US1496876A - Combined paper-feed and finger-releasing mechanism - Google Patents

Description

June 10,1924. 1,496,876

M. GARBELL COMBINED PA PER FEED AND FINGER RELEASING MECHANISM "Filed Dec. 13. 1920 2 Shasta-Shoot. 1

June 10 1924.

' M. GARBELL COMBINED PAPER FEED" AND Fiuesg RELEASING? MECHANISM Filed Dec. 1;. 1920 2 shuts-she 2 Patented June 10, 1e24,.

MAX GABBELL, OF CHICAGO,

JENNINGS & COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS, ASSIGNCR, BY MESNE ASSIGNMENTS, TO 0. D.

ILLINOIS.

COMBINED PAPER-FEED AND FINGER-RELEASING NIECHANIS'M.

Application filcd December 13, 1920. Serial No. 430,214.

This invention relates generally to type-' writing machines, and has particular relation to improvements in the construction and arrangement of the paper supporting table or platform, the feed and guide pressure rolls for the paper, associated with the platen, of-the front-strike type of writing machines, and it consists in certain pecuharities of the construction, novel arrangement and combinationof the various parts thereof as will be hereinafter more fully set forth and specifically claimed.

The invention has for its principal object the production of a mechanism of the above named type having the qualities of all adaptability that is requisite in View of the various positions, and thicknesses of the paper for which it is used, for convenience in inserting, adjusting and withdrawing the sheets, for obtaining a more comprehensive control of the pressure rolls or means, and

the possibility of economical manufacture.

In carrying out the above named objects, one feature of the lnvention consists 1n employ ng a construction, in which overhead pressure rolls or means for holding and and presguiding the paper on the platen, sure rolls or means for feeding the paper, mounted in front and-rear, but below the platen, are used, whereby both the overhead and lower pressure means can be controlled by the same instrumentalities and operation.

Another feature is to provide at the rear lower portion of the platen, floating or selfad ustmg pressure means, or a roll, which shall have independent tensioning means p with said rails and is provided-at its front.

from that of the lower front rolls or pressure means, and from that of the upper or' of which Various other novel features and objects of the invention will become obvious from the following description and explanation.

In the accompanying drawings, which serve to illustrate an embodiment of the .invention Fig.1 is a front face view of the carriage frame of a typewriter, showing my improvements mounted thereon and illustrating fragments of the supporting frame for the carriage frame in section. i r

Fig. 2 is an end View of like parts.

Fig. 3 is a greatly enlarged sectional View taken on line 3-3 of Fig. 4 looking in the direction indicated by the arrows, showing a portion of the platen, a part of the paper table or platform, and a portion of the rear pressure feed roll showing the manner in which the same is mounted and actuated.

Fig. 4 is a transverse sectional w iew taken on line l 1 of Fig. 1v asindicated by the arrows, illustrating the parts of the mechanism in their normal positions, and

Fig. 5 is a similar View taken on the same? line but illustrating the-parts locked in their released positions. 2

Corresponding numerals of l reference designate like parts throughout the different views of the drawings. 5

The platen 8 of the mechanism, is mountedfor rotation, by means of a shaft 9 thereon in and between'the end pieces 10 and 11 of the carriage of the machine, which pieces may be connected together at their lower portions by the carriage rails 12 and 13 on which the end plates or pieces may besecured in an upright manner near the ends of.

said rails. in any suitable way. The shaft 9 of the platen may have on each of its ends a knob 1 1 by means of which the platen can be rotated when desired.

The-carriage frame rails 12 and 13 are connected together in parallel spaced relation withone another by means of a tie late 1 1 which is substantially co-extensivc the inner surface of the rail12 by means of screws 16 engaging suitable openingsin said rail'a'nd lock nuts 17 on said screws. That portion of'the tie plate or bar 1 1 opposite the extensions is secured to the lower portion of the rail 13 in any suitable manner and by preference has a reduced extension 18 projected a slight distance outwardly from the outer surface of the rail 13 for the purpose to be presently explained. As shown, each of the rails 12 and 13 is provided on its outer surface with an angular race-way 19 for the reception and operation of anti-friction balls 20 which are located in longitudinally disposed angular race-ways or grooves 21 formed in the inner surface of each of the carriage rail supports 22 and 23 which supports are in the form of rails and are horizontally mounted in parallelism with one another, at sufficient distances apart to embrace there-between the rails 12 and 13 of the ca riage frame and the antifriction balls 20.

A tie plate or frame including parallel spaced rails 24 and 24 extended transversely under the rear portions of the end pieces 10 and 11 of the carriage frame, and cross bars 25 uniting the rails 24 and 24 near their ends and extended forwardly and slightly downwardly from the rail 24, supports the carriage rails 22 and 23 and said tie plate or frame is by preference located on adjustable screw-posts 26 seated on the upper portion of the main supporting frame of the machine at the rear and front ends thereof.

