US2485574A - Telephone handset - Google Patents

Telephone handset Download PDF

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Publication number
US2485574A
US2485574A US586861A US58686145A US2485574A US 2485574 A US2485574 A US 2485574A US 586861 A US586861 A US 586861A US 58686145 A US58686145 A US 58686145A US 2485574 A US2485574 A US 2485574A
Authority
US
United States
Prior art keywords
handset
spring
support
telephone
contact
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
US586861A
Other languages
English (en)
Inventor
Deakin Gerald
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 BE469339D priority Critical patent/BE469339A/xx
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to US586861A priority patent/US2485574A/en
Priority to ES0181831A priority patent/ES181831A1/es
Application granted granted Critical
Publication of US2485574A publication Critical patent/US2485574A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/04—Supports for telephone transmitters or receivers
    • H04M1/06—Hooks; Cradles

Definitions

  • This invention relates to telephone apparatus andmore particularly to telephone handsets of the unitary transmitter and receiver kind.
  • the circuit control buttons are completely exposed. Conse-- quently, if accidentally the buttons should bedepressed, the disconnect signal may be given at the central ofiice,'-and in the case of automatic oflices, a complete breakdown of the previouslyestablished connection may ensue. Thirdly, since the handset is supported on two relatively small buttons, it is capable of considerable sliding motion on the support, and if the support is not level, it may cause unequal loads on the two buttons and the associated spring sets. Furthermore, if during conversation the subscriber wishes to give the disconnectsignal, he must either replace the entire handset on the support, or manually depress the-buttons in the support.
  • one of the main objects of the present invention is to overcome the above-noted and other disadvantages whichexist in the usual handset type of telephone subscribers subset.
  • a feature of the invention relates to a telephone handset wherein the circuit control contact spring assembl is mounted within the hand. grip portion of the handset, and the. associated line loop is automatically completed merely by lifting the handset from its support.
  • Another feature relates to a telephone subset comprising a supporting housing for the handset, which housing can be completely closed against the ingress of dust or moisture which is not possible where the housing has one or more springpressed slidable buttons.
  • Another feature relates to a telephone subset wherein the handset carries the microphone, receiver and control contact assembly, and is projacent the spring assembly.
  • the support upon which the handset rests when not in use, is provided with one or more projections or knobs which are arranged to register with the said openings to move the contact springs to the non-talking position.
  • a further feature relates to the novel organization, arrangement and relative location of parts which cooperate to provide a more efficient telephone subscribers subset.
  • Fig. 1 is a front view of a telephone subset embodying the inventive concept. In this view the handset is partly broken away to show the interior arrangement more clearly.
  • Fig. 2 is a transverse sectional view of Fig. l taken'along the line 22 thereof.
  • Fig. 3 is a schematic circuit diagram showing the wiring connections of the handset of Figs. 1 and 2.
  • Fig. 4 is another view of part of Fig. 1.
  • a telephone subscribers substation set comprising a support or housing I of suitable material, and which is adaptedto. enclose the usual ringer and inductioncoil'units.
  • the upper face of housing I is provided with a channeled standard or cradle 2 having parallel lateral ribs 3, 4, and a pair of knobs or projections 5, 6 located in alignment centrally of the housing I.
  • the wiring to the several units within the housing I can be made by a suitable'fiexible cable I which may extend through a side wall of the housing, and the opening may be provided with a suitable bushing or washer to prevent ingress of dust or moisture.
  • the base of housing I may be closed with a suitable dust-proof and moisture-proof cover plate 8.
  • a telephone handset which may be of any well-known construction such as employed quite generally in socalled French models of subscribers subsets. It comprises a hollow housing having a comparatively constricted portion 9 which terminates in substantially cylindrical end portions II], II.
  • suitable microphone of any well-known construction is mounted within portion I0, and any wellknown construction of telephone reproducer or receiver is mounted within portion II.
  • a suitable perforated closure member I2 forming the mouthpiece is threaded onto portion I0, and a suitable perforated earpiece I3 is threaded onto portion II.
  • the lower wall I4 of the hand grip portion 9 is provided with twospaced openings I5, IS with which the projections 5 and B are adapted to register when the handset is placed on support I.
  • the openings I5 and I6 are preferably of the same contour as the cross-sectional contour of projections 5 and 6, and the said projectionsare sufiiciently long so that when the handset rests on cradle 2, as shown in Fig. l, the projections pass through the wall I4 for thepurpose to be described.
  • the openings I5, I6 are appreciably larger in transverse dimensions than the projections 5, 6, was to enable the handset to be readily placed in proper position on cradle 2.
  • a contact spring pile-up comprising a pair of adjacent spaced and relatively narrow contact springs I1, I8 and a relatively wide contact spring I9 whose free end is bent back upon itself to provide a contact face which overlies the adjacent contact ends of springs II, I8.
  • the spings at their righthand ends are supported and fastened, in the usual manner, between suitable insulator strips, to form a contact pile-up.
  • This pile-up also includes a spring finger 20 which is normally biassed downwardly to engage the wall I4 as shown in Fig. 4.
  • the free end 2I of spring 20 is bent as shown, to provide a smoothly-curved face where it engages the spring I 9, it being understood that the spring 20 is out of contact with spring I9 but spring I9 is normally in contact engagement with the adjacent ends of springs I'I, I8, as shown in Fig. 4.
  • the main length of spring 20 is flat and is sufficiently wide to completely close off the opening I5. This bent end is however slightly foreshortened with respect to opening I5, so thatv when the spring 20 is in its normal position, as shown in Fig. 4, the lip 22 lies flush with theinner surface of wall I4, thus completely closing off that opening. However, the spring 20 does not extend outwardly beyond the wall I4.
  • the manner of connecting the microphone and receiver units to the several contact springs is schematically shown in Fig. 3.
  • the lip 22 of spring 20 may carry an insulating button 23, if the springs I9 4 and 2
  • the handset when the handset is not in use it rests on cradle 2 whereby one of the projections 5 or 6 engages the spring 20 which presses the spring I9 upwardly to open the circuit between contacts II, I8 and I9.
  • the spring I9 returns to normal and closes the circuit between IT, I8 and I9, thus connecting the transmitter and receiver units in the talking circuit.
  • the opening I5 is' located conveniently for insertion of the finger to operate spring 20 to give the disconnect signal.
  • the subscriber is connected vto a manual operator's switchboard the subscriber can flash in the operator by inserting a finger in the hole I5 and depressing spring 2 I.
  • the drawing shows a single set of contact springs adjacent opening I5, it will be understood that a similar set of springs may be provided adjacent opening l6.
  • the opening I6 may be provided-with a re-entrant cover if only one set of springs is used.
  • the portion of the wall I4 to which the spring assembly is fastened may be in the form of a removable plate to facilitate the assembly and wiring within the handset.
  • a telephone handset comprising, a hollow member having a hand grip portion intermediate its ends and carrying transmitter and receiver units at opposite ends, a support for said handset, said support having a pair of projections, a contact spring assembly within'said hand grip .por-' tion, said hand grip portion having a pair of openings in the wall thereof adapted to register with said pair of projections on said support for controlling the position of said contact springs.
  • a housing enclosing telephone units
  • a unitary handset comprising transmitter and receiver units and a contact spring assembly on the interior thereof, said handset having a pair of openings therein adjacent to said assembly, a pair of rigid spaced projections on said housing arrangedto register with and protrude through said openings in said handset when the said handset is not in use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
US586861A 1945-04-06 1945-04-06 Telephone handset Expired - Lifetime US2485574A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE469339D BE469339A (ru) 1945-04-06
US586861A US2485574A (en) 1945-04-06 1945-04-06 Telephone handset
ES0181831A ES181831A1 (es) 1945-04-06 1948-01-24 Mejoras en microteléfonos

