Typewriting machine

Abstract

Claims

April 21, 1925. J F. ALLARD TYPEWRITING MACHINE Filed May 13. 1921 3 Sheets-Shoat 1 Aprll 21, 1925. J F. ALLARD TYPEWRITING MACHINE F'iledllay 13, 1921 3 Sheets-Sheet 2 l KAI/l ///////v Patented Apr. 21; 1925. umren STATES orrrcs. J mm AnLAsn, or sseoKnYN, new seem. essre sen To UNDEJBWOOD TYP winrr m comrezw, OE NEW YORK, N. Y., A CORPORATION or nnmwenn X EWB T Q ACHINE- mime ed M y 1 i To all whom it may concern; e i inow at I, J FRANK AWN? a citizen of the United States, residii a in w r yn lict eg s he ewe-tr f Kings, city and State of New York, have invented ce ytain new and useful improvements in 'lypemriti g Machines: of which. the following; is a specification. v h s i v t e stestsoimdleede ins W wls or c sings for i rew tii g ma hine and is in the natui of improvements. on such casings a e-shown in the application of Joh e l mi Ne. ,82 led use 1 192i. y Y ,In casings, of this kind, in order to] have the same as light as possible, it has been proposed to make them o f'thin sheet-metal rein'li o ced with skeleton frai'nework. v The hinged cover of thecasing is greatly in lengthenech so as to be suifioiently roomy to accommodate the trzuveling carriage oi? the typewriter. Nevertheless this expansive cover must be light, because, has to be raised quickly and Lowered quickly at frequent intervals, and must not tire the open ator, nor can it be self-destructive beeause o'li its momentum, when, arrested; in its upward and downward; movements. The cover therefore n'iust be in thenature of thin sheets o l} metal. Notwithstanding such Wealmess, itmust be stilt as otherwise it could not fit accurately and reliably to ghe to-p ofi the body of the casingover the greatly extended lines of contact. This condition is difiies cult to meet, because a large- Weel; structure tends to get into a skewed org-Warped condition, thereby preventing full closing the cover down upon the body, and leaving cracks throuehwhich sound may escape de- 4o testing the advantage of soundemuflling casing Both the roomy cover; and the roomy body of the Weak casing are subject to the same trouble of becoming; arped n various Ways, whereby close. fitting: of one 4 to the other is not secured, and hence the cover cannot be eminpletely closed. This trouble is particularly present informer casings, Where the Walls, being: made separately and then joined together, have lines of weakness atthe cornetsor joints which in; "eases the susceptibil' y ofthea body and Coyel; to the skewing arping trouble mentioned. These and; other troubles QJ'QOVGICOHlfiJby ree s ri n 9 9,11 prov d ng o h av edy sad. t cover ti thin Walls, yet with great stifiness at the corners in place oi: great wealmessg and w th utehi ity o ske ing or W ping- 0 either the body or the cover, and with asurance t t the cov rt nd dy t a ways c'lpse tightly along all; lines. The cover; moreover is'of the requisite lightness, notwithstanding its. cumbersome size and form, Th ove cens sts 0. a s ngl diea n of; relatively Light structural metal, the Walls being SUbst alltlialflly thinner and mueh lighter than would be pract cable with brass or other ordinary eastings andthe corners contribut-i g elements ofrigidity and stillness, asmus as the nd ide Walls f he cas ing const tut flang t gr wit the front, rear and top Walls, forming a struct r f g ea ti l ess, l h ug igh g nd notwithstanding its enormous proportions. The body is also requ'red to; be of light c0ustructio1i, notwithstanding its great size, and not to be susceptible to bending and Warping, for reasons above given in connection. with the cover; and; to this end; the body is devised of a back and side walls forming asingle Che-casting of light structural material; whereby the alls maybe made thinner than would be practicable with brass or other ordinary castingg while the side Walls serve as, flanges for the back Wall, producing; boxing which is o'pen at its. front: for the introduction of the typewriter keyboard therethrou-gh; a vertical cross-plate connecti g said side alls aboye the keyboard, and contributing to} the rigidity of thestructure; said plate being preferably detachable andibolted to the side The side Walls are placed nelatiyely close to the: side of thetypewriter and have overhenging on outwardly'extending; portions coy-extensive with the coverand co-operatingqtherewith to form chambersto acoonnnodate the travel of the confined earriege tljlese vided with lugs having holes to align with holes in co-operative lugs on the casing, so that bolts may be inserted into said openings to secure the plate in place. Other features and advantages will hereinafter appear. In the accompanying drawings, Figure 1 is a sectional side view of the casing as seen from the right-hand end, and shows the cover plate detached from the base. Figure 2 is a combined front elevation and section of the casing. Figure 3 is a top plan view of the casing without the cover, and showing the front plate detached. The various parts comprising