US1498817A - Electrical switch - Google Patents

Electrical switch Download PDF

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Publication number
US1498817A
US1498817A US562408A US56240822A US1498817A US 1498817 A US1498817 A US 1498817A US 562408 A US562408 A US 562408A US 56240822 A US56240822 A US 56240822A US 1498817 A US1498817 A US 1498817A
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US
United States
Prior art keywords
stem
bushing
spring
collar
nut
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Expired - Lifetime
Application number
US562408A
Inventor
Smith John Henderson
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to US562408A priority Critical patent/US1498817A/en
Application granted granted Critical
Publication of US1498817A publication Critical patent/US1498817A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/56—Angularly-movable actuating part carrying contacts, e.g. drum switch
    • H01H19/58—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S16/00—Miscellaneous hardware, e.g. bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance
    • Y10S16/30—Knob, control lever
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20732—Handles
    • Y10T74/20834—Hand wheels
    • Y10T74/2084—Knob or dial

Definitions

  • This invention relates to electrical switches, and more particularly to rotary switches.
  • a bushing adapted to receive a rotating member.
  • the rotating member is held in place by a spring and is held sufficiently tight to prevent accidental movement but is free to move when pressure is applied thereto.
  • the rotating member or stem is provided with a washer arranged adjacent the top of the bushing, and adapted to be held in contact with the face of the bushing by the tension of the spring to retain the member in proper position.
  • I provide a washer or collar formed integral with the stem.
  • the lower end of the stem is reduced, forming a shoulder and the reduced portion is threaded for the reception of a nut.
  • the tension of the spring may be pre-arranged and the provision of an integral collar engaging the face of the bushing maintains the proper tension on the rotating member at all times.
  • Figure l is a front elevation of portion of a panel board showing the invention applied
  • Figure 2 is a vertical sectional view on line 2 2 of Figure l, and,
  • Figure 3 is a perspective view of the rotating member detached.
  • the reference numeral 1 designates a panel board of the usual construction, having a plurality of spaced concentric contact members arranged thereon.
  • the panel board is provided with an opening adapted to receive a bushing 3.
  • a coil spring f 13 is arranged around the rotating member, one end of the coil spring engaging the lower face of the bushing and the other end engaging a nut 14 arranged on the threaded portion 11 of the stem. The tension of the spring draws the rotating member inwardly into the bushing.
  • a nut lock 15 may be arranged on the end of the reduced portion to retain the nut 14 in position.
  • The. rotating stem is provided with an integrai collar or washer 16 which is adapted to engage the collar e of the bushing and thus ret-ain the switch in a set position.
  • the stem is threaded,l as at 17, and is adapted to receive a handle or knob 18, of insulating material.
  • This lrnob is provided with a central opening having a metallic ferrule 19 arranged therein, and the ferrule is provided with threads adapted to engage the threads which engage the stem.
  • the operation of the device will be apparent from the foregoing description.
  • the collars e and 1G are held in frictional engagement by the spring, preventing accidental movement of the switch from a selected contact 2.
  • the friction may be overcome by pressure, and the switch may be moved to another contact by turning the knob 18.
  • the length of the stem between the collar and the shoulder is predetermined to place a definite desired pressure on the stem when the spring 13 is placed in position and the nut 14 tightened.
  • By providing a shoulder the inward movement of the nut 14 is limited and the tension of the spring 13 predetermined.
  • a bushing adapted to be arranged in a suitable support, said bushing being provided with a central openn ing and having a collar formed on its outer end, a vrotating element arranged in said opening and projecting beyond the ends of the-bushing, the outer end of said element being provided with an integral enlarge- 15k ment adapted to contact with the collar of Vof said spring engaging the inner end of the bushing, and a nut arranged on the reduced portion of the rotating element adapted to form a stop for said spring
  • afx my signa- ⁇ ture in presence of two witnesseses.

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  • Switch Cases, Indication, And Locking (AREA)

