US2315344A - Call transmitter - Google Patents

Call transmitter Download PDF

Info

Publication number
US2315344A
US2315344A US325347A US32534740A US2315344A US 2315344 A US2315344 A US 2315344A US 325347 A US325347 A US 325347A US 32534740 A US32534740 A US 32534740A US 2315344 A US2315344 A US 2315344A
Authority
US
United States
Prior art keywords
reeds
key
bars
members
call
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
US325347A
Other languages
English (en)
Inventor
Rudolph F Mallina
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
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 Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US325347A priority Critical patent/US2315344A/en
Priority to FR868230D priority patent/FR868230A/fr
Priority to US393329A priority patent/US2307537A/en
Priority to US432787A priority patent/US2352724A/en
Application granted granted Critical
Publication of US2315344A publication Critical patent/US2315344A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof

Definitions

  • This invention relates to call transmitter devices of the type used in automatic telephone systems, for example, for establishing talking connections.
  • the object of the invention is to improve the construction and operation of such devices.
  • a set of numbered key members is provided for actuating a plurality of bars in predetermined combinations for operating latch members which normally hold the reeds in pretensioned positions, the operation of such, latching members and the consequent release of the reeds being effective to cause the vibration of the latter in a magnetic field for generating current voltage ina coil connected to the telephone line for transmitting signals corresponding to the numbers represented by the operation of the key members.
  • Means operable upon the placing and removal of the telephone handset from the cradle or switchhook of the substation apparatus is provided for operating a lever mechanism, the operation of which is effective to actuate a set of switch springs and one of the key bars for causing the operation of its associated reed for transmitting a signal used for controlling the operation of switching apparatus at the telephone exchange in a manner to differentiate between the telephone call designations transmitted and the digits comprised in such designations, such lever mechanism operating a gear train under control of a governor mechanism'driven by the tension of a motor spring, to introduce a delay between different call designations.
  • Means is also provided for operating the so-called off-normal contact springs of the transmitter in timed relation to the operation of the reeds as effected by the movement of any one of the key members.
  • Fig. l is a top View
  • Fig. 2 is a top assembly view shown with the casing in section
  • Fig. 3 is a side elevation view shown with the base and the casing in section, the transmitter mechanism being shown in normal non-operated position;
  • Fig. 4 is a detail view showing the off-normal switch springs and their attuating mechanism
  • Fig. 5 is a view similar to that of Fig. 3 showing the speed governor driving mechanism in the operated position and the handset shown in dotted lines in position in the cradle of the casing;
  • Fig. 6 is a left side elevation view showing the reeds operating and releasing mechanism in normal unoperated position
  • Fig. 7 is a fragmentary View showing one of the keys partly operated
  • Fig. 8 is a view similar to Fig. 7 showing one of the keys and a latch member in the operated position, a reed being shown released;
  • Fig. 9 is a fragmentary view showing the operative combinations of the bars with the key members
  • Fig. 10 is a perspective view showing the sets of switching springs and their actuating mechaand B5 are pivotally mounted, while retractile springs such as 26 best seen in Figs. 2,10 and 11 are hooked at one of their ends to the upright extending portions 2'7. of plate 22 and their other ends to the respective keys KI, K2, K3, etc, to serve for yieldably holding these keys in their normal non-operated positions as shown in Figs. 1, 2, 3, 5, 10 and 11, the U-shaped bars Bl, B2, B3,
  • retractile springs 28 having one of their ends hooked to the upright extending portion 21 of plate 22 and their other ends to lugs 29 formed with lever members 39, 3E, 32, 33 and 34 secured to the U-shaped bars Bl, B2, B3, B4 and 135 respectively, as by rivets rt.
  • , 32, 33 and 34 is formed with similar lug portions 35 and 36 best seen in Figs. 6, 7, 8 and 11, provided for a purpose which will be hereinafter described in detail.
  • a so-called voltage generator consisting of a permanent magnet formed of two pole-pieces 40 cooperating with a plurality of screws SC for clamping a plurality of reeds El, R2, R3, R4 and R5 therebetween. These reeds extend through the central opening of a coil 5
  • Key K2 actuates the bars B2 and B3 operatively associated with the reeds R2 and R3;
  • Key K5 actuates the bars B5 and B3 operatively associated with the reeds R5 and R3;
  • Key K6 actuates the bars B2 and B4 operatively associated with the reeds R2 and R4;
  • Key K8 actuates the bars BI and B4 operatively associated with the reeds RI and R4;
  • Key K9 actuates the bars B5 and B2 operatively associated with the reeds R5 and R2;
  • the U-shaped bar B6 which is pivotally mounted on shaft 25 is held in operable relation with each of the key members KI, K2, K3, etc., by a retractile spring 45 shown in Figs. 2, 3, 4, 10 and 11 hooked at one end to an arm 46 carried by that bar and its other end hooked to the upward extending portion 21 of plate 22.
