US3652814A - Reciprocating and rotatable cam actuating means for electromechanical timers - Google Patents
Reciprocating and rotatable cam actuating means for electromechanical timers Download PDFInfo
- Publication number
- US3652814A US3652814A US39751A US3652814DA US3652814A US 3652814 A US3652814 A US 3652814A US 39751 A US39751 A US 39751A US 3652814D A US3652814D A US 3652814DA US 3652814 A US3652814 A US 3652814A
- Authority
- US
- United States
- Prior art keywords
- cam
- cam element
- wheel
- unlocking
- projections
- 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
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
- G04C21/38—Adjusting the duration of signals
Definitions
- CONTACTS I4 CONTACTS l RECIPROCATING AND ROTATABLE CAM ACTUATING MEANS FOR ELECTROMECHANICAL TIMERS
- This invention relates to improvements in and relating to timer switch mechanism built in timepieces or time measuring instruments.
- a further conventional drawback is a considerable fluctuation in the alarming or the like destined operation.
- the main object of the invention is to provide an improved timer switch of the above kind, capable of obviating the aforementioned various conventional drawbacks.
- FIG. 1 is a schematic perspective view of a comparative conventional prior art switch mechanism.
- FIG. 2 is a similar view of FIG. 1, illustrative, however, of a preferred embodiment of the present invention.
- FIG. 3 is a substantially sectional view of a second embodiment of the invention which has been slightly modified from that shown in FIG. 2, wherein, however, certain minor parts have been omitted for simplicity.
- FIG. 4 is a plan view of an upper cam element.
- FIG. 5 is a plan view of a lower cam element which cooperates with the upper cam element shown in FIG. 4.
- FIG. 6 is a plan view of an unlocking cam wheel employed.
- FIG. -7 A-C are exploded perspective views of the three parts shown in FIGS. 4-6.
- FIG; 8, (A)-(D), are a series of explanatory sectional representations of the switching operational stages of the mechanism.
- FIG. 9 is a chart showing the operational sequence of the mechanism illustrated in FIG. 8 (A)-(D).
- the numeral 10 denotes a conventional unlocking wheel which is arranged to cooperate through an intermediate gear 11 with an unlocking cam wheel 12, a pair of separated positioning openings 12a and 12a being bored through the cam wheel 12 and at a certain common diametral distance measured from the center of the latter wheel.
- a shaft 18 extends vertically from a conventional lower plate, not shown, of a timepiece movement, again not shown, and the unlocking cam wheel 12 is rotatably mounted on the shaft.
- an hour wheel assembly Concentrically with the cam wheel, an hour wheel assembly, generally shown at 13, is loosely mounted on the shaft, said hour wheel assembly comprising a hollow stem 13a and an hour cam wheel 13b fixedly united together.
- cam projections 13d and 13d On the bottom surface of the hour cam wheel 13b, there is fixedly provided a pair of cam projections 13d and 13d having a mutual circumferential pitch equal to that defined between the positioning openings 12a and 12a, the cam projections being adapted for occasional engagement with the openings 12a and 12a.
- a stationary mount 90 made of an insulating material is fixedly mounted on the lower plate and mounting thereon in turn a movable spring contact 140 and a stationary spring contact 140' by embedding or screwing their root portions in or to the material of the mount 90.
- These spring contacts 140 and 140' are shaped into hooks as shown and the upper or movable contact 140 is so designed and arranged that the bent or sharply curved portion of the hook is kept normally in pressure contact with the upper surface of stem 13a for urging the hour wheel assembly 13 to move downwards in FIG. 1.
- Contacts 140 and 140' are electrically connected with leads 91 to a certain electric circuit (not shown) to be controlled and a power source (not shown) therefor, although not specifically shown.
- unlocking wheel 10 When the unlocking wheel 10 is rotated manually in the direction shown by a small arrow, motion is transmitted therefrom through intermediate gear 11 to unlocking cam wheel 12, thereby the latter being rotated in counter clockwise direction in FIG. 1 until an aimed alarm time is preset.
