US2410062A - Telephone key - Google Patents

Telephone key Download PDF

Info

Publication number
US2410062A
US2410062A US534420A US53442044A US2410062A US 2410062 A US2410062 A US 2410062A US 534420 A US534420 A US 534420A US 53442044 A US53442044 A US 53442044A US 2410062 A US2410062 A US 2410062A
Authority
US
United States
Prior art keywords
key
cam
frame
pairs
apertures
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
Application number
US534420A
Other languages
English (en)
Inventor
Leslie B Haigh
Franklin A Stearn
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.)
STC PLC
Federal Telephone and Radio Corp
Original Assignee
Standard Telephone and Cables PLC
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
Priority to BE475396D priority Critical patent/BE475396A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to US534420A priority patent/US2410062A/en
Priority to GB8640/45A priority patent/GB592519A/en
Priority to FR928660D priority patent/FR928660A/fr
Application granted granted Critical
Publication of US2410062A publication Critical patent/US2410062A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details

Definitions

  • Thisinvention relates to electrical switching keys vof the type known as lever keys and more particularly to such keys designed for use in-places where space is at a premium.
  • One object of this invention is to provide a lever key which willbe easy to manufacture and which will require the minimum number of parts in manufacturing.
  • Another object of this invention is to provide a key in which the frame and actuating cam assembly is held together by means of a single screw, this screw likewise Vmountingfthe spring assembly or assemblies-upon the frame-proper of the key.
  • Yet another object of this invention is to pro vide a key in which only a singletype of cam is employed whether the key be a two or afthreev yposition key and whether locking or non-locking action be required, and infwhich pairs of oppositely disposedv holesare provided in theV key frame, in which holes a stop pin or pins may alternatively be placed to determine the extent of rotation of thel cam and thevextent ofA throw of the key.
  • Another purpose of this invention is to provide a key in which economical-assembly is promoted by arranging the cam rollers so that theyl run freely upon the cam stud and are held'thereupon by a portion of the frame.
  • FIG. 1 represents a single sided key, in front elevation and unoperated position.
  • Fig. 2 represents a single sided key, in front elevation and in operated position.
  • Fig. 3 shows the same key in side elevation and unoperated position.
  • Fig. 4 shows, in rear elevation, unoperated position.
  • Fig. 5 is a top plan view of the vsame key.
  • Fig. 6 is a front elevation, of a double sided key according to this invention, shown in un'- operated position.
  • Fig. 7 is a front elevation of in operated position.
  • Fig. 8 is a side elevation of a double sided key, in unoperated position.
  • Fig. 9 is a side view of the cam employed in this key.
  • More rigid members I8 and I 9 V may be provided in order to limit the motion of certain springs
  • roller 22 rotates freely upon cam stud 23, and stud 23 isr mounted upon a portion of the cam body 24, which latter is provided with a suitable handle 25. Roller 22 is prevented from running off the end of the stud by means of a lip 26 which projects downwardly from the upper portion of frame member I0. This avoids the'necessity of riveting a washer upon the stud after the roller has been placed thereupon, or otherwise retaining the roller in position thereupon.
  • Frame members I0 and II are provided with oppositely located bearing apertures 36.
  • Cam body 24 is provided with a bearing 50, of the hollow shaft type, which rotates upon a piny 30. This pin has the two ends'thereof inserted into the pair of corresponding apertures 39', atV the time when the key is assembled.
  • Frame members l0 and II are also provided with suitable apertures 29 and 29'; registering with one another when the respective frame members are as- The is secured by a square nut I2'- which sits in a recess inmember I4.
  • Member I4 Single non-lock Single lock Double non-lock Double lock Lock on one side, non-lock on the other side.
  • stop pin 54 is indicated at 54 in the drawings, and is preferably identical with pin 3D.
  • the frame is here constituted by two substantially identical members 40 and 4
  • Spring assemblies are arranged upon both sides of these frame members, the members being held together by screw
  • 2' passes also through the mounting members I4 of both spring assemblies.
  • this allows the employment of a single screw to hold the frame members together and the spring assemblies thereto, thus saving time in assembly and reducing the cost of manufacture.
  • the number of springs and the arrangements of contacts employed in this form of key are not essential features of the instant invention and may be selected according to the desired functioning of the key.
  • the members serving to actuate the contact springs are similar to those previously shown and described in connection with the single sided form of key and here bear corresponding reference numerals.
  • is provided with its own fastening apertures located upon the extreme upper surface thereof, into which apertures fastening screws 42 and 43 may be threaded.
  • the alignment of the two frame members is maintained by studs I3 one pressed out of or secured in each frame member.
  • Oppositely disposed pairs of apertures 29' are provided in the upper portion of frame members 40 and 4
  • each stud 23' located upon opposite sides of the cam body 24 and each stud bears a cam roller 22'.
  • a suitable lip 26 extends downwardly from the upper portion of each frame member 4D and 4
  • the extreme angular rotation of the cam may be limited by suitable means, which do not form an essential part of the instant invention.
  • the lower portion of the cam may be provided with one or more projections, 5
  • Fig. 9 shows the cam provided with main stop projections 5
  • This arrangement permits the uppermost apertures to be located at a suflicient distance from the top of the key to enable insertion of the mounting screws 42, 43 without fouling the stop pin when it is inserted in these apertures.
  • stop pin 54 will encounter one only of the stop projections 5
  • a switching key comprising a frame, a rotatable cam mounted upon a pivot in said frame, Contact springs operable by said cam, a projection on the periphery of said cam, a plurality of pairs of oppositely disposed holes in said frame. said pairs of holes being located at different angular positions relative to the said pivot and at such radial distance from said pivot that said cam projection passes over each of said pairs of holes during rotation of said cam and a removable pin for insertion in any one of said pairs of holes for cooperation with said projection whereby the degree of rotation of said cam and the extent of throw of the key may be varied.
  • a switching key comprising a frame, a rotatable cam mounted upon a pivot in said frame, contact springs operable by said cam, a plurality of projections on the periphery of said cam having cam surfaces at different radial distances from said pivot, a plurality of pairs of oppositely disposed holes in said frame, said pairs of holes being located at different radial distances from said pivot such that said projections each pass 5 over one of said pairs of holes during rotation of said cam and a removable pin for insertion in any one of said pairs of holes for cooperation with said projections whereby the degree of rotation of said cam and the extent of throw of the key may be varied.

