US1248420A

US1248420A - Type-writing machine.

Info

Publication number: US1248420A
Application number: US8041916A
Authority: US
Inventors: Henry L Pitman
Original assignee: UNDERWOOD COMPUTING MACHINE CO
Current assignee: UNDERWOOD COMPUTING MACHINE CO
Priority date: 1916-02-25
Filing date: 1916-02-25
Publication date: 1917-11-27
Anticipated expiration: 1934-11-27

Description

H. L PH'IAN.

TYPE WRITING MACHINE.

nrrucmmi min rams. 1915.

j Patenm-Nov. 27, 1917.

INVENTOR" 433:.

WITNESSEQS v A I.

UNITED STA'QEES PATENT orricn.

HENRY L. PITMAN,'OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO UNDERWOOD COM- PUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

chines, and more particularly to improved means for adjusting the keys of the machine to the proper heights, and is of partieular advantage where the parts have to be made comparatively rigid and heavy, as

16 in a combined adding and typewriting machine.

In machines of this charmxter it has been found that when assembling the machine or when making repairs, such as the inter- 20 changing of parts of the printing mechanism, that the keys of the machine will not always rest In proper position, some stand: lng above others. This may be due to the fact that the arts are not properly fitted, or to some otier irregularities such as the t iype cushion being of various thicknesses.

his condition, however, is objectionable,

as the machine would not look well and would not be easy to operate speedll y; and

80 it mayalso cause faulty operation of parts of the machine with which the keys cooperate, for instance, the mechanism which is' to lock the keys at the end of: the line (by means of a ball which rocks under hooks B5 on the key levers) for, if the hooks are not in proper positiom'thcy may prevent the bail from rocking under the hooks of the other keys.

A feature of this invention is the prolO vision of-novel and inexpensive means for adjusting the parts, so that the keys have a uniform heiglii'lt without weakeningany of the parts, and also without regard to the pliability of the metal. This may be 46 done by mounting one of the connections between the types and the keys, on an adjustable arm, thelatter being mounted on the key lever.

Another feature is the convenient arrangemcnt of the parts to be readily accessible and adjusted in a short time. This may be done by so positioning the ad uSting members that they will be readlly ae- TYPE-WRITING MACHINE.

Specification of Letters Patent.

cessible from the 0 ts' Patented Nov. 27', 1917.

Application filed February 25, 1916. Serial No. 80,419.

do of the machine without dismantling parts. The adj usting elements may consist. of screws having slotted heads faring outwardly, in which case no special tools need be employed for making :nljustment. I

Other features and advantages will here inafter appear.

. In the accompanying drawings.

Figure l is a side elevation showing the relative position of the parts of an llnderwood typewriter, including my invention as applied thereto.

Fig. 2 is a perspective View of the type action of said nuu'hine, with my invention applied thereto the parts being innornial position, with the type bar resting on the rides in the slot 14 of the type bar 1 cushion of said machine.

Fig. 3 is a planview ol' the adjustable member of my invention. with a part broken away to show the shouldered rivet, theother parts being shown in dot-aml-dash lines.

Fig. 4-

a side elevation of the same.

In the form oi the invention herein dis closed, it is indicated as being applied to an Underwood typewriter, comprising keys 6, mounted on key levers which are pivotllly mountedrn rod 7, each key lever being prmided with a stud 8, engaging a forked arm 9, ol an interponent it), fulcrnmcd on a rod l]. and having an upwardly extending arm 12, l'n'ovided with a stud 13, engaging a ram slot l t, in a type ha]- 15. When a key is depressed the stud 8 rides in the forked arnrS), thereby cam- Ining the intcrponent l0 .i'orwardly so that the stud 13 in the arm 12 of the intcrponent 5, and swings the tyrnrlmr u 'iwnrdly and rear wardly about a fulcrum rod 16, against-the platen 17. After the key has been released, a spring 18, resting on a bar 1!) on the iran'ni of the machine, and bearing on the key lever, returns the parts to normal positions, the type bar to striking a cushion 20.

'VVlie1i assembling the machine, or when making repairs, such as placing new type bars in the machine, it has been found that the rows of keys do not always lie level or even. This condition arises because of irregularity in the parts which form the connections between the key levers and the type bars.

For instance, the cam-slot -14 permittlie usual locking bail 21 to swing under the hooks'Ql of the keys.

Heretofore the manufacturer or repairer would either remove the parts and fit them properly, consuming much time, or maul the keys near the rod 7 with a special tool, thereby raising or lowering the key levers atthe keyboard to proper position. This weakens the key levers, renderingthem liable to breakage.

