriers, resilient suspension means for the auxiliary frame resiliently suspending said frame from the main frame, connecting means between the frames positively holding the frames against disconnection, said suspension means and said connecting means permitting limited floating movement of the auxiliary frame relatively to the main frame, and keys on the main frame connected with the type carriers on the auxiliary frame for selective actuation of the type carriers.-

34. In a typewriting machine, a main frame, an auxiliary frame, vibration absorbing connections between the frames floatingly supporting the auxiliary frame from the main frame and locking the frames against disconnection, a platen carriage on the auxiliary frame, a platen on the carriage, a set of type carriers on the auxiliary frame, and a set of key levers on the main frame connected with the type carriers for actuating the type carriers.

35. In a typewriting machine, the combination of a main frame, an auxiliary frame, said frames having vertically opposed upper end portions and lower portions at opposite sides thereof opposed transversely of the machine, vibration absorbing and sound deadening resilient material partially compressed between the said opposed portions of the frames, a platen carriage on the auxiliary frame at the upper end of said frame, a platen on the carriage, a set of pivoted type bars on the auxiliary frame below and forward of the carriage, and key levers on the main frame connected with the type bars to swing the type bars upwardly and rearwardly to the platen to print.

36. In a typewriting machine, the combination of a main frame, an auxiliary frame, said frames having vertically opposed upper end portions and lower portions at opposite sides thereof opposed transversely of the machine, vibration absorbing and sound deadening resilient material partially compressed between the said opposed portions of the frames, a platen carriage on the auxiliary frame at the upper end of said frame, a platen on the carriage, a set of pivoted type bars on the auxiliary frame below and forward of the carriage, and key levers on the main frame connected with the type bars to swing the type bars upwardly and rearwardly to the platen to print, means loosely interlocking the frames for limited up and down and lateral movements of the auxiliary frame relatively to the main frame, and vibration absorbing and sound deadening resilient material preventing transmission of noise producing vibrations set up in the auxiliary frame to the main frame through said interlocking means for the frames.

37. In a typewriting machine, the combination of a main supporting frame, a set of keys carried by the main frame, a set of type controlled by said keys for typing matter, a platen carriage, a platen on the carriage with which the type coact, and means supporting said carriage and set of type from themain frame for limited floating movement of the carriage and set of type as a unit relatively to the main frame and set of keys.

38. In a typewriting machine, the combination of a main supporting frame, a set of keys carried by the main frame, a set of type controlled by said keys for typing matter, a platen carriage, a platen on the carriage with which the type coact, an auxiliary frame supporting the carriage and set of type, and universally yieldable sound absorbing connections holding the auxiliary frame to the main frame to float relatively to the main frame and set of keys.

CARL GABRIELSON.

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