US2300950A

US2300950A - Timer

Info

Publication number: US2300950A
Application number: US380465A
Authority: US
Inventors: Lux Frederick
Original assignee: LUX CLOCK Manufacturing Co Inc
Current assignee: LUX CLOCK Manufacturing Co Inc; LUX CLOCK MANUFACTURING COMPANY Inc
Priority date: 1941-02-25
Filing date: 1941-02-25
Publication date: 1942-11-03
Anticipated expiration: 1959-11-03

Description

Nov. 3, 1942. ux 2,300,950

' TIMER Filed Feb. 25, 1941 4 Sheets-Sheet 1 K\\\\\ \NI NOV. 3, 1942. UX

TIMER Filed Feb. 25, 1941 4 Sheets-Sheet 2 Nov .3, 1942. F. LUX 2,300,950

TIMER Filed Febl 25, 1941 4 Sheets-Sheet 3 F. LUX

' TIMER- Nov. 3, 1942.

Filed Feb. 25, 1941 4 Sheets-Sheet 4 'tion, as illustrated the clock is designed to be ion to first move the mechanism to "on position .facture.

Patented Nov. 3, 1942 i umrap STATES PATEN orrlc k milufllfllll Company,

Waterbury, Conn, a corporation of Connecti Application February 25, 1941, Serial No. 380,465

j 18 Claims.

This invention relates to timers, and more particularly to a timer which may be employed to control the operation of a switch or some other member which it is desired to move at predetermined intervals, or in a step-by-step movement. As shown, the timer is employed to control the movements of an electric switch to both open and close said-switch, although it will be understood that the particular construction is not limited to this function, but may be employed in various other relations where it is desired to effect the movement of a control member.

The timer illustrated in the present'application is clock-operated, that is, it is combined with a clock mechanism which is designed to indicate the hour as well as to indicate the period during which the switch will occupy an on" position.

, While the particular power employed to operate the clock is not of importance in the applicaoperated'electrically. It will be understood, how ever, that certain of the novel features of the invention may be employed in a timer per se as well as with a combined timer and clock.

In the past devices of this character have been relatively complicated and expensive,and in particular it has been necessary when constructing an on and off timer to employ two' sets of mechanisms which were substantial duplicates of each other, one to operate the movable member to on" position and the other set acting to move the member to oil position. In the present arrangement such duplication of elements is avoided, and one movable controlling member is pro-' vided which is controlledin a step-by-step fashand thereafter to of! position.

One object of the present invention is to provides timer mechanism of relatively simple construction.

A further object of the invention is to provide a timer mechanism in which, the position of a single movable member is controlled by the timer in a step-by-step fashion, the first movement of the member actuating a switch or the like to an on position, and the second movement thereof serving to movethe switch to "oil" position.

A still further object of theinvention is the provision of a combined clock and timer, the iatvtei' being operated by the. clock mechanism, whichwill be of simple construction and which therefore may be relatively economical to manu;

A still further object of theinvention is to provide improved and simplified mechanism to actuate the switch or other controlled member, and which will in turn be actuated bythe clock mechanism, and to provide improved indicating means which may cooperate with the clock face to indicate atonce the period of time during which the switch or other member will be permitted to remain in on position.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig. 1 is a front elevational view of a combined clock and timer embodying my invention; Fig. 2 is a horizontal sectional view on line 2-2 of Fig. l;

' Fig. 3 is a detail view of the switch mechanism; Fig. 4 is a partial vertical sectional view on line 4-4 of Fig. 1;

Fig. 5 is a sectional view on line 5-.--5 of Fig. 4

Fig. 6 isasectional view on line 8-6 of Fig. 5;

Fig. 7 is a sectional view on line 1-1 of Fig. 6;

Fig. 8 is a detail view of the movable controlling member;

Fig. .9 is a detail sectional view on'lineO-S of Fig. 8;

Fig. 10 is a detail view of the switch-operating mechanism;

Figs. 11 and 12 are views similar to Fig. 10, showing different positions of this mechanism;

Fig. 13 is a front elevational view of the "03 indicating disk;

Fig. 14 is a similar view of the "on indicating disk;

Fig. 15 is a detail view oi the face of the clock showing the on and 011" disks'in inoperative position; and

Fig. 16 is a viewsimilar to Fig. 15 showing the indicating disks when they have been set for a predetermined operation.

