US2485818A - Telephone key with bisecting plate - Google Patents

Telephone key with bisecting plate Download PDF

Info

Publication number
US2485818A
US2485818A US705340A US70534046A US2485818A US 2485818 A US2485818 A US 2485818A US 705340 A US705340 A US 705340A US 70534046 A US70534046 A US 70534046A US 2485818 A US2485818 A US 2485818A
Authority
US
United States
Prior art keywords
mounting
fastening
fastening portion
lying
springs
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
US705340A
Other languages
English (en)
Inventor
Dorjee Hendrik
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2485818A publication Critical patent/US2485818A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B75/00—Frames, stands, tables, or other furniture adapted to carry sewing machines
    • D05B75/02—Frames, stands, tables, or other furniture adapted to carry sewing machines for drop-head sewing machines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • H01H1/28—Assembly of three or more contact-supporting spring blades

Definitions

  • This invention relates to a telephone key comprising a control-lever, which projects from the surface of attachment and is rotatable about a spindle supported by this surface, and atleast one set of springs which is mounted on a mounting plate normal to the surface of attachment.
  • the frame consists of" an L-shaped metal strip, the two limbs of which form the fastening and the mounting plate.
  • the object of the invention is to provide an entirely novel construction for a telephone key which has the aforesaid advantage of the conventional construction and in addition several further advantages.
  • the frame of the telephone key is constituted by a body of insulating material formed by the mounting surface, the fastening surface and a supporting surface which is normal to these two surfaces and which establishes the mechanical junction between them, the parts of the set of springs be ing arranged on either side of the supporting surface.
  • this surface has a recess in which parts of the control lever are movable.
  • the construction according to the invention enables various particularly advantageous forms of construction, owing to which the mounting is simplified and component parts are economized.
  • Fig. 1 represents the frame which is used for the construction of the telephone key according to the invention.
  • Fig. 2 represents one form of construction of the telephone key according to the invention, in which use is made of the frame shown in Fig. 1.
  • the frame shown in Fig. 1 consists of three surfaces I, 2 and 3 substantially normal to one another.
  • Surface l constitutes the fastening surface which serves to fasten the key to the wall of a cabinet or to a chassis plate, from which the control lever 4 (Fig. 2) projects.
  • the attachment of the telephone key to a wall is effected by means of metal tags 5 and 6.
  • the attachment may be effected by means of screw bolts extending through apertures of the fastening surface I.
  • the surface I furthermore comprises the bearings for the spindle I of the control lever 4.
  • the mounting surface 2 has piled on it two sets of springs 8 and 9.
  • the springs are insulated from one another by means of plates IU of insulating material, the sets being clamped together by metal end plates II and I2.
  • the plates H and I2 are interconnected by screw bolts l3 and M which are passed through apertures 15 and I6 (Fig. 1) in the surface 2.
  • the mounting surface 2 and the sets of springs attached thereto are supported by the third of the three surfaces which are normal relatively to one another, 1. e. the supporting surface 3 which establishes the mechanical junction between the mounting surface 2 and the fastening surface I.
  • Each set of springs comprises two piles of spring arranged on either side of the supporting surface 3.
  • This surface bisects the key so to say, so that the parts of the surfaces I and 2 projecting on either side have only half the total width of these surfaces.
  • the compact construction thus ensured permits, in spite of the use of insulating material instead of metal, to fulfil the mechanical requirements.
  • the supporting surface 3 about the spindle l of the control lever t exhibits a recess (in the case represented a semicircular recess) in which parts of the lever 4 are movable which will be described in detail hereinafter.
  • the frame construction described permits to economize in price and weight by the use of insulating material and in addition to obtain diverse constructional advantages.
  • the mounting surface, in effect, is provided on the rear with a dovetail profilation.
  • the insulating plates l0 and the compression plates H and I2 of the sets of springs exhibit a recess fitting this profile, so
  • the control lever is provided on either side with a roller l8 which drives the usually central springs 19 and 20 of the sets. These springs are required to be at rest in the mid-position (not shown). This is ensured most easily by arranging the mounting surface 2 mid-way the key 1. e. in such manner that the Spindle i of the lever 4 is in line with the mounting surface, the springs l9 and 23 being symmetrically mounted on either side of this surface. If the mould is given a suitable construction the mountin surface is automatically at the correct height.
  • surface 3 is provided on either side with profiled slits, in which strips 23 and 2d are secured by gluing. These strips are made of insulating material and provided with perforations which are chosen in accordance with the set of springs to be used.
  • the stationary springs of each set have a lateral projecting part by means of which they rest, under the desired preliminary tension, in one of the recesses 25 of strips 23 and 24.
