Reed switches and process for making them |
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| 申请号 | US40079673 | 申请日 | 1973-09-26 | 公开(公告)号 | US3866317A | 公开(公告)日 | 1975-02-18 |
| 申请人 | MOREX INC; | 发明人 | MORRILL JR VAUGHAN; | ||||
| 摘要 | A reed switch is provided preferably with an envelope noncircular and in particular a flattened oval in cross section. Reed switch elements, each having a reed section, a sealing section and a lead section are sealed into the envelope along a part less than the total length of the sealing section, the unsealed part of the sealing section being in close engagement with the inner wall of the envelope. A method of making a reed switch is provided wherein reed switch elements each including a reed section, a sealing section and a lead section are inserted into a tube, preferably non-circular, the sealing section of the elements and the interior of the tube being so closely dimensioned as to permit them to locate the reed sections with respect to one another before and during a sealing process. In the preferred method, a multiplicity of pairs of switch elements are inserted in a glass tube of oval cross section, lengthwise of the tube, and sealed in place in a horizontal position, providing symmetrical sealed joints, and thereafter the tube offal between the switches is removed. | ||||||
| 权利要求 | 1. A method of forming a reed switch comprising forming a noncircular, non-magnetic tube, inserting into said tube and positioning in lengthwise spaced positions a plurality of sets of pairs of reed switch elements, each of said elements including a reed section, a sealing section engaging the inner wall of said tube, and a lead section, the reed elements of each set being in facing and partly overlapping position, and thereafter sealing the reed elements of each set within said tube along at least a part of said sealing section. 2. The method of claim 1 wherein the reed section of each of said elements is offset laterally from the sealing section, facing reed sections being offset in opposite directions with respect to one another, and the sealinG section of each element is closely dimensioned with respect to the inside dimensions of the tube closely to engage the wall of said tube, and sealing section serving as the sole locating element to determine and control at least five or six degrees of freedom of the reed elements of each pair of elements when said elements are inserted into said tube. 3. The method of claim 2 wherein the sealing section of each element is of a length with respect to the sealing area to project beyond the sealing area during initial sealing whereby said sealing section maintains its locating function during the sealing step. 4. A method of forming a reed switch comprising forming a non-circular, non-magnetic tube, inserting into said tube and positioning in lengthwise spaced positions a plurality of sets of pairs of reed switch elements, each of said elements including a reed section, a sealing section engaging the inner wall of said tube, and a lead section, the reed elements of each set being in facing and partly overlapping position, sealing the reed elements of each set within said tube along at least a part of said sealing section, and thereafter removing tube parts between successive sealed sets to produce separate reed switches. 5. The method of claim 4 wherein the tube is formed of glass. 6. The method of claim 5 wherein the last step is accomplished by scoring the tube and subsequently bending said tube. 7. A method of forming a reed switch comprising forming a non-circular, non-magnetic tube, forming a reed switch element having a reed section, a lead section and a sealing section intermediate said reed and lead sections, said sealing section being dimensioned with respect to the interior configuration of said tube to engage the inside wall of said tube through a substantial length, inserting said switch elements into said tube, causing said sealing section to bear upon said inner wall to serve as the sole locating element to determine and to control at least five of six degrees of freedom of the reed element, and thereafter sealing said elements in said tube intermediate the ends of said sealing section but through less than the full length of the sealing section of said element, whereby the engagement of the sealing section with the inside wall of said tube in the areas of the sealing section and tube beyond the area in which the tube and sealing section are sealed serves during the sealing step to maintain said element in its predetermined position. |
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