US2621013A

US2621013A - Stopcock rotor

Info

Publication number: US2621013A
Application number: US198931A
Authority: US
Inventors: Mansfield Ernest John
Original assignee: W Edwards and Company London Ltd
Current assignee: Edwards High Vacuum Ltd
Priority date: 1949-12-31
Filing date: 1950-12-04
Publication date: 1952-12-09
Anticipated expiration: 1969-12-09
Also published as: GB689181A

Description

Dec. 9, 1952 E. J. MANSFIIELD STOPCOCK ROTOR Filed Dec. 4, 1950' Inventor M w w Patented Dec. 9, 1952 STOPCOCK ROTOR Ernest John Mansfield, London, England, assignor to W. Edwards & Co. (London) Limited, London, England Application December 4, 1950, Serial No. 198,931 In Great Britain December 31, 1949 d Claims.

This invention concerns glassware stop-cocks.

In the usual form of stop-cock the rotor comprises a conical body and a transverse handle fused to the larger end of thebody.

A disadvantage with this known form of rotor is that there is considerable risk of fracture of the neck between the handle and the body when excessive rotary force is applied and furthermore it is mostdifficult to examine the bore in the rotor when the stop-cock is assembled.

An object of the present invention is to provide an improved form of rotor which avoids one or both of the above disadvantages.

According to one feature of the present invention the handle is in the form of a flange of circular or polygonal outline which may extend around the periphery of the larger diameter end of the body. In use, therefore, one grips a surface of more or less circular outline rather than the usual narrow handle which is held between the finger and thumb.

According to a further feature of the invention the body and handle of the rotor are hollow and may be formed from tubular stock. A bore in such rotor then may take the form of a diametrically extending tube sealed at its opposite ends into the wall surface of the hollow :body. Thus the bore can readily be viewed when the stop-cock is assembled and its contents may be inspected from either open end without having to look through a substantial thickness of glass and/or through a film of grease (usually two thicknesses of glass and the grease film).

The invention will be described further with reference to the accompanying drawings, which show a preferred embodiment of the invention, and in which:

Fig. 1 is a perspective view of a rotor constructed in accordance with the invention,

Fig. 2 is a plan View of a rotor corresponding to Fig. 1 and seen from above,

Fig. 3 is a plan view of a rotor seen from below,

Fig. 4 is a side elevation thereof, in section on the line AA of Fig. 3,

Fig. 5 shows a rotor having a handle of polygonal shape,

Fig. 6 shows a rotor in which the handle is knurled, and

Fig. 7 shows a rotor in which the flange has been deformed to produce two web-shaped proin an outward curve extending rathermore-than The outer surface of this flange (Fig. 6) may be knurled to facilitate gripping. Two diametrically opposite pips 3 are fused on to the surface of the flange 2 to assist in the turning action applied to the rotor body I oralternatively the flange may, as shown in Fig. 7, be deformed at diametrically opposite points to form two webshaped protuberances 3| which serve thesame purpose as the pips 3. The flange may furthermore be formed by attaching to the rotor body a separate ring or disc of glass, metal or other material.

A bore 4 is comprised by a diametrically extending tube sealed at its opposite ends into the wall surface of the hollow body I. Above and below the bore, cannelures 5 shaped as grooves of radiused section and each having a width commensurate with the diameter of said bore, are provided for retaining supplies of grease for sealing. Such grease seals permit of a shorter and more compact stop cock construction.

Although in the embodiment of the invention as described above the flange 2 has been defined as having circular shape, other shapes may prove equally advantageous. As an example, in Fig. 5, a flange 2! having a polygonal outline is illustrated.

These forms of stop-cock rotor are readily adaptable to the provision of an eifective metal retaining clip for preventing separation of the components of the cock. They are more readily produced than rotors of the conventional type and may be made without employment of skilled glass blowing methods.

I claim:

1. A stop-cock rotor including a tapering body portion, a handle disposed at the larger diameter end thereof, both said body portion and said handle being hollow and being formed from tubular stock, and a diametrically extending tube sealed at its opposite ends into the body portion to form a bore therethrough, said handle comprising an outwardly turned over flange extending around the periphery and forming a continuation of said larger diameter end, whereby the resultant open construction of said handle enables inspection of said bore to be effected.

2. A stop-cock rotor including a tapering body portion, a handle disposed at the larger diameter end thereof, both said body portion and said handle being hollow and being formed from tubular stock, and a diametrically extending tube tion to form a bore therethrough, said handle comprising an outwardly turned over and fluted flange extending around the periphery and forming a continuation of said larger diameter end, and two diametrically opposed pips fused on to said flange, whereby the resultant open construction of said handle enables inspection of said bore to be effected, and said pips in cooperation with said fluting provide for a positive grip of said handle.

3. A stop-cock rotor including a tapering body portion, a handle disposed at the larger diameter end thereof, both said body portion and said handle being hollow and being formed from tubular stock, and a diametrically extending tube sealed at its opposite ends into the body portion to form a bore therethrough, said handle comprising an outwardly turned over and fluted flange extending around the periphery and forming a continuation of said larger diameter end, and two web-shaped protuberances formed by deformation of said flange at diametrically opposite points thereof, whereby the resultant open construction of said handle enables inspection of said bore to be effected, and said protuberances in cooperation with said fiuting provide for a positive grip of said handle.

4. A stop-cock rotor including a tapering body portion, a handle disposed at the larger diameter end thereof, both said body portion and said handle being hollow and being formed from tubular stock, and a diametrically extending tube sealed at its opposite ends into the body portion to form a bore therethrough, said body portion being formed with cannelures above and below the bore to retain supplies of grease for sealing, said handle comprising an outwardly turned over flange extending around the periphery and forming a continuation of said larger diameter end, whereby the resultant open construction of said handle enables inspection of said bore to be effected, and said grease sealing makes possible a short and compact construction of said rotor.

ERNEST JOHN MANSFIELD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,349,823 Eimer et al Aug. 17, 1920 1,533,793 Failla Apr. 14, 1925 1,714,606 Lotz May 28, 1929 2,273,205 Kemmer et a1 Feb. 17, 1942 FOREIGN PATENTS Number Country Date 329,029 Great Britain of 1930