- FIG. 2 a preferredembodiment of the invention shown only schematically will be described in detail.
- 10' denotes an unlocking wheel similar to that shown at 10 in FIG. 1, which is provided for presetting manually any desired alarm time point.
- 15 represents generally an unlocking cam wheel which is rotatably mounted on a vertical shaft 18 extending rigidly from the lower plate (see, also FIG. 3), said wheel 15 being kept in direct engagement with the unlocking wheel 10.
- the unlocking cam wheel 15 is formed with a pair of somewhat elongated and curved slots 15a and 15a (see also FIGS. 6 and 7C) having different diametral distances and preferably different peripheral lengths from each other.
- a first cam element 16 substantially in the outline form of a gear is rotatably mounted and meshing with a conventional hour hand wheel 19 arranged to be driven by the time-indicating gear train.
- the first cam element 16 is formed with a concentric hollow cylinder 16c (see also FIG. 7B) and a pair of cam projections 16a and 16a rigid with the cam wheel proper and each having a substantially triangular shape, when seen in FIG. 8 at (A).
- the first cam wheel 16 is further formed with a pair of positioning segmental slots 16b and 16b as shown in FIG. 7B.
- the cam projection 16a depends from the bottom surface of the lower or first cam element 16 and is adapted for engagement with the first slot 15a. In the similar way, the other cam projection 16a is arranged for occasional engagement with the remaining cam slot 15a. As seen especially from FIG. 5, the cam projections 16a and 16a are positioned in close proximity to the segmental slots 16b and 16b, respectively.
- Cam projections 16a and 16a are arranged in diametral opposition to each other, while positioning slots 16b and 16b are positioned again in diametral opposition to each other, as shown in FIG. 5.
- the upper or second cam element 17 comprises a ring 170 having an internal diameter so as to be slid onto the cylindrical part of the lower cam element 16 and is formed with a pair of separated positioning projections 17b and 17b, each having an overall configuration and dimension so as to be slid into segmental openings 16b and 16b, respectively.
- the assembled relative position of these three parts 15, 16 and 17 rotatably supported on the shaft 18 may most clearly be seen from FIG. 3 by consultation with F lG. A-D.
- FIG. 2 there are provided a movable spring contact 14 and a spring contact 14' which are similar to those shown at 140 and 140, respectively in FIG. 1, said both contacts being fixedly mounted as before on an insulating mount 20 which is similar in its design and function to that shown at 90 in FIG. 1. Electric leads 105 similar to those at 91 are also provided. It should, however, be noted that the corresponding parts 14, 14, 20, 103 and 104 are somewhat modifiedly arranged in FIG. 3 from FIG. 2.
- the fixing bolt 103 in FIG. 3 passes through movable contact 14, insulating separator 104, stationary contact 14' and the central bore at 20a of mount 20, said bolt having threaded part 103a screwed into a tapped hole 102a bored through the lower plate at 102.
- the opening in contact 14' through which bolt 103 passes is sufficiently large as shown at 104 to prevent electrical contact therebetween to eliminate any possibility of an electrical short.
- the movable contact 14 is shaped again into a hook and kept into pressure contact with the upper surface of cylindrical stem 160 so as to urge the first cam element 16 for downward movement thereof, and the equally hook-shaped contact 14' is kept into pressure engagement with the upper surface 170 of upper cam element 17.
- Contacts 14 and 14 are provided at their respective ends with hard contacting elements 14a and 14a, respectively, as known per se.
- the unlocking wheel is manually turned as desired, as was referred to with relation to FIG. 1 concerning the wheel 10, so as to turn the cam wheel to a certain point.
