US1576941A - Typewriting machine - Google Patents

Description

- Mud. 1s 192s. 1,576,941.

E. E. BARNEY TYPEWRITING momma Filed May 3. 1922 A 3 Sheets-Sheet 3 Patented Mar. 16, 1926.'

UNITED STAT-Eis PATENT" oFFicE.

EDWIN EQBAR'NEY, c-F'NEW ROCHELLE; NEW YoItK', AssIfGNon To RMINGTON TYPE- WRITER COMPANY, 0F ILIoN, NEW YORK, A CoaPoRA'rIoN'or NEW YORK.

TYPEWRITING MACHINE.'

Application led May" 3,

To all l2li/201m. t may concern:

Be it known that 1, EDWIN E. BARNEY, citizen of the United States, and resident ot New Rochelle, in the count-y of l,"Vcstchester and State of 1New York, have invented certain new and useful Improvements in Typewriting Machines, of which the Vfollowing is a speciiication.

My present invention relates to back spacingmechanism for typewriting machines, and its principal object is to provide new and improved mechanism oi the charactery specified.

To the above and other endswhich will hereinafter appear my iii'vention consists in the teaturesot construction, combinations of devices and arrangements ot' partshereina'fter described and particularly pointeii out in the claims.

1n carrying out my invention in the presentv instance ln have applied it to a typewriting machine ot the character disclosed in the application ot' John 1-1. Barr and Edwin ll. Barney, Sr. No. l103 ,i'80, filed August 1G, 1920, and in the application ot A. 1V. Smith, Sr. No. 476,788,iiled June 11, 1921, but it is to be understood that various features ot the `invention may be adapt ed to other styles of machines.

In `the accompanying drawings Figure 1 is a fragmentary Jront-to-rcnr vertical sectional view or" said typerriting machine, only so much of 'the machine being shown as is nec ssary to a complete understanding of the invention.

Figure 2 is a transverse vertical sectional view taken on planes indicated by the s tion line 1 1 in Fig, 1 and looking rearward in the direction ot the arrows at said line.

Figure 3 is a *fragmentary horiz/.entail sectional view taken on planes indicated by the section line 2-2 in Fig. 2 and looking downward in the direction of the arrows at said line.

Figure L1 is a fragmentary view showing parts of the back spacing mechanism from the view-point of Fig. 2, but illustrating said parts in their operated positions.

Figure 5 is a fragmentary front eleva.- tion showing the back lspacing latch and the member for actuating,r it as associated in a SEZ-character, single shift, typewriting ma? chine. c V

As appears from the drawings, the main 'ing end bars 1922'. serial No. 558,185.

