US2781666A - Dial type of impulse sender - Google Patents

Dial type of impulse sender Download PDF

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Publication number
US2781666A
US2781666A US263399A US26339951A US2781666A US 2781666 A US2781666 A US 2781666A US 263399 A US263399 A US 263399A US 26339951 A US26339951 A US 26339951A US 2781666 A US2781666 A US 2781666A
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US
United States
Prior art keywords
wheel
pawl
finger
ratchet
ratchet wheel
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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
US263399A
Inventor
James E Bosh
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.)
TDK Micronas GmbH
International Telephone and Telegraph Corp
Original Assignee
Deutsche ITT Industries GmbH
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Filing date
Publication date
Application filed by Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Priority to US263399A priority Critical patent/US2781666A/en
Priority to FR1068557D priority patent/FR1068557A/en
Priority to DEL23049A priority patent/DE1007815B/en
Priority to DEL23068A priority patent/DE1002042B/en
Priority to FR70823D priority patent/FR70823E/en
Priority to FR71354D priority patent/FR71354E/en
Application granted granted Critical
Publication of US2781666A publication Critical patent/US2781666A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/02—Sensitometric processes, e.g. determining sensitivity, colour sensitivity, gradation, graininess, density; Making sensitometric wedges
    • 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
    • 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
    • H04M1/32—Locking setting devices during transmission to prevent interference by user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/10—Metering calls from calling party, i.e. A-party charged for the communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
    • H04M17/026—Constructional features
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1558—Grip units and features
    • Y10T74/1565—Gripper releasing devices
    • Y10T74/1566—Power pawl lifter
    • Y10T74/1568—Automatic
    • Y10T74/1569—Idle stroke
    • Y10T74/1571—Cooperating holding pawl
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1558—Grip units and features
    • Y10T74/1565—Gripper releasing devices
    • Y10T74/1566—Power pawl lifter
    • Y10T74/1574—Cooperating holding pawl
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2133—Pawls and ratchets
    • Y10T74/2135—Noiseless