Toobviate the above difliculties'in a convenient and inexpensive manner, without weakenin any of the parts, I mount the stud 8 o the key lever upon an arm This arm may be p'ivotally secured to the key lever by a rivet 23, having a shoulder 24 which acts as a spacer between the key lever and/the arm 22. The arm 22 may be bent out .from the key lever at 25. to clear the forked arm 9, so that the stud 8 may extend through said forked arm between the keyle ver and the arm 22. Therefore the device may be placed on the machine Without changing the usual position of the parts relatively to the interponent l0.

, The arm 22 is. variable as to height, being provided with a portion 26 bent around under the key lever at a considerable distance therefrom. Two

screws

27 and 28 are placed at opposite sides of the rivet 23 which forms the pivot for the arm 22 and bear-upwardly against the key lever to-hold the arm 22 stationary-With the key lever.

To adjust the arm to various heights, and thereby permit the spring 18 to restore the key accordingly, it is simply necessary to loosen and tighten the

screws

27 and 28. For instance, if it is desired to raise the key at the keyboard, the screw 28 is withdrawn and the screw 27 tightened, thereby rocking the arm 22 torelatively lower the stud 8, and thereby allow the key to rise.

If it isdesired to lower the normal position.

of a key, the screw 27 is withdraw-'11 and the screw 28 tightened, thereby raising the stud '8 a-nd'forcing the key down.

The

screws

27 and 28, being upo'n opposite SldS ofthe' ivot of: the arm 22, tlghten against one anot1er,'thereby-locking the de" i It will be seen that in placing the-"screws In combined typewriting and computing machines in "whichthe keysactuallyido the computing, such'as shown in my co-p'ending application. No. 24,390, filed April 28, 1915, in which the. 'key levers are Iprovidd with cams 30 rocking a bail 31'-t'or. turning. the number into the computim wheels, the amount of rotation given to the computing wheels depends upon the throw of the cams on the key levers; therefore the thi'div of the key must. be very exact. In order to get this exact throw, the key levers for the numeral keys must be very rigid, and are therefore madeof heavy material. Ithas been found that these key lovers are ,too so heavy to maul and therefore this invention is of particular advantage when used on thenumeral, key levers of a combined typewritingand computing machine. As -in the said application, the universal bar .32 operated by a nib 33 of the type bar, controls the escapement f the typewriter, and 5 also operates part of the computing mocha msm. I

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

Having thus described my inventioin' I claim:

1. In a typewriting machine, thecom bia5 nation with a type-bar and a key, of means for transmitting motion from the key to the F ty pebar, said 11n0tion transmitting means including two entrained elements having adjustable ,connection therehctween. connection comprising a pivoted arma two opposing screws for adjustably fixit'ig,,, the relative angular position of the arm i"t h respect to the element by which it is cajried. I

2. In a typewriting machine, the coml: nation with a type-bar and a key. of means for transmitting motion from the key to'th'e typc-bar.' said motion -ltransmitting means including two entrained elements having an 11. adjustable connection therebetween, sa'ik connect-ion comprising a pivo'trd rocker and two screws for adjustably lixing the ieliiftive angular position of the rocker, said sci-en's being oppositely located with respect 11: to the center of motion ot' said voeker sii that each screw tends to oppose the effort of the. other. i

i-l. In a typewritingmachine. the eonihlnation with a type-bar. a key lever, and an 12tinterponent for transmitting motion from said key lever to said type-barfof an ad justabh connection betweelr said key lever and said inter mnent "comprising an a'r-ni pivotally' 'niovable'with respect to said ke'y 12b lever and having a motion-transmitting 'engagement with said .iideefpn'eht,and two screws for :uljustabl'y 1 finingt h e rel'a tive an gul position 01 said 'ai'in".\t'ith'- respect'tu "111 one o1" said pivotaily (me oi said pivotally related members and having a part l'o be forced. against the other on rotation of said screw in one direction, the action of each. screw, when so rotated, lici'nilin g lo ()].l] )0\4". the action of the other.

t. In a typewril'ing machine, the combination-with? a type-bar, a key lever, and an interponentfor transmitting motion from said hey lever to said type-bar, of. an adjustable connerdfion between said key lever and said interponent comprising a rocker pivotally movable with respect to said key lever and llavil'lga mptiontransmitting engag'enicni with said ii'iterponent, and two screws lor adjustal'aly fixing the relative angular posilion of'sai" rocker with respect to said he); ll.1 .'(%l,'(:a(.fl screw being threaded related members and having a part to he forced against the other on rotation of said screw in one direction, said screws being oppositely located with respect to the relative center of motion between said rocker and said key lever, so that each screw tends to oppose the eflect of the other when so rotated.

