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Publication numberUS1764620 A
Publication typeGrant
Publication dateJun 17, 1930
Filing dateAug 11, 1928
Priority dateAug 11, 1928
Publication numberUS 1764620 A, US 1764620A, US-A-1764620, US1764620 A, US1764620A
InventorsEdgar Goetz A
Original AssigneeUnderwood Elliott Fisher Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Typewriting machine
US 1764620 A
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Description  (OCR text may contain errors)

June 17, 1930. A. E. GO ETZ TYPEWRITING MACHINE Filed Aug. 11, 1928 ATTORNEY.

illuminating the interior of sound-deaden-s Patented June 17, 1930 A EDGAR eonaz, or ran nocnaway, new YnK,-Assienoit To;nnnnawoon nnuomr I FISHER COMPANY, or nnw yonnn; Y., a CQRPGRATION OF DELAWARE 'mYP ntvniTine nAoHrNE Application filed Augustin, 192s, sw rm; 299,087.

The present'invention relates to means for ing cases for typeWriting machines. I

' It ls'usual to provide a glass Window lna sound-deadening case for a typewritl'ng machine, through W'lllCll typing may be viewed as it is performed. Occasionally light is re fle'cted in an objectionable way from this i IVlilllOllt 11 interfering With glass Window into the eyes of the operator. To prevent this reflection, a blind or shade ofthe kind disclosed in the patent to (i VV. Campbell1,526,962isfl sometimes mounted over the Window. In some cases, this shade makes the interior of the sounddeadening caseobjectionably dark, especially when the lightingin a roomisdeficient. 1 1 It is a feature of the present invention to mount electric lamps inside a'sound-dead ening case and provide means for reflecting the light from the lamps so as to satisfactor,

ily illuminate theprinting field of the platen the typ'evvriting machine. v Another feature resides in the employ.- ment of the shade for carryingga reflecting mirror which co-operates ith lamps for illuminating the 7 interior of the case. I

In carryingiout my invention, an electric lamp is mounted in the sound-deadening case ateach side of the typewriting machine forwardly from the carriage A mirrorjs mounted infront of each lamp and is effective for reflecting light from it 7 rearWardly to the printing field. of the adjacent end portion of the platen, when said portion extends beyond'th-e side of the machine- A mirror is also mounted {on thennderside of the shade andisefiiective to reflect light from 7 both lamps to the portion of the platen disposed between the sides of thetypewrlting machine as Well as each end portionof the platen. This arrangement provides desirable glareless illumination. V V v It is another'feature of the sinventionto provide each lamp and its associated reflectmg mirror as a compact unit having means for attaching it to the sound-deadening case. A'further feature of the invention resldes in making certain of the mirrors effective for diffusing light to A further reduce glare.

the operation of Other features and advantages will here 'lnafterappear.

In the accompanying drawings, I 1 Figure 1 isla perspective view of an ,Un derwood typewriting machine enclosed in a sound-deadening case having my invention applied thereto.- A portion of'the case is broken away; for showing an element of my invention more a clearly.

V 'Fig'ure'Z's a'perspective view of an'electric lampunitused inpracticing myinvention. c

'F1gure'3'1s ELCFOSS-SGCtlOIlfilView, front to rear, through the structure shown in Figure 1, and illustrates ,hoW light rays from lamps mounted insideof the sound deaden- Ting casefmay be w d'ito illuminate the platena a In an Underwood typewriting machine generally designated as .10, types ll strike against a platen 12. To diminish the noise resulting from impacts ofthe types" against. the platen, t is commonto place-the machine 10-111 a sound-deadening case generally designated as 14, which m'ayfinclude a lower body portion l 5randa cover 16' mounted thereon by hinges 17. The body portion may have 'lateral'extensions to permit travel of a platenecarriage 18 ineach direction The sound-deaden1ng i case may be of a WellkIlOWlI' construction and t 1s not deemed neeessary to describe it in detailherein, for an understanding ofth'e present invention,

Ausual sound-absorbing lining19of a material like felt may be appliedto the inside surface. of the case at all points except as 1 space'lever passes over it closely "adjacent a minimum that will permit the free lateral travel therein of the lever 20, a usual felt strip is fastened by an angular plate 26 r to the inside of the cover 16 so as to extend along the opening at the upper side thereof.