  • the non-driven springs of the set are provided on either side with a projecting part, so that they can serve both on the right hand side and on the left hand side.
  • the centre of the frame exhibits, along the line of intersection of the surfaces 2 and 3, a bore 26, which accommodates a screw spring which urges a steel ball against the cylindrical surface of the member 2? of the control lever 4.
  • this ball drops precisely into the stop slit 28 provided in the said member. In this manner the control lever is blocked in the mid-position.
  • An electrical contact device comprising an electrically insulating wall portion provided with a recess at one end thereof and having a surface thereof lying in a given plane, an electrically insulating fastening portion provided with an aperture, said fastening portion having the major surface thereof lying in a plane substantially perpendicular to said first plane and being integral to said wall portion, an electrically insulating mounting portion integral to said wall portion and having a mounting surface thereof lying in a plane substantially perpendicular to the planes of said wall portion and said fastening portion, a spring-contact assembly secured to said mounting portion and having a portion thereof positioned adjacent to said supporting portion and extending towards said fastening portion, and a rotatable member pivotally secured within the aperture of said fastening portion and extending into said recess portion.
  • An electrical contact device comprising an electrically insulating Wall portion provided with a recess at one end thereof and having a surface thereof lying in a given plane, an electrically insulating fastening portion provided with an aperture, said fastening portion having the major surface thereof lying in a plane substantially perpendicular to said first plane and being integral to said wall portion, an electrically insulating mounting portion integral to said wall portionand having a mounting surface thereof lying in a plane substantially perpendicular to the planes of said wall portion and said fastening portion, said supporting portion substantially bisecting the said mounting surface, a spring-contact assembly secured to said mounting portion and having a portion thereof positioned adjacent to said supporting portion and extending towards said fastening portion, and a rotatable member pivotaily secured within the aperture of said fastening portion and extending into said recess portion.
  • An electrical contact device comprising an electrically insulating wall portion provided with a recess at one end thereof and having a surface thereof lying in a given plane, an electrically insulating fastening portion provided with an aperture, said fastening portion having the major surface thereof lying in a plane substantially perpendicular to said first plane and being integral to said wall portion, an electrically insulating mounting portion integral to said wall portion and having a mounting surface thereof lying in a plane substantially perpendicular to the planes of said wall portion and said fastening portion, said supporting portion substantially bisecting the said mounting surface, spring-contact assemblies respectively secured to said mounting portion and having portions thereof positioned adjacent to said supporting portion and extending towards said fastening portion, and a rotatable member pivotally secured within the aperture of said fastening portion and extending into said recess portion.
  • An electrical contact device comprising an electrically insulating wall portion provided with a recess at one end thereof and having a surface thereof lying in a given plane, an electrically insulating fastening portion provided with an aperture, said fastening portion having the major surface thereof lying in a plane substantially perpendicular to said first plane and being integral to said wall portion, an electrically insulating mounting portion integral to said Wall portion and having a mounting surface thereof lying in a plane substantially perpendicular to the planes of said wall portion and said fastening portion, said supporting substantially bisecting the said mounting surface, spring-contact assem blies respectively secured to the bisected portions of the said mounting portion and having portions thereof positioned adjacent to said supporting portion'and extending towards said fastening portion, and a rotatable member pivotally secured within the aperture of said fastening portion and extending into said recess portion.
  • An electrical contact device comprising an electrically insulating wall portion provided with a recess at one end thereof and having a recessed surface thereof lying in a given plane, an insulating electrically fastening portion provided with an aperture, said fastening portion having the major surface thereof lying in a plane substantially perpendicular to said first plane and being integral to said wall portion, an electrically insulating mounting portion integral to said wall portion and having a mounting surface thereof lying in a plane substantially perpendicular to the planes of said wall portion and said fastening portion, a spring-contact assembly secured to said mounting portion and having a portion thereof positioned adjacent to said supporting portionand extending towards said fastening portion, and a rotatable member pivotally secured within the aperture of said fastening portion and extending into said recess portion, certain spring portions of the'said assembly being provided with projections extending into the said recessed sur- UNITED STATES PATENTS face Of the Wan portion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
US705340A 1945-08-28 1946-10-24 Telephone key with bisecting plate Expired - Lifetime US2485818A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2485818X 1945-08-28