As shown in Figs. 4 and 5 of. the drawings, the upper surface of the rail 24 is provided with a longitudinally extended recess 28 into which the projection 18 of the tie bar or plate 14 is extended and the front surface of the rail 23 overhangs said re cess, by which arrangement it is evident that upward movement of the carriage rail 13 willb'e prevented.

Journaled at its ends in the lower front portions of. the end pieces 10 and 11 is a rocker bar 29, and journaled at its ends in the upper rear portion of said end pieces is another rocker bar 30 which serve to as sist insecure'ly' uniting said end pieces and which are by preference angular" in crosssect-ion except at their ends, which are cylindrical in order to fit in correspondingly shaped openings in the end pieces 10 and 11. to permit of rocking movement of said bars.

At one end of the bar 29 a spring 31 is coiled there-around and has one of its ends connected to a fixed support, in the present instance to the tie bar or plate 14, and its other end in engagement with an arm 32 fixedly'mounted on the bar 29 and extended inwardly thereof between the end plate 11 and the endof the platen adjacent thereto. Mounted on the bar 29 so as to turn therewith, and by preference, for longitudinal adjustment thereon, is a pair of spaced paper holding or guiding fingers 33 which may be of any suitable material, but by preference of flexible sheet metal. fingers are substantially segmental in shape and each of them has near its free end a pair of outwardly extended ears 34 between each pair of which is journaled a rubber or rubber tired roll 35 to press or hold the paper against the front upper portion of the platen in the operation of the machine, for it will be seen and understood that the fingers are vertically mounted on the rockerbar 29 in front of the platen in such a manner as to cause the rollers 35 which they carry to overhang or overlie the platen. The ears 34 are preferably punched out of the upper portions of the fingers 33, thus providing an opening 36 in each of the tingers through which portions of the rolls will extend to contact with the paper or platen.

Mounted on the shaft or bar 30 so as to turn therewith, is a paper table or shelf 3'? which is by preference made of resilient sheet metal and substantially S-shaped in cross-section as shown. This table or shelf constitutes a part of the paper feed and extends somewhat above and rearwardly of the bar 30 on which it is mounted, and also extends downwardly and forwardly and then upwardly near the lower surface of the platen. The table 37 is provided in its front lower portion, or near its front edge, with a pair of longitrulinally elongated openings 38 which are aligned and spaced at their adjacent ends. At each end of each of the openings 38 the table is provided with a depending aperture'd ear or bracket 39, which are by preference integral with the table. Journaled on each pair of the cars 39 is a rubber or rubber tired pressure roll 40 a portion of each of which extends through the openings38' su'fiiciently to contact with the paper or platen when the table is properly positioned in the operation of the machine. Rearwardly of the openings 38' the table 37 is provided with another opening 41 which is" extended longitudinally in parallelism with the openings 38 and may be of any desired length. At each end of the opening 41 the table 37 is provided with a depending ear or bracket 42 each of which has therein an upwardly extended slot 43, which slots are for the reception of stubshafts 44 on theends of a rubber tired roller 45, which is so mounted on the ears 42 as to extend slightly through the opening 41 so asto contact with the paper and. lower portion of the platen in the operation of the machine. 7

Fixedlyunounted on the rocker-bar 30 near the end plate or piece 11 of the car-- riage frame is a downwardly and forward ly extended arm 46 which has atits front or free end a laterally extended lug 47 adapted for engagement with an arm 48 of a double bell-cranlc-lever which lever is des- These ignated as a whole by the numeral 49 and is journaled on the shaft 9 of the platen near the inner surface of the end plate 11 and preferably at the right hand side of the machine. This lever consists of the arm 48 which extends upwardly and rearwardly, the actuating arm or lever 50, which extends upwardly and, forwardly from the shaft 9, and another arm 51 which extends downwardly and forwardly from said shaft. The arm 51 is provided with a cam slot 52 for the reception and operation of a lateral projection 53 on the arm 32 near its inner or 'free end.

As shown,the actuating lever or arm 50 of this double bell-erank-lever extendsbeyond' the periphery of the platen and by preference has its upper portion flattened to provide a finger or thumb rest when it is desired to actuate the various parts so as to release the pressure rolls from the platen or paper, which may be done by pressing the lever 50 rearwardly.

Secured to the front surface of a bracket 54 extended upwardly from the carriage rail 13 is a depending spring 55 which rests at its lower portion against the rear surface of the table 37 and is employed to normally hold said table and thepressure rolls which it carries in about the position shown in Fig. 4 of the drawings.