Definitions

  • This invention relates to a dial type of impulse sender, or calling device, such as is commonly employed in automatic telephone systems.
  • the main object of the invention is to provide a simple and reliable sender, or calling device, of this type which produces a minimum of noise in operation.
  • the invention is disclosed as applied to a calling device generally according to the Obergfell Patent No. 1,642,822, issued September 20, 1927.
  • a calling device has a tenhole finger wheel for rotating a main shaft to carry a pawl over a desired number of teeth of a ratchet wheel according to the number of pulses to be sent, When the finger wheel is released, a spring wound by the rotation drives the finger wheel back to normal position. When the return movement begins, the pawl engages the last tooth passed over, to clutch the sending mechanism with the finger wheel, thereby driving the sending mechanism.
  • a more specific object of the invention is to provide an improved pawl mechanism which avoids the noise and wear incident to the pawl passing over the teeth of the ratchet wheel during the windup movement.
  • This object is attained in the disclosed mechanism by employing a double-armed pawl having the two arms so coacting with the ratchet wheel that the desired pawl engagement is secured by a camming action, rather than by the usual spring-bias action which drops the pawl successively into the notches of the wheel with a series of hammer blows, with consequent objectionable wear and metallic clicks.
  • a special feature of the invention concerns a travelling stop member movable radially of the ratchet wheel and cooperating with a sloping fixed stop member to stop the return movement of the mechanism accurately with a minimum of hammer action and noise.
  • Fig. 1 is a front view of the device with the finger wheel removed
  • Figs. 2 to 4 are a partial front view, a side view, and a rear view of part of the mechanism appearing in Fig. 1, showing the ratchet and pawl to a better advantage.
  • Figs. 5 to 7 are additional rear views of the ratchet and pawl as the finger wheel is rotated.
  • Fig. 1 a front view, shows the calling device with the finger wheel removed.
  • the finger wheel (not shown) has a central raised portion which fits over slightly raised hub 10 on plate 12, being held in place by a screw which is threaded into aperture 11 of hub 10.
  • the plate 12 With the finger wheel installed and rotated forwardly in the usual manner as described in the cited patent, the plate 12 is rotated in the indicated clockwise direction as seen in Figs. 1 and 2, and counterclockwise as seen from the rear in Figs. 4 to 6.
  • the ratchet wheel 16 stands still while the plate 12 is rotated forwardly, and consequently pawl 21, pivotally secured toplate 12 by shoulder rivet 30, passes over the teeth of the ratchet wheel.
  • Figs. 1 shows the calling device with the finger wheel removed.
  • the finger wheel (not shown) has a central raised portion which fits over slightly raised hub 10 on plate 12, being held in place by a screw which is threaded into aperture 11 of hub 10.
  • travelling stop member 32 and frictional spring 36 also are pivotally secured to plate 12 by shoulder rivet 30.
  • Stop member 32 is provided with a cam portion 33, which engages stop arm 28 (at the completion of the return movement of the mechanism) to jam an integral brake portion 34 into en-' gagement with the sloping back portion of its associated tooth of ratchet wheel 16, to stop the mechanism in its illustrated normal position.
  • Friction spring 36 eliminates any mechanical chattering of pawl 21 to insure its free movement during the operation of thedevice.
  • Spring 36 is positioned by having its offset tip portion 37 inserted into an aperture 27 provided in pawl 21, as seen best in Fig. 3.
  • Pawl 21 extends from its fulcrum to partially encircle the ratchet wheel 16 with two integral arm portions 22 and 23.
  • the engaging arm 22, of pawl 21 engages an associated tooth of the ratchet wheel at the beginning of the return movement of the finger wheel to drive the impulse-sending mechanism.
  • the guiding arm 23 passing over the teeth of the ratchet wheel moves the engaging arm 22 into the associated notch between the teeth of wheel 16.
  • Fig. 4 shows the pawl and ratchet wheel in its normal position
  • Figs. 5 to 7 show the relationship between pawl 21 and ratchet wheel 16 as the finger wheel is rotated corresponding to the desired digit.
  • the finger wheel (not shown) is rotated by the subscriber and secured thereto is plate 12, carrying pawl 21.
  • Fig. 4 shows the ratchet and pawl in its normal position
  • Fig. 5 shows the relative position of the pawl with respect to its associated teeth of the ratchet wheel as the finger wheel is slightly rotated in a counterclockwise direction, as indicated on the drawing.
  • the forward angular portion 24 of engaging arm 22 engages the sloping back portion of tooth 17, upon further movement of the finger wheel, portion 24 moves guiding arm 23 into the notch between its associated teeth of wheel 16.
  • portion 24 moves guiding arm 23 into the notch between its associated teeth of wheel 16.
  • the finger wheel is rotated still further angular portion 26 of guiding arm 23 engages the sloping back portion of tooth 18 moving the guiding arm 23 outward thereby moving the engaging arm 22 about its fulcrum into the notch between teeth 17 and 19, as shown in Fig. 6.
  • the pawl passes over the teeth of the ratchet in the same manner as described, until the finger wheels rotationable movement is stopped by the engagement of the subscribers finger with the finger stop 15.
  • Fig. 7 The position of the pawl and ratchet wheel before the finger wheel is released is shown in Fig. 7, the guiding arm 23 has engaged the sloping back portion of its associated tooth to move the engaging arm 22 into engaging position.
  • the plate 12 and its attached pawl 21 is returned to its normal illustrated position as shown in Fig. 4.
  • Upon its return movement portion 25 of pawl 16 engages the front face of its associated tooth of ratchet wheel 16 to drive the impulse sending mechanism.
  • the engaging face of the teeth, of the ratchet wheel, and surface 25 of pawl 21 are of an angular design whereby the engagement of the two surfaces providing a camming action to force engaging portion of arm 22 still further into its associated notch.
  • cam portion 33, of stop member 32 engages the angular portion of stop 28, thereby moving its brake portion 34 into engagement with the sloping back portion of the associated tooth of ratchet wheel 16 to stop the movement of the driving mechanism.
  • stop member 32 prevents any so-called overtravel, which could occur on the completion of the return movement of the finger wheel, by the ratchet being able to rotate an amount equal to the angular distance between its teeth. This distance being the amount of travel of the ratchet wheel before portion 24, of pawl 21, engages the sloping back portion of the next associated tooth.
  • Cam portion 33 also engages arm 22 of pawl 21, to lock the pawl in engagement relationship with the ratchet thereby stopping the finger wheel in its normal position.
  • the final stop position of the finger wheel is so adjusted (by bending stop member 28 in or out) that the indicia seen in Fig. 1 appear centrally of me finger holes (not shown).
  • the device is also provided with a limit stop in that plate 12 has an arm 13 which will engage the side of stop 28 if the latter is set too far out. If this occurs, the return movement stops with a metallic click, which can be eliminated by the above noted proper adjustment, which provides a small normal clearance between parts 13 and 28.
  • a calling device including a sending mechanism and a rotatable finger-Wheel member, means for driving the sending mechanism in one direction only responsive to back and forth rotation of the finger-wheel member, said driving means including a ratchet wheel and a pawl, the ratchet wheel having teeth inclined to promote clutching engagement by the ratchet for one direction of rotation of the finger-wheel member and to avoid clutching engagement for the other direction of rotation, the pawl having two oppositely acting arms each ending in two angularly disposed tooth-contacting faces effective during respective directions of rotation of the finger-wheel memher, both faces of one arm being disposed at a nonclutching angle with respect to said teeth, the two faces of the other arm being disposed respectively at a clutching and a non-clutching angle with respect to said teeth.
  • a calling device including a sending mechanism and a finger-wheel member rotatable forward from a stop position and back to such position, means including a pawl carried with the finger-wheel member and a ratchet wheel connected with the sending mechanism for driving the sending mechanism only during the said back rotation, the pawl engaging a tooth of the ratchet wheel to rotate such wheel during the back rotation, a rotatable stop member for use in defining the said step position and means fixed with the finger-wheel member for supporting it for movement radially of the ratchet wheel to permit it to pass over the teeth thereof during the forward rotation, and a fixed stop member engaged by the rotatable stop member to force the rotatable stop member against a tooth of the ratchet wheel as the finger-wheel member reaches its said stop position, to thereby stop the fingerwheel member in its said step position and to lock the ratchet wheel against further rotation.

