US3737595A - Push to start timer - Google Patents
Push to start timer Download PDFInfo
- Publication number
- US3737595A US3737595A US00212139A US3737595DA US3737595A US 3737595 A US3737595 A US 3737595A US 00212139 A US00212139 A US 00212139A US 3737595D A US3737595D A US 3737595DA US 3737595 A US3737595 A US 3737595A
- Authority
- US
- United States
- Prior art keywords
- plunger
- stem
- shaft
- timer
- switch
- 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
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Classifications
-
- 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
- I trol knob being secured to a plunger that is rotatably ....200/33 R, 200/38 R, 200/38 A keyed to the shaft but axially movable relative thereto, [51] Int. Cl...; whil and linkage operative from the plunger to actuate the [52] US. Cl.
- This invention relates to, andan object of this invention is to provide, a timer having a cluster of sequentially operated switches and a single control knob which upon rotation thereof sets the timer and further which upon axial displacement thereof starts the timer.
- FIG. 1 is a perspective view, partly broken away for clarity of disclosure, showing the subject invention as used in a first embodiment timer;
- FIG. 2 is a sectional view, as seen generally from line 2..2 in FIG. 1, showing the start switch contact means of the timer;
- FIG. 3 is a sectional view, as seen generally from line 3-.3 in FIG. 1, showing the control knob connection and start switch actuating linkage;
- FIG. 4 is a plan view of the operating cams and switch contacts used in the timer of FIG. 1;
- FIG. 5 is a sectional view, similar to FIG. 2, but .of a second embodiment of the timer invention.
- FIG. 1 illustrates a timer having a synchronous motor in housing 12 with the motor output being connected through a reduction gear train in the housing 14.
- the powered output shaft 16 from the gear train extends into case 18 and is geared through a slip clutch 17 to shaft 19 supported in the case.
- the case 18 houses a plurality of switches 21 and 23 disposed adjacent and actuated by cams and 22 respectively, keyed to and rotated by shaft 19.
- the switches 21 and 23 are comprised of a resilient leaf 24 secured at terminal 26 relative to the case and having two arms extending from the secured center, and separate resilient leafs 27 and 29 secured relative to the case at terminals 28 and 30 respectively, where the switch contacts are located at the free ends of the leafs.
- the leaf terminals extend through the case (See FIG. 2 as a typical construction) to provide for connection with external conductors (not shown) which in turn are directed in proper circuits to be controlled.
- Each arm of leaf 24 includes a cam follower 35 and 37' which engages its cam 20 and 22 respectively, and since each leaf arm is normally flexed against the cam, the cam contour determines when the contacts are opened and closed.
- the switch closing high spots and switch opening low spots on any cam By appropriate location of the switch closing high spots and switch opening low spots on any cam, the desired open close sequence can be obtained over one revolution of the cam; and each cam and its switch can provide an independent operating circuit during the same cam revolution.
- typically four or more cams would be keyed to the shaft each spaced apart axially along the shaft and each cam would operate a separate switch.
- a second resilient leaf 40 is also secured to the case 18 at the mounting terminal 26 and has a free end contact 42 that cooperates with contact 43 on aleaf 44 which is staked to the case at terminal 46 (as shownin FIG. 2).
- the terminal 46 would provide for connection with an exterior conductor (not shown) that together with the exterior conductor from terminal 26 would be connected in a starting circuit for the timer motor.
- These contacts 42 and 43 thereby provide a start control switch 47.
- the start circuit (not shown) might for example include a holding relay that is energized by momentary closing of the start switch 47 and is held engaged by 'one of the other timer switches which thereby releases the relay after the time cycle has run out to stop the timer motor.
- the start switch leaf 40 is received in a slot in a plunger 50 supported at its opposite ends 52 and 54 within openings on the case.
- the plunger is thus restrained to reciprocate axially in a direction parallel to the shaft 19, but such movement is effective to open and close the start switch.
- Coil compression spring 56 normally holds the plunger where the enlarged shoulder 58 engages the removable cover plate 60 of the case whereat the switch 47 is open, whilethe plunger can be moved against the bias of the spring to close the switch 47.
- a stem 66 is slidablyreceived in an open bore of shaft 19, and a coil compression spring 68 is confined between the shaft and stem effective to bias the stem outwardly relative to the shaft;
- a disc 69 is secured to the stem 66, such as in a recess therein, and rides within open slots 70 in the shaft 19; which disc both keys the stem and shaft to! gether rotatably and limits the axial shifting of the stem within the shaft.
