US2288636A

US2288636A - Control device

Info

Publication number: US2288636A
Application number: US322983A
Authority: US
Inventors: Homer E Malone
Original assignee: Perfex Corp
Current assignee: Perfex Corp
Priority date: 1940-03-08
Filing date: 1940-03-08
Publication date: 1942-07-07
Anticipated expiration: 1959-07-07

Description

July 7, 1942. H, E, MALQNE 2,288,636

CONTROL DEVICE Filed March 8, 1940 2 Sheets-Sheet 1 INV EN 1 OR.

Hamel Ell-fahne BY &3?

W mom.

July?, 1942.

H, E. MALONE vf/2,288,636

CONTROL DEVICE Filed March 8, 1940 2 Sheets-Sheet 2 zu' D INVENTOR Hamer EME/Zane BY n I n @g1-roman'.

l provide a new and ily andA easily by the `wherein the user may Patented July 7, 1942 2,288,636 CONTROL DEVICE Homer E. Malone, Mi

Perfex Corporation, ration of Wisconsin lwaukee, Wis., assignor to Milwaukee, Wis.,` a corpo- Application March 8, 1940, Serial No. 322,983

(Cl. 20G-38) 11 Claims.

The invention relates generally to time switch mechanisms and more particularly it relates to a time switch mechanism of the clock type having adjustable means whereby the time of actuation of the switch mechanism may be readily varied.

The primary object of the present invention is to provide a new and improved time switch device of this character which is adaptable for use with a wide variety of control devicesand to satisiy a wide variety of desirable control requirements.

Another object of the present invention is to improved time switch' mechanism wherein a novel disposal of the various cornponent elements results in an unusually compact and effective unit.

Another object is to provide a time switch device or" this character wherein a single annular time indicating scale serves both as a guide for accurately adjusting the time of switch actuation and as a time indicator whereby the time may be easily ascertained.

A further object of the invention is to provide such a time switch mechanism wherein adjustment of the time switc.. actuation is rendered more convenient.

A further object of the invention is to provide a time switch of this character having an improved and simplified mounting structure for the settable switch actuating elements.

A more specic object of the invention is to provide such a time switch mechanism wherein the settable switch actuating elements are of an improved and eimpliiied form, and are of such a character that these by a simple operation with one hand.

Another object is o-provide such a time switch in which a relatively large number of switch operations may be attained during the twentyfour hours of the clay, and in which the 'requisite supplemental actuating elements required for such added operations may be incorporated readuser.

Another object is to provide such a time switch mechanism having a new, improved and simpli- 'led means for securing the enclosing housing in position.

Another object is to elements may be adjusted which may be performed provide such a time switch readily shift the switching means from one position to the other, whereby, to simplify the setting of the time switch mechanism.

Other objects and advantages reside in certain novel features of construction, arrangement and combination of variousparts which will be hereinafter more fully described and particularly pointed out in the claims.

In the drawings: l

Fig. 1 is a relatively small perspective view showing the outer appearance ofy a timer embodying the features of the invention.

Fig. 2 is an enlarged front elevational view of the timer of Fig. 1, the enclosing cover being removed to show details of operating mechanism Fig. 3 is a side elevational view taken from the right hand side of Fig. 2.

Fig. 4 is an enlarged perspective view of the adjustable mounting actuating element or dog with the parts shown in separated and extended relation, and with the supporting discs shown in relation thereto.

Fig. 5 is a fragmental sectional view taken along the line 5 5 of Fig. 2, and showing the manner in which the actuating dogs are mounted on the clock mechanism, and the manner in which the actuating dogs are operatively related to the switch mechanism.

Fig. 6 is a fragmental portion of Fig. 5 illustrating the manner in which an actuating dog is placed in position on the clock mechanism.

Fig, 7 is a fragmental front elevational view illustrating the relation of one of the actuating dogs to the switch mechanism.

Fig. 8 is a view similar to Fig. 7 and illustrating the other type or form of actuating dog in its operative relation to the switch mechanism.

