US429359A

US429359A - Type-writing machine

Info

Publication number: US429359A
Authority: US
Publication date: 1890-06-03
Anticipated expiration: 1907-06-03

Description

(No Model.) r 2 Sheets-Sheet, J. P. MOLAUGHLIN.

vTYPE WRITING MACHINE.

No. 429,359. Patented June 3, 1890.

fiTTEsT; lNXIENT-UP ens coy, mam-mm msmwrcn n c UNITED STATES PATENT OFFICE. 1

JAMES F. MCLAUGHLIN, OF PHILADELPHIA, PENNSYLVANIA.

TYPE-WRITING MACHIN E.

SPECIFICATION forming part of Letters Patent No. 429,359, dated June 3, 1890. Application filed November 18, 1887. Serial No. 255,464. (No model.)

To all whom it may concern.-

Be it known that I, JAMES F. MOLAUGHLIN, a citizen of the United States, residing at Philadelphia, in the'county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Type-Writing Machines; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to an electro-magnetic letter-spacing mechanism for an electrical type-writer, whereby the traveling carriageis advanced a letter-space after every impact of a type-letter upon the paper carried and fed by the paper-roll of said traveling carriage;

and my invention has for its object to provide an improvement upon the letter-spacing devices shown, described, and claimed in Letters Patent No. 367 ,650, granted to me on the 2d day of August, 1887.

My invention consists in certain details of construction, arrangement, and combination of parts and electrical connections, all of which will be more fully and accurately described hereinafter.

Referring to the accompanying drawings, Figure 1 is a vertical section through an electrical type-writer embodying my invention, showing parts in elevation and with parts removed. Fig. 2 is a detail view, partly in diagram and partly in plan, showing the arrangement of the letter-spacing circuit, the circuitcontrollers therefor, and the cooperating parts and electrical connections.

Like numerals of reference indicate like or similar parts in the/several views of the drawings. 7

Referring to the drawings by numbers, 1 designates the circular base of the instrument, made, preferably, of insulating material, and designed to support the several parts of the apparatus.

2 is asupplementary platform supported in an elevated position above the base 1 by the uprights 3 3, and is centrally reamed out or perforated, the edge of'said circular perforation being provided with a depending flange, as shown clearly in Fig. 1.

Above the platform 2 is arranged the non.- conducting ring 4, provided with the four laterally-projecting lugs 5 5, to which are secured the upper ends of the supportingstandards 6 6 by the screws 7 7, the said ring serving as a supporting-platform for the series of metallic segments 8 8, which in turn are rigidly secured upon the upper surface of said ring 4 at equal distances apart by the screws 9 9.

The type-levers 1O 10 are fulcru med in the adjustable supports 11 11, which latter are located at equal distances apart in a slotted supporting-ring 12, and are secured thereto by means of the nuts 13 13, and the said ring 12 is supported upon the supplementary platform 2 by standards 14 14 or a metallic framework'15. Each type-lever is connected by a suitable chain 16, or, rather, flexible connection, with the upper end of an elbow shaped armature 17, which is' pivoted above and in close proximity to an electro-magn'et 18, (see Fig. 1,) there being an electro-magnet and armature for each type-lever situated upon and insulated from the platform 2 of the instrument. The armatures 17 are mounted, near the electro-magnets 18, on adjustable supports 19, which correspond in construction to the type-lever supports 11, and project downward through suitable apertures around a peripheral flange 20 of the frame-work 15, being secured in place by nuts 21. Each electro-inagnet 18 is provided with a converted pole 22 (shown in Fig.1.)

, The circuit-closing key-levers 23one for each electro-magnet 18are pivoted at their rear extremities in an insulated boxing 24, and extend through suitable vertical slots in an apron 25, depending from the frame 2, and atthe outer ends each lever is provided with a suitable finger-key, on the face of which is a letter or symbol, the entire series forming a key-board similar in arrangement'to that of an ordinary type-writer. Each of the said key-levers is made of metal and is in circuit with an electro-magnet by a conductor 26, (see Fig. 1,) and engages when depressed a contact-point 27, which is secured upon the metallic plate 28, and is in circuit with the main battery 29 by a conductor 30. Each electro-magnet 18 is in circuit with a ring 31, by 'a conductor 31, which in turn is in circuit with a line. (Not shown.)

From the preceding description it will be understood that when a key-lever is depressed the circuit from the main battery 29 is established through the wire 30, plate 28, contact 27, key 23, and wire 26 to the respective electro-magnet 18, thereby energizing the latter and causing it to attract its armature 17, thus eliecting the impact of a type-lever againsta traveling paper-roll, (not shown,) and upon the break of a circuit caused by the release of the key the magnet is tie-energized and the type-lever falls to its normal position.

