US1751761A - Type head for typewriters and the like - Google Patents

Description

A. RODRIAN March 25, 1930.

Filed De c. 16, 1927 Patented Mar. 25, 1930 UNITED STATES AliBERT noniamn, or

ro'rsnAM, GERMANY TYPE HEAD FOR TYPEWRITERS AND THE LIKE Application filed December 16, 1927, Serial No. 240,531, and in Germany March 24, 1927.

. My invention relates to improvements in type heads adapted to be mounted on type levers such as are used in typewriters. -The benefit of the invention is found in the oper- 5 ationin which the type head and lever to be connected are placed on a gauging apparatus, the correct relative position of the head and lever being insured by means of a mark such as a nose corresponding to a corresponding indentation provided on the gauging apparatus. In the method now in use the gauge mark is provided between pairs of types provided on the type head, the said mark being either in the form of a nose projecting from the head or of an indentation. I have "found that when providing a nose on the type head the said nose will produce an impression on the paper when using the type lever in the typewriting machine, because the 0 said nose is necessarily close to the types. When constructing the said mark in the form of an indentation it is difiicult to manufacture the die from which the ty es are made, for the reason that the portiori of the die forming the indentation prjects from the bottom of the diewhile the j igo'rtions forming the letters are sunk in the said bottom. Thus when cutting the die the steel block musthave a thickness such that a thickness corre- 5 sponding to the height of the projectingporwith amark'in the form of a projecting nose,

the said mark being spaced from the, type head so far that it does not spoil the. paper when printing. In the preferred embodiv ment my invention consists in providing the mark on a portion'of the type head which can I a be readily removed from the body thereof,

the said portion bein preferably reduced in thickness as compare to the body of the type head or separated therefrom by an indentation. In order that my invention be more clearly understood an apparatus suitable for putting my improved method into eifect has been shown in the accompanying drawing," in which Fig. 1 is a sectional elevation showing the gauging apparatus with a type lever and type head placed thereon, I

Fig. 2, is a top'plan view of Fig. 1, Fig. 3, is'a detail new on an enlarged scale and partly in section and showing the type' head and a part of the gauging apparatus, and g 5 Fig. 4, is asectional elevation taken on theline 4-4 of Fig.3. a L i In the example shown in the drawing the gauge apparatus comprises a gauge block 1 r in the form of a segment the dimensions of which correspond to the segment of the typewriting machine on which the type levers are mounted, and a gauge block 6 adapted to receive the type heads 7 in the proper osition relatively to the segmental gauge lock 1. The blocks 1 and 6 are fixed to a base plate 5 by means of screws Band 19, the relative posigons of the said parts being such that when fixing the type head 7 to the type lever 3 the types are in the correct position relatively to the-segment of the typewriting' machine and the printingpoint thereof. The levers '3 are {mounted on the block 1 in the" proper position by means ofa pivot bolt 4. urther, the block 1 is formed with an abutment 9- corresponding to a nose 10 formed on the lever 3, the obiect of the said abutment and nose being to hold the outer end of the I type lever the proper distanceaway from the top face of the block 6. Further, to the block 90 1' an arm 2 is fixed which is turned upwardly at its outer end, the said upwardly project= ing end being formed with a notch corresponding to a heel 11, formed on the outer end of the lever 3. Thus-the outer ends of the levers'placed on the block 1 are held in the proper position relatively ,to the block 6' i by the said arm.

As shown, the type head is formed with two types 15 and 16, and in addition it is 106 raised part of the bottom. Further, the block I 6 is formed with an indentation 23 corresponding to the nose 13. Thus, when placing the type head 7 on the block 6, the head is supported with its type 16 on the elevated portion 12 of the bottom of the recess 14 and with its nose 13 in the indentation of the block 6, and the distance between the indentation 23 and the pivot bolt 4 is such that the type head 7 placed on the block 6 is the roper distance away from the pivot bolt 4. t will be understood that in all the type heads to be adjustedby means of the gauging apparatus the distance between the nose 13 and the types 15 and 16 is exactly alike.

For fixing a type head 7 to the type lever" 3 the said lever is placed on theblock 1 so that the pivot bolt 4 passes through the bore of the lever 3 corresponding thereto,

and the nose 10 bears on the abutment 9.

The end of the type lever engages with the heel 11 in the notch of the arm 2 corresponding thereto. Thus the type lever '3 is exactly in the correct position. The type head 7 corresponding to the key lever 3 is placed on the block 6 with the nose 13 fitting in the indentation 23 and the type 16 hearing on the portion 12 of the bottom of the recess. Now the head 7 is soldered or otherwise fixed to the key lever 3.

The type head 7 is shaped in a die or matrix and this die or matrix is shaped by cutting with a fraising tool. If the positioning means employed for setting the type head 7 upon the gauge block 6 were in the form of a recess upon the type head and a nose upon the gauge block, positioning could not be effected with suflicient accuracy. The recesses in the die or matrix" in which the types 15 and 16 are themselves formed are cut by means of the tool alluded to, and this if, instead of a nose, the type head 7'were to'be" provided with a recess, as its element of the positioning means, the die or matrix-would have to be formed with a corresponding projection, and such projection upon the face of the die or matrix would have-to 'be formed -by a tool adjusted in a difierent manner,

and the positioning of the projection relameans which the type head 7 carries must,

therefore, be a projection, as the type also which the type head. carries are projections. Otherwise, accuracy of spacing as between the type themselves and the positioning means is impossible of accomplishment. A difliculty, however, remains; as already stated, it is objectionable that the type head carry as its element of the positioning means a projection, for the projection being present is liable to make unsightly marking upon the paper when the type head is in service. My invention then involves further the formation of this projecting element or nose upon a deciduous extension of the type head, and, after the positioning means have served their purpose,.this extension is cut away.

Thus the desired accuracy is achieved without prejudice to the utility of the finished article. i i

As appears from Fig. 2, the segment 1 is formed with a series of slots 22 each adapted to receive a key' lever.

After thetype head has been fixed to the key 3 the heel 8 is removed therefrom by means of a pair of tongues, by grinding, or by other methods. v

In the example shown in the figures a gauging apparatus independent of the typewriting machine is provided for fixing the type heads to the type levers. But I wish it to be understood that'I do not limit myself to thisfeature, and that in some cases the segment 1 is taken from the typewriting ma chine to be provided with the tiygpe levers, so that a separate segmental bloc 1 may be dispensed with.- Further, the operation of adjusting the type heads and fixing the same to the type levers may be performed on the typewritlng machine itself, in which case a gau e block such as 6 is temporarlly fixed to the typewriting machine in. the proper position relatively to the segmenthaving the type levers pivotally mounted thereon.

Iclaim: g

1. A type-head, adapted for assembly in properly gauged space relationship with a type-lever, said type-head consistm body provided with a pluralityof pro ectlng types and provided further with the projecting element of a projection-and-recess alignment device, such member belng ar ranged beyond the area included byand between said types and being accurately spaced with respect to said types.

2. A type-head, adapted for assembly 1n properly gauged space relationship w1th a type-lever, said type-head consisting of a body provided with projecting-type and provided further with a removable lateral extension, such lateral extension bearing a pronose accurately spaced with respect type and adapted to engage a corresponding recess in a carrier.

3. In apparatus for adjusting type-heads on type-levers, acarrier equipped at one end with positiomng means adapted to be 'en gaged by the type-lever and at the other end with a seat upon which the type-head, may

- be adjusted to tion to effect accurate placement of the type:

head on such seat.

' 'In testimony. whereof I hereunto aifix my signature. I

ALBERT RODRIAN.

adjacent such seat, and be-

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