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KEYBOARD FOR TYPEWRITING MACHINES
Original Filed Jan. 25, 1924 3 Sheets-Sheet "2
UNITED STATES PATENT OFFICE.
OSKAR FISCHER, OP BERLIN-FRIEDENATT, GERMANY, ASSIGNOR TO N. V. MACHINA MAATSCHAPPIJ VOR HANDEL EN INDUSTRIE, OF AMSTERDAM, NETHERLANDS, A CORPORATION OF THE NETHERLANDS.
KEYBOARD FOR TYPEWRITING MACHINES.
Original application filed January 25, 1924, Serial No. 688,399, and in Germany November 4, 1918. Divided and this application filed April 10, 1925. Serial No. 22,060.
My invention relates to improvements in keyboards for typewriting machines, and the object of the improvements is to provide a keyboard in which the keys are arranged 6 relatively' to one another so as to facilitate blind writing and writing with all the fingers of each hand. Another object of the improvements is to provide a key board in which the keys may be readily removed 10 from the key levers. With these objects in view my invention consists in the matters to be described hereinafter and particularly pointed out in the appended claims.
For the purpose of explaining the inven15 tion an example embodying the same has been shown in the accompanying drawings in which the same reference characters have been used in all the views to indicate corresponding parts. In said drawings, 20 Fig. l} is an elevation of the keyboard,
Fig. 2, is a section taken on the line 2—2 of Fig. 1,
Fig. 3, is a horizontal section taken on the line 3—3 of Fig. 2 and showing the key 25 board and a part of the mechanism of the machine,
Fig. 4, is a detail view showing one of the space keys and the mechanism connected therewith,
30 Fig. 5, is a detail view showing a part of a key lever and the means for securing a key thereto,
Fig. 6, is a tdp plan view of Fig. 5, and Fig. 7, is an end view looking from the 35 left in Fig. 5.
In describing the invention it will be assumed that the keyboard is a part of the typewriting machine shown and described in my copending application for patent Ser. 40 No. 688,399, filed January 25, 1924, now Patent 1,553,765, dated September 15th, 1925, of which the present application is a division, and I shall make particular reference only to the keyboard proper, the mecha45 nism operated by the key levers being described in a general way. But I wish it to be understood that my invention is not limited to the use of the keyboard in the said machine.
50 As shown in the drawings the key board
, comprises type keys 1 to 5, 11 to 15, and 21
to 25, spacing keys 7, shift keys 8 and 9, and
tabulation keys 10. The keys 1-5, 11-15, 21-25, 7, 8 and 9 are removably secured to the key levers 10, 17, 18 and 19. As ap- 55 pears from Figs. 5 to 7 the keys are provided at their bottoms with slots by means of which they are fitted on the flat ends of the key levers. The front ends of the levers are formed with laterally projecting 60 tongues 26 provided by indentations of the levers. At the rear of the keys the levers carry tongues 27 providing stops for the keys when pushing the same on the levers.
The type keys 1-5, 11-15, 21-25 are ar- 65 ranged, as best seen in the plan view, Fig. 3, in two groups, symmetrically on opposite sides of the machine, and between the two groups of type keys, the shift keys 8 and 9, the tabulation keys 10, and the supplemen- 70 . tary keys 28 arc arranged.
For facilitating blind writing and writing with all the fingers of each hand, the type keys are disposed in several transverse rows one behind the other, and the keys of each 75 row are not disposed-along straight lines but they are displaced with relation to each other according to the relative lengths of the fingers, so that in the normal or natural positions of the hands each finger directly so bears on its key. The keys of the front or lowermost set are the following: The keys 1 designed for actuation by the thumbs of the right and left hands, the keys 2 for the forefingers, the keys 3 for the middle fingers, 85 the keys 4 for the ring fingers, and the keys 5 for the little fingers. The keys of the next sets are likewise disposed along curved lines, and the corresponding keys have received the characters 11, 12, 13, 14, 15 and 21, 22, 90 23, 24, 25 but the set of keys 11 to 15 are elevated relatively to thejkeys 1 to 5, and the keys 21 to 25 are elevated relatively to the keys 11 to 15. The space keys 7 are disposed lower than the first set of keys 1 to 5. 95 Therefore, when the fingers rest for example on the lower set of keys the thumbs feel the front faces of the keys 11 and the forefingers feel the sides of the said keys, which indicates that the fingers are in the correct Iqo positions. In the same way the ring fingers feel the side faces of the keys 15 of the next set. The space keys 7 and the shift keys 8 and 9 are so disposed as to permit opera