A strip of felt 27 is employed 'to c'o operate with the strip 25 and may be held against the inside of the body portion adjacent the opening 21 by a plate 28 which may be longi "tudinally bent so as to have a substantially inverted Y cross-section such as is shown in Figure 3. It will be noted that the strip 27 is disposed between an upturned leg 29 of the Y-plateand is braced by an arm 30 of the latter, which engages-against an upper portion of the felt lining 19 disposed against the inside of the body portion 15.

To permit typing on a work-sheet 31 to beviewed bythe operator as the typing is performed, a VieW opening 32 is provided in the cover 16 and is enclosed by a pane of glass '33 which be fastened to the cover in' a well-known way. I

In some cases, typewriters equipped with a sound-deadening case have been used where light rays were reflected from the panes of glass 33 into the eyes ofjthe operator, which was objectionable. To prevent this reflection, a. blind or shade 34; of the same con struction as disclosed in the patent to G. N.

. Gampbell.1,526,962 may be supported on two arms 35 which. are pivotally mounted on the cover 16. The blind may be made of a piece of sheet-metal 36 having a concavo-convex cross-section (see Figure r V v V p Inusing a typewriter enclosed in a sounddeadening case havingfa blind ofthe'kind mentioned above, it sometimeshappens that the lighting arrangement of a room is such that the interior of the sound-deadening case is not sufliciently illuminated for good work.

-..For providing satisfactory illumination in such cases, or in any sound-deadeningcase wheremorelllummation is needed, it is a feature of my nvention to mount two elec- 1L t 1c lamps, generally designated as 40, inside i the sound-deadening case, ,one at each side of the typewriter in. the extensions of the body portion 15. Since the depth of the space at each side ofthetypewriting machine for receiving such lamps is shallow, I

prefer to employ lamps having cylindrical bulbs 41 ofsmall .diameter'relative to their length. [Such lamps can be bought in the open market. 'Each bulb is secured in a usual socket 452 which may be fastened by soldering, or in any other suitable way, to an end wall 43 of a lamp housing, generally designated as 44. The housing may have a floor 45, a rear wall 46, whichare integrally joined tot-he end wall 43, and a front wall 417 which extends above the rear wall and which integrally joins the floor. An integral bracing lug 48 on the end wall may be bent to lie against the forward side of the front wall to which it may be fastened as by riveting, I

The housings 44 may each have means for detachably hanging it on the body portion 15, which means may consist of two hangerinembers 50 whose lowerends 51 extend under the floor 15 to be soldered thereto adjacent each end. The upper end of each hanger member may be bent down to form a hook portion 52 which may engage snugly over the upper end of the inverted leg 29 of the Y-plate 28 and pass between the leg and the felt strip 27; The lower end of the hangers 50 may rest against the felt lining 19.

To guard against glare, the rear wall 16 bulb in a substantially vertical plane, and

then curves to. the rear extending partly over the lamp bulb 41. The top edge of the curved portion of the mirror will be disposed a short distance below the path of the curved portion of the line-space lever .20.

The mirrors 55 and 56 may be fastened to the housing-4 1 by integral lugs of the same which extendpast the edges of the mirrors and are bent over against their faces. Also the upper end of the front wall may be bent over the upper edge of the mirror 56.

For a purpose to presently appear, the

work face of each of the mirrors 55 and 56 will preferably be formed with. a series of low ridges or beads 57 which are disposed transversely to the length of the bulb 41. .1

The height of a ridge 57 will preferably be small relativeto its width, and the top of.

the ridge will'preferably be very slightly rounded. This construction will provide a series of shallow grooves 58 between two adjoining ridges. The rounded ridges serve todiifuse the light, and to reflect it over a wider area than would occur if the mirrors were plain.

As illustrated in Figure 3, certain rays of light generated in the lamp bulb 41 will strike against the curved portion of the mirror 56 and will be reflected to the printing field of the platen 12 when an end portion of the latter extends beyond the side of a main frame 59 of the typewriting machine.

