US1512025A - Line-lock mechanism and margin stop - Google Patents

Description

4. 1,512,025 Oct' 21 192 o. A. HoKANsoN Y LINE LOCK MECHANISM AND MARGIN' STOP Filed Aug. 25 1921 3 Sheets-Sheet .l

Oct. 21. 1924.

O. A. HOKANSON LINE LOCK MECHANISM AND MARGIN STOP s sheets-sheet 2 Filed Aug. 25 192'1 Oct. 21 1924. 1,512,025

o. A. HoKANsoN LINE LOCK MECHANISM AND MARGIN STOP Filed Aug. 25 1921 I5 Sheets-Sheet 5 Patented Oct. 21, 1924.

UNITED STATES PATENT omo A. HoKANsoN, or Wo'o'nsTocK, TLLiNoIs, Assrenjon fro- Woonsroox y'TYPE- wnrmnn COMPANY, on Woonsroox, Immers, A CORPORATION von ILLINOIS,

LINE-Loox MECHANISM AND MARGIN sro?.

Application mea August 25, 192i. seriaifm, 495,329.

To all fecit-0m t concern 'Be it known that I, OTTO A. HonAN-soN,

a citizen of the United States, residing at "Woodstock, in the county of McHenry and State of Illinois, have invented certain new and useful Improvements in Line-Lock kMechanism yand Margin Stops, off which the following is a specilication.

This invention relates to typewriter mechanism. and especially to that portion of the mechanism by which the operator is notified that the writing is approaching the end of a line and by which the operation of the typewriter is arrested .at a predeterminedv point at the end of a line.

The invention has for its object the provision of mechanism of the class named which shall be of improved construction and cfm-ation and is eXempliied in the combination and arrangement of parts shown in portion of a typewriter showing one embodinient of the present invention applied theref;

Fig. 2 is a horizontal section substantially on line 2--2 of Fig. 1;

Fig. 3 is a front elevation of the' line lock mechanism with parts in section; and

Fig. 4 is a perspective view of a margin stop. v

In the drawings the invention is illustratd as applied to a folding typewriter having a main trame 10 and a platen carriage frame 11 which is plvotally mounted on the main frame to swing into and out of operating position. The platen carriage frame 11 is provided with ways 12 having ball bearings 13 for supporting thep'laten carriage 14. The carriage 14 is provided at each end with an upright end plate 15. on which a platen 16 is journaled. The end plates-15 have arms 17 pivoted at 1S thereon and the arms 17 are connected by a stop bar 19. One of the arms 17 extends upwardlyv to form afinger-piece 20 by which the stop bar 19 may be swung rearwardly. The bar 1-9 is provided with notchesv 21 on its forward face and 22 on its lower tace. A stop23 is slidably mounted on the bar 19 and is formed ot a .pi'eceofA sheet metalbent to provide a sleeve :surrounding the' bar and having a .downwardlyprojec'ting flange 24 which carries a Contact foot `25xat its lower end. A..lange 26' is .bent upwardly from one edge or the lower wall of the sleeve to engage the notches 2,2 on the stop rbar and `a spring 27 is rivetedat28 to the under face of the .top wall of the sleeve 'to' resiliently hold the' vflange `26 in contact with the notches 22. When it is desired to adjust the stop along the barpressu'reon the upper face of vthe. stop will free the flange' 26 from the notches 22 andpermit the'. stop to slide freely `alo-ng the bar.

The head of the rivetl is elongated, as

shown at 29, to assist the spring 27 in holding the sleeve ina raised position relative to the bar. The head of the rivet 29 is rounded to permit tilting movement of the stop sleeve to disengage the flange 26. A

downwardly extending linger `30 is pivoted at 31 on the flange 24 and is held against movement in onek direction by engagement with the end of afslot 32 iny the foot piece 25'. Secured to thelower facel of the platen carriage trame 11 is a bracket l33 having a bell clapper 34 pivoted at 35 thereon. A bell 36' is' also secured to the .lower face of the platenV carriage frame 11 in .position to be struck by the clapper 34. Aspring 37 normally draws the' clapper toward the bell 36. A rearwardly extending arm 38 is securedto the c'lapper 34 and projects into the path of the contact finger 30.