Publications (1)

Publication Number Publication Date
US2485818A true US2485818A (en) 1949-10-25

Family

ID=19874387

Family Applications (1)

Application Number Title Priority Date Filing Date
US705340A Expired - Lifetime US2485818A (en) 1945-08-28 1946-10-24 Telephone key with bisecting plate

Country Status (2)

Country Link
US (1) US2485818A (uk)
NL (3) NL120914C (uk)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012117A (en) * 1957-02-28 1961-12-05 Bernier Raymond Mounting for the fixed contacts and the terminals of an electromagnetic relay
US3604975A (en) * 1968-04-29 1971-09-14 Tokai Rika Co Ltd Vehicle light control system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US836067A (en) * 1902-06-20 1906-11-13 Kellogg Switchboard & Supply Operator's ringing and listening key.
US918682A (en) * 1907-07-29 1909-04-20 Stromberg Carlson Telephone Switchboard-signal.
US1109919A (en) * 1914-02-10 1914-09-08 Western Electric Co Switch-key.
US1333117A (en) * 1915-06-23 1920-03-09 Kellogg Switchboard Ringing and listening key
US1763006A (en) * 1927-09-12 1930-06-10 Bell Telephone Labor Inc Telephone-exchange equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US836067A (en) * 1902-06-20 1906-11-13 Kellogg Switchboard & Supply Operator's ringing and listening key.
US918682A (en) * 1907-07-29 1909-04-20 Stromberg Carlson Telephone Switchboard-signal.
US1109919A (en) * 1914-02-10 1914-09-08 Western Electric Co Switch-key.
US1333117A (en) * 1915-06-23 1920-03-09 Kellogg Switchboard Ringing and listening key
US1763006A (en) * 1927-09-12 1930-06-10 Bell Telephone Labor Inc Telephone-exchange equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012117A (en) * 1957-02-28 1961-12-05 Bernier Raymond Mounting for the fixed contacts and the terminals of an electromagnetic relay
US3604975A (en) * 1968-04-29 1971-09-14 Tokai Rika Co Ltd Vehicle light control system

Also Published As

Publication number Publication date
NL62507C (uk)
NL281678A (uk)
NL120914C (uk)

Similar Documents

Publication Publication Date Title
US3339161A (en) Electromagnetic contactor
US2419072A (en) Electric switch
US2468673A (en) Switch operating mechanism
GB1178135A (en) Multi-Pole Electromagnetic Relay with Convertible Contacts
US2485818A (en) Telephone key with bisecting plate
US2398657A (en) Relay
US2546001A (en) Auxiliary contact assembly
GB972564A (en) Improvements in or relating to surge diverters
US2609462A (en) Polarized relay
US3042775A (en) Relay
US2488669A (en) Electrical contact device
US3474367A (en) Relay motor
US2235861A (en) Electromagnetic relay
US3560901A (en) Electromagnetic relay
US2831939A (en) Electromechanical relay
US2405319A (en) Relay
US2106588A (en) Electric receptacle
US3047691A (en) Built-up polarized relay
US2856483A (en) Polarized relay
US3639866A (en) Constant actuating force arrangement for a relay and a relay-adder combination
US3368171A (en) Electric control devices with mechanical interlock
GB976278A (en) Rectifier stack, especially power rectifier stack
GB1371422A (en) Switch construction
US2422396A (en) Balanced relay
US2172673A (en) Electric snap switch construction