Патент USA US2118846код для вставки
2,118,846 - Patented May 31, 1938 UNITED STATES PATENT oFFrcE mawm'rmc MAQBINE ' _ > William F. Helmond, West Hartford, Conn.; as: signor to Underwood Elliott Fisher Company, _ New York, N. Y., a corporationlot Delaware Application December 14, 1933, Serial No. 702,301‘ 14 Claims. . (01. 191-102) the key by the ?anged annular cap, and the area This invention relates to the keys of typewrit ing machines, and, for illustration, the invention is shown embodied in a well-known type of key, provided with a socket which ?ts upon the stem of a type-operating lever. In a typewriter key, the character-bearing disk is usually capped by a glass disk. The hardness of the glass prevents it from being scratched or marred, and hence glass keys are esteemed for 10 use on trial machines, as they do not become in of the character-bearing surface is much extend ed as compared with glass keys now in connnon use; while the width of the inturned ?ange of the cap may be reduced from common practice, - 5 ' and the same rendered inconspicuous. dip his ?nger; and the ?nger is therefore not 10 liable to catch upon any adjoining key, at either jured. The character-disk and the glass disk front, back or one side or the other; which is a have ,usually been placed in a metal cup, and held in place by an annular key-cap, the latter having an inturned ?ange to hold down the glass 15 disk. .These- ?anges have been punishing the ?ngers of the operators for over ?fty years. substantial advantage, especially where it is de sired to operate the keyboard without sight of the keys. . 15 -The bed for the glass top is a gasket that) is Flangeless keys have beenintroduced, which are molded all in one piece, and fastened directly‘ upon the key-stem, but they have not tended to 2 supplant the glass-disk keys. The molded key, being made of celluloid or other in?ammable material, is apt to become ignited. Moreover, it - ' In some keyboards, the entire diameter of every key may be somewhat reduced, thus enlarging the space or well down into which the operator must _ is easily scratched or defaced, and is also liable jto soften from heat and become misshapen. ' inexpensively cut out from a sheet of pressed cork or cork-compound, havinguniform thickmess. The bottom of the metal key-cup is dished or concaved, to correspond with the convex bot tom of the glass top, which isof uniform thick ness. Thus the dished glass is solidly supported, and danger of breakage is avoided. The cork gasket is preferably pressed into concaved form The glass key tops or disks are usually cut ' beforebeing placed in the cup. The cork is some 25 2.? roughly from sheet-glass, and subjected to ?nish ingvoperations, and, besides the raised ?anges, have the further objection'oi‘ being ?at, and therefore not ?tted to the ‘?nger of the operator. so It is one of the objects of the present inven— tion‘ to produce a typewriter key which over comes these common objections. \ 7 One of the features of the invention is a key top in the form of a concaved glass disk which is 35 adapted to the ?nger and is not objectionably ?anged and is cheaply produced and readily se cured in place. a » In the upper face of the glass, the comer is ground away to form an annular depression, in 40 which fits an inturned fastening ?ange of the annular metal key—cap; said ?ange being prefer , ably ?at and ?ush’with the glass disk at its border. ' No raised portion is encountered by the operator's ?nger; there is a broad concaved 45 bearing surface of glass, having a ?at metal border of moderate width, thereby avoiding undue reduction in the diameter of the key-top exposed between the inner edges of the ?ange. ' To secure this width of the glass top, it is made 50 of the same diameter as the key-cup, and. sur mounts the same, the glass being bedded upon a what yielding, thus ‘tending to cushion the key-touch and minimize the fatigue of operating the typewriter. The cork recovers its normal height when the pressure is released; . » In one form of the invention, the character may 30 be printed upon the bottom of the glass ‘lens. Said bottom may be frosted or otherwise prepared to take the ink with which the character is print ed‘. When the character is printed upon the bot tom .of the glass, the light pressure between the 35 frosted bottom of the glass andthe ‘top of the cork gasket will prevent the glass from becoming _ accidentally rotated. key-paper is used. The same is true when a - e The key-paper may consist ‘of a thin card, 40 which, after printing the character thereon, may be pressed into concave form, to form the bed or the upper layer of the bed which supports the