- the shaft 19 has a pair of separated grooves located on opposite sides of the cover plate 6.0, and snap springs 72 are fitted therein to hold the shaft axially relative to the case.
- a control knob 74 is secured to the stem suitable to be gripped for manual rotation and/or axial depression.
- Wire spring 78 fits into an opening in the plunger 50 and is thereby united to the plunger and also extends across the case under the disc .69 and is hooked over and restrained on shoulder 80 in the case 12. The spring normallyis unflexed although it is proximate the disc when the plunger is in its upper extended position and the switch 47 is open. However, upon depression of the control knob 74, the disc engaging the wire shifts the plunger axially which in turn closes the switch contacts 42 and 43.
- the timer can have a visible dial face or the like which might indicate the time sequence either in minutes or invthe particular desire cycle of the appliance to which the timer relates, so that control knob 74 'is rotates to set the timer in the position desired. Thereafter the knob is depressed and the wire element 78 transmits this axial knob movement to'the switch plunger 50'to close the start switch 47 and begin operation of the timer.
- the knob can be depressed in any set position of the timer, although the separate start switch requires that the operator perform an additional step over and above merely setting the timer before'the timer actually begins. This also satisfies the safety code that provides that-once the timer stops, as for example upon the opening of the dryer door, it is necessary to depress the start control after the door is closed to again start the timer.
- FIG. 5 shows an alternate embodiment start switch 47a which is self contained.
- the switch 47a would include a housing 88 secured to the case such as by brackets 90 and the switch contacts (not shown) are located in the housing.
- a plunger 92 extends from the switch housing and lines up with the plunger 50a and is actuated by axial movement of this plunger.
- External terminals 93 and 94 are provided for connection to suitable conductors to the start control circuit. All other aspects of the timer can be similar, except the previously provided start switch 47 and the components therefor are eliminated and substituted by the self contained switch 47a.
- the disclosed invention not only provides a ready means of rotatably setting a timer but also allows the simultaneous initiation of the timer cycle itself by axial displacement of the same control knob.
- a timer having a frame and a shaft rotatably supported therein, cam'elements supported on and rotated with the shaft, switches supported by the frame and located adjacent respective cam elements adapted to be selectively actuated thereby upon rotation of the shaft, a stern telescoped relative to the shaft and means allowing limited axial stem displacement between spaced extreme positions relative to the shaft while also rotatably keying the stem and shaft together, and manual control knob means keyed to the stem
- the improvement comprising a secondary switch supported by the frame and having two operating conditions, a plunger supported in the frame to reciprocate in the same axially direction as the stern and stop means limiting the plunger displacement to between two opposite positions, said plunger being located adjacent thesecondary'switch and effective in one of said opposite positions to allow the secondary switch to assume one'of said operating conditions and effective upon travel from this one opposite position toward the other of the opposite positions and to a switch actuating position to shift the secondary switch to its other operating condition, a compression spring normally biasing the plunger to said
Abstract
Description
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US21213971A | 1971-12-27 | 1971-12-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3737595A true US3737595A (en) | 1973-06-05 |
Family
ID=22789722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00212139A Expired - Lifetime US3737595A (en) | 1971-12-27 | 1971-12-27 | Push to start timer |
Country Status (1)
Country | Link |
---|---|