To illustrate a preferred embodiment of my invention, I have shown a clock mechanism comprising a case "I having a dial II and the usual minute and hour hands I! and I3. The clock is adapted to be operated through reduction gearing designated generally by the numeral l4, which in the present instance is designed to be powered by the motor ll, which may be either a spring or electric motor, preferably the latter.

As the foregoing mechanism may be of conven- A tional character, it is unnecessary to describe the sameindetail. It will sumce to say'that the ,7 clock mechanismls 'supportedupon spaced plates A and? in a usual manner, and that the motor through the reduction gearing l4 serves to rotate the shaft I! (Fig. 4). upon which the minute notch or recess 3|.

hand I2 is mounted. Secured to this shaft is a pinion I! in mesh with agear |8, which gear is in turn secured to a relatively wide pinion 8. The teeth of the pinion l8 are in turn in mesh with those of a gear 28 rigidly mounted upon a sleeve 2| surrounding the shaft I8, which sleeve carries the hour hand l3.

Surrounding the sleeve 2| is a sleeve 22, which sleeve passesthrough the dial ll of the clock face and carries rigidly on its outer end the on setting disk 23. Also secured to the rear end of the sleeve 22 is a pinion 24 through which, as will be hereinafter described, the disk 23 may be set to a given position.

Secured to the sleeve 22 so as to rotate therewith is a control disk 25 having a peripheral notch or recess 28 at one point therein, the purpose of which will be hereinafter described.

Surrounding the sleeve 22 is a further sleeve 21 which projects through the clock dial and carries upon its outer end the off setting disk 28, the sleeve 21 also carrying a setting pinion 28 and a control disk 38 having a peripheral The

disks

25 and 38 are substantially alike in construction, and may be spaced apart by a washer 32. The

setting disks

23 and 28, together with the sleeves upon which they are mounted, are frictionally held in any position to which they may be turned by means of a spring ,washer 33 between the clock dial and the disk 28, and a second spring washer 34 between the face of the sleeve 21 and the disk 23. In practice the friction exerted by the washer 33 is greater than that exerted by the washer 34, so that when the disk 23 is turned or set the position of the disk 28 will not be disturbed.

As shown in- Fig. 13, the disk 28 may have a portion thereof colored to contrast with the remainder, and with the color of the disk 23. As shown, substantially one half of the disk is colored red, as at 35, and may have spaced indicating marks 38 corresponding with those of a portion of a usual clock dial. That is, if one half of the disk 28 is colored red, this portion will be marked oil into six hour spaces, each hour space being subdivided if desired. This disk is also provided 'with a pointer 31 which will cooperate with the numerals on the clock dial toindicate the time at which the switch or other member may be actuated to off position. As shown in,

Fig. 14, the disk 23 may be of substantially semicircular form and provided with a pointer 38 to cooperate with the indicia on the clock dial. to indicate the time of moving the switch to on position. As will be seen from Fig. 15, for example, the

pointers

31 and 38 may be set in registration, at which time the colored portion 35 of the disk 28 will be completely covered by the disk 23, and at this time the recesses or

notches

26 and 3| will be in registration. shown in Fig. 16, the disks may be rotated to any desired position, for instance, to turn the switch on at two oclock and to turn it oil at five-thirty oclock. In this position of the members, a part of the colored portion of the disk 28 will be exposed to view, and this colored portion will extend over that portion of the dial oi the clock during which period the switch will occupy the on position. That is, the operator, by bserving the face of the clock, will be immediately informed as to the period during which the switch will be on, by the extent of the colored portion of the dial 28 which is exposed.

