US3823280A - Timer - Google Patents

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Publication number
US3823280A
US3823280A US00409961A US40996173A US3823280A US 3823280 A US3823280 A US 3823280A US 00409961 A US00409961 A US 00409961A US 40996173 A US40996173 A US 40996173A US 3823280 A US3823280 A US 3823280A
Authority
US
United States
Prior art keywords
blade
cam
housing
blades
motor
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
US00409961A
Other languages
English (en)
Inventor
G Obermann
M Enger
M Misik
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.)
Eaton Corp
Original Assignee
Controls Company of America
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 Controls Company of America filed Critical Controls Company of America
Priority to US00409961A priority Critical patent/US3823280A/en
Priority to CA195,738A priority patent/CA984430A/en
Priority to JP49043496A priority patent/JPS5073184A/ja
Priority to GB1806574A priority patent/GB1433287A/en
Priority to SE7405972A priority patent/SE7405972L/xx
Priority to FR7416225A priority patent/FR2249425B3/fr
Priority to IT22579/74A priority patent/IT1012264B/it
Priority to ES426267A priority patent/ES426267A1/es
Priority to DE7416669U priority patent/DE7416669U/de
Application granted granted Critical
Publication of US3823280A publication Critical patent/US3823280A/en
Assigned to CONTROLS COMPANY OF AMERICA, 9655 W. SORENG AVENUE, SCHILLER PARK, IL., A CORP. OF DE. reassignment CONTROLS COMPANY OF AMERICA, 9655 W. SORENG AVENUE, SCHILLER PARK, IL., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SINGER COMPANY, THE
Assigned to EATON CORPORATION, A CORP. OF OH. reassignment EATON CORPORATION, A CORP. OF OH. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CONTROLS COMPANY OF AMERICA
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/02—Details
    • H01H43/022—Bases; Housings; Mountings
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
    • G04C23/14—Mechanisms continuously running to relate the operation(s) to the time of day
    • G04C23/16—Mechanisms continuously running to relate the operation(s) to the time of day acting only at one preselected time or during one adjustable time interval
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/06—Fixing of contacts to carrier ; Fixing of contacts to insulating carrier
    • H01H2011/062—Fixing of contacts to carrier ; Fixing of contacts to insulating carrier by inserting only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/02—Details
    • H01H43/026—Contact arrangements

