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Publication numberUS3221117 A
Publication typeGrant
Publication dateNov 30, 1965
Filing dateSep 9, 1963
Priority dateSep 9, 1963
Publication numberUS 3221117 A, US 3221117A, US-A-3221117, US3221117 A, US3221117A
InventorsSimmons Harold T
Original AssigneeMallory & Co Inc P R
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable cam time sequence control
US 3221117 A
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Description  (OCR text may contain errors)

Nov. 30, 1965 H. T. SIMMONS 3,221,117

ADJUSTABLE CAM TIME SEQUENCE CONTROL Filed Sept. 9, 1963 INVENTOR.

HA T SIMMONS FIG. 2

ATTORN United States Patent P 3,221,117 ADJUSTABLE CAM TIME SEQUENCE CONTROL Harold T. Simmons, Indianapolis, Ind., assignor to P. R. Mallory & Co., Inn, Indianapolis, Ind., a corporation of Delaware Filed Sept. 9, 1963, Ser. No. 307,635 7 Claims. (Cl. 200--38) This invention relates generally to cam operated timing devices useful in carrying out predetermined functions and/ or operations in accordance with a selective program and more particularly to a device capable of being adjusted to a variation of time sequences.

While most similar switch actuating devices are designed for use in automatic washing machines, dishwashers, clothes dryers, etc., the present invention lends itself to many other applications where an electrically timed sequence is required, for example, in vending machines of the liquid dispensing type.

Other types of adjustable switches require a certain amount of guesswork in setting the cams in desired relationship to each other and these usually require some sort of tool to facilitate setting.

It is an object of the present invention therefore, to provide a device having a means for very close incremental cam settings such as 1 variations.

It is another object of this invention to provide a device wherein the cams can be set in varying relationship to each other without the use of too-ls. It is another object of this invention to provide a versatile switch actuating means whereby the cams can be set quickly and ac curately.

It is still another object of this invention to provide a switch actuating means having a plurality of toothed cam sets whereby the center cam which is rigidly fixed to the rotatable shaft, can be used to carry out a repetitive cycle while the outside or moveable cams can be adjusted to provide variable cycles.

In practice, adjustment of the cams is made by axially disengaging the teeth of the end cams from the mating teeth on the faces of the center driving cam and rotating the adjustable cams to the required setting. The cam teeth are biased back into engagement by springs located on each side of a cam set. It is contemplated that the switch actuating means will be driven by an electric motor. Accordingly, the invention resides in the features of construction .and arrangement of parts. However, since various embodiments of the invention are conceivable without departing from the spirit thereof it is intended that the description and drawings be considered as illustrative only and not limiting in scope.

In the drawings:

FIG. 1 shows an exploded perspective view of one embodiment of my invention including a typical electric motor driving mechanism as well as the outline of a single snap-action switch, the actuation of which is representative of a use for my invention.

FIG. 2 is a cam and shaft assembly showing a plurality of cam sets biased in their operating positions by a plurality of springs and one ca-m set separated axially on the shaft in position for making a cycle adjustment.

FIG. 3 is a cross-section view of a typical snap switch showing the rivctless construction comprising two integral eyelet-like bosses. While I have emphasized the novelty and description of the adjustable cams, it will be understood that a complete assembly may contain a combination of conventional cams as presently known and adjustable cams as per the instant invention.

Generally speaking, the construction of the present time sequence control comprising individually adjustable cam sets, fixed sequence cams and unitary switches fulfills a need not heretofore met by existing or prior art. The

3,221,117 Patented Nov. 30, 1965 individual switching stations of the present invention are so constructed that adjustments are now possible by hand manipulation, eliminating the need for various tools as well as parts such as set screws, nuts, washers, etc. These features in the present control are further enhanced by obviating the need for an interval stepping mechanism thereby reducing the cost considerably by the use of a constant speed driving mechanism. Also by staggering the positions of the individual switches it is possible to accommodate more switching stations by utilizing both sides of the control assembly. While the embodiment shown in the drawings also represents a single gang ver- $1011 of my invention, it will be apparent to those skilled in the art that by extending the housing components and utilizing a means of connection such as gears or belts, a multiple gang embodiment can be constructed according to the principles of the invention.