Fig. 9 is a schematic wiring diagram illustrating one manner in which the timer of the present invention may be utilized. i

While I have illustrated in drawings and will herein describe'in detail but a single embodiment of the present invention, it will be understood that various modifications and alternative arrangements may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

lated box-like casing element l2 to form an enclosure or chamber I3 within which the operating elements of the mechanism are housed. Generally considered, the operating mechanism of the present device comprises a clock I4 mounted on the base Il and adapted to cooperate vided substantially along the shown, is formed from a sheet metal stamping of generally rectangular form having three centrallybored rubber mounting feet I1 adjacent its two lower corners and centrally of its upper edge, these mounting feet being arranged to project from therear side thereof. The mounting feet YI1 extend through suitable holes in the base in a grommet-like relation and are adapted to have mounting screws projected through their central bores to secure the base in the desired relation to a support. The base II also carries a pair of upstanding sheet metal brackets I8 adjacent the bordering edge of the base, each of these brackets having a relatively large opening which is normally closed by means such as a rubber knock-out grommet I9 through which the ing wires may be threaded into the chamber I3 The cover I2 has its side wall cut out or slotted as at 20 to clear the openings which may be provided in the rubber grommets I On the forward face of the base II, and in spaced relation thereto, an insulating mounting plate 2I is supported by spacing sleeves and

screws

22 and 23, this mounting plate 2I being of generally rectangular lorm` and slightly smaller than the base II and being positioned on thebase plate II so as to provide clearance opposite the mounting feet I1 thereby to permit convenient insertion of the required fastening screws.

In accordance with the present invention, the clock mechanism I4, the switch mechanism I and the terminal means I8 are so related and disposed upon the mounting -plate 2| as to produce an unusually compact relationship of the device as a whole, while preserving adequate space about the terminals to permit convenient connection of the several leads thereto, and at the same time locating the various adjustable elements of the timer in convenient and readily accessible positions. In attaining this desirable relationship the present invention provides for the mounting of the clock mechanism within an area which comprises substantially one half d ,of the generally rectangular base 2|, this clock mounting area 25 in the present instance lying between a transverse division line 26 (Fig. 2) and the lower end of the mounting plate 2l. With the clock mechanism I4 mounted in the area 25, the switch mechanism I5 is, in all of its principal and bulky elements, mounted in a switch mounting area 28 which comprises substantially one quarter'of the area of the mounting plate 2I- and is defined the upper end of the mounting plate 2I and a Acentrally located longitudinal division line indicated at 29. The terminal means I6 is located in a terminal mounting area 38 which is dened by the division lines 26 and 28 and the adjacent side and end edges of the mounting plate 2I. Preferably the two grommet brackets I8 are mounted adjacent the terminal mounting area 30 as at the bordering side and end edges thereof. With this convenient and advantageous arrangement or disposal of the several elements, the actuating connection between the clock mechanism and the switch mechanism is prodivision line 26.

desired connect- A between the line 28,

mechanism I5 which nism I5 isof such a character that it is yshifted between two positions by the clock mechanism I4 and, in order that the actuating connection between the clock and the switching mechanism may be relatively simple in character, the switch mechanism `I5 is preferably constructed so that after it has been shifted from one position to the other by the clock mechanism it will maintain its shifted position until an opposite shifting movement is imparted thereto by the clock mechanism. While this action may be attained in different ways, the present embodiment is'such that the switch mechanism is held in either of its positions by magnetic means. The switch mechanism I5 as herein shown comprises a pair of bridging switch assemblies each constructed along the lines of the switch mechanism illustrated and `opposing stationary contacts.

