US1594379A - Margin-stop mechanism for typewriters - Google Patents

Description

Aug. 3 1926. 1,594,379 J. A. RAMUs MARGIN STOP MECHANISM FOR TYPEWRITERS Filed 2 sheets-sheet 1` Aug. 3,1926. 1,594,379

J. A. RAMUS MARGIN STOP MECHANISM FOR TYPEWRITERS Filed oct. 17. 1925 2 Sheets-sheet l2 TAKES A. RAMUB, OF EHINET?" mrnnnso'ra.

Application led october It, serial no. 63,016.

This invention relates to typewriters and especially to mar in stop mechanisms therefor, capable of eing employed on many standard makes of typewriters now commercially sold.

vlit is the main object of the invention to provide simple but highly eicient margin stop mechanism co-operating with several parte of a standard typewriter to permit the ,margin stop on the typewriter to be automatically set by the manipulation of a single release lever and the movement ofthe sliding carriage. l Another object of the invention is to pro- 1 vide' margin stop mechanism operatively connected with the carriage release lever on certain types of standard typewriters adapted to cause the margin stop to releasably interloclr with the center stop of the typewriter, whereby the movement of the sliding carriage will cause the margin stop to be set as desired.

A further object of the invention is to provide such a device operative from the Wcarriage of the typewriter by means of a control lever, employing a margin stop with a latch carried thereby, adapted to interlock with the center stop of the typewriter and to also release the margin stop from the mari t@ gin stop rod, and an operating lever pivoted.

lon the escapement frame and adapted to en- A gage said latch, whereby the carriage may e moved to set the margin stop as desired. These and other objects will be apparent from the following description made in connection with the accompanying drawings, wherein like characters refer to similar parts throughout the several views, and in which. Fig. 1 is a plan view of the carriage and d@ adjacent parts of va standard form of typewriter, with the improved margin stop mechanism thereon;

' Fig. 2 is a cross section on a'larger scale taken on the line 2-2 of Figli lig. 3 is a cross sectional view showing th'elatch member on the margin stop in inter-engagement with thecenter post;

Fig. a is a fragmentary plan view showing a control lever and a portion of one of t@ the margin stops;

Fig. 5 is a side elevation ofthe control lever;

, Fig. ti is a side elevation on an enlarged scale ofthe operating dog carried by the top of the control lever; and

Figs. Z and 8, respectively, are a plan and side elevation of the preferred form of margin stop employed.

While the invention is applicable to several types of standar-d typewriters, such as @G the L. C. Smith, the Woodstock, the Remington Monarch and the lDemountable, the preferred embodiment thereof is herein illustrated as being applied to the standard type of typewriter manufactured by the Royal Typewriter Company;

in the drawings, the carriage is illustrated as supported by means of the usual bottom rail 10, (indicated in Fig'. 1 in the dotted lines) and by means of the carriage roll ia guide rod 11 engaged on opposite sides by means of the carriage rolls12 pivotally mounted to the upper end of the escapement frame 13. The carriage ends 14 have secured therebetween, in the usual manner, i5'

'the platen or printing cylinder 15 controlled by the cylinder knobs 15a, as well as the carriage roll guide rod 11 and the margin stop rod 16 spaced parallel and slightly to the rearward side 4of rod 11. The usual tek rack rail 17, having outwardly extending arms 17 at each end thereof, is normally heldin engagement with the escapement pinion 18 by means of coiled springsA 19 interposed between the outer endsof arms 17a e5 and the margin stop rod disposed thereabove. Rack rail 17 fulcrums on pivot screws 17b secured to. the carriagevends 14. and may be elevated to release the carriage by means of the carriage or rack release 00 levers 20 extending forwardly at either end of the carriage. The escapement vframe 13 carries the usual tabulator-rack-lift-leverfulcrum-screw 21. The usual center stop 22 on the type of typewriter illustrated is secured' to the :nain typewriter frame provided with the line lock lever 223 normally spaced therefrom. In the Royal typewriter the line lock lever 22 is preferably bent outwardly somewhat before installing the improved margin stop mechanism in order that the spaced relation between said lever and the center stop ,22 may be .present when the carriage is in extreme left position. As will be later shown in the operation of the preferred form of the invention, this slot or recess is necessary.

