US2485195A - Timing mechanism - Google Patents

Description

Oct. 18, 1949. w. P. GALLAGHER El AL TIMING MECHANISM Filed April 1, 1946 9 Sheets-Sheet 2 A44 OFF 64 car may H TC .wf/ w w H s w 3 F mm ma an m I 6e): Y Carl Z feber,

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44147204 OFF SWITCH 0N v 0a. 18, 1949. I I w. P. GALLAGHER HAL 2 ,485,195

TIMING MECHANISM Filed April 1, 1946 1 9 Sheets-Sheeb 4 Jnvehiors; I 196a zza en' Ct /rd Zz/eer, PM 5". 52/150 7" w. P. GALLAGHER ET AL ,485,195

Oct. 18, 1949.

TIMING MECHANISM 9 Sheets-Sheet 5 Filed April 1, 1946 Carl Zz/eber,

O 8, 1949. w. P'. GALLAGHER ET AL 2,485,195

TIMING MECHANISM Filed April 1, 1946 9 Sheets-Sheet 6 Wu a z 5 a w a 7 l w 7 7 i Wu J 9 6 9 w I w w r, 8 d y l 9 w J a wmr 6 w 7?, MESz/iwr. W l

William] G a/r6 Zube w. P. GALLAGHER ET AL 2,485,195

TIMING MECHANISM 9 Sheets-Sheet 9 Filed April 1, 1946 I Jnverzzors; William? Patented Oct. 18, 1949 UNITED STATES PATENT OFFICE TIMING MECHANISM of Illinois Application April 1, 1946, Serial No. 658,680

15 Claims.

This invention relates generally to timing mechanisms and it has particular relation to presettable timing mechanisms for effecting the operation of an alarm and a switch or either of them at a predetermined time.

It is usual to provide a clock in which the hour hand makes one revolution in twelve hours and to provide an alarm mechanism and a switch or both which can be set to operate at any time within the twelve hours. It is often desirable to have the alarm and/or switch to be operated at some time in the second twelve hours rather than in the first twelve hours. That is, it may be desirable to arrange for operation at, say, seven oclock in the evening, the settin being made within twelve hours after this time in the preceding evening.

Such operation is desired where an electrical appliance, such as a coffee maker or a radio set, is to be turned on and an alarm given at a time more than twelve hours after the setting is made. Also, it might be desirable to turn on a light or lights at a predetermined time more than twelve hours after the setting is made. Such operation may be required for illuminating a sign a store window or like application.

Accordingly the object of this invention generally stated is to provide a combination alarm and time switch which may be preset to operate at any time within a second twelve hour period after the expiration of a first twelve hour period which shall be simple, efficient and accurate in operation and which may be readily and economically manufactured and used.

Another object is to provide for operating mechanism such as an alarm and switch mechanism or either of them at a predetermined time more than twelve hours after a given time using timing mechanism which operates through one cycle in twelve hours.

A further object is to provide for manually selecting the operation and either the first or the second twelve hour interval.

A still further object is to shift an operating member from one positon to another in the first twelve hour interval and to shift it to a third position in the next twelve hour interval to effect the desired Operation at that time.

Another object is to provide for shutting off the alarm mechanism without changing the position of the switch.

Other objects of this invention will in part be obvious and in part appear hereinafter. I

This invention is disclosed in'the embodiment thereof shown in the accompanying drawings and it comprises the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth and the scope of the application of which will be indicated in the appended claims.

In general the invention comprises a timing motor, such as a synchronous motor, which is arranged to drive a time wheel through one revolution in twelve hours. Conventional hour and minute hands are provided for cooperation with the time wheel andto indicate with respect to a dial in a conventional manner the time. A manually presettable, adjustable dial is arranged to carry a trip pin the positon of which controls the functioning of the tripping mechanism.

A spring biased multiple stop plate is arranged to be locked manually in an inoperative position and to be moved manually to various operative positions as well as to be moved automatically to these operative positions after it has been unlocked from its inoperative positon. Assuming that the mechanism is to operate at a time in the second twelve hour period, the adjustable dial is set to the desired time and the trip pin carried thereby cooperates with the trip mechanism on the time wheel during its next revolution for releasing the multiple stop lever to move from one position to another. However, at that time no further operation takes place in so far as the alarm and switch mechanism is concerned.

When the time wheel completes a second revolution and the tripping mechanism carried thereby engages the trip pin, the multiple stop plate is released to move to a position where the alarm isreleased and the switch is operated.

The multiple stop plate then can be moved manually so as to shut off the alarm while maintaining the switch in the operated position.

Additional manually operable means is provided for cutting out or shutting off the alarm mechanism. Such operation may be desirable where only the switch operation is required.

It will be understood that, while the present invention is described in connection with a switch mechanism that is arranged to be operated from the open to the closed position at the presettable time, the arrangement may be such that the switch is operated from a closed to an open position. Moreover, while a synchronous electric motor is disclosed as providing the driving means for the timing mechanism, it will be understood that other types of motor including a spring motor can be used.

For a more complete understanding of the nature and scope of this invention reference may be had to the following detailed description taken in connection with the accompanying drawings in which:

Figure 1 is a View, in front elevation, of a clock in which the present invention is incorporated;

Figure 2 is a view, in rear elevation, of the clock shown in Figure 1;

Figure 3 is a view, in side elevation, of the clock shown in Figure 1;

Figures 3a-3e show different positions of the control lever;

Figure 4 is a view, in rear elevation-of the clock mechanism with the back plate removed;

Figure 5 is a detail sectional view takenalong the line 5-5 of Figure 4;

Figure 6 is a view, in front elevation, of the mechanism mounted on the back plate, the case having been removed;

Figure '7 is a view, in front elevation, of the mechanism shown in Figure 6 with the adjustable dial removed and showing the trip mechanism mounted on the time wheel;

Figure 8 is a detail sectional view taken along the line 3-8 of Figure 7 and illustrating the mechanism in the case;

Figure 9 is a detail sectional view taken along the line 98 of Figure i;

Figure 10 is a detail sectional view of one of the adjusting nobs;

Figure 11 is a view, in end elevation, at an enlarged scale of the adjusting nob;

Figure 12 is a view, in front elevation, of the switch mechanism, terminals and insulating mounting block;

Figure 13 is a detail sectional View taken along the line |3|3 of Figure 12;

Figure 14 is a view, in front elevation, of the base plate and certain of the mechanism mounted thereon with the control lever in the position 1;

shown in Figure 3d;

Figures 15 and 16 are detail sectional views taken along the line |5|5 of Figure 14 showing how the control lever is released to permit movement from one position to another;

Figure 17 is a view, in front elevation, of the base plate and certain of the mechanism mounted thereon with the control lever in the position shown in Figure 30;

Figure 18 is a view similar to that shown in Figure 14 but with the control lever in the position shown in Figure 3a;

Figure 19 is a View similar to that shown in Figure 17 but with the control lever in the position shown in Figure 3b; and

Figure 20 is a view similar to that shown in Figure 14 but with the control lever in the position shown in Figure 36.