trame of the machine comprises side plates 1 connected at the Jfront and rear by cross plates 2 and A carriage arranged above the main frame comprises an inclined trans versc bar 4s provided with forwardiy entend- The bar 4 is grooved to provide seats for anti-friction rollers G, the upper set whereof co-operates with a grooved seat formed in a stationary guide oar 7 mounted on an angular bed plate 8 which is ysuitably fixed to the side plates 1. rllhe forward portion of the bed plate yterminates in an extension 9 tor-med with a grooved seat for the lower set ot rollers (i. Journaled on the `traveling carriage -1, 5, is a roller platen, 10 with whose iront 'tace co-opera-te type bars 11, the set o1 type bars being arranged in an arc below the pieten, their 'free ends normally rest-ing on pad 12 mounted on a curved support 13. The ype bars are pivoted on a wire 11 mounted on. a vertical type bar support or segment 15, each type bar being provided torwarr of its pivot with a contact face 16 for co-4 operation with the cscapement devices. Below its pivot each type bar is formed with cam slot 17 which is engaged by a hea-1 ed pin 18 projecting laterally from the lower arm ot a bell crank 19. The set or" bell cranks 19 are arranged in guide slots forme-d in the support 13 and have a coinmon pivot` wire 21 which is mounted on said support. Each bell crank 19 is connected at its shorter arm by a link with an angular lever .23 pivoted on a wire 24 in a sub-trame 25 detachably secured to the main trame,` the set ot levers 23 being received in parallel guide slots 25' iorined in printing movements, the type bars wili actuate the escapement devices causing them to co-operate to permit the leftward step-. by-step movement of the carriage under the `pull of a carriage motor comprising a spring driven drum 30 mounted on the frame of leo the machine and connected-to the carriage by a band or strap 3l secured at one end to a projection 32 on the drum 30 and provided at its opposite end with a stirrup 33 which hooks over a pin 34 on the carriage bar 4. The escapeinent devices comprise a curved universal bar 35 which is actuated by the contact faces 16 of the type bars and is comprised in a universal bar frame which is mounted on the segment l5 and includes a rearwardly extending arm 36 that is adapted to actuate a dog carrier or rockerv 37 mounted to swing on stationary pivots 3S and 39 that project from hanger arms 40 depending from the bed plate S. Mounted on the rocker 37 are escapement dogs 4l and 42 which co-operate with a toothed escapement wheel 43 fixed to a shaft 44 adapted to rotate in bearings on the bed plate 8. A spring pressed pawl 45 is pivoted to the front face of the escapement wheel at 45"L and the tooth of said pawl is maintained by its spring 45h constantly ein gaged with a toothed member or feed pinion 46'loosely mounted on the shaft 44, said pinion inter-meshing with a feed rack 47 fixed to the lower side of the carriage by screws 4S. The construction is such that leftward movements of the carriage will be transmitted through the feed rack 47 and pinion 4G to the pawl 45 and thence to the escapement wheel 43, while during return movements of the carriage the pawl 45 will bob idly in and out of the teeth of the feed pinion 46 as it turns leaving the escapement wheel unaffected. It will be observed that the feed rack 47 is fixed rigidly to the carriage by the screws 48 and that the connection between the feed rack and the feed pinion 4G is a. constant or permanent one and never is broken, the disconnection of the escapement mechanism from the carriage duringI return movements of the latter taking piace between the pinion 46 and the escapeinent wheel 43 through the pawl ii'i'ylnovel back spacing mechanism comprises a slidable member or latch carrying back spacing pawls cooperative with the pinion 4G and actuated by a train of connections terminating` in a key in the keyboard. The back-spacing latch or pawl carrier, designated as a whole by the numeral 4S, is preferably made of sheet metal in the form of a bar or plate and is provided at its left ond with two devices, teeth or pawls 5() and 5l which are formed by lips or edges bent forward at rightanglcs from the face of the body portion. The pawl 50 is'inclined upward at an angle of about 45 degrees to the horizontal and is adapted to act as an actuating pawl, while the pawl 5l which is horizontally disposed functions as an arresting` and locking device. At its right-hand end the latch or slide 49 is formed with a recess or seat indicated at 52 thereby providing two contact faces 53 and 54. The latch is provided with two slots indicated at 55 and 5G. The right-hand slot 56 is horizontal while the left-hand slot 55 is angular, its extreme right-hand portion being horizontal and slightly above the slot 56 wnile 'the lefthand portion of said slot 55 is cut out or lowered, its upper edge being inclined downward and leftward from its junction with the horizontal portion, while its lower edge is out out until it is substantially horizontal. The slot-s receive headed shoulder screws 57 which are threaded into stationary parts, the left-hand screw 57 being screwed into the right-hand hanger arm 40 at its front side, the rightdiand screw 57 boing received in a lug 58 depending from the under side of the bed plate 8. The screws serve to support and guide the latch 49 which is loosely confined between the heads of the screws 57 and the supports 40 and' in a vertical position while being adapted to slide leftward and rightward on the shouldered portions of said screws. Furthermore, by reason of the shape of the slot the slide is capable. of limited rotary movement at its left side. Normally the latch or slide 459 is maintained in the Fig. 2 position, where the pawls are clear of or separated from the pinion 46, by means of a coiled spring 59 having one end hooked over a pin (50 on the latch, the other end being anchored to a` pin 6l projecting` forward from the upper part of the lug' 58, the pull of the spring being in an inclined direction upward from left to right. The spring tends to maintain the slide at the limit of its rightward movement which is determined by contact of the left-hand end of the slot with the shoulder of its screw 57. Also, the spring 59 tends constantly to swing upward the left end portion of the slide 49 and to lift the pawls.

rlhe actuating devices for the latch 49 comprise a bell crank 62 having an upstunding arm 63 and a horizontally disposed arm (i4. The bell crank is pivotally supported on a shoulder screw (i5 which. is threaded in-A to a boss or thickened portion Gli the inner end of an angular' bracket (37 secured by screws 68 to the right-bamiframe plate l, and projecting inward and slightly down ward therefrom. The left-hand edge of the upstanding arm 63 of the bell crank is rounded to facilitate co-operation with the latch 49 through either of the contact faces 53 and 54. The machine illustrated in Figs. l to 4 is an 84-character machine and in this instance the bell crank co-operates with the left-hand Contact face 53, the arm G3 being received in the recess 52 as shown. The horizontal arm G4 of the bell crank is provided with a hole indicated at G9 through which is hooked the upper end of a link 70,

the lower end of s aid vlink beingt pivotally connected at 7l with the rear end ot a back spacingl key lever72.- Said lever is received in one of the guide-slots 25n and is pivoted on the fulcrum wire 24 near the right-hand side of the machine, the lever extending: torward and terminating in a key ,stem 73 which is provided with akey cap or button*- 74 located in the upper bank o-keys in the keyboard and at the right-hand side. The

train of key actuated devices comprising` the key lever 72, link l and-bell crank 62 '-is maintained in normal position, and restored thereto after actuation', by spring means comprising a coiled spring hooked at one end through a hole in the bell crankarm 63 and anchored at the opposite end -to apiii 7 6 projecting upward fromthe bracket 67. The springr 75 urges -thebell crank' riglitward on its pivot, tendingto press down the link 70 and 'maintain the forward arm ot the lever72 in contactfwith `the usual stop pad v77.v