The timing device includes suitable driving means; for example, a clock motor 10 which is not shown in detail since the construction thereof is irrelevant. The clock motor 10 is fastened to an end plate 12 through which the shaft coupling sleeve 11 protrudes to cooperate with cam shaft assembly 14a and floating shaft extension 33 which are connected through a spring clutch 13 to cam shaft assembly 14a. The cam shaft 14 carries a plurality of cam sets, each consisting of a driving cam 15 fixed in position both radially and axial-1y to cam shaft 14, a pair of driven cams 16 and 17 aligned axially on hub 18 of driving cam 15 and held in rotating engagement therewith by springs 19. The driving cam 15 contains a full circle of gear-like teeth 20 on both faces which cooperate with corresponding gear-like teeth 21 on driven cams 16 and 17. Switch mounting plates 22 consist of channel-like strips each having a plurality of perforated switch mounting apertures. Individual switches 23 are mounted at each station by means of eyelet-like bosses 24 formed integral to the switch housing section 25. The bosses are inserted through the perforated channel strip and may be heat staked on the opposite side. The switch itself is held together by similar eyelet-like bosses 26 on switch housing section 25 and may be heat staked as shown in FIG. 3. The unit is considered complete with the assembly of a plate 27 which is similar to plate 12 both of which are mounted to switch mounting channels 22 by screws 28 assembled into threaded apertures 29. Both plates 12 and 27 contain two or more elongated arcuate slots 30 to facilitate radial adjustment of switch mounting channels 22. Reverse manipulation of the shaft 14 is prevented by the use of clutch springs 13 and 32. From the foregoing description of the present invention in conjunction with the accompanying drawings, it will be evident that the invention provides an improved time sequence control featuring ruggedness, simplicity and low cost without sacrificing quality and efiicient operation.

I claim:

1. In combination, a timing mechanism for sequentially actuating a plurality of switching devices comprising: a motor, said motor activating a shaft through a pair of spring clutches, said clutches permitting rotation of said. shaft in one direction only, said shaft having placed thereon a plurality of adjustable cam sets having predetermined functional contours, said cam sets including a driven cam fixedly connected to said shaft and a plurality of cams having a floating characteristic on said shaft, each of said cams in said cam sets having gear-like teeth on the faces thereof, spring means urging engagement of said gear-like teeth of each of said cams of said cam sets, said gear-like teeth being adapted to provide fine incremental setting of said functional contours at predetermined angles as said cams having a floating characteristic on said shaft are manually displaced with respect to said fixed cam of said cam sets, and a plurality of snap action switches individually riding on said functional contours of said cams whereby on rotation of said cams by said motor, said contours of said cams actuate adjacent snap action switches, said snap action switches mounted on a frame for said combination by means integral to said snap action switches.

2. In combination, a timing mechanism for sequentially actuating a plurality of switching devices comprising: a motor, said motor activating a shaft through a pair cf spring clutches, said clutches permitting rotation of said shaft in one direction only, said shaft having placed thereon a plurality of adjustable cam set-s having predetermined functional contours, said cam sets including a driven cam fixedly connected to said shaft and a plurality of cams having a floating characteristic on said shaft, said drive cam centrally located within said cam set, each of said cams in said cam sets having gear-like teeth on the faces thereof, spring means urging engagement of said gear-like teeth of each of said cams of said cam sets, said gear-like teeth being adapted to provide fine incremental setting of said functional contours at predetermined angles as said cams having a floating characteristic on said shaft are manually displaced with respect to said fixed cam of said cam sets, and a plurality of snap action switches individually riding on said functional contours of said cams whereby on rotation of said cams by said motor, said contours of said cams actuate adjacent snap action switches, said snap action switches mounted on a frame for said combination by means integral to said snap action switches.