- slots 15a and 150' are positioned for the aimed alarm service and relative to cam projections 16a and 16a,
- cam projections 16a and 16a are brought into engagement with slots 15a and 15a, respectively and the spring urging pressure exerted by the movable contact 14 becomes effective to urge the cam element 16 for downward movement thereof and at the same time, the movable contact proper 14a is brought into contact with the mating contact point 14a so that the switching mechanism changes over to its on"-position.
- cam projections 17b; 17b are brought into engagement with slots 15a; 15a, respectively, thus the lower contact being lowered in its position and the hitherto established contact between contact points 14a and 14a being instantly released by the action of the spring force.
- the above stage corresponds to B-C in F IG. 8.
- the contacting stroke of the spring contacts 14a and 14a is determined by the distance between the slots 16b and 16b. Therefore, it is recommendable to provide variously dimensioned cam elements 16 for specific operational services, adapted for use, as an example, in 30 minutes, hour, 2 hour services, respectively.
- cam projections 16a; 16a will commence to recede from engagement with respective slots 15a; as shown in FIG. 8(D).
- the relationship between the contacts 14 and 14' is such that the upper spring contact 14 exerts a downward urging pressure upon the upper surface 16d of cam element 16.
- the lower spring contact 14' is kept in pressure contact with the upper surface 17c of cam element 17, the mutual distance between the cam elements 16 and 17 is not altered, because cam projections 16a; 16a will only slide along the upper surface of the unlocking cam wheel 15 with continued rotational movement of the cam element 16. Therefore, an undesirous contact between contact springs 14a and 14a is positively prevented.
- cam projections 16a and 16a will be brought again into engagement with the respective reception openings.
- each pair of slots 15a; 15a, cam projections 16a; 16a, positioning slots 16b; 16b, and cam projections 17b; 17b which serves for the prevention of any relative inclination between the cam elements 16 and 17.
- an accurate cooperation between hour hand wheel 19 and hour cam 16 will be positively assured and the on-off control operation of the movable height H of cylindrical stem 16c of cam element 16 minus the thickness h of the ring part of the element 17. Therefore, the contact points 144 and 14a is kept in separation from each other.
- (A) represents the open stage of the mechanism, while (B) represents its closing stage where the operation is abruptly and suddenly performed.
- the both contacts 14 and 14' are positioned in contact respectively with the cam elements 16 and 17.
- the mutual distance is defined by h" which equals to a difference between the symbols 15" and F" of FIG. 9 correspond respectively to the tip contacting ends of the spring contacts 14 and 14'.
- the positioning projections 17b and 17b of the second cam element 17 are urged against the side wall of the slots 16b and 16b of the first cam element 16 to drop the positioning projections 17b and 17b into slots 15a and 15a, as shown in FIG. 8(C), the stationary contact 14a to be lowered by the height of h to restore instantaneously to the normal space (H).
- a timer controlled switch assembly comprising, a rigid base member having a support shaft rigidly attached thereto, an unlocking cam wheel rotatably mounted on said support shaft, said unlocking wheel being operatively connected with a manually rotatable time setting wheel, said unlocking cam wheel having a plurality of camming slots formed on a side surface thereof, each of said camming slots being of a predetermined arcuate length and being positioned at a different radial distance from the center of said unlocking cam wheel, a first cam element rotatably supported on said support shaft adjacent said unlocking cam wheel, the surface of said first cam element facing said unlocking cam wheel having a plurality of cam projections formed thereon, said cam projections corresponding, respectively, with each of said camming slots formed in the adjacent surface of said unlocking cam wheel, said first cam element further including a plurality of segmental slots formed therethrough, each of said segmental slots positioned adjacent the projected end portions of said cam projections, a concentric hollow cylinder secured to the surface of said first cam element opposite said
