GB517341A - Improvements in press-button switches - Google Patents

Improvements in press-button switches

Info

Publication number
GB517341A
GB517341A GB21966/38A GB2196638A GB517341A GB 517341 A GB517341 A GB 517341A GB 21966/38 A GB21966/38 A GB 21966/38A GB 2196638 A GB2196638 A GB 2196638A GB 517341 A GB517341 A GB 517341A
Authority
GB
United Kingdom
Prior art keywords
plunger
press
balls
casing
resistance
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
Application number
GB21966/38A
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB517341A publication Critical patent/GB517341A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01H13/28—Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs
    • 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

Abstract

517,341. Press-button switches. LIST. H. July 25, 1938, Nos. 21966 and 21967. Convention dates, Oct. 12, 1937, and Oct. 16, 1937. [A Specification was laid open to inspection under Sect. 91 of the Acts, March 3, 1939.] [Class 38 (v)] A press-button switch is so constructed that the pressure necessary to actuate it increases up to a certain point in the travel of the contactpiece and then suddenly diminishes, so as to secure rapid closing, and the increase in pressure can be regulated. For this purpose the plungerbody of the switch is formed with transverse bores in which are balls 18 pressed outwardly by springs 19. At a certain point in the travel of the plunger these balls are pressed inwardly by an inclined portion of the casing thus offering a resistance to the motion of the plunger until they are past the constricted portion of the casing. To regulate this resistance a conical member 27 is arranged to slide in the plunger without rotation, so as to press the inner ends of the springs 19 outwardly. This is effected by turning the press button 16, which is secured to the plunger so as to rotate without longitudinal motion by means of a screw 25 and is provided with a screwed extension 24 engaging the member 27. The contacts 7a, 7b are bridged by a piece 5 rotatably mounted on the plunger Several pairs of contacts in parallel are so arranged that one pair is always bridged first, thus preserving the others from damage by sparking. In a modification the helical screws 19 are replaced by a hairpin-spring, the tension of which can be regulated by a screw pressing on its bent portion. The resistance of the balls to the motion of the plunger can also be adjusted by making the constricted portion of the casing of different diameters in different axial planes and turning the plunger until the balls are in the plane required. The contact-disc 5 may be replaced by a ball rotating freely in a cage attached to the plunger. The Specification as open to inspection under Sect. 91 describes a switch without the pressure device. This subject-matter does not occur in the Specification as accepted.
GB21966/38A 1937-10-12 1938-07-25 Improvements in press-button switches Expired GB517341A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE517341X 1937-10-12

Publications (1)

Publication Number Publication Date
GB517341A true GB517341A (en) 1940-01-26

Family

ID=6549529

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21966/38A Expired GB517341A (en) 1937-10-12 1938-07-25 Improvements in press-button switches

Country Status (1)

Country Link
GB (1) GB517341A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392250A (en) * 1965-04-28 1968-07-09 Ericsson Telefon Ab L M Pushbutton mechanism with wiping action contact

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392250A (en) * 1965-04-28 1968-07-09 Ericsson Telefon Ab L M Pushbutton mechanism with wiping action contact

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