3. In combination, a timing mechanism for sequentially actuating a plurality of switching devices comprising: a motor, said motor activating a shaft through a pair of spring clutches, said clutches permitting rotation of said shaft in one direction only, said shaft having placed thereon a plurality of adjustable cam sets having predetermined functional contours, said cam sets including a driven cam fixedly connected to said shaft and two cams having a floating characteristic on said shaft, said fixed cam positioned between said two cams having a floating characteristic, each of said cams in said cam sets having gear-like teeth on the faces thereof, spring means urging engagement of said gear-like teeth of each of said cams of said cam sets, said gear-like teeth being adapted to provide fine incremental setting of said functional contours at predetermined angles as said cams having a floating characteristic on said shaft are manually displaced with respect to said fixed cam of said cam sets, and a plurality of snap action switches individually riding on said function-al contours of said cams whereby on rotation of said cams by said motor, said contours of said cams actuate adjacent snap action switches, said snap action switches mounted on a frame for said combination by means integral to said snap action switches.

4. In combination, a timing mechanism for sequentially actuating a plurality of switching devices comprising: a motor, said motor activating a shaft, said shaft having placed thereon a plurality of adjustable cam sets having predetermined functional contours, said cam sets including a driven cam fixedly connected to said shaft and a plurality of cams having a floating characteristic on said shaft, each of said cams in said cam sets having gear-like teeth on the faces thereof, spring means urging engagement of said gear-like teeth of each of said cams of said cam sets, said gear-like teeth being adapted to provide incremental setting of said functional contours at predetermined angles as said cams having a floating characteristic on said shaft are displaced with respect to said fixed cam of said cam sets, and a plurality of switches individually riding on said functional contours of said cams, contours of said cams for actuating said switches.

5. In combination, a timing mechanism for sequentially actuating a plurality of switching devices comprising: a motor, said motor activating a shaft through a pair of spring clutches, said clutches permitting rotation of said shaft in one direction only, said shaft having placed thereon a plurality of adjustable cam sets having predetermined functional contours, said cam sets including a driven cam fixedly connected to said shaft and a plurality of cams having a floating characteristic on said shaft, each of said cams in said cam sets having means for interconnecting said cams of said cam set with other cams of said cam set, on the faces thereof, spring means urging engagement of said means for interconnecting said cams of said cam sets, said means for interconnecting said cams adapted to provide fine incremental setting of said functional contours at predetermined angles as said cams having a floating characteristic on said shaft are manually displaced with respect to said fixed cam or said cam sets, and a plurality of snap action switches individually riding on said functional contours of said cams whereby on rotation of said cams by said motor, said contours of said cams actuate adjacent snap action switches, said snap action switches mounted on a frame for said combination by means integral to said snap action switches.

6. In combination, a timing mechanism for sequentially actuating a plurality of switching devices comprising: a motor, said motor activating a shaft, said shaft having placed thereon a plurality of adjustable cam sets having predetermined functional contours, said cam sets including a driven cam fixedly connected to said shaft and a plurality of cams having a floating characteristic on said shaft, each of said cams in said cam sets having means for interconnecting said cams of said cam set with other cams of said cam set on the faces thereof, means urging engagement of said means for interconnecting said cams of said cam sets, said means for interconnecting said cams adapted to provide incremental setting of said functional contours at predetermined angles as said cams having a floating characteristic on said shaft are displaced with respect to said fixed cam of said cam sets, and a plurality of switches individually riding on said functional contours of said cams, said contours of said cams for actuating said switches.

7. In combination, a timing mechanism for sequentially actuating a plurality of switching devices comprising: a motor, said motor activating a shaft, said shaft having placed thereon a plurality of adjustable cam sets having predetermined functional contours, said cam sets including a driven cam fixedly connected to said shaft and two cams having a floating characteristic on said shaft, said fixed cam positioned between said two cams having a floating characteristic, each of said cams in said cam sets having means for interconnecting said cams of said cam set with other cams of said cam set, spring means urging engagement of said means for interconnecting said cams of said cam sets, said means for interconnecting said cams adapted to provide incremental setting of said functional contours at predetermined angles as said cams having a floating characteristic on said shaft are displaced with respect to said fixed cam of said cam sets, and a plurality of switches individually riding on said functional contours of said cams, said contours of said cams for actuating said switches.

