US3790726A - Cam operated electrical timer assembly with improved contact and associated peripheral rib cam - Google Patents

Cam operated electrical timer assembly with improved contact and associated peripheral rib cam Download PDF

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Publication number
US3790726A
US3790726A US00262137A US3790726DA US3790726A US 3790726 A US3790726 A US 3790726A US 00262137 A US00262137 A US 00262137A US 3790726D A US3790726D A US 3790726DA US 3790726 A US3790726 A US 3790726A
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US
United States
Prior art keywords
switch
cam
disc
gear train
electrical
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
US00262137A
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English (en)
Inventor
W Brown
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.)
Duracell Inc USA
Emerson Electric Co
Original Assignee
PR Mallory and Co Inc
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Filing date
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Application granted granted Critical
Publication of US3790726A publication Critical patent/US3790726A/en
Anticipated expiration legal-status Critical
Assigned to EMERSON ELECTRIC CO. A CORP. OF MISSOURI reassignment EMERSON ELECTRIC CO. A CORP. OF MISSOURI ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EMHART INDUSTRIES, INC. A CORP. OF CONNECTICUT
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F3/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork
    • G04F3/06—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork with electric driving mechanisms

Definitions

  • the present .invention is directed to minature electronic timers and more specifically to the type of electronic timers utilized in small appliances.
  • One application for the present invention is'realized in providing an when blending specific types of liquids or foods or combinations thereof in a kitchen blender, the articles being blended will .not rise to the top of the blender when a constant speed is supplied to the impeller blade.
  • a pulsating current is provided to the motor of the blender, providing an on-off condition to the impellerof the blender, the liquid or food materials tend to be carried to the top level in the blender and then returned; back to the bottom thereby giving a thorough andcomplete blending operation.
  • the particular design of the present invention is such that it may be added to presently designed blenders and may consume a minimum amount of space within the housing of the blender.
  • the present invention may be placed into operation, into the circuitry of the blender, by selectively actuating an on-off switch on the blender to select either a pulse cycle or the standard cycle presently provided in the blender.
  • The. present invention is therfore concerned with providing ,a timer switch and has as one of its objects the provision of a timer switch constructed of modular discs, one of the discs providing a motor, a second disc providing a gear train and a third disc containing a program means and an electrical switch responsive to the program means for providing a quick-make and quickbreak of an electricalcontact.
  • Another object of the present invention is to provide a timer switch that is relatively small in'size.
  • Still another object of the present invention is to provide a time switch that can be assembled together with relatively simple means.
  • a further object of the present invention is to provide a housing for the timer switch that will encompass a program means and provide rigid retaining means for a first and second switch blade that are responsive to the program means.
  • Another object of the present invention is to provide a modular switching disc for a timer switch that may be assembled with other modular switch discs to therefore increase the amount of program means available in a standard unit.
  • Still another object of the present invention is to provide a small compact switching arrangement that will provide a quick-make and quick-break of electrical contacts to aid in preventing arcing of the. contacts.
  • a further object of the present invention is to provide a timer switch having a cylindrical exterior.
  • Yet another object of the present invention isto provide a pair of cooperatingxswitch blades that may be juxtaposition to each other and still ride the same program cam with a portion of the first switch blade extending throughthe plain of the second switch blade.
  • Still another object of the present invention is to provide a pair of electrical switches arranged so that one of the switch blades may be responsive to a program means and a second switch blade.
  • FIG. I is a perspective view of the timer switch.
  • FIG. 2 is an exploded perspective view of the switching and program means; I a
  • FIG. 3 is a vertical section throughthe switch disc and showing the program means. and the switching means in elevation:
  • FIG. 4 is a side view of the timer switch with a portion of the switch disc removed
  • FIG. 5 is a top view of the switch blades and the program means.
  • a timer switch of modular construction including a modular disc-shaped motor, a modular disc-shaped gear train, and a modular disc-shaped switch assembly, which includes the program means, with the program means being driven by the modular gear train that is driven by the modular motor so that when the program means is rotated it will actuate a plurality of switch blades designed to ride on the periphery of the program means to move the switch blades with respect to each other and with one of the switch blades being responsive to a second switch blade.
  • the timer switch as illustrated, is assembled together by way'of coupling the disc-shaped motor to the discshaped gear train with key typelegs.( not shown) carried by "the motor engaging openings in the gear train and rotating the motor with respect to the gear train to lock the two together.
  • the program ,means is then assembled on a shaft extending from the gear train and rotationaly coupled thereto.
  • the disc-shaped switch housing is then positioned adjacent to the gear train and fastened thereto by a pair of C rings retained in posts extending from the gear train withxan insulative barrier separating the gear train from the switch housing.
  • the disc-shaped switch housing covers and supports a pair of electrical switch blades.
  • the electrical switch blades are provided near their'distal ends with an extended finger, which acts as cam followers, to ride on their respective cams.
  • the fingers are designed to lie in a side by side relationship that will allow movement of the distal ends of the electrical switchblades without interfering with each other.
  • the first electrical switch blade follows its designated program it will be allowed to drop and therefore make contact through electrical contacts with the second electricalswitch blade, which is riding on its predetermined cam.
