Drinking tumbler

July 31, 1934. b. o. reuther 1,968,263

DRINKING TUMBLER

Filed Dec. 8, 1932

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Patented July 31, 1934

1,968,263

UNITED STATES PATENT OFFICE

1,968,263

DRINKING TUMBLER

Bernard O. Reuther, Buffalo, N. Y., assignor to Minnie F. Steele and Edna S. Reuther, Buffalo, N. Y.

Application December 8, 1932, Serial No. 646,345 (Cl. 65—66) the goblet type, the double wall portion thereof being shown in section.

Fig. 2 is a vertical section of a drinking tumbler showing the double wall construction.

Fig. 3 is a fragmentary vertical section of the eo goblet shown in Fig. 1 with another form of drinking edge.

Fig. 4 is a fragmentary vertical section of tne tumbler shown in Fig. 2 with another form of drinking edge. 65

The drinking tumbler indicated generally at 1, in Fig. 1, is formed of glass, china or any other suitable composition and is provided with a base 2, stem portion 3 and bowl portion 4. The bowl portion 4 has the inner wall 5 and outer wall 6 70 which are united at the top in a continuous rolled drinking edge 7. The outer wall 6 may either be an integral continuation of the stem 3 as shown in Fig. 1 or the bowl may be formed separately from the stem, in which case the outer wall 6 75 would be cemented or otherwise rigidly attached to the stem substantially at 8.

Space 9 is formed between the walls 5 and 6 and in the process of manufacture, the air is withdrawn to a greater or lesser degree from 80 space 9, thus forming a rarefied space between the inner and outer walls. The presence of rarefied space 9 between walls 5 and 6 serves as an extremely efficient non-conductor of heat and will prevent the condensation of moisture on 35 the exterior of wall 6 when the bowl contains a liquid having a lower temperature than the surrounding atmosphere, the wall 5 will remain .substantially at the temperature of the liquid and wall 6 substantially at the temperature of the’ 00 atmosphere.

In another form of the invention, it is recognized that the air in space 9 need not be withdrawn and that space 9 may be hermetically sealed to prevent any contact of the air in space 95 9 directly with atmospheric air and that the hermetically sealed air space will be a sufficient nonconductor of heat to prevent the condensation of moisture on the exterior of wall 6 particularly when the difference in temperature between 100 the liquid in the bowl and the atmosphere is not great. In tumblers in which the walls are extremely thin, it is desirable to reinforce them by a web member 6α, formed between the two walls. 105

The tumbler shown in Fig. 2 is of ordinary shape and is provided with the double walls 5 and 6, the walls also forming a double walled base, wall 6 having portion 10 which serves as the supporting base of the tumbler. In Fig. 2, three HO

Claims.

This invention relates to a drinking tumbler and more particularly to a drinking tumbler provided with double walls, the space between the inner and outer walls having the air exhausted S therefrom to a greater or lesser degree thus'forming a rarefied gas between the double walls, to prevent the deposit or precipitation of condensed moisture on the exterior of the tumbler.

The ordinary conventional drinking tumbler is 10 formed with a single wall and in the ordinary course of usage is partially filled with an iced liquid, or liquid having a temperature that is substantially below the temperature of the surrounding atmosphere. The reduced temperature of 15 the liquid is readily conducted by the wall of the tumbler and there is a tendency caused by the contact of the exterior side of the chilled tumbler wall with the atmosphere to condense moisture from the atmosphere upon the exterior side 20 of the tumbler wall and an accumulation of condensed moisture being formed in sufficient quantity the moisture will run down the exterior side of the tumbler wall and onto the tumbler support. This action is especially noticeable in the 25 warmer seasons when the atmosphere is very humid and the difference in temperature between the atmosphere and liquid is great, and has made necessary the use of mats or coasters beneath tumblers in order to absorb or catch the con30 densate and prevent the discoloring of table covers or surfaces.

The present invention has for its primary object to provide a drinking tumbler which will prevent the condensation of moisture on its ex35 terior when it contains a liquid having a temperature below that of the surrounding atmosphere and therefore eliminate the necessity of using mats or coasters.

A further object is to provide an improved 40 drinking tumbler having double walls and a rarefied air space between the inner and outer walls.

Still further objects of the invention are to provide a double walled drinking tumbler having ⁴⁵ a hermetically sealed air space between the inner and outer walls; to provide a double walled drinking tumbler of reinforced construction; to provide a double walled drinking tumbler with a suitable fine drinking edge and other objects and ⁵⁰ details of construction will be more particularly pointed out in the following description and set forth in the claims.

In the drawing:

₆g Fig. 1 is a side view of a drinking tumbler of ί, 968,268 reinforcing webs 11, 12 and 13 between the double walls are shown and in this construction separate spacer members can also be used in place of the integral webs 11, 12 and 13.

b Figs. 3 and 4 show tumblers having a different form of drinking edge. It is desirable in a high grade tumbler to have thin light materials and especially to have a delicate thin drinking edge. In the usual course of filling a tumbler with 10 liquid, it is only filled partially and an appreciable space in the top remains unfilled. This customary partial filling renders it possible to move the tumbler or tilt it to one’s lips without splashing the liquid over the side. In the .15 tumblers shown in Figs. 4 and 5 the walls 5 and 6 are joined at 14, which is a point above the usual height of the level of the liquid contained in a tumbler when the tumbler is in a horizontal position, and an attenuated drinking edge is 20 formed, the inner side of which is beveled to terminate in the narrow lip 15. In this form of the invention it will be seen that space 9 extends to a greater height than the level of the liquid and prevents the condensation of moisture on 25 the exterior of the glass, and that the drinking edge may be of substantially less thickness than the thickness of the double wall and intervening space.

In another form of the invention, the air con30 fined between the spaced walls of the tumbler is carefully dried and kept in a substantially dry condition during the manufacture of the tumbler for the purpose of preventing the formation of a mist on the inner surfaces of the spaced walls 35 when the tumbler is later in use a,nd the walls are subjected to varied temperatures.

Although only the preferred forms of the invention have been shown and described in detail, it will nevertheless be apparent to those 40 skilled in the art, that the invention is not so limited but that various changes may be made therein without departing from the spirit of the invention or the scope of the appended claims.