References Cited by the Examiner UNITED STATES PATENTS 2,852,957 9/1958 Breitenstein 74568 2,863,969 12/1958 Edmunds 200168 2,875,306 2/1959 Allen 200168 2,963,628 12/1960 Ostland 20038 3,033,949 5/1962 Hehl 20038 3,038,040 6/ 1962 Stolle et al. 20038 3,126,759 3/1964 Cook 20038 BERNARD A. GILHEANY, Primary Examiner.

ROBERT K. SCI-IAEFER, Examiner.

HIRAM B. GILSON, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2852957 *Aug 1, 1957Sep 23, 1958American Nat Bank And Trust CoAdjustable cam mechanism
US2863969 *Nov 19, 1956Dec 9, 1958Ite Circuit Breaker LtdBarriers for isolation of circuit breaker phases
US2875306 *Apr 19, 1957Feb 24, 1959Milli Switch CorpMounting means for switch units
US2963628 *May 8, 1957Dec 6, 1960Ncr CoSwitching sequencer
US3033949 *Aug 3, 1959May 8, 1962Arburg Feingeratefabrik O H GMultiple stage timing mechanism
US3038040 *Oct 14, 1957Jun 5, 1962Int Register CoTiming mechanism
US3126759 *Jul 15, 1960Mar 31, 1964 Timing mechanism for washing machines and like equipment
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3272932 *Sep 22, 1964Sep 13, 1966Mc Graw Edison CoCycle timer with adjustable arcuate cams
US3424877 *Jul 13, 1966Jan 28, 1969Mallory & Co Inc P RSwitch actuator means including a rapid advance mechanism
US3435388 *Dec 22, 1966Mar 25, 1969Hormann Frank RRotary electric current interrupter
US3436498 *Feb 15, 1967Apr 1, 1969Mallory & Co Inc P RFlex-shaft switch
US3446922 *Mar 30, 1966May 27, 1969Mallory & Co Inc P RCombined timer and rotary selector switch
US3454990 *Aug 12, 1966Jul 15, 1969Package Machinery CoControl switch actuating apparatus for a plastic injection molding machine or the like
US3487719 *Jun 18, 1968Jan 6, 1970Culligan IncCam-actuated timer assembly
US3558835 *Jun 26, 1968Jan 26, 1971Electrical Remote Control CoTiming device
US3649781 *Oct 23, 1970Mar 14, 1972Drutz Alvin SSelectively variable timer with improved integral clutch cam structure
US3656370 *Jul 2, 1970Apr 18, 1972Gen ElectricCam assembly having multiple cams with integral cam positioning means thereon
US3678225 *Apr 1, 1971Jul 18, 1972Gulf & Western IndustriesRepeat cycle timer of modular construction with improved adjustable cam
US3700838 *Apr 23, 1971Oct 24, 1972Mallory & Co Inc P RTimer utilizing spring clutch
US3775574 *Jan 26, 1973Nov 27, 1973Coe RWeekly cycle timing mechanism with shaft securing means for predetermined adjustable programming cam assembly
US3839925 *Apr 6, 1973Oct 8, 1974Umc IndAdjustable cam unit
US3852542 *Sep 14, 1973Dec 3, 1974S & C Electric CoAdjustable cam multiple contact switch arrangement
US4031339 *Dec 15, 1975Jun 21, 1977Amf IncorporatedModular time sequence controller
US4348568 *Oct 24, 1979Sep 7, 1982Eduard HermleSwitching mechanism
US5298700 *Jan 30, 1992Mar 29, 1994Neles-Jamesbury, Inc.Limit switch module and cam for use in the same
Classifications
U.S. Classification200/38.0BA, 74/568.00R
International ClassificationH01H43/04, H01H43/00
Cooperative ClassificationH01H43/04
European ClassificationH01H43/04