US1479621A - Magnetic typewriting machine - Google Patents

Description

,,ducting wires from contact points of key Patented Jan. 1, 1924.

UNITED STATES WASHINGTON FLETCHER NICHOLS, OF MUNFORDVILLE, KENTUCKY.

MAGNETIC TYPEWRI'I'ING TEACHINE.

I Application filed September 5, 1922. Serial No. 586,148.

To all whom it may concern:

Be it known that I, \Vasrnncroiv FLETCH- ER NICHOLS, a citizen of the United States, residing at Munfordville, in the county of Hart, State of Kentucky, have invented new and useful Improvements in Magnetic Typewriting Machines, of which the following is a specification.

This invention relates to improvements in typewriting machines and more particularly to key bars, type bars and intermediate or magnet bars, together with electrical connections associated with said key, type and magnet bars, in which an electric current from a battery or other electrogenerating device is so conducted that when a key bar of said machine is depressed a closed circuit is formed resulting in the magnetizing of an electromagnet mounted on the end of an intermediate or magnet bar which in turn is attracted to an adjacent soft iron, or control bar and by means of a connecting pitman attached to the distal end of a type bar actuates said type bar causing the proximal end or type end to ascend thru an arc to a platen above in the ordinary manner of type bars when actuated by finger pressure.

The objects of the improvement are, first,

to provide a typewriting machine in which the type bars are actuated by electro-magnetic force, thus relieving much of the stress of long hours of typing by finger vforce; second, to provide a typewriting machine in which intermediate or magnet bars are actuated by electromagnets mounted on the ends of said magnet bars, and which are connected by pitmen to the distal end of the type bars causing them to ascend to the platen as the magnet bar descends; third, to provide an open electric circuit which becomes a closed circuit as each successive key bar is pressed tocontact point provided below causing current from the battery or other electric generating device to pass thru said hey bar, thence from contact point thru insulated wires to an electromagnet mounted on the end of the magnet bar; fourth, to provide means by which said insulated con bars may be readily connected to any of the wires leading to the magnet coils on the ends of the magnet bars; as, for example, concting the wire from the A key bar to ma et on the end of the N magnet bar an vice versa. By this means illegible articles or cryptic messages ma; be written at the ordinary speed of the typist and after delivery may be as readily transposed or translated by means of another similar ma chine in which the same changes of electrical connections have been made as in the original machine: fifth, to provide an electromagnetic complex together with toy bars, magnet bars and type bars and such other modifications as are necessary to carry out the spirit of this invention, which may be adopted or applied to existing typewriting machines or embodied in an entirely new machine.

llhile the principles of this invention may assume a number of mechanical variations, one form o1 the invention is illustrated in the accompanying drawing.

The figure of the drawing represents a cross section of a typewriting machine looking from the right side of the machine toward the left. The improvements proposed for the machine and for which. Letters Patent are prayed in my petition are represented by the heavier unbroken lines and shading's of said drawings and shadings, the lighter dotted lines representing such outlines of-the machine as are necessary to show the relations of said improvements to the. whole machine.

A represents a full side view of a key bar; ll represents a cross section of a soft. iron control bar: C represents a full side view of a magnet bar; D represents a side view of a pitman between magnet bars and type bars; E represent a side view of a type bar; F represents an end view of the platen but for which no-claim for improvcn'ient is made; G represents a longitudinal section thru an L-shaped wire terminal and contact pointfor key bar; H represents a spiral spring by which key bars are returned to place; and J represents the spring to a magnet bar, all parts of which are described in detail and function of each part and of the whole set forth as follows:

A represents a key bar composed of a good conductor of electricity in which 1 is an ordinary typewriter key, bearing on its upper visible face its respective letter or other character and mounted on the key bar by hard rubber or some other insulating ma terial; 2 is a contact point on said key bar by which electrical contact is made with 5 by pressing down the key bar; 4 represents a cross section or end view of a small, cylindrical steel shaft upon which all the key bars are mounted so as to freely rotate thereon end make good electrical contact, but, which shaft is insulated from the rest oi the machine by hard rubber or other good insulating materiel; l3 represents a, cross sectional end vie-v1.01? 2 soft iron bar or control bar extending across the machine from the right to the left and curved in such'a manner as to form an are parallel to the type bar rest above and serving as an att-raction to magnets on magnet bars above; (7 represents a smell, strong'bar of aluminum or other non-magnetic substance known as the magnet oar mounted similarly to the key bars except that the magnet burs need not be insulnteci upon the end of each nnlgnct bar is mounted on electromagnet lel, which consists of soft iron core wound by e suffiicient amount of small copper to produce the necessary magnetic force for its purpose; the magnetic field of these electromognets must be well within the magnetic fie d of the soft iron bar, B; D represents at pitmun or small steel co nmecting bur connecting msmet bar to corresponding type bar in suci a way as to produce a constantly accelerating motion of the type bar as ii; ascends; 15 and 16 representthe smell pins by which the pitman is connected to the magnet bar and the type bar; E represents as type her not very different from the ordinary type bars, but made of some non-nmgnetic materiel and provided with above described connections thru pitrnen "l, with the magnet bar adjacent and pivoted at 17, so as to be freely movable by said pitman D, above described, and having on its proxi incl end the ordinary type found on type bars, 18; those type bars when at rest return to their common type bar rest, 19, which consists 01 a curved, plush covered rest made of non-magnetic material; F represents anordinnrytypewriter platen; G represents a longitudmel sections thru the hsheped, insulating nncl with which the contact point oi hey bar A is brought in contact by depressing the key 1. This connection 1s mode of good conducting," material and has a siip-in mortise for the connecting plug or lemon on the proximal end of wire 8, and is embedded in insulating materiel separating the several connections from each other and from the rest of "the machine; H. represents a small" coiled spring by which the key her is returned after each prcssion; this spring; *noust be insulated from the resents u similar spring to magnet her to re turn end with it the type bar after the rain cuit broken; 8 represents an insulnled copper wire or connecting cord from the terminal in the terminal 10 where it connected hy a small slip-in tench or other ccnvcnienlt!n ecesto ms double contact terminal from. which the wire El -12 do I rest 01 the machine; reprerncei before described,v must be fully insulated from each other and from the rest of the machine.

