US1553055A - Typewriting machine - Google Patents

Description

l/h vena# Aff@ 2 sheets-sheet 1 J. wALDHl-:IM

TYPEWRITING MACHINE Filad Nw.

Sept. 8, 1925.

Y J. WALDHEIM' TYPEWRITING MACHINE Sept. s, 1925.

Fixed Nov.

f1, 1921 2 Sheets-Shad.' 2

Patented Sept. 8, 1925.

UNITED STATES 1,553,o55 PATENT OFFICE.

JOHN WALDHEIM, OI LIZABETH, NEW JERSEY, SSIGNOB. TO 'UNDERWOOD TYPE- WBITEB COMPANY, F NEW YORK, N. Y., A CORPORATION OF DELAWARE.

'rrawnrrme MACHINE Application led November 4, 1921.

To all whom it may concern.'

Be it known that I, JOHN WALDHEIM, a citizen ofthe United States, residing in Elizabeth, in the county of Union and State I of New Jersey, have invented certain new and useful Improvements in Typewriting Machines, f which the following is a specification.

` The present invention relates to certainfeatures of a typewriting machine to adapt the same to a sound-deadening casing 1n which the machine mayl be operated; and to certain features of the casing for better adaptation of the same to operation of the machine therein.

Casings of this character have heretofore been provided '.with windows, for rendering visiblethe printing effected within the same. Ityhas been found that light, either artificial light or sunlight, striking the window-pane at certain angles, is objectionably reflected into the eyes of the operator.. v

One object of the present invention is the provision of means whereby the windowpane may be angularly adjusted to divert such reflection.

It is com-mon knowledge that reflection is A intensified or softened, according to the density of shadow of the background. Heretofore, thecaSings havelbeen opaque, excepty for the forementioned window, thus enhancing -reflection of light from the windowpane. .An object of the present invention is the provision of windows at the ends of, or elsewhere in, thecasing, to admit light to the l ipterior thereof beyond the window, through which the operator observes the platen; thus eliminating, to avlarge degree, all objection- 40 able.. reflections from the window-pane,

through which the operator looks.

It is desirable to adapt the casing to use with the machine on the usual folding or collapsible desk-board. Heretofore, the cas- '45 ings have been provided with covers, hinged ithereto at the rear, and have been provided with springs for assisting in the opening of the cover; the cover being held downagainst -the actionyof such springs by gravity. As

the casing-is tilted with the machine, in the operation of folding the Same into the desk,

on arriving at a certain position, gravity may cease to be effective to hold the cover in place, and the latter, urged by its springs, or by gravity, may swing open.

"of operation of the levers.

Serial No. 512,141.

An object of the present invention is the provision of means for locking the cover to the casing-body, which means ma be rendered ineffective during the operatlon of the machine, so that the cover may be opened at will, and lwhich may be readily, and in a simple manner, rendered eifective when the casing is to be folded into the desk, or otherwise tilted.

Casings of the character mentioned ordinarily have a slot extending horizontally across the front face thereof, through which protrude the operatingarms, such as the line-space lever, the carriage-release-levei'. and the carriage-return arm, and along which these arms travel with the carriage.

A These arms an the machine and the casing all being standardized, al1 of these arms on a given machine should register with the slot inany casing designed to receive such machine; and, vice versa, the slot ina given casing should be in registry with all of such arms on any machine intended for such casing. Lack of uniformity, such, for instance, as may bedue to wear of, or injury to, the feet of the. typewriting machine, or

Ybending of the arms, may result in occasions where one or all of the arms do not register with the casing-slot. Inv such instances, the arm will bind or unduly bear upon one or the other wall of the slot, and freedom of movement be thus impaired. A com aratively light pressure of the line-spaceever or the carriage-release-lever, for example, may be sufficient to prevent return of the same, after their operation, to normal position, by the springs designed for this purv pose; or such pressure of any of these arms or levers on the walls of the slot may prevent the proper letter-feed movement of the carria"e b the spring-drum. not er ob]ect of the invention is th provision of means whereby these arms or evers may have vertical play, so as to accommodatev themselves to the slot along which they travel, regardless of any defect or lack of uniformity in any part of thel casing or machine. It is a further object of the invention to provide for this.y play without in any way impairing the accuracy In connection with the line-space-lever, -for instance, a. feature of the invention is the provision of means whereby this play is provided without producing looseness or play lin the hori- 110 piece of the carriage-return-arm, an

zontal plane in which the lever has its normal operation.

