US1546692A - Typewriting machine - Google Patents

Description

July 21, 1925.

Y J. WALDHEIM TYPEWRITING MACHINE 3 Sheets-Sheet 1 Filed June 21, 1921 INVENTUR July zfflfszs;

J. WALDHEIM TYPEWRITING MACHINE 3 Sheets-Sheet 2 Filed June 21, 1921 lNvENTnig July 21, 1925.

J. WALDHEIM TYPEWRITII IG MACHINE Filed June 21, 1921 3 Sheets-Sheet 5 INVENTUR m, H15 ATTUR Patented July 21, 1925.

UNITED STATES PATENT OFFICE.

JOHN W'ALDHEIM, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEVJEETING MACHINE.

Application filed June-21, 1921. Serial No. 479,190.

To all whom it may concern:

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

This invention relates to sound-deadening devices for typewriting machines. The invention is of the same general type as that .disclosed in the co-pending application of B. C. Stickney, Serial No. 429,617. filed Dccember 10, 1920 (now Patent No. 1,519,224,

dated December 16, 1924), and comprises a sound-deadening casing or hood for enclosing the noise-producing parts of a typewriting machine, while the keys and other parts of the machine used in its operation project from the casing or hood.

The casing is so constructed that it can he slid upon a typewriting machine from the front thereof, the front of the machine entering the rear of the casing, which, for this purpose, is provided with a large in sertion opening. Vhen the machine is completely within the casing, the rear opening of the latter is closed, thus completely en closing the machine, to prevent the escape of sound.

A feature of this invention lies in the novel, simple, and effective closure means for the opening in the rear wall of the easing, said means being in the form of a door mounted so that it may be readily swung to open position to permit the casing to be ap plied to the machine and locked in closed position.

Another feature of this invention is the construction ofa front wall of .the casing to cover almost completely the front plate of the typewriting machine, and thus avoid the necessity of providing sound-deadening means for said front plate in addition to said front wall. For this purpose, the front wall of the casing is provided with an opening just large enough to permit the forward extension of the typewriter frame. in which are mounted the banks of keys, or, in other words, the keyboard section of the machine, to project therethrough.

A further feature of this invention is the construction of the front wall of the easing, so that said wall may he brought flush against the front plate of the typewriting machine without removing the ribbon-color shift-key. For this purpose, a hole is provided in the front wall of the casing large enough to clear the-ribbon-color shift-key.

.Provision is made for a slot at the front of the casing, through which various operating levers and finger-pieces, such as the line-space handle, carriage-return fingerpiece, and carriage-release-lever extend, so that the machine may be operated from outside of the casing. Means are provided for closing all of the slot not occupied by the levers and finger-pieces, in order to prevent the escape of sound, said means comprising cooperating cushions in the form of folds of sound-deadening material. It is a feature of this invention to provide means to increase the resiliency of the folds of sounddeadening material to cause them to return readily, said means comprising reinforcing layers of horse-hair as backings or linings for the folds.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a front view of the sounddeadening casing forming the subject of this invention, applied to an Underwood standard typewriting machine.

Figure 2 is a perspective view from the rear, showing the closure means for the opening in the rear wall.

Figure 3 is a detail of a cushion, comprising a fold of sound-deadening material used for closing the front slot and a backing of horse-hair for said material for increasing the resiliency of the material.

Figure 4-. is a side view, vertically sectioned, of the device, as shown in Figure 1.

.Figure 5 is a plan view of the device as shown in Figure 1, the cover having been removed to display the interior of the easing.

The Underwood standard typewriting machine comprises a main frame and a forward extension 11 of the main frame, in which are positioned banks of keys 12, said keys, when depressed, operating type-bars 13 to cause types 14 carried thereby to strike against a platen 15 at the printing point. Said platen is fixed upon a shaft or axle 16, journaled in the end walls 17 of a platenframe 18, mounted in acarriage 20 having letter-feeding movement on a front rail (not shown) and a rear rail 21 fixed to the r m and a cover part 41.

anism by a carriage-release-lever 31.

ill or deadening the sounds arising-inthe operation, there isprovided a sound deadening casing or'hood comprisinga body The body 4:0 comprisesa front wall42,-side walls 43, and a rear wall in the form of two end sections d4, spacedapartto provide a large opening l l 'sufficient to perinit passage of the type- Writingmachine therethrough and into the body part ofthecasing, said rear wall being of greater height than the height of the ,t-ypewriting machine. rissuming that the .typewriti11g machine rests upon a base, such as 50, the casingor-hood' may he slid along the base and ontothe Inachine'from the front thereof, asin my application, Serial No. 478,231, filed June 17, 1921. The cover l1 .isat this time raised sufficiently to :clear the line-space lever 26, the forward extension 11- ofthe ,typewriting machine entering the rear of the casing through the opening in .between end sections ed, and the casing being moved rearwardly until the front of the main framelO contacts withxpositioning abutment s '51 fixed to the front wall 42, the

forward extension 11 projecting through an opening 52 in the front wall 42. Said open-' ing 52 is just large enough tofpermit the forward extension of the typewriter frame to project therethrough, the front wall of the casing covering substantially allof the remaining portion of the usual frontplate 52 of the typewriter frame, thus avoiding the necessity-of linin'g'with a sound-deadening material the front plate, which is usually of thin metal capable of transmitting sounds.