The ring 31 is secured by perforated insulating-clips 32 to the frame-work 15 of the machine.

33 designates a retractilo spring, (one for each key-leven) having one extremity attached to the key-lever and its other end suitably secured to some stationary portion of the apparatus, whereby the key-lever is restored to its normal position when released from pressure.

34: designates a spacing-magnet composed of three coils, which are supported upon atriangular yoke-piece 35. (See Fig. 2.) One pole of the magnet is in circuit with the series of type-lever supports 11 11 by means of the wires 36, and the other pole is in circuit with one pole of the battery 37 by wire 38, the other pole of said battery being electrically connected with the series of type-lever supports 11 11 by wire 39.

40 indicates the fram e-work supporting the several parts of the electro-magnetic step-bystep n1otor,-and 4C1 designates the pivoted supporting-bracket for the triangular-shaped armature 12, which also carries the springactuated pawl 43. A coiled retracting-spring (not shown) is attached at one end to the armature 42 and at its other to the frame 10 for the purpose of moving the armature and its attached pawl away from the poles of the magnet 34 when the latter are ale-energized, the play of said armature being limited by the adjusting-screw 14. It is not thought necessary to further describe the other parts of this step-by-step motor, since it will be readily understood that the attraction of the armature 12 serves as an actuating means for advancing a traveling carriage (not shown) one letter-space.

Referring to Fig. 2 of the drawings, it will be seen that each type-lever support 11 is insulated from the ring 12, and that the said type-lever supports are electrically connected in pairs by the metal strip 45; but it will be also observed that the respective type-levers of every pair of the electrically-connected supports 11 are each upon a different se ment 8. Thus it will be seen that the strips 45 and segments 8 serve as bridge-pieces between the alternate ends of the type-levers,

and the circuitfrom the battery 37 is 1101- mally closed through wire 39 to one of the type-lever supports 11, then through each segment 8 and pair of type-levers 1O 10 in series, thence by wire 36. magnet 34, and wire 38 to the battery. Consequently should any one type-lever 10 be raised from contact with its segment 8 by the movement of its actuatingarmature 17 the circuit through the spacingmagnet will be broken.

lhe operation of my invention is as follows: By the depression of any key-lever 23 23 (shown in Fig. 1) the circuit is closed through the respective electro-magn et 18, energizing the same, and causing the attraction of its armature,which movement effects the impact of the type-lever on the paper. (Not shown.) Now, the inst-ant the type-lever 10 is raised from contact with its segment 8 by the pull exerted upon the chain 16, the closed local circuit from the battery 37 (see Fig. 2) is broken, thereby de-energizing the spacingmagnet 3t and releasing its armature, which is withdrawn by its retractile spring. When the type-lever again falls into contact with the segment 8, the circuit is closed and the magnet 34 attracts its armature, thereby effecting the operation of the step-by-step motor to advance the carriage. Thus it will be understood that the spacer mechanism is controlled by the movement of the type-levers, and operates subsequent to the impact of the said type-lever on the paper.

Having now fully described my invention, I claim and desire to secure by Letters Patent 1. In an electrical type-writer, the combination of a series of type-levers and a series of metallic segments insulated from each other, and each supporting two type-levers in their normal position of rest, with a spacing electro-magnet in a charged electric circuit, including the type-levers and segments in series, whereby the spacing-magnet circuit is opened when a letter is being printed and is again closed when the type-lever returns to its normal position of rest, substantially as described.

2. In an electrical type-writer, the combination of a series of electrically-controlled type-levers and a series of metallic segments insulated from each other, and each supporting two type-levers in their normal position of rest, with a spacing electro-magnet in a charged electric circuit, including the type levers and segments in series, whereby the spacing-magnet circuit is opened when a letter is being printed and is again closed when the type-lever returns to its normal position of rest, substantially as described.

3. In an electrical type-writer, the combination of a series of electrically-actuated typelevers, key-levers controlling the same, and a series of metallic segments insulated from each other, and each supporting two type-levers in their normal position of rest, with a spacing electro-magnet in a charged electric circuit, including the type-levers and segvments in series, whereby the spacing-magnet In testimony whereof I afiix my signature in presence of two Witnesses.

J. F. MOLAUGHLIN. Witnesses:

THOS. J. HUNT, GEO. H. TIOI-IENOR.