In typewriting machines, whether or not for operationwithin' the casing, but more particularly for operation within the casing, the carriage-release-lever has been mounted upon the carriage-return-arm, or in such proximity theretoas to permit the linger-pieces of both lto be engaged by one hand, so that the carriage-,release-lever may be pinched toward'the carriage-return-arm in the operation thereof. Thls pinching is best eli'ected by engaging the carriage-return-lever with the thumb in horizontal position, and the carriage-release-lever with the forefinger in vertical position. v

A feature of the invention is a vertical placement or disposition of the fin erorizontal placement or disposition of the finger-piece of the carriage-release-lever; the linger-pieces thus being at right angles tok each other, as are the thumb and forenger by which they are engaged, and being in the positions naturally adapting the same for engagement andoperation bythe hand.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a view, in side elevation, of the assembled machine and casing, the casing being in cross-section and broken away, to show certain features of the machine and casing. v

Figure 2 is a cross-sectional view, in side elevation, through the top of the casing, to illustrate a mounting of the window-pane.

Figure 3 is a View similar to Figure 2, showing a diiferent adjustment of the window-pane.

Figure 4 is a front view of the cover, broken away and partly in cross-section, to show certain details thereof.

Figure 5 is a perspective view of the linespace-lever, the handle being broken away.

Figure 6 is a front view, in cross-section, of the line-space-lever and the carriage-bar on which it is mounted.

Figure 7 is a side view, partly in crosssection, of the part shown in Figure 6.

Figure 8 is a top plan view of the carria e-return-arm, the carriagerelease-lever, an certain connections to the same.

Figure 9 is a View, in side elevation, of the carriage-return-arm; the connections of the same to the carriage front rail being shown in cross-section.

Figure'lO is a side view, in cross-section, through the carriage-release-lever, and through the connections of the same to the carriage front rail.

The casing is shown as comprising two princiglal castings, one of which 10 constitutes, t e body of the casing, and the other of which 11 constitutes a cover hinged at 12 cmachine, indicated in dotted lines in Figure 1, issup orted by frontend rear feet 18 and 19. he keyboardextension 2O of the typewriting machine projects through a suitable opening in the front Wall of the casing, and suitable sound-deadening linings (not shown) are provided at the front of the casing. The typewriting machine is shown as anchored by bolts 21 in much the usual way to the platform 16. The platform 16 and felt bottom of the casing are perforated for loose passa-ge therethrough `of the bolts 21; and, to prevent emission of sound through the bolt-openings, washers 22, of felt or other sound-proof material, are inserted under the heads 23 of the bolts. The bolts 21 thread into the usual lugs 24 on the frame 17 of the typewriter. In the present instance, the casing, not being liftable independently of the typewriting machine, is therefore indirectly held to the platform 16 by the bolts 21.

For assisting in the opening of the casingcover, there is provided, at each side of the casing, a spring (not shown), concealed Within a cylinder 25, which spring bears at one end against one end of its cylinder, and at its other end against a piston on a rod 26. The rod 26 is secured at 27 to the casingcover; and the cylinder, in Which'it slides, is secured at 28 to the casing-body. Brackets 29 and 30 attached, respectively, to the cover and the casing-body, serve as anchors for the rods 26 and cylinders 25, respective ly. Metal strips 31, 32, laid against the inside of the edges of the linings 13 and 14, respectively, and running longitudinally of such lining-edges, are secured to the body and over castings by y*screws 33, and thus serve to hold the linings at their edges.