Referring now particularly to Figures 1 through 4 of the drawings, it will be noted that the reference character 2| designates a clock case which may be of metal or plastic. The case 2| carries a numbered face plate or dial 22 with which a minute hand 23, mounted on a shaft24, and an hour hand 25 cooperate to indicate the time in a twelve hour period. Attention is called to the graduations indicated at 26 along the inner rim of the dial 22 which are divided into quarter hour intervals.

An adjustable dial 2! is arranged to be rotated manually, as will be set forth hereinafter, for presetting the mechanism to operate at the desired time. The dial 21 carries an index 28 which can be set to the desired time with respect to the scale 26 and the dial 22.

- hereinafter.

The face of the clock is provided with a cover glass 29 which may be held in place by a retaining ring 30. As shown more clearly in Figure 9 the retaining ring 30 may be provided with integrally formed tabs 3| which project into apertures 32 in the case 2| and are bent over inside thereof for holding the ring 3|| and therewith the cover glass 29 in place.

At one side of the clock case 2| a control lever 33 projects. The control lever 33 has various positions as indicated in Figures 3a-3e to which detailed-reference will be made hereinafter. Suitable conductors 34 extend from the clock case 2| for energizing the synchronous electric motor incorporated therein. It will be understood that the conductors'34 may be connected to a suitable source of alternating current such as a cycle-1'10 volt source.

In Figure 2 it will be noted that the clock is provided with a back plate 38, which may be formed of metal and that it has an inwardly and upwardly extending flange 39 that projects into a slot 40, Figure 9, for holding the upper side in place. The major portions of thesides and top of the back plate 39 are turned inwardly as indicated at 4| to stiffen it and to provide a closer fit with the inner wall of the case 2|. Screws 42, Figure 2, serve to hold the bottom of the back plate 38 in the case'2| and permit ready removal thereof.

The back plate 38 has an inwardly deformed section 43 which is apertured at 43 for receiving a socket portion 44 of an insulating housing which carries the switch that will be described Slots '45 are provided in the portion 44 of the housing that are spaced apart so as to receive a conventional plug attached to conductors that are connected to the electrical device which is to be controlled. For example, the conductors connected to the plug may be connected to a radio set, electrical appliance, lamp or the like which is to be energized or de-energized at the time the switch operates. It will be understood that the energy for operating the device may be obtained through the conductors 34.

The inwardly deformed section 43 of the back plate 38 may be provided with a generally semicircular opening 46 through which a raised section 41 of the insulating housing may project.

The section 41 has an aperture 48 therein through which the conductors 34 extend into the switch housing for connection to terminals therein, as will be described hereinafter.

An adjusting knob 5| is mounted on the rear end of the shaft 24 and serves to permit manual setting of the minute hand 23 and hour hand 25 in conventional manner. As shown in Figures 10 and 11 the'knob 5| has a barrel 52 integrally formed therewith for slipping over the rear end of the shaft 24 with a relatively close fit. The shaft 24 is longitudinally slotted as indicated at 53 to facilitate application of the barrel 52 and to provide a certain degree of resiliency for holding the knob 5| thereon. One side of the slotted shaft 24, as indicated at 54, is longer than the other side for projecting through a semi-circular aperture 55. This construction permits the knob 5| to rotate the shaft 24 on the application of torque thereto. At the same time it permits ready assembly of the knob 5| on the shaft 24. If desired, after assembly the semi-circular end 54 of the shaft 24 may be peened over to prevent ready removal of the knob 5|.

A control set knob similar to the nob 5|, is mounted in a like manner on the rear end of a shaft 56 which, as will hereinafter appear, carries a dial gear for adjusting the position of the dial 21.

The back plate 38 is apertured as indicated at 51 for receiving an alarm cut-out slide 58. The slide 58 is shown more clearly in Figure 5 Where it is illustrated in the alarm release position.

A mounting screw 59 extends through the back plate 38 and is secured in place by a nut 59'. As shown in Figure 5 the mounting screw 59 serves to hold a bell 68 in place on the inner side of the back plate 38. As is shown more clearly in Figure 8 the central rear part of the bell 68 is deformed outwardly as indicated at SI for receiving the mounting screw 59 and providing a limited area of engagement with the back plate 38. The engagement of the section 6| with the back plate 38 is the sole support contact with the bell 68 thereby improving its tone.

As indicated in Figure 3 one side of the case 2I is provided with a generally rectangularly shaped opening 62 through which the control lever 33 projects. An indicator plate 63 is carried by and is movable with the control lever 33. As shown, the indicator plate 63 carries numbers such as 12 and 24 which register with a side aperture 64 to indicate the position occupied by the a control lever 33. When the figures 12 are visible, the clock is set to operate the alarm and/or switch at the preset time within the next 12 hours. When the figures 24 appear in the open-- ing 64, the alarm and/or switch will be operated at a preset time in the second 12 hour period.

As shown in Figure 4, when the back plate 38 is removed, a base plate 68, preferably formed of metal, is visible. The base plate 68 is provided with a nose 69 which, as illustrated in Figure 9,

is arranged to fit in a slot 18 in the under side of the top of the case 2|. Screws 1I serve to hold the base plate 68 in position in the case 2| and on removal thereof permit withdrawal of the base plate 68 and the mechanism mounted there- It will be observed that the base plate 68 is slotted as indicated at 12 with the edges of the intermediate section 13 turned upwardly for receiving conductors 14. This construction is provided to insure that the conductors 14 do not touch the bell 68, the rim of which extends over the section 13, thereby impairing its tone.