Description

Feb. 19, 1957 J. E. BOSH DIAL TYPE OF IMPULSE SENDER Filed Dec 26 1951 FIG. 6
INVENTOR- JAMES E. BOSH BY WM W ATTORNEY United States. Patent DIAL TYPE or IMPULSE SENDER Application December 26, 1951, Serial No. 263,399
2 Claims. (Cl. 74-152) This invention relates to a dial type of impulse sender, or calling device, such as is commonly employed in automatic telephone systems. The main object of the invention is to provide a simple and reliable sender, or calling device, of this type which produces a minimum of noise in operation.
The invention is disclosed as applied to a calling device generally according to the Obergfell Patent No. 1,642,822, issued September 20, 1927. Such a calling device has a tenhole finger wheel for rotating a main shaft to carry a pawl over a desired number of teeth of a ratchet wheel according to the number of pulses to be sent, When the finger wheel is released, a spring wound by the rotation drives the finger wheel back to normal position. When the return movement begins, the pawl engages the last tooth passed over, to clutch the sending mechanism with the finger wheel, thereby driving the sending mechanism.
A more specific object of the invention is to provide an improved pawl mechanism which avoids the noise and wear incident to the pawl passing over the teeth of the ratchet wheel during the windup movement. This object is attained in the disclosed mechanism by employing a double-armed pawl having the two arms so coacting with the ratchet wheel that the desired pawl engagement is secured by a camming action, rather than by the usual spring-bias action which drops the pawl successively into the notches of the wheel with a series of hammer blows, with consequent objectionable wear and metallic clicks.
A special feature of the invention concerns a travelling stop member movable radially of the ratchet wheel and cooperating with a sloping fixed stop member to stop the return movement of the mechanism accurately with a minimum of hammer action and noise.
Other objects and features of the invention will appear as the description progresses.
The accompanying drawings, comprising Figs. 1 to 7 show a calling device embodying the principles of the invention.
Fig. 1 is a front view of the device with the finger wheel removed, Figs. 2 to 4, are a partial front view, a side view, and a rear view of part of the mechanism appearing in Fig. 1, showing the ratchet and pawl to a better advantage.
Figs. 5 to 7 are additional rear views of the ratchet and pawl as the finger wheel is rotated.
Referring to the drawing, Fig. 1 a front view, shows the calling device with the finger wheel removed. The finger wheel (not shown) has a central raised portion which fits over slightly raised hub 10 on plate 12, being held in place by a screw which is threaded into aperture 11 of hub 10. With the finger wheel installed and rotated forwardly in the usual manner as described in the cited patent, the plate 12 is rotated in the indicated clockwise direction as seen in Figs. 1 and 2, and counterclockwise as seen from the rear in Figs. 4 to 6. The ratchet wheel 16 stands still while the plate 12 is rotated forwardly, and consequently pawl 21, pivotally secured toplate 12 by shoulder rivet 30, passes over the teeth of the ratchet wheel. As viewed in Figs. 2 and 3, travelling stop member 32 and frictional spring 36 also are pivotally secured to plate 12 by shoulder rivet 30. Stop member 32 is provided with a cam portion 33, which engages stop arm 28 (at the completion of the return movement of the mechanism) to jam an integral brake portion 34 into en-' gagement with the sloping back portion of its associated tooth of ratchet wheel 16, to stop the mechanism in its illustrated normal position. When the finger wheel is rotated forwardly the brake portion 33 of stop 32, passes over the teeth of the ratchet wheel. Friction spring 36 eliminates any mechanical chattering of pawl 21 to insure its free movement during the operation of thedevice. Spring 36 is positioned by having its offset tip portion 37 inserted into an aperture 27 provided in pawl 21, as seen best in Fig. 3.
Pawl 21 extends from its fulcrum to partially encircle the ratchet wheel 16 with two integral arm portions 22 and 23. The engaging arm 22, of pawl 21, engages an associated tooth of the ratchet wheel at the beginning of the return movement of the finger wheel to drive the impulse-sending mechanism. The guiding arm 23 passing over the teeth of the ratchet wheel moves the engaging arm 22 into the associated notch between the teeth of wheel 16.
Fig. 4 shows the pawl and ratchet wheel in its normal position, while Figs. 5 to 7 show the relationship between pawl 21 and ratchet wheel 16 as the finger wheel is rotated corresponding to the desired digit. As previously noted, the finger wheel (not shown) is rotated by the subscriber and secured thereto is plate 12, carrying pawl 21. Fig. 4 shows the ratchet and pawl in its normal position, while Fig. 5 shows the relative position of the pawl with respect to its associated teeth of the ratchet wheel as the finger wheel is slightly rotated in a counterclockwise direction, as indicated on the drawing. The forward angular portion 24 of engaging arm 22 engages the sloping back portion of tooth 17, upon further movement of the finger wheel, portion 24 moves guiding arm 23 into the notch between its associated teeth of wheel 16. As the finger wheel is rotated still further angular portion 26 of guiding arm 23 engages the sloping back portion of tooth 18 moving the guiding arm 23 outward thereby moving the engaging arm 22 about its fulcrum into the notch between teeth 17 and 19, as shown in Fig. 6. As the finger wheel is further rotated the pawl passes over the teeth of the ratchet in the same manner as described, until the finger wheels rotationable movement is stopped by the engagement of the subscribers finger with the finger stop 15.