Normally, gravity sulices to hold the cover closed; in which position (see Figure 4) the lining-strips 14 at the sides of the cover rest upon the casting l() of the bodypart. Ribs 35, formed in the side or end Walls of the cover-casting, serve as reinforcements therefor, and as abutmentsv for the lining-strips 14. When the casing with the machine is folded back into the desk/a sulicient distance, gravity may no longer serve to hold the cover to its seat on the casing-body; and, at such times, to hold the Cover to the casing-body. a lock or detent is provided. This lock or detent (see Figures 1 and 4) consists of a spring-arm 37, pivoted at 38 to the casing-cover, to have movement thereon to the full and dotted line positionsof Figure 1. .The distal end of the spring-arm 37 carries a bolt or lock-pin 39. Normally, that is to say, when the niachine is in osition for operation, and when it may be esired to open the cover, for any purpose, the arm 37 is in the full line, Figure 1, position, sprung or bent out, with the pin or bolt 39 centered and resting in' a recess 40, also in the cover end Wall.I Before the machine and casing are folded back into the desk, however, the arm 37 is swung to the dotted line, Figure 1, position, at which time, the bolt 39 is brought into registration with a hole 41, which passes entirely through the end wall "of the cover, and which hole 41 is in registration with a hole 42 in the end wall of the casing-body. At this time, the spring-action of the arm 37 causes the bolt 39 to enter the holes 41 and 42, thereby locking the cover against move,- ment on its hinge 12.

In the forward upper part of the cover, is a window, formed by a rectangular ribbing 45 in the cover-castin This ribbing has the function of a reinforcement for the cover, and also serves, as indicated at 46 in Figure 1, as an abutment for the coverlining-member. Within the window, formed by the ribbing 45, is a Window-pane 47, of glass or other transparent inaterial. At either end, the window-pane 47 is perforated to receive screws or rivets 48, by means ofwhich it is attached to, and supported upon, the anges 49 of brackets 50. The brackets 50 are pivotally secured to the ribbilig 45 of the cover-casting-by means of pins or screws 51 (see Figures 1 and 4). Upon loosening the screws 51, the pane 47 ma be set at any an le within its'frame, an upon tightening t e screws 51, will be held at the angle at which it is so set.- By adjusting the angle of the window-pane in this manner, any undesirable reflection of daylight or artificial light may be turned from the operators eyes. lA lining 53, of felt, leather, or other sound-deadenin material, is secured by screws 54 to the ri bing 45. The window-pane 47 is slightly wider,

i fore and aft, than the frame formed bythe felt 53; and the edges of the pane are rounded, as at 55, so that, in adjusting the pane, the edges thereof maybe moved along and held by theuyieldable lining 53.

Figures 2 iand`3 show amodified form of adjustable window-pane. In the structure shown in these figures, the ribbing 45 is provided, at the outer face of the cover, with a peripheral flange 56, against which the front or rear edge-of the window-pane 'is adapted to be set. The window-pancia ofl greater width, fore. and aft, than the' framel formed by the ribbing, and so is set diagonally in its frame. It is held in its frame by clamps, consisting of fingers a57, secured to the inner face of the ribbing by screws 58. These clamps are disposed in various positions around the window-pane, on the front and rear thereof. Spacing- Vstrips 59,' of .wood or other material, bear against the front and rear edges of the window-pane. vIn Figure 2, the strip 59, at the rear of the window-frame, lies between the window-pane and the clamp 57, and holds that edge of the windowane tightly against the liian e 56 of the ri bing. The stri 59, at the ront of the window-frame, in igure 2, on the other hand, lies between the window-pane and the flange 56 of the ribbing, thereby holding -the front edge of the Window-pane tightly a ainst the clamp 57. The stri s 59 are pre erably bound b felt or like shock-absorbing strips of yield able material 60. It is designed that, after the pane 47 and the strips 59 are in place, the clamps ma be tightened against the yieldable bindings 60, and the window-pane thereby so held in its frame that all joints are closed and rendered sound-proof. The

