US2448647A - Calling device - Google Patents

Calling device Download PDF

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Publication number
US2448647A
US2448647A US706608A US70660846A US2448647A US 2448647 A US2448647 A US 2448647A US 706608 A US706608 A US 706608A US 70660846 A US70660846 A US 70660846A US 2448647 A US2448647 A US 2448647A
Authority
US
United States
Prior art keywords
casing
spring
plate
hub
driving spring
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
US706608A
Other languages
English (en)
Inventor
Fredric E Wood
Gienger Fred
Decker Erik
Robert L Sargisson
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric 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
Priority to BE476996D priority Critical patent/BE476996A/xx
Priority to FR954562D priority patent/FR954562A/fr
Application filed by Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Priority to US706608A priority patent/US2448647A/en
Application granted granted Critical
Publication of US2448647A publication Critical patent/US2448647A/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
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y10T29/49922—Overedge assembling of seated part by bending over projecting prongs

Definitions

  • the present -invention relates 'Ito calling devices of the impulse transmitting type' andmore par- -ticularly to improvements in calling devices of the character disclosed in U. S. Patent No.1 ⁇ ,642, 822, Herbert F. -ObergfelL granted September 20, 192'7.
  • the calling ldevice disclosed in :the Obergfell patent mentioned comprises, among ⁇ other el'ements, :a substantially cup-shaped casing carrying certain other rparts including lugs, tabs yand brackets on the bottom thereof; to which other elements, including a set of impulse spring contacts, a set of cam spring contacts, a speed governor, etc., ⁇ are secured in position' below the casing.
  • This cup-shaped lcasing ⁇ supports Iother various ymechanisms of -t'he device, including the usual linger hold dial, the usual numberl plate, and the ratchet and pawl 4mechanism for controlling the impulse spring contacts through suitable gearing.
  • the linger whole 4dilal and the ratchet and lpaw] mechanism are rotatably mounted in a -hub which is staked to the cupshaped easing.
  • an improved calling device which is of simple and rugged construction, which may be readily assembled in a minimum ⁇ amount of time, which is inexpensive to manufacture, and which is durable.
  • Another object orf :the invention is to provide a calling device of the type noted comprising an improved die-cast casing having the necessary lugs, tabs, brackets and openings formed in.- tegrally therewith during the die-casting operation in combination withan improved rin-gstaked Iclamping arrangement whereby the softdie cast casing is rigidly held .between two ⁇ hard- CII ⁇ Fig. 4,
  • Fig. 1 fis a dronlt View, partly broken away, of a calling device embodying the lpresent invention
  • Fig, 2 is a rea-r view of the calling device shown in Fig. l
  • Fig. 3 is a cross section taken on line A-A ot'
  • Fig. 4 is a top View part-s removed, f
  • Fig. 5 is an enlarged cross section view showing the .method of assembling the hub, casing, number :plate spring and the driving spring tension lplate, l i l Fig. 6 is a cross section of the hub before the ring-staking operation. i
  • the calling- ⁇ device I0 shown is of the nge-r wheel controlled impulse transmitting type and yof the general construction and arrangement of the ⁇ calling device disclosed in the previously ⁇ mentioned Obergfell patent.
  • the ca-llin'g'device I0I comprises a substantially. cup-shaped casing ll which is formed by a con veritional die-casting operation of a relatively soft Zinc 'base alloy, a number 'lplate l2 secured 1n the open end lof casing H by the curved ends 28 and 29 of the number plate spring 21 andmech-Y of the easing .with @mais the bottom of casing l I 'by an arrangement comprising two aligning pins i8 xed to the base and projecting through lopen-ings in :the casin-g Il and by two ⁇ screws I9 ⁇ extending through capenings in ⁇ casing Il and :which are secured by the nuts Eil resting in counter depressions in casing II.
  • the mechanism housed in casing II comprises; in addition to the operating shaft previously mentioned, an impulsing shaft 2i? andlfoneeway4 drive mechanism between the operating and 1m- ⁇ pulsing shaits.
  • the inner ends-oi these. shafts. project through openings provided in the casing II
  • a fixture 33 is secured to the end ofthe op erating shaft for operating the shunt and impulsing contact springs and al cam 3e is secured tovthe impulsi-ng shaft in a manner similar to that shown in the Osergfell patent.
  • the impulsing shaft carries a worm gear which meshes with worm gear of the usual speed governor.
  • Onel end of the speed governor shaft is --journaledin a bearing which is supported by a tab 35 integrally formed with the bracket 23: and theI eas-ingv III, while the other end of the governorshait is supported in a bearing in a tab 2I which is also integrally formed with casing II.
  • casing II formed :integrally with casing II is the structure 22 upon which are mounted the usual shuntfand impulsing spring contacts of the calling device.
  • bracket 23, the tabs 2I and 35 and the structure 22 are formed integrally therewith incident to the die casting operation andthatv the necessary openings for thepins I8, screws I3, the counter recesses for nuts 20, as well as the openings for the respective shafts are allformed during the die-casting operation so that no subsequent machine operations are requiredto'vcomplete the casing II.
  • Figs. 3 to 6 inclusiva'the manner in which the casing li isfirml'y clamped between two hard metal pieces vvill'bev explained' in detail.
  • the number plate retaining springl 2l isplaced in the cup portion of: the casing and the driving spring tension pl'ate 2t is placed on the outside of casing I I with thelugs 3D and 3l extending through hole-s provided V-in thecasing iI ⁇ and the number plate spring 2l after which the lugs 38 and 3i are bent over in the position shown to assemble these members together.