Definitions

  • the gear case somewhat divides the motor case to retain the coil while the motor case cover cooperates with the gear case to enclose and journal the gearing with the drive pinion projecting therebetween to drive the gear on the perimeter of the timing cam.
  • the timing cam is journaled on the bushing extruded from the motor cover and in the aperture in the housing cover with the gear cluster extension projecting into and visible in the cam hub'to afford visual verification of motor operation.
  • the three switch blades are accurately located in the housing by tabs engaging locating cavities and the pivoted yoke has pads which space the two outside blades from each other. During the time between defrost cycles the No. 1 blade rides on the cam with the No. 2 blade engaging the No. 1 blade.
  • the top face of this molding 44 includes an annular boss 46 which functions as a bearing acting against the bottom of housing cover 14.
  • the hub 42 projects through the housing cover for access from the exterior of the timer.
  • the end of the hub has a one-way parts are accurately located in the molded housing and the cover functions to pin and/or retain all parts in assembled position while .the cover pins. are sonically welded to complete the assembly.
  • the spacer/yoke member insures accurate switching at minimal cost with few parts.
  • FIG. 1 is a top plan view with the cover removed.
  • FIG. 2 is a vertical section taken through the center of the motor and the center of the timing cam.
  • FIG. 3 is a perspective view of the completed timer.
  • F IG: 3 shows the pointed tabs which are formed from the terminal portion of the blades for the purpose of re taining the blades in the housing.
  • FIG. 9 is a perspective of the underside of the cover.
  • DESCRIPTION OF THE PREFERRED EMBODIMENT Timer housing I0 includes body 12 and cover 114.
  • the body has a cavity M which receives motor and gear case assembly 16.
  • This assembly includes motor case 18, the bottom of which is lanced to provide upwardly projecting stator poles 20 which lie inside coil 22.
  • the coil is enclosed by the gear case 24 pressed inside the motor case 18 and having lanced poles 26 concentric with and lying between poles 20.
  • the permanent magnet rotor 28 is mounted on shaft 30 joumaled in the motor case and in the cover 38 and carrying drive pinion 32 which drives the reduction gear clusters.
  • One cluster includes an output shaft 34 carrying screwdriver slot arrangement generally denoted 48 permitting the serviceman to manually drive the cam in a clockwise direction (only) to check out the operation of the switching.
  • shaft 40 isvisible through the center of the hub 42.
  • the end of the shaft has a flat 49 cut therein so as to give a different visual impression when viewed head-on. The purpose of this is to permit observation of the shaft end to determine whether or not the motor is operating.
  • the timercam is generally operated at a speed of onetwelfth or one twenty-fourth revolution per hour and this, of course, would be very difficult to observe.
  • the end of shaft 46 rotates at approximately 13 RPM and this speed of rotation can, of course, be observed.
  • the motor and gear assembly constitutes a complete subassembly totally enclosed within the motor case Wand motor cover 38 with the coil leads 50,52 being brought out the bottom of the subassembly and led up the side of the subassembly between the subassembly and the housing body 12 for connection to terminal 54 and the terminal portion of the middle switch blade 56.
  • the middle blade will also be referred to as the second blade.
  • the shaft 40 projects through the opening in motor cover 38 and the perimeter of the opening is extruded outwardly at 54 to provide a bushing or bearing surface for hub 42 of the timing cam.
  • the timing cam hub 42 is also joumaled in the aperture in housing cover 14.
  • motor cover 36 is provided with projecting mounting ears 58,66, each of which is provided with an aperture which aligns with an aperture in the housing body T2 for purposes which will appear more fully hereinafter.
  • the first blade 62 has itsproximal portion mounted in a slot in the. housing body ll2 with the end projecting to the exterior of the housing for connection to external wiring.
  • the distal end of the blade carries a contact 64 and is adapted to ride on the cam surface of the timing cam 44.
  • the middle or second blade 56 is similarly mounted in the slot and is longer than the first blade 62 by an amount designated X in FIG. ll, the significance of this dimension being more fully explained hereinafter.
  • the second blade carries a contact on each side of the blade at the distal portion, contact 66 being engageable with contact 64 on the first blade and contact 68 being engageable with contact 76 carried by the distal portion of blade 72 which is also mounted in a slot in the housing body with its end projecting to the exterior of the 3 housing for external electrical connection. All of the blades are biased towards the cam.
  • a yoke or spacer member 74 is pivotally mounted on post 76 molded in the housing underneath the blades.
  • Cover 14 is provided with a depending finger 78 which rests on top of the hub portion 80 of the yoke 74 to retain the yoke in its assembled position.
  • the yoke includes two upstanding arms 82,84 which straddle blade 56 while lying between the first and second blades in the case of arm 82 and between the second and third blades in the case of arm 84.
  • the outer surface of arm 82 is engageable with the blade 62 while the outer surface of arm 84 is engageable with the third blade.
  • the yoke functions to space the third blade a predetermined distance from the first blade and this, in turn, prevents the third blade from making contact with the second or middle blade.
  • the coil leads 50,52 are connected to the motor terminal 54 and to the middle blade terminal 56. Thus these two terminals are designed to be electrically hot.
  • the distal end of the second blade will rest on the maximum rise portion.
  • the connection between the first and second blades is broken but the movement of the first blade to the bottom of the drop S will permit the third blade to now move under self-bias into engagement with the second blade, thus making a circuit from the second blade to the third.
  • This can control a heater, for example, while breaking the compressor circuit.
  • the duration of the defrost cycle starts at this instant and lasts until the distal end of the second blade drops off point T. This, then, means that the dimension X (mentioned before) becomes determinative of the duration of the cycle in combination with the rotary speed of the timing cam.
  • the distance X is one which must be controlled with precision and it is a simple matter to stamp a blade to a precise length.
  • the next step in controlling this precision is to precisely mount the blade so that it lies exactly where it was designed to lie.
  • the proximal portion of each blade is provided with a shear-formed tab 86 (see FIG. 7) which is a simple thing to control with great precision.
  • This tab is designed to be received in the cavity 87 adjacent each of the blades where they lie in the slots. This, then, precisely locates each blade and terminal relative to the body and relative to the cam.
  • the cavity can be controlled with accuracy and its location, of course, is fixed.
  • each blade is provided with sheared, pointed tabs 88 which project upwardly as the blade is inserted into the slot but which dig into the plastic body and prevent removal of the blades once they have been seated. F urthermore, the cover overlies all of these blades and retains them in position.
  • the cover itself is provided with integral depending plastic pins 91,93 which are received in the holes 90,92 and pins 95,97 are received in the holes 94,96 in the mounting ears 58,60 of the motor subassembly.
  • These holes 94,96 line up with holes in the housing.
  • the enlarged portion of each of these pins overlies the ears 58 and 60 to firmly hold the ears in the desired position and the extending reduced diameter portion of the pins pass into the holes and are then sonically welded into the body to firmly lock the cover in place while at the same time functioning to hold all of the parts in position. No conventional fasteners are used in the assembly of the entire timer.
  • a timer comprising a housing
  • timing cam rotatably mounted in the housing having a slow rise-fast drop surface
  • thesecond blade being longer than the first so it engages the rise after the first blade drops at the fast drop portion of the cam until the second blade drops at the fast drop
  • a yoke member pivoted in the housing and having an arm projecting between the first and second blades and another arm projecting between the second and third blades with the second blade free to move freely between the arms and the arms serving to determine the minimum spacing between the first and third blades whereby the third blade is held out of contact with the second blade while the second blade is in contact with the first blade as the first blade engages the slow rise of the cam and the third blade is free to contact the second blade while the second blade is in contact with the cam.
  • a timer according to claim 1 where the cam has a hollow hub and the motor and gear means includes a shaft projecting into the hub and having an end configuration which readily indicates whether or not it is rotating,
  • a timer according to claim 2 in which the motor and cam means are enclosed in a casing mounted as a unit in the housing,
  • said housing including a body and a cover
  • a timer according to claim 1 in which the proximal ends of the blades are mounted in slots in the housing wall,

