US983340A - Type-writer-platen-checking device. - Google Patents

Description

A. E. ZUMPEL. T YPE WRITER PLATEN GHEGKING DEVICE. APPLICATION FILED 001212, 191g.

' a I Nd wi/l'wcooeoz vwe M'oz Patented Feb. 7, 191 1.

ARTHUR E. ZUMPE, or ENGLEWOOD, NEW JERSEY.

TYPE-WRITER PLATEN-CHECKING DEVICE.

Specification of Letters Patent.

Patented Feb. '7, 1911.

Application filed October 12, .1910. Serial No. 536,602.

To all whom it may concern:

Be itknown that I, ARTHUR E. ZUMP'E, a citizen of the United States, residing at Englewood, county of Bergen, and State of New Jersey, have invented a new and Improved Type-W'riter-Platen Checking Device, of which the following isa specification.

' This invention relates to a novel attachment for typewriter platens by means of which the advance of thel'atter and the feed of thepaper beyond a desiredand-predetermined line is automatically checked.

It is desirable thatin writing a number offpages, t e written matter should terminate atthe-same line on each page, sothat a uniform bottom margin is provided. and aneat appearance of the gathered sheets is insured. In order to obtainthis desirable result, .with the platens hitherto used, the

oper :tor had always to bear'in mind not to write beyond av certain line. In this wayhis attentionwas detracted from. thewritwhilequite frequently he would write beyond the desired'terminal line, owing to his failure to stop the platen feed at the proper moment.

By my invent1on, the advance of the platen maybe automatically checked at any predetermined point,'so as to render it impossible for theoperator to write beyond the line selected asthe bottom of the pa e.

" In the accompanying'drawing: Figure 1 is a front view of part of a platen provided with my improved checking device; Fig- 2 a cross section on line 2 -2, Fig. 1; Fig. 3

an enlarged longitudinal section through the knob i Fig 4: a plan view thereof; Fig. 5 a perspective iew of the stop lever, and

Fig. 6 a'face view'of-the toothed collar.

, The numeral 10 indicates the rotative typewriter platen provided with the conventional feed ratchet wheel 11, theaxis 12 of'the' platen being hiing in the carriage frame'13 all-as usual. Near its free end,

shaft 12 is provided with a relatively fixed collar-14 which is accommodated by a corresponding inner recess 15 of aknob Al Thejlat-ter is-freely-rotatable. on shaft 12 and is =p'refer ab ly composed of a cylindrical body lfi andan enlarged flanking rim -17,

which"may berea dily grasped by the operator. 'At-its outer'face, collar '14 is provigled with a'serie's of teeth 18 which are adapted to be engaged by the correspondin teeth 1-9 of knob A, the parts 14, 16 c'onst1- tut-ing respectively fixed and movable coupling members. Teeth 18, 19 are normally maintained in operativeengagement by a spring 20, interposed between an inwardly extending flange 21 of knob A and adisk 22 secured to the free end of shaft 12 by ar ac-- forms part of a split sleeve 28 that slidablyencompasses a pin 29 secured to a holder 30 of frame 13. Detent 27is provided with an upturned finger piece 31. so that hook; 26

may be readlly brought into'oroutof en gagement' with groove 25 by correspondingly turning the detent on pin 29. In

order to prevent an accidental disengagement of hook 26 from groove 25'.and to maintain the stop lever in its raised position whenever desired, pin 29 is made angular (Figs. 1 and 2) while the free inner edge 32 of the split sleeve 28 is turned slightly inward (Fig. 5), thus providing a springy connection between pin and sleeve.

The length of spiral groove 25 should be such as to permit thelrota-tion of platen 10 to such an extent that asheet of conventional size maybe filled with writing, while leaving the customary margins at top and bottom. If it is desired to write a page, detent 27 is raised, the sheet is applied'to platen 10 and knob A is turned forward to rotate said platen until the sheet islin proper position for the starting of the writing. Detent 27 is outward to disengage teeth '19 from teeth 18.

