US774640A - Paper-feeding mechanism for type-writing machines. - Google Patents

Description

No. 774,640. PATENTED NOV. 8, 1904.

' F. H. ARMSTRONG; PAPER FEEDING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION nun MAY 14, 1904.

N0 MODEL. V 2 SEEETS-SHEET 1.

PATENTED NOV. 8, 1904 I. H. ARMSTRONG.

PAPER FEEDING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED MAY 14, 1904.

N0 MODEL.

amoantoz EM 7 5 QQrm ZrW g @Vihwoou mmwug UNTTED STATES Patented November 8, 1904.

PATENT Trice.

FRANK H. ARMSTRONG, OF AUBURN, NEW YORK.

SPECIFICATION forming part of Letters Patent No. 774,640, dated November 8, 1904.

Application filed May 14:, 1904:.

To all 2072,0711, it may concern.-

Be it known that I, FRANK H. ARMSTRONG, a citizen of the United States, residing at Auburn,Cayuga county, New York, have invented certain new and useful Improvements in Paper-Feeding Mechanism for Type-Writing Machines, of which the following is a specification.

My invention relates to the mechanism for pressing the paper to the platen and properly guiding it.

The object of the invention is to provide a simple and efiicient mechanism for the purpose described and in which the shaft carrying the several devices may be readily removed with its attached parts; also, to make the scale serve to hold the paper perpendicular to the platen; also, to provide the paper-pressing roller with means to allow it to adjust itself to irregularities of surfaces relatively between it and the platen. These objects I accomplish by the construction shown in the drawings, in which Figure 1 is a front perspective of my improved paper-feed with the feed-roller pressed away from the platen and the guide-plate Q, omitted. guide -roller, its carrying devices, and the scale. Fig. 3 is a front perspective with the guide-plate in place and the platen in section. Fig. 4 is a transverse sectional view. Figs. 5 and 6 are detail perspectives of the rollercarrying arms, their rock-shaft, and the guideroller shaft. Fig. 7 is a perspective of one of the spring-fingers and a portion of the platencarrier. Fig. 8 is a detail perspective of a portion of the guide-plate. Fig. 9 is a detail sectional view showing how the end of the roller-carrying rock-shaft is engaged at its end by an adjusting-screw.

A designates the platen-carrier, provided at its ends with posts A, in the upper ends of which the platen A is journaled. On the inner faces of these posts below the platen-bearings are formed angular bearing-slots a a,

which open upwardly and extend rearwardly to form bearings for the ends of the rockshaft B. This shaft may be readily inserted in these bearing-slots 0, a, where they are Fig. 2 is a rear perspective of the- Serial No. 207,986. (No model.)

held against accidental displacement by means of the screws (0 a, which extend inwardly through the front walls of the slots and hold the shaft in the rear closed ends of the slots. Upon the rock-shaft are mounted the rollercarrying arms C C, which extend forwardly under the platen and carry at their free ends the rubber roller D, which is pressed up to the platen by the spiral springs L L to hold the paper firmly against the platen, and so cause a proper feed. Endwise motion ofthe shaft B is prevented and endwise adjustment afiorded by means of the end screws 6, which pass through the posts A, with their inner ends in engagement with the ends of shaft B. The arms C C are loose on the shaft B, but are operatively connected to it, so as to rock with it, by means of pins T T, which project from the shaft and engage slots 0 0 in arms C C One of these slots, 0, does not allow any play of the pin T, while the other slot, 0, does not fit the pin T tightly; but there is a loose connection between the two. This allows the spring L to lift the arm C a little closer toward the platen, and this slight unequal movement of the arms causes the rubber roller D to be pressed up a little at one end, and so adapts it to conform to any inequalities on the surfaces of the platen. The arm 0 has a tinger-piece C integral with it, and by pulling forward on this finger-piece C the arms (l C will be depressed against the action of springs L L, and so move the rubber roller D away from the platen.

Q is the guide-plate which guides the paper between the platen and roll D, its lower edge lying along the space between the two. This guide-plate is slit at its lower edge and bent under to form the two integral eyes 1 (1, which encircle the shaft B and form bearings on which the guide-plate may rock. The guideplate Q is provided at its ends near its front edge with depending apertured ears g g, which are engaged by the inner ends of screws 1 I, passing through the arms 0 0 just in rear of the roll D. Thus the front edge of the guide-plate will be held rigid, and so properly guide the paper between the platen and feedroll D.

H designates a horizontal scale-plate held the feed-roll against the platen; one of the said vertically edgewise in front of the lower portion of the platen and upper portion of the feed-roll by means of rearwardly-projecting slotted ears /1 7a., through which are passed the same screws I that hold the guide-plate ears (1 to the arms C C. The scale-plate H is held from tilting on the screws 1. by reason of the fact that the ends of the shaft D of feedroller-carrying arms having a loose connection with the rock-shaft to allow one end of the feed-roller to yield with respect to the platen.