The conductors 14 serve to energize a synchronous electric motor 15 which may be of conventional construction in so far as the present invention is concerned. The motor 15 is held in position on the base plate 68 by screws 16.

The motor 15 is arranged to drive a gear Wheel 11 through a suitable reduction gear train (not shown) at a speed of one revolution per hour. The gear wheel 11 is carried by a shaft 18 which projects through the base plate 68 and carries at its forward end a pinion which will be referred to hereinafter. The gear wheel 11 drives a gear wheel 19 that is fast on the shaft 24 which, it will be recalled, carries the minute hand 23.

On the lower left hand corner of the base plate 68 is mounted an insulating switch mounting block or housing 88 from which the projections 44 and 41, previously referred to, extend and with which they are integrally formed. The housing 88 is formed of suitable insulating material such as Bakelite. It is held in place on the back plate 68 by a screw 8|.

Integrally formed with the housing 88 is an arm 82 which extends upwardly and to the left to form a bearing for one end of a shaft 84. The control lever 33 is rockably mounted on the shaft 84, as will hereinafter appear.

Referring now to the Figures 12 and 13, the construction of the insulating switch mounting block or housing 88 is shown in more detail. It will be noted that the housing 88 has a cavity 85 on the bottom of which a switch blade bracket 86 is secured. A terminal 81 is likewise secured to the bottom of the cavity 85. Terminal screws 88 and 89 serve to hold the bared ends of the conductors 34 in connection with the bracket 86 and terminal 81 respectively. A switch blade 98 of suitable resilient conducting material extends from the bracket 86 through a slot 9| in the rim of the housing 88. The switch blade 98 carries a contact button 92 which engages a contact button 93 that is carried by a contact bracket 94. The contact bracket 94 extends through the slot 91 in the housing 88 and is attached to a terminal 95. Contact spring fingers 96 and 91, as shown in Figure 13, are connected to the terminals 95 and 81 respectively and are held thereto and in the housing 88 by screws 98 and 99. It will be noted that the inturned ends of the contact spring fingers 96 and 91 register with the slots 45 and are arranged to be engaged by the prongs of the plug that is attached to the conductors connected to the mechanism thereby energized as previously described. It will now be apparent that the contact spring fingers 96 and 91 are energized from the current source through the conductors 34 when the switch blade 98 is in the position shown in Figure 12 with the contact buttons 92 and 93 in engagement.

It will also be observed that the conductors 14 which serve to energize the motor 15 are connected for energization to the conductors 34 by the terminal screws 88 and 89.

In order to interrupt the circuit to the contact spring fingers 96 and 91, provision is made for separating the contact button 92 from the contact button 93 by moving the switch blade 98 in a counterclockwise direction, as viewed in Figure 12. For this purpose the outer end of the switch blade 98 is apertured as indicated at I88 for receiving therethrough a nose portion I8I Figure 4, of a switch operating arm I82 that is rockably mounted on the shaft 84. The arm I82 is formed preferably of suitable insulating material such as Bakelite. The manner in which the arm I82 is operated to control the position of the switch blade 98 will be set forth in detail hereinafter.

As shown in Figure 13 an insulating cover I83 closes the cavity 85 in the housing 88. It is formed of suitable insulating material such as fish paper.

As shown in Figure 6, the adjustable dial 21 comprises two plates I81 and I88 which may be fastened together by rivets I89. The plate I81 is of smaller diameter than the plate I88, is provided with a suitable attractive finish and carries the index 28. The outer edge of the plate I88 is toothed as indicated for cooperation with the teeth of a shrouded dial gear H8 that is mounted for rotation with the shaft 56. It will now be apparent from a consideration of Figure 5 that rotation of the nob 55 on the shaft 56 causes rotation of the shrouded dial gear II8 which in turn effects rotation of the dial 21. It is desirable that there be a certain amount of friction in the rotation of the shrouded dial gear II8 so that it will remain in any position to which it may be rotated. For this purpose the assume:-

forward end of. the shaft 56: projects. through a hubv III that is: fastened to. the base plate 68 and: which is surrounded by a; coil compression spring II2 that reacts between. the base plate 68 and a. cone-shaped washer I I31that bears against the backside of the: shrouded dial gear III]. It will be understood-I that the spring H2 acting through the washer II3 provides sufiicient frictional drag on the dial gear III) as to hold= it in any position at which it may be operated and that it likewise holds the dial 2"! in corresponding position.

The adjustable dial 2'! carries a triangularly shaped trip pin I I4, Figured which extends rearwardl from the toothed disc 58. The trip pin I I4 is, of course, movablewith the adjustabledial 21- and' serves, as will hereinafter appear, to release the trip mechanism for causing the desired operation of the alarm and switch mechanisms.

The adjustable dial 2? is relatively flexible. It is desirable that it be held substantially in the plane shown in thedrawings for proper operation; The forward face of the disc I08 rotates immediately back of the inner edge of the dial 22, Figure 1, and thus is held from moving forwardly thereby. Tabs H and 5 I5, Figure 7, are cut out of the base plate 58 and are bent forwardly thereto in such position as to provide a slight clearance space between the ends and the rear surface of the disc I58. In addition anose It! is integrally formed with and projects from a control lever bracket I18 which forms a support for the other end of the shaft 85 and which may be secured to the base plate 68 by screws II9. Thus a three-point support is provided by the tabs H5 and Ill-3 and the nose II? for limiting the rearward movement of the dial 2'].

As shown more clearly in Figure 14 the shaft l8 which, it will be recalled, is driven at a speed of one revolution per hour, carries at its forward end a pinion E23 which meshes with an idler gear wheel i2 3 that in turn drives a pinion I25. The pinion I25, Figure 7, meshes with and drives a time wheel 26 in a clockwise direction as indieated by the arrow i2l. The gear reduction. is such that the time wheel I26 makes one revolution in twelve hours.

As shown in Figure 8 the time wheel. E25 is mounted for rotation with a hub I28 that is rotatably mounted on a tubular bearing sleeve I29 from which a circular flange I30 projects. The flange i3!) is. secured asby rivets IZI' to the back plate 58.