the casing are cast of any well-known material suitable for die-casting purposes. The casing comprises a base or box-like body portion 10, to which is pivoted a cover 11 by means of a hinge 12, the forward edge 13 of the cover forming, with the upper edge 14 of the front wall of the body portion, a slot 15 through which various handles, including the linespace handle 16, the carriage-return handle 17 and the carriage release handle (not shown) may project, so that the platen 18 of a typewriting machine 20 within the easing may be line-spaced and the carriage 21 thereof returned to the beginning of a new line without lifting the cover 11. The body portion 10 comprises two angular side walls 22, a front wall 23, and a rear wall 24. The rear wall has at its upper edge a re-enforcing rib 25 from which e: tend rounded projections or knuckles 26 forming the lower part of the hinge 12. The rear wall 24 is also provided at its lower edge with a re-enforced rib 27, from which extend vertically upward two re-enforcing ribs 28 to strengthen the wall 24, said wall being further provided with two short ribs 30 near the ends thereof. Each end wall is provided with a lower base rib 31, which is a continuation of the rib 27 extending along the bottom of the rear wall. Two ribs 32 extend first upwardly from the rib 31 along the vertical. part 29 of the side wall 22, then over the horizontal portion 33 of said wall, and then again verticall along a second vertical portion 34 of said wall (Figure 2). The ribs 32 terminate in upper ribs 35 extending along the upper edges of said walls and forming ledges to support the cover when the casing is closed. The front wall 23 of the body portion may be provided with an opening 36 to facilitate the insertion of the machine 20 into the casing, thus forming two end portions 37, the latter being re-enforced by horizontal ribs 38, which form continuations of the upper ribs 35 of the side walls and extend vertically downward along the inner edges of the end portions 37. A detach-- able cover plate 40, hereinafter described, is provided to close the opening 36 in the front wall after the machine has been placed within the casing. The cover is dome-shaped and provided with a rear wall 41 having at its lower end a rib 42 from which extend knuckles 43 to form the upper part of the hinge 12, the knuckles 26 and 43 being alternately arranged as in Figure 2, and perforated to receive the pin 44 of the hinge. The cover is further provided with two side walls 45, which are joined by the rear wall 41, the latter curving upwardly and forwardly and terminating at 46, and a cross-bar 47 at the front. An opening 48 is formed between the forward termination 46 of the rear wall and the cross-bar 47, so that a worksheet around the platen 18 may be observed. To close the opening 48, there is provided a glass plate 50 supported at its forward end within a groove 51 in the front bar 47 and at its rear end by clamps 52 secured to a rib 53 formed at the end 46 of the continuation of the rear wall, the clamps being held in place by screws 54. The side walls of the cover are reinforced by three ribs which extend vertically downward along said walls and terminate in horizontal ribs 56, said horizontal ribs engaging the ledges of the body portion 10. Strips of felt 50 are provided on said ledges 35 to facilitate a noiseless closing of the cover. To keep the slot'15 closed, through which the handles 16 and 17 project, so as to prevent emission of sound from the casing while the typewriter is being operated, there is provided a slot-closing cushion 57 secured to the lower edge 13 of the front bar 47 of the cover, said cushion being oppositely disposed to a co-operative cushion 58 secured to the upper edge of the removable plate 40. the handles 16 and 17 being readily movable between said cushions. To assist in locating the machine within the casing, there may be provided abutments 60 cast on the rear wall 24 and extending forwardly therefrom, each abutment being provided with a cushion 61 of sound-deadening material to engage the rear corners or posts 62 of the machine. After the machine has thus been located, the front plate 40 may be against the front wall to close the opening therein. To asset in locating and fastening the front plate hi. it may be provided with lugs 63 to be inserted between co-operative lugs G l on the front wall, the lugs 63 and 64 having holes 65 and 66, 1espcctivel into which, after they are brought into alignment. there may be inserted bolts 67 one at each side of the casing, the bolts 67 being provided with fingerpieces 68 to facilitate their manipulation. The front plate is provided with abutments ltit) within] the casing. The front plate has a cutout so may straddle the usual keyboard section 749 of the machine. A finger-piece 69 is cast on the front bar ATby the cover may be n'ia-nipulatedl: It willbe understood that the'casing niay belined with felt 7561: any other suitable material: The felt at the ear may e P o ded