formed into the arrangement shown in Figure 3 by loosening the clamps, taking out the window-pane and the strips 59; positioning the rear strip 59 against the flange 56; setting the window-pane in, with its front edge against the flange 56, and its rear edge against the strip 59; positioning the front strip 59; and applying the clamps. This `simple operation, it will be noted, has en- -translucent material. Each window-pane 66 `arrangement shown in Figure 2 is transis set against a smaller peripheral flange 67 v on the window-frame 65; and clamps 68,

similar to the clamps 57 are disposed around the insideof the window-frame, to hold the window-panes 66 to their seats. Suitable sound-deadening and shock-absorbing strips 69 are positioned between the Window-panes 66 and their seats 67. The clamps 68 are held to the inside faces of the flanges or ribs 65, forming the ends of the casing-cover.

The typewriter-'carriage 70 is mounted to have letter-feed and return movement on a rear rail 71 I and a front rail (not shown) on thetypewriting machine. The platen 72 is mounted for rotary movement in the platen-frame 73 on the carriage. The carria e .is driven b the usual spring-drum an is controlled y a pinion (not shown), which meshes with a rack -(not shown) on the carriage. To release the carriage from such control, the rack referred to is liftable out of engagement with the pinion a lever 74 being provided for this purpose. The carriage-controllingv and release connections, just mentioned, are those found in the Underwood standard typewriting machine. The line-space mechanism of the Underwood machine comprises a ratchet-wheel not shown) on the platen-shaft, and a, pawl not shown), for engagement with the ratchet-wheel; the pawl being mounted on a slide'75 for reciprocatory movement. For operating the pawl, there is provided a bellcrank-lever, having pivotal movement in a horizontal plane on a pivotin 76 on the carriage-frame. One arm 7 of the linespace-lever is adapted tol engage and actuate the pawl-carrying slide,- and the other arm 78 carries the finger-'piece or handle for operating the lever. A carriage-return-arm 79 is also provided.

The carriage-release-lever, the line-spacelever and the carriage-return-arm, shown in the drawings, are not precisely of the shape and style commonly found inthe standard L Underwood. machine.

This is because the machine is here shown as adapted for* operation within the sound-deadening caslng,`

and it is desirable that the levers, referred to, be extended to the outside o'f the casing, whereby they are accessible to the operator.

v Where the levers thus protrude to the outside of the casing, the casing must be slotted, to permit of movement of the levers, along the front thereof, with the' carriage as the carriage has letter-feed and return movements. In Figure 1, the several levers, referred to, are shown as extended, and `bent so that all of them ma protrude through a single slot. The w ls of this slot are formed by two cushions 80, each of which i cushions comprises an inner tubing of rubber or other resilient 'material 81, supported in a strip of feltsSZ, the ends of the felt strip being brought togetherA and held to the inside front wall of the casiuby metal strips 83, through which and t e gathered ends of the felt strips 81, screws 84 pass, and are threaded into the casing front wall; The cushions are of sound-deadening material, and are resilient, so as to close the slot, except where the levers interoede.

Referrin to Figures 1 andl 8 of the drawings, it wil be noted that,`on the front rail 86 of the carriage, there is @plate-87, secured to the rail by a clamp 88 and a setscrew 89. Screws 90 and `91 hold the plate `8'? and clamp 88 together. l Screw 91 has a further functionvofservng as a pivot for v lindrical.

a carriage-rel -lever 92, having a 'fingerpiece 93, on ne armY thereof, and having, on another arm 94, a yoke 95, which engages an upturned part 96 of the carriagerelease-lever 74, heretoforel referred to. Movement ofthe finger-piece 93 to the left causes the arm 94 to be rocked forward, and 'the lever 74 to be swung forward and downward; lay being allowed at the yoke 95 for such ownward swin of the lever 7 4. Referring to Figure 1, it will be noted that the 'lever 92, between its pivot 91 and the finger-piece 93, has a downward bend to a pomt opposite the line of contact of the two cushions 80, and is then offset horizontally forward.- v

