Improvements in teats / [Martin Dunphy Armstrong].

  • Armstrong, Martin Dunphy.
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in teats / [Martin Dunphy Armstrong]. Source: Wellcome Collection.

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    Date of Application, 14th July, 1892 Complete Specification Left, 13th Apr., 1893—Accepted, 13th May, 1$93 PROVISIONAL SPECIFICATION. Improvements in Teats. 1, Martin Dunphy Armstrong, of 24, Christie Road, South Hackney Manager of India Rubber Works, do hereby declare the nature of this invention to be as follows :— My invention relates to the manufacture of india rubber teats for feeding bottles, 5 babies toys, veterinary purposes and some other uses, and refers to an arrangement of ribs or prominences on the internal surface of the teat by which several material and important advantages are obtained. Instead of making the teat, as is usual, of equal or nearly equal thickness throughout, I make the internal surface of the teat with a series of papillae, 10 prominences, points, corrugations, ribs, or ridges arranged either longitudinally, obliquely, annularly or otherwise, but I prefer the longitudinal arrangement, thereby producing between such papillae ribs, or ridges, a series of hollows or channels. And I make such prominences and hollows extend from the thickened annular 15 part which usually forms the base of the teat to, or nearly to, the apex or I may make them extend only part of length of the teat, viz. to commence a short distance from the basal ring and terminate a short distance before reaching the apex. These internal prominences give the teat a degree of resiliance which those of 20 ordinary construction do not possess and which makes it seem to the touch to resemble the human nipple more nearly than do the teats now in common use, and further this construction prevents the flow of milk being entirely stopped by the pressure of the childs gums, for the channels or depressions between the said prominences are not easily entirely closed and thus a constant flow of the milk or 25 other fluid is secured, and the internal surfaces are not likely to stick together as those now in use so often do and are thereby rendered useless. With my improved teats there is much less liability of air obtaining admission, for in the ordinary teat the passage becomes entirely closed when the child nips the teat, and it is then necessary for the child to let go its hold more or less 30 completely before the teat can open to again allow the milk to pass, and it is at this moment that the teat usually becomes filled with air, which enters more quickly than the milk, and which air has afterwards to be sucked out by the child, to its manifest disadvantage, whereas with my improved teat the milk passage is never entirely closed, the flow is almost constant, and no such entry of air is likely to 35 take place, or not to the same extent. My invention is also specially advantageous for teats for feeding lambs, calves, and the like. This teat also affords great facilities for cleansing, as it may be very perfectly and easily washed by being rolled a few times between the thumb and finger in 40 warm water, thus avoiding the necessity for brushes or other cleansing devices. It will be obvious that my improved teats may be made with any desired perforations as for instance one or more leech-bite perforations or simple perforations or, for suction purposes, without perforation. Dated the Fourteenth day of July 1892. 45 NEWNHAM BROWNE, Agent for the Applicant.