US471092A - Type-writing machine - Google Patents

Description

(No Model.) V

T. BIGELOW.

' TYPE WRITING- MACHINE. No. 471,092. Patented Mar. 22, 1892.

WIN E55 25 WW. MM MM NITED' STATES PATENT OFFICE.

TIMOTHY BIGELOIV, OF BROOKLYN, NEW YORK.

TY PE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 471,092, dated March 22, 1892.

Application filed November 21, 1887. Renewed November 21, 1891. Serial No. 412,594- (No model.)

To all whom it may concern.-

Be it known that I, TIMOTHY BIGELOW, of the cit-y of Brooklyn, county of Kings, and State of New York, have invented a new and useful Improvement in Type- \Vriting Machines; and I do hereby declare that the following specification, taken in connection with the drawings annexed to and forming part of the same, furnishes a full and clear description of the invention, sufficient to enable those skilled in the art to which it pertains to make and operate the same.

My invention relates more especially to that class of type-writers in which the type are arranged upon the outer face of a wheel or segment thereof. A machine of this character is shown in the specification and drawings of Letters Patent No. 290,419, of December 18, 1883, commonly known as the Hammond type-writer.

The invention consists in the construction and combination of parts hereinafter described, and pointed out in the claims.

Figure I is a plan view of a portion of the type-case,showing myimprovements. Fig. II is a front elevation of the paper-shield. Fig. III is an end View of Fig. II. Fig. IV is a plan view of the inking-pad on an enlarged scale. Fig. Vis a transverse section of Fig. IV.

Only so much of the mechanism of the typewriting machine is shown in the drawings as is necessary to enable one acquainted with said machine to understand and apply my invention.

Similar letters of reference indicate corresponding parts in all the figures where they occur.

The inking cZem'ce.I will first describe the novel devices for inking the face of the type. 0 represents the type-wheel guard, and B the bracket which steadies the vertical shaft of the ribbon attachment in a type-writing machine of the description above referred to. Tie a type-segment swinging horizontally on the shaft D and bearing on its outer curved face the raised printing characters. L is the driving-lever which, operated by the keys of the machine through intervening mechanism,

swings the type-segment T to its operating position. P is the inking-pad, which is made of material adapted to hold printing-ink and feed it to the faoesof the type, as required.

Preferably a thick felt or woolen cloth is used with a short nap or pile forming its face, as shown in Fig. V, which may be produced either by teasing up the fibers or by drawing threads through in loops, which are afterward trimmed down, so that the face of the fabric resembles that of plush or velvet, the back or body, however, having a texture and thickness which adapt it to hold a considerable quantity of ink, while the pile aids in its distribution under slight pressure. The pad P moves laterally through an opening made for it in the vertical wall 0 of the type-wheel guard. It is attached to a holder P, (see Figs. IV and V,) and the holder is attached to a bow-spring I, one end of which is inserted into aslot in the pin 2', while the other end is loosely attached by means of a screw and slot to a support 1 which support is secured to the flange c of the type-wheel guard O by a screw passing through the slot vi in its horizontal limb. The support 2" thus affords opportunity to adjust the tension of the bow-spring I, which is so set that its normal action withdraws the pad P from the faces of the type far enough to allow the type-segment T to swing clear of the pad after it has applied the ink to the faces of the type. J is a bent lever, by means of which the inking-pad is applied to the face of the type. It is pivoted atj to the flange 0f the type-Wheel guard and has its power end j moved by contact with the l'inkl of the driving-lever. The opposite end of the lever J bears against and moves the pad through the medium of an adjusting-screw j, which is provided with alock-nut j. An inking-fountain K is attached to the upper rim of the type-wheel guard 0 just over the pad P, and is provided with wells k in 7a, discharging beneath, which feed ink to different parts of the pad, as required by consumption on the type. A pan Q is placed underneath the pad to catch anyink which may drip from the pad.

The improved paper-shieZd.A shield (shown separately at Fig. II) placed between the paper and the type limits the imprint made upon the paper to one letter at a time and excludes the paper from contact with the borders of neighboring type, thus securing the cleanness of the work. This shield consists of a thin blade or plate 0, extended and low at the points opposite said openings 0 o" as not to obstruct such inspection. The longitudinal openings 0 0 are made to extend to the outer edges of the vertical arms of the frame 0", so as to allow the freshly-printed characters on the paper to pass the arms without touching and smearing the print, and the vertical arms of the frame are recessed or indented, as shown at 0' 0" 0, for the same purpose. Both the openings 0 and o are useful in writing. It is frequently necessary to correct printed matter by erasure and filling in between other portions of the printed lines, and to do this properly accurate spacing and adjustment are required. The opening 0' to the rightof the hammer-opening permits this space to be seen and accurately gaged as it approaches the printing-point. The openlng 0' is of advantage in many other ways-as, for example, to permit inspection as the printing starts from a marginal line on the paper to give theproperindenfed spaceand also is especially valuable as the printing approaches the end of the line to enable the remaining space to be accurately estimated for the purpose of adjusting and spacing in a symmetrical and uniform manner the words and syllables required to fill itor to uniformly justify the matter and prevent the irregular appearance caused by lines of unequal length.

The operation of the inking device is as follows: hen akeyof themachineis depressed, the lever L moves in the direction shown by the arrow. This presses the linklagainst the pins 25 t and causes the type-segment T to swing horizontally on its shaft D, bringing the letter, the key of which has been struck, opposite the small opening 0 in the middle of the shield O. The end j of the bent lever J follows the movement of the link I, being caused to do so by the pressure of the spring I against the set-screwj at the other end of the lever. The pad I, following the spring I, to which it is attaehed,leaves the face of the type-segment T and permits the free movement of the inked typesegment toward the printing-point 0. On the return of the link Z to its position when at rest it strikes the end of the bent lever J and carries it in a direction the reverse of that indicated by the arrow. This causes the set-screw j at the other end of the bent lever J to press against the spring I and, overcoming its resistance, to force the pad P against the type, which have before the pressure is fully applied to the spring returned to their position of rest shown in the diagram. The set-screw 7 serves to adjust the pressure and time of the various steps of the operation.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, isp l. The combination, with a driving-lever and type'segment, of a spring-supported inking-pad and a lever operated by the drivinglever for causing the pad to press against the type.

2. The combination, with a driving-lever and type-segment, of an inking-pad,a spring upon which it is held, and alever operated by the driving-lever for pressing the pad upon the type.

3. The combination, with a driving-lever and type'segment, of an inking-pad and spring havingadjustment,substantiallyas described,

upon which the pad is supported, and a bent lever acting upon the back of the pad at one end and operated upon by the driving-lever at the other end.

4:. The combination, with a driving-lever and type-segment, of a spring-supported inkingpad having an ink feeding reservoir mounted above and a drip-pan beneath it, and a lever operated by the driving-lever for causing the pad to press upon the type, as set forth.

5. In a type-writer of the kind described, a

paper-shield constructed with recesses upon the vertical arms of the frame-work thereof, substantially as and for the purposes described.

G. In a typewriter of the kimtdescribed, a shield having in addition to an opening in the center 0 the longitudinal openings 0 0 at each side of said central opening, said shield being adapted to be placed between the type segment and the paper at the point where the imprint is to be made, as set forth.

'1. IBIGELOW. Witnesses:

B. E. VALENTINE, M. 0. ST. JOHN.

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