US1252218A - Type-writing machine. - Google Patents

Description

1. H. BARR & H. A. CARHART.

TYPEWRITING MACHINE.

J.. H. BARR L H. A. cAnHAR-T;

TYPE WRITING MACHINE. APPucATloN 'FILED wv. al, 191e.

Patented Jan. 1, `1918.

2 SHEETS-SHEET 2.

` 1 Md'wwv UNITED sTATEs PATENT oEEIcE.

JOHN H. BARR, OF NEW YORK, AND HERBERT A. CARHART, OF SYRACUSE, NEW YORK,

ASSIGNORS T0 REMINGTON TYZPEWRITER COMPANY, 0F ILION, NEW YORK, A COR- PORATION 0F NEW YORK.

' TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented J an. 1,1918.

To all whom t may concern.'

- Be it known that we, JOHN H. .Baan and HEneEaT A. Casarini", citizens of the United States, and residents, respectively, ot the borough of Manhattan, city of New in the county of New York and State of New "York, and Syracuse, in the county of Onondaga and State of New York, have invented certain new and useful Improvements in r.lype-riting Machines, of which the following is a specification.

Our invention relates to typewriting machinos, and it has for its principal object to provide an improved carriage brake, more especially designed for use in connection with the tahulator to regulate or lessen the velocity with which said caiiriage runs when released from its escapcment. y,

To the above and other ends our invention consists in certain features of construen tion and combinaticnsand arrangements of parts. all of which will be fully set forth herein and particularly pointed out in the claims.

In the accompanying drawings,

Fivure 1 is a ro'nt to rear vertical sectional view, on areduced scale, of a type? writing machine having our invention em bodied therein.

Fig. 2 is a view similar to part of Fig. 1 but on a larger scale and showing our brake mechanism in normal position by full lines and by broken lines in operated position.

Fig. 3 is a rear elevation, partly in section, on the line a: ai of Fig. 2.

Fi g. f1 is a perspective view of our brake mechanism, said view made in two sections and condensed. f

ln all of the figures, parts have been omit ted or broken away as has been found convenient. f-

Ve have illustrated our invention in its application to a Smith Premier No. 10 typei writer, the main frame of which machine comprises side plates 1, a top plate 2, a keyboard plate 3, and a rear cross bar or plate V1, the last connecting the side plates 1 at the base of the machine. The platen 5 is mounted in a carriage 6 which runs on a stationary rail 7 through the instrumentalityof balls 8', said rail being mounted on stand ards 10 rising from the top plate 2. -The carriage is fed by a spring 11 mounted lin a spring drum 12 and operating a large gear York,

wheel 13 which meshes with a feed rack 14 secured to the carriage.

The carriage 'feed mechanism, including the spring drum and the escapement and their connections, is' all mounted in ahousing comprising a front vertical plate 15 and a rear vertical plate 16, said housing being secured to the underside ofthe top plate 2. The spring drum 12 and the gear 13 are mounted on a shaft 17 in said housing and on said shaft there is also loosely mounted a companion gear 18 which meshes with the feed rack 14 and also with a pinion 20, which pinion is an integral part of a sleeve 21 mounted with freedom to turn on a shaft 22, which at its rear end is journaled on a pivot screw 23 passing through the plate 16 and.

sleeve 21 are normally connected with the shaft 22 by means of av ratchet-toothed clutch, of which the pinion 20 constitutes one member. The other member of said clutch consists of a sleeve 31 slidably mounted on said shaft 22 and having a tongue 32 (Fig. 2) engaging a groove in a. flanged collar 33 rigid with the shaft. A. compression spring34 normally holds the clutch members in engagement, in which event the carmachinc, which parts, however, are not 4shown 'in the drawing. The pinion 2O and riage isgeared to the cscapement wheel; but

the carriage can be released from the escapement by sliding the clutchmember 31 to` ward the rear, as indicated by broken lines4 in Fig. 2. To this end said clutch member is formed with a peripheral-groove, in which lies the upper end of a release lever 35 which is pivoted at 36 to a lug of the back frame bar 4.

One form of Smith Premier tabulator. is

illustrated in the drawing and it comprises a column stop bar 37 suspended from the rear part ofthe carriage 6 by means of arms 38. This-bar is formed on its front and rear faces with vertical grooves into which 'can it undertthe control of the cam on therear be inserted aplurality of column stops 40, each havii'ig one or more stop lugs 41. projecting dowun-'ard therefrom, said stop lugs being, out of alinen'ient with one another for the purpose of' column selection. Coperating with said stop lugs is a key operated stop Y'l2 extending into the hase of the machine where it is suitably connected with a transverse rock shat't "i8, which is pivoted in lugs tl oli the trame bar 4. The details of the connection between 4said stop and shaft are not shown herein as this mechanism is in common use and is well known. Said connections are'of such c.lu1ra .'ter that when the shaft 4?) is rocked by the tahulator keys the stop 42 is pr(' jeeted upwardly into the path of one ot' the lugs :41.