Referring to .Fig. 2, a setting shaft 48 is movement, this shaft having a turn button 4| on the outer end thereof, and being spring pressed toward its outer position, shown in Fig. 2, by a spring 42 bearing against the end of the shaft behind the plate B. Upon the shaft 48 are a pair of pinions 43 and 44. In the outer position of the shaft the pinion 43 is designed to engage a gear 45 which is at all times in mesh with the pinion 28 of the off setting disk 28, so that in this position of the parts rotation of the button 4| will turn this disk to any desired position.

When the shaft 4| is pressed inwardly by pres 'sure upon the button 4| against the action of As further mounted in theplates A and B for longitudinal the spring 42, the pinion 44 engages a gear 46, which gear is in mesh with the pinion 24 on the sleeve 22 of the on setting disk 23, so that this disk may likewise be turned to any given position. It will be understood that the spacing of the pinions 43 and 44 is less than that oi'the gears 45 and 48, so that when the pinion 43 is engaged with its gear 45, the pinion 44 will be disengaged from the gear 48, and vice versa, thus permitting the setting of one disk independently of the other. It may also be stated that as the notched

disks

25 and 38 rotate with the setting

disks

23 and 28, the

notches

28 and 3| will always hear a position related to that of the

pointers

31 and 38.

Slidably and rotatably mounted upon the sleeve 22 is a hub 58 to one end of which is secured a gear 5|, the teeth of which are in mesh with the pinion |9, so that this hub will in the present instance be rotated at a speed corresponding to that of the hour hand of the clock, the gear 5| being of the same size as the gear 28. This hub and associated parts constitute the controlling or actuating member of the timer which serves to cause the actuation of the switch or other member to on and off positions. Secured at the end of this hub opposite the gear 5| is a disk 52 through and from which projects a spring arm 53 secured to the hub, this arm having a bent end 54. It may be noted that the arm 53 clears the outer peripheral edges of the

disks

25 and 38, so that the hub 58 may rotate in the position of the parts shown in Fig. 4 without interference from the disks. However, the bent end 54 turns inwardly to a suflicient extent so that when this end is in registration with the

recesses

26 and 3|, it will pass therethrough, the width of the spring arm 53 being slightly less than that of the notches in the disks. It will be also apparent, as the description proceeds, that it is necessary to move the hub 58 to the left, as shown in Fig. 4, even when the

notches

26 and 3| are not in registration with the arm 53. This can be readily accomplished as the resilience of the arm 53 is such that it will spring upwardly so that the bent end 54 will ride over the outer periphery of the disks when the hub 58 is thus moved.

An'actuating yoke 68 provided with a laterally extending portion 6| is pivotally carried by the plate B, as shown in Figs. 4, 5 and 7. The end of the member BI is substantially T-shaped in form, and projects through a slot 62 in the plate so as to be held in position by a swinging arm 63 having a notch 64 to engage the reduced portion of the member 6| behind the plate. This yoke member is provided with

arms

65 and 88 which lie between the gear 5| and disk 52, so that the yoke will be swung about its pivot in the plate B when the hub 58 is moved axially, and vice versa, the hub, however, being rotatable freely between the arms and 88. This yoke to rotate the shaft in .a counterclockwise direction, as will be hereinafter explained. The upper sleeve 22.

upon the shaft 18.

member is spring pressed outwardly at its lower end, as shown in Figs. 4 and 6, by means of the tension spring 81 secured to the member below the pivot, and secured at its upper endat 88 'to e the plate B so that the lower end of the yoke and 5 the hub 58 will-be urged toward the right or toward the position in which it is .shown in Fig. 4.

This yoke 88 serves to control in a step-bystep movement the rotation of a shaft 18 rotatably. and slidably mounted in the plates A and B, as shown more especially in Figs. '4, 5 and 6. Secured to this shaft is a-hub 1| upon which is mounted an arm 12 to which is secured one end of a spring 13, the other end being secured to a post 14 on the plate B, so that this spring tends tion. A spring 15, acting between a portion of the hub and the plate B, serves to normally urge the shaft 18 outwardly or to the right, as shown in, Fig. 4. Also secured to the hub 1| are a plurality of

stop arms

16, 11 and 18, in addition to a detent 18 arranged on one end of the hub itself.