  • the arm 45 is provided with a downward extending portion 41, best seen in Fig. 4, carrying a stud 48 made of insulating material provided for actuating a set of switch springs 49 mounted in a pile-up arrangement on the plate 22 and held securely thereon by screws 53 and 5
  • the pawls aI, bI, cl, (1! and eI are pivotally mounted on similar right-angle-shaped brackets 54, best seen in Figs. 6, 7 and 8, having their horizontally disposed sides secured on the permanent magnet 40 by screws 55, while nuts 56 engaging the studs 51 also mounted on magnet 43 are provided for adjusting these pawls to permit their movement in position under the free ends of reeds RI, R2, R3, R4 and R5 when the latter are moved in their normal flexed positions as shown in Fig. 6.
  • the U-shaped bar B5 carries an arm 5-8 shown in Figs. 2, 3, 5, 9 and 10 having its free end disposed in 'engageable relation with the arm a2 of a yoke member pivoted on a shoulder screw BI laterally extending from a flange 53 secured to the plate 22, while the opposite arm (13 of this yoke is disposed in operable relation with an arm 52 formed with a pivoted plate 53 operated by gravity against the tension of a retractile spring 69 upon the placing of the telephone handset on the ends of studs 54 and 65 shown in Figs. 1, 3, 5 and 6 extending in bearings in the cradle CF of a casing 2i which in cooperation with the base 20 serves for housing the transmitter mechanism,
  • the plate 63 being pivoted on a shaft 61 supported at both ends by a bracket 65 securely mounted on studs 68 laterally extending from the base 20.
  • the yoke member in addition to arms (22 and a3 is formed with a downwardly extending arm a4 operatively engaging a lever member I3 mounted on a shaft II.
  • This shaft is journaled at one end on the flange 60 and at its other end in a plate I2 extending perpendicularly to plate 22 and secured thereto by screws I3 shown in Figs.
  • gear sector I4 meshing with the pinion I5 mounted on a shaft I6 for rotation with a gear 11, in turn engaging a pinion I8, mounted on a shaft I9, for rotating a fan-wheel serving as a speed governor for controlling the operation of gear sector I4 as effected by a spring 8i having one end connected to an arm :15 of the yoke and its other end connected to a lug 83 formed with the gear sector I4 and tensioned by the pivotal movement of plate 63 upon the placing of the telephone handset in its cradle and the conconsequent operation of plungers 64 and 65 as above described, the rotation of gear sector I4 from the position shown in Fig. 3 to the position shown in Fig. 5 being effective to actuate the switch springs 84 to perform switching operations so as to permit the automatic switches at the telephone exchange to operate in a manner to distinguish between digits and complete call designations transmitted.
  • arm I0 permits the contact spring 84A to open its upper contacts and close its lower contacts under the medium of its own tension while the yoke through its arm (12 permits the upward movement of arm 58 and, therefore, the movement of U-shaped bar B5 as effected by its retractile spring 23 from the position shown in Fig. 5 to the position shown in Fig. 3 for tensioning its associated reed eI prior to the operation of any one of the key members KI, K2, K3, etc.
  • the operation of key K3 for transmitting the letter E, the first digit of the call designation EH3-4627 above-mentioned is effective to impart a small angular movement to U-shaped bar BI carrying lever 34 and to bar B3 carrying lever 32.
  • contact springs 84 being to permit the automatic switch controlled thereby to return to nor mal position preliminary to a succeeding call transmitting operation.
  • a call transmitter device for a telephone desk set comprising a handset, plunger members, a pivoted plate actuated by the placing of the handset on the plunger members, in combination with a set of manually operable key members for the transmitter, a plurality of vibrative reeds, a plurality of means actuated in predetermined combinations by the operation of said key members to cause the operation of said reeds, a set of ofi-normal contact springs, a lever mechanism operated by the placing of the handset on the plunger members for actuating the contact springs and one of said reeds independently of the operation of its associated key member, a gearing mechanism actuated by said lever mechanism, and a speed governor. operatively connected to said gear mechanism for producing a time delay between the operation of the lastmentioned reed and the operation of said contact springs.
  • a call transmitter device for a telephone desk set comprising a handset, plunger members, a pivoted plate actuated by the placing of the handset on the plunger members, in combination with a set of manuallyoperable key members for the transmitter, a plurality of vibrative elements, a plurality of means actuated in predetermined combinations by the operation of said key members to cause the operation of said elements, a set of contact springs, a lever mechanism operated by the placing of the handset on the plunger members for actuating the contact spring and one of said elements independently of the operation of its associated key member, a motor spring tensioned by the operation of said lever mechanism, a governor mechanism actuated by the tension of said motor spring for'retarding the operation of the contact springs relative to the operation of said element by one of said means, said lever mechanism comprising a lever carried by the last-mentioned means, a pivoted yoke having an arm engaging said lever and its other arm engaging said pivoted plate, a third arm disposed in operative relation with said governor
  • a call transmitter device having a set of onnormal switch springs, a set of manually operable

