Air-conditioned mattress
United States Patent 2462984

This invention relates to an air conditioned mattress, the words air conditioned meaning, as they do in the air conditioning art, an artificial condition of air with respect to temperature and sometimes humidity. An object of the invention is to make artificial temperatures available to the...

Maddison, Horace P.
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Maddison, Horace P.
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US Patent References:
2059226Air conditioned cushion1936-11-03
1936960Health mattress1933-11-28
1489308Air-cooled seat cushion for automobiles1924-04-08

Foreign References:

This invention relates to an air conditioned mattress, the words air conditioned meaning, as they do in the air conditioning art, an artificial condition of air with respect to temperature and sometimes humidity.

An object of the invention is to make artificial temperatures available to the occupants of hospitals, particularly in the wards of such institutions where adjoining beds may require different conditions for their occupants. It is at once available to furnish the occupant of a bed, equipped with this invention, with an artificial body temperature, either all over the whole body or embracing a selected bodily area, considerably above or markedly below that of the air which he breathes directly from the room.

It is a still further object to furnish a cool temperature of the nature of an ice-pack for a local area of a person's body, or for other conditions to furnish the equivalent of hot applications, and in neither case, as will be apparent, to require anything like the close nursing attendance as by the old way of doing it.

It is also apparent that with an air conditioned mattress, anyone, whether ill or not, may have an artificial and more comfortable resting temperature produced by a relatively small apparatus, when to recondition the air of a large room or perhaps a tent will be impossible, wasteful or ineffective. By conditioned is meant made suitable, such as warmed, cooled, humidified, filtered, or the like.

The objects stated are satisfied by the structure illustrated in the accompanying drawings, which are diagrammatic to the extent that porous surfaces that are so because of a large number of air passageway holes therethrough, have only a few holes shown, as repeating them would not serve to make the disclosure any clearer.

In the drawings: Fig. 1 is a plan view of a mattress, with parts removed, equipped with an air permeable top, of which a selected area may be left air permeable, or in some cases more than one area, the balance of the top being sealed off from the artificially tempered air as will be explained; Fig. 2 is an enlarged elevation of a corner of Fig. 1 shown partly sectioned; Fig. 3 is a perspective view of the mattress of the invention with the tempered air localizing means removed and the top foraminous cover not shown; and Fig. 4 is an enlarged partly sectioned view of the corner portion of Fig. 3.

Further describing the drawings, the mattress will have a substantially airtight bottom member, to be generally flexible. The sides 2 will also be impervious to air under the pressures contemplated herein as will, preferably, be a marginal area such as 3 all around the upper or top area.

Inside of this last named area will be a foraminous sheet or top securely attached to the inner boundaries of the elements 3, and identified by numeral 4. Where this element shows through a hole in 10 and II, it is given the identifying numeral 4'. For convenience, a bead 5 will surround the upper boundary of the mattress and for appearance's sake, another bead is shown around the bottom surface boundary. r There are several flexible plastics available that are very tough, will stand perforation by hollow punches without e t e nraverTab i rics and are in general very suitable for bottom, top or side of the mattress of the invention. Internally, the mattress will be divided into two parts, an upper part comprising a resilient cushion portion 8'" ^ eath which is a strong f porous support sheet 8,. A wide choice of cushion material that is ss6Wning and highly air permeable is available. A rubberized fiber such as that now used as pilot seats in airplanes is highly desirable. The cushion and the support sheet will be supported on the bottom I by an assembly 30 of coil springs as shown at 9 and the balance of the space between the support sheet 8 and the bottom I serves as air pressure equalizing space, which must be proportionately large to get even distribution of conditioned air trough the sheet 4, which is a prime requisite.

Superposed on the foram ous sheet 4' in Figures 1 and 2 are strips of ough flexible material and again the syntheti plastic which is much tougher and stronger than most fabrics is suggested. These strips are crosswise strips such as 10, which lie side by side and cover the whole area of the sheet 4', and superposed on these crosswise strips 10 will be longitudinal strips II. Each crosswise strip 10 and each lengthwise strip 1 is independently movable and each is provided with a desirable number of holes, and when the longitudinal strips and the cross strips are all in the same portion, that is, when uniformly pulled to a predetermined bead 5, both sets of holes are in registry and permit conditioned air to pass through from the inner parts of the mattress.