As hereinbefore mentioned, typewriting machines of a given make and standard are Supposed to be' interchangeably usable in the casing, and, vise versa, casings, such as shown', are supposed to be'interchangeable for a given machine. Likewise, the levers aresupposed to be standardized, sothat one may be replaced by another on a given machine, and so that, when thus mounted upon the machine, their horizontal offsets will `be in registration with the slot formed by the cushions 80 In event of failure of an arm or lever truly to register with the slot, the pressure of one of the cushions thereon may be such as to interfere with its freedom of movement, or with the movement of the carriage. The springs for returning the lever-and vthe carriage may not be strong enough to overcome such pressure and friction, and thus the carriage may, fail to feed forward, lor the lever fail to reurnfto normal position. This condition may apply to` the carriage-release-lever, .to the carriage-return-arm, or to the line-space-lever; and the `possibility that all three of the levers and the line'of the cushion-slot. The manner,

in which this4 fiexibility of the several ,levers and arm is obtained, is as follows:

Referring to Figure 10, it will be noted that the hole '100 in the carriage-releaselever 92, through which holethe pivot-pin 91 passes, and which hole forms the bearing for the lever on the pin 91, isnot truly cy- In the fore-and-aft cross-section shown in Figure 10, the walls of the "hole 100 are shownr as rounded outwardly at 101, both above and below the medial horizontal line., This'roun'diug orI tapering oi of the bearing of the lever 92A on the pin 91 permits-the lever to have a slight up-and-down rocking movement. If, therefore, the :horizontal o'setof thelever to itsfin erieee 93 is not in true alignment with t e ot proment of the carriage-return-arm is shown in Figure 9. 'It will be remembered that the carriage-return-arml requires no pivotal movement inV a horizontal plane upon its support. The carriage-return-arm 79 is shown as pivoted at 103, for up-and-do-wn movement on an ear 104 on the plate 87. Ak /screw 105 passes vertically through the arm 79 and into the plate 87.` The opening for the screw 105 in the arm 79 is large enough j to allow play up and down of the lever on its pivot 103. The head of the screw 105 serves as a stop to limit 'the u ward play of the arm. The arm 79 bends own from the carriage-rail, on which it is mounted, to a oint substantially opposite the slot formed y the cushions 80, whence, 'like the carriage-release-lever, it is offset horizontally outward through the cushions to its finger-piece 106. The up-and-'down play of 'the carriage-return-arm is indicated by the dotted lines in Figure 9.

Y For providing an up-and-down play of i the line-spacelever, the bearing thereof on itspivot-pin 76 is rounded off at 107` (see Figure 7), above and belowy the medial line,

after the fashion indicatedin Figure 10, in connection with the description of the carv riage-release-lever. As indicated in Figures 6 and 7, however, the-rounding or tapering 107 of the bearing of the line-space-handle, as well as that of the carriage-release-lever 92, is only in a fore-and-aft direction; in the longitudmal cross-section shown in Figure 6, no such rounding of the bearing is shown. Figure 5 illustrates the selected shape of the bearing-hole 108 for the line-space-lever. In this figure, the pin-hole at its top and bottom is shown as oblong, having rounded forward and rear ends and'iiattened sides. Thus, while the line-s acc-lever has an upand-down play on its ring pin in a vertical plane, it cannot be twisted or rocked laterally. This provision against lateral twist is to insure proper engagement of the arm 77 with the pawl-carrying slide.

