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Publication numberUS944624 A
Publication typeGrant
Publication dateDec 28, 1909
Filing dateAug 26, 1909
Priority dateAug 26, 1909
Publication numberUS 944624 A, US 944624A, US-A-944624, US944624 A, US944624A
InventorsJoseph Tigwell Lunn
Original AssigneeJoseph Tigwell Lunn
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Invalid's mattress.
US 944624 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented Dec.

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Patented Dec. 28, 1909.


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APPLICATION FILED AUG. 26. 1909. 944,624.


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Patented Dedf28, 1909.



.Patented Dec.28,1909.




Specification of Letters Batent.

Application led August 26, 1909. Serial N o. 514,732.

To @ZZ whom it may concern:

Be it known that I, JOSEPH TrGwELL L UNN, a subject of the King of Great Britain, residing at 127 Millbank street, Southampton, in the county of Hants, England, have invented new and useful Improvements in Invalids Mattresses, of which the following is a specification.

My invention embraces an invalids mattress constructed of a number of sections any one of .which may be independently manipulated so as to leave a space beneath that part of the patient requiring attention. Such mattress I construct of a flat bottom part of wood or other material adapted to it on to an ordinary bedstead or provided with legs to take the place thereof. This bottom part is provided with upright ends of suitable height between which are arranged a number of transverse box-sections some or all of which are removableand each is rovided with a separate padded overlay. *ach of such box-sections is slightly wedge shaped in plan, the top and bottom of each being parallel, and they are arranged with their ends alternately first on one side and the neXt on the other side of the mattress, the two end sections being wedge shaped on one side only as the other has to fit flush with the upright ends. This wedge like shape of the box-sections is adopted 1n order to facilitate the withdrawal of any particular section without friction or disturbing the invalid more than is absolutely necessary. Each of these removable box-sections is made in two box-shaped parts adapted to slide one on the other transversely of the mattress. The lower of each of these parts is formed with an inclined top so that the depth of such part increases from one side of the mattress to the other while the bottom of the upper part of the same section is similarly inclined. Each of such upper parts is fitted with a horizontal false bottom between which and a padded fabric or cloth covering to the box-section are arranged a suitable number of ordinary wire coil springs or any other form of spring as may be preferred by the user. lith such an arrangement it will be seen that any portion of the mattress may be easily removed so that the necessary attention may be given to the invalid, the bedclothes changed or the bed made, and in addition operations performed, wounds dressed or other surgical treatment applied to any portion of the body of the Patented Dec. 28, i909. i

tom part of the .mattress to engage with others on the bottom of each of the box-sections so that each of these latter will keep its proper relative position, while side iiaps may be hinged to thebottom at each side of the mattress so that they may be turned up and suitably secured and will then retain all the sections in proper position.

Instead of making the sections of wedgeshaped removable parts as above described,

they may, when preferred, be made of a vertically collapsible frame, preferably comprising a top part, padded and fitted with springs in the usual manner, a bottom part,

capable of being fitted on to or forming part l of the bedstead, and connecting parts by the aid of which the top part may be raised or lowered at will. In a simple form such connecting parts comprise end pieces hinged at their upper ends to the top of the frame and v having their lower ends resting on the lower part of the frame in suitable guideways. Along these guideways said lower ends of the end pieces may be caused to travel, each in an opposite direction, by a screw mounted on the frame bottom and cut with a right handed screw thread at one end and with a left handed screw thread at the opposite end. The two end pieces may thus be operated to cause their lower ends to approach or recede from one another so as to lower or lmay beA tapered at their sides to facilitate removal, or they may be all formed on a frame either separate from or constituting the bedstead bottom.

Separate sheets, blankets, waterproofs or other coverings may be employed with each part of the overlay when desired.

My invention will be better understood and more readily carried into practical effect by reference to the accompanying drawings by the aid of which I will now describe applications thereof.

Of these drawings, Figure l. is a side elevation of a mattress with wedge-shaped removable sections and Fig. 2. is a sectional end elevation through one of the box-sections, Fig. 3. is a plan and Fig. et. is an end elevation thereof respectively. Fig. 5. is a side elevation of a mattress with collapsible sections and Fig. 6, is an end elevation and Fig. 7 a plan (showing some of the sections removed) thereof respectively, whileFig. S is a side elevation, Fig. 9. an end elevation and Fig. 10. a plan of one of the sections detached.

As illustrated by Figs. 1. 2. 3. and 4. the mattress is constructed with a bottom part a adapted to it on to an ordinary bedstead and rovided with upright ends Z) and hinge side flaps. c fitted with fastenings c1 fVV anyV 'suitable type. On to this bottom fit a number of transverseboxf'sectionsf. Ywedge shapein plan, and each frmed of an upper part (Z and a lower part e: the former having the underside inclined and the latter its top correspondingly inclined as shown in Fig. 2. so that by the aid of suitable handles on the ends of` the parts the lower one may be first removed so that the upper one will drop down and may in its turn be removed.

