US2822437A - Flexible contact for control switch - Google Patents

Flexible contact for control switch Download PDF

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Publication number
US2822437A
US2822437A US375463A US37546353A US2822437A US 2822437 A US2822437 A US 2822437A US 375463 A US375463 A US 375463A US 37546353 A US37546353 A US 37546353A US 2822437 A US2822437 A US 2822437A
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US
United States
Prior art keywords
contact
sides
flexible
point
force
Prior art date
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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US375463A
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English (en)
Inventor
Ruesch Hannes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
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
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Publication of US2822437A publication Critical patent/US2822437A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B15/00—Wheels or wheel attachments designed for increasing traction
    • B60B15/26—Auxiliary wheels or rings with traction-increasing surface attachable to the main wheel body
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs

Definitions

  • the present invention relates to a novel improvement in flexible contacts for control switches, particularly, in control switches used in tumbler switches for regulating electrical appliances.
  • the invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.
  • switch contacts in which a pair of parallel strips are connected across the ends by webs and in which one of the strips is shortened, as for example, by folding.
  • This construction causes the other strip to bend in the shape of a bow and the opposite transverse web to execute snap motions if a controlling force is applied to the flexed strip.
  • the disadvantage of this construction is that the magnitude of the snap motion is practically the same as the magnitude of the motion of the force applied to the flexed strip.
  • This type of contact therefore, is not considered to be suitable for control functions and is limited to use in manually operated switches.
  • the applicants invention comprises a flexible contact formed from flexible material.
  • One side of the contact is fixedly positioned with respect to the switch while the opposite ends of the contact are placed under a permanent stress which deforms the opposite end in such a manner that the opposing corners are disposed on opposite sides of a plane passing through the clamped side.
  • the unclamped portions of the contact are permanently stressed so as to form asymmetrical deformations in the remaining sides.
  • the applicant preferably provides a quadrilateral contact in which one side is clamped to the switch body. The contact is either deformed by a squeezing operation which produces an elongation in one side or a member is inserted in the contact in such a manner as to cause the opposing sides of the contact to spread.
  • the contact is admirably suited to 'impart snap motions to certain portions thereof. These motions will occur whenever a suitable control'force is applied to one side of the contact at a point adjacent to the fixed side which force will cause the opposite side of the contact to snap into a substantially opposite position.
  • Figure 1 is a plan view of one form which the invention may take;
  • Figure 2 is a lateral elevation of Figure 1 showing the contact applied to a switch mechanism
  • Figure 3 is an end elevation of Figure 1;
  • Figure 4 is a plan view of another form of the invention.
  • Figure 5 is a lateral elevation of Figure 4.
  • Figure 6 is an end elevation of Figure 4.
  • Figure 7 is a plan view of a third embodiment of'the invention.
  • Figure 8 is a lateral elevation of Figure 7
  • Figure 9 is an end view of Figure 7.
  • FIG. 1 there is shown a quadrilateral, oblique-angled frame constructed from any suitable flexible material such as sheet metal.
  • the side 11 of the frame serves as a clamping side and may be joined to the switch body 22 by any suitable means.
  • the remaining free sides 12, 13, 14 have eachbeen stifiened at the outer side by means of a longitudinal edge. Between these stiffened sides lie the flexible corner zones 15, 16, 17, 18.
  • the side 12 has been squeezed at a point 19 in such a way that the side is given a permanent deformation, namely an elongation and the compressive stress caused thereby in the material produces an asymmetrical twist on each of the two opposite sides.
  • the normal position of the contact the contact rivet 21 bears against a stationary contact 23, and in the operative position against the stationary contact 24.
  • the distance between the contacts 23, 24 and the lateral deformation of the contact rivet 21 relative to the clamping side 11 are selected so that the contacts 21, 23 rest, in the inoperative position, upon each other and, in the operative position, the contacts 21, 24 touch each other before reaching dead center, so that when the controlling force is removed from the point 20 the frame snaps back into the inoperative position automatically.
  • the manner of clamping side 11 to the switch body 22 is not important and may take any one of many forms.
  • the side may be screwed to the switch body, or riveted or soldered and it is of no importance whether the clamping is effected for the entire length of the side 11 or for only a portion of it, or at individual points only.
  • the point of force application 20 bound to any particular location.
  • the latter may be changed to cor- Patented Feb. 4, 1958 respond to the magnitude of the controlling force and the control stroke desired.
  • the closer the point 20 is to the corner zone 15 the greater must be the controlling force with a small control stroke.
  • the corner Zone 13 is the limit of location for the point 20.
  • the corner zone 18 also executes a snap motion, but one with a smaller stroke than that of the corner zone 17, because the corner zone 17 lies on the longer diagonal. -If both zones 17, 18 are to have the same stroke in carrying out the control function the two diagonals must be made of the same size, i. e., the frame must be given the shape of a-trapezoid or a rectangle.
  • FIG. 4-6 there is; shown an embodiment of the invention in which the frame is formed in the shape of a rectangle.
  • the free sides are stiffened by means of longitudinal edges.
  • the deformation for the creation of compressive strain is attained by cutting open the frame at point 25, and providing therein a hole to receive the contact rivet 26.
  • the diameter of the hole is somewhat smaller than the diameter of the rivet and when the rivet is inserted into the hole the opposite sides of the rectangle are spread out and assume the position shown in Figure 5.
  • a controlling force acts at the point 27 and the two free corner zones are tilted with the same stroke.
  • FIG. 7-9 Another embodiment of the invention is illustrated in Figures 7-9 where the side opposite the clamping side of a rectangular frame is cut out and the free ends of the two sides are spread out by inserting therebetween another side 28 which is longer than the side cut out.
  • each of the sides is provided with notches 29, 30 in which the ends of a side 28 are incased.
  • the controlling force acts at a point 31 and the two ends of the sides are tilted with the same stroke.
  • the contact rivet 32 is provided on only one side but it is to be understood that the other side may also be provided with a contact rivet if desired.
  • the applican'ts invention may take many forms. It is not necessary to cut the sheet metal with parallel sides to form a frame but the same snap motion may be attained with a solid sheet if the sheet is braced in consequence of a permanent deformation produced by inner compressive strains. However, if the sheet metal is cut out and the sides are stiffened by longitudinal edges a more striking snap effect is attained.
  • a flexible contact said contact forming a polygonal member having one side adapted to be fixedly secured to a base and a free side disposed oppositely to the first-mentioned side and having oppositely disposed corners thereon, said contact being stressed so as to cause the corners of the free side to lie on opposite sides of the plane of the first-mentioned side whereby a force applied to the contact on a side other than the first-mentioned side will cause a snap motion in the corners of the free side.
  • a flexible contact as set forth in claim 1 characterized in that the sides are stiffened by longitudinal flanges intermediate the corners thereof so that the stress in the contact twists the contact at the corners.
  • a flexible contact as set forth in claim 1 in which the contact is a quadrilateral formed with unequal sides so as to have unequal diagonal distances and an electrical contact point is provided at that corner of the free side which lies on the longer diagonal.
  • a flexible contact as set forth in claim 1 in which the contact is stressed by squeezing one side so as to produce an elongation therein.
  • a flexible contact as set forth in claim 2 having a rectangular-shaped contact with an opening in a corner of the contact, and a member inserted into the opening to spread the free sides of the rectangular contact thereby producing a snap motion in one side of the contact whenever a control force is exerted on the opposite side.
  • a flexible contact as set forth in claim 2 having a U-shaped contact and a member inserted between the open ends of the contact said member having a length greater than the normal distance between the open ends so that the opposite sides of the contact are disposed on opposite sides of the plane of the fixed side.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Push-Button Switches (AREA)
US375463A 1952-08-30 1953-08-20 Flexible contact for control switch Expired - Lifetime US2822437A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2822437X 1952-08-30