It has been noted that the carriage-returnarm and the carriage-release-lever are mounted on.the same'plate 87. on the carl riage-returnarm. This mounting of the carriage-return-arm and the release-lever enables the operator to engage the carriagereturnarm nger-piece 106 with his thumb,l

and, at the same time, to engage the fingerpiece 93 on the release-lever with his forer. While thus engaging the {ingerpiece 106 of the carriage-return-arm, the release-lever is pressed' toward the carriage- 106. When the finger- pieces 93 and 106 are thus seized, the natural osition for the thumb is a horizontal positlon, and the natural position gf the foreiinger, which bears upon the carrlage-release-lever, is al vertical position; otherwise the hand must be twisted. Best to ada t the finger-pieces for such `operation, the ger-piece 106 of the carriage-return-arm (see Figure 9) is shown as vertically disposed; and, as indicated in Figure 8, may have a suitable curvature on the left-hand side thereof. For best adaptation of the finger-piece 93 of the releaselever to the vertical position of the forefin er, the finger-piece 93 (see Figures 1 an 8) is horizontally disposed, and may be suitably curved as at .109. In other words, just as the thumb and forefinger are naturally at right angles to each other, so, in

Variations may beresorted to within the.

scope of the invention, and portions of the improvementsmay be used without others.

Having thus described my invention, I claim: "W 1 1. A sound-deadening'casin for a type-` writing machine, having a wor -observation window-panelI mounted for adjustment to avoid objectionable refiection of li ht, and means keeping the windowane cosedv at all. adjustments, whereby sai window-pane, irrespective of its adjustment, co-operates with the casing t'o confine sounds accompanying the operation of the typewriter.

2. A sound-deadening casing for a typewriting machine, comprising a work-observing window-pane angularly adjustable to deiect objectionable light rays from the line of vision of an operator viewing the work and means for maintaining a sound-proof seal at the periphery of said window-pane to keep the window closed when adjusted to its severaldiierent positions.

3. A sound-deadeningcasing for a typewriting machine, comprising an opening in the casing, a work-observing window-pane adjustable in said opening to deflect ight rays from an o rators lineof vision when viewing work 1n the machine, and sounddeadening means co-o erating with both the window-pane and e periphery of said opening to maintain a sound-proof sealto keep the windowclosed throughout the entire movement of'said window-pane to adjusted position.

4. A sound-deadenin'g casing for a typewriting machine, comprising a windowframe, a work-observing window-pane adjustable in said frame to deflect objectionable rays of light from the line of vision of an operator when viewing the work, and

sound-deadening means linin the periphery of said window-frame, an co-o rating with the periphery of mid 4win ow-pane throughout its entire adjustable movement, to maintain a sound-proof seal between said Window-frame and window-pane and thereby keep the window constantly closed.

S 5. In 'a sound-deadening casing for a typewriting machine,l a lwindow-frame, and

a non-opening work-observing window-pane angularly adjustable therein to avoid objectionable reflection of light, the frame being extended in depth to permit substantial angular adjustment of the pane without opening the window.

6. In a sound-deadenin casing for atypewriting machine, a winow-frame, an ob'-- servation-window-pane angularly adjustable therein to avoid objectionable reflection of light, the frame being of a depthfto permit angular adjustment of the pane without causing the edges of the ane to protrude from the frame, and a yiel able sound-deadening lining for the window-frame, against which 4lining the edges of the ane are adaptedto bear, in the several adjustments thereof.

7. In a sound-deadenin "casing for a typewriting machine, a win ow-frame, an observation-window-ane angularly adjustable thereinto avoid o jectionable reflection of light, the frame being of a depth to permit angular adjustment of the pane without cans' the edges of the ane to'protrude from t e frame, and a yiel able 'sound-deadenin lining for the window-frame, against whic lining the ed es of the ane are adapted to bear, in t e several adjustments thereof, the edges of the pane being rounded or tapered, to allow the same to be ressed into, and moved along, the as t e pane is adjusted.

v8. In a sound-deadening casing for a typewriting'machine, a window-frame, a workobservin window-pane angularly adjustable in t e window-frame while remaining closed to avoid objectionable reflection of light, and means, including strips set in the frame, for holdigl the closed pane inthe various angular justments.

9. In a typewriting machine, a forwardlyextending ine-s ace lever, and a bearing on which the lever 1s pivoted to have horizontal 55 line-space movement, the engaging portions of the lever and bearing being so constructed vthat the lever has play in a forwardly and 'rearwardly extending vertical plane, and is held against play in a vertica plane per -pendicular to the first.