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Electromechanical Clocks (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US00409961A 1973-10-26 1973-10-26 Timer Expired - Lifetime US3823280A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00409961A US3823280A (en) 1973-10-26 1973-10-26 Timer
CA195,738A CA984430A (en) 1973-10-26 1974-03-22 Timer
JP49043496A JPS5073184A (en, 2012) 1973-10-26 1974-04-19
GB1806574A GB1433287A (en) 1973-10-26 1974-04-25 Timers
SE7405972A SE7405972L (en, 2012) 1973-10-26 1974-05-06
IT22579/74A IT1012264B (it) 1973-10-26 1974-05-10 Temporizzatore in particolare per controllare il ciclo di sbrinamento dei frigoriferi
FR7416225A FR2249425B3 (en, 2012) 1973-10-26 1974-05-10
ES426267A ES426267A1 (es) 1973-10-26 1974-05-13 Un dispositivo temporizador.
DE7416669U DE7416669U (de) 1973-10-26 1974-05-13 Zeitschalter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00409961A US3823280A (en) 1973-10-26 1973-10-26 Timer

Publications (1)

Publication Number Publication Date
US3823280A true US3823280A (en) 1974-07-09

Family

ID=23622656

Family Applications (1)

Application Number Title Priority Date Filing Date
US00409961A Expired - Lifetime US3823280A (en) 1973-10-26 1973-10-26 Timer

Country Status (9)

Country Link
US (1) US3823280A (en, 2012)
JP (1) JPS5073184A (en, 2012)
CA (1) CA984430A (en, 2012)
DE (1) DE7416669U (en, 2012)
ES (1) ES426267A1 (en, 2012)
FR (1) FR2249425B3 (en, 2012)
GB (1) GB1433287A (en, 2012)
IT (1) IT1012264B (en, 2012)
SE (1) SE7405972L (en, 2012)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012607A (en) * 1973-12-17 1977-03-15 Dieter Graesslin Feinwerktechnik Miniature timer
US4032739A (en) * 1974-10-28 1977-06-28 Danfoss A/S Supporting structure for leaf spring contact assembly
US4250420A (en) * 1979-06-05 1981-02-10 Emhart Industries, Inc. Sandwich structure for a combination motor and gear train with a timing mechanism
US4297547A (en) * 1978-12-14 1981-10-27 Emhart Industries, Inc. Miniature timing mechanism
US4406932A (en) * 1981-05-13 1983-09-27 Emhart Industries, Inc. Cam operated timer with improved electrical connections
US4415785A (en) * 1980-06-23 1983-11-15 Kabushiki Kaisha Higashifuji Seisakusho Timer switch
US4485281A (en) * 1983-03-02 1984-11-27 Emhart Industries, Inc. Push to start timing mechanism
US4491710A (en) * 1983-11-14 1985-01-01 Emhart Industries, Inc. Housing arrangement for a timing mechanism
US4734548A (en) * 1987-03-30 1988-03-29 Emhart Industries, Inc. Cam operated program timer assembly with housing and terminal blade mounting features
US4752656A (en) * 1986-01-24 1988-06-21 Kookje Elec. Ind. Co., Ltd. Switch device for controlling the power supply to an electric heater with one heater
US4849588A (en) * 1987-02-18 1989-07-18 Kabushiki Kaisha Sankyo Seiki Seisakusho Motor-driven time switch
US4956527A (en) * 1989-03-29 1990-09-11 Emhart Industries, Inc. Electromechanical timer with improved blade retention
US5028751A (en) * 1988-11-21 1991-07-02 Mitsuku Denshi Kogyo Kabushiki Kaisha Leaf switch
US5834718A (en) * 1997-03-03 1998-11-10 Emerson Electric Co. Appliance timer having a switching mechanism for high-current carrying circuit blades and associated method
US20030107272A1 (en) * 2001-12-10 2003-06-12 Lothar Westerweck Cam driven switch and overdrive protection method
CN102280307A (zh) * 2011-07-15 2011-12-14 太平洋电子(昆山)有限公司 除霜定时器用上盖中心轴固定结构
US20140145805A1 (en) * 2012-11-29 2014-05-29 Fujitsu Component Limited Relay
US10882649B2 (en) * 2014-08-14 2021-01-05 Fromm Holding Ag Drive unit for a strapping device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536205B1 (fr) * 1982-11-12 1987-10-30 Carpano & Pons Dispositif de commande d'un interrupteur electrique