Description

Jime 24, 1924. ,A 1,498,817
` J. H. SMITH v ELECTRICAL SWITCH Filed May 2O, 1922 Patented june 24, 1924.
UNITED .STATES JOHN HENDERSON SMITH, OF CHARLOTTESVILLE, VIRGINI.
ELECTRICAL SWITCH.
Application led May 2o, 1922. serial No. 562,408.
To all whom t may concer/11:
Be it known that I, JOHN HENDERSON SMITH, a citizen of the United States, residing at Charlottesville, in the county of Albemarle and State of Virginia, have invented certain new and useful Improvements in Electrical Switches, of which the following is a specification.
This invention relates to electrical switches, and more particularly to rotary switches.
In the present construction of rotary switches, there is provided a bushing adapted to receive a rotating member. The rotating member is held in place by a spring and is held sufficiently tight to prevent accidental movement but is free to move when pressure is applied thereto. The rotating member or stem is provided with a washer arranged adjacent the top of the bushing, and adapted to be held in contact with the face of the bushing by the tension of the spring to retain the member in proper position.
I have found that euch construction is disadvantageous, in that the washer loosens from the stem and permits the rotating member to move from one position to another.
In the present invention, I provide a washer or collar formed integral with the stem. The lower end of the stem is reduced, forming a shoulder and the reduced portion is threaded for the reception of a nut. By providing` a shoulder to limit the inward movement of the nut, the tension of the spring may be pre-arranged and the provision of an integral collar engaging the face of the bushing maintains the proper tension on the rotating member at all times.
In the accompanying drawings, I have shown one embodiment of the invention. In this showing:
Figure l is a front elevation of portion of a panel board showing the invention applied,
Figure 2 is a vertical sectional view on line 2 2 of Figure l, and,
Figure 3 is a perspective view of the rotating member detached.
Referring to the drawings, the reference numeral 1 designates a panel board of the usual construction, having a plurality of spaced concentric contact members arranged thereon. The panel board is provided with an opening adapted to receive a bushing 3.
at 11, forming a shoulder 12. A coil spring f 13 is arranged around the rotating member, one end of the coil spring engaging the lower face of the bushing and the other end engaging a nut 14 arranged on the threaded portion 11 of the stem. The tension of the spring draws the rotating member inwardly into the bushing. A nut lock 15 may be arranged on the end of the reduced portion to retain the nut 14 in position.
The. rotating stem is provided with an integrai collar or washer 16 which is adapted to engage the collar e of the bushing and thus ret-ain the switch in a set position. Beyond the collar, the stem is threaded,l as at 17, and is adapted to receive a handle or knob 18, of insulating material. This lrnob is provided with a central opening having a metallic ferrule 19 arranged therein, and the ferrule is provided with threads adapted to engage the threads which engage the stem.
The operation of the device will be apparent from the foregoing description. The collars e and 1G are held in frictional engagement by the spring, preventing accidental movement of the switch from a selected contact 2. The friction, however, may be overcome by pressure, and the switch may be moved to another contact by turning the knob 18. By providing a collar formed integral with the stem 9, the possibility of the collar or washer becoming loose and thus permitting the stem to rotate freely is overcome. The length of the stem between the collar and the shoulder is predetermined to place a definite desired pressure on the stem when the spring 13 is placed in position and the nut 14 tightened. By providing a shoulder, the inward movement of the nut 14 is limited and the tension of the spring 13 predetermined.
It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape7 size, and arrangement of parts may be resorted to Without departing from the spirit of the invention or the scope of the subjoined claim.
Having thus described my invention, I claim:
In a rotating switch, a bushing adapted to be arranged in a suitable support, said bushing being provided with a central openn ing and having a collar formed on its outer end, a vrotating element arranged in said opening and projecting beyond the ends of the-bushing, the outer end of said element being provided with an integral enlarge- 15k ment adapted to contact with the collar of Vof said spring engaging the inner end of the bushing, and a nut arranged on the reduced portion of the rotating element adapted to form a stop for said spring In testimony whereof, afx my signa- `ture in presence of two Witnesses.
'JOHN HENDERSON SMITH;Y
Witnesses:
GEO. E. PRICE,
US562408A 1922-05-20 1922-05-20 Electrical switch Expired - Lifetime US1498817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US562408A US1498817A (en) 1922-05-20 1922-05-20 Electrical switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US562408A US1498817A (en) 1922-05-20 1922-05-20 Electrical switch

Publications (1)

Publication Number Publication Date
US1498817A true US1498817A (en) 1924-06-24

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Application Number Title Priority Date Filing Date
US562408A Expired - Lifetime US1498817A (en) 1922-05-20 1922-05-20 Electrical switch

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0483557A1 (en) * 1990-10-31 1992-05-06 Siemens-Elema AB Control unit of a medical apparatus
US20150020644A1 (en) * 2013-03-19 2015-01-22 Kidkraft, Lp Screwless knob assembly for toys
US10114405B2 (en) * 2016-02-15 2018-10-30 Electrolux Home Products, Inc. Safety control lockout knob

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0483557A1 (en) * 1990-10-31 1992-05-06 Siemens-Elema AB Control unit of a medical apparatus
US5271293A (en) * 1990-10-31 1993-12-21 Siemens Aktiengesellschaft Control unit for a medical apparatus
US20150020644A1 (en) * 2013-03-19 2015-01-22 Kidkraft, Lp Screwless knob assembly for toys
US10114405B2 (en) * 2016-02-15 2018-10-30 Electrolux Home Products, Inc. Safety control lockout knob
US10437278B2 (en) 2016-02-15 2019-10-08 Electrolux Home Products, Inc. Safety control lockout knob
US10976767B2 (en) 2016-02-15 2021-04-13 Electrolux Home Products, Inc. Safety control lockout knob

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