Provision is, however, made of sound-deadening material in the form of asheet 42 between the front plate 52 of the typewriterframe and the front wall 42 0f the casing.

' salid sheet 4:2' may be attached to the rear face of the front wall 42 to serve as a lining therefor. l 'l Toperinit the ribbon-color shift-key 53 to project outside -ofthe casing at the front thereof, the-front wall 42 isprovided with- .an opening '54; large enough to permit the entire shift-key -to'project therethrough. Hitherto, it has been necessary with hoods, in which the front plate is integral with the casing, to remove the ribbon-color shift-hey from its shaft when the casing was to be i :applied, and again attach it to the end of the shaft after applying the casing, the shaft pro ecting through a small hole in the front and left.

wall. The opening 54 thus avoids the neces sity of removing the shift-key when the casing is applied. An opening 55 is provided in the'frontwall 42, through which the linelock release-key 56 pr jects and may be operated from outside the casing.

It will thus be see-n that, when the typewriting machine is positioned within the body-part of the casing, the forward eaten sion or keyboard section 11, the ribbon-color shift-key, and the line-lock release-keyproject outside of the casing. The body part is provided with extensions 60, above which the typewritercarriage operates to the right Themachine is thus enclosed at all times by thebody part at the front and sides thereof, but is open at the top and rear. To

close the top opening, there is providedthe cover ll hinged to the end sections 44 of the body part by means of a bolt, or rod, 61 passing through alternately arranged turnedover ends 62 and 63 of a rear wall 6% of the cover and the endsections id, respectively. lhe cover is thus hinged to the body part only near its ends, the lower edge of the rear wall 6 of the cover forming the upper edge of the rear wallof the body part between the end sections 44; The cover comprises a top wall or ceiling 65 extending forwardly and downwardly toward the front of the casing, side walls 66 provided with fla-ngesb? which rest upon ledges 68 of e:;- tensions 60, said ledges 68 being pr vide-d with embedded strips 69 of sound-deadening material, such as felt, and afrontwall 70, which may be separate or formed integral with the other walls of the cover. For permitting the typewriting at the interior of the casing to be viewed when the cover is in lowered position, the top wall is provided with a. transparent plate 71 suitably held, as 7 lVhen the cover is in closed or lowered position, there is still an opening or slot between the lower edge of the front wall and the upper edge of front wall through which slot project the lineespace handle 26, carriagereturn linger-piece 30', and carriagerelease-lever 31, so'as to permit ordinary operation of the macaine without raising the cover. It is necessary, however, toclose all of the slot not actually occupied by these finger-pieces or levers, in order to prevent transmission of sounds there through. For this purpose, two co-operat- 'ing cushions 7 1- and 75 are provided, said cushions comprising folds of sound-deadening material, such as plush, felt, or soft leather, the two-ply'edges of each fold being clamped between two bars 76-and 77, fastener together by bolts 77 to form single units which are mounted on the lower edge of front wall 70 and upper edge of front wall respectively by screws FT passing through holes 77 so that the folds contact. It has been found desirable to increase the resiliency of the cushions so as to return to normal more readily when distorted by the passage or operation of the various fingerpieces and levers. For this purpose, the folds of sound-deadening material are each backed or lined with a layer of material 78 composed of horse-hair (see Figure 3), the edges of which are clamped with the edges of the folds of the cushions between the bars 76 and 77.

The typewriting machine is thus completely enclosed at the front, sides, and top, but there still remains the insertion opening at the rear between end sections 44, the base 50 and the lower edge of wall 64, through which opening the machine entered the caing. For closing this opening, there is provided a closure member or door in the form of a cover-plate 80, having turned-over end members 81 forming bearings which are alternately arranged with the similar end members 63 of the cover, the rod 61 passing through members 62, 63 and 81 to hinge the cover to the body and to hinge the coverplate to the cover part. The height of the cover-plate is the distance from the base to the hinge, and its width is greater than the width of the opening, so that it overlies the end sections 44. To lock the cover-plate in lowered position, there is provided a catch 85 adjacent each side edge of the cover-plate and engaging in a slot 86 in the underlying end section 44, said catch being withdrawable from said slot when slid upwardly by means of a finger-piece 87 on a bolt 88, to which said catch is fixed, said bolt being guided in its movements by brackets 89 fixed to the cover-plate, the upward movement of the bolts being limited by projections 88 which engage the lower brackets 89. The cover-plate carries abutments 90, which, together with the abutments 51, hold the machine against movement within the casing, the machine having been previously positioned within the casing by abutments 51.