'2 I The supporting erally at right angles claimed in my copending application, Serial No. 321,822, filed March 2, 1940. These two bridging switch assemblies are mounted on a common supporting structure 3l pivoted on a stud 32 which projects upwardly from the mounting plate member 3! comprises a sheet metal stamping in the general form of a bell crank having two

arms

33 and 34 disposed gento each other and having a pair of spaced integral ears 35 projecting from the juncture of the two

arms

33 and 34 and apertured to cooperate with the pivot pin or stud 32. On the arm 33 of the bell crank an insulating block or plate 36 is secured and it is upon this insulating block 35 that the two bridging switch structures are supported. On opposite sides of the insulating block 36 a pair of magnetic armatures 31 are secured as by riveting so as to project in spaced relation beyond the end of the insulating block 35 on opposite sides of a permanent magnet 38 which is mounted in fixed position on the plate 2 I The two armatures 31 are so spaced and related to the magnet 38 that the switch supporting structure 3I may be rocked back and forth between two positions. has a pair of ears 39 formed adjacent its midpoint and on opposite edges thereof so as to project in spaced relation to support a bridging switch structure designated generally by the reference numeral 40. Each bridging switch structure preferably comprises a pressure bar 4I which is relatively rigid and has projecting mounting ears 42 at its midpoint, these mounting ears being positioned between `and pivotally related to the mounting ears 38 by means of pivot pin 43. The pressure bar 4I is adapted to carry,

at its opposite ends, a pair of movable contacts 44, and in the present form these movable contacts are so supported upon the pressure bar 4I as to provide for ayielding engagement and disengagement of the movable contacts with the For this purpose the pressure bar is slightly off-set as at 48 and a resilient bar 41 is secured to the outwardly projecting or off-set face of the pressure bar so that the resilient bar 41 is slightly spaced from the pressure bar 4I at its other end. The two movable .contacts 44 are supported on the opposite ends of the resilient bar.

The two movable contacts 44 of the left hand bridging structure 40 of Fig. 2 are adapted when shiftedV to the left to/engage a pair of stationary contacts 50, each contact 50 comprising an upstanding sheet metal bracket 5I iixed as by screws to the mounting plate 2| and through which a Contact screw 52 projects for engagement by its contact 44. By adjustment o f the In `the present device the switching mechascrew threaded contact elements 52 the relation- Each armature 3 1 to one terminal E8 accessoY ship of the elements may be so adiusted as to deiine each of the two positions of the switch struc- Each of these positions is preferably such that one of the armatures 31 is relatively close to but still out of contact with the permanent magnet 38, whereby to attain the desired snap action, and in defining this relationship the pressure bar 4| functions as a rigid bridging member. 'The other or right hand switching structure 438 cooperates and bridges a pair of similar stationary contacts 50'.

Preferably the switching structure is protected by an L-shaped insulating cover structure 55 which is secured to the mounting plate Zi and partially overlies the switching structure as indicated by the dotted outline in Fig. 2. Two oi? the contacts 50 and 58' are connected in series of the terminal means I6 by means of wires Si and 6| which extend through a wiring space 52 (Fig. 3) formed between the base plate il' and the mounting plate 2|; while another terminal 63 is similarly connected by wire 5d to the other iixed contact 58', and a third terminal 65 is similarly connected by wire 66 to vthe other xed contact 58. Thus when the switch mechanism is in its left hand position the two terminals 58 and 85 are bridged, while positioning of the switching structure in its right hand position causes bridging of the two terminals 68 and 83' it will be noted that in the present embodiment the terminal mounting area 38 contains but three terminals, but it will be apparent that additional terminals could be provided in this area if desired. Line voltage terminals lll and "il are herein provided, since the clock. mechanism it is in ,the present instance electrically actuated, and in order to segregate the two line voltage terminals 'i8 and li from the terminals dii, 83 and S5, which are often included in a low voltage control circuit, the present invention makes use of the insulating guard 55 which is positioned about the switch mechanism l5 in such a manner that this guard 55 functions in effect as an insulating barrier. To accomplish this result the mounting plate 2| has a projecting portion l' at itsv upper right hand corner as viewed in Fig. 2, this portion 2i' extending beyond the protecting housing or guard 55 and having the terminals 'i8 and it mounted thereon. An additional barrier between the high and low voltage terminals is provided'by an outwardly projecting barrier plate 55' secured to the base il and projecting outwardly to the same extent as the guard 55 and adjacent the upper edge thereof.