Secured to the plate A is a stop member 88 having a reduced end 8|, the latter of which isadapted to be engaged by the edge 82 of the arm 18, while the larger portion 88 of the stop member is adapted to be engaged-by the detent 18 to hold the member 18 in predetermined posiend of the'yoke member 88 is provided with an arm 83, which is adapted to engage the

arms

18 and 11, and-thus control rotation of the shaft 18 in a step-by-step movement, according to the position of the yoke 88, which is in turn controlled by the axial position of the hub 58 on the Thisposition of the hub will be in turn controlled by the cooperation of the arm 53 and the

disks

25 and 38, as will be hereinafter explained. a 40 While the particularswitch mechanism is not important in allaspects of the invention, I have shown in Fig. 3- a switch comprising fixed contacts 85 and'86 adapted to be engaged by

movable spring contacts

81 and 88, respectively, the

spring members

81 and 88 being so tempered as to be normally urged toward each other or away from the

contacts

85 and 88 when not pressed outwardly by a non-circular member 88 mounted It will be understood that when the member 88 islturned so that its parallel sides are toward the

members

81 and 88, these members will be disengaged from the fixed

contacts

85 and 88, and the switch will be open. When, however, the vertices of the member 88 engage the

members

81 and 88, as shown in Fig. 3, the

members

81 and 88 will'be forced out-' wardly and the switch will be in on" position. As shown, a movementof the shaft '18 through an angle of 45 moves the switch from fofl' to so on" position, and vice versa. Upon the shaft 18 is provided a manipulating button 84 by which the shaft may be rotated and also moved longitudinally.

Any suitable means may be employed to secure the arm 53 to the hub 58. In the present instance, however, I provide the hub with a peripheral groove or recess 88, and an axial recess 8|. The arm 53 is of T-shaped formation, having a head 82 disposed within therecess 88, while the body of the arm lies in the recess 81. The head is held in place by means of a split spring ring 83 which maybe snapped into the recess over the head of the arm.

It is desirable in devices of this character to be able to set the timer either for automatic or manual control, the latter being employed when,

it is desired to control the current passing through the switch by means other than the timing mechanism. This is provided in the present instance by longitudinal movement of the shaft 18. When this shaft is moved inwardly, or to the left, as shown in Fig. 4, the surface 82 of the arm 18 engagesthe reduced portion 8|- of the stop, as shown in Fig. 5. In this position the

switch arms

81 and 88 are thrown outwardly,

as shown in Fig. 3, so as to close the contact points and permit the current to flow so that the flow may be manually controlled by other means.

.This position of the shaft 18 shown in Fig. 5 is the extreme counterclockwise position of the shaft. When it is rotated through approximately 45 in a clockwise direction from the position shown in Fig. 5, the shoulder 18 will catch upon the enlarged portion 88 of the stop, the shaft being moved to the right (F i g. 4) by the spring 15, and the shaft 18 will be held in this position, opening the switch and thus arranging the device for automatic control. It will be noted that the arm 16 is provided with a portion 18 offset axially of the shaft 18 with reference to the member 11,

and also that the arm 18 is provided with a cam edge or surface 18 for a purpose which will now be described.

The position of the parts shown in Figs. 4 and 5, for example, may be considered a normal position thereof, which is the position in which the device stands when arranged for manual con-- with the gear 48 to rotate the on setting disk 23 until the pointer 38 indicates the time at which it is desired that the currentbe turned on. For example, in Fig. l of the drawings izhe' device isset for the current to be turned on at four oclock and of! at six, while in Fig. 16 the setting is such that .the current will be turned on at two oclock and oil at five-thirty. In either case the period about the clock dial during which the current will flow will be indicated precisely by the colored portion of the disk 28 which is exposed, so that the operator is readily aware 'of any error which might have been made in the setting, and this portion of the disk also bears indicia which shows the lengthof time during which the current will be on. This setting of the

disks

23 and 28 will likewis'erotate the

disks

25 and 38, so that the notches or recesses 28and 3| will be rotated to a position relating to the pointers 31 and 38', which position in the present construction is a position directly opposite these pointers respectively.

