US3855438A - Arrangement for the operation of switching devices in telephone equipment - Google Patents

Arrangement for the operation of switching devices in telephone equipment Download PDF

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Publication number
US3855438A
US3855438A US00399270A US39927073A US3855438A US 3855438 A US3855438 A US 3855438A US 00399270 A US00399270 A US 00399270A US 39927073 A US39927073 A US 39927073A US 3855438 A US3855438 A US 3855438A
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US
United States
Prior art keywords
housing
areas
arrangement
intermediate member
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
Application number
US00399270A
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English (en)
Inventor
H Schinke
K Breu
H Hoher
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens 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
Application filed by Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US3855438A publication Critical patent/US3855438A/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
    • H04M1/08—Hooks; Cradles associated with switches operated by the weight of the receiver or hand-set

Definitions

  • the invention relates to an arrangement for the mechanical transfer of an operating force to a switching mechanism disposed within a housing.
  • the invention has particular application in the operation of switching devices in telephone subscriber sets.
  • the prior art devices generally employ mechanical intermediate members which penetrate the housing of the switching device and as movable rectilinearly between two extreme positions in a guide and accessible from the outside.
  • the switching devices disposed in the interior of a telephone set are operated by such intermediate members.
  • the intermediate members are operated through specified areas of a telephone handset replaced on the device, such that the force of gravity is utilized.
  • the mechanical intermediate members provided in pairs are easilymovable and extend through openings of the housing of the device. In their parallel axes of rotation they interact within the device with a control mechanism which is a part of the switching device.
  • the intermediate members are separated a great distance from one another, depending on the length of the handset.
  • the control mechanism of the switching device extends into the paths of travel of the two intermediate members at the same time.
  • the guide openings in the housing of the device in which the intermediate members move should be adequately large to'enable a low-friction movement.
  • the possibility, however, of dust and other foreign matter entering such openings limits the use of the'frict'ion preventing arrangement.
  • the usual construction does provide a proportioning such that ample play of the intermediate members in the housing openings is possible.
  • amply proportioned housing openings promote the penetration of dust and impurities into the interior of the device; In the prior art arrangements both the penetrating dust and liquid cleansers used to remove the dust can be deposited on the working surfaces of the aforementioned power transmission means interacting with the intermediate members.
  • the power transmission means normally perform an apparently rectilinear movement. In reality, however, they are seated on an axis of rotation, and the movement of their working surfaces interacting with the intermediate members is part of a circular orbit.
  • an object of the invention to provide a structural arrangement for transmitting an activating force to a switching mechanism disposed within a housing of a device wherein the force must be transmitted through openings in a housing and wherein the deposting of dust in the openings in the interior of the housing increases friction and accelerates wear of the mechanism in which such effects are prevented.
  • the mechanical intermediate members have two physically separated areas for absorbing the activating force and for transmitting the same.
  • the parallel axes of rotation of these two areas are laterally staggered.
  • Axes of rotation are understood to means the axes determined by the paths of travel described by the centers of gravity of the areas considered separately of an intermediate member.
  • the opening in the wall of the housing renders possible the passage of the area of the mechanical intermediate member absorbing the activating force into the area of influence of the activating force.
  • the guideway for the mechanical member can member can be laid in the path of travel of its area absorbing the activating force as well as transmitting the same.
  • the opening in the wall of the housing through whichthe mechanical intermediate member extends outwardly does not lie directly above the area employed for the transmission of the activating force.
  • the arrangement according to the invention also has the advantage that the size of the power transmitting member of the switching device, heretofore determined by the distance, can be reduced to the smaller distance (determined by this arrangement) of the areas transmitting the force and interacting with the power transmitting member.
  • the lateral displacement according to the invention between an axis absorbing an activating force and an axis parallel thereto and transmitting the activating force leads in the guideway to a resolution of the activating force.
  • the shearing force occurring exercises a torque thereat and may cause an unwanted increase of the friction in the guideway. This can be equalized by the transition from sliding friction to rolling friction being inserted into the housing of the device from the bottom and is prevented, by a spring-loaded barb 15, from falling out of the housing, particularly during the assembly.
  • the means employed for receiving and guidy Virtue of the fact that the guide is constructed as a ing an intermediate member can, as well, be part of the rolling element guide.
  • FIG. 1 is a partial view of an arrangement according to the invention viewed in horizontal direction and partially in section.
  • FIG. 2 is a side elevation of the FIG. 1 arrangement, likewise partially in section.
  • An area 12 of a mechanical intermediate member 1, constructed according to the invention absorbs the activating force and extends outwardly in any amply dimensioned opening 13 through the wall of the housing 4 into the area of influence of the activating force P (arrow).
  • Area 5 of the intermediate member transmits the activating force and has an axis of rotation 6, as center of gravity of the intermediate member which ex tends through the axis.
  • This member includes a projection 2 used as a guide into a channel 3 formed in the housing and it extends as far as the working surface 7 of a power transferring arm 9 associated with a switching device 8.
  • the power transferring arm 9 is capable of operating in a pivoting motion in the form of a circular arc about an axis 18 and being held in its rest position by a restoring spring 10. Both areas of the mechanical intermediate member are regidly connected with one another by a cross member l4.-
  • the mechanical intermediate member is capable of I housing frame.
  • the guide 2 of the mechanical intermediate member is constructed to be a rolling element, by means of rollers 16 received in recesses 17 of the channel area.
  • first and second areas on said intermediate member means for absorbing said externally applied force, and transmitting it, said first and second areas being physically separated from each other, said first and second areas having axes of rotation, respectively in a laterally staggered spatial relationship with respect to each other.
  • the improved apparatus defined in claim 1 further comprising channel means for receiving a portion of said intermediate member means and roller means for carrying said portion through said channel means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Bearings For Parts Moving Linearly (AREA)
US00399270A 1972-09-25 1973-09-20 Arrangement for the operation of switching devices in telephone equipment Expired - Lifetime US3855438A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2246993A DE2246993C2 (de) 1972-09-25 1972-09-25 Anordnung zur Betätigung von Umschalteinrichtungen in Fernsprechgeräten