The terminals it and 1| are connected by wires 'i2 and 'i3 extending through the wiring space t2 to a selfstarting synchronous electric motor lll (Fig. 3) which forms a part of the clock mechanism of the present embodiment.

vIf desired, one of the wires, as the wire l2, may

include a manual switchmechanism 'I5 lhaving an actuating element l5 projecting forwardly of the mounting plate 2| so that the clock may be stopped during selected periods or seasons.

The clock mechanism 14 includes the usual gear train (not shown) terminating in a driven sleeve 76 which surrounds a re-set shaft TI, and the clock, mechanism of the present embodiment is such that the sleeve 16 makes one revolution.

in each twenty-four hours.

On the sleeve 16 the present invention provides a combined time-indicating and switch actuating mechanism which comprises a mounting disc 18 rigidly secured to the sleeve and a cooperating disc i9 which is mounted for rotation with disc 18. The disc 19 carries on its outer or forward face suitable indicia such as -a scale 19' divided in twenty-four equal parts which are numbered so as to be indicative of the twenty-four hours of the day. Suitable indicia is provided in associationwith the scale 19 to identify one half of the scale as pertaining to the hours between noon and midnight, and upon the other half to identify it as pertaining to the hours between midnight and noon. On the edge of the mounting disc 'lsuitable actuating dogs 80 and 8l are mounted for effecting timed shifting of the switch mechanism I5 back and forth between its two positions. It will vbe noted in Fig. 7 that the mounting disc 18 rotates in a clockwise direction and that the dog 88 has a cam surface 88' which in such rotation of the mounting disc `|8 engages and actuates a follower member 85, which is operatively associated with the switch mounting member 3|, so as to shift the follower 85 from the full line position of Fig. 7 to the dotted line position thereby to shift thek switch structure to the right. The actuating dog 8| has a similar but oppositely disposed cam surface 8|' which is operable upon the follower 85 from the upper position of Fig. 8 to the lower position, thereby to shift the switch structure to its left hand position. The operative connection between the follower 85and the switch mounting member 3| comprises in the present instance a resilient arm 86 which carries the follower 85 on one of its ends and is secured at its other end to the remote end of the arm 34 of the mounting structure 3|. Throughout a portion of its length the resilient arm 8G extends in generally parallel but spaced relation to the arm 34, and for purposes of calibration, a screw 8l extends through a hole in the arm B6 across the space between the arm 86 and the arm 34 and is threaded into the arm 34. With this mounting of the follower 85 the actuating cam surface of either the

dogs

88 or 8| act through the resilient connection formed by the arm 86 to build up a resilient switch actuating force in opposition to the restraining force of the magnet 38, so that the switch movements out in my aforementioned copending application.

It will be noted that the actuating arm 85 extends transversely across the mounting plate substantially along the division line 26 so as to be located in a protected relation and contribute to the compact and effective disposal ol parts which produces the convenient and compact relation in the present timer. Since the cam portion 8| of the dog 8| must, after actuation of the follower 85, pass the arm 86, the follower 85 projects forwardly from the arm 86 into the pathvof the cam 8|', the arm 86 being located rearwardly of the cam path as shown in Fig. 5.

In accordance with the present invention actuating dogs and 8| `are supported on the mounting disc i8 solely in the riphery so that a relatively large number of actuating dogs may be associated with the clock mechanism. The switch mechanism may therefore be actuated back and forth between its two positions a relatively large number of times in the twenty-four hour timing cycle of the clock. Moreover the present invention provides for convenient application of the actuating dogs area adjacent the pemay be readily afusted about the periphery of the mounting disc 18 in a simple operation which may be performed with one hand.