After the pointers have been set the 5. During'this rotation the

arms

18 and 11 pass pivotal support in the plate B. This moves the lower end of the yoke, and therefore the hub 58,

to the left from the position shown in Fig. 4. It

will be understood that the disks 25- and 38'have been moved so that the notches 28 and 8| are no longer opposite the end 54 of the arm 53.

. knob 88 is rotated in a clockwise direction in Figs. 1 and This, however, will not prevent the movement of the hub 50 to the left, as the arm 53 is resilient and will merely spring upwardly, permitting the end 54 to ride upwardly over the edges of the disks. When the hub 50 has been moved sum- 54 of the arm 53 to clear the disk 25, it will snap downwardly until its outer end engages the inner face of this disk, and thus prevent the hub 50 and lower end of the yoke 60 being moved to the right under the tension of spring 51. The operator then releases the button 84 and the spring II will turn the shaft in a counterclockwise direction until the edge ll of the arm 11 strikes against the portion 53 of the yoke. This is the position of the parts shown in Fig. 11, and the mechanism is now set for its next operation, which will be to turn the current on at the proper time, for in the position of the parts just described the member 89 is in a position at an angle of 45 from that shown in Fig. 3, and the contact members are not in engagement.

As has been explained, the hub 50 is rotated by the clock mechanism in synchronization with the hour hand of the clock, and carries with it the arm 53. When, therefore, the clock has run to the point where the end 54 of'this arm registers with the notch 26, it will move through this notch under force of the spring 61, thus permitting the hub 50 to move toward the right, as shown in Fig. 4. This movement of the hub and lower end of the yoke toward theright will move the upper end of the yoke toward the left, so that the arm 83 will be disengaged from the edge 11' of the arm 11, and permit the shaft III to be rotated through an angle of approximately 45 until the edge of the portion 16" of the arm 15 is engaged by the arm 83, as shown in Fig. 12. The offsetting of the portion Hi permits this result, as, while the arm 83 is moved suiilciently far to the left (Figs. 11 and 12) to disengage the arm 11, it will still be engaged by the offset portion 16' of the arm 16. This movement of the shaft 10 results in setting the cam member 89 in the position shown in Fig. 3, and making the contact to turn the current on.

When the clock mechanism, which cont nues to run, has progressed to the point at which the end 54 of the arm 53 registers with the notch 3!, the

arm will pass through this notch, thus allowing the hub 50 to be moved another step to the right, or to its extreme right-hand position, as shown in Fig. 4, by the spring 51. This will serve to move the arm 83 another step to the left from the position shown in Fig. 12, until the portion 15* of the arm 15 is released from engagement with the part 83. This permits a further rotation in a counterclockwise direction of the shaft Ill under impulse of the spring 13, until the surface I! engages the enlarged portion 80 of the stop member, and serves to turn the current off, which completes the cycle of operation.

If it is now desired to close the switch so that the device controlled by the switch may be operated manually, the button 54 is pushed inwardly, which releases the portion 19 from the enciently far to the left, as it will be, for the end '53 under spring pressure, the

disks

25 and 30 may be set to any position, and the hub 50 moved away from these disks by reason of the fact that the arm 53 may spring upwardly to permit the end 54 to ride over these disks, so that the mechlarged portion 80 ofthe stop, and results in the engagement of the surface 82 by the reduced part- II of the stop, which permits a further turn of the shaft 10 to close the switch, as shown in Fig.

3. It will be seen that, whereas usually two con- I have provided a single controlling or actuating anism may be set for operation regardless of the position of the disks. Moreover, when the first or "on disk 25 permits the end 54 of the arm to pass through the notch 25, the end of this arm will then engage the adjacent face of the second disk 30, and prevent further movement of the hub 50 until the arm comes into registration with the notch 3|.

While I have shown and described a preferred embodiment of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the appended claims.