wi groves to which the ribsfit, thus providing an unbroken; siir face on" the interior oft-he casing o prev nt he r shee 1 1 being ca h while traveling back and torth with the carriage, i p i v Variations may be resorted to within the scope of the invention, and portions of the mp ev meets may b e t itho t O he Hev ns hus de e bed my nt sm I claim; i v v e. casi or a yrewrit s.m ne the combination oi a cast body portion coni- Prisins' Sidew l srwnfm'i es i e r t on he si e let as cover compris n Side walls, re-enforcing ribs cast on the-sidewalls of; said cover, cast ribs extending along the edges ofthe side walls of the body porr tien o orm e es; e dy i st ibs. ex n in along tllQl'QWGfi edges of the side walls of said cover to rest upon said" ledges. I esving fe yremiit ema h e he l b net ee Qt e stfb dy Pie t prising side walls, re-enfor cingrlbs cast on the s de well a, c t Q pi rr ne' i e Walls, te n-r ,cing ribs cast on the sidewalls f ir-id ov n z t e xt n les t e t p e ges o he i e ll f e body po jtionto form ledges, east ribs extendingalongthe lower edges. of the side i llsof Said bwr te net no- 1 se i iledges, ee fq'r ns r b? wet he 1.19.1261 edge of said body pbrtion, a. re-enforcingrib cast on the lower edgeoi' the cover, ei'forated projections on said two last-named ribs, and a rod extending throng'hthe perforated projections to fprin a hinge for said cover. 1- In a wens or s yrewr es mac i e, thefco nbination of a body portion having these a i as etthe b e i h reof, f u wa r n r s idr b, etch t e d l haying reenforeing riloscast thereomand a cover pivoted on the rear Wall of the body p rt on-v v i i In a casing for a typewriting machine, the wmbi ie fw t body P rtion henna a base, a rile cast at the bo-tto'in thereof four st eet r m mid f t. ach of, a d W l em ev-ett rcmsr ibs n t thereon, one of sai walls havlng an opening, a coverplate to close said opening, lugs cast on the open wall at the edges of the opening, co-operativc lugs cast on the diver-plate, means associated with said lugs to fasten 'said cover-plate to said casing, and a cover pivoted on said body portion. 5. In a casing for a typewriting machine, the combination of a cast body portion comprising four walls, one of said walls having in opening therein to permit the machine to be introduced into said; casing, abutntients cast on the Wall opposite to the wall having the opening therein, said abutinents being adapted/to engage the "frame of the type- Writing machine 'to assist in locating said? machine relative. to the casing, a cover-plate to close the open wall, means to secure said cover-plate in its closed posit-ion on said casing, and abutment-s cast on said coverplate to engage the frame of the machine, 6; A sound-deadening casing for it typewriting machine comprising a keyboard, having upper overhanging side portions to accommodate the travel of the typewritercarriage, said casing comprising a body portion and a lid, said bodyportion having side and rear Walls and; a front Wall having an opening through which the keyboard projects, all forming part of a, single die casting, the side walls haying laterallyen tendn ig portions to term the floors or hottomsof-sa1d overhanglng s de portions oi the casing, said body-portion having pro jections or means to be engaged by feet of the typewriter, to locate the machine in the casing with the keyboard projecting through said opening, said projections integral with said Cristi-n 7, A sound-deadening casing for a typewriting machine comprising a keyboard, having upper overhanging side portions to accommodate the travel of the typewriter carriage, saideasing comprising a lid, a body-portion having side and rear Walls :nid'a' front well through which the keyboard projects, all consisting of a single diecasting, the side walls having laterally-entending portions to form thefloors or hottoms ofsaid overhanging side portions of the casing; and a lnein'ber' to close the front wall around the keyboard, said casing hav ing onthe rear wall oi the body-portion and on said closing member opposed projections or means for engagement with, the four feet of the typewriter to locate the mawriting machine, having upper overhang ing side portions to accon'iniodate the travel of the typewritentzztrriage, said casing coinprisinga body'portion and a lid, the lid hinged'fto the body-portion and comprising front, rear and side walls, and a top halv- 111g its forward portion inclined downwardly towards the front, all formed of a single die-casting, said lid having a sightopening near the front thereof and being cast with a groove at the forward edge of said opening, said sight-opening being closed by a transparent. plate having its lower edge inserted in said groove and being otherwise secured to said lid, the hingemembers on said body-portion and lid being so shaped as to form a close joint between the rear walls of the body-portion and lid, and to provide a substantially smooth outer surface over the hinges when the lid is closed. 