Since each lamp bulb 41 and its curved reflecting mirror 56 are positioned at one side of the main frame 59. and slightly below the top of'the latterylight reflected by' then-iirrors 55 and 56 may not satisfactorily illuminate the portion of the platendisposed between the side of the main frame 59. To illuminate the last-mentioned portionof the platen by the above-mentioned lamps, there is provided a mirror-like reflecting plate 60 which may be fastened, as by screws,- to'the under side of the blind-3 l,"the


plate having a transverse concavo-conve'n curvature substantially the same'as the blind, and thereby may be mounted compactly thereagainst. Since the concave side of themirror plate is turned down, it will be apparent, from inspection of the diagrammaticrepresentations of the light rays from Figures 1 and 3, that lightrays fronr the lamps 40 will be-refiected to every portionof the platen and the printing field The mirror plate 60'will preferably be of thin sheet-metal having its lower face high- 1y polished' The blind 34 may be held by friction in any Work vposition in which it may beset to have the mirror plate 60ccoperate-with the lamps140. It can be readily seen that certain light rays from the lamps will strike against the mirror on thefloor'of the housing and be reflected to the mirror plate an'd thence to the platen. For bringing electric current to the lamps 40 an ordinary insulatedelectric li ht cord 61 may'enter the body 15 through'a hole 62 adjacent the bottom or the bodyand have twobranches, one leading to each socket 42 to be connectedftherewith in the usual way. 7

Each socket is disposed on the opposite side of the, associated lamp from the type- Writing'machine, which arrangement is con venient' for bringing the electric conductingwires tothe sockets without interfering with the functioning of the typewriting machine. This arrangement also disposes the free unattached end of thebulbs' 41 in position to effect maximum typewritingmac'hine.

It will be noted (see Figure 2) that the lamp 40, the housing 44, the mirrors 55 and 56, and the hanger members 50 are assembled as a unit which can be readily attached to a sound-deadening case without change in the latter except for making a illumination of the hole for thecord 61 to enter the case.

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, 1 claim:

1. The combination with a typewriting machine and a sound-deadening case having a body portion, a cover for the same, a

glass-covered View opening in said cover and a glare-preventing blind for said opening, of an electric lamp mounted 1n said case at each side of "said machine and in front of the carriage ofsaid machineya mirror at the front of each lamp for reflecting light therefrom to the adjacent end portion of the platen of said machine extending out beyond the side edge ofthesame, and a mirror fas tened to the underside of said blind,'which is eil ective to reflect lightfrom said lamps to'the central portion of said platen between th sides of said machine.

; p 2. The combination with a sound-deeded ing case for a typewriting machine, of a lamp positioned for illuminating the interior of said case, means for preventing light from said lamp passing directly to the prints ing field of the. platen ofsaid machine, and

means for reflecting the light of said lamp to said printing field,-wl1ereby glare from said'lamp is prevented. 1 l

8. The combination with a sound-deadening case for a typewriting machine, of two electric lamps, means for mounting said lamps insaid case, one lamp disposed at each side of. said machine out ofthe path of-the carriage of said machine, and means for reflectingthe light from sa1dlamps to illuminate'all parts of the printing field of said machine.

4. The structuredescribed in claim 4, characterized by said case having a stationary body'portion anda dlsplaceable cover hinged thereto, and further characterized-by the lamps being mounted on said body-pow tion out of en a ement with said dis olace a b able cover;

5; The combination with v a typewriter sound-deadening case having a body portion. with lateral extensions to permit travelof the carriage of the typewriter, and a cover for said body portion having a glass-covered View opening, of two electriclamps in said case disposed against the front Wall of said body portion, one at each side of the main frame of the typewriter in said extensions,

reflecting devices in said case effective for reflecting the light of said lamps to end portions of the platen 'of-said typewriter when said end portions extend beyondsaid main of "saidshade forreflecting' the light from i said lamps to said platen." V p 7. The. combination. with a sound-deadening case fora typewriting machine, of a, lamp effective for illuminating the interior 1 of said case,means for preventing light from said .lamp passing directly to the printin field of said machine, and mirrors positioned for reflectingfthe light from said lamp to having its upper portion curved partlyover the printing field, said mirrors having means including rounded ridge portions for diii using the light from saidlamp, whereby to reduce glare.