By reference to Figs. 3 to inclusive of the drawings, it will be seen and understood that the tie plate 14, is located at-some distance below the lower portion of the table 37 and that said plate has mounted on its lower surface outwardly of the stub shafts 44 of the roller at each end of said roller an inwardly extended spring 56, each of which has its inner or free end upturned as at 57, and provided with prongs 58, between which the stub shafts 44 will rest. By this arrangement, it is apparent that the roller 45 will be supported in such a manner as to be self-adjusting, for instance, assuming that the roller 45 occupies the position shownin Fig. 4 of the drawings and it is desired to insert paper between said roll and the platen, this can be done by placing the lower ends of sheets of papers between the rear faces of the roller 45 and the platen, when by turning the latter, it is apparent that the supporting springs 56 on the tie plate will yield sufficiently to allow the paper to be fed forwardly, the slots 43 in the ears 42 of the table permitting of such movement without movement of the table.

The operation of the device is as follows:

Assuming that the parts are in the positions shown in Fig. 4 of the drawings, and it is desired to release the various pressure rolls or means from the platen, so as to properly position the paper on the same, it is only necessary to apply slight rearward pressure to the actuating lever 50, which action will cause the roller or projection 53 on the arm 32 of the rocker shaft 29 to ride upwardly a slight distance in the cam slot 52, which operation will release the pressure of the guiding or finger rolls 35 by reason of the fact that the arm 32 will be moved upwardly against the action of the spring 31, thus rocking the shaft 29 and thereby causing the fingers 33 to be moved forwardly of the platen.

In the above mentioned operation, it will be understood that by further rearward movement of the actuating lever -the roller or pro ection 53 will pass over the apex 52 in the lower wall of the'slot52 and assume the position shown in Fig. -5 of the drawings. As the actuating lever 50 :is pressed rearwardly, as above mentioned, itis manifest that the arm 48 of the double bell-cranklever will contact with the projection 47 of the arm 46 on the rocker shaft 30 and thus cause the table 37 to be moved away from the platen, and when the actuating lever 50 has reached the limit of its rearward movement, as shown in Fig. 5 of the drawings, the feeding pressure rolls, as well as the guiding rolls 35, will be locked in their released positions. To cause the rolls to again assume their normal positions, slight forward pressure may be applied to the actuating lever 50, or to one of the fingers 33, for an instant, and then removed from said lever or finger, when by reason of the tension of the springs 31 and 55, the parts will be reinstated in their normal positionsQ From the foregoing, it will be understood that the releasing movements of the rolls or pressure means 35, the pressure means 40, and the roll 45 will be effected in sequence or in succession as named, but in such a way that their release from the platen will be accomplished almost simultaneously and that after their release from the platen they will all be held or locked in their released positions, thus enabling paper to be placed in position and easily and properly adjusted with respect to the platen.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a device of the class described, the combination with a platen, of a plurality of pressure rolls co-operating therewith, independently operable resilient support for said rolls, means for actuating said supports to release said rolls from contact with said platen and for locking said supports in said last named position, said means including a lever rigidly connected to each of said supports, and another lever directly engaging both of said first mentioned levers to actuate the latter and the supports independently and in sequence.

2. In a device of the class described, the combination with a rotatable platen, of a each side of the platen, a lever rigid with each of saidsupport's and extended inwardly therefrom, a lateral projection on one of said levers, an actuating double bell-erank-lever operatively mounted between said levers and having in one of its arms a cam slot for the operation of said projection on one of said levers and another arm adapted to contact with the other lever or the supports.

3. A device of the class described, including in combination with a rotatable platen a paper table extended forwardly under the platen and having in its lower portion an elongated opening, a rocking support for said table, said table having at each end of the opening therein a depending bracket each provided with an upwardly extended slot, a roll jonrnaled in the slots of said brackets, a leaf spring suitably supported near each end of the said roller and independently thereof and each provided with a forked bearing tor the reception of the journals of said roller.

4. In a paper teed device for typewriting machines having a platen, the eon'ibination with a margin clamp resiliently and inclependently normally held against the platen,

of a paper table normally independently yieldii'igly movable toward the platen; a lower front feed roll normally engaging the platen; and a lower rear feed roll, one of said teed rolls being supported by and ad justable in unison with the feed table relatively to the platen, the other feed roll being normally yieldingly held to the platen and movable away therefromindependently of the table and of said roll supported by the table.

5; In a paper feed device-for typewriting machine's having aplaten, the combination with a margin clamp resiliently and independently normally held against the platen; of a paper table normally independently yieldingly movable toward the platen; a lower front feed roll normally engaging the platen; a lower rear feed roll, one of said feed rollsbeing supported by and adjustable in unison with the feed table relatively to the platen, the other feed roll being normally yieldingly held to the platen and movable away therefrom independently of the table and of said roll supported by the table; and means for moving said margin clamp, table and rolls away from the platen and to lockthem in disengagedgposition.

MAX GARBELL.

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