Publications (1)

Publication Number Publication Date
US2822437A true US2822437A (en) 1958-02-04

Family

ID=42830332

Family Applications (1)

Application Number Title Priority Date Filing Date
US375463A Expired - Lifetime US2822437A (en) 1952-08-30 1953-08-20 Flexible contact for control switch

Country Status (3)

Country Link
US (1) US2822437A (fr)
DE (1) DE951646C (fr)
FR (1) FR1082251A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL99035C (fr) * 1954-10-28 1900-01-01
DE1104612B (de) * 1957-09-13 1961-04-13 Nuernberger Schwachstrom Bauel Drehkondensator

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1895592A (en) * 1930-09-08 1933-01-31 Gen Plate Co Snap acting device
US2266537A (en) * 1937-02-16 1941-12-16 William B Elmer Snap acting device
US2275642A (en) * 1940-01-18 1942-03-10 Mu Switch Corp Switch
US2349008A (en) * 1940-12-16 1944-05-16 Sauter Fritz Snap-action rocker device
US2404874A (en) * 1944-08-11 1946-07-30 Maurice J Wohl Electric snap switch
US2483939A (en) * 1949-10-04 Pilot and buhner control
US2545264A (en) * 1947-07-03 1951-03-13 Lincoln K Davis Warpable frame actuating device for use with electric switches and the like
US2592357A (en) * 1949-01-03 1952-04-08 Foster J Trainor Electric snap switch
US2624819A (en) * 1951-01-10 1953-01-06 Gen Electric Snap action switch
US2630504A (en) * 1950-11-29 1953-03-03 Lyndon W Burch Motion translating device
US2660646A (en) * 1951-08-24 1953-11-24 Edison Inc Thomas A Thermostatic switch

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2340615A (en) * 1942-03-20 1944-02-01 Radio Patents Corp Snap action device
FR1003765A (fr) * 1947-02-22 1952-03-21 Dispositif à déclic instantané perfectionnés et leurs applications

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2483939A (en) * 1949-10-04 Pilot and buhner control
US1895592A (en) * 1930-09-08 1933-01-31 Gen Plate Co Snap acting device
US2266537A (en) * 1937-02-16 1941-12-16 William B Elmer Snap acting device
US2275642A (en) * 1940-01-18 1942-03-10 Mu Switch Corp Switch
US2349008A (en) * 1940-12-16 1944-05-16 Sauter Fritz Snap-action rocker device
US2404874A (en) * 1944-08-11 1946-07-30 Maurice J Wohl Electric snap switch
US2545264A (en) * 1947-07-03 1951-03-13 Lincoln K Davis Warpable frame actuating device for use with electric switches and the like
US2592357A (en) * 1949-01-03 1952-04-08 Foster J Trainor Electric snap switch
US2630504A (en) * 1950-11-29 1953-03-03 Lyndon W Burch Motion translating device
US2624819A (en) * 1951-01-10 1953-01-06 Gen Electric Snap action switch
US2660646A (en) * 1951-08-24 1953-11-24 Edison Inc Thomas A Thermostatic switch

Also Published As

Publication number Publication date
DE951646C (de) 1956-10-31
FR1082251A (fr) 1954-12-28

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