Each strip, 10 or II, is furnished with a handle as diagrammatically shown at 12 and 15, preferably so placed and formed that it s serves also as a limit stop, as shown in Fig. 1. It is not intended to indicate difference in structure by different numerals, 12 and 15.

For example, let it be assumed that when all of the handles 12 which serve to move the cross strips 10 lie close to the bead, as shown in the top of Fig. 1 (except one) and the handles 13, which control the longitudinal strips 11 likewise lie close to the bead, all of the holes are out of registry and no substantial quantity of air can pass through from the inside of the mattress since quite low air pressures will be necessary.

Contrariwise, when all of the handles on the opposite end and side (which will be deemed present though not drawn) are pulled, all of the holes in both strips will be in registry and the capacity of the mattress top to emit conditioned air will be undiminished by the strips. When handles further identified as a and b have been pulled, the hole marked c will be open clear through and a local area can emit air that is entirely different in quality from the rest of the mattress top. It is at once seen that these strips must be punched so that spaces or lands between holes are slightly greater in their smallest dimension than the diameter of the holes and that it is only necessary to move the handles 15 about the width of the holes to open or close the latter for a very wide selection of active or inactive areas. Conditioned air will be furnished to the mattress by a machine controllable to produce the required temperature and these are so well known that it has not been thought necessary to indicate more than a conAli+ crnn1h o 9a f wrlhir'h will in eOch n-co ho rosumed to form a connection with the necessary air moving equipment to furnish heated or cooled air as required. The foregoing described structure will satisfy the objects of the invention in a satisfactory manner, which is largely made possible by new materials not heretofore available, but which were developed for widely divergent purposes.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is: 1. An air conditioning mattress comprising a mattress having a space therein that is substantially co-extensive with the top area of the mattress, an air permeable top area of said mattress, means for supplying conditioned air to the interior of the mattress and means superposed on the permeable top which are selectively movable to open less than the whole area of the top to air emission from the mattress interior while closing the remainder of said area.

2. A mattress having dense walled bottom and side and end vertical walls, with a porous top member, a spring supported cushion defining an inner enclosed space above the bottom, an air supply means connected to the space thus provided and two sets of movable slide strips, each set comprising a plurality of side by side perforated material, one set normal to the other set and superposed in contact therewith, characterized by the strips of each set being independently movable to bring the perforations thereof into or out of registry with the perforations of the immediately adjacent set, to pass air from said supply means through a selected area of the top of the mattress.

3. The combination as claimed in claim 2 and including limit stop means on each strip, at each end thereof, effective to determine its position with respect to registry of perforations.

4. The combination as claimed in claim 2 and including means movable according to a definite mode of operation to leave a selected area of the top of the mattress air permeable to emit conditioned air from the mattress interior, while at the same time shutting off all other areas.

5. A mattress comprising a body with substantially air impermeable bottom, sides, ends and a margin around the top surface thereof to define an inner rectangular area generally filled with porous resilient material, a porous cover made rigid with the said margin to close the top, a plurality of perforated cross strips and a plurality of perforated longitudinal strips, one sort superposed on the other, positioned between the porous cover and the resilient material, the said strips longitudinally shiftable to bring the perforations into registry under the whole or a part only of said porous cover and means for admitting air under pressure beneath the strips.


40 REFERENCES CITED The following references are of record in the file of this patent: UNITED STATES PATENTS 45 Number 560,613 597,058 1,489,308 1,936,960 50 2,059,226 Number 75,885 55 249,760 429,326 Name Date Forsberg ---------_ May 19, 1896 Forsberg ---------- Jan. 11, 1898 Cox -------------- Apr. 8, 1924 Bowman --------- Nov. 28, 1933 Gates ------------ Nov. 3, 1936 FOREIGN PATENTS Country Date Germany --------- June 23, 1894 Great Britain ------ Apr. 1, 1926 France ------------ July 13, 1911 U^" 2& _ e j I