All of Athe parts hithertoI described are standard parts of the Royal typewriter and the cooperation of several of these parts, with the added elements of the margin stop mechanism, make possible the successful device hereinafter described.

In the embodiment of the invention designed for the Royal typewriter, as illustrated, as well as in most types of standard typewriters, right and lcft margin stops are rmployed identically constructed and having the body portion 23 of U-shaped cross section slidable on margin stop rod 16, carrying at one side thereof the -vadjustable abutment screw 23a adapted to engage center stop 22 to limit the movement of the carriage in one direction. It will be noticed (see Fig. 1) that when said margin and center stop are mutually engaged, the engaged surface of center stop 22 is disposed substantially centrally ot' the margin stop. Due, however, to the particular control mechanism for practically all types of standard typewriters when the carriage has been moved to the cxtreme right and released there is a small amountof play between center stop 22 and the abutment screw 23a of the left-hand margin stop. To take up this play and mutually engage said stop elements, the carriage must be held to its extreme right position. Applicant provides his margm stops with vertically swinging margin stop levers 24 eX- tending longitudinally of body members 23, and fulcrumed adjacent the inner ends thereof. Levers 24 are provided at their outer ends with the pivoted retaining pawls 25, adapted to engage teeth 16 on the margin stop rod 16, whereby the margin stop may be set in a desired position on said rod or released therefrom for setting. Each margin stop is provided with a transversely disposed vertically swinging latch 26 having depending arms disposed at either side of body member 23 and pivoted adjacent one side of said body member. The intermediate or body portion of latch 26 is disposed beneath margin stop lever 24 and is adapted to lift said lever when said latch is swung. Simultaneously with this action, when the carriage is held in either extreme right or left position, the rearwardly disposed depending arm of latch 26 will be projected between center stop 22 and line lock lever 22, interlocking the margin stop with the center stop 22. Thus, when the stop members are mutually engaged, the latch 26 will be aligned to interlock said members and release the margin stop from the margin stop rod 16.

To actuate the said latch on the Royal typewriter, a substantially V-sha-ped operating lever 27 is provided preferably fulcrumed at the vertex of the V on the tabulator-rack-lit-lever-fulcrum-screw 21 disposed Y on the escapement frame 13. The lowerV or forward end of operating lever 27 is extended forwardly and has a small roller 27* carried at its outer end, adapted to normally contact the upper surface of the rack rail 17. The rear or working arm of lever 27 is extended upwardly and substantially at'right angles at its outer end, best shown in Fig. 4, terminating in the upstanding earl 27b to which a vertically swingable operating dog 28 is pivoted, spring-pressednormally into elevated position. Operating lever 27 is resiliently held in contact with rack rail 17 by means of the coiled s ring 29 disposed about said tabulator-raclr-lift-lever-fulcrumscrew 21. The working arm of lever 27 is formed, as described and illustrated, in or- -der that the operating dog 28, carried at the upper end thereof, may be aligned with the forward depending arm of one of the latches 26 on the margin stops when the center stop 22 and one of the abutment screws 23a on the margin stops are mutually engaged by holding the carriage' in extreme left or right positions.

Operation.

When it is desired to set the left margin stop, the typewriter carriage is flirst moved to its extreme right position, the normal play between center stop 22 and left margin stop being taken up to mutually engage said stop elements in the manner previously described. The latch 26 will then be aligned with the operating dog 28 on lever 27, and, at its rearward end, with the slot between' center stop 22 and line lock lever 22a. The rack or carriage release lever 20 is then depressed, thereby elevating rack rail 17 and, in turn, swinging lever 27 backwardly. lOperating lever 27 as has been previously described, is actuated by the rack release lever and, obviously, actuates the forward arm of latch 26, swinging said latch to simultaneously release the margin stop lever 24 and to relcasably inter-lock the left margin stop with center stop 22. The left margin stop is now free to move with reference to margin stop rod 16 and is also rigidly inter-locked with the center stop 22. The carriage may then be moved to any desired point in line of writing, obviously moving margin stop rod 16 relatively tosaid left margin stop and, when the rack or carriage release lever 20 is released, the operating lever 27 and latch 26 will again take their normal positions and the left margin stop will be automatically set atthe point desired.