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012607A (en) * 1973-12-17 1977-03-15 Dieter Graesslin Feinwerktechnik Miniature timer
US4032739A (en) * 1974-10-28 1977-06-28 Danfoss A/S Supporting structure for leaf spring contact assembly
US4297547A (en) * 1978-12-14 1981-10-27 Emhart Industries, Inc. Miniature timing mechanism
US4250420A (en) * 1979-06-05 1981-02-10 Emhart Industries, Inc. Sandwich structure for a combination motor and gear train with a timing mechanism
US4415785A (en) * 1980-06-23 1983-11-15 Kabushiki Kaisha Higashifuji Seisakusho Timer switch
US4406932A (en) * 1981-05-13 1983-09-27 Emhart Industries, Inc. Cam operated timer with improved electrical connections
US4485281A (en) * 1983-03-02 1984-11-27 Emhart Industries, Inc. Push to start timing mechanism
US4491710A (en) * 1983-11-14 1985-01-01 Emhart Industries, Inc. Housing arrangement for a timing mechanism
US4752656A (en) * 1986-01-24 1988-06-21 Kookje Elec. Ind. Co., Ltd. Switch device for controlling the power supply to an electric heater with one heater
US4849588A (en) * 1987-02-18 1989-07-18 Kabushiki Kaisha Sankyo Seiki Seisakusho Motor-driven time switch
US4734548A (en) * 1987-03-30 1988-03-29 Emhart Industries, Inc. Cam operated program timer assembly with housing and terminal blade mounting features
US5028751A (en) * 1988-11-21 1991-07-02 Mitsuku Denshi Kogyo Kabushiki Kaisha Leaf switch
US4956527A (en) * 1989-03-29 1990-09-11 Emhart Industries, Inc. Electromechanical timer with improved blade retention
US5834718A (en) * 1997-03-03 1998-11-10 Emerson Electric Co. Appliance timer having a switching mechanism for high-current carrying circuit blades and associated method
US20030107272A1 (en) * 2001-12-10 2003-06-12 Lothar Westerweck Cam driven switch and overdrive protection method
CN102280307A (zh) * 2011-07-15 2011-12-14 太平洋电子(昆山)有限公司 除霜定时器用上盖中心轴固定结构
US20140145805A1 (en) * 2012-11-29 2014-05-29 Fujitsu Component Limited Relay
US9330871B2 (en) * 2012-11-29 2016-05-03 Fujitsu Component Limited Relay
US10882649B2 (en) * 2014-08-14 2021-01-05 Fromm Holding Ag Drive unit for a strapping device

Also Published As

Publication number Publication date
CA984430A (en) 1976-02-24
DE7416669U (de) 1975-04-24
FR2249425A1 (en, 2012) 1975-05-23
IT1012264B (it) 1977-03-10
FR2249425B3 (en, 2012) 1976-06-18
GB1433287A (en) 1976-04-22
ES426267A1 (es) 1976-07-01
SE7405972L (en, 2012) 1975-04-28
JPS5073184A (en, 2012) 1975-06-17

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CONTROLS COMPANY OF AMERICA, 9655 W. SORENG AVENUE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SINGER COMPANY, THE;REEL/FRAME:004505/0515

Effective date: 19860110

AS Assignment

Owner name: EATON CORPORATION, EATON CENTER, 1111 SUPERIOR AVE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CONTROLS COMPANY OF AMERICA;REEL/FRAME:004614/0433

Effective date: 19861002