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Publication numberUS1200558 A
Publication typeGrant
Publication dateOct 10, 1916
Filing dateFeb 2, 1915
Priority dateFeb 2, 1915
Publication numberUS 1200558 A, US 1200558A, US-A-1200558, US1200558 A, US1200558A
InventorsElmer B Wilbur, Charles B Wilbur
Original AssigneeElmer B Wilbur, Charles B Wilbur
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Type-writer attachment.
US 1200558 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)


y APPLICATION FILED EEB. 2,1915-` 1,200,558. Patented 0@f..10,1916.

E. B. & C. B. WILBUR.



Patented 00E. 10, 1916.

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- E. B. 6L C. B. WILBUR.



Patented OCE. 10, 1916.

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Specication of Letters Patent.

Application led February 2, 1915. Serial No. 5,788.

T o all whomiit may concern Be it known that we, ELMER B. WTLBUR and CHARLES B. VVILBUR, citizens ot the United States of America, residing at Shenandoah, in. the county of Page and State of Iowa, have invented certainnew and useful Improvements in Type-Writer production of a simple and efiicient means for closing the electric circuit by lmeans of the typewriting keys, whereby the type-bars may be eiiciently operated.

With these and other objects in view this invention consistsl of certain novel combina# tions, constructions, and arrangements of parts as will be hereinafter fully described and claimed.

In the accompanying drawings z-Figure 1 is a vertical section through the machine, the carriage and operating mechanism merely being indicated for the purpose of conveniently showing the operation of the device. Fig. 2 is a top plan view oi' the keyboard of the machine. Fig. 3 is a section' taken on line 3-3, of Fig. 2.. Fig. 4 is a horizontal section taken on line of Fig. 1. Fig. 5 is a detail perspective of several of the type-bar actuating apertures.

Fig. 6 is a perspective view of the electromagnet supporting mechanism. Fig. 7 is an enlarged section taken on line 7-7, of Fig. 4. Fig. 8 is a detail perspective of'the type-bar actuating mechanism. Fig. 9 1s a detail perspective of one of the keys and" contacts therefor. Fig. 10 is an enlarged section taken on line 10-10, of Fig. 3. Fig. 11 is a detail perspective of one of the key retaining brackets or yokes.

By referring to the drawings it will be seen that 1 designates the body of the machine which supports the usual platen 2, which platenis actuated in the usual or any convenient manner to suit the convenience of the manufacturer of the typewriting machine. A type-bar supportin'g shaft 3 is supported upon the frame of the machine, and upon this shaft 3 are lpivotally supported the type-bars 4, which bars are of the usual construction and are provided with depending arms 5 for engaging the operating links 6. These links 6 are connected to one of the apertures 7 formed in the depending arm 5 of the type-bar 4 as clearly illustrated in detail in Fig. 8 by having its bifurcated end secured thereto by means of a pin 8. The rear end of each link 6 is connected to an armature 9. A plurality of these armatures 9 are supported upon a shaft 10 extending transversely of the machine, and each armature 9 is provided with an armature plate 11, which plate is adapted to be attracted by means of the cores 12 of the electro-magnets 13 to be hereinafter more fully described. A plurality of coil springs 14 are mounted upon the shaft 10 and have their free' ends engaging the armatures 9 for normally holding the same out of engagement with the electro-magnets 13 when said electro-magnets are denergized. The shaft 10 is supported upon a plurality of lsupporting brackets 15 as illustrated in detail in Fig. 5.

which may be arranged in any suitable ordesired manner are supported upon the spaced supporting rails 16 in a convenient manner to operate the respective armatures 9 carried by the shaft 10. 0f course, it Should be understood that each key and type-bar is operated by means of a ,separate magnet, and each type-bar 2 is also actuated by means of a separate' armature coperating with its respective magnet. These rails 16 are secured to the base of the machine by means of the laterally bent ears17.

A series of batteries 18 are supported upon the base of the machine 1 and are connected to the respective magnets 13 by means of the wires 19 as clearly illustrated in Fig. 1. A wire 20 also leads from the batteries 18 and is connected to the respective contacts 21 carried by the bridges 22.

A supporting frame 23 of insulating material is carried by the front yof the base 1 and 'is provided with a plurality of step portions 24 as clearly illustrated in Fig. 1 of the drawings. These step portions 24 are provided with a plurality of Contact mem- Patented Oct. 10, 1916. 'A

bers 25 which are connected to the respective magnets 13 by means of the conducting wires 26 as clearly illustrated in Fig. 1 of the drawings.

A spring metal or resilient key 27 is connected to each of the Contact points 25 and carries an indicating knob 28 at the outer end thereof, which knob may have printed thereon the letter which is adapted to be printed by means of. the type-bar coperating therewith. Of course, the letter may be removed from the knobs 28 if so desired when they machine is used for ,the touch system.

The bridge portions 22 of insulating material which support the contact members 21 are so arranged as to allow the spring keys 27 to readily form a contact with the contact portions 21 supported thereby. Each bridge portion 22 is provided with a plurality of spaced yokes 29 which are securely mounted upon the bridge portions 22 and straddle thespring keys 27 so as to limit the upward movement thereof, and also hold the keys against material lateral swinging movement. These yokes 29 are provided with a cushioning covering 30 so as to act as a resilient buffer for the keys. The inner end of each key 29 is ixedly secured to a contact point 25 as previouslydescribed and clearly illustrated in Fig. 1.

By carefully considering Figs. 7 and 10 the construction of the yokes 29 will be clearly understood as well as the construe tion of the contact members 21. Each contactl member 21 is provided with an enlarged contact head 31 having a depending shank to which is secured a thumb nut 32 for the purpose of facilitating the connection of the conducting wires 2O thereto.

It should be understood as will be obvious from the above description that the circuit may be closed through the magnets for energizing the same by theslightest pressure upon the spring keys 27, whereby the electrical contact will be closed and thereby facilitate the energization of the magnets 13. It should be understood that the magnets are connected up to the batteries and to the special contact points in such a manner as to cause the proper magnet to operate the proper armature 9 and in turn actuate thepro'per type-bar which is adapted to cooperate with the key which has been operated.

As stated above, it should be understood -that any suitable or convenient carriage mechanism may be employed in connection with the present invention without departing from lthe spirit of the invention, for the principal `object of the invention resides in the operating of the type-bar by means of the mechanism illustrated and described.

Of course, it should be understood that the device may be modified in its detail mechanical construction without departing from the spirit of the invention.

Having thus described the invention what is claimed as new, is

An electrically operated typewritin machine comprising a base, a supporting rame formed of insulating material carried by yokes carried by said bridges and over-A hanging said keys for limiting the upward movement thereof and also holding said keys against material lateral swing, and a cushion covering passing around said yokes 1for constituting a yieldable buffer for said reys. v

In testimony whereof we hereunto aifiX our signatures in presence of two witnesses.


Witnesses: l


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4592668 *Jul 20, 1984Jun 3, 1986American Can Co.Method for stamping indicia on materials
U.S. Classification400/364
Cooperative ClassificationB41J23/36