US442028A

US442028A - Type-writing machine

Info

Publication number: US442028A
Authority: US
Publication date: 1890-12-02
Anticipated expiration: 1907-12-02

Description

(No Model.)

E. s. FIELD. TYPE WRITING MACHINE.

No. 442,028. Patented Dec. 2, 1890.

iniajil'ni UNITED STATES PATENT OFFICE.

EDWIN S. FIELD, OF SPRINGFIELD, MASSACHUSETTS.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 442,028, dated December 2, 1890.

Application filed February 1, 1890- Serial No. 338,868- (No model.)

To all whom it. may concern."

Be itknown that I, EDWIN S. FIELD, a citizen of the United States, residing at Springfield, in the county of'IIampden and State of Massachusetts, have invented new and useful Improvements in Type-Writing Machines, of which the following is a specification.

This invention in type-writers relates particularly to the construction of the carriages thereof and to parts or equipments for said carriages; and the invention consists in the construction and combination of parts, all substantially as will hereinafter more fully appear, and be set forth in the claims.

Reference is to be had to the accompanying drawings, in which is shown a part of the supporting'frame of a type-writer and the carriage supported and adapted to be guided thereon, Figure 1 being a perspective view; Fig. 2, a bottom plan view; and Fig. 3, a vertical cross sectional view taken on line 3 3, Fig. 2.

In the drawings,A represents the rear horizontal beam or rail of the stationary supporting-frame, and B, Fig. 3, the front rail of said frame.

0 represents the carriage-frame, of which a indicates the front rail, a co the transverse rails at the ends of the carriage, and l) represents the rear rail.

The construction of the carriage-frame may be readily seen on an inspection of the drawings, in which the preferred form of construction is shownthat is, to make the part a and ends a a of one piece of metal, the same being bent at the corners, as shown in Figs. 1 and 2, the set of the metal retaining said portions in the disposition shown, thus avoiding the difliculty heretofore experienced in making rigid and strong joints at the junction of the separated rails.

I prefer that the back I) of the carriageframe consist of a straight rod, as shown, the ends of which enter the sockets (Z in the extremities of the end sections a a, which end sections may be readily sprung open sufficiently to admit of the insertion of the ends of this rod into said sockets and as shown. Along forward of and parallel with the said rear rod Z) is another rod g, having a length equal to the proper distance between the inner faces of the sections a" a, and screws 71 pass through the said portions it a into the ends of the said rod g, confining the parts of the frame against springing movements.

To the rear rail 1) is secured in pivotal relations thereto the standards j, which have a guiding bearing and support upon the rear stationary rail A of the frame, and the said rod g serves as a pivot-rod, on which is mounted the curved longitudinal plate D,pro\'ided with the fingers m, which plate and fingers following quite closely the contour of the platen-roll at its lower and rear portion serve, inconnection with the other fingers E, carried on the front of the carriage-frame, to guide the paper, whereby it is always in its proper presentation for receiving the work to be performed bythe machine. The plate I) is pivotally mounted on the said rod g by having at its end upturned and apertured ear-pieces, as clearly shown in all the views, which apertured ear-pieces embrace said rod. The spiral springs 11, coiled around the rod g and each by one end having an engagement with the plate D and by its other with the end sections ct a, impart to the plate a springpressu re to sustain the fingers thereof against the under portion of the platen-roll. The springs Z Z between the ear-pieces on the'plate D and the end sections a of the carriageframe maintain said plate against any undue endwise movement. The said fingers E at the front of the carriage embody a construction whereby, while they possess all required strength, also have the much desired equable and elastic bearing for a greater length than ordinary. I therefore from the front rail of the carriage project the springs upwardly for quite a distance, as at 76, and then continuing same in an inwardly-returning bend a, following more or less the crosssectional curvature of the roll, I thereby give a greater extent of spring-surface and length and equability in the spring than would be obtained by the employment of a spring extending directly downwardly and inwardly from the front rail, as has heretofore usually been done when springs have been provided at all. It