ln setting the right margin stop, carriage release lever 20 must iirst be depressed to permit movement of the carriage to the left. The carriage is then moved to extreme left position, at .which time the abutment screw 23 on the right margin stop will' engage the line lock lever 22Ll of center stop Since standard typewriter` carriages are normally impelled to the left, there will be no play between the stop elements when the carriage is in the above stated position, and the latch 26 on the right hand margin stop will be aligned with operating lever 27 and with the slot between center stop 22 and line lock lever 22a. However, inasmuch as it was necessary to depress the carriage release lever 20, in order to move the carriage to the extreme left, the operating dog 28 was moved rearwardly before the carriage was moved, sliding behind the forward depending arm of latch 26, as the carriage reached its eX- treme left position. To return operating dog 28 to normal position for operating latch 26, it is only necessary to release carriage release lever 20, which permits lever 27 'to swing forwardly, y cammihg the spring- 'pressed dog 28 to the forward side of latch 26. Vhen the carriage or rack release lever 20 is again depressed, operating dog 28 will again engage the latch 26, freeing the right margin stop from margin stop rod 16 and simultaneously interlocing the right margin stop with center stop 22. The carriage may be then moved to a desired osition in line of writing and the rack re ease lever released to set the margin stop automatically as desired. i

Vhile the embodiment of the invention illustrated is especially designed for a Royal typewriter, it will be readily seen that by slight changes in the form and details, the invention may be applied to other types of machines such as the L. C. Smith, Woodstock, Demountable, and Remington Monarch. All of these machines employ right and left margin stops settable on horizontally extending margin stop rods and a center stop or center stops cooperating therewith to limit the movement of the carriage. Several of these machines, however, mount their margin stop rod on the typewriter frame and their center stop on the carriage. All standard types employ a carriage release lever of some kind. It will be seen that devices within the scope of the invention may easily be4 designed -for all standard types of typewriters and will employ the latch and inter-locking mechanism disclosed and operatively connected tothe carriage release lever or an independent operating lever to set the left or right-hand y margin stop when the carriage has been moved to either extreme left or right positions. The operation of the deviceI applied to other standard types of machineswill be identical with the operation above described.

From the foregoing description, 'it will be apparent that the applicant has invented an extremely simple but highly ellicient margin stop mechanism adapted to automatically set right or left margin stops by the manipulation of a single operating lever in cooperation with the movement of the typewriter carriage.

It will, of course, be understood that varions changes may be made in the form, details, proportions, arrangement of parts and application of the same without departing from the scope of the invention.

What is claimed is:

l. In a typewriter having a movable carriage, a stop element supported on said carriage, a second stop element supported independently of said carriage in position to engage said first mentioned stop element, one of said stop elements being adjustable on its support, laterally projectable means on one of said stop elements adapted to releasably fix said stop elements together whereby the position of said variable stop element may be changed and set by the movement of said carriage.

2. ln a typewriter having a movable carriage, a stop element supported on said carriage, a second stop element supported independently of said carriage in position to engage said first ymentioned element, one

of said stop elements being adapted to be set at various positions on its support, means for releasing said variable stop element from its support. means for releasably interlocking said stop elements, whereby the i 4position of said variable stop element may be changed by the movement of said carriage and means for resetting saidvariable stop element in any position on its support.

3. The structure set forth in claim 2, and an operating lever adapted to control said several means.

4. In a typewriter having a movable carriage, a stop element supported on said carriage, a s econd stop ele-ment supported independently of said carriage in position to engage said first mentioned element, one of said stop elements being adapted. to be set at various positions on its support, a latch on said variable stop element capable of in- I terlocking with said other stop element when said elements are mutually engaged, and means for operating said latch whereby the position of said variable stop element may be changed and set by the movement of said carriage.

5. The structure set forth in claim 4, releasable means for locking said 'variable stop member in a plurality of positions on its support, -said latch being operative to also releasey said means.