In operation, when itl is desired to back space the carriage for-any purpose the-key 7 4 is firmly depressed, swinging the lever 72 on its tulcriim and raising the link 7() which in turn actua-tes the'bell crank 62,-causing, the curved edge of the arm (S3-to press lettward against the contact face 53 of the latch- 49 and overcoming-the spring 59. As the latch is slid lettward it will be maintained i substantially horizontal-by reason of the pull oit the spring 59 which-will hold the 'bottonil edge ot the slot A55-at'v its left-hand side -upv against the shoulder of the screw 57. IConsequently the tooth or pawl 5() will enter-theopposite tooth space'in the pinion`46` and will engage with and press against the tooth face bounding` the lettside-ot-said space.

and lettward with said pinion tooth.- This movement of the pawl 50 is possiblel byvrea` son ot the shape oitthe slot 55 which permits a slight downward-fswingor rotary movement ot the 'left-hand `pmt-tion of the latch, such motion being limited Vby reasonot' the engagen'ient ot the horizontal top edge ot said slot with t-he shoulder ot the screw 57. By reason ot lthe construction,

the pushing pawl '5U-is maintained in full or operative contact with the engaged toothof the pinion 46 throughout the back spacing turning movement'.` Such-movement of the pinion 46 will continue through'a dis tance corresponding .to oneand one-half tooth-spaces, at which time tlie pinion willbe arrested and locked bythe-latch'49 due to the engagement of theipa-wl eor-device 5l with the said pinion.

This will cause the pinion 46 to turn, the said engaged tooth of the pinionbeing-thus rotated downward and towardsthevleft,the pushing -pawl 50 being carried downward Therpawl' 51 is-soy related tothe-pa-wi 50 as'to--ente-i1 thefthi-rd" short,

tooth lspace in fthe *pinion '46 above the' one" with which the pawl() is engaged; such entrance-taking place near the end of t1 back spacing movement and 'so that the pinion 46 is blocked or positively arrested when it has been turned one and one-halt spaces; The parts at-this time will be related as illustrated in Fig. 4, from which it will be observed that the top edge ot the slot'` 55 is in' contact with its shoulder screw 57 Yandthatl the slot V56v is in substantial contact at its vtop-and` bottom with its screw 57.' Con- -sequently the latch `or slide -49 is held from downward movement :at `this time, and the pawl 51, rigid with said-latch and now engaged at its upper side with atooth ot the pinion 46j will positively prevent furtherturning movement of Vsaid pinion; As a result, the "intermeshing rack y47 and the platen" carriage, will of course, be also positively ar- The construction is `suchthat amplerested; backward movement-ot' the-carriage is ettected through the impulse received from the'pinion 46 and the rack 47 to insure that lthe pawl 45 will passover one of the teeth ot' the pinionfll-fand wil-l enter the tooth. space inin'iediately to the :left vor -that with which it has been engaged prior' to the' back spacing operation.' Onv the other hand,-the

interlocking of tlielatch149 and vthe feed pinion 46 positively limits the turning movement of said pinion to the specified extentA and prevents overthrow. The pawl 45 Vis .held"against' bodilylm'ovement duri-ng the back spaciiigoperation byv reason ot the tact that its pivot l45a is xed-` on the-escapement wheel-43 which in turn is held from turning f by the' 'escapement dog41.

Then the back 1 spacing key isreleased,

the train 'of actuating devices positively i;

connected Ywitli said key, comprising' the lever-72,' link 70 and bell crank '62, will be returned to' normal 'position by rthe'spri'ngv 75, thus-restoring thev latch, 49 to the con-I trol of*its ownspring 59." From fFig. 4 it will be noted thatl in operated position the top of the inclined or cam portion of' the under side of the slot-55 is in contact with the screw'-,sothatthev initial eiiect of the spring59willbe-notbnly tof pull the latch il' under "im-pulse 'of-thespring 59 andnot block thev movement of vthe"v 'latch 49 by reason ot" engagement withfthe pinion' :46