  • the second electrical switch blade is allowed to drop to follow the contour of its cams.
  • Located at the distal ends of the posts are threaded appertures to provide a mounting means for mounting the timer switch to an appliance.
  • a timer switch 10 which includes a modular disc-shaped motor 12, a modular disc-shaped gear train 14 and a modular disc-shaped switch housing 16, which are an.
  • the modular disc-shaped motor 12 provides a synchronous electromechanical drive to the gear train 14 and is rigidly coupled to the gear train 14, by way of a plurality of legs on the motor (not shown) which extend into the gear train housing and then rotated into a locking position.
  • the gear train 14 includes a housing 14' which contains a plurality of gears (not shown) to provide the proper gear reduction from the motor 12. As seen in FIG. 2, the gear train 14 has an output shaft 19 which is rotated by the last gear in the gear train 14. Also located on the gear train 14, and staked thereto, is a pair of mounting posts 18.
  • a discshaped insulating barrier 22, is placed at the rear of the gear train 14 and over the mounting posts 18 and output shaft 19.
  • dimension A of modular disc shaped motor 12 is greater than dimension B of the modular disc shaped gear train 14 and dimension of A, B, and C is less than the dimension D across the face of one of the modular discs.
  • Modular disc-shaped switch housing 16 having a open end 16' is placed over the posts 18 and adjacent to the insulating barrier 22.
  • a program means 21 which includes a pair of electrical switch blades 24' and a rotatable program cam 23.
  • the program cam 23 is rotatably coupled to the double-D output shaft 19 of the gear train 14 by the double-D aperture 28.
  • the program cam 23 has a pair of independent cam surfaces, 30 and 32 that are separated by a peripheral rib 34.
  • Electrical switch blades 24, are carried in the switch housing with a first switch blade 36 rigidly carried in notch 36' in the housing 16 and a second switch blade 38 rigidly carried in notch 38.
  • Switch blade 36 is provided near its first distal end with an external electrical terminal 40 and at the opposite distal end with a cam program follower 44. Located near the program follower 44 is an electrical contact 42.
  • Second switch blade 38 is disposed immediately below the electrical switch blade 36 as viewed in FIGS. 2, 3, and 4. Electrical switch blade 38 is provided at one end with an external electrical terminal 46.
  • the second end of the electrical switch blade 38 is provided with a program follower 50 and located near the program follower 50 is an electrical contact 48, which is positioned to mate with electrical contact 42 of switch blade 36.
  • first electrical switch blade 36 being disposed immediately above the second electrical switch blade 38, it is necessary to provide a means in both electrical switch blades that will allow movement of their respective cam program followers 44 and 50.
  • electrical switch blade 36 is provided, adjacent its cam program follower 44, with a window 44, which allows cam program follower 50 of electrical switch blade 38 to move therethrough.
  • Electrical switch blade 38 is provided with a window 50 to allow movement of a cam program follower 44 therethrough.
  • program follower 44 follows the contour of cam 30, with cam program follower 50 of electrical switch blade 38, following cam surface 32.
  • the modular disc shaped housing 16, with electrical switch blades 24 supported therein, is rigidly attached to the gear train with disc shaped insulated barrier 22 sandwiched there between.
  • a pair of apertures 54 in the switch housing 16 allows the housing to fit over the mounting posts 18, which have been rigidly staked into the gear train 14.
  • a tool not shown
  • a pair of C rings 56 may be inserted into groves 58 in mounting posts 18 to retain housing 16 on posts 18.
  • a plurality of switching programs may be obtained by increasing the length of the output shaft 19 and providing additional program cams 23 and additional modular disc shaped housings 16 with electrical switch blades 24 mounted in the additional housings.
  • additional program cams 23 and additional modular disc shaped housings 16 with electrical switch blades 24 mounted in the additional housings To retain a plurality of modular disc shaped housings on the modular disc shaped gear train 14 it is necessary to increase the length of the mounting posts 18 to retain the added switch housings l6.
  • an electrical current may be applied to modular disc shaped motor 12 to drive the gear train 14.
  • the program cam 23 will rotate in a predetermined direction, for example clockwise as viewed in FIG. 3.
  • the first electrical switch blade 36 with its program follower 44 is allowed to drop off of the cam surface 30 to allow the electrical contacts 42 and 48 to make or engage each other and thereby complete an electrical circuit through switch blades 36 and 38.
  • the second electrical switch blade 38 with its program follower 50 is allowed to drop off of cam surface 32 to break the electrical circuit between electrical contacts 42 and 48.
  • the cam followers 44 and 50 are lifted simultaneously thereby preventing physical contact of the electrical contacts 48 and 42 and preparing switch blades 24 to repeat the aforementioned program sequence.
  • the present invention provides a timer switch constructed of modular disc shape units that may be stacked together to provide a small, compact timer unit.
  • a plurality of electrical programming sequences may be obtained by adding a plurality of modular disc shaped units 16 of identical construction and providing longer mounting posts 18.
  • Combinations of timing sequence durations may be obtained by different configurations of the program cams 23 and/or by changing the modular disc shaped gear train 14 to provide a variation in the output speed of output shaft 19.
  • a timer comprising a motor, a gear train driven by said motor, and a switch operable through said gear train, said switch comprising:
  • a cam rotatably driven by said gear train said cam having a pair of independent cam surfaces separated by a peripheral rib of said cam
  • cam followers disposed at a free end of each of said upper and lower switch blades, one each of said cam followers responsive to one of said independent cam surfaces, each of said cam followers hav- 4.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Food-Manufacturing Devices (AREA)
  • Keying Circuit Devices (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Measurement Of Predetermined Time Intervals (AREA)
US00262137A 1972-06-12 1972-06-12 Cam operated electrical timer assembly with improved contact and associated peripheral rib cam Expired - Lifetime US3790726A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26213772A 1972-06-12 1972-06-12