9. A sound-deadening casing for a typewriting machine, said casing being composed of moldable material and con'iprising a molded body-portion with an open front, a molded lid to lit on said bod vportion, and a molded cover-plate for said open front. 10. A sound-deadening casing for a typewriting machine, having upper overhanging side portions to accommodate the travel of the typewriter-carriage, said casing comprising a body-portion and a lid, said body portion. having front, side and rear walls formed of a single die ca sting, the rear wall extending above said side walls and being provided with reinforcing ribs running to the top thereof and with perforated projections forming hinge-meml'iers, said lid having front, rear and side walls and a top, the rear wall of the lid being provided with perforated hinge-members to co-operate with the hinge-members of the body-portion and the side walls of said lid extending below the lower edge of the rear wall, so as to engage the side walls of the body-portion throughout their length when the cover is closed. 11. The combination of a typewrit ng machine having a carria e and a sound-mufiling casing enclosing the machine and fitted thereto, said casing comprising a body having hinged in rear thereto a cover extended to accommodate the travel of the carriage and provided in its top with a window, said body having a rear wall and side walls fitting to the bottom of said cover, said cover having a top, a rear wall and sides forming thin sheets of light structural metal stiifened by corners formed by die-casting the cover to form one rigid-piece, the side walls constitut ng integral stiffening flanges for the lengthened top and rear walls. 12. The combination of a typewriting machine having a carriage and a sound-muffling casing enclosing the machine and fitted thereto, said casing comprising a body having hinged n rear thereto a cover extended to accommodate the travel of the carriage and provided in its top with a window, said body having a rear wall and side walls fitting to the bottom of said cover, said cover having a top, a rear wall and sides forming thin sheets of light structural metal stiffened by corners formed by die-casting the cover to form one rigid piece, the side walls constituting integral stiffening flanges for the ting to the bottom of said cover, said cover having a top, a rear wall and sides forming th'n sheets of light structu al metal stiffened by corners formed by die-casting the cover to form one rigid. piece, the side walls constituting integral. stiffening flanges for the lengthened top and rear walls, said body structure formed of a single die-casting of light structural metal and open at its front for the projection of the typewriter keyboard thcrethrough, a vertical. plate connecting the side walls of said body and co-operating therewith to produce a rigid structure, and means detachably fastening said plate to the side walls. l 14:. The combination of a typewriting inachine having a carriage and a sound-muffling casing enclosing the machine and fitted thereto, said casing comprising a body having hinged in rear thereto a cover extended to accommodate the travel of the carriage and provided in its top with a w ndow, said body having a rear wall and side walls fit ting to the bottom of said cover, said cover having a top, a rear wall and sides forming thin sheets of light structural metal stiffened by corners formed by die-casting the cover to form one rigid piece, the side walls constituting integral stiffening Flanges for the lengthened top and rear walls. and the side walls of said body placed relatively close to the sides of the typewriting machine and having lateral overhangs or outwardly-extending portions underlying the ends of said extended cover and co-operating with said cover to form chambers to accommodatethe travel of the typewriter carriage. 15. The combination of a typewriting machine having a carriage and a sound-muftling casing enclosing the machine and fitted thereto, said casing comprising a body having hinged in rear thereto a cover extended to accommodate the travel of the carriage and provided in its top with a window, said body having a rear wall and side walls fitting to the bottom of said cover, said cover having a top, a rear wall and sides forming thin sheets of light structural metal stiffened by corners formed by die-casting the cover to form one rigid piece, the side walls constituting integral stiffening flanges for the Ian lengthened top and rear Walls, and the side Walls of said body placed relatively close to the sides of the typewriting machine, and having lateral overhangs or outwardly-extending portions underlying the ends of said extended cover and co-o-perating with said cover to form chambers to accommodate the travel of the typewriter carriage, said overhangs or portions having upstanding integral flanges at their outer ends. J FRANK ALLARD. Witnesses: EDITH B. LIBBY, JENNIE P. THORNE.

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