6. In a typewriter having a movable carriage, a stop element supported on said carriage, a second sto element support/ed independently of sai carriage in positionfto engage said first mentioned stop element, one of said stop elements being adjustable* on its support, laterallyv projectable means on one of said stop elements adapted to releasably fix said elements together, and means for simultaneously releasing sa1d adjustable stop element from its support whereby said adjustableistop Aelement may be adjusted and set by the movement of said carriage. v

7. In a typewriter, the combination with a sliding carriage, a'margin stop rod and a center stop, of a margin stop mechanism` .comprising a margin stop adapted to engage said center stop to limitthe movement of said carriage in one direction, and capable of being moved and set at various positions on said margin stoprod, means for releasably interlocking said margin stop with said centerv stop when said members are mutually engaged, and means for releasing said margin stop for movement on said margin stop rod whereby said margin stop may be moved and set as desired by the movement of said carriage.

8. In a typewriter, the combination with a sliding carriage, a margin stop rod and a center stop, of margin stop mechanism comprising a margin stop adapted to engage said center stop to limit the movement of said carriage in one direction, a releasable retaining means carried by said marginstop, and a latch also carried by said margin stop adapted to aetuate said retainin means and to releasably-interlock said margin stop with said center stop when said members are mutually engaged, whereby said margin stop may be moved and set as desired on said margin stop rod by the movement of said carriage.

9. The structure set orth in claim 8 and an operating lever controllable from an aecessible point on said typewriter adapted to actuate said latch when said margin sto and said center stop are mutually engage 10. In a typewriter, the combinationwith a sliding carriage, a margin stop rod, and a rack rail, of margin stop mechanism comprising a settable margin stop slidably mounted on said margin stop rod adapted to engage said'eent-er stop, means on said margin stop for releasably interlocking with said center stop when said stop members are mutually engaged, and means connected to said rack rail for operating said interlocking means, whereby, when said rack rail is raised. said 'margin stop may be set at a desired position on said margin stop rod by the movement of said carriage.

11. In a typewriter, the combination with a sliding carriage, a margin stop rod, a center stop, a rack rail. and an escapement frame, of margin stop mechanism comprising a margin stop mounted on said margin stop rod, a latch carried by said margin stop adapted to releasably interlock with said center stop, a lever pivoted to said escapement frame having an arm adapted said carriage in position to engage said first mentioned element, one of said stop elements being adapted to be set at various positions on its support, means for releasably interlocking said stop elements when the same are mutually engaged and operating means connected to said carriage re'ease lever, whereby the position of said variable stop element may be changed and set automatically by the manipulation of the carriagev release lever and the lnovement of said carriage.

13. In a typewriter, the combination with a sliding carriage, a carriage release lever, a margin stop rod, and a center stop, of margin step mechanism, comprising a settable stop, slidably mounted onsaid margin stop rod, means on said margin stop for releasably inter-locking with said center stop when said stop members are mutually engaged, and means connected to said carriage release lever for operating said inter-locking means, whereby, when said carriage release lever is manipulated, said margin stop may be set at a desired position on said margin stop rod by the subsequent movement ot' said carriage.

14. A margin stop mechanism for a ty ewriter, having in combination a setta le margin stop 'adapted to be mounted on the margin stop rod ofl a typewriter, means on said margin stop for releasably interlocking with the center stop of said typewriter, and means for controlling said first mentioned means from an accessibe point on a typewriter, whereby said margin stop maybe set at various positions on said margin stop rod by the movement of said carriage.

15. In a typewriter having a movable carriage, an adjustable stop element releas- Y and limit the movement thereof, said carriage release lever being operative to simultaneously release said carriage and said margin stop from its support whereby said margin stop may be engaged by said carriage and automatically shifted by the movement of said carriage.

17. In a typewriter, the combination with a sliding carriage, a carriage release lever, a margin stop rod and a center stop, of mai'- giii stop mechanism comprising an adjustable stop slidably mounted on said margin stop rod, a laterally projectable member on said adjustable margin stop adapted to releasably interlock with said center stop when said stop members are mutually engaged, and means for o erating said member and releasing said ad]ustab1e margin stop from justable margin stop may be set at a desired position by the subsequent movement of said carriage.-

18. In a typewriter, the combination with a sliding carriage, an escapement pinion for controlling the movement thereof, and a center stop, of margin stop mechanism comprising an adjustable margin stop, means for simultaneously disengaging said carriage from said escapement pinion and interlocking said margin stop with said center lstop whereby when said carriage isv moved said margin stop may be adjusted and set at a desired position.

In testimony whereof I affix my signa ture.

JAMES A. RAMUS.

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