US1920538A - Switching mechanism - Google Patents

Switching mechanism Download PDF

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Publication number
US1920538A
US1920538A US462010A US46201030A US1920538A US 1920538 A US1920538 A US 1920538A US 462010 A US462010 A US 462010A US 46201030 A US46201030 A US 46201030A US 1920538 A US1920538 A US 1920538A
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United States
Prior art keywords
contacts
segment
switching mechanism
shaft
casing
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US462010A
Inventor
Wenk Juan
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Landis and Gyr AG
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Landis and Gyr AG
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Filing date
Publication date
Application filed by Landis and Gyr AG filed Critical Landis and Gyr AG
Application granted granted Critical
Publication of US1920538A publication Critical patent/US1920538A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/56—Thermally-sensitive members actuated due to deflection of bimetallic element having spirally wound or helically wound bimetallic element

Definitions

  • the invention consists in the novel parts-constructions, arrangements, combinations and improvements herein shown and described.
  • Figure 1 is a ⁇ front elevation of the present preferred and illustrative embodiment of the.
  • FIG. 1 is a side elevation of the embodiment "25 shown in Figure 1.
  • the movable contacts are adapted 4to be moved away from the stationary contacts by means of lever mechanism which is actuated by a bimetal spring, normally holding the lever in contact closing position but moving the contacts to open circuit position when the'spring is heated,4 a transformer being preferably provided and directly connected with the bimetal spring A,to heat the spring.
  • a bar 15 of insulating material extends between the two series of contacts and is pivotally mounted by means of the turned down ends 16 of the cross bar 1'7 on which bar l5 is mounted, the ends 16 being pivoted in the small lugs 18 mounted on the insulating base 13.
  • One of the ends of the cross bar 17 is also provided with a forwardly extending portion 19 to which is rigidly fastened an upwardly extending lever 20 which connects the switch operating bar 15 with the switch actuating mechanism, to be described.
  • the switch actuating mechanism preferably comprises a segment 22 rotatably mounted near the top of the casing by means of a short shaft 23 which is rotatably journaled at either end in brackets 24 securely fastened to the casing, the segment being held fast on shaft 23 by means of set screw 25.
  • At either end shaft 23 is formed with shoulders to limit the endwise movement of the shaft.
  • Segment 22 is connected with switch operating lever 20 by means of a pin ⁇ 26 extending to one side of the segment and engaging and fitting within the 'bent upper end portion 21 of the operating lever 20, so that motion of the segment will be transmitted to the lever.
  • a pair of bimetal springs 28 are provided, which are preferably of spiral form, and have their inner ends secured to the shaft 23, while their outer ends are fastened to connectors 29 mounted on a small block 30 of insulating material near the upper portion of the casing, vsothat the springs are -connected together in series by the shaft 23 which is of conducting material.
  • bimetal springs 28 may be heated either directly or indirectly, they are preferably heated Vdirectly ⁇ by passing an electric current through them, and as shown in the drawing, springs 28 are connected with the secondary of a small transformer 35, also mounted on the back portion of the'casng 14, and having its secondary

Description

Aug. 1, 1933. J. wENK 1,920,538
SWITCHING MEGHANISM Filed June 18. 1930 um. A
y u/M.
vlli
Patented 1, 1933 VUNITED STATES PATENT OFFICE swncmNG Macnmsn Y Juan Wenk, Madrid, Spain, assig'nor to Landis du' Gyr, A-G., of Zug, Switzerland, a Corporation .of Switzerland application June 1s, 1930, seal No. 462,010, and` p in Switzerland June 27, 1929 3 Claims.
'10 and combinations pointedout in the appended claims-.x 1
The invention consists in the novel parts-constructions, arrangements, combinations and improvements herein shown and described.
.The` accompanying drawing, referred to herein and constituting a part hereof, illustrates one embodiment of the invention, and together with the discription, serves to explain the principles of the invention.
l 2 Of the drawing:
Figure 1 is a `front elevation of the present preferred and illustrative embodiment of the.
invention; and v Figure 2 is a side elevation of the embodiment "25 shown in Figure 1.
circuit with which the switching mechanism is' employed., and thermally responsive means which move'the movable series of contacts, means also being Vpreferably providedfor heating the therresponsive means. As embodied, the movable contacts are adapted 4to be moved away from the stationary contacts by means of lever mechanism which is actuated by a bimetal spring, normally holding the lever in contact closing position but moving the contacts to open circuit position when the'spring is heated,4 a transformer being preferably provided and directly connected with the bimetal spring A,to heat the spring.
It will be understood that the foregoing gen- 'eral description and thev following detailed description as well are exemplary and explanatory of the invention but are not restricted thereon.
(cl. zoe-122) `ly move the movable contacts to circuit-closing position and `into i contact with the `stationary contacts 10, all of the contacts being mounted `on an insulating base 13which is supported within the casing and on thev back portion 14 of the casing. For moving the contacts 11 into and out of contact with the stationary contacts 10, a bar 15 of insulating material extends between the two series of contacts and is pivotally mounted by means of the turned down ends 16 of the cross bar 1'7 on which bar l5 is mounted, the ends 16 being pivoted in the small lugs 18 mounted on the insulating base 13. One of the ends of the cross bar 17 is also provided with a forwardly extending portion 19 to which is rigidly fastened an upwardly extending lever 20 which connects the switch operating bar 15 with the switch actuating mechanism, to be described.
As embodied, the switch actuating mechanism preferably comprises a segment 22 rotatably mounted near the top of the casing by means of a short shaft 23 which is rotatably journaled at either end in brackets 24 securely fastened to the casing, the segment being held fast on shaft 23 by means of set screw 25. At either end shaft 23 is formed with shoulders to limit the endwise movement of the shaft. Segment 22 is connected with switch operating lever 20 by means of a pin `26 extending to one side of the segment and engaging and fitting within the 'bent upper end portion 21 of the operating lever 20, so that motion of the segment will be transmitted to the lever. For moving the segment, a pair of bimetal springs 28 are provided, which are preferably of spiral form, and have their inner ends secured to the shaft 23, while their outer ends are fastened to connectors 29 mounted on a small block 30 of insulating material near the upper portion of the casing, vsothat the springs are -connected together in series by the shaft 23 which is of conducting material.
While the bimetal springs 28 may be heated either directly or indirectly, they are preferably heated Vdirectly `by passing an electric current through them, and as shown in the drawing, springs 28 are connected with the secondary of a small transformer 35, also mounted on the back portion of the'casng 14, and having its secondary
US462010A 1929-06-27 1930-06-18 Switching mechanism Expired - Lifetime US1920538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1920538X 1929-06-27

Publications (1)

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US1920538A true US1920538A (en) 1933-08-01

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US462010A Expired - Lifetime US1920538A (en) 1929-06-27 1930-06-18 Switching mechanism

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