Rotatably mounted on another step on the hub I28 is a ratchet wheel. 34, Figures 7-8,. which carries an arm 555, Figure 5, from which a trip pin 53? extends through an aperture I38, Fig ure 14, in the base plate 58. The trip pin I3], as shown, has a square cross section and its outer end is reduced for receiving one. end of a coil tension spring I55, Figure 5, the other end of which is anchored to a tab Mi struck rearwardly from the base plate 58, Figure 4. The spring MI! serves to bias the stop pin I137 against a stop M2, Figure 14, that is formed with base plate 6.8. and projects into the aperture I58.

Mounted on the rear side of the time wheel I25, Figure 8, is a pawl I43 which is arranged to cooperate with the teeth of the ratchet wheel I134. The pawl E43 is carried by a pin I44 which projects through the time wheel I25 and carries at its other end a pawl actuating arm I45. It will be understood that the pawl I43 is movable with the arm I45 through the pin I44 which is.

8 rockable mounted; on the time wheel. I126. The arm I: is biased in. a clockwise direction. by a coik tension spring I46 which extends between a hook portion I4 1" of the. arm I45and. a. tab I48 that is struck out of the time wheel. I26. The spring MB serves to rock the pawl I43. into engagement with the teeth of the ratchet wheel I34. This engagement takes place once during.

each; revolution of the time wheel I126, as will hereinafter appear. Otherwise the pawl In is held out. of; engagement with the teeth of the ratchet wheel; I 34 by. an actuating member I49 one. end Iz5l't of which engages. a nose portion I5I of the arm I45. The actuating member I49. is rockablymounted. on a pin I52 which extends from the time wheel. I25. The actuating member I49. is. biased in a clockwise direction about the pin I52; by a coil tension spring r53 which is connected between. a. hook. portion I54 of the member I49; and. a tab I55- which is struck up from the time wheel I25. It will be understood that the spring 553 holds the actuating member I49 in the position. shown in Figure '7 with the end portion I-5ll in engagement with the nose I5I of. the arm I45, thereby holding the pawl I43 out: of engagement with the ratchet wheel I34. against the biasing force of the spring I46.

In order to move the actuating member I49 a dog I561 is pivoted thereon by a pin. I51. The dog I56 has a nose portion I58 which is arranged to: be engaged by the trip. pin H 4 either when the time wheel moves. the dog I56 to the proper position. or the dial 211 is manually rotated. to preset the same.

It is desirable that. no movement of the actuating member I49 take place when the trip pin H4 is moved past the dog I56 in a clockwise direction. Forthis purpose the dog I55 is provided with inclined edge I59 leading to the nose I58 and; the dog Ii56 is slotted as indicated at ISO to permit a slight movement relative to the pin I52. It will be understood that when the trip pin H4 is moved in a clockwise direction relative to the dog I55, it will merely slide along the inclined edge- I 59 and the dog I56 rocks in a clockwise direction as permitted by the slot I60 until it passes the tip ofthe nose I58.

As shown in Figure 7- the dog I56 may be biased by a coil compression spring I62 which reacts between thedog I56 and a tab I63struck up from the actuating member I49.

When the nose I58- is moved into engagement with the trip pin I I4, either as by rotation of the time wheel I26 in the clockwise direction or a. movement ofthe trip pin H4 in a counterclockwise direction, the trip pin IIlI engages a radial face I'GI. of' the dog. I56. Continued relative movement of the trip pin H4 and the dog I56 causes the actuating member I49 to be rocked in a counterclockwise direction thereby withdrawing the end. I'5IT of the member I49 from engagement with the nose I5I' of the arm I45 and permitting the spring I46; to move the pawl I43 into engagement with the teeth of the ratchet wheel As the relative. movement of the trip pin H4 and the dog, I56-v continues the actuating member I49. rocks andspring. I153 is tensioned. The actuating member. I49 is thus. moved about the pin E52 until. the, nose I58. is moved past the trip pin I I4. The actuating member I49 is then released for movement with. a snap action. under the force of spring. I53 so that the end I 50 of. the actuating member I49 strikes the nose I5I of the arm I45 a blow or impacts the same- A corresponding movement is imparted through the pawl I43 to the ratchet wheel I34 and the stop pin I31, Figure 14, carried thereby is moved away from the stop I42. This movement of the stop pin I31, as will hereinafter appear, serves to release control mechanism which in turn effects operation of the alarm and switch mechanism.

Referring now to Figure 14 it will be observed that a multiple stop plate I61 is there shown. The stop plate I61 is fast on shaft 84 and is arranged to be biased in a clockwise direction by a coil spring I68 one end I69 of which bears against the lower portion of thecontrol lever bracket I I8 while the other end I18 bears against a tab I1I that is struck up from the plate I61. The plate I61 has an arcuate opening I12 along the inner edge of which flattened stop portions I13 and I14 are located for successively engaging the stop pin I151. The outer surface of the arouate slot I 12 has a flat surface I15 intermediate the stops H3 and I14. The purpose of the flat surface I15 is to limit the outward movement of the stop pin I31 when it leaves the stop I13 and to direct it into engagement with the stop I14 when the stop plate IE1 is moved in a clockwise direction by the spring I68. The lower end of the arcuate slot I12 is closed by a tail portion I16 which serves to strengthen the plate I61 and hold the portions thereof forming the slot I12 in alignment. A stop, in the form of a tab I11 struck up from the base plate 68, serves to limit the movement of the stop plate I61 in a clockwise direction.

With a view to moving the stop pin I 31 out of engagement with either of the stops I13 or I14 with which it may be engaged for the-purpose of manually adjusting the position of the stop plate I61 a flat edge I18 of a pin release arm I19 is arranged to engage the stop pin I31 in either of these two positions. is rockably mounted on the stop plate I61 by a pin 188. A spring I8! serves to hold the pin release arm I19 in the retracted position. It will be observed that the spring I 8| is fastened between a tab I82 struck up from an inner extension of the control lever 33 and a hook I83 extending from a shoulder portion I 84 integrally formed with the pin release arm I19.

The pin release arm I19 is moved by the control lever 83 through the agency of a nose I85 integrally formed with the latter and bearing against the shoulder I84. The control lever 33 has limited movement relative to the stop plate I61 as permitted by a notch I86 at the inner end in which the tab I1I extending from the stop plate I61 projects. Thus when the control lever 33 occupies the position shown in either Figure 17 or Figure 19, movement of the control lever 33 in a clockwise direction causes the pin release arm I19 to be moved so as to lift the stop pin I31 out of engagement with the stops I14 and I13 respectively thereby permitting the spring I68 to move the stop plate I61 to the next position.