In attaining these desirable characteristics the lpresent yinvention provides an actuating dog which in its preferred form is constructed as shown in detail in Fig. 4 of the drawings. As therein shown each actuating dog comprises an angle member 88 'formed from sheet metal to providel an outer or front leg 88, adapted to extend along and against the front face of the mounting disc 18, and a rearwardly projecting leg 88 adapted to extendrearwardly past the periphery of the mounting disc 18; The rearwardly projecting 'leg 88 has an integral portion 88 which in accordance with the angle at which it is formed, provides the cam surface 88' or 8|'. For clamping the front leg 88' against the front face of the mounting disc 18 an inner or rear clamping arm 8| vis provided in generally parallel but edge of the disc 18. This annular surface |88 rearwardly spaced relation to the forward leg 88. This clamping arm 8| has an upwardly projecting lug or ear 82 at its upper end which extends lnto a slot 88 formed in the upper or `rearwardly projecting arm 88, thereby providing a pivotal connection between the clamping varm 8l and the forward leg 88. The two

members

88 and 8| thus constitute opposed clamping jaws, and clamping force is applied therebetween by means of a clamping screw 88, the enlarged and knurled head 88 of whichv is positioned on the outer face of the` leg 88 with the screw thereof projecting freely through a hole 81 in the leg 88,

and into screw threaded engagement with the clamping arm 8|. Thus by actuation of` the knurled head 88 the actuating dog may be clamped upon theedge of the mounting disc 18.

It will be* noted that the screw 85 extends past the outer edge' of the mounting disc 18 and this screw might be utilized to limit the inward movement' or positioning of the dog on the mounting disc.

rearwardly projecting lugs 88 formed adjacent opposite edges of and integrally with the leg 88, thereby to provide spaced points of engagement with the periphery of the disc 18. With this construction, the actuating dog resists rocking movement` when it engages the follower 88, even though but a slight clamping force has been applied to the clamping screw 88. Itis sufficient with the present construction merely toapply enough friction between the actuating dog and the disc 18 kto resist relative sliding movement when the associated cam surface engages and actuates the follower 85.

.As herein pointed out the present invention provides for a simple one hand adjustment of "assenso y I V t radially inwardly with respect -to the shaft 11 and is formed byan annular rearward flange at the engages a pair of peripherally spaced lugs |8| formed'at the inner end of the forward leg 88 so as to project forwardly therefrom. The engagement of the lugs vI lll with the surface |88 also acts to resist rocking movement of the dos during its switch-actuating operation.

In order that the lugs |8| may be readily and easily engaged with the annular restraining surface |88, the indicating disc 18 is mounted on the shaft 11 so that it may be Vseparated from the disc 18, as by being rocked to the`positionshown in Fig. 6. In the present embodiment this shiftingm'ovement is readily effected, the indicating.` jdisc 18 being secured in place on the shaft by resilient or yielding means.

Thus a small disc |82 is held in placeA on the shaft 11 by a knurled re-set knob |88, and spring means such as a spring washer |88 (Figs. 5 and 6) isinterposed between 'the disc |82 and the disc 18. A headed pin |81 fixed onA the disc 18 projects rearwardly therefrom through a keyhole slot |88 (Fig. 5) in the disc 18 to assure rotation of the indicating disc in unison with the mounting disc 18 to which the actuating power is applied. Thus it wlll'be apparent that the user may grasp the edge of the indicating disc 18 to tilt the same to the separated position shown in Fig. 6,-thereby to permit conyenient mounting or removal of the actuating A dogs. t

In both the actuating dogs; 88 and 8|, the cam portions 88 are located on the leading ed'ge o f the dog, and are disposed within the angular l segment defined by two radii passingv from the center of the shaft 11 through the remote side edges of the lugs 88. Each dog88 or 8| in the present instance takes up a peripheral portion- L v"segmental portion of the scale 18' though a window |18 adjacent the center of tne forward face of the cover i2, and by the provision of a stationary time indicating marking such as an arrow adjacent to the scale 19'. The arrow is so located that it is in radial alignment with the arrow |88 of an actuating dog at the time whensuch a dog causes shifting of the switch mechanism'.

