US1484720A - Combined chair and stepladder - Google Patents

Description

Feb, 26 E924. L44fi2 P. KOBYLANSK! COMBINED CHAIR AND STEPLADDER Filed July 5, 1925 Fatented Feb. 26, 192%.

PETER KOIBYLANSKI, or HAMILTON, onrnnro, onnnne.

COMBINED CHAIR Ann s'rnrnannnn.

-App1ication' filed Jul 's, 1923. Serial No. 649,646.

To all whom it may concern. 7

Be it known that PETER KoBYLANsKr, a

citizen of Ukrainia, residing at Hamilton, in thecounty of WVentworth and Province of Ontario, Canada, has invented certain new and useful Improvements in a Combined Chair and Stepladder,of which the following is a specification. I

My invention relates to a combination in chair and step-ladder, and consists'essentially of a chair, the backof which is linked to the seat structure and. capable. of being elevated to a suitable height comparable with that of a domestic step-ladder and provided with rungs serving the combined purpose of steps and back-rest, and chair arms pivoted to the forward chair legs and to the movable back which serve as struts for the back when the latter is elevated.

The principal object of the invention is to provide means for converting a chair into a household step-ladder, so that two important household necessities are combined in one unit.

A further object is to provide a step-ladder which is combined with an ordinary article of household furniture, so that the former is always at hand when required, as it is customary with ordinary separate step-ladso ders to store them in some remote portion of the dwelling, such as the basement or attic.

A still further object is to provide means for the centre of gravity to fall between the forward and rear chair legs so that the as weight of the person occupying the stepladder will not overbalance the structure.

Another object is to provide means for effecting rigidity to the structure when the chair back is elevated to form the stepao ladder.

Still another object is to provide a device of the class specified which will be simple, durable, efficient, and inexpensive to manu facture.

These, together with other objects may be attained by the combination, construction, and arrangement of the parts as will be hereinafter more fully described, illustrated in the accompanying drawing, and pointed w out in the claim hereunto appended.

Referring to the drawing:

Figure 1 is a side elevation of the invention showing the device in chair form, in step-ladder form in dotted lines, and in stage 5 of being converted, also in dotted lines.

Figure 2 is a perspective view showing the step-ladder form;

Figure 3 is an enlarged detailed perspective view of the back raising parts; and,

Figure 4. is an enlarged detailed perspective view of the opposite side of the device showing the back raising parts and the hinged braces for rigidly holding the back in'elevated position.

Similar reference characters refer to similar'parts throughout the several views.

The chair is formed of the usual front legs 2 which extend upwardly as arm supporting columns 8, rear legs 4; seat structure comprising front rail 5, rear rail 6 and lateral rails 7; and rungs 8. These members form a unit and are constructed each rigid with the other. The chair back comprises side uprights 9 connected by a plurality of horizontal rungs or steps 10 spaced at a suitable distance and comparable with the steps or rungs of an ordinary ladder. The uprights 9 are pivotally connected at their lower end parts to links 11 at 12, whose opposite ends are pivoted to the end parts of the rear rail 6 at 13.

Arms or brackets 14: are pivotally connected to the upper ends of the columns 3 at 15,

and at their opposite ends are pivotally connected to the uprights 9 at 16.

Ihe chair back comprised of the uprights 9 and rungs 10 may be elevated or lowered, as illustrated in diagram in Figure 1, by rotating the links 11 on the pivots 12, so that the latter assume an upright or depending position as the case may be. It will be noticed that the arms or brackets 14 are substantially longer than the lateral rails 7 thus effecting a rearward acclivity to the chair back comparable to that of an ordinary arm or easy chair, and that said arms are horizontal or parallel with the chair rails when the chair back is in normal position.

When the chair back is elevated, as shown in Figure 2, the arms 14 move upwardly at their rear ends and serve as brackets or struts for the support of the back which when so elevated assumes a position having a forward acclivity.

There are provided for further support of the back when it is elevated, a pair of folding arms 17 secured by hinges 18 to the top of the rear rail 6. When the structure is in normal position, as shown in Figures 1 and 3, these folding arms are in parallel relation with rail 6, as shown in the said figures, and when the back; is elevated ,to form a step-ladder, the folding arms I'Kaiie swung to a vertical position, as viewed from the front or rear, and engage flanges 19 on the uprights 9, thus aflo-rding rigidity be tween the relative parts. When theback is elevated, the limited length, of the arms effeet a forward acclivity. thereto,.so that the centre of gravity is intermediate of the for- Ward and rear legs of the structure. Inthis manner the structure is prevented from overbalancing with the weight of the person occupying it when used as a step-ladder.

There has thus been provided a simple and efficient device of the character described and for the purpose specified. v

Having now fully described the invenk. tion, what I claim and desire to secure by Letters Patent, is; V 7 I In a device of the class described, a strucs ture comprising seat rails and chair legs, and

meepao chair arm supports forming part of the forward legs, ,linkspivotally connected to the endswofwthe rearseat rail; aback structure comprising lateral uprights connected by spaced combined back supports and ladder rungs, said uprights having pivotal connection with the free, ends of said links, com bined chair was and back supporting struts pivotally coimected,to said chair arm supports and to said lateral uprights, and folding arms hingedlysecured-to the-top of the rear. seat rail: adapted to, lie parallel therewith'twhen the back structure. is: in normal position,;aiid .to he swung vertically to engage flanges on-the, said-.uprightslwhen the back structure is in elevated position. V,

In testimony whereof I have afiixed my signature. x.-

I PETER KOBYLANSKI. Witnesses: w: t a

LL DQEARLE, I L. A WALLER.

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