The shaft 43 has an arm 45 projecting toward the 'front of the machine near the right-hand side ot said machine, and a pin 4G projecting laterally from the 'forward end of said arm constitutes a universal bar overlying a group of four tabulator key levers 4i which are all piroted at 4S to the right-hand side plate 1. ',I'he levers 47 are normally held up at then-forward ends by a series ot springs 5() secured to a bracket 51 which is fastened at to the side platel 1. Said levers are of different lengths and each ol' them has pivoted to its forward end the stem ot a tabulator key 54.

' In `order to provideI for the selection of any desired' one ot the column stops 40, the upper end of the stop 42 passes through a guide 55 which is pivoted at 56 to a bracket 57"depending from the top plate 2, the con-- struction being such that said guide canhe rocked toward the front or toward the back of the machine to bring the stop 42 into line with any desired lug 41. Said guide is in the nature of a lever of the first order hav ing a depending arm with a roller G0 thereon, said roller overlying the rear ends of the levers 47, which levers are formed ai said rear ends with cams of dil'erent inclina` tions so vthat when any one ot them is operated it moves the roller in one direction or the other to determine the position of the stop 42 in accordance with the particular' key 54`that` has been operated. The roller 60 and guide 55'are' held normally in a middle position by means of a cam guide Gl constituting part ot the rear end oiv a lever 62 lying beside the levers 47 and controlled by one ofthe springs 50. Said lever (32 has-an ear G53 projecting upward theretromat thc rear of the pivot 48, and a pin'64, projecting from said ear.y lies over all of the levers 47 so that when any ot the keys 54- is operated thev rearend of the universal 'lever G2 will he moved upward, thus releasing the roller 60 froni, the control of the cam 61 and placing endg-of the operated lever 47..A

The tabulator mechanism can be of any desired construction as far as our invention concerned, and the one herein partially shown and briefly described will be found more fully set forth in the patent to Brown No. 937,414, dated Oct. 19, 1909. The Whole construction is such that when any one of the keys 54 is depressed the guide 55 will he rocked toward the front or toward the hack to bring the stop 42' into line with one of thc lugs 4l and at the same Atime the shaft 3 ivill he rocked, with the result that said stop 42 will be moved upward into the path of the selected lug 41.

The carriage is released by the rocking of the sh aft 42. This can he effected in various ways but as here shown said shaft has a depending arln (55 having a pin 66 projecting into a notch 67 in the lower end of the release lever 35, with the result that when said shaft 43 is rocked the lower end of the lever $35 is moved toward the front of the machine and the upper end of said lever and the clutch member 531 are moved toward the rear ot the machine7 all as indicated in broken lines in Fig. 2.

Our brake mechanism comprises a-drum 70 on the sleeve 21, and a brake shoe which comprises a piece ot leather or other suitable material 71, mounted on the upper end of a sheet metal bar or link 72. Said link may have a block 73 of suitable material secured to its upper end in order to provide a Wider face for the brake shoe. The bar 72 is suitahly bent toward the rear and at its lower end it has an .ear 74 bent oli' therefrom to accommodate `a pivot pin 75 projecting from an arm 7 6 which is loosely mounted on the universal rock shaft 43 and projects therefrom toward the front of the machine. Said bar or link 72 is guided at itsuppcr end in any suitable way, the means here shown comprising two slotted ears 77 bent off from a -sheet metal plate 78 secured by screws 80 to the frameplate 15, said ears embracing by their slots the right-hand edge of the bar 72 and the left-hand end of an arm 81 of the shaft 43 by the side of the arm 76, and

' said arm 82 has an car 83 hent off therefrom beneath the arm 76 and an adjust-ing screw 84 is screwed upward through said ear with its upper end in contact with said arm 7G. lSaid screw 84 may be provided with a lock uut The arm 82 is curved upward at its 'forward end where it is formed With an earx 8G to which if, connected one end of a` contractile spring 87, the other end of which is connected with an arm88 rigidly secured, as by a 4pin 90, to the shaft 43. The arm 88 hasl an ear 91 bent oli' therefrom and normally lying in contact with the upper edge of the lever arm 76.-

Then the parts are i-n normal position Astraining means thus described.

rshown in Figs. 1 and 4, and by full lines in ear 91, which limits the motion of arm 76.