As shown in Figures 14, 15 and 16 the control lever 33 has a rearwardly turned shoulder I98 which, in the position shown in Figure 14, is arranged to abut an extension I9I of the base plate 68 thereby holding the control lever in the position shown in Figure 3d. When it is desired to move the control lever to the position shown in Figure 3c, the control lever 33 is shifted toward the front, as shown in Figure 16, against the spring I68 until the shoulder I98 clears the extension I9I. The spring I68 then moves the The pin release arm I19 stop plate I61 until it rests against the stop I11, Figure 14.

Mounted for rotation with the shaft 84 and the stop plate I61 is a cam I92, Figures 5-17, having a nose I93 that is arranged to engage a pin #94 which extends through the switch operating arm I 82, Figure 4, for moving the same so as to separate the contact buttons 92 and 93, thereby opening the switch. The switch operating arm I82 is slotted as indicated at I95, Figure 17, so as to permit relative movement with respect to the shaft 84.

As shown more clearly in Figure 4, a stop I96 is integrally formed with the base plate 68 for cooperating with the shoulder I98 of the control lever 33 for holding the same in. the position shown in Figures 3b and 19. When it is desired to move the control lever 33 to the position shown in Figures 3a and 18, the control lever 33 is moved, as indicated in Figure 16, to such position that the shoulder I98 clears the stop i963 whereupon the control lever 33 is moved against the biasing force of the spring I68 until the shoulder I98 engages the stop I96, as shown in Figure 18. In this position neither the alarm nor the switch mechanism is operable.

The mechanism for ringing the bell 68 will now be described. As shown in Figure 14 a bell hammer I89 is arranged to strike the inside of the bell 68, Figure 5. The hammer I99 is located on the rear side of the base plate 68 and is carried by an arm 288 which projects from the front side of the base plate 68 through an aperture 28! therein. The aperture 28! is generally rectangular to permit the hammer I99 and arm 288 to rock for striking the bell 68. At its upper end the arm 288 is rockably mounted by a screw 282 on a tab 283 which is struck up from the base plate 68. For reciprocating the arm 288 shoulders 284 and 285 are provided on a connecting rod 286 which is arranged to be oscillated with the arm 288 between the shoulders 204 and 285. The connecting rod 266 has an inverted V-shaped notch 281 which interfits with an off-center pin 288 carried by a pinion 289 which forms a part of the gear train that is driven by the motor 15. It will be understood that the rotary movement of the pinion 289 is translated by the pin 288 into reciprocatory movement of the connecting rod 286. In turn this movement of the connecting rod 286 causes the arm 298 to oscillate and the hammer I99 to strike the bell 68. The parts are so proportioned that when the hammer I99 strikes the bell 68, it is moving freely, i. e., the arm 288 is out of engagement with the shoulder 285,

The connecting rod 286 is guided in its reciprocatory movement by a lug -2I8 which proiects into a slot 2H in the base plate 68.

In order to provide for moving the connecting rod 286 to the inoperative position, as shown in Figures 17, 18, 19 and 20, it is provided with a forwardly turned shoulder 2I2 with which a nose 2I3 of an alarm release lever ZI4 is arranged to engage, as shown in these figures. The alarm release lever 2M is rockably mounted by a screw 2I5 on the base plate 68 and has a nose portion 2I6 which is arranged to be engaged by the outer circular edge 2I1 of the stop plate 161. The edge M1 is recessed as indicated at 2| 8 to permit the nose ZIG to move therein and thereby permit the alarm release lever M4 to rock in a clockwise direction to the position shown in Figure 14.

The alarm release lever 2I4 is biased in a clockwise direction by a coil compression spring 222 which bears against a depending arm 223 and against one tine 224-, Figure 5, of the cut-out slide 55. Another tine 225 of the cut-out slide 53 is arranged to move back of the depending mm 223 for holding the alarm release lever M4 in the position thereof, shown in Figures 174849-20 of the drawings.

It will thus be seen that the position of the alarm release lever 2I4 may be controlled not only by the control lever 33 but also by the cutout slide 58. Thus, if it is desired that the alarm not be sounded at the time that the switch mechanism is operated, the cut-out slide 58 may be left in the innermost position where it looks the alarm release lever H4 in the position shown in Figure 18, for example. Thus, even though the stop plate I61 occupies the position shown in Figure 14, the nose 2I6 is prevented from movin into the recess 2I8.

In describing the operation of the clock mechanism disclosed herein attention is called to the fact that the control lever 33 may be manually set to any of the positions thereof shown in Figures 3a-3e. If it is desired that the clock mechanism be used only for the purpose of indicating time, then the control lever 33 s positioned as shown in Figure 3a and in Figure 18. Here it will be observed that the shoulder I90 is locked behind the stop I95, the switch blade 90 is in the open position with the contact buttons 92 and 93 separated and the alarm release lever 2I4 holds the connecting rod 206 in the inoperative position. Thus even though the cut-out slide 58 may be withdrawn to the position shown in Figure 5, the alarm mechanism is held inoperative.

But when it is desired to preset the mechanism to operate at any time in the second twelve. hours, the control lever 33 is moved to compress the spring I58, as indicated in Figure 16, and the spring I88 moves the stop plate I61 until the stop I13 engages the stop pin I31, as shown in Figure 19. The corresponding position of the control lever 33 is shown in Figure 3b. Either 1 before or after shifting the control lever 33 to the position shown in Figure 3b the control set nob is turned to set the adjustable dial 21 so that the index 23 is located at the time in the second 12 hours that it is desired to have the alarm and switch mechanism functioning. It will be understood that the adjustable dial 21 may have been set previously to this desired time. In such case all that is necessary is to release the control lever 33 for movement to the position shown in Figure 31).