  • the operation of the calling device I0 is the same asl that described for the previously mentioned Obergfell patent and need not therefore be described in detail.
  • the finger of the user isrst inserted into one of the holes I4 after whichthe finger hole dial is rotated in a counterclockwise direction until the finger engages the finger stop I6 after which, when the nger is During the initial measured movement of the dial the extensions'in the. member 33 permit the closure ofthe shunt spring contacts and the movement ofthe. impulse springcontacts to a position preparatory to operation by the impulse cam 34.
  • the impulse cam is rotated under control of the tensioned drive springfti and speedy governorto separate the impulse spring.
  • sending device a die-cast casing, a numbervplate, a number plate spring having-bentover ends for holdingsaid number platev on said casing',l a driving spring for transmitting motion, a drivingspring tension plate having lugs'for holding saiddriving spring; ears onsaidndriving spring tension plate extending throughl holes'linr said casingand said number plate spring for assembling said number plate spring, said casing and said driving spring tension..V plate; a huby extending throughfa hole ⁇ in saidi number plate spring, a hole in said casing and a hole in said driving spring tension plate; said driving spring tension plate being force-fit onA said hub, Aa shoulder on said hub abutting against said-,number plate spring, and a ringstakepressedfrom said hub against said driving spriuigv tension plate to firmly'clamp said casing between ⁇ said spring tension plate and said numbervplate spring.
  • Acalling device of the impulse transmitting type' comprisingv a die-cast casing havinga substantially cup-shaped configuration, a number plate, ,a5 ⁇ number plate spring for holding the number plate in place on said casing, a driving spring for transmitting motion, a driving spring tension plate having lugs for holding said driving spring; a hub extending through a hole in said number plate spring, a hole in said casing and a hole in said driving spring tension plate: said driving spring tension plate being forcefit on said hub, a shoulder on said hub abutting against said number plate spring, and a ringstake pressed from said hub against said driving spring tension p-late to rmly clamp said casing between said spring tension plate and said number plate spring.
  • a die-cast casing an impulse shaft, an operating shaft, a bracket cast-formed integrally with said casing ⁇ for mounting said impulse shaft, a speed governor for controlling the rotation speed of said impulse shaft, tabs castformed integrally with said bracket and casing for mounting said speed governor, impulsing spring contacts and cam spring contacts, means cast-formed integrally with said casing for mounting said impulse spring contacts and said shunt spring contacts, a number plate, a number plate spring having benti over ends for holding said number plate on said casing, a driving spring for transmitting motion to said operating shaft, a driving spring tension plate having lugs for holding said driving spring, ears on said driving spring tension plate extending through holes in said casing and holes in said number plate spring for assembling said number plate spring, said casing and said drving spring tension plate; a hub for mounting said operating shaft, said hub extending through a hole in said number plate spring, a hole in said casing and a hole in said driving spring tension plate; said hub being
  • a cup-shaped casing, a finger-hole dial plate, a driving shaft means including said shaft for rotatably mounting said dial plate kon said casing, a number plate, a number plate retaining spring for holding said number plate on said casing below said dial plate, a driving spring for rotating said dial plate, a driving spring tension plate for holding said driving spring, means for assembling said casing between said number -plate retaining spring and said driving spring tension plate, a hub for said shaft extendingthrough an opening in said number plate retaining spring, through an opening in said casing and forced-fit into an opening in said driving spring tension plate, and a ring-stake pressed from said hub against said driving spring tension plate to securely clamp said casing between said driving spring tension plate and said number plate retaining spring.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
US706608A 1946-10-30 1946-10-30 Calling device Expired - Lifetime US2448647A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE476996D BE476996A (no) 1946-10-30
FR954562D FR954562A (no) 1946-10-30
US706608A US2448647A (en) 1946-10-30 1946-10-30 Calling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US706608A US2448647A (en) 1946-10-30 1946-10-30 Calling device

Publications (1)

Publication Number Publication Date
US2448647A true US2448647A (en) 1948-09-07

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ID=24838325

Family Applications (1)

Application Number Title Priority Date Filing Date
US706608A Expired - Lifetime US2448647A (en) 1946-10-30 1946-10-30 Calling device

Country Status (3)

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US (1) US2448647A (no)
BE (1) BE476996A (no)
FR (1) FR954562A (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563581A (en) * 1951-08-07 Finger-wheel operated call trans

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1360113A (en) * 1920-11-23 kaisling
US1642822A (en) * 1924-05-15 1927-09-20 Automatic Electric Inc Calling device
US1954515A (en) * 1931-12-03 1934-04-10 Adolph I Blanc Microphone casing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1360113A (en) * 1920-11-23 kaisling
US1642822A (en) * 1924-05-15 1927-09-20 Automatic Electric Inc Calling device
US1954515A (en) * 1931-12-03 1934-04-10 Adolph I Blanc Microphone casing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563581A (en) * 1951-08-07 Finger-wheel operated call trans

Also Published As

Publication number Publication date
BE476996A (no)
FR954562A (no) 1950-01-03

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