While the time indicating arrow I|| may be placed on any stationary part of the device', I prefer to place it upon a stationary bracket ||8 which functions additionally in providing a simple and easily operated means for securing the cover l2 in place on the base I. The bracket I8 is suitably secured to thebase and protects vforwardly through openings in the mounting plate clamping screws 88 which project beyond'the The scale 18' also fimctions as indicating (Fig. so as to be readily grasped past the flange IIB in an adjusting in the plane'of the flange IIE. The ear IIT hasy a screw threaded opening |I8 therein for opu erative engagement by the threaded end of a fastening screw IIe which projects through the forward wall 'of the cover I2. The screw IIS has its enlarged knurled head |20 positioned on the outside of the cover I2 and has a collar |2I thereon within the cover so as to hold the screw M8 loosely in place on the cover when the cover is removed from the timer. To facilitate fastening oi the cover, the screw H9 has its end pointed, thereby to simplify engagement of the screw M9 with the threaded opening IIB.

With the switch mechanism illustrated herein, the present timer is particularly adapted for use in transferring dominating control back and forth at selected hours between two diiierently adjusted control devices, such, ior example, as a pair oflroom thermostats E25 and |125 illustrated in the wiring diagram of Fig. 9. The present control may, of course, be used as a simple oir-on control in a governing circuit for a device vsuch as an attic exhaust fan, in which case the switch mechanism I5 is preferably simpliiied so as to eliminate one of the bridging switch assemblies 40.

When the timer of the present invention is used in connection with two control devices such as the thermostats M5 and |26 theconimon terminals @El ci the two thermostats is connected by a wire SI2@ to the terminal 60 of the timer. The other terminal |29 of the thermostat |255 is connected by a wire |30 to the terminal 65 of the time-r, while the other terminal i 3| of the other thermostat |26 is connected by a wire 32 to the terminal G3 of the timer. From the terminals @it and 65, leads |33 and I Si extend in series with a source of line current and to the load such as a burner control means, so that as the switch mechanism I5 is shiftedback and forth, the burner is placed alternately under the control of the two thermostats tEd and |26.

In the ordinary use of the circuit oi Fig. 9, one of the thermostats, as |25, is set to close its contactsat a selected temperature which is to be maintained during the day, while the other thermostat i265 is adjusted for closure at a lower temperature desired during the night, and these differently adjusted controls Vare placed alternately in dominating relation to the circuit i33- i3lt at diiierent hours as determined by the adjustment of the dogs 80 and 8i of the timer. When the switch contacts 50 of the timer ill are bridged, as shown in Fig. 9, the desired night temperature will be maintained by the dominating action of thermostat |26, the circuit being established from the lead |33 to terminal t3, wire |32, terminal ISI, thermostat E25, terminal |21', wire |2d, terminal 60, wire 6|', across the bridged contactsfll, wire 66 to terminal 65 and to lead i3d.

tioning by the timer I0, so as to bridge contacts 50', places the day thermostat |25 in controL,

To simplify the setting of the time switch, and permit the user to readily verify the setting Reversal of the switch posiof the switch mechanism, I providel a manual switch actuator |35 (Fig. 2) which is engageable manually on the exterior of the cover |2. In the form herein shown the actuator |35 comprises a slide member supported and guided on the exterior of the side wall of the cover I2 by a dished guide plate |31, the slide member |36 having spaced lugs |38 projecting inwardly through a slot in the cover so as to be positioned on opposite sides of the arm $4 of the switch supporting member 3|. Thus, by engagement of an outwardly projecting nger-piece ISS on the member i545, the lugs |38 may be engaged selectively with the switch supporting member 3| to shift the switch mechanism to the desired relation. Preferably a pair of expansive coil springs i are located within the guide plate |37 so as to engage opposite ends of the slide member |36, and these springs Idil act to center the lugs i3d so as to avoid interference with the' normal free operation of the switching mechanism by the actuating dogs Sli and 8|.