3. In a type-writing machine, the combination with a platen-carrier, of a rock-shaft mounted therein and having forwardly-projecting arms, a feed-roller in the outer ends of the arms, means for pressing the feed-roller paper being fed. By adjusting the shaft B longitudinally by means of the end screws 1) 1 the scale may be made to register with and ;t1on With a platen-carrier, of a rock-shaft 1 mounted therein and having forwardly-pro correspond to the spaces in the carriage-feed or escapement.

To further assist in the even feeding of the paper, I provide the spring-lingers R B, one i at each end of the carrier A. The spring-fingers extend upward from the carrier A in front of the platen and at their upper ends are curved rearwardly against the platen or the paper thereon, so as to hold it firmly in place. The

lower ends of these lingers R R are bent horizontally to form the bases R R, which extend under the platen-carrier to the rear edge thereof, where they are formed with u pwardlyprojecting lips 7' r to frictionally grasp said edge and hold the base in place. The forward edges of the base-pieces R R are formed with hooks r a which hook over the front edge of the platen-carrier. It will be seen, therefore, that these fingers R R may be easily attached by simply passing the base-pieces It R under the carrier till the hooks r w engage the front edge thereof and then by pressing the rear edges of the bases upwardly the lips 0' '2' will firmly engage the rear edge of the carrier and hold the lingers in place after the manner of a spring or friction clasp.

It is thought that the operation will be readily understood from the foregoing, and further description is deemed unnecessary.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In a type-writing machine, a paper-feeding mechanism comprising a rock-shaft provided with arms, a feed-roller at the forward ends of the arms, springs to press the arms toward the platen, a guide-plate also mounted on said shaft and secured in front thereof to said arms with its front edge adjacent to the space between the platen and feed-roll, and a paper-guiding scale also carried by the said arms and set vertically edgewise in front of the space between the feed-roll and platen.

2. In a type-writing machine, the combination with a platen-carrier having bearings in its ends below the platen, of a rock shaft mounted in said bearings and. provided with forwardly-projecting arms, a feed-roll in the outer ends of the arms, means for pressing to the platen and a paper-guidingscale held vertically edgewise at the front ends of said arms to hold the paper vertically to the platen, and provided at its ends with rearwardly-extending ears adj ustabl y mounted on said shaftarrns.

4. In a type-writing machine, the combinajecting arms, a feed-roller journaled in the ends of the arms with its shaft ends extending therethrough, means for pressing the roller toward the platen, a paper-guiding scaleheld vertically edgewise at the front ends of the arms and provided with rearwardly-projecting slotted ears through which the projecting ends of the roller-shaft pass and screws passing through said slotted ears into the arms.

5. In a type-writing machine the combination with a rock-shaft having forwardly-projecting arms, and a feed-roller journaled in the front ends of said. arms, of a guide-plate having integral ears punched out of its front edge and mounted on the rock-shaft, depend ing apertured ears at the forward corners of the guide-plate and screws passed through the arms into said ears.

6. In a type-writing machine, the combination with the platen-carrier having open-slot bearings in its ends below the platen-bearings, of a paper feeding and guiding mechanism, a rock-shaft on which said paper feeding and guiding mechanism is mounted; said shaft being removably held in said open-slot bearings, with its attached parts, transverse screws intersecting said open slots and longitudinal adjusting-screws mounted in the ends of the platen-carrier and engaging with their inner ends the ends of said rock-shaft.

'7. In a type-writing machine, the combination with a platen-carrier having end posts, bearings for the platen in the upper ends thereof, open-slot bearings below the platen-bearings, transverse screws intersecting the open slots, and longitudinal ad justing-screws extending through the posts into the ends of the bearings, of a rock-shaft removably mounted in said open-slot bearings with its ends in line with the longitudinal adjusting-screws, arms projecting from the rock-shaft, a feed-roll and paper-guiding scale at the outer ends of said arms.

ITS

8. In a type-writing machine, the paper- I forming said slots, and depending integral lugs g, at the front portions of the end edges of the plate for the purpose set forth.

9. In a type-writing machine, a paper-feed comprising a rock-shaft provided near its ends with pins, forwardly-projecting springpressed arms on the rock-shaft and having slots paper to the platen and having base-pieces extending under the carrier and having hooks at their forward edges engaging the front edge of the carrier and upwardly-extending fingers at their rear edges friotionally engaging the rear edge of the carrier to permit the paperholding fingers to be snapped or sprung on and off the platen-carrier.

11. In a paper-feeding mechanism the paperholding finger having a horizontal base provided with a hook at its forward edge to engage the front edge of a platen-carrier and an upturned friction holding-finger or lip at the rear edge to engage the rear edge of a platencarrier and permit the paper-holding finger to be snapped or sprung on and off its support.

In testimony whereof I afiix my signature in presence of two Witnesses.

, FRANK H. ARMSTRONG. Witnesses:

W. H. HARRIS, H. E GALLINGER.

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