Publications (1)

Publication Number Publication Date
US3855438A true US3855438A (en) 1974-12-17

Family

ID=5857321

Family Applications (1)

Application Number Title Priority Date Filing Date
US00399270A Expired - Lifetime US3855438A (en) 1972-09-25 1973-09-20 Arrangement for the operation of switching devices in telephone equipment

Country Status (7)

Country Link
US (1) US3855438A (enrdf_load_stackoverflow)
AT (1) AT325116B (enrdf_load_stackoverflow)
CH (1) CH560997A5 (enrdf_load_stackoverflow)
DE (1) DE2246993C2 (enrdf_load_stackoverflow)
FR (1) FR2200710B1 (enrdf_load_stackoverflow)
GB (1) GB1439623A (enrdf_load_stackoverflow)
IT (1) IT993266B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3311684A1 (de) * 1983-03-30 1984-10-11 Siemens AG, 1000 Berlin und 8000 München Lagerung der den gabelumschalter betaetigenden schaltleiste in einer fernsprechteilnehmerstation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2165693A (en) * 1937-01-25 1939-07-11 Theodore D Bross Radio control device
US2272474A (en) * 1938-07-22 1942-02-10 Associated Electric Lab Inc Telephone substation apparatus
US2546070A (en) * 1946-09-26 1951-03-20 Automatic Elect Lab Plunger release lever
US3387102A (en) * 1963-11-29 1968-06-04 Ass Elect Ind Subscriber's telephone instruments

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2165693A (en) * 1937-01-25 1939-07-11 Theodore D Bross Radio control device
US2272474A (en) * 1938-07-22 1942-02-10 Associated Electric Lab Inc Telephone substation apparatus
US2546070A (en) * 1946-09-26 1951-03-20 Automatic Elect Lab Plunger release lever
US3387102A (en) * 1963-11-29 1968-06-04 Ass Elect Ind Subscriber's telephone instruments

Also Published As

Publication number Publication date
FR2200710B1 (enrdf_load_stackoverflow) 1978-09-08
CH560997A5 (enrdf_load_stackoverflow) 1975-04-15
FR2200710A1 (enrdf_load_stackoverflow) 1974-04-19
DE2246993C2 (de) 1974-06-12
IT993266B (it) 1975-09-30
DE2246993A1 (enrdf_load_stackoverflow) 1973-11-08
AT325116B (de) 1975-10-10
DE2246993B1 (de) 1973-11-08
GB1439623A (en) 1976-06-16

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