Landscapes

  • Telephone Set Structure (AREA)
  • Push-Button Switches (AREA)
US534420A 1944-05-06 1944-05-06 Telephone key Expired - Lifetime US2410062A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE475396D BE475396A (en(2012)) 1944-05-06
US534420A US2410062A (en) 1944-05-06 1944-05-06 Telephone key
GB8640/45A GB592519A (en) 1944-05-06 1945-04-07 Telephone switching key
FR928660D FR928660A (fr) 1944-05-06 1945-12-27 Clés téléphoniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US534420A US2410062A (en) 1944-05-06 1944-05-06 Telephone key

Publications (1)

Publication Number Publication Date
US2410062A true US2410062A (en) 1946-10-29

Family

ID=24129945

Family Applications (1)

Application Number Title Priority Date Filing Date
US534420A Expired - Lifetime US2410062A (en) 1944-05-06 1944-05-06 Telephone key

Country Status (4)

Country Link
US (1) US2410062A (en(2012))
BE (1) BE475396A (en(2012))
FR (1) FR928660A (en(2012))
GB (1) GB592519A (en(2012))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541336A (en) * 1948-08-23 1951-02-13 Automatic Elect Lab Secretary's answering key cabinet
US2560324A (en) * 1948-10-09 1951-07-10 Standard Telephones Cables Ltd Switching key with roller actuating means

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE534383A (en(2012)) * 1953-12-24

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541336A (en) * 1948-08-23 1951-02-13 Automatic Elect Lab Secretary's answering key cabinet
US2560324A (en) * 1948-10-09 1951-07-10 Standard Telephones Cables Ltd Switching key with roller actuating means

Also Published As

Publication number Publication date
FR928660A (fr) 1947-12-04
BE475396A (en(2012))
GB592519A (en) 1947-09-19

Similar Documents

Publication Publication Date Title
US2410062A (en) Telephone key
GB1490359A (en) Control device for operating a plurality of sets of electrical switch contacts
US2270951A (en) Switch
GB738422A (en) Improvements relating to plunger- or push-button-operated electric switches
US1889175A (en) Control device
US2156024A (en) Electric switch
US3183335A (en) High pressure contact switch with rotatable locking means
US1232793A (en) Electric switch.
US2899523A (en) Contactor retarder
US2355457A (en) Mechanism for electric switches
US2670415A (en) Limit switch
US2647964A (en) Switching apparatus
US1970432A (en) Switch operating mechanism
US3076063A (en) Switching keys with cam follower means
US2750477A (en) Switch
US2290453A (en) Electrical key switching device
US2560324A (en) Switching key with roller actuating means
US1519924A (en) Electric switch
GB840397A (en) Moisture proof electric tumbler switch
US2247231A (en) Electric switch
US1787058A (en) Switch
US2545548A (en) Switch
US1970828A (en) Switch
GB861862A (en) Improvements in snap-action mechanisms
US1326619A (en) Burton w