8. An illuminating unit for a sounddeadening case for a typewriting machine including a' housing, instruinentalities for detachably fastening said housing to said case on the interior of-the latter, an electric lamp socket fastened to said housing at the interior thereof, an electric lamp engaging in said socket, and a mirror at one side of said lamp effective for reflecting light from said lamp toward the opposite side and over said lamp, said housing being arranged to stop the light passing directly from said lamp in the direction of the reflected light.

9. The structure described in claim 8, characterized by the mirror at the side of the lamp extending above said lamp, and

said lamp. 7

10. The comblnatlon with a casing for a typewriting machine having a platen and a carriage, said casing having a stationary and a displaceable cover hinged thereto, of two electric lamps mounted in said'body-portion oi the casing,

one lamp disposed at each sideand in front. 01" the carriage of the mac'hme,:the cover oi said casing having a glass window for observing the work during typing, and means for reflecting the light from said lamps to illuminate the printing field of said machine, including means effective to receive light-rays from said lamps through said Window and reflect them through the window again to the platen of the machine.

11 The combination with a typewriter casing having a body-portion with lateral extensions to permit the travel of artypewriter-carriage and a cover for said bodyportion having a glass WlIlQlQW thQlelIl, oi

'two electric lamps in saidcasing disposed one at each side against the front wall of sa d body-portion in said extensions, devices in said casing effective for reflecting vthe light of said lamps to a platen oifa typewriter when the end portions thereoi extend beyond the main frame, a glare-pre-i.

venting adj u stably-mounted shade associated with the window, and a reflecting mirror positioned at the undersideof the shade hava curvature eflective to reflect lightto the 1: platen.

12. An illuminatingunit for a typewriting-machine casing, including a housing, means for detachably attaching'said housing to the interior of the casing, an electric lamp mounted in said housing, a mirror located at one side of said lamp, effective for reflecting light therefrom toward the opposite sidethereof, and over .said lamp, means included in said housing to prevent the light ;from passing directly from said lamp in the direction of the reflected light, said mirror; extending above thelamp and having an upper curved portion partly overhanging;

the lamp, and corrugations on said mirror for dlffusing the light of the lamp asit is reflected to the interior of the casing.

' 13. The combination with a;casing for a typewriting machine including a c.0ver-,,of illuminating means within said casing, for lightingthe interior of the same, and means including a reflector on said cover effective to reflect light from the illuminatingmeans;

to the printing field of said machine.

14. The combination'with a casing for a typewriting machine including a cover, of a lamp within said casing-forilluminating the interior of the same, and means, includ ing a reflector on said cover and a light barrier betweenthe lamp and the machine effective to permit reflected light, and only reflected light, to reach theprinting, field of said machine.

init reflected light and onlyreflected light to reach the. printing field of said machine.

16. The combinationwith a-c'asing for a.

typewriting machine including a stationary member to receive the machine and atcover for the same, of 'illuminatingmeans,within;

said stationary member-of the casing, and

means on said cover effective to reflectthelightirom theilluminating means to, the printing field of said machine.

17. The combinationwith a casing for a typewriting machine including a stationary member to receive the machineand a cover for the same, ofilluminatmg meanswithin said stationary member of the, casing, a ight barrier between said means and the machine, and means on said cover to reflect li ht from the illuminating, meanstoflthe machine.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6923584 *Oct 25, 2002Aug 2, 2005Sony CorporationImage forming apparatus
US7465110Apr 13, 2005Dec 16, 2008Sony CorporationImage forming apparatus
US7524121Apr 13, 2005Apr 28, 2009Sony CorporationImage forming apparatus
U.S. Classification362/89, 362/235
International ClassificationB41J29/19, B41J29/18
Cooperative ClassificationB41J29/19
European ClassificationB41J29/19