When the'adjustable dial 21 is moved to the preset position, the trip pin H4, Figure '1, carried thereby is set in a corresponding position to engage the radial edge IIiI of the dog I56 when the time wheel I26 is rotated by the motor 15 to the corresponding position. The continued rotation of the time wheel I25 causes the actuating member M9 to rock above its pivot pin I52. As previously described the first result of this movement is to permit the spring I45 to move the pawl actuating arm I45 so as to bring the pawl I43 into engagement with the ratchet wheel I34. The dog I55 is released from the trip pin H4 at the time in the first 12 hours which is 12 hours ahead of the preset time. The actuating member I48 then moves with a snap action under the force applied by the spring I53 to impact the arm I45. This causes the ratchet wheel I34 to be rocked slightly and to carry with it the stop pin I31 out of engagement with the stop I13. The spring I68 immediately moves the stop plate I61 in a clockwise direction and the flat edge I15 of the arcuate slot I12 directs the stop pin l3! into engagement with the stop I14, as shown in Figure 17. In this position it will be noted that the contact buttons 92 and 93 of the switch mechanism are still separated and that the alarm release lever 2I4 is still held in the inoperative position. It will be noted further that the control lever 33 has been moved to the position shown in Figure 3c.

The time wheel I26 continues to rotate through the next twelve hours whereupon the nose I58 of the dog I56 again engages the trip pin H4 and the stop pin I31 is again moved as previously described by movement of the ratchet wheel I34. In both instances the stop pin I31 moves away from the stop I42. The movement of the ratchet wheel I34 causes the stop pin I31 to move out of engagement with the stop I14 and thereupon the spring I58 swings the stop plate I61 to the position shown in Figure 14. Here its movement in clockwise direction is limited by the shoulder I50 engaging the extension I9I. In this position. the nose I93 of the cam I92 moves out of engagement with the pin I 3-4 and the switch operating arm IE2 is moved relative to the shaft 83 by the inherent resiliency of the switch blade 3!) until the circuit is completed through the contact buttons 92 and 93. The circuit is then completed. for energizing the device such as the electrical appliance, radio and the like.

In this position. of the multiple stop plate I61 the nose H6 of the alarm release lever H4 is located in the recess 2 I8, assuming that the cutout slide I58 has been withdrawn, the spring 222 urging the alarm release lever 2I'4 to this position. The connecting rod 205 then moves so that the pin: 208 is engagedv and the connecting rod is oscillated thereby. The hammer I99 then repeatedly strikes the bell 5D to give the alarm and notify the operator that the switch has been closed.

The alarm continuesto ring until the control lever 33 either is moved to the position shown in Figure 3e and in Figure 20 where the switch remains closed while the alarm is shut off or the control lever 33 is moved to any of the positions shown in Figures 3a3b3c where both the switch. and the alarm are cut off.

When the controllever 33 is moved to the position shown in Figure 31), it will be understood that the numerals 24 on the indicator plate 33 will appear in the aperture 64. Thus by inspeoting the indicator plate 63 it is possible to quickly determine the operative condition of the clock. After the stop pin I31 has been moved away from the stop I13, either by actuation of the ratchet wheel I34 or by manual operation as a result of movement of the pin release arm I19, the stop plate IE1 is moved by the spring I68 until the stop pin I31 engages the stop I14. In this position the numerals 12 on the indicator plate 63 are visible in the aperture 64, as shown in Figure 3. If desired, suitable indicia may be provided on the indicator plate 83 which will be visible for the positions of the control lever 33 as indicated in Figures 3a3d3e.

If it is desired that the alarm and/or switch be operated at any time during the next twelve hours, the control lever 33 is initially set to the position shown in Figures 30-17. The dog 56 in its first engagement thereafter with the trip pin II4 will effect movement of the stop plate I61 to the position shown in Figure 14 where, if the cut-out slide 58 is withdrawn, both the alarm and the switch will be operated. The control lever 33, as before, may then be moved to the position shown in Figures 3e-20 where the alarm will be cut out while the switch will remain closed.

It will now be apparent that the present invention provides for operating an alarm signal and a switch at any time in either a first or second 12 hour period. The alarm indicates that the switch has been actuated. On the further movement of the control lever 33 the alarm may be cut out while the switch remains closed. A1- ternatively the alarm cut-out slide 58 may be moved inwardly so as to prevent operation of the alarm until the same is withdrawn.

Ordinarily after the electrical apparatus has been operated for the desired period of time, it may be de-energized by moving the control lever 33 to any of the positions shown in Figures 301 3b-3c. If the control lever 33 is moved back to the position shown in Figure 3a then, of course, no operation can take place. However, if the control lever 33 is reset to the position shown in Figure 3b, the alarm will be operated, assuming that the cut-out slide 58 is withdrawn, and the switch will be closed at the preset time during the second succeeding twelve hours. For example, it may be desired to have a radio set turned on at seven oclock each evening. The index 28 is adjusted by the control set nob 55 to a position opposite the numeral 1 on the dial 22. The control lever 33 is moved to the position shown in Figure 3b and the cut-out slide 58 is withdrawn. After the alarm has been operated and the switch closed and the radio set has been energized for the desired interval, the control lever 33 can be reset to the position shown in Figure 3b. Thereupon the cycle of operations previously described will be repeated.

Since certain further changes can be made in the foregoing construction and different embodiments of the invention can be made without departing from the spirit and scope thereof, it is intended that all matter shown on the accompanying drawings and described hereinbefore shall be interpreted as illustrative and not in a limiting sense.

What is claimed as new is:

1. A timing mechanism comprising, in combination, a time wheel arranged to be rotated once every twelve hours, tripping means thereon, mechanism to be operated at a predetermined time more than twelve hours after a given time, means arranged to be operated by said tripping means from a first position to a second position during one revolution of said time wheel without operating said mechanism and from said second position to a third position during the next revolution of said time wheel to effect operation of said mechanism, a member for operating said tripping means, and means for manually preset ting said member.

2. A timing mechanism comprising, in combination, a time wheel arranged to be rotated once every twelve hours, tripping means thereon, mechanism to be operated at a predetermined time more than twelve hours after a given time, means arranged to be operated by said tripping means from a first position to a second position during one revolution of said time wheel without operating said mechanism and from said second position to a third position during the next revolution of said time wheel to effect operation of said mechanism, manually operable means for presetting said means in said first position, a member for operating said tripping means, and means for manually presetting said member.

3. A timing mechanism comprising, in combination, a time wheel arranged to be rotated once every twelve hours, tripping means thereon, an alarm mechanism and a switch mechanism to be operated at a predetermined time more than twelve hours after a given time, means arranged to be operated by said tripping means from a first position to a second position during one revolution of said time wheel without operating either of said mechanisms and from said second position to a third position during the next revolution thereof to effect operation of both of said mechanisms, manually operable means for moving said means to a fourth position to restore said alarm mechanism to the inoperative condition while leaving said switch mechanism in the operated condition, a member for operating said tripping means, and means for manually presetting said member.