As the carriage vmoves to the left, as viewedI in Fig. 2,.the stop 23 will assume the broken lineA position in Fig. 2 and the lcontact finger 30 will move theA arm 38 into the broken line position shown in that figure. This will 'retract the clapper 34 and as the carriage continues to move the linger 30 will slide past the arm 38 and release the' c-lapper permitting .it to return under the tension of the spring 37 and strike the bell 36', thus warning 'the operator that the end of the linel is being approached. Furth-er movement of the carriage to the left, as viewed in that figure, will bring the contact Jfoot 25 into engagement with an upwardly bentportion 39 on a lever plate 40 pivoted at 41 on the ylower face of the platen carriage frame 11. lThe plate 40 is provided with a slot 42 which engages a pin 43 on the frame 11 and limits the movement of the plate by its pivot 41. The spring 37 isconnected to the plate 40 and normally holds the plate in the position shown in Fig. 2. The plate 40 is provided with a rounded proj ection 44 which engages a bifurcated arm 45 on a bellcrank 46. The bell crank 46 is pivoted at 47 on the lower face of the frame plate 11 and has a for? wardly extending arm 48 provided with a;

hook 49 at its front end. The hook 49 lis arranged V,to engage .an 'upwardly extending arm 50 secured to a rocker bar v51 pivoted at 52 to the side plates of the -main frame 10. The rocker bar 51 is oscillated by a universal bar 53 positioned beneath the key levers 54 and connected with the bar 51 by links 55 and arms 56 and 57. The arm 57 is rigidly connected withthe bar 51, while the arm 56 is pivoted at 58 on the side of the frame 10. lThey two arms 56 and 57 havea pin and slot connection 59 and aspring 60 normally draws the arm 57 lock the printing mechanism of the type-v writer. i v

If it is desired to write inthe margin past the position atwhich the line lock operates, the linger-piece 20 maybe depressedu which will swing the bar 19 outwardly, thus free-V ing the flange 39 from the foot-piece As.

soon as these parts are moved out of contact with one another the spring 37 will draw they flange 39 to the right, asviewed in Fig. 2,V and bring it opposite the inner edge of the:`

foot-piece`25. If the linger-piece 2O is now released the inner edge of the foot-piece25 will rest 'against the outer face of the flange 39 and the carriage willfbe free to move farther to the'left. 'The movement ofthe lever plate by the spring 37 will release the hook 49 from the lever 50 and free the keylevers 54 fromthe line locking mechanism. The .operation of the typewriter may be resumed untily the carriage comes to the limit of itsmovement.

When it isdesired to return the carriage y'it is only necessary to move it to the left along the ways 12. 'It will benoted that the foot-piece 25 is proi'fidedon its right-hand edge with a beveled contact portion 61 which will engage the flange 39 and swing the bar 19 outwardly to permit the foot-piece to pass the flange. lWhen .the linger, 30 engages the larm 34 the finger will turn about its pivot 31 sothat the movement .of the carriage will f not be interfered with,v 1When the platen carriage frame is moved upwardly about its pivot for folding the line lock mechanism will fold with the frame and when it is returned to operating position the hook 49 will resume its place adjacent the lever so that it will be in position to perform'itsl locking function when operation of the typevriter is resumed.

The movement of the carriage to the right Y is limited by a stop 23 similar to 23, but having its beveled surface and cont-act shoulder in reverse position from that of stop 23 so that the stop maybe shifted by the finger-k Y piece 20 for writing in the left-hand margin yand will l.return past the `contact 'member 39 H which engages with the beveled portion of,

the step foot 25 when the carriage-is again fed to the left and throws vthe stop `and bary outwardly, as in the case of stop 23.

l cla-im 1. ln a typewriter, a universal bar, an oscillatory member operated by said universal bar, a lever having a hook thereon for engaging said oscillatory member to prevent operation of said universal bar, a. platen carf y riage movable on saidtypewriter, andmeans for actuating -said lever to. lock said'loscillatory member when said platen carriage approaches the end of its travel. l

2. lnl a typewriter, a main frame having key leversy thereon, an upwardly projecting -arinon said mainA frame and arranged to be oscillated by said key levers, a supplemental frame movably mounted on said main frame and having a platen carriage movable transversely thereof, and a lock carried by said supplemental frame andarranged to engage said upwardly projecting. arm on said main frame to hold said arm against operation when said carriage approaches the end p of its travel.-

3. ln a typewriter, a supporting frame, a platen carriage arranged to travel transversely thereof, a. stop bar pivotally mounted on said platen carriage to swing in' a direction transversely of said bar, a stop adjustablyz mounted on said baigkey levers for said typerwriter, a catch on said supporting frame for locking saidkey levers against operation,

. and means connected with said catch and arranged tobe engaged by said stop to cause said catch to lock said key levers against operation when said platen carriage approaches the end of its travel. r

v 4. ln a typewriter, a supporting frame lia-ving aplaten carriage movable transversely thereof,l a stop bar movably supported on said carriage, a stop arranged on .said bar, said stop comprising a sheet metal sleeve having a fixed tooth thereon for engaging notches in said bar, a spring for holding said tooth in contact with said-notches,and afoot-piece projecting downwardly from said sleeve and having al contact face in onefside thereof and a beveled face at the opposite side thereof lll) for swinging said stop bar upon said carriage to permit. move-ment of said carriage in one direction without interference by said'stop.

