US1995059A - Typewriter cover and the like - Google Patents

Description

March 19, 1935. T. GRANGE TYPEWRITER COVER AND THE LIKE Filed Jan. 24, 1933 A ..m mm TG N X Em. o NwM Patented Mar. 19, 1935 UNITED S ATES PATENTOFFICE I r 1 95 059, I I I I x TrrE nIrER COVER AND THE LIKE 'lllu'aodose Grange, Paris, Francepassignor to Constructors Limited, Erdington, Birmingham, England, a company, of Great-Britain ApplicationfJanuary'24, 1- 9.33, Serial No, 653,262

. In' France January 29,1932

This invention has for object a new cover casing for typewriter machines of all sizes and makes when out-of service or when being transported and for use in lieu'fofthe separate rigid covers and linen and like covers usually employed hitherto.

Rigid covers are cumbersome and take up, in an omce, useful space unless used for an improvised purpose such as for the reception of correspondence, with the result that the typewriter frequently is no longer covered up at night and remains exposed to dust. As regards fabric covers or those made of imitation leather fabric they are very inconvenient to fit in place, unsightly, become readily torn and in no way protect the machine against shock. or knocks.

The invention consists essentially in a series of sectors or hoops pivotal about a transverse axis and fitting the one within the other behind and above the carriage of the machine, a simple pull on a knob provided for the purpose or the rotation of a milled head at the side being sufficient to cause the fan-like spreading out of the device so as to completely cover over the machine, said cover being locked at the front of the keyboard.

The accompanying drawing shows, a typewriter cover constructed according to the present invention and wherein:

Figure 1 is afront elevation of the cover in its closed }position; the covered typewriter being shown in dotted linesj Figure 2 is a sectional side elevation of the cover partly raised, the section being taken on the line IIII of Figure 1;

Figure 3 is a plan of the cover open and with a modification applied thereto;

Figure 4 is a section to a larger scale of one of the hubs, the section being taken on the line IVZV of Figure 2, but only the hub portions of the various parts being shown;

Figure 5 is a side elevation to a larger scale of the hub portions of three consecutive sectors.

The new protecting cover consists essentially of a series of cut out sections or crescentsand suitably shaped or curved to form fiat rectangular or rounded hoops 3 all turning about two common pivots 2 in order to come, or fit one within the other on the frame 1 of said machine or around it as shown, or they may be spread out fan-wise over the keyboard so as to cover and enclose the parts of the machine fully sheltering it from dust, giving at the same time the appearance of a half drum or a half sphere according to the shape given to the sections; The pivots 2 can be fitted anywhere conveniently on existing machines or in new machines cast during the -manufacture thereof or may be mounted on a separateframe orcasing 1 as shown, in whichthemachine is mounted. Milled knobs 4 are provided permit- 5 ting of easy manipulation of the cover in both directions while the last section is fitted with a lock 5 with safety catch automatically engaging at the front of the base of the frame or casing 1 to hold the=device closed and to maintain the 10 tension of the cover material, the lock 5 carrying a button or knob which can be used for opening the lock and for lifting the folding cover.

In typewriter machines the base or frame would be dimensioned so as to contain and hide away 15 at 6 the closed section in such a manner that the cover will take up no room. Finally said base might have lateral or front handles 7 to facilitate transport replacing those ordinarily fitted to rigid covers.

The sections forming thecover are made of any appropriate material which is sufficiently rigid, resistant, and thin such as sheet metal, aluminium, plastic materials, thin ply wood, fibre or may be of composite material or reinforced and so on. They may consist of half-hoops over which is stretched'a cover of leather or imitation leather. The last of the sections coming in contact with the front part of the base forward of the keys has a flange 12 ensuring tightness and covering the other sections when the cover is open.

The successive carrying along of the sliding elements 3 one by the other at the unfolding or folding up of the cover is effected by means of pins 14 provided on hubs 13 engaging in curved slots. 13 cut out in the hub 13 of the nextelement; the tightness between the sections 3 is ensured. by a small band of felt or velvet 15 glued as shown in Figs. 1 and 2 which also gives silent and gentle action, preventing one element from scratching the next. Such a circular hub 13 is provided on each side of the machine. The arrangement of the pins on each hub and the length of. the slots 13 are such that at the unfolding for covering over the machine, the finger 14 of the first'element commences to travel through the slot 13 of the second element; then abutting at the end of its stroke against the end of the slot 13 it carries along the second element. The finger carried on each of its two hubs by the second element acts similarly in regard to the third element and so on in sequence.

In the opposite direction the operation is identical, the first element commencing by closing inside the second and at that moment the two lateral fingers having travelled through their slots push back the second element which in its turn enters the third element and so on. Three hubs of consecutive elements are shown in Fig. 5.

Finally, in the case where the cover is not manipu ated: at its centre and where theelements are fairly long such as in large models for accounting machines, warping or jamming is prevented by fitting to the casing a driving arrangement arranged at both sides of the cover which causes the two lateral axes to turn evenly and simultaneously through the same angle. 7 This arrangement consists essentially in a transverse axis 16 connecting through pinion wheels 17, 18 to the two pivots 2. The pinion wheels 17 are fast with the hubs of the first or front sections. To avoid cumbersomeness the axis 16 is, in most types of machine, located at the rear of the machine as shown in Fig. 5, and carries the pinion wheels 18 connected by chains 19 oneach'side and driven by the wheels 17.' r I I claim: V 1. A cover for-typewriters and the like comof said hubs, said projection operably engaging the slots of said hubs for moving the sections in succession.

v 3. A cover for typewriters and the like comprising a series of telescoping sections pivotally mounted on a base, means for packing the edges of said sections'hubs on said sections, arcuate slots in said hubs, a lateral projection carried by one of said hubs, said projection operably engaging the slots of the remaining hubs for moving the sections in succession, a toothed pinion carried by thev end sections, an endless chain connecting said pinions, and. means for turning the pinion of the end section for operating the cover.

'rnnonosr: GRANGE.

Images