Publications (1)

Publication Number Publication Date
US3790726A true US3790726A (en) 1974-02-05

Family

ID=22996307

Family Applications (1)

Application Number Title Priority Date Filing Date
US00262137A Expired - Lifetime US3790726A (en) 1972-06-12 1972-06-12 Cam operated electrical timer assembly with improved contact and associated peripheral rib cam

Country Status (12)

Country Link
US (1) US3790726A (no)
JP (1) JPS4943174A (no)
AR (1) AR199401A1 (no)
AU (1) AU467407B2 (no)
BE (1) BE800769A (no)
BR (1) BR7304389D0 (no)
CA (1) CA988979A (no)
DE (1) DE2329707B2 (no)
FR (1) FR2188290B1 (no)
GB (1) GB1401091A (no)
IT (1) IT985676B (no)
NO (1) NO137468C (no)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3883708A (en) * 1974-01-14 1975-05-13 Controls Co Of America Timer switch assembly with independently controlled manual and motor driven cams
US4218595A (en) * 1977-02-18 1980-08-19 Niles Parts Co., Ltd. Composite switch device mounted to the steering shaft of automobiles
US4463231A (en) * 1982-08-26 1984-07-31 Cts Corporation Push-push switch
US4734548A (en) * 1987-03-30 1988-03-29 Emhart Industries, Inc. Cam operated program timer assembly with housing and terminal blade mounting features
US5977497A (en) * 1997-05-23 1999-11-02 Hirose Electric Co., Ltd. Reliable switch for IC cards
USD761743S1 (en) * 2014-08-19 2016-07-19 Robertshaw Controls Company Timer blade

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6230271Y2 (no) * 1978-05-15 1987-08-04
JPS5511066U (no) * 1978-06-30 1980-01-24
JPH0716279Y2 (ja) * 1986-02-03 1995-04-12 松下電工株式会社 タイムスイッチ
CN111769004A (zh) * 2020-07-14 2020-10-13 李钰 一种急停高压开关