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Telephone Set Structure (AREA)
  • Lock And Its Accessories (AREA)
US325347A 1940-03-22 1940-03-22 Call transmitter Expired - Lifetime US2315344A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US325347A US2315344A (en) 1940-03-22 1940-03-22 Call transmitter
FR868230D FR868230A (fr) 1940-03-22 1940-12-20 Dispositifs transmetteurs d'appels
US393329A US2307537A (en) 1940-03-22 1941-05-14 Telephone call transmitter
US432787A US2352724A (en) 1940-03-22 1942-02-28 Call transmitter

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US325347A US2315344A (en) 1940-03-22 1940-03-22 Call transmitter
US393329A US2307537A (en) 1940-03-22 1941-05-14 Telephone call transmitter
US432787A US2352724A (en) 1940-03-22 1942-02-28 Call transmitter

Publications (1)

Publication Number Publication Date
US2315344A true US2315344A (en) 1943-03-30

Family

ID=42664849

Family Applications (3)

Application Number Title Priority Date Filing Date
US325347A Expired - Lifetime US2315344A (en) 1940-03-22 1940-03-22 Call transmitter
US393329A Expired - Lifetime US2307537A (en) 1940-03-22 1941-05-14 Telephone call transmitter
US432787A Expired - Lifetime US2352724A (en) 1940-03-22 1942-02-28 Call transmitter

Family Applications After (2)

Application Number Title Priority Date Filing Date
US393329A Expired - Lifetime US2307537A (en) 1940-03-22 1941-05-14 Telephone call transmitter
US432787A Expired - Lifetime US2352724A (en) 1940-03-22 1942-02-28 Call transmitter

Country Status (2)

Country Link
US (3) US2315344A (fr)
FR (1) FR868230A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416713A (en) * 1943-07-30 1947-03-04 Bell Telephone Labor Inc Call transmitter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE466584A (fr) * 1944-04-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416713A (en) * 1943-07-30 1947-03-04 Bell Telephone Labor Inc Call transmitter

Also Published As

Publication number Publication date
US2352724A (en) 1944-07-04
FR868230A (fr) 1941-12-24
US2307537A (en) 1943-01-05

Similar Documents

Publication Publication Date Title
US2315344A (en) Call transmitter
US2386486A (en) Call transmitter
US2147710A (en) Call transmitter
US2412624A (en) Telephone call transmitter
US2307521A (en) Call transmitter
US2329466A (en) Call transmitter
US2395269A (en) Impulse transmitting device
US2306068A (en) Call transmitter
US1049537A (en) Selector.
US913183A (en) Telegraph transmitting-machine.
US1154250A (en) Operator's calling device.
US2473438A (en) Call transmitter
US2368104A (en) Impulse sender for use in telephone or like systems
US1035354A (en) Signal-transmitter.
US784557A (en) Telephone-call.
US2374082A (en) Telephone call transmitter
US679029A (en) Calling device for telephone-exchanges.
US238833A (en) Electric call-bell
US2352723A (en) Call transmitter
GB117170A (en) Improvements in Selective Signalling Systems and Selectively Operable Devices therefor.
US1400050A (en) Signaling system
US1035355A (en) Telephone-support.
US2127569A (en) Desk telephone
US958248A (en) Telephone system.
US1068972A (en) Register for telephone-calls.