12 represents the insulated wire from con nection 11 to the magnet coil, 1 21 represents the return wire from the coil 14 to the common ground connection at 23; ground connection 23 is insulated from the rest of the machine but not from each other. 24 represents a common return wire from the common ground 23 to the battery; 20 represents the direct wire from the battery or other generating device to the key bar shaft l. 7

All parts of the typewriting machine not herein described remain essentially as they are now found in existing machines, except such modifications as are necessary to carry out the principles of this invention.

The operation of a typewriter in which these improvements are embodied may be described as follows:

Current from the battery or other generating device passes up thru wire 20 to shaft 4.

thence from shaft 4: thru each individual lrey bar Aand when said key bar is depressed to contact at 2-5, thence thru terminal G, thence thru wire 8 to connection 10, thence thru connection 11 endwire 12 to magnet coil 14, thence thru the w'indin s'of coil 14, forming an electromegnet o the core of said coil 14, thence by return by wire 21, to common ground connection 23 and finally returned by Wire 24. i

When coil 14: is charged and an electromagnct is formed of its core, it is attracted to fixed soft iron bar B, which is well within magnetic range of said magnets, thus actusting type bar E thru pitman D before described.

In this invention I claim:

1. In a typewriting machine, in combination "type bars, a movable magnet bar for each type bar and operatively connected to a" type bar to octuatesame, a magnet carried by each magnet bar, a control bar spaced from and located within the field of said magnet to cause attraction thereof when a, nmgnet is energized, means to energize any desired magnet,

2. .ln s typewriting machine, in combine tion type bars, a movable magnet bar for each type bar, s pitman operatively connecting a type bar with u magnet bar, a magnet carried by each magnet bar, a control bar spaced from and located within the hold of said magnet to cause attraction thereof when a magnet is energized, means to energize any desired ma at In a typewritilfg mac iiie, in combination type bars,a movable magnet bar for each type bar, a pitman operatively connecting each type bar with a magnet bar, a

magnet carried by each magnet bar, a control bar spaced ircm and within the field of said magnet to cause attraction thereof when a .magnet is energized, a key lever for each typeb'ar and magnet bar provided with a contact pointb means of which a closed circuit may be .ormed to energize a magnet ,on any desired ma et bar.

4. In a typewritmgmachine, incombination type bars arranged laterally in an are, a

movable magnet bar for each type'bar arran ed in a similar are, a pitman operative y connecting each type bar wltn a magneu our, amagnet carried by each ma net her arranged also in an arc correspon ing to the ma net bars a soft iron control bar a a b 7 I iornnng an, arc laterally corresponding to the are formed by. the magnet bars and magnets and spaced from and within the field cf said magnets to cause attraction each type bar and operatively connected to' a bar by a pitman to actuate same, a magnet carried by each bar, a conspaced from and located cause attraction energized, key on their v 4- v *s c. K t points ei- -ower rcrm; close ii; any desired magnet, insulated e from contact point of a l y lever a connecting point of similar wire to 2! within the v magnet and so constructed as to be readily connected to any desired magnet, an insulated wire to the winding of each magnet, a similar return wire from each magnet to a common return wire connection, an insulated metallic return wire connection which is provided with ready means of attaching the return wires from the magnets and the common return or ground wire, a key lever shaft which, is insulated from the body of the machine but makescontact with the key levers which are mounted on it and which is provided with ready attachment of the wire from the battery or such E. M. F. as may be used. v

6. A device in typewriting machines consisting of key bars, magnet bars, magnets, pitmen, soft iron control bar, type bars and type bar rest as described, also an electro:

magnetic complex by which said device is to be operated and consisting of .(1) an insulated wire or cord from the battery or other 'electrogenerating device to the key bar shaft to whichit is connected by 'a slip-in plug or some other convenient method, (2):the key bar shaft and key bars as before described (3') the wire from the key bar contact point to the magnet bar wire terminal to which it is-connected by a slip-in plug or such convenient means (4) the magnet bar wire to the coil on the end of the magnet bar (5) the electromagnet above named (6) a return wire from coils to common ground connection, and (7) a wire from common ground connection back to battery or other generating device, all wires should be fieXi-' hie, insulated and have an easy and eflicient method of connection, as a slip-in plug or tencn, at each end so as to be readily rcnewed or changed. WASHINGTON FLETCHER NICHOLS. Witnesses:

S'ramr Hour, H. F. MANSFIELD.

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