In satisfying. the wide variety oi conditions or desires on the part of the users, the present timer is of particular advantage since the actuating dogs 8o and di are each capable of adjustment to any position throughout the twenty-four hours of the day. Hence the controlling action of the thermostats i and H26, or other control devices may, in effect, be reversed merely by re-setting of the dogs 3d and 8i. Moreover, the user may readily mount additional actuating dogs 80 and 8l on the mounting disc 'it so as to attain several alternate periods of control by each of the control devices |25 and Sie. The maximum number of such alternate periods, and the minimum length of such. periods, is limited in the present device only by the angular or segmental width of the dogs ttl and di, but it will be apparent that the number of lugs mountable on the disc it could be increased materially by increasing the size oi the disc, or by narrowing the lugs at and di. The relation herein shown, has, however, been found to be satisfactory in most instances, since it requires but a two-hour minimum period between shifting movements oi the switch mechanism.

From the foregoing description it will be apparent that the present invention provides a new and improved time switch device which is so constructed and arranged as to be adaptable for use with a wide variety of control devices and to satisfy a wide variety or control requirements or desires. The timer of the present invention is also such that unusual compactness and simplicity of structure are attained, as for example, in the functioning of but a single time scale as a guide for adjusting the time ci switch actuation and as a time indicator whereby the time may he readily ascertained.

For the normal user, the timer of the present invention is of particular advantage, since a large number oi switch operations-may be olo-V tained during each day, and this .result is attained in a novel and convenient manner such that a useimay readily incorporate or remove the mechanism required to attain such additional switching operations.

What is claimed is:

1. in a time switch mechanism, the combination of a shiftable switch mechanism having at least two positions, a clock mechanism having a rotatable time indicating means providing concentric annular mounting surfaces, an actuating dog mounted on said annular mounting surto hold said dog against outward radial ly and inwardly,

`operable tosecure said dog in adjusted position on said annular surfaces, yand means on said dog and separate from said clamping means for enl surfaces and acting displacement when said clamping means is released..

2. In a time switch mechanism, the combination of a shiftabl'e switch mechanismhavlng at least two positions,v a clock mechanism having a rotatable time indicating means providing concentric annular mounting surfaces, a switchactuating dog mounted on said annular mounting surfaces for movement to various adjusted positions thereabout, clamping means on said dog operable to secure said dog in adjusted position, and means on said clamping means for engaging two oppositely facing ones of said annular surfaces and acting against said oppositely facing surfaces to hold said dog against both inward and outward radial displacement when said clamping means is released. v

3. In a time switch mechanism, the combination of a. shiftable switch mechanism having at least two positions, a clock mechanism having gaging one of said annular a rotatable time indicating means providing con-` centric annular mounting surfaces, two of the surfaces being oppositely faced radially outwardan actuating dog for actuating said switch mechanism mounted on said annular mounting surfaces for movement to various adjusted positions thereabout, clamping means on said dog operable to secure said dog in adjusted position, and means on said dog and separate from said clamping means for Aengaging one o'f said oppositely faced annular surfaces at peripherally spaced points tohold said dos against rocking movement relative to said annular surfaces.

said dog and separate fromv are in tial adjustment on one of vsaid discs and having abutment'means adapted to be engaged with said annular retaining surface when said discs their normal spaced relation `and to be disengaged and released from the retaining action of said annular retaining surface when said discs are relatively moved to said releasing position.

6. An actuating dog withv a clock` comprising, in combination an inner clamping jaw, an outer clamping jaw, a clamping screw for adjustable association operatively connected therebetween and having an enlarged actuating head located on the outer surface of said outer jaw, a supporting portion formed integral with and projecting rearwardly from said outer jaw, means forming a pivoted connection between said supporting portion and` said inner jaw, and a cam member carried by saidsupporting portion.

7. An actuating dogfor adjustable association l with a clock-actuated control device, said dog comprising, in combini' tion an inner clamping jaw,

an outer clamping jaw, a clamping screw opera- 4. In a control mechanism of the character described, a clock actuated rotatable@ member, a pair of discs mounted in concentric relation on said rotatable member for rotation in unisonv therewith and` with their edge portions spaced apart in an axial direction, said discs being mounted in a manner providing for yieldingly resisted relative separation of the two discs from a normal generally parallel relation to increase the normal space between. the edge portions thereof, means on one of said discs forming an anular retaining surface adjacent to its outer edge and facing radially'inwar'dly, and an actu-v ating control element formed with a retaining lug adapted to bev inserted into the space between said discs when said discs are separated beyond their normal spacing and to be held in engagement with and restrained against outward displacement by said'annular retaining surface when said discs are in` their normal spaced relation.