4. A timing mechanism comprising, in combination, a time wheel arranged to be rotated once every twelve hours, tripping means thereon, an alarm mechanism and a switch mechanism to be operated at a predetermined time more than twelve hours after a given time, means arranged to be operated by said tripping means from a first position to a second position during one revolution of said time wheel without operating either of said mechanisms and from said second position to a third position during the next revolution thereof to eifect operation of both of said mechanisms, manually operable means for presetting said means in said first position and moving said means to a fourth position to restore said alarm mechanism to the inoperative condition while leaving said switch mechanism in the operated condition, a member for operating said tripping means, and means for manually presetting said member.

5. A timing mechanism comprising, in combination, a time wheel arranged to be rotated once every twelve hours, tripping means thereon, and alarm mechanism to be operated at a predetermined time more than twelve hours after a given time, means arranged to be operated by said tripping means from a first position to a second position during one revolution of said time wheel without operating said alarm mechanism and from said second position to a third position during the next revolution thereof to efiect operation of said alarm mechanism, manually operable means means for moving said means to a fourth position to restore said alarm mechanism to the inoperative condition, a member for operating said tripping means, and means for manually presetting said member.

6. A timing mechanism comprising, in combination, a time wheel arranged to be rotated once every twelve hours, tripping means thereon, a switch mechanism to be operated at a predetermined time more than twelve hours after a given time, means arranged to be operated by said tripping means from a first position to a second position during one revolution of said time Wheel without operating said alarm mechanism and from said second position to a third position during the next revolution thereof to effect operation of said switch mechanism, manually operable means for moving said means to a fourth position to restore said alarm mechanism to the inoperative condition while leaving said switch mechanism in the operated condition, a member for operating said tripping means, and means for manually presetting said member.

'7. A timing mechanism comprising, in combination, a timing motor, a switch, a multiple stop lever for operating said switch, said lever being arranged to be located in at least four different positions, spring means for moving said lever from a first position to the other positions, looking means for holding said lever in its first position, manual means for releasing said locking means to permit said lever to move to its second position, cyclically operable means driven by said motor, and trip means operated by said cyclically operable means during one cycle of its operation for releasing said lever to move to its third position and during the next cycle for releasing said lever to move to its fourth position whereupon said switch is operated from one position to another.

8. A timing mechanism comprising, in combination, a timing motor, a switch, an alarm signal, a multiple stop lever for operating said switch and signal, said lever being arranged to be located in five different positions, spring means for moving said lever from a first position to the other positions, locking means for holding said lever in its first position, manual means for releasing said locking means to permit said lever to move to its second position, cyclically operable means driven by said motor, manually presettable trip means operated by said cyclically operable means during one cycle of its operation for releasing said lever to move to its third position and during the next 'cycle for releasing said lever to move to its fourth position whereupon said switch is operated from one position to another and said alarm signal is operated, and stop means for arresting said lever in said fourth position, said manual means being operable to permit said lever to move past said stop means to its fifth position in which said alarm signal ceases to operate while said switch is unaffected.

9. A timing mechanism comprising, in combination, a timing motor, an alarm signal, a multiple stop lever for operating said signal, said lever being arranged to be located in five different positions, spring means for moving said lever from a first position to the other positions, looking means for holding said lever in its first position, manual means for releasing said locking means to permit said lever to move to its second position, cyclically operable means driven by said motor, manually presettable trip means operated by said cyclically operable means during one cycle of its operation for releasing said lever to move to its third position and during the next cycle for releasing said lever to move to its fourth position whereupon said alarm signal is operated, and stop means for arresting said lever in said fourth position, said manual means being operable to permit said lever to move past said stop means to its fifth position in which said alarm signal ceases to operate.

10. A timing mechanism comprising, in combination, a base plate, a synchronous motor thereon, a time wheel rotatably mounted on said base plate and driven by said motor; a tripping mechanism comprising a pawl rockably mounted on one side of said time wheel, an actuating arm connected to and movable with said pawl and disposed on the other side of said time wheel, a spring biasing said actuating arm, an actuating member pivotally mounted on said time wheel, a spring for biasing said actuating member to im- '16 pact said actuating arm and holding the same against the biasing force of its spring, a dog pivoted on said actuating member and having lim ited movement relative thereto, and a spring biasing said dog outwardly with respect to said actuating member; a ratchet wheel coaxially mounted with said time wheel and rockable independently thereof and arranged to be engaged by said pawl when said actuating arm is disengaged by said actuating member and the former is free to be moved by its spring, a stop pin extending from said ratchet wheel through an aperture in said base plate, a stop finger in said aperture integral with said base plate, a spring interconnecting said stop pin and said base plate for biasing the former against said step finger, a dial rotatable coaxially with and independently of said time wheel. manual means for rotating said dial to any desired position, a trip pin carried by said dial and disposed on rotation thereof in one direction to pass by said dog without moving said actuating member and on relative rotation in the opposite direction with respect to said time wheel to rock said actuating member and tension its spring and then release the same to strike said actuating arm whereupon said ratchet wheel is rocked by said pawl to move said stop pin away from said stop finger, a shaft rockably mounted normal to said base plate, a multiple stop lever carried by said shaft, a spring biasing said multiple stop lever, a plurality of steps on said multiple stop lever arranged to be engaged successively by said stop pin whereby said lever is held in positions corresponding to said steps, said steps being located along the inside of an arcuate slot in said lever the outer side of which serves to direct the movement of said stop pin on disengaging one step in response to actuation of said ratchet wheel into engagement with the next step, a manually operable control lever rockably mounted on said shaft and having limited movement relative to said multiple stop lever for moving the same to its various operative positions, an arm rockably mounted on said multiple stop lever and operable by said control lever during said limited movement thereof for moving said stop pin off of said steps to permit said multiple stop lever to be moved by its spring to the next position thereof, a spring for holding said arm on said stop lever in retracted position, a cam rotatable with said shaft, a switch operated by said cam to the closed position only after said stop pin has been moved out of engagement with the last of said steps and said multiple stop lever has been moved to the next position by its spring, an alarm bell hammer pivoted on said base plate for striking an alarm bell, means including a connecting rod operatively interconnecting said motor and said bell hammer for reciprocating the latter to ring the bell, an alarm release lever rockably mounted on said base plate and arranged in operative position to cooperate with said connecting rod for disestablishing said operative connection between said motor and said bell hammer, a nose portion on said alarm release lever arranged to be engaged by the outer curved surface of said multiple stop lever for holding said alarm release lever in its operative position, said outer curved surface having a re-entrant portion for receiving said nose portion only when said multiple stop lever has been moved to its said next position to permit said release lever to move to inoperative position, and manually operable means for locking said alarm release lever in operative position.

