US876361A - Process of making socket members for hot-water bottles or the like. - Google Patents

Description

N0. 876,361. PATENTED TA-N 14. 1908. H. P. KRAFT 6: M. C. SOHWEINERT. PROCESS OF MAKING SOCKET MEMBERS FOR HOT WATER BOTTLES OR THE LIKE.

APPLICATION FILED APR-12.1907.

FIG.

W I I H wvm WITNESSES:

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UNITED sTATEs PATENT orisron HENRY P. KRAFT, OF NEW YORK, N. Y., AND MAXIMILIAN CHARLES SGlUVElNERT, OF WEST HOBOKEN, NEW JERSEY.

PROCESS OF MAKING SOCKET MEMBERS FOR HOT-WATER BOTTLES OR THE LIKE.

Specification of Letters Patent.

Patented Jan. 14, 1908.

Application filed April 12.1907 Serial lie. 367.852.

To all whom "it may concern:

Be it known that-wepHENaY P.: KRAFT, residing in the-borough of Brooklyn, county of Kingsycity and-State of='Ne\v- York, and MAXIMILI'AN CHARLES SGHWEINERT, residing in West Hoboken, in the county of Hudson and State of New Jersey, both citizens of-the United States, have jointly invented certain new and. useful= Improvementsin Processes of Making Socket Members for Hot-\Vater Bottles or the Like, of whiclrthe following is a specification.- I

This invention relates to an improved process forthe construction of socket members which are attached to the: necks of hot water bottles for the reception of the stopper and other devices of a similar character. Such socket members are now usually formed of thin sheet metal having a screw-thread rolled into the-cylindrical wall-thereof, the rolling operation forming both an exterior thread and an interior thread, the latter being adapted to engage the stopper. The socket member is attached to the neck of the water bottle or other device by vulcanizing the rubber'composition forming the latter around the exterior threaded 'portion of the socket member. During the operation of screwlng in the stopper and unscrewmg it,

there is considerable strain. placed upon the connection between the socket member and the neck of the bag. This strain 18 occasionally sufhcient to loosen the connection between the parts, thus causing the bag to leak.

It has been roposed to provide the exterior thread of t -e socketmember with a series of indentations or projections, so as to secure a firmer connection between the socket member and the neck of the bag, such PIOJGCUOIIS being formed by cutting notches in the threads of the socket member.

Our invention provides an improved proc cording to its preferred form, we first takc'a suitably shaped metal blank and by the use of proper tools shape it int the form shown in Fig, 1:

is provided with a top flange a, plain cylindrical walls I) and a bottom flange 0. Heretofore the blank has been screwthreaded, and afterwards subjected to the operation of a die to produce the roughened efi'ect, but we have found in practice that this tends to distort the metal and produce a considerable pcrcentage of imperfcctarticles. According to our invention we first roughen the entire cylindrical wall 6 before the formation of the screw-threads. This is done by the use of any suitable hurling or roughcning tool (preferablythe former) which acts upon the exterior of the socket member, the knurled depressions being preferably extended lengthwise of the socket member so that they are disposed at right angles to the strain during In this figure the socket member -\vl11(:l1 is indicated as a whole by the letter A screwing and unscrewing of the stopper.

Another important advantage in performing the nurling or roughening operation before the screw-threading operation is that the device may be easily and quickly placed automatically upon a n) andrcl or expanding chuck,

-while if the nurling or other roughening operation were performed subsequently to the screw-threading operation, the blank would necessarily have to be placed upon a threaded mandrel in order that its screw-threads might be properly supported. This requires that each blank be-screwcd onto the mandrel and unscrewed therefrom thus wasting con siderable time at each operation. After the nurling operation the blanks are fed into a suitable screw-threadingmachine which is adapted to roll a thread in the wall of the blank, thus completing the device.

We have found in practice that in the complcted socket member the eil'ect of the nurling tool does not extend materially to the interior wall of the member. Said wall is substantially as smooth as in an unknurled device. We have also found that the threading operation does not have any material effect upon the intrling on the exterior portions of the threads, leaving these substantially asrough as before the threading operation. The completed socket member is shown in elevation in Fig. 3 and in section in Fig. 4,

and the screw-threads by the letter e.

.thenurling being indicated by the letter (i ber and the rubber forming the neck of the bag, with little or no increase in cost over the present constructions.

It will be understood while we have described our invention in connection with a socket member for hot water ba -s, that it is applicable to any similar device w ich itis desirable to provide with a roughened exterior. It will also be( understood while we have shown a construction in which all of the threads are knurled, that only part of such threads may be so roughened if desired. It will also be understood that instead of nurling the threads any other means of roughening the exterior surface of the device may be employed.

What we claim is v 1. The process of making a screw-threaded socket member or. the like, which. consists in forming the member into appropriate shape, then roughening its walls, and finally screwthreading the roughened wall.

3. The process of making a screw-threadedsocket member or the like, which consists in forming the member into appropriate shape, then nurlin treading the murled wall.

4. The process of making a screw-threaded socket member or the like, which consists in forming the member into ap ropriateshape, then nurling its wall, an finally screw threading the knurled Wall by bending the metal of such wall.- I

its wall, and finally screw:

In witness whereof, we have hereunto signed our names in thepresence of two subscribing witnesses.

HENRY P. KRAFT. MAXIMILIAN CHARLES SCHWEINERT- Witnesses:

EUGENE V. MYERS, FRED WHITEJ?

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