US (1) | US3737595A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3866002A (en) * | 1973-10-15 | 1975-02-11 | Mallory & Co Inc P R | Dual-function line switch for a cam-actuated timer switch |
US4991155A (en) * | 1989-03-20 | 1991-02-05 | Sharp Corporation | Timer |
US6080943A (en) * | 1999-08-02 | 2000-06-27 | France/Scott Fetzer Company | Timer |
US6137067A (en) * | 1999-06-15 | 2000-10-24 | France/Scott Fetzer Company | Pushbutton hand dryer timer |
US6583371B1 (en) | 2001-11-02 | 2003-06-24 | France/Scott Fetzer Company | Timer |
US6613991B1 (en) | 1999-08-02 | 2003-09-02 | France/Scott Fetzer Company | Timer |
US20040090871A1 (en) * | 1999-08-02 | 2004-05-13 | France/Scott Fetzer Company | Timer |
US20090046540A1 (en) * | 2007-08-16 | 2009-02-19 | Norm Pacific Automation Corp. | Automatic timing control device case |
US8188390B1 (en) * | 2010-03-24 | 2012-05-29 | Hasbro, Inc. | Electromechanical toy with momentary actuator dual purpose cam mechanism preserving battery life |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2839623A (en) * | 1956-01-23 | 1958-06-17 | Int Register Co | Time switch mechanism |
US2971143A (en) * | 1957-01-18 | 1961-02-07 | Murray Corp | Laundry appliance motor control |
US3264441A (en) * | 1964-10-22 | 1966-08-02 | Mallory & Co Inc P R | Push to start mechanism |
-
1971
- 1971-12-27 US US00212139A patent/US3737595A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2839623A (en) * | 1956-01-23 | 1958-06-17 | Int Register Co | Time switch mechanism |
US2971143A (en) * | 1957-01-18 | 1961-02-07 | Murray Corp | Laundry appliance motor control |
US3264441A (en) * | 1964-10-22 | 1966-08-02 | Mallory & Co Inc P R | Push to start mechanism |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3866002A (en) * | 1973-10-15 | 1975-02-11 | Mallory & Co Inc P R | Dual-function line switch for a cam-actuated timer switch |
US4991155A (en) * | 1989-03-20 | 1991-02-05 | Sharp Corporation | Timer |
US6137067A (en) * | 1999-06-15 | 2000-10-24 | France/Scott Fetzer Company | Pushbutton hand dryer timer |
US20040079624A1 (en) * | 1999-08-02 | 2004-04-29 | France/Scott Fetzer Company | Timer |
US6613991B1 (en) | 1999-08-02 | 2003-09-02 | France/Scott Fetzer Company | Timer |
US6080943A (en) * | 1999-08-02 | 2000-06-27 | France/Scott Fetzer Company | Timer |
US20040090871A1 (en) * | 1999-08-02 | 2004-05-13 | France/Scott Fetzer Company | Timer |
US6797897B2 (en) | 1999-08-02 | 2004-09-28 | France/Scott Fetzer Company | Timer |
US6838628B2 (en) | 1999-08-02 | 2005-01-04 | France/Scott Fetzer Company | Timer |
US6583371B1 (en) | 2001-11-02 | 2003-06-24 | France/Scott Fetzer Company | Timer |
US20090046540A1 (en) * | 2007-08-16 | 2009-02-19 | Norm Pacific Automation Corp. | Automatic timing control device case |
US7671287B2 (en) * | 2007-08-16 | 2010-03-02 | Norm Pacific Automation Corp. | Automatic timing control device case |
US8188390B1 (en) * | 2010-03-24 | 2012-05-29 | Hasbro, Inc. | Electromechanical toy with momentary actuator dual purpose cam mechanism preserving battery life |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PARAGON ELECTRIC COMPANY, INC., 606 PARKWAY BLVD., Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMF INCORPORATED, A NJ CORP.;REEL/FRAME:004484/0357 Effective date: 19851112 |
|
AS | Assignment |
Owner name: STATE OF WISCONSIN INVESTMENT BOARD, WISCONSIN Free format text: SECURITY INTEREST;ASSIGNOR:PARAGON ELECTRIC COMPANY, INC. (FORMERLY KNOWN AS PECO-TOW RIVERS, INC.);REEL/FRAME:004546/0955 Effective date: 19860319 Owner name: STATE OF WISCONSIN INVESTMENT BOARD, 121 EAST WILS Free format text: SECURITY INTEREST;ASSIGNOR:PARAGON ELECTRIC COMPANY, INC. (FORMERLY KNOWN AS PECO-TOW RIVERS, INC.);REEL/FRAME:004546/0955 Effective date: 19860319 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES) |
|
AS | Assignment |
Owner name: PARAGON ELECTRIC COMPANY, INC., WISCONSIN Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:STATE OF WISCONSIN INVESTMENT BOARD;REEL/FRAME:005463/0773 Effective date: 19900730 |
|
AS | Assignment |
Owner name: BANKERS TRUST COMPANY, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:PARAGON ELECTRIC COMPANY, INC. A CORP. OF WISCONSIN;REEL/FRAME:005758/0169 Effective date: 19900730 |