concaved clear key-glass. , The character may be printed directly upon the 45 cork disk, and the latter may be stained or colored to harmonize with the color of the casing in which the typewriting-machine keys are used. If a printed key-glass is'employed, the pressed cork gasket may be stained or colored. This 50 coloring of the cork will give a beautiful e?ect concaved pressed cork bed, the latter having the ‘ through either clear or frosted glass. From a large clear-glass dish, of uniform thick form of a disk which ?ts within the key-cup. ness, and of the same concavity that is desired in The border of the glass top overlies the brim of a the key-cup. The glass top is held ?rmly upon the finished key, many key-glasses may be cut 55 2 2,118,846 or formed. The glass-key top can be produced from any portion of the dish, and will be found to have the desired concaved form. The key glass is ?nished to proper size and given the 5 border-groove in its top for receiving the fasten ing ?ange. . Said ?ange 22 may be ?at and flush with the top of the key-glass at its border, so that a prac tically unbroken mainly concave surface extends the full width of the key. At Figure 5, there is employed a disk 26 beneath - the glass, having thereon a character as seen at Figure 4. This character-disk is made of card and printed, and then pressed into concave con Other features and advantages will herein after appear. ’ . . . In the accompanying drawing, a dition before being Figure 1 is a sectional front elevation of a typewriter key embodying the present improve ments in one form. ' Figure 2 is a perspective of a key-glass having a frosted bottom upon which the character is 15 printed. - due to the friction of the cork bed upon the bot tom of the cup. When the character-disk is em . 20 _‘ a _ be omitted. / Figure 5 is a sectional elevation showing the invention in a different form from Figure 1. ~ The described glass-key‘tops may be made by - blowing a glass globe or bubble 28 of the desired wall-thickness, and having a concavity of they Figure 6 is a plan of the key seen at Figure 1 or _ Figure 5. ' Figure 7 is a sectional view illustrating a step ~ dimension desired for the key-top. The diameter of the blown-glass globe may be say three inches 25 in the dividing out of ‘a key-glass from a com or a little less. ‘ plete blown-glass globe or bulb, the diamond being indicated as cutting the key-circle in the ‘blown globes ‘ key-top-outlining segments to, form many un ?nished key-tops or glasses, as seen at Figure 10. .If desired, the ke -glasses may be out directly globe into segments, preparatory to dividing them up into key-glasses. 35 Figure 10 illustrates the dividing of a segment up into many‘ key-glasses. from the-globe 28, without ?rst dividing the latter into major segments, 28*. This is illustrated at 35 Figure 7; the cutting being done byla rotary tool Figure 11 shows a cork gasket stained with the 29 having a diamond marker or cutter 30 herein. The glasses may be derived or separated from the bulb (or from a segment) by means similar to desired color, and having the key-character 40 ‘ Figure 12 represents the assembled key as being provided with the stained or imprinted cork gasket of Figure 11. Upon a key-lever stem I0 is forced down a socket-portion l2, formed in the bottom of a key— cup l3. 'The latter has circular rim or sides I4, and its bottom is concaved, as in Figures 1, 5, those employed in‘ separating ?at key-glasses 40 from sheet-glass. Then the recess or niche may be cut in the edge by the use of a hollow grinder 3121 as seen at Figure 8, using an abrasive mate r - Within the cup is placed a bed l5 of pressed 50 cork-compound, whose bottom is of spherical cur vature, ?tting the bottom of the key-cup l3. , Upon the bed I5 is placed a transparent glass , with concave top as at I1, and with convex‘ bottom as at l8, the glass being inexpensively 55 made of uniform thickness in the manner de scribed herein. 7 , _ I Upon the bottom of the glass may be printed a character IS. The bottom may be frosted as in 60 dicated at 20, prior to printing the character. In the top of the glass is ground an annular recess 2|, to receive a fastening ?ange 22, formed . ' . There is thus and 12 to correspond with the curvature of the ' key-glass. produced an efficient, durable 45 key at low cost. Variations may be resorted to within the scope of the invention and portions of the improve ments may be used without others. Having thus described my invention, I claim: 50 1. A typewriter-key having a glass top shap' 'i with a brim and a crown which over tops said brim, said glass being curved bodily to make the crown concave and to