-with which the ypawl 51' would otherwise remain; in interlockedl engagement. In

the# constructionis-"suchf` tha-tf' the-1 slight lift of the latch lunder the pull of its spring 59 is sufficient to free the pawls 5l and from the pinion and permit the resltoration of the latch to its normal position completely separated from the pinion. The turning of the pinion 4G as the latch 49 is retracted will be limited to'a' halfspace movement by reason ofl the ment of the escapement wheel with the dog 41, this half-space turning of the pinion being due to lost motion or interplay of its teeth with the pawl 45. In other words, the operative movement of the latch 49 communicates a full unit of back space turning movement to the pinion 46 and the platen carriage, together with a slight additional movement or excess, this excess of movement being taken up again when the latch 49 is retracted to normal position, the 'eX- cess movement being useful in affording disengagement of the latch from the pinion 46. As a result of the described operation the carriage will be maintained in its back spaced position, one full Iettenspace to the right of where it was located prior to the back spacing operation. The back spacing operation above outlined ma;7 be repeated as often as or whenever desired.

From the lforegoing it will be observed that the slide 49 and the pawls 50 and 5l are made of one piece and that the several parts all have a rigid relationship to one another. Y

In applying my improvements to a 92- character machine having a single shift, which machine is somewhat' wider than the S4character machine, it is not necessary to make any changes; theV slide member or latch 49 being so proportioned that the contact face 54 will be in position to receive actuating impulses from the bell crank arm G3. This will be apparent from Fig. 5 which shows the parts applied to aL 92-character machine wherein the pivot of the bell crank 62 is located somewhat further to the right than in the prior described construction.

It will be observed that I provide by my present invention a simple yet highly effective back spacing mechanism which is adapted to more than one width of machine without any variation of parts.

Various changes may be made without departing from my invention.

lVhat I claim as new and desire to secure by Letters Patent, is: I

l. In back spacing mechanism for ltypewriting machines, the combination of a toothed wheel connected to the carriage, and a one-piece key operated slide, comprising a device co-operative with said wheel to back space the carriage, and a second device to arrest said wheel at the endof said back spacing movement, the said slide and the said first and second devices :being all rigid.

2. In back spacing mechanism for typewriting machines, the combination of a toothed'wheel connected to the carriage, and a one-piece key operated slide, having a rigid tooth for pushing against said wheel to turn it in back spacing direction, and having a second tooth also rigid with said slide to arrest said wheel at the end of the back spacing movement.

3. In back spacing mechanism for typewriting machines, the combination of a toothed wheel connected with the traveling carriage of the machine, a slidably mounted bar or plate kprovided with two angularly disposed integral lips adapted to lit in bctween the teeth of said wheel, one of said lips operating to push against the wheel to turn it for back spacing' and the other of said lips operating to arrest the wheel at the end of the back spacing movement, said lips having an unvarying relationship.

4. In back spacingfmechanism for typewriting machines, the combination of a toothed wheel connected with the traveling carriage of the machine, a member or latch operative to turn said wheel for back spacing, and ke;7 operated devices for contacting with and actuating said latch, said latch bcing provided with two contact faces, one for co-operation with said devices in a relatively wide typewriting machine, and the other in a narrower typewriting machine.

5. In back spacing mechanism for typewriting vmachines, the combination of a toothed wheel connected with the traveling carriage of t-he machine, a latch operative to turn said wheel for back spacing, and key operated devices comprising a swinging arm for pushing said latch, said latch being provided with two parallel contact faces one engageable by said arm when the parts are employed in a widemachine, the same arm being adaptedto contact with the other contact face in a narrower machine.

6. In back spacing mechanism for typewriting machines, the combination of a toothed wheel connected with the travelingl carriage of the machine, a slotted bar, devices engaging in the slots in said bar for slidably supporting it, lips turned from the face of said bar to (fo-operate with said wheel, said bar being formed with a recessI to provide two separate Contact faces, and a key operated actuating device mountable to co-operate with either of said Contact faces.

7. In back spacing mechanism for typewriting machines, the combination of a toothed wheel connected to the carriage, a key operated slide, a device on said slide cooperative with said wheel to back space the carriage, said device being normally separated from said wheel, said slide having limited rotary movement after said device engages with said wheel and during the completion of the sliding movement, and

llit' means on said slide co-opei'ative With said paWl for co-opei'ating with said Wheel to 10 wheel to limit the movements of said slide. limit the operative sliding movement of said 8. In back spacing mechanism for typepawl, said pawl and said means having an Writing` machines, the combination of a unvarying relationship. toothed wheel Connected to the carriage of Signed at the borough of Manhattan, city the machine, a slidably mounted hack spaeof News7 York, in the county of New York 15 ing pawl for turning said Wheel, key opei'atand State of New York, this 1st day of ed devices for actuating said slilably May A. D. 1922. mounted paWl, and means rigid With said EDWIN E. BARNEY.

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