under the force of spring S7. Said spring 87 and lug 91 thus normally hold Vthe parts' in fixed relation. Thus the spring constantly tends to apply the brake, but 1s nor mally prevented from sodoing by the relVhen a tabulator key is operated, the arm 88 being rigid on the shaft. 43, is moved upward and toward the back oi the machine, partaking lof the whole motion ot' the shaft 43. The

spring 87 pulls the arm Si). after it and'said arm 82 moves the arm 7G, thus moving the brake shoe 71 up against the drum 70. Said brake shoe cornes into contact with said drum before the oscillation of the shaft'43 is completed, and said shoe and the arms 76 and 82 are thereby arrested so that these parts do not move as far as the arm 88. The continued motion of said arm SSlifts the ear 91 ofil of the arm 7G, and transfers the force of the spring 87 to the brake shoe, pressing said brake shoe against the drum 70. It will be perceived that the degree of pressure thus brought about between the brake shoe and the drum can be regulated to a nicety by adjusting the screw 84. The normal position of the brake shoe is determined by the con-y tact of the lever 76 with the ear 91 but the adjustment will be to move the lever a'rm 82 4up or down independently of the lever arms 88 and 7 6. It the lever 82 be adjusted downward the tension on the spring will be increased and if it be adjusted upward the tension on the spring will be diminished. When a tal'xulatr key is operated the arms 88, 82 and 76 move together until the brake shoe and the parts positively connected therewith are arrested by said shoe coming against the drum 70, after which the lug 91 is lifted ofi' of the lever 7 6 and the whole `tension on the spring 87, whatever that may' be, comes on the brake shoe. be made much Lr little by suitable adjustment of the spring, which adjustment, in the present instance, is made by adjusting the screw 84, as above explained. It will be noted that the lower end of the screw points toward the bottom of the machine Where it is readily accessible for the use of a screw driver with-ht removing any of the parts. It will also be noted that, whereas one end of the spring 87 is connected with the brake, the 'other end is connected, not toA the stationary famework, but tothearm 88 Said tension can.

stop 91 which normally limits the action of said spring, is also a art of said tabulator mechanism. As a resu t of this construction,

-said spring 87 does not resist the return of the, tabulatormechanism to normal position when a tabulator key is released after having been operated.

It will'be perceived that our improved brake mechanism is constructed almost entirely of sheet metal, that it has few parts,

which are inexpensive to manufacture and which are effective for their purpose, and

that the action of the brake can be very readil regulated after themachine has been assem led. Thel drum is preferably made of a diameter ion 20 so that the brake acts on apart of the machine that has a faster surface speed than the carriage itself. In other words, it has a little leverage on the, carriage that a less 'degree of pressure is required than would otherwise be necessary. The leather brake shoe 71 is also referably curved about the drum 70 and this increases the friction for a given amount of pressure.. This is desirable because, whereas the brake pressure comes directly from the spring 87, the tension of said spring has to be overcome by the fin er ofthe o erator acting on the key 54, an it is desira le not to put too heavy a resistance on said key. At the same time the degree of pressure of the brake can be no greater than.

the tension of the spring, no matter how great the pressure on the key. If said key is operated to a suflicient extent to release the carriage it will lift the ear 91 oil' of the lever' 76 and cause the spring 87 to-aet on the brake shoe.

Various changes can be made in the details of our construction and arrangement without departing from our invention.

What We claim as new and desire to secure by Letters Patent, is:- j

1. In a typewriting machine, the combination with a brake `member and a key, of an intermediate train `of devices including a bodily movable spring having a tension nor mally vto apply said brake member, and means for restraining the action of said spring until said key shall have beenv actuated, said spring constituting a connecting link between two other parts of said key-V operated train.

l 2. In a tyfewriting machine, the combinad tion witha rake memberand a finger key, of an intermediate train of devices including a bodily movable spring normally adaptled to apply said brake at the initial operation of said key and after such' application adapted also to yield during any further movement of said key and without materially affecting the braking pressure, said yspring constituting a connecting link be tween two other parts of said key-operated train.

Ureater than that ofv the pinals 3. In a typewriting machine,the combination of a rotary member connectediviththe carriage feeding mechanism, a brake shoe adapted for application to said rotary member-,a key lever, a train of devices between said key lever and said brake shoe comprising a bodily movable spring normally under tension and by the same tending always to apply said brake shoe, and a stopimemberffor` preventing such action until ,the said key shall have been actuated, said spring' and stop 'member being interposed between two `parts p of said key-operated train. f l

4. In a typeufritin-g machine, the combination of a rotary member connected with the carriage feeding mechanism, a brake shoe adapted thereto, an arm connected to lift said brake shoe, a coiled spring connected at one end to said arm, a second arm to which the other end of said spring is connected, said second arm being provided with means for preventing movement of the first arm by said spring until the said key shall have been actuated.