5. In a typewriter, a platen carriage, a stop bar movably mounted on said carriage and having notches therein, a stop slidably mounted on said stop bar, said stop having a tooth-piece thereon for engaging said notches, a spring 'for yieldingly holding said toothpiece in contact with a notch on said bar, a pivoted contact linger on said stop, means for holding said linger against movement in one direction while permitting movement thereof relative to said stop in the opposite direction, and a contact foot on said stop having a stop :tace at one side thereof and a beveled tace at the opposite side thereof lor moving said stop bar to permit travel of said carriage in one direction.

6. In a typewriter, a supporting `trame, a platen carriage arranged to travel along said frame, a stop bar on said carriage, a stop adjustably mounted on said bar, an alarm device on said supporting frame, a contact member on said stop arranged to actuate said alarm device when said carriage moves in one direction but permitting tree movement of said carriage in the opposite direction without affecting the alarm device, a second contact member on said stop, line lock mechanism on said support" ing frame engaged by said second contact member subsequent to the operation ot said alarm device, manually operated means for swinging said stop bar to permit movement of said carriage after the operation of said line lock mechanism to continue the writing operation in the same line, and means on said stop for moving said stop bar on said vplaten carriage to permit return movement of said carriage without interference by said line lock mechanism.

In a compactible typewriter, amain frame, key levers on said main frame, a universal bar operated by said key levers, an oscillatory member actuated by said universal bar, a platen carriage trame oldably mounted on said main trame, a latch on said platen carriage trame movable into and out of position to cooperate with said oscillatory member when said platen carriage frame is folded, a platen carriage arranged to travel transversely ot said typewriter on said platen carriage frame, a stop bar pivotally mounted on said pla-ten carriage frame, a finger-piece for moving said stop bar, a stop on said bar having contact devices thereon, an alarm on said platen carriage frame and having actuating means projecting in the path of one of Said contact members on said stop so that said alarm is operated by the movement of said carriage as it approaches the end of a line, and a lever having a contact member thereon projecting into the path of the other contact member on said stop, said lever being arranged to actuate said latch to lock said universal bar and key llevers aga-inst operation subsequent to the operation of said alarm device, said finger-piece being movable to shift said stop bar and :tree said latch to permit further writing in the same line subsequent to the operation of said latch.

8. In a typewriter, a main frame having key levers and a universal bar carried thereby, a supplemental frame pivotally mounted on said main frame, a platen carriage movable on said supplemental frame, a pair of arms each having one end pivotally mounted on said platen carriage, a stop bar connecting the other ends of said arms, a linger lever connected with one of said arms for moving said stop bar bodily in a direction transverse to the length thereof, a stop adjustably mounted on said stop bar, a signal lever pivoted on said supplemental frame in position to engage said stop as said carriage moves along said supplemental frame, a bell crank lever pivotally mounted on said supplemental frame having one end thereof arranged in the path of said stop in position to be engaged thereby subsequent to the engagement of said stop and signal lever, a catch mounted on said supplemental frame and actuated by said bell crank lever, a movable member connected with said universal bar and arranged in position to be engaged by said catch when said bell crank lever is actuated by said stop, and a common spring connected to said signal lever and bell crank lever to hold said levers in position to be engaged by said stop.

9. In a typewriter, a main frame having key levers and a universal bar mounted thereon, an oscillatory member connected with said universal bar and actuated by said key levers, al supplemental frame pivotally connected with said main frame and having a catch pivotally mounted thereon in position to engage said oscillatory member when said supplemental frame is in operative position to hold said oscillatory member and universal bar against operation, a bell crank lever pivotally mounted -on said supplemental frame and having pivotal connection with said catch, a platen carriage mounted to move along said supplemental frame, a stop bar carried by said platen carriage, an adjustable stop on said stop bar arranged to engage said bell crank lever and actuate said catch to engage said oscillatory member when said carriage reaches a predetermined position in its travel, and means for shifting said stop bar in a direction transverse to the length thereof to tree said stop from said bell crank lever.

ln testimony whereof l have signed my name to this specilication on this 22nd day of August, A. D. 1921.

OTTO A. HOKANSON.

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