The sound-deadening casing, as described above, is preferably of metal, such as iron,

and the main metallic parts thereof may be formed in three sections, that is, cover, body part, and cover-plate. Each section may be built up or cast to form a unit. To support the casing more firmly on the base, the body part may have inturned flanges 91 at the lower ends of the walls, and preferably formed integral with the walls.

It will be understood that, by hinging the cover-plate on the casing, it may readily be swung into closing position, and the necessity of locating it relatively to the casing and the possibility of its becoming misplaced, which may be experienced with a detachable cover-plate such as shown in my application, Serial No, 478,231, above referred to,

and in my application Serial No. 466,820, filed May 4, 1921 (now Patent No. 1,519,645, dated December 16, 1924), are thus eliminated.

The casing may be lined with any suitable sound-deadening material, such as felt.

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

Having thus described my invention, I claim:

1. A sound-deadening casing for a typewritingmachine having a keyboard extension and a forwardlyextending key above said keyboard extension, said casing having at its front an opening just large enough to receive said extension, a second opening to receive said key and locating means to engage the front of the machine and assist in positioning the same in the casing, said casing also having an opening in its rear to re ceive the typewriting machine therethrough into position with the extension projecting through the front opening, and a door hinged at its upper edge to the casing proper for closing the rear opening and pressing the machine against said locating means, to cause the front of the machine around said key to co-operate with the front of the casing to prevent the escape of sound through the corresponding opening in the casing.

2. A sound-deadening casing for a typewriting machine, said casing comprising a body portion having side members fixed thereto and provided with overhanging lateral extensions to accommodate the travel of the typewriter-carriage, said side members being spaced apart at the rear to provide an opening of sutiicient width to permit the passage of the machine therethrough, a cover hinged at its rear edge on said side members at such a height as to permit the passage of the machine thereunder, and a door to close the rear opening of the body portion, said door being hinged to said side members to swing about the same axis as said co'ver 3. A sound-deadening casing for a typewriting machine having a keyboard extension, said casing comprising a body part, a cover, said body part comprising a front wall of unitary construction having an opening extending upwardly from the lower margin of said wall but large enough to permit said extension to be passed therethrough, locating means to engage the front of the machine and a rear wall formed by two laterally-spaced end sections, the space between the end sections being sufiicient to permit the passage of the typewriting machine therethrough and into said casing, said end sec tions having bearing members formed on their upper edges, a door for the opening in said rear wall, said door having bearing members at regular intervals, bearing members formed on said cover at regular inter- *"enou'ghto permit the passage of said keyboard extension, a rear wall formed bytwo laterally-spaced end sections, the spacebetween the end sections -being sufficient to permit'the passage of the typewriting' machine therethrough and into said casing,

"said cover being hingedat the rear to said 7 end sections, adoor hinged at its upper edge to said casing for closingthe space be-.

tween said end sections, said door overly- -'ing'said end sections,- and'means for locking *said door inyclosd position comprising a latch at each side of said door, each of said end sections having an opening through which the respective latch passes to engage the body:part,'said latches being shiftable torelease'the'door.

5. In combination, a sound-deadening casing,'a'typewritingmachine having a keyboard extension and fitted within said casing, said machine comprising a body from which a shaft projects forwardly, an en larged finger-piece on the front of said shaft, said casing having afiXed front wall of unitary construction coveringthe front of the machine body and'provided in its lower portion with an opening through which said keyboard extension is passed from the rear 7 and anopening to permit said finger-piece to project therethrough'as the machine is inserted in the casing from the rear of the latter, sound-deadening material between the machine and the front wall of the casing to close the opening between said machine fand'the edges of the opening in said front wall around said finger-piece, said casing having a rear 'wallhavin'g an insertion'opening of sufficient size to receive the machine, 'a'door for said insertion opening, and locating means movable to engage and locate the machine in proper relation with said front wall of the casing.

