US1251867A - Automatic carriage-return for type-writers, line-spacers, and reverse tabulators. - Google Patents

Description

T. F CRAWL EY. E

V AUTOMATIC CARRIAGE REIURN FOR TYPE'WRIITERS, LINE SPACEBS,AND REVERSE TABULATORS.

APPLICATION men 061216. 1915 r 1,251,867. Patented Jan. 1,1918. 2 snnma-anm I.

r T. F. CRAWLEY.

AUTOMATIC CARRIAGE RETURN FOR TYFEWR HERS, LINE SPACERS, AND REVERSE TABULATORS.

' APPLICATION nu'iu ocT. I6. 1915.

1,251,867. v Patented Jan. 1,1918.

2 BHEET8BHEET 2.

provide a device of the character t1oned in which, when the carnage of a UNITED STATES PATENT THOMAS F. CRAWLEY, OI NEWTON, MISSISSIPPI.

'IABULATORS.

Specification of Letters Patent.

Patented Jan. 1, 1918.

Application filed October 16, 1915. Serial No. 56,278.

if?) cllwhom it may concern.

Be it known that I, THOMAS a citizen of the United IJ'ewton, in the county of F. CRAWLEY, States, residing at Newton and State 'of 'Mississip'pi, have invented certain new and useful Improvements in Automatic Carriag'e-Returns for Type-Vriters, Line-Spacers, and Reverse-Tabulators, of which the following is a specification.

My invention relates to typewriters and more particularly to an improved automatic carriage return.

The primary object of my invention is to above mentypewriter has reachedthe end of its travel or the completion of a line, it will automatically return to its original position, ready to start another line.

Another object of my invention is to, provide a carriage returnin mechanism which automatically spaces tl e paper carrying ri'iller simultaneously with the return of the carriagel Afulther object of the invention is to pro- ,vid "'mproved circuit closing means-for use D connection with a device of the character ic'iflmy. invention.

Astill further object of my invention is to provide a new and improved clutch mem her for association with the preferred embodiment of my invention.

With the above and other objects in view {my invention resides preferably in the con v ruction', combination; and arrangement of ts as hereinafter set forth in the specifiones illustrated in the accompanying "drawings,- in which- Figure li a front elevational view of a pwritershowing my improvements assotherewith,

. ,4 ig. a rear elevational view of the .sam ,J:-.- r Figd vis a diagrammatic v1 arrange ent,

' Figzis a longitudinal sectional view of an. improved clutch-which I use in connecew of a circuit tion'j' with my improved typewriter carriage" return; and .1

. ectric motor shdwing the manner of parts of the invention herelnafter xtviiflpin reference characters designate to the line spacing lever armature 14 is is a detail end elevational view of similar parts throughout the various views of the drawin s.

In the drawings, I have illustrated a type wr ter having theusual base frame 1 on which the carriage 2 is laterally movable. My nvention is so arranged as to permit its appl1cat1on to .any of the resent typewriters. The invention embodles broadly an electric motor, circuit closin carriage, means for maintainln the circuits 111 closed position throughout t e return of the carriage and means for automatically opening the circuits at the end of the return of said carriage. An improved auto matically acting one-way clutch is provided for a purpose which will hereinafter appear, the detail structure of this clutch being hereinafter described.

More specifically, an electric motor 3, thereof being elongated as shown to advantage in-Fig. 4 to carry a winding sheave or drum or the like having my improved clutch associated therewith. The clutch is designated as a whole in Fig. 1 by the reference numeral 5. The electric motor 3 is connected to the carriage through the medium of a belt, twine'or the like 6, said belt having one extremity wound about the clutch 5 and the other extremity connected 7 of the typewriter. The belt 6 is trained over the guide pulley 8 mounted on a bracket 9 carried by a base frame 1 of the typewriter.

