US726591A - Paper-guide for type-writers. - Google Patents

Description

PATENTED APR. 28, 1903.

A. SWINDLEHURST. PAPER GUIDE POR TYPE WRITERS.

APPLICATION FILED JULY l0, 1902.

No MODEL.

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ALBERT SWINDLEHURST, OF MONTREAL, CANADA, ASSIGNOR TO THE OLIVER TYPEWRITER COMPANY, OF CHICAGO, ILLINOIS, A CORPO- RATION OF ILLINOIS.

saeenmeuins Foa TYPE-wm'rene SPECIFICATION forming part of Letters Patent No. 726,591, dated April 28, 1903.

Application ledJuly l0, 1902. Serial No. 115,083, (No model.)

To @ZZ whom, t *may concern:

Be it known that I, ALBERT SWINDLEHURST, ofMontreal, county ofI-Iochelaga, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Paper-Guides for Type-Writers; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which formapart of this speciiication.

This invention relates to improvements in type-writing machines, and refers more speciiically to guiding devices for guiding the advance edge of a sheet of paper upon the platen as it approaches the striking-point of the typeheads and for holding the same properly engaged with the platen at the time it receives the impression of the types.

My improvements are herein shown as applied to an Oliver type-writing machine of the general construction shown and described in the prior patent 4to Thomas Oliver, No. 599,863, granted March 1, 1898; but said improvements may be applied to machines of other kinds to which they may be adapted.

As shown in the drawings, Figure lis a perspective view of the type bar supporting frames of an Oliver type-writing machine, showing the standards by which they are su pported from the machine, a part of the earriage, and a portion of the carriage-shifting frame. Fig. 2 is across-section taken through the carriage and platen, presser-rollers, and paper-guides and showing also a portion of the shifting-frame.` Fig. 8 is a perspective view of one of the paper-guides embodying my invention removed from the machine.

As shown in the drawings, A designates the rotative platen, the shaft a of which extends through and has rotative engagement with end plates B Bof the carriage-frame. Said platen-shaft is provided at one end with a turning-knob A.

C C designate U -shaped type-bars, of which there are two sets, one located on each side of the striking-point of the types. But one bar of each set is herein shown. Said type-bars are supported on a frame consisting of an anguiar bottom frame I), to which said typebars are pivoted, a loop-frame D, rising from said frame D, and an oblique support D2, against which Ihe type-bars rest when thrown backwardly from the platen. frames are supported on the upper ends of standards E, which rise from the base E' of the machine.

E designates a portion ofthe carriageshifting frame, and F' the front rail thereof, on which the carriage travels during the operation of printing.

G designates the forward horizontal longitudinal bar of the carriage, on the rear margin of which is formed the rack-bar, which constitutes a part of the letter-spacing mechanism of the machine. Said bar G is provided with rollers G, which rest and roll upon the bar F of the shifting-frame.

H H I-I2 designate presser-rollers located beneath and in front of the platen, between which and the platen the advance edge of a sheet of paper is guided as it is inserted into the machine and which act to press and hold the paper against the platen. Said rollers are supported in the machine-frame in the same manneras shown in the said Oliver patent hereinbefore referredto. As these features of the construction constitute no part of the present invention, they need not be more fully herein described. A strip I, marked with a scale, is mounted on the upper free ends of the supporting-arms 72, of the upper front rollers H2. Said strip is loosely connected at its ends with said arms, so that the free margin thereof may adjust itself with respect to the platen.

J designates the lower guide-plate, which is attached at its ends to the end plates of the carriage-frame in rear of the platen and inclines downwardly and forwardly to direct the entering margin of the sheet of papervbetween the platen and lower rear presser-roller H.

K designates an upper guide-plate located above the plate J and connected at its ends with the end plates B of the carriage. Said plate K is located in position to receive the advance edge of the paper as it passes from Said type-bar the platen to guide said paper away therefrom and to prevent it from reentering the space between the platen and the advance presser-roller H.

The foregoing parts of the machine are similar to the construction shown in the prior patentto Oliver, hereinbefore referred to, and only such parts of the machine are illustrated as are necessary to an understanding of the application of my present improvements to said machine.

Referring now to the improvements constituting my invention, they are constructed as follows: L L designate two curved guideplates located between the carriageplaten and the type-bar-supporting frames D, between which and the platen the advance edge of a sheet or sheets ot' paper pass as the same reaches the top of the platen or the strikingpoint of the types, said plates acting to hold the paper in close contact with the platen during the operation of printing. Said guideplates L are curved at their rear parts to conform to the curvature of the platen. At their adjacent ends the said plates preferably extend toward each other slightly beyond the supporting-frame for the type-bars and at their outer ends reach nearly to the ends of the platen. Said guide-plates L may be supported in any suitable manner over the platen by means holding the plates longitudinally immovable with respect to the carriage, so that the platen Awill move backwardly and forwardly beneath the guide-plates. As herein shown, said plates are mounted on vertical standards or posts M, which are attached at their lower ends to the part F ofthe shifting-frame, said standards being provided with integral horizontal lugs or projections M, which extend beneath said part F of the shiftingframe and are rigidly affixed thereto. Said standards extend upwardly in front of the platen, one adjacent to each of the standards E, which support the type-bar frames. In order to provide means for permitting movement of the guide-plates toward and from the surface of the platen in order that uniform pressure of the guide-plates on the paper may be maintained when a greater or less number of sheets of paper are used, as in duplicating by carbon-paper and under other circumstances, the guide-plates have vertically-movable connection with the supportin g-standards M. In the particular construction illustrated the guide-plates L are connected with said standards M by means of integral shanks L', which are bent downwardly from the forward margins ofsaid guideplates and have sliding connection with the standards. As herein shown, said standards are provided with loops m', which are secured to the same and through which the Shanks L of the guide-plates extend in the manner shown in Fig. 3. This construction affords vertically-sliding connection of the guideplate shanks with the standards and permits said guide-plates to be shifted upwardly and downwardly with respect to their supportingstandards to admit'the passage of paper of Varying thicknesses or a greater or less number of sheets of paper between the same and the platen.