5. In a control device of the character dekvscribed, a clock actuated rotatable member, a

pair of discs mounted in concentric relation on said rotatable member for rotation in unison therewith and in normally spaced relation, said discs being mounted in a manner providing for yieldingly resisted relative movement of the two discs from a normal generally parallel relation to vary the space therebetween to a releasing position, means on one of said discs forming an annular retaining surface adjacent to its outer edge and facing radially inwardly, and an actuating control element mounted for circumferentively connected therebetween and having an enlarged actuating head located on the outer surface lof said outer jaw, a supporting portion formed integral with and projecting rearwardly from said outer jaw, means forming a pivotal connection between said supporting portion and said inner clamping jaw, lug means on said outer jaw having oppositely facing surfaces adapted to engage annular guiding and retaining surfaces on the mounting element of a controlling clock means, and a cammember carried by one of said jaws.

Y 8. In a clock actuated timer, an actuating dog comprising an L-shaped sheet metal member having two legs, a clamping element mounted in opposed relation to a first leg of said L-shaped member, a clamping screw acting between said clamping element and said first leg, an actuating cam surface formed on the second leg, and a plurality of lugs formed on said iirst leg of said L-shaped member and projecting therefrom inV spaced relation to each allel to said second leg.

other in a direction parwith a mounting disc of a clock actuated control device, said actuating dog comprising, in combination'a rear clamping jaw, a forward clamping jaw, 1a clamping screw operatively connected therebetween and having an enlarged actuating head located on the forward surface of said forward jaw, an actuating cam element carried by one of saidjaws, and means for locating said dog in a predetermined position on the edge of said mounting disc, said means comprising a rst pair of lugs formed on opposite edges of said forward jaw and projecting rearwardly therefrom for engagement with the edge of said mounting discat spaced points, and a second pair of lugs formed adjacent opposite edges of said forward jaw and projecting forwardly therefrom for engagement with an annular restraining means to maintain said second pair of lugs in engagement with the edge of said mounting disc.

10. In a time switch mechanism, the combinaytion of, a clock driven shaft, a clock driven memactuated control device, said dog.

said switch lever and adapted to be shifted from said switch lever 21a-sm one of its positions to another, said actuating means comprising a pair oz? actuating riders each located at a different position on said mounting suriace and each including front and rear ciamping jaws engaging opposite sides oi said member, said follower being located the path of movement oi said actuating riders, set screws for reieasabiy clamping the ciamping jaws of each actuating rider to said ciooiz driven member whereby said actuating riders can ne shifted to any desired position, ansi cooperating means separate from said set screws on said ciamping jaws and said member for preventing the removal oi said actuating riders from sai-ci annular member while they are being shifted and for preventing yrocking movement relative to said member w e the actuating riders are clamped in positiono 1i. in a time switch mechanismrthe combination or, a ciocir driven shaft, a clock driven member rotated by said clockdriven shaft, said member providing an annular mounting surface, a pivoted switch lever having a follower arranged adjacent the periphery of said annular mounting surface,- switching mechanism associated with one position to another thereby. and means for actuating said switch lever from one of its positions to another, said actuating means comprising a pair oi actuating riders each located at a different position on said annular mounting surface and each including front and rear clamping jaws engaging the follower being' located in the path oi movement of vsaid actuating riders, set screws for releasably clamping the clamping jaws of each actuating rider to said' member whereby said actuating riders can be shifted to ans1 desired position. cooperating means separate from said set screws on said clamping jaws and said member for preventing the removal of said actuating riders from said member while they are being shifted and for preventing roei-ring movement relative to said member while the actuating riders are clamped in position, andJ oppesiteiy inclined cam surfaces arranged on said actuating riders for engaging and shifting said follower from ene ofvits positions to the other as said driven member is rotated.

opposite sides or said member,v