In order to energize the motor to cause a. return of the carriage automatically I have provided a source of electrical energy such as a battery '10, conductors 11 and 12 leading 'therefrom,-one of said conductors having the el-ectro-magnet 13 interposed therein and the other conductor being electrically connected with an armature 14 adapted tothe invention embodies be influenced by the electro-magnet when the latter is energized. ()ne extremity of the rigidly mounted on an insulator 15,'the free extremity of said armature being bent upwardly and provided with a ball contact 16. v The motor 3 is embraced in the branch circuit including the conductors 17 and 18, the conductor 18 having a circuit closer 19 interposed therein, said air-- cuit closer being carried by the armature 14. A sec nd circuit closer 20 is carried by the armature 14 and is adapted to contact wlth the armature shaft 4- means on the 'manually operable circuit the terminal 21 of a branch'conductor 22 connected to the conductor 23 thence leading to the resilient arm 24 carried by the Carriage of the typewriter. A second branch conductor 25 is connected to the main conductor 11 and terminates in the stationary terminal 26 dis osed in the path of movement of the resllient arm 24: so as to be engaged thereby to close the circuit to the electro-magnet 13. It will be seen from an inspection of Fig. 3 that the circuit closer 19 is adapted to engage the circuit terminal 27. A manually operable circuit closer 28 is shunted across the circuit closer 19 and the circuit closer 27 for a purpose which will hereinafter appear, said terminal 28 being termed hereinafter the spacing key. A closer 29 is shunted across the conductors 23 and 25 to permit the manual closing ofthe circuit of the electro-magnetin case of emergency. From the above, it will be seen that a main circuit is provided, havin a pair of branch circuits extending there rom, one of said branch circuits embracing the electric motor 3 and the other of said branch circuits serving to maintain the motor circuit closed for a predetermined interval.

' As shown to advantage in Fig. 2, the resilient arm 24: is adjust-ably carried by the carriage 2 so as to adjust the length of travel of the carriage.

In order to automatically open the circuits when the carriage has been returned, I provide a circuit opener comprising a lug or but-ton 30 slidably adjustable on a; rod 31 s'upported'on the carriage 2.

In order to facilitate 'a release of the carriage for use after the same has been returned to itsstarting position, I have provided an improved clutch comprising a winding drum 32 elongated as at 33 and provided with a concentrically arranged relatively large opening 34. The drum 32 is threaded for engagement with the extension 35 of the armature shaft 4, of the' electric motor 3, or said drum maybe mounted separate from themotor extension.

and carried thereby. The extension 35 is automatically engageable and disen 'a 'eable with and-from said drum, the threa ed. portion being designated 36. A flanged collar 37 may be earned. by the extension 35 and freely rotatable thereon, an adju'gtable collaifl 38 carried on the extension I limitthe -lon itudinal movement of said drum.- Suitabeanti-friction bearin means 39 ma be interposedbetween the co lars 238* and 37; Acap 40' is mounted for" free rotation on the extension 85, said cap being maintained in the desired position thereon b means of anadjustable collar 41, Suitable anti-friction bearing means 42' may be interposed between the cap 40 and the collar 41. .A suitable coil spring element 431s mtcrserving to.

i6 pivotally mounted on the motor frame having engagement with said ratchet wheel to permit rotation in but one direction. A suitable guard 47 is arranged on the motor frame and is secured thereto as at 48 the upper end of the same being adapted to be engaged over the pulley 8 and the drum 32 in order to prevent dislodgement of the belt 6. I

In operation, the typewriter is used in theusual manner, the carriage traveling across the machine step by step until the spring terminal 2+ en ages the stationary terminal 26. This wil close the main cir cuit in which the electro-magnet 13 is interposed energizing said magnet and causing the armature 1a to be actuated. This operation automatically closes two circuits, viz., the motor circuit and the main circuit the latter being permanently closed by the a v ove mentioned operation. The current flows atthis time through a conductor 12 to the? electro'magnet l3 thence through the conductor 22 passing fromthe terminal 21 to the armature It at the point-'20 and thence through the conductor ll back to the source of energy 10. The motor circuit includes the conductor circuit 17 connected to the conductor 12, the conductor 18 from the terminal 27 through to the circuit closer 19' 30 carried by the carriage 2 serves to auto-- .matically open the circuits hereinbefore' referred to when the carriage is brought to the position at which said circuit opener is caused to'engage the knob l'ficarried. by the armature .115 the circuits at-the points 19 and 20.. will automaticallygopen both the motor-"cirs, v

suit and the ma1n"- control circuit and the.