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1645720A (en) * 1925-07-20 1927-10-18 Pfanstiehl Radio Company Method of and apparatus for controlling battery chargers
US3478181A (en) * 1966-03-10 1969-11-11 Edward Thomas Buckerridge Electric circuit controllers incorporating time-switches
US3553720A (en) * 1969-12-22 1971-01-05 Mallory & Co Inc P R Variable circuit timer with improved contact securing means
US3652814A (en) * 1969-05-23 1972-03-28 Citizen Watch Co Ltd Reciprocating and rotatable cam actuating means for electromechanical timers
US3679988A (en) * 1970-11-10 1972-07-25 Tri Tech Cam actuated switch assembly
US3699277A (en) * 1971-06-11 1972-10-17 Mallory & Co Inc P R Timer with internal stop mechanism comprising annular ring structure interfitting complementary housing member
US3700839A (en) * 1971-06-28 1972-10-24 Sangamo Electric Co Watthour meter indicator with improved cam and microswitch operator structure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2382078A (en) * 1944-01-17 1945-08-14 California Research Corp Variable cycle timer
US3699278A (en) * 1970-09-28 1972-10-17 Mallory & Co Inc P R Electrical timer with improved resilient contact mounting at ganged housing section complementary interfaces

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1645720A (en) * 1925-07-20 1927-10-18 Pfanstiehl Radio Company Method of and apparatus for controlling battery chargers
US3478181A (en) * 1966-03-10 1969-11-11 Edward Thomas Buckerridge Electric circuit controllers incorporating time-switches
US3652814A (en) * 1969-05-23 1972-03-28 Citizen Watch Co Ltd Reciprocating and rotatable cam actuating means for electromechanical timers
US3553720A (en) * 1969-12-22 1971-01-05 Mallory & Co Inc P R Variable circuit timer with improved contact securing means
US3679988A (en) * 1970-11-10 1972-07-25 Tri Tech Cam actuated switch assembly
US3699277A (en) * 1971-06-11 1972-10-17 Mallory & Co Inc P R Timer with internal stop mechanism comprising annular ring structure interfitting complementary housing member
US3700839A (en) * 1971-06-28 1972-10-24 Sangamo Electric Co Watthour meter indicator with improved cam and microswitch operator structure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3883708A (en) * 1974-01-14 1975-05-13 Controls Co Of America Timer switch assembly with independently controlled manual and motor driven cams
US4218595A (en) * 1977-02-18 1980-08-19 Niles Parts Co., Ltd. Composite switch device mounted to the steering shaft of automobiles
US4463231A (en) * 1982-08-26 1984-07-31 Cts Corporation Push-push switch
US4734548A (en) * 1987-03-30 1988-03-29 Emhart Industries, Inc. Cam operated program timer assembly with housing and terminal blade mounting features
US5977497A (en) * 1997-05-23 1999-11-02 Hirose Electric Co., Ltd. Reliable switch for IC cards
USD761743S1 (en) * 2014-08-19 2016-07-19 Robertshaw Controls Company Timer blade
USD790485S1 (en) 2014-08-19 2017-06-27 Robertshaw Controls Company Timer blade

Also Published As

Publication number Publication date
BR7304389D0 (pt) 1974-08-22
AR199401A1 (es) 1974-08-30
BE800769A (fr) 1973-10-01
NO137468C (no) 1978-03-01
DE2329707B2 (de) 1976-04-22
FR2188290B1 (no) 1977-09-09
JPS4943174A (no) 1974-04-23
NO137468B (no) 1977-11-21
GB1401091A (en) 1975-07-16
DE2329707A1 (de) 1973-12-20
AU5480873A (en) 1974-10-31
CA988979A (en) 1976-05-11
AU467407B2 (en) 1975-11-27
IT985676B (it) 1974-12-10
FR2188290A1 (no) 1974-01-18

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Legal Events

Date Code Title Description
AS Assignment

Owner name: EMERSON ELECTRIC CO. A CORP. OF MISSOURI, MISSO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EMHART INDUSTRIES, INC. A CORP. OF CONNECTICUT;REEL/FRAME:005691/0720

Effective date: 19910125