The knob is then turned backward until hook 26. owingto the springy connection between parts 28, 29, enters groove 25 and abuts against the rear wall 33 of' the widened end 34 of said groove, whereupon the knob is released to effect a rengagement between teeth 18, 19. The writing 1s then startedduring which operation, platen 10 is intermittently advanced by actuating the customary feed mechanism (not shown) that engages ratchet wheel 11. In' this way, ;knob A will also be rotated, and detent 27 will be gradually moved outward on in 29 until its hook 26 during the continue rota- I -tion ofplate 10 abuts against the end 3501 groove 25. When the operator attempts to again actuate the platen feed.mechanism, he

will ascertain that the platen cannot be further advanced and he will thus be advised without inspect-ion or other mental efiort that the page is 'full. After throwing back detent 27, the sheet may be removed from the typewriter, whereupon the operation is repeated. Means should further be provided that effect a checking of the paper feed before the detent 27 engages the end of groove 25 so that the device may be set for lar er and smaller pages. For this purpose, a p urality of spaced sockets 36 issh'own to be formed in the bottom ofgroove 25 which are adapted for the reception of a plug or stop 37 having grip 38, but it is obvious that other convenient means may be rovided for rendering part of groove 25'ine ectivewithout departing from the spirit of my inven-. tion. These pockets may be numbered as shown in Fi 1 to constitute a scale by -form1ty in the filled pages.

means of which the number of line spaces may be ascertainedthrough which a rotationof platen 10 may take place before hook 26 will strikestop 37. By selecting the proper socket 36 for lug 37 the device may thus be set to any esired number of lines. To prevent hook 26 from entering the'op'en sockets 36, the former is provided with a pair of shoulders 39 adapted to ride on the periphery of cylinder 16. I

It will be seen that by my invention, the writing may be automatically stopped at any desired distance from thebottom of the page, thus obviating frequent inspect-lon by the operator and insuring neatness and um- I claim: p

1. In a device of the character described, a rotative typewriter platen, a shaft carrying the same, a knob on said shaft, said knob' being adapted to be either coupled to the shaft or to be'rotated independently therefrom, and adjustable means cotiperating with the knob for checking the rotation 7 thereof.

2. In a device of the character described, a rotatiye typewriterplaten, a shaft carryingthe same, a knob axially displaceable on the shaft and adapted to be coupled thereto,

said knob constituting a handle for manually operating the platen, a spring that tends to maintain the knob and shaft in operative engagement, and means 'coii'perat'ing with said knob for checking the rotation thereof.

3. In a-device of the character described, a rotative typewriter platen, a shaft carry-' ing the same, a knob axially displaceable on the shaft and having a s'iral groove, said I knob constituting a han le for manually operatin' the laten coupling means on said knob an shaft, a spring tends to close pling means on said knob and shaft, a spring that tends to close said coupling means, and a detent removably engaging said groove.

5. Inadevice of the character described, a rotative typewriter platen, a shaft carrying thesame, a knob axially displaceable on the shaft and having a circumferential j -spiral groove, said knob constituting a handle for manually operating the platen, coupling means on said knob and shaft, a spring that tends to close said coupling means, and a slidablestop lever. removably engaging said groove.

6. In a device of the character described, a rotativetypewriter platen, ashaft carrying the same, a knob axially displaceable on the shaft and having" a circumferential spiral groove,-, said knob constituting ahandle for manually operating-the platen, coupling means on said knob and shaft, a spring that tends to 'close said coupling means, a pin-and a stop lever slidable on said in and adapted to engage said groove.

7. n a device of the character described, a rotative typewriter platen, a shaft carrying the same, a knob which is normally coupled to said shaft and has a circumferential spiral groove, saidknob constituting a handle for manually operating the platen,

anadjustable stop in said groove, and a detent removably engaging said groove and stopa 8. In a device of the character described.

a laten, a shaft carrying the same, a toothed and having a spiral roove,'.-a.nd a detent adapted to engage sai groove 10. In a device of'th character described,

a laten, a shaft carrying the same, a toothed co lar on said shaft, :1 toothed sprin -infiuenced knob adapted to engage the col er and having a socketed spiral groove, 8. stop adapted to be fitted into either of the groove-.-

co lar on said shaft, a toothed spring-influenced knob adapted to engage the collar,

sockets, and a-detent' adapted to engage said ,7

' groove and stop.-

ARTHUR E. ZULIPE. \Vitnesses:-

FRANK v. 'BRrasEN, Karma-rm; KOCH.

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