6. A sound-deadening casing,'a typewri'ting machine having a keyboard extension and "also having a front plate above said extenysion, and also having a ribbon-color shift- 'key and a line lock'release-key at the front of said front plate, said casing having a fixed front wall of unitary construction abovefithe keyboard and forward of said front plate and provided with an opening just large enough to receive said keyboard extension when inserted from the rear, and also provided with openings to accommo- "date the ribbon-color shift-key and the linelockrelease-key,.. and sound-deadening material between said front plateof the machine and'the front wall of the casingto close the openings between the frontr'plate such insertion, said casing also having'an insertion openingin its rear wall large enough to permit the passage of the machine, a door for said insertion opening hinged atrits upper edge to the casing proper, and a cover for the casing co-operating at its forward edge with the upper edge'of the front wall to provide a slot along which said fingerpiece may travel with the carriage and swingable upwardly to permit the insertion of the finger-piece into said slot when the machine is inserted into the casingfrom the rear, said cover being mounted on the easing so as to swing about the same axis as said door. 7

8. A sound-deadening casing for a typewriting machine'having a keyboard extension and a forwardlyprojecting key therei above, said casing comprising a front wall and a rear wall, said front wall having an opening to furnish a close fit for said-extension and an opening to-receive said key,

and said rearwall having an opening to permit the machine to be insertedinto the casing from the rear, and 'the extension and the key to be passed through the openings in the front wall, abutments on the front wall to engagethe machine to locate the c'as-i ing and themachlne relatively to each other,

a pivoted door to close the opening in the rear wall, abutments carried by said pivoted door to oppose the abutments on the front wall and clamp the machine in 'posi tion in said casing, and latching means to lock said door in closed position.

9. A 'sounddeadening casing for a typewriting machine having at its front akey movable in a vertical plane parallel to the" front of the machine. said asing comprising a front wall integralwith said casing and having an opening to clear the keyboard section of the machine, a separate openingto clear said key .to avoid interference in assemblingthe machine and'casin and a lining of sound-deadening 'material to oo-operate with the-front of said machine around said openings to assist in deadening-the sound.

10. In a casing for a typewrit-ing machine, including a frame and a keyboard, the combination of a body-part and a cover, the body-part having a front wall with an opening therein to permit the passage of the keyboard therethrough, and having a rear all with an opening therein to permit the passage of the typewriting machine there through, a swingable door arranged to close said rear opening, and co-operating oppo ed, clamping means mounted on the front wall and on said swingable door to engage said machine and clamp it into operative location in said casing.

11. A sound-deadening casing for a type writing machine having a keyboard-extcnsion, said casing comprising a body-part having a front wall of unitary construction, with an opening, extending downwardly be low the top margin of said front wall, large enough to receive said extension. and locating means to engage the front of the machine and assist in positioning said machine in the casing, said casing also having F11 opening in its rear to permit the passage of the typewriting machine therethrough into said casing with the extension of said machine operably projecting through the opening in said front wall, a door being pivoted near its top to the casing-body arranged to close the rear opening of the casing, press against the machine-frame and locate said machine in the casing, and a cover being hinged to said casing above the height of' the typewriting machine, arranged to swing about the same axis as the door, to give access to work in the machine.

12. In a casing for a typewriting machine, including a frame and a keyboard, the combination of a bod -part and a cover, the body-part having a front wall with an opening arranged to permit the keyboard to be passed therethrough, and having sitle walls, each of which is provided at its upper portion with an outwardly-disposed lateral extension, aranged to permit the travel of a typewriter-carriage therein in its opposite extreme positions, the cover being swingably mounted on said side walls and arranged to close the top of said casing and said extensions of said walls, rear wall-portions spaced apart and arranged at the op posite ends of said casing to close the rear of said extensions, separated by a rear opening in said casing, and a door, swingably mounted at the rear of said casing, arranged to close the opening between said rear wallportions, and in combination with said rear wall-portions, said extensions and cover,

when the latter is closed, forming a closed chamber for the movement of the typewriter-carriage.

13. In a casing for a typewriting machine, including a frame and a keyboard-extension, the ;ombination of a body-part and a cover, said body-part being provided with a front wall of unitary construction having an opening below its top margin to permit the passage of the keyboard-extension therethrough, end walls connected to said front wall, extending rearwardly and provided with outward laterally-extending, upper portions to permit the travel of a typewriter-carriage to its extreme positions of movement, said casing having an open top and an open back, a door to close the open ing in said back, a cover to close the opening in said top, and a supporting axis 1nounted on the opposite ends of said casing and spanning the opening in the back, said door and said cover being swingably mounted on said axis, said cover being arranged for opening to permit the insertion of said typewriting machine into said casing through said top opening, and said door being swingably mounted to permit said typewriting machine to be installed in said casing, through said rear opening.

14. The combination of typewriting machine, a sound-proof cabinet in which the machine is fitted, said cabinet including a top cover and a rear door hinged to each other for movement independently of each other and of the cabinet, said cabinet having ends hinged to and closed by said cover, said ends including the side walls of the cabinet and also including the overhanging portions accommodating the travel of the carriage of the typewriting machine.

JOHN lVALDHEIM.

Vitncsses EDITH B. LIBBEY, JENNIE P. THORNE.

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