What I claim is: i

1. In a timer, a pair of rotatable disks each having a peripheral slot therein, means for manually rotating said disks to set each in a predetermined position, a power operated rotatable element, an arm carried by said element projecting toward said disks, means on the end of said arm adapted to enter said slots when in registration therewith and said means being yieldable outwardly to ride over the edges of said disks in one direction when the said means is not in registration with said slots, means mounting said element for axial movement, means urging said element axially toward said disks, and a controlling member actuated by the axial movements of said element.

2. In a timer, a power operated rotatable element, said element also being axially movable, means to effect successive axial movements of said member comprising a pair of discs, said element having a part normally abutting said disks but being freed therefrom by rotation of said element, and a movable controlling member, the movement of which is controlled by the axial movements of said element.

3. In a timer, a power operated rotatable element, said element also being axially movable, means to effect successive axial movements of said member comprising a pair of disks, said element having a part normally abutting said disks but being freed therefrom by rotation of said element, and a controlling member the movement of which is controlled by the axial movements of said element, said part comprising a spring pressed member projecting toward the disks and the latter each having a slot therein to receive said member when registering therewith.

4. In a timer, 9. power operated rotatable element, said element also being axially movable, means to effect successive axial movements of said element comprising a pair of disks, said element having-a part normally abutting said disks but being freed therefrom by rotation of said element, and a movable controlling member the movement of which iscontrolled by the axial movements of said element, said part compris ing a spring pressed member projecting toward the disks, and the latter each having a slot therein to receive said member when registering there- 5. In a timer, a power operated rotatable element, said element also being axially movable, means toeffect successive axial movementsof \said m mber comprising a pairof discs, said element aving a part normally abutting said'disks but being freed therefrom by rotation of said element and a movable controlling member, the movement of which is controlled by the axial movements of said element, said controlling member comprising a rotatable shaft, and means connecting said element-to said shaft to effect a step by step movement of the latter..

6. In a timer, a power operated rotatable element, said element also being axially movable, means to effect successive axial movements of said member comprising a pair of disks, said element having a part normally abutting said disks but being freed therefrom by rotation of said element, a lever actuated-by the said element, a control member comprising a rotatable shaft having a plurality of spaced arms and said lever having a part normally lying in the path a step by step movement, comprising a shaft,

an actuating element rotatably and slidably mounted on said shaft, means for rotating said element, means operatively connecting said element to the control member to control movement of the latter, and means for effecting step by step movement. of said actuating element along said shaft comprising settable means roof said arms but moved therefrom by axial movement of said element.

7. In a timer, a power operated rotatable element, saidelement alsobeing axially'movable, means to effect successive axial movements of said member comprising a pair of disks, said element having a spring pressed part normally abutting said disks but before being freed therefrom by rotation of said element and a movable controlling member, the movement of which is controlled by axial movement of said element.

8. In a timer,'a power operated rotatable element, said element also being axially movable.

means to effect successive axial movements of said member comprising a pair of disks, said element having apart adapted to be engaged and released successively by said disks to permit axial movement of said element and a movable controlling member, the movement of which is controlled by axial movement of said element.

9. Means for operating a control member in a step by step movement, comprising a shaft.

an actuating element rotatabl'y and slidably mounted on the said shaft, means for' rotating said element, means operatively connecting said tatable with respect to said shaftyand a part on said element adapted to be engaged and released by said settable means.

10. Means for operating a control member in element to the control member to control movea stepby step movement, compris ing ashaft,

an actuating element rotatably andslidably mounted -on the said shaft, means for, rotating sa'd element, means operatlvely connecting said' element to the control member to control movement of the latter, and means for effecting step by step movement of said actuatingelement along said shaft comprising settable means rotatable with respect to said. shaft, and 'a part on said element adapted to be engaged and re-.