The upper part Z of each section is formed with a horizontal false bottom f (Fig. 2.) between which and the top covering g are arranged wire springs 7L, while on the top of. this part fits an overlay Z: of correspond'- ing size and shape.

Suitable tongue and groove or like guides are provided on the underside of the upper parts Z and the tops and bottoms of the lower parts e so that the parts will retain their proper relative positions after the removal of one or more of them.

In the alternative method of construction shown by Figs. 5 to 10; the sections are each made collapsible and removable and co1n prise (Figs. 8. 9. and 10.) a top of woven wire, cloth or the like stretched on a frame Z in a similar manner to an ordinary wire spring mattress. This frame Z has hinged to it. in four pairs legs m to the lower ends ofwhich are pivoted plates n having journaled therein the spindles sup aorting rollers adapted to run on a bottom rame 0.V The corresponding legs onk the opposite sides of the frame are connected by cross bars 22 having central bosses through which passes a rod g mounted in the bottom frame 0. This rod is cut with a right handed screw thread at one end and with a left handed screw thread at the opposite end and the cen tral bosses of the two outside cross bars y) are correspondingly threaded, while the bosses of the two inside cross bars are bored with holes of a diameter sufficiently large to allow of their sliding on the unthreaded portion of the rod q. The outside leg of one pair is connected by a side rod fr to the inside leg of the other pair on the same side of the frame and vice versa so that each two legs so connected can only move in the same direction and those of each pair will consequently be caused to approach and recede when the rod is rotated in one or the other direction by the aid of a suitable handle s andthe frame Z so raised or lowered as shown in full and dotted lines Figs. S. and 9.

ll'hen preferred single rollers may be provided on the lower end of each leg instead of two as shown.

A number of collapsible sections so constructed, and provided with corresponding overlays, are arranged, as shown by Figs. 6'. and 7, transversely on an ordinary bedstead Tn this position they are 'supported on transversebars t. on which they can slide to permit of their withdrawal when col? lapsed, and Vthese transverse bars are in their turn supported on a frame carried by the bedstead. This frame is divided into a central portion u and two end portions 'al and u2, that end portion u1 at the foot of the bedstead being hinged directly to the central portion u, so that it may be lowered, and both it and the sections carried by it made of such size that they will pass between the sides and end of the bedstead, while the opposite end portion u2 is hinged through uprights 'v to the central portion u so that it may be raised. The portion u1 is normally supported at its free end by lugs w, resting on the bedstead side rails, but which may be turned inward out of engagement so as to allow the portion al to swing downward by its own weight into the position shown by dotted lines, when the gap created in the upper surface of the mattress may be filled by a suitably shaped cushion or otherwise as found convenient.

The two parts of each of the uprights v are hinged together at their upper ends and at their lower ends are hinged respectively to the central portion a and end portion a2 of the supporting frame so that they may be turned outward to permit of either of the i collapsible sections which they normally oyerlap being removed. Such uprights are, however, normally held in the upright position shown by buttons m on one of the sections.

' The raising of the portion u2 of the supporting frame and the collapsible sections on it as shown in dotted lines is effected by the aid of a screw threaded shaft g/ journaled in a suitable supporting frame and geared by bevel gearing to a transverse shaft fitted with a handle at its outer end by means of which the whole may be operated. This shaft y carries a block z connected by inclined connecting rods to the underside of the portion u2 of the supporting frame and the movementof which block along the shaft effects the raising or lowering of said portion u: of the supporting frame.

There preferred the collapsible sections may be used on an ordinary bedstead independently of any means for raising or lowering the end ones as above described and in this case the transverse supporting bars would rest directly on the side rails of the bedstead.

Having now particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is l. An invalids mattress comprising a plurality of sections forming the complete mattress, each section having an upper and lower portion movable in relation to each other.

2. An invalids mattress comprising a plurality of sections, each comprising a lower part and an upper part, a screw threaded rod carried by the lower part, and legs pivoted to the upper part and engaging with the screw threads of said rod.

3. An invalids mattress comprising a plu rality of sections, each having an upper and lower part, a screw threaded rod carried by the lower part, pairs of legs pivoted to the upper part, carriages secured to the bottom of the legs and engaging with the lower part, arms connecting the opposite carriages together, and nuts carried by said arms and engaging with the screw threads of the rod.`

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.


Witnesses CHAs. SMITH, H. D. JAMESON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7328055 *May 27, 2004Feb 5, 2008Marctec, LlcPatient support apparatus
Cooperative ClassificationA61G7/012