Means are provided for yieldingly holding the guide-plates L in contact with the platen or a sheet of paper passing between the same and the platen, so that said plates will automatically accommodate themselves to papers of Varying thicknesses or varying numbers of sheets of paper. As herein shown, such yielding connection is afforded by means of springs L2, so applied as to act downwardly on the guide-plates, said springs preferably having the form of spiral contractile springs, one end of each of which is attached to a hook Z on the shank L and the other end to a similar hook m2 on the standard or post. In assembling the parts the springs L2 will usually be placed under tension, so that said plates will bear with a slight degree of pressure against the platen.

The inner or adjacent ends of the guideplates L are provided with upwardly-curved lips Z', which act in the endwise movement ot' the platen to guide the side marginof a sheet of paper between the guide-plate and the platen in the event of a sheet of paper or envelop being used which is so narrow that one or both of its side margins pass beyond or inside of the inner end of one of the guideplates when the platen reaches either limit of its endwise movement. Said upwardlycurved lips stand inside of the inner end margins of the plates, so as to engage the margin of the paper in advance of the end margins proper of the guide-plates, and thus insure the entrance of the paper between the plates and platen.

It will be noted that in the construction described, wherein the guide-plates are attached to the shifting-frame, said plates move backwardly and forwardly with the carriage, and therefore maintain their lateral position relative to the platen.'

The yielding connection of the guide-plates with the parts which support the same is of considerable importance, for the reason that thereby a substantially uniform pressure is exerted upon the paper at the top of the platen notwithstanding variations in the thickness of the paper or the number of sheets used, asin making a number of carbon copies. Obviously if the plates be immovable toward lOO IOS

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and from the platen the pressure on papers instance, on the lower side of the type-bar frames, 'as in my prior patent, No. 691,503, dated January 21, 1902.

I claim as my invention- 1'. In a type-writing machine, the combination with the carriage-shifting frame, the carriage and platen, of type-barsupporting frames located above the platen, and guideplates located Vbetween the said type bar frames and the platen, said guide-plates being connected with and supported by the shifting-frame.

2. In a type-writing machine, the combination with a carriage-shifting frame, a carriage and platen, of type-bar-supporting frames located above the platen and guide-plates located between the type-bar frames and the platen, and means4 for movablyt supporting said guide-plates on the shifting-frame, affording movement of said guide-plates toward and from the platen.

3. In a type-writing machine, the combination with a carriage-shifting frame, a carriage movable longitudinally thereon, and typebar-supporting frames located above the platen, of guide-plates located between the type-bar frames and platen, and means for supporting said plates, affording movement thereof toward and from the platen.

4. In a type-writing machine, the combination with a carriage-shifting frame, a carriage and platen, of type-supporting frames located above the platen and guide-plates for holding the paper against the platen, said platen being located between the type-bar frames and the platen at either side of the printingpoint and means for movably supporting said guideplates on the shiftingframe, constructed to hold the same yieldingly against the platen.

5. In a type-Writing machine, the combination with the shifting-frame, and a carriage longitudinally movable thereon and provided with a platen, of guide-plates located above Said platen and supported on said shiftingframe, and yielding connections between said plates and the frame aording downward pressure of the plates upon the platen.

6. In a type-writing machine the combination with the shifting-frame and a longitudinally-movable carriage thereon provided. with a platen, a type-bar-supporting frame located above the platen, guide-plates located between said platen and the shifting-frame, shanks on said guide-plates and standards attached to the shifting-frame with which the said Shanks have endwise sliding engagement.

7. In a type-Writing machine, the combination with the shifting-frame and a longitudinally-movable carriage thereon provided with aplaten, of guide-plates located above said platen,and provided with downturnedshanks, Standards affixed to said shifting-framewith which said Shanks have longitudinal sliding engagement, and spring connections between said Shanks and standards producing downward pressure of the guide-plates on the platen.

8. In a type-writing machine, the combination with the shifting-frame and a longitudinally-movable carriage thereon provided with a platen, of guide-plates thereon located above the platen and provided with downwardlyprojecting Shanks, tached to the shifting-frame and provided with loops through which extend the Shanks of Said plates, and springs connecting said standards with the Shanks whereby said plates are held yieldingly against the platen.

In testimony that I claim the foregoing as my invention I aiix my signature, in presence of two Witnesses, this 27th day of June, A. D. 1902.

ALBERT SWINDLEHURST.

Witnesses:

H. H. THOMAS, A. T. SKILL.

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