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Measurement Of Predetermined Time Intervals (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP44040075A JPS5013951B1 (es) | 1969-05-23 | 1969-05-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3652814A true US3652814A (en) | 1972-03-28 |
Family
ID=12570791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US39751A Expired - Lifetime US3652814A (en) | 1969-05-23 | 1970-05-22 | Reciprocating and rotatable cam actuating means for electromechanical timers |
Country Status (4)
Country | Link |
---|---|
US (1) | US3652814A (es) |
JP (1) | JPS5013951B1 (es) |
DE (1) | DE2025325A1 (es) |
FR (1) | FR2049121B1 (es) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3790726A (en) * | 1972-06-12 | 1974-02-05 | Mallory & Co Inc P R | Cam operated electrical timer assembly with improved contact and associated peripheral rib cam |
US3935404A (en) * | 1974-10-21 | 1976-01-27 | Holger Persson | Timer switch assembly |
US5889243A (en) * | 1994-01-28 | 1999-03-30 | France/Scott Fetzer Company | Time switch with clutch mechanism and cam operated contacts |
US20080176868A1 (en) * | 2005-06-14 | 2008-07-24 | Schering Corporation | Preparation and use of compounds as protease inhibitors |
CN113223894A (zh) * | 2021-05-08 | 2021-08-06 | 深圳市优一像电子有限公司 | 一种led灯具无线控制开关及其控制模块操作方法 |
US11268605B2 (en) * | 2019-06-27 | 2022-03-08 | Canon Kabushiki Kaisha | Composite gear, cartridge, image forming apparatus, mold, and manufacturing method for composite gear |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2512775A (en) * | 1946-10-23 | 1950-06-27 | Anthony J Parissi | Signaling device |
US2617900A (en) * | 1950-03-29 | 1952-11-11 | Paragon Electric Company | Refrigerator defrosting timer |
US3204052A (en) * | 1963-07-23 | 1965-08-31 | Mallory & Co Inc P R | Motor-driven cam-actuated electrical time switch mechanism |
-
1969
- 1969-05-23 JP JP44040075A patent/JPS5013951B1/ja active Pending
-
1970
- 1970-05-22 US US39751A patent/US3652814A/en not_active Expired - Lifetime
- 1970-05-23 DE DE19702025325 patent/DE2025325A1/de active Pending
- 1970-05-25 FR FR707018945A patent/FR2049121B1/fr not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2512775A (en) * | 1946-10-23 | 1950-06-27 | Anthony J Parissi | Signaling device |
US2617900A (en) * | 1950-03-29 | 1952-11-11 | Paragon Electric Company | Refrigerator defrosting timer |
US3204052A (en) * | 1963-07-23 | 1965-08-31 | Mallory & Co Inc P R | Motor-driven cam-actuated electrical time switch mechanism |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3790726A (en) * | 1972-06-12 | 1974-02-05 | Mallory & Co Inc P R | Cam operated electrical timer assembly with improved contact and associated peripheral rib cam |
US3935404A (en) * | 1974-10-21 | 1976-01-27 | Holger Persson | Timer switch assembly |
US5889243A (en) * | 1994-01-28 | 1999-03-30 | France/Scott Fetzer Company | Time switch with clutch mechanism and cam operated contacts |
US20080176868A1 (en) * | 2005-06-14 | 2008-07-24 | Schering Corporation | Preparation and use of compounds as protease inhibitors |
US11268605B2 (en) * | 2019-06-27 | 2022-03-08 | Canon Kabushiki Kaisha | Composite gear, cartridge, image forming apparatus, mold, and manufacturing method for composite gear |
CN113223894A (zh) * | 2021-05-08 | 2021-08-06 | 深圳市优一像电子有限公司 | 一种led灯具无线控制开关及其控制模块操作方法 |
CN113223894B (zh) * | 2021-05-08 | 2022-07-05 | 深圳市优一像电子有限公司 | 一种led灯具无线控制开关及其控制模块操作方法 |
Also Published As
Publication number | Publication date |
---|---|
DE2025325A1 (de) | 1970-11-26 |
FR2049121B1 (es) | 1974-03-01 |
JPS5013951B1 (es) | 1975-05-23 |
FR2049121A1 (es) | 1971-03-26 |
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