5. In a typewritirig mz'ichinc, the combination with a typedmr, a key lever, and an interponimt for transmitting motion from said hey lever to said type-bar, of an adjustable connccl'im'i' between said key lever and said ii'itcrponont comprising a rocker pivotallymovable with respect to said key lever and having a motiontransniitting engagement with said interponent, and two screws for adj ustab] y fixing the relative an gular position of said rocker with respect to said key lever, each screw being threaded in the rocker and having a part to be forced against the key lever, said screws being op positely l0 atcd with respect to the relative center of motion between said rocker and said hey lever, so that each screw tends to oppose the ellect of the other when so rotated.

6. In a typewriting machine, the combination with a type-bar and a key, of means for transmitting motion from the key to the type-bar, said motion-transmitting means including two lements having an adjustable connection therebetween, said connection comprising an. arm pivotally movable with respectto one of said elements and having a movable engagement with the other, and two screws, accessible for operation from the outside of the machine, for ad ustably fixing the relative angular position of the arm with respect to said pivotally related element, each screw being threaded ,in one of said pivotally associated members and having a part to be forced against theother on rotation of said screw in one direction,

the action of each screw when so rotated tending to oppose the action of the other,

7. In a typewriting macl1inc,.the combination with a-type-har and a key, of means for I. transmitting motion from the key to the lypebar, said motion-trunsmitting means mchldmg two elements having an zul lustable tween said member and rocker so that each screw tends to o ppose the cl'lcct of the other when so rotated.

8. Ina typcwriting machine, the combi nation with a type-bar and a key, of means for transmitting motion from the key to the type-bar, said motiontransmitting means including two elements having an adjustable connection therebetwcen, said connection comprising a ri'ich'erpivotally movable with respect to one of said elements and having a movable engagement with the other, and two screws, accessible for opera; tion from the outside of the machine, for adjustably fixing the relative angular position of the rocker with respect to said-pivotally related element, each screw being threaded in the rocker and having a part to be forced against said pivotally related element, said screw being oppositely located with respect to the relative center of motion between said last-mentioned element and rocker so that each screw tends to oppose the effect of the other when so rotated.

9. In a typewriting machine, the combination with a typc-bar, a kcylever, and an interponent for transmitting motion from said key lever to said typebar, of an adjustable connection between said key leVcr and said interponcnt comprising an arm pivotally movable with respect to said key lever and having a motion-transmitting engagement with said interponent', and means,

accessible for operation from the outside of the machine, for adjustably determining and fixing the relative arm with respect to said key lever.

10. In a typewriting machine, the combination with a type-bar, a key lever, and an interp'onent for transmittin motion from angular position of said said hey lever to said typeer, of an 'adadjnstably fixing the relative angular position of said arm with respect to said key lever, each screw being threaded in one of said pivotallyrelated numbers and having a r part to be forced against the other on rota.-

tion of said screw in one direction, the action or eachscrcw, when so rotated, tending to oppose the action of the other.

11. lna' typewriting machine, the combination .ivith a type-bar, a key lever, and an interponent for transniiltingmotion from said key lever to said type-bar, of an adjustable connection between said key-lever and said intrponent comprising a rocker pivotal] y movable with lflfil'lftt to said ke lever and having'a motiontransmitting engage nent with said interponent, and two screws providing nieans, ace. 'ihle for op eration from the outside oi the machine, for adjnstably fixing the relsdive angular position ol' said rocker with resg. e .:t

to said key lever, each screw being threaded in one of said pivotally relatt-al members and hav ing a part to be i'orced against the other on rotation of said. screw in one direction, said screws being oppositely located with respect to the relative center of motion between said rocker and said key lever, so that each screw tends to oppose the efi'ect of the other when so rotated.

and said interponent comprising a rocker pivotally movable with respect to said key lever and having a motioil-transmitting engagement with said interponent, and two screws providing means, accessible for op eration from the ()llilSith-Bflf the machine, for adjustably fixing the relative angular position of said rocker with respect to said key lever, each screw being threaded in the rocker and having a part to be forced against the key lever, said screws being opno ely located with respect to the relative center of motion between said rocker and said key lever, so that each screw tends to oppose the efiect of the other when so rotated.

HENRY L, PITMAN.