US2483843A - Framework for typewriters - Google Patents

Description

Get. 4-, 1949. PREZlOSQ 2,483,843

FRAMEWORK FOR TYPEWRITERS Filed Jan. 14, 1948 14 Giuseppe Prezioso Patented Oct. 4, 1949 UNITED STATES PATENT OFFICE FRAMEWORK FOR TYPEWRITERS Application January 14, 1948, Serial No. 2,242 In Switzerland October 10, 1947 1 Claim.

to a base of sheet iron in the form of a rigid frame, the plates being also connected together by cross bars.

It is in fact of great importance for the framework of a typewriter to be practically rigid so as to avoid the machine being put out of order during assembly or while being transported from the factory or while in use. It is to be observed that for shipment from the factory the typewriters are secured in their packing by attachments engaging with the framework thereof.

The present invention has for its subject a framework for a typewriter formed by two pairs of elements of sheet iron connected together rigidly and in plan forming a quadrilateral figure with right angles, the planes of maximum flexibility of the elements of one pair being located perpendicularly relatively to those of the elements of the other pair and each element being so shaped as to substantially prevent deformation in its plane of maximum flexibility.

A form of construction of the subject of the invention is shown by way of example in the accompanying drawing, wherein:

Fig. 1 is a perspective view.

Fig. 2 is an elevation.

Fig. 3 is a detail view to a larger scale.

With reference to the drawing, each plate 10, formed by a sheet of iron, is provided at its base with a part II folded at a right angle, which is adapted to enable it to be secured and which at the same time ensures the necessary rigidity of this part of the framework by practically opposing deformation of the plates in their planes of maximum flexibility.

The plates are also cut and bent so as to receive the cross bars (not shown), necessary for supporting the various members of the machine. In

this case, the cross bars are not provided or dimensioned for forming parts which are to ensure the rigidity of the framework. The cross bars are secured to the plates II] by means of lugs l1 and holes H3.

The two plates ID are secured rigidly by their base to transverse members I: of which one is located in proximity to the rear part and the other in proximity to the front part of each plate ID. The securing of the plates II] to the transverse members l2 may be eflfeoted for example by electric welding, screws or rivets, at at least two points [3 located on opposite sides of the central plane of each transverse member.

In the example described the transverse members 12 are formed by members of pressed sheet metal, having in cross-section the general shape of a U, as will be seen in Fig. 3.

This arrangement enables pieces of rubber l4, forming the feet of the machine, to be fitted into the two ends of each transverse member. The feet are secured in the transverse member by means of a plate I5 and a screw l6 passing through the bottom of the transverse member and the bent end I I of each plate l0.

As will be seen, the elements [0 and I2 of the framework form in plan a quadrilateral figure with right angles and the plane of maximum flexibility of the plates [0 is located perpendicularly relatively to that of the transverse members 12. The bent end H at the bottom of the plates l0 opposes their deformation in their plane of maximum flexibility and this also applies to the obliquely bent edges IQ of the transverse members in so far as these are concerned.

The framework thus formed forms a rigid and indefomnable assembly when the members of the machine are mounted therein. The framework is also very light in weight. The weight of the completed machine is further reduced by reason of the fact that the cross bars supporting the mechanism need not be so dimensioned as to ensure the rigidity of the framework.

By reason of the absolutely rigid connection between the transverse members l2 and the plates [0, no disarrangement of the machine is to be feared during the course of transport or use by reason of a deformation or a dislocation of the framework.

I claim:

A framework for a typewriter, comprising a pair of inverted channel shaped members, a pair of upright plates secured to said channel shaped members in spaced relation so as to form a rectangular structure, right angled portions at the lower ends and on the outer sides of said plates, securing lugs on said plates, and feet in the channel shaped members.

GIUSEPPE PREZIOSO.

REFERENCES CITED The following references are of record in the file of this patent:

243,293 Great Britain 19.25..

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