The position of the pawl and ratchet wheel before the finger wheel is released is shown in Fig. 7, the guiding arm 23 has engaged the sloping back portion of its associated tooth to move the engaging arm 22 into engaging position. When the finger wheel is released, the plate 12 and its attached pawl 21 is returned to its normal illustrated position as shown in Fig. 4. Upon its return movement portion 25 of pawl 16 engages the front face of its associated tooth of ratchet wheel 16 to drive the impulse sending mechanism. The engaging face of the teeth, of the ratchet wheel, and surface 25 of pawl 21 are of an angular design whereby the engagement of the two surfaces providing a camming action to force engaging portion of arm 22 still further into its associated notch.
As the finger wheel is returned to its normal position, cam portion 33, of stop member 32, engages the angular portion of stop 28, thereby moving its brake portion 34 into engagement with the sloping back portion of the associated tooth of ratchet wheel 16 to stop the movement of the driving mechanism.
The provision of stop member 32 prevents any so-called overtravel, which could occur on the completion of the return movement of the finger wheel, by the ratchet being able to rotate an amount equal to the angular distance between its teeth. This distance being the amount of travel of the ratchet wheel before portion 24, of pawl 21, engages the sloping back portion of the next associated tooth. Cam portion 33 also engages arm 22 of pawl 21, to lock the pawl in engagement relationship with the ratchet thereby stopping the finger wheel in its normal position. The final stop position of the finger wheel is so adjusted (by bending stop member 28 in or out) that the indicia seen in Fig. 1 appear centrally of me finger holes (not shown).
The device is also provided with a limit stop in that plate 12 has an arm 13 which will engage the side of stop 28 if the latter is set too far out. If this occurs, the return movement stops with a metallic click, which can be eliminated by the above noted proper adjustment, which provides a small normal clearance between parts 13 and 28.
I claim:
1. In a calling device including a sending mechanism and a rotatable finger-Wheel member, means for driving the sending mechanism in one direction only responsive to back and forth rotation of the finger-wheel member, said driving means including a ratchet wheel and a pawl, the ratchet wheel having teeth inclined to promote clutching engagement by the ratchet for one direction of rotation of the finger-wheel member and to avoid clutching engagement for the other direction of rotation, the pawl having two oppositely acting arms each ending in two angularly disposed tooth-contacting faces effective during respective directions of rotation of the finger-wheel memher, both faces of one arm being disposed at a nonclutching angle with respect to said teeth, the two faces of the other arm being disposed respectively at a clutching and a non-clutching angle with respect to said teeth.
2. In a calling device including a sending mechanism and a finger-wheel member rotatable forward from a stop position and back to such position, means including a pawl carried with the finger-wheel member and a ratchet wheel connected with the sending mechanism for driving the sending mechanism only during the said back rotation, the pawl engaging a tooth of the ratchet wheel to rotate such wheel during the back rotation, a rotatable stop member for use in defining the said step position and means fixed with the finger-wheel member for supporting it for movement radially of the ratchet wheel to permit it to pass over the teeth thereof during the forward rotation, and a fixed stop member engaged by the rotatable stop member to force the rotatable stop member against a tooth of the ratchet wheel as the finger-wheel member reaches its said stop position, to thereby stop the fingerwheel member in its said step position and to lock the ratchet wheel against further rotation.
References Cited in the file of this patent UNITED STATES PATENTS 353,886 Roe Dec. 7, 1886 389,052 Brown Sept. 4, 1888 817,358 Zwilling et a1 Apr. 10, 1906 1,217,176 Hodge Feb. 27, 1917 2,133,469 Obergfell Oct. 18, 1938 2,389,695 Stenhammer Nov. 27, 1945 2,428,569 Hunt et a1 Oct. 7, 1947 2,655,052 Montalto Oct. 13, 1953
US263399A 1951-12-26 1951-12-26 Dial type of impulse sender Expired - Lifetime US2781666A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US263399A US2781666A (en) 1951-12-26 1951-12-26 Dial type of impulse sender
FR1068557D FR1068557A (en) 1951-12-26 1952-12-24 Improvements to telephone call dials
DEL23049A DE1007815B (en) 1951-12-26 1955-09-27 Number switch for telephones with an inertia contact controlled by the spindle
DEL23068A DE1002042B (en) 1951-12-26 1955-09-29 Switching device for local telephones with different Gespraechsgebuehr in Selbstwaehlanlagen
FR70823D FR70823E (en) 1951-12-26 1956-09-27 Improvements to telephone call dials
FR71354D FR71354E (en) 1951-12-26 1956-09-28 Improvements to telephone call dials