will be noted that the pair of said springs 5 5 borne on the front rail, which are at the ends of the platen-roll, follow the contour of the roll quite closely and project alongside of and past the points of the end fingers (particularly indicated by G 6) of the said rear spring-pressed plate D, as may readily be done, for the extension of said end spring-fingers beyond or across the vertical plane coinci- 5 dent with the axis of the roll does not interfere with the impact of the type along the line of the roll, which is in the plane stated, for said type are arranged between the said end fingers 6 6. The other intermediate spring-fingers 7 7 at their terminal portions have their curvature so as to stand somewhat away from the periphery of the platen-roll toward its under and forward side, as seen in Fig. 3, and said intermediate fingers 7 7 are not extended 1 across the plane coincident with the type-impact line of said roll, and therefore, while said fingers are of much efliciency in their paper guiding and sustaining action, they present no obstruction to the striking of the type throughout the entire length of the roll which is to comprise a line of printing. By entering the paper straight and true at the rear of the carriage between the plate D and the roll the paper is by said plate and fingers guided forwardly and constrained to follow around the periphery of the roll, and when the forward portion of the paper has been advanced sufficiently far to be nipped between the roller and the extremities of the fingers m, on then merely turning the roll (through the thumbknob F) the paper is guided under the extremities of the said end fingers 5 5, maintaining the so-entered portions of the paper at the ends of the carriage closely upon the 5 roll, and the forward edge of the paper between the end fingers 5 5 is also held in such proximity to the roll that when further fed forward by turning the roll it will remain within the space between the points of the intermediate spring-fingers 7 7 and the roll,

and there will be no liability of the paper being guided astray or becoming caught or stuck in any part of the carriage, nor will there be any necessity of swinging up the 5 carriage to adjust the paper after it has once been properly directed and partially forced ,within the guiding and engaging parts, as described. In Fig. 3 the course of the inserted paper is indicated by the line as.

As well known, a common annoying incident ensuing in the use of typewriters as heretofore constructed is occasioned by the trouble and delay caused. by the irregular feeding and uncertain constraint of the paper in its proper course, and these objectionable features are overcome by the construction and combination orarrangement of parts described.

On reference to the drawings it will be seen that each spring-finger E at its terminal portion 19 is bent twice upon itself, whereby it.

is adapted to embrace the top, bottom, and outer side of the front rail a of the carriage, said embracing portion of the spring-finger having a certain amount of spring contraction, whereby its confinement on the rail is made close, the bearing being continuous throughout the entire surface of said embracing extremities, and the screws q securely hold said spring-fingers in their places. The journal-bearing for the roller G, which supports the front of the carriage from the forward rail B of the stationary frame, is formed by a single blank of sheet metal bent into an extended U shape adapted to embrace the front rail (1, and by its terminal and pending members to lie upon and against and to eX- tend below the said rail, whereby suitable parallel hangers are formed and in which the roller G may be journaled, all as shown in the drawings. A screw or rivet passing through the. opposing members of the hanger and through the rail CL insures the proper confinement of the one upon the other. It will be noted in Fig. 1 that the t'op of the hanger is of considerable extent longitudinally of the rail a, whereby in its bearing on said rail, when secured by the screw or rivet, no tilting or shifting movement of the hanger may be permitted.

IVhat I claim as my invention is- 1. In a type-writer, the combination, with the stationary supporting-frame and parts, as the standards j j, guided for movement on said frame and having affixed thereto the horizontal rod Z), of the platen-roll carriage consisting of thefront rail a and end sections a a, integrally formed of a single piece of suitable metal,the said end sections being provided with the sockets d d and adapted to be sprung into an engagement with said rod 19, substantially as and for the purposeset forth.

2. In a typewriter, the combination, with a rectangular frame having the platen-roll journaled thereon and the longitudinal rod g, of the plate D, having the turned-up earpieces at its ends and by which it is pivotally supported on said rod, and by its lower portion having a conformation corresponding to the adjacent surface of the roll, and provided with the series of adjustable fingers m, adapted to bear with a yielding pressure on the under side of said roll, the spiral springs ll, encircling said rod g and having an engagement with the carriage-frame and with said plate D, a series of spring-fingers secured on the front rail of the carriage and ex tended downwardly and inwardlytherefrom, the ones thereof coincident with the end of the roll extended under the surface thereof beyond the ends of said extensions m, and the intermediate fingers having their extremities slightly separated from the periphery of the roll and terminating a short distance below the said front rail and in advance of the type-impact line of the roll, substantially as and for the purposes described.

EDWIN S. FIELD.

Witnesses:

WM. S. BELLows, H. A. CHAPIN.