14 causing the latterto be raised brea. f

ill)

carriage is ready for further movement;

through its path of travel. Should it be de sired to move the carriage independently of.

the automatic control, his merely necessaryto close the circuit closer 29, for an instant,

which will cause the carriage to return. In

order to operate the spacing leverindependently of the carriage,-- Iii-have provided the spacing key 28 hereinbefore referred to. By intermittently closing said spacing key,

short quick pull .ma be directed on the belt 6 causing the lever to be actuated.

' ing, owl to'the movement of the carriage, the said um will be caused totravel longitudinally along the extension 35 against the tension of the spring 43. It is to be under-' Several circuits hereinbefore descr1 -;When the carriage reaches the end of its travel and is released, it is necessary that some-means be rovided. to permit the free rotationof the rum 32. The threads 36 to which said drum is'engaged, are formed on an extension in a direction opposite to thedirection of rotation of said drum when winding. Thus, when the drum is unwindstood that. the spring 43serves to normally tend. ,to force said drum into engagement with 'the threads 36 so thatwhen the sh ft of e ed the drum wil'l be caused to wind the cord thereon. Of course it will be understood that .the number of. threads may be varied as desired .depen on the relation of t e size of drum an the carriage. y I

From theabove description taken in conrotated by the automatic closin nection with the accompanying drawings, it is thought that a clear and comprehensive understanding of the constructiomoperation. and advantages of my invention may be readily 'gathered and while I have shown anddescribed the same as embodying-a spestructure, I reserve the right to. make qtor mounted onsaid typewriter and having connection with said carriage, said motor,

changes therein which do not depart from the11s'pirit and scope of aimed.

i What I claim is: p

Y 1. A' -carriage return for typewriters; ineluding, in combination with ,a typewriter having the usual carriageyan electric 1110- the invention as being embraced in a branch circuit communicating with -a main circuit, means on "the typewriter carriage for automatically closing saidmain circuit, and means embraced in said main circuit for maintaining the same closed and for closing said motor circuit.

2. A carriage return for typewritersuineluding, in combination with a typewriter w fhaving the usual carriage, an electrlc motor mounted on said typewriter and having connection with said carriage, a motor embraced in a branch circuit communicating with a mai'n circuit, means on the typewriter carriage for automaticall circuit, means embrace in said mam c1rcu1t for maintaining thesame closed and for the length of travel bf main circuit having an electro-magnet emclosing said main closing said motor circuit,'and means carried by the carriage for automatically opening said circuit closer" when the carnage is re- .turned to the starting position. 1

3. A carriageretu'rn for typewriters, includmg, 1n combination with a typewriter having the usual carriage thereon, a main circuit, said main circuit embracing an electromagnet and circuit closer, a branch circult embracmg'an electrlc motor and having electric connection with said main circuit,

a circuit closer for said branch circuit adapted for actuation by said electro-magnet, whereby to close said main circuit and said branch circuit when said main circuit is initially closed.

4. A carriagereturn for typewriters, in

cluding, in combination with a typewriter having the usual carriage thereon, an electric motor on {said typewriter having connectlon with sald carriage, a motor circuit embracing said motor and a'circuit closer, a

braced therein, and a circuit closer carried by the carriage, said electro-magnet being" adapted to actuate said circuit closer in the motor circuit to maintain said motor circuit closed until the carriage has been returned to the starting position.

5. A'carriage-return for typewriters, including an electric motor, a circuit therefor,

a main circuit electrically 'connected with said motor circuit, an electro-magnet interposed in said motor circuit, a circuit closer adapted tobe actuated by said electro-magnet, adjustable means'carried by the carriage toclose said main circuit, said circuit closer serving to maintain said main circuit and said motor circuit closed throughout the return travel of said carriage.

6. A carriage return for typewriters including an electric motor, the armature shaft of said motor being extended and threaded, retaining collars carried on the shaft, 9.

windingdrum adapted at times to freely move on said shaft, means for causing said drum to automatically engage and rotate with said shaft, and a flexible element adapted to be wound about said drum and connected to the typewriter carriage, as and for the purpose set forth.

In testimony. whereof I afiix my signature in presence of two witnesses. I THOMAS F. CRAWLEY. I

Witnesses: H. C. WILsON, 1

- W. W. WVATTs.

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