10. In a typewriting machine, a vertical.

pin and4 a orwardly-extending line-s ace lever having abearing on said pin, the re of said bearing being rounded or tapered in vopposite directions from front to rear on opposite sides of the pinV and on oppositev sides of the horizontal medial plane of the bearing, to provide for pivotal play of said lever 1n a forwardly and rearwardly extending vertical plane.

11. In a typewriting machine, alcarriagerelease lever and a mountingyfor s aid lever providing for a horizontal. release movement, said mounting being so constructed as lto rmidpivotal movement of the lever in a orwa y and rearwardly extend' vertical plane, while preventing lateral rocking of the lever.

12. In a t pewriting machine, a traveling carria e, a finger-piece extending forwardly from e carriage, and afin er-piece-mounting on the carriage to provi e for an operating movement of said finger-piece in a horizontal lane, Asaid mounting being so cons'tructed) as to provide for a pivotal movement of said linger-piece in a forwardly and rearwardly extending vertical plane, while preventing lateral rocking movement.

13. The combination with a sound-deadenv'ing typewriter-casing having a slot extending across the casin and yieldable slotsealing means extending along the slot, of a typewriting machine having a carriage, a horizontally-swingable o erating lingerpiece projecting forwardy/ through said slot, `and a mounting for said finger-piece to provide for automatic adjustment of said finger-piece to theproper height for said slot by permitting a pivotal movement of the linger-piece in a forwardly and rearwardly extending vertical plane, while preventing a lateral rocking of the finger-piece.

14. In a typewriting machine, a carriagereturn-arm pivoted to have up-and-down play on the carriage, and a headed screw passing loosely through the arm and into the support therefor, the head of the screw serving as a stop to limit vand determine the amount of pla l5. The com ination with a sound-deadening typewriter-casing having a slot extending across the front thereof, wof .a typewriting machine having a carriage-return arm projecting through said slot, and means for providing play for the arm in a vertical plane, the arm being held against horizontal movement on thecarriage.

16,. In combination, a typewriting machine, a sound-deadening casing 1n which 1ng,'and means to provide play for the lever in a vertical plane, so that the lever may ac- 'commodate itself to the position of the slot.

17. In combination, a. typewriting machine, a sound-deadening casing in which the machine is held, a line-spacelever,-' a carriage-release-lever, and a carriage-return u arm, al1 mounted on the carriage, the casing having a slot through which sald levers and arm protrude, and along which the same move with the carriage 1n the casing, and

means providing play for saidlevers and,

arm in a vertical plane, Whereb the same are all brought into registry an accommodate themselves to the 'position of the slot.

18. In a typewriting machine, a carriag return-arm having a finger-piece vertica disposed thereon, for engagement by the thumb, and a carriage-release-lever having a finger-piece horizontall disposed thereon, for engagement by the oreng'er.

19. In a tpewriting machine, a carria ereturn-arm aving -a finger-piece vertica ly disposed thereon, for engagement by the thumb, and a carriage-release-lever having a linger-piece horizontally disfplpeedm thereon, for engagement by the forze ger, the re lease-lever being pivoted to the carriagereturn-arm.

20. In a typewriting machine, a carriageely return-arm havinga. lnger-piece vertically disposed thereon, for engagement by the thumb, and a carriage-releas'e-lever having a inger-piece horizontally dis osed thereon, for engagement by the fore ger, the release-lever and return-arm being adjacently located, so that they can be pinched together by one hand.'

21. A sound-deadening casing for a t ewriting machine, said casing and mac ine being mounted on a drop leaf of a desk, said casing having two-sections, namely, a body-part anda cover-part hinged to vsaid body-part, and a bolt on one of said sections, said bolt "being movable to a permanent effective position and a permanent ineffective position, said bolt connecting both sections to prevent the opening of the coverpart when the bolt is in its effective position to keep the cover-part closed whenfthe drop leaf is swung into the desk with the machine and the casing; v

JOHN WALDHlEIM.

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