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US586861A US2485574A (en) 1945-04-06 1945-04-06 Telephone handset

Publications (1)

Publication Number Publication Date
US2485574A true US2485574A (en) 1949-10-25

Family

ID=24347388

Family Applications (1)

Application Number Title Priority Date Filing Date
US586861A Expired - Lifetime US2485574A (en) 1945-04-06 1945-04-06 Telephone handset

Country Status (3)

Country Link
US (1) US2485574A (ru)
BE (1) BE469339A (ru)
ES (1) ES181831A1 (ru)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049597A (en) * 1957-07-01 1962-08-14 John C Tapio Telephone sterilizer
US3073911A (en) * 1960-05-11 1963-01-15 Bell Telephone Labor Inc Telephone set
US4151467A (en) * 1976-10-18 1979-04-24 Rca Corporation Switched microphone hang-up bracket
US4837819A (en) * 1987-12-08 1989-06-06 Northern Telecom Limited Security handset
US4942605A (en) * 1987-12-08 1990-07-17 Northern Telecom Limited Security handset

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1830035A (en) * 1930-07-11 1931-11-03 Louis J Loeffler Telephone hand set
US1918801A (en) * 1931-10-22 1933-07-18 Charles H J Dilg Telephone set

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1830035A (en) * 1930-07-11 1931-11-03 Louis J Loeffler Telephone hand set
US1918801A (en) * 1931-10-22 1933-07-18 Charles H J Dilg Telephone set

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049597A (en) * 1957-07-01 1962-08-14 John C Tapio Telephone sterilizer
US3073911A (en) * 1960-05-11 1963-01-15 Bell Telephone Labor Inc Telephone set
US4151467A (en) * 1976-10-18 1979-04-24 Rca Corporation Switched microphone hang-up bracket
US4837819A (en) * 1987-12-08 1989-06-06 Northern Telecom Limited Security handset
US4942605A (en) * 1987-12-08 1990-07-17 Northern Telecom Limited Security handset

Also Published As

Publication number Publication date
ES181831A1 (es) 1948-03-01
BE469339A (ru)

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