make the glass of uniform thickness through the crown, a bed which is 55 curved bodily to conformto said glass, said glass resting upon said bed, a cup having’ a concave bottom upon which said bodily curved bed rests, and an annular cap with an inturned ?ange bearingupon said brim of the glass top and being 60 upon a metal annular cap 23, which is fastened I ?ush with the crown thereof, said annular cap down by inturned ears or clasps 24, that hold the 'glass and bed i5 down upon the concaved bottom 65 i3 of the cup, and also preferably in contact with the top of the key-lever stem ID at 25. ~ The glass i6 may be the same diameter as the cup i3, and overlie the brim of the cup as seen ,- at Figures 1 and 5; thereby a?ording a maximum 70 diameter to the key-glass for visibility, and also favoring the use of a key of. somewhat less di ameter than the common key.‘ The width of the ?ange 22 is very slight, affording a relief to the eye, and the character-surface of the key may be very broad. 25' The cooled globe may be divided into major seg ments if desired.» The major segments may have any desired contour.‘ They may be dished or of circular form as seen at Figure 9. Then each segment may be cut up into smaller 30 K“ Figure 8 illustrates the manner of grinding the 30 border-recess or groove in the top of the key glass by means of an abrasive. Figure 9 shows the division of a blown-glass printed directly thereon. 15 ployed, the character is not printed upon the bot— tom of the key-glass, and the frosting may also Figure 4 is a perspective view of a concaved key-paper. l0 being accidentally rotated, this steadiness being . Figure 3 is a perspective of a compressed cork bed for the glass. placed upon the cork bed I 5. ' ' If desired, an adhesive may be employed as seen at 27, to hold the character-disk and cork bed to gether; and the glass is held down with such pressure as to prevent the character-disk from being removabiy attached to said cup ‘to hold the I parts together. 2. A typewriter-key having an extemally-con cave glass top of practically uniform thickness, 65 a bed which is curved bodily to conform to said glass top, said glass top resting upon said bed, a cup having a concave bottom upon which said bodily-curved bed rests, and an annular'cap with an inturned ?ange, the glass top being provided 70 with a brim and a crown which overtops said brim, said annular cap-?ange bearing upon said brim and being ?ush with the crown thereof, said - bed having a character inscribed thereon, the friction of the glass upon the character-bearing 75 * 2,118,846 . bed, e?ected by means of said annular cap, hold glass top, and an annular cap having an inturned ing the character-bearing bed against the bottom of the key-cup, to locate the character-bearing bed rotatively. , ‘3. A typewriter-key having a cup, a yielding bed therein, a glass key-top of equal breadth with said cup and resting upon said bed, the bed be ing proportioned to space the glass key-top from the underlying rim of the cup, and an annular 10 key-cap holding said glass key-top down upon said bed, the key-cap having an inturned glass-hold glass-holding lip, said glass top being provided with a border-recess for said lip, said lip being thereby rendered ?ush with- the glass top, said annular cap being removably attached to said cup for holding the parts together. ' 8. A typewriter-key having an externally-con cave glass top of practically uniform thickness, a base by means of which the top is supported, and an annular‘ cap attached to said base and 10 having an inturned glass-holding ?ange, said glass top being provided with a border-recess of the wall of the cup, affording a broadened ' forming a brim upon which said key-cap ?ange ing ?ange of a width about equal to the thickness exposure of the surface of- the key a?orded by 15 said glass key-top, said glass key-top having an . annular border-recess into which said ?ange is sunken to be ?ush with the key-surface, said re cess forming said glass with a brim upon which said ?ange bears and a crown which overtops said '20 brim to ‘be ?ush with said ?ange, a key-character bears, and also forming the concave top into a crown substantially ?ush with said ?ange. 9. A typewriter-key having an externally-con cave glass top of practical-1y uniform thickness, a 15 .. cup and a bed therein by means of which said marking being provided between said glass key glass top is supported, and an annular key-cap having an inturned ?ange which is sunken ?ush 20 with said glass top, and is removably attached to top and bed. said cup to keep the parts together, said glass . ‘ 4. A typewriter-key having a cup, a glass key top 01’ equal breadth with said cup, said glass key-top being curved bodily to a?ord a concave top, a yielding ‘bed in said cup upon which said top being furthermore provided witha border which shapes the glass with a brim upon which the key-cap ?ange bears, and which also shapes 25 the concave top into a crown which is ?ush with glass key-top rests, said bed being proportioned to space the glass key-top fromwthe underlying said ?ange. brim of the cup, and an annular key-cap holding cally uniform thickness for a typewriter-key or 30 said glass key-top down upon said bed, the key " 10. A curved-surface glass key-top of practi the like, one side of said key-top being provided 30 cap having an inturned glass-holding ?ange of a width about equal to the thickness of the wall of with a border-recess to form a brim, and a crown which overtops said brim, whereby said crown the cup, a?ording a broadened exposure of the and a key-top-holding ?ange bearing on said concave surface of the key a?orded by, said glass ' brim may be'?ush at the periphery of the‘ crown. 11. A typewriter key having a cup, a bed in the 35 35 key-top, said glass key-top having an annular border-recess in which said ?ange is sunken to cup, a glass top resting on said bed,v said glass be ?ush with the key-surface, said recess forming top being formed with a brim and a crown that said glass key-top with a brim upon which said overtops said brim, and an annular cap with an ?ange bears and a crown which overtops said inturned ?ange which bears upon said glass brim 40 brim to be ?ush with said ?ange, a key-character and is substantially ?ush with said crown, said marking being provided between said glass key‘ annular cap being attached to said cup to hold the top and bed. " ' 5. A typewriter-key having, in combination, an externally-concave glass top of practically uni 45 form thickness, a gasket upon which said glass top rests, a cup in which said gasket is retained, said gasket being curved bodily and the bottom of the cup being concave to correspond with the curvature of said glass top, and an annular cap 50 having an inturned v?ange tor engaging over the border of said glass top, said annular cap being‘ removably attached to said cup, to keep the parts together, the glass top being supported upon the gasket to overlie the rim of he cup ‘and said parts together. , 12. A typewriter key having a cup, a yieldable bed in the cup, a glass top. resting on said bed but overlying and spaced above the rim of the 45 cup, said glass top being formed with a brim and a crown that overtops said brim, and an annular cap with an inturned ?ange which bears upon said glass brim and is substantially ?ush with said glass crown, said annular cap being attached to said cup to hold the parts together. 13. A typewriter key having a cup, a yieldable bed in the cup, a glass top resting on said bed, said glass top being formed with a brim and a 55 ?ange being about equal in breadth to the wall ' crown that overtops said brim, means for pre of the cup, a?ording a broadened exposure of the surface of the key, said glass top being provided with a border-recess which shapes the glass top with a rim, upon which said cap-?ange bears, and with a crown which is ?ush with said cap ?ange. - 6. A typewriter-key having an externally-con venting relative. rotation between the glass top 55 and the yieldable bed, and an annular cap with an inturned ?ange which bears upon said glass brim and is substantially ?ush with said glass crown, said annular cap being attached to said ‘cup to hold the parts together. 14. A typewriter key having a cup, 2. yieldable cave glass top of practically uniform thickness, bed in the cup comprising a cork disk, a glass top and an annular metal cap provided with an in resting on said bed, ‘said glass top being formed turned ?ange, said glass top being provided with 65 a border-recess which shapes said glass, top with with a brim and a central crown which overtops said brim, the bottom of the glass top being a brim, upon which said key-cap ?ange bears, and frosted whereby relative rotation ‘between the also shapes the glass top into a crown which is glass top and the cork bed is prevented, and an annular cap with an inturned ?ange which bears upon said glass brim and is substantially ?ush ?ush with said ?ange, said key-cap having means for interlocking with a support for the glass top to hold the parts together. ' .7. A typewriter-key having an extemally-con cave glass top of practically uniform thickness, a key-cup and a bed therein for supporting said with said glass crown, said annular'cap being attached to said cup to hold the partstogether. i WILLIAM F. HELMOND.