. an actuating element rotatably and slidably mounted on the said shaft, means for rotating said element, means operatively connecting said element to the controlmember to control move ment of the latter, and means for effecting step by step movement of said actuating element along said shaft comprising settable means rotatable with respect to said shaft, anda part on said element adapted to be engaged and released by said settablemeans, said settable means comprising a disc-having a peripheral opening therein, said part comprising aspring arm the body portion of which lies beyond the edge of portion to engage the disk except when aegistering with said'opening.

13. A timing mechanism having a power control element movable to two separate positions,

a pair of superposed indicating members, said 1 members being normally stationary during the operation of the. timing mechanism but rotatably movableindependently to setting posi-- tion's, means cooperatinggwith' said members for moving said control plenient at times predetermined by the setting of said members, one of said members having an indicating means thereon to designate ,the time of movement of .said

element to power-on position, the other of said members having I indicating means thereon to designate the time of movement of said ele-- element to power-oi position, the inner of said members being in the form of a d-isk, and the outer of saidymembershaving a portion thereof cut away to expose a sector-shaped portion of said disk, the indicating means onthe outer member being atone lateral edge of tl'i'e.cut--v away portion thereof whereby. the area of the inner member exposed between said two indieating means indicates the time elapsing between said movements.

14. A timing mechanism having a power control element movable to two separate positions, a pair of superposed indicating. members, said members being normally stationary during the.

operation of the-timing mechanism but rotat-- ably movable independently to setting positions, means cooperating withsaid members for moving said control element at times predetermined I by the setting of said members, one'of said memleasedby said. settable means, said control members having an indicatingmeans thereon to designate the time of movement of said element to power-on position, the other of said members having indicating means thereon to designate the time of -movement of said element to poweroff position, the inner of'said membersbeing in the-form of a disk, and the oirter of said members having a portion thereof cut away to expose a sector-shaped portion of said disk, the

end i one lateral edge of the cut-away portion thereof whereby the area oi the inner member exposed between said two indicating means indicates the time elapsing between said movement, a portion of said inner member adjacent the indicating means being colored to contrast with the remainder, and a part 01' said colored portion being exposed between the indicating means on the respective members when they are rotatably displaced.

15. A timing mechanism having a power control element movable to two separate positions, a pair of superposed indicating members, said memberslbeing normally stationary during the operation 01 the timing mechanism but rotatably movable independently to setting positions, means cooperating with said members for moving said control element at times predetermined by the setting of said members, one 01 said members having an indicating means thereon to designate the time 01 movement of said element to power-on position, the other of said members having indicating means thereon to designate the time of movement of said element to power-oft position, the inner of said members being in the form of a disk, and the outer of said members being of the form of a sector to expose a sector-shaped portion of said disk, the indicat. ing means on the outer member being at one lateral edge thereof whereby the area of the inner g 2,300,950 indicating means on the outer member being at ably movable independently to setting positions, means cooperating with said members for moving said control element at times predetermined by the setting 01' said members, one of said members having an indicating means thereon to designate the time of movement of said element to power-on position, the other 0! said members having indicating means thereon .to designate the time of movement of said element to powerofi. position, the inner of said members being in the form of a disk, and the outer of said members being of the form oi! a sector to expose a sector-shaped portion of said disk, the indicating means on the outer member being at one lateral edge thereof whereby the area of the inner member exposed between said two indi- I cating means indicates the time elapsing bemember exposed between said two indicating means indicates the time elapsing between said movements.

16. A timing mechanism having a power control element movable to two separate positions, a pair of superposed indicating members, said members being normally stationary during the operation of the timing mechanism but rotattween said movements, and a portion of the area of said inner member adjacent the indicating means thereon being colored to contrast with the remainder whereby the portion exposed between said two indicating means will be readily discernible.

17. A timing mechanism according to claim 13, wherein the mechanism is provided with a clock face having a dial with time indications thereon, and the indicating means provided on said members cooperate with said time indications on said dial to indicate the times of said movements.

18. A timing mechanism according to claim 14, wherein said mechanism is provided with a clock face having a dial with time indications thereon, and said exposed colored portion oi the inner member cooperates with the time indications on said dial to indicate thereon the time elapsing between said movements.

FREDERICK LUX.