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Application Number Priority Date Filing Date Title
US263399A US2781666A (en) 1951-12-26 1951-12-26 Dial type of impulse sender

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US2781666A true US2781666A (en) 1957-02-19

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US263399A Expired - Lifetime US2781666A (en) 1951-12-26 1951-12-26 Dial type of impulse sender

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FR (3) FR1068557A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4183260A (en) * 1976-07-14 1980-01-15 Paul-Heinz Wagner Maschinenfabrikation Tool for rotating nuts, bolts and like fasteners

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US353886A (en) * 1886-12-07 Alpheus e
US389052A (en) * 1888-09-04 Hoisting-gear
US817358A (en) * 1905-06-24 1906-04-10 Henry Zwilling Wagon-brake.
US1217176A (en) * 1916-03-09 1917-02-27 Wm L Gilbert Clock Company Winding-stop.
US2133469A (en) * 1936-09-05 1938-10-18 Associated Electric Lab Inc Calling device
US2389695A (en) * 1944-05-19 1945-11-27 Control Instr Co Inc Impulse sender
US2428569A (en) * 1943-05-07 1947-10-07 Express Lift Co Ltd Step-by-step actuator for electromagnetic switches
US2655052A (en) * 1950-07-29 1953-10-13 Telephonics Corp Impulse switch silencer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US353886A (en) * 1886-12-07 Alpheus e
US389052A (en) * 1888-09-04 Hoisting-gear
US817358A (en) * 1905-06-24 1906-04-10 Henry Zwilling Wagon-brake.
US1217176A (en) * 1916-03-09 1917-02-27 Wm L Gilbert Clock Company Winding-stop.
US2133469A (en) * 1936-09-05 1938-10-18 Associated Electric Lab Inc Calling device
US2428569A (en) * 1943-05-07 1947-10-07 Express Lift Co Ltd Step-by-step actuator for electromagnetic switches
US2389695A (en) * 1944-05-19 1945-11-27 Control Instr Co Inc Impulse sender
US2655052A (en) * 1950-07-29 1953-10-13 Telephonics Corp Impulse switch silencer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4183260A (en) * 1976-07-14 1980-01-15 Paul-Heinz Wagner Maschinenfabrikation Tool for rotating nuts, bolts and like fasteners

Also Published As

Publication number Publication date
FR70823E (en) 1959-09-01
FR71354E (en) 1959-12-22
FR1068557A (en) 1954-06-28

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