5. In a typcwriting machine, the combination with a carriage, tabulator mechanism including a rock-shaft, escapement mechanism, and carriage releasing means, of an arm fixed on said rock shaft, a second arm loose on said rock shaft, a friction brake4 controlled by said second arm, and a spring between said fixed arm and said loose arm.

(i. In a typcwriting machine,the combination with a carriage and tabulator mechanism including a rock shaftg'of escapement mechanism, carriage releasing means operated by said rock shaft, an arm fixed on said rock shaft, a second arm loose on `said rock shaft, a friction brake controlled by said second arm, a spring between said ixed arm and said loose arm, and means adjustable to regulate the tension of saidV spring.

7. In a typewriting machine, the combination with a` carriage and tabulator mechanism including a rock shaft, of escapement mechanism7 carriage releasing means operated by said rock shaft, a friction brake, an arm loose on said rock shaft and connected to said brake, a second arm looseon said rock shaft, means for adjusting the relation between the two said loose arms, an arm fast on said rock shaft, and a spring connecting .jaid fast arm with the second recited loose arm.

8. In a typeivriting machine, the combination with a carriage and tabulator mechanism including a rock shaft, of escapement mechanism, carriage releasing means operated by said rock shaft, a friction brake, an arm loose on 'said rockshaft and connected to said brake, a second arm loose on said rock shaft, means for adjusting the relation between the tivo said loose arms, an arm fast on said rock shaft, a spring'connecting said fast arm with the second recited' loose arm,

nism including a series of tabulator keysv and a universal member operated by said keys, of escapement mechanism, carriage releasing means controlled by said tabulating mechanism, a brake mechanism including a part moving with the carriage When said ,p

carriage is released, a'friction brake, a device operated by said universal member of the ta'bulator mechanism, a spring .connection between said device' and said brake, and means for regulating the tension of said spring connection `vithout varying the normal position of said brake.-

10. In a 'typewriting machine, the combination with a carriage, tabulator mechanism including a plurality of tabulator keys and a universal member .operated by said keys, escapement mechanism, and carriage releas- 'ing means controlled by said universal member, of carriage brake mechanism 4including a brake shoe, a device operated by said universal member of the tabulator, a second device connected with said brake shoe and occupying a fixed normal position relative to the first mentioned device, and a pressure-transmitting spring connected with one of said devices and having an adjustable connection with the other of said devices, whereby the tensionv of said spring can be regulated.

ll. In a typewriting machine, the combination with a carriage, tabulator mechanism,

escapement mechanism, and a carriage release device, of carriage brake mechanism including a brakeshoe, an arm adapted to be oscillated by an operation of the tabulator mechanism, a second arm connected with the first mentioned arm by a spring, a third arm connected With.` said brake shoe, an adjustable connectlon between said second and third arms, and means for limiting the motion of said third arm with relation to said first arm under the impulse of said spring.

12. In carriage brake mechanism for typewriting machines, the combination of a brake shoe, a hand operated rock shaft 43, a loose arm 76 connected with said brake shoe, aloose arm 82having adjustable connection with said ar1n76, an arm 88 fast on said rock shaft and connected by a spring with said arm 82, and a device 91A to limit the motion of the arm 76 ywith lrelation to the arm 88.

13. In a typewriting machine, the combi- 'nation with a carriage, a shaft 22, escapement mechanism including a Wheel connect- Y ed with said shaft, a drum 70 sleeved on said shaft 22 and gearedto said carriage, a`

applied to said drum, a link 72 for operating said brake shoe, tabulator mechanism ineluding a rock shaft 43 means whereby said rock shaft operates sai clutch, an arm loose' on said rock shaft and controlling said link 72, an armfast `on said rock shaft, a spring 87 for cornmunicating's ring "pressure om said fast arm to said oose arm when the tabulator :is operated, Vand means for regulatingy the tension of said spring.`

14.' ,In a typewriting machine,`the combination witha carriage, escapement mech nism, tabulator mechanism and a carriage release device; of a drum geared to said-- carriage, a brake shoe partially encircling l said drun, and a bodily movable adjustable springI acting at one end on said brake shoe mesme and connected at its other end t0 said tabulator mechanism.

Signed at the borough of Manhattan, city. 20 of ,New York, in the count of New York and State of New York t 10th day of November, A, D. 1916.

JOHN H. BARR. Witnesses:

CHARLES E. SMITH, ll.y M. WELLS. v Signed at Syracuse, in the county of Onondaga, and State of New York, this 6th day vof November, A. D. 1916..

HERBERT A.' CARHART. Witnesses:

MAarR. S'rnvnNs, IsAAo S. BERRY.

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