11. A timing mechanism comprising, in combination, a base plate, a synchronous motor thereon, a time wheel rotatably mounted on said base plate and driven by said motor; a tripping mechanism comprising a pawl rockably mounted on one side of said time wheel, an actuating arm connected to and movable with said pawl and disposed on the other side of said time wheel, a spring biasing said actuating arm, an actuating member pivotally mounted on said time wheel, a spring for biasing said actuating member to impact said actuating arm and holding the same against the biasing force of its spring, a dog pivoted on said actuating member and having limited movement relative thereto, and a spring biasing said dog outwardly with respect to said actuating member; a ratchet wheel coaxially mounted with said time wheel and rockable independently thereof and arranged to be engaged by said pawl when said actuating arm is disengaged by said actuating member and the former is free to be moved by its spring, a stop pin extending from said ratchet wheel through an aperture in said base plate, a stop finger in said aperture integral with said base plate, a spring 1 interconnecting said stop pin and said base plate for biasing the former against said stop finger, a dial rotatable coaxially with and independently of said time wheel, manual means for rotating said dial to any desired position, a trip pin carmounted normal to said base plate, a multiple i stop lever carried by said shaft, a spring biasing said multiple stop lever, a plurality of steps on said multiple stop lever arranged to be engaged successively by said stop pin whereby said lever is held in positions corresponding to said steps, said steps being located along the inside of an arcuate slot in said lever the outer side of which serves to direct the movement of said stop pin on disengaging one step in response to actuation of said ratchet wheel into engagement with the next step, a manually operable control lever rockably mounted on said shaft and having limited movement relative to said multiple stop lever for moving the same to its various operative positions, an arm rockably mounted on said multiple stop lever and operable by said control lever during said limited movement thereof for moving said stop pin off of said steps to permit said multiple stop lever to be moved by its spring to the next position thereof, a spring for holding said arm on said stop lever in retracted position, and mechanism operatively connected to said multiple stop lever and arranged to be operated thereby when it occupies certain of its operative positions.

12. A timing mechanism comprising, in combination, a base plate, a synchronous motor thereon, a time wheel rotatably mounted on said base plate and driven by said motor; a tripping mechanism comprising a pawl rockably mounted on one side of said time wheel, an actuating arm connected to and movable with said pawl and disposed on the other side of said time wheel, a spring biasing said actuating arm, an actuating member pivotally mounted on said time wheel, a

18 spring for biasing said actuating member to impact said actuating arm and holding the same against the biasing force of its spring, a dog pivoted on said actuating member and having limited movement relative thereto, and a spring biasing said dog outwardly with respect to said actuating member; a ratchet wheel coaxially mounted with said time wheel and rockable independently thereof and arranged to be engaged by said pawl when said actuating arm is disengaged by said actuating member and the former is free to be moved by its spring, a stop pin extending from said ratchet wheel through an aperture in said base plate, a stop finger in said aperture integral with said base plate, a spring interconnecting said stop pin and said base plate for biasing the former against said stop finger, a dial rotatable coaxially with and independently of said time wheel, manual means for rotating said dial to any desired position, a trip pin carried by said dial and disposed on rotation thereof in one direction to pass by said dog without moving said actuating member and on relative rotation in the opposite direction with respect to said time wheel to rock said actuating member and tension its spring and then release the same to strike said actuating arm whereupon said ratchet wheel is rocked by said pawl to move said stop pin away from said stop finger, a shaft rockably mounted normal to said base plate, a multiple stop lever carried by said shaft, a spring biasing said multiple stop lever, a plurality of steps on said multiple stop lever arranged to be engaged successively by said stop pin whereby said lever is held in positions corresponding to said steps, said steps being located along the inside of an arcuate slot in said lever the outer side of which serves to direct the movement of said stop pin on disengaging one step in response to actuation of said ratchet wheel into engagement with the next step, a manually operable control lever rockably mounted on said shaft and having limited movement relative to said multiple stop lever for moving the same to its various operative positions, an arm rockably mounted on said multiple stop lever and operable by said control lever during said limited movement thereof for moving said stop pin off of said steps to permit said multiple stop lever to be moved by its spring to the next position thereof, a spring for holding said arm on said stop lever in retracted position, a cam rotatable with said shaft, and a switch operated by said cam to the closed position only after said stop pin has been moved out of engagement with the last of said steps and said multiple stop lever has been moved to the next position by its spring.

13. A timing mechanism comprising, in combination, a base plate, a synchronous motor thereon, a time wheel rotatably mounted on said base plate and driven by said motor; a tripping mechanism comprising a pawl rockably mounted on one side of said time wheel, an actuating arm connected to and movable With said pawl and disposed on the other side of said time wheel, a spring biasing said actuating arm, an actuating member pivotally mounted on said time wheel and carryingan operating dog, and a spring for biasing said actuating member to impact said actuating arm and holding the same against the biasing force of its spring; a ratchet wheel coaxially mounted with said time wheel and rockable independently thereof and arranged t be engaged by said pawl when said actuating arm is disengaged by said, actuating member and the 19 former is free to be moved by its spring, a stop pin extending from said ratchet wheel, stop means on said base plate for said stop pin, spring means biasing said stop pin against said stop means, a dial manually rotatable coaxially with and independently of said time Wheel, a trip pin carriedby said dial for engaging said dog to rock said actuating member and tension its spring and then release the same to strike said actuating arm whereupon said ratchet wheel is rocked by said pawl to move said stop pinaway from said stop means, a multiple stop lever carried b said base plate, a spring biasing said multiple stop lever, a plurality of steps on said multiple stop lever arranged to be engaged successively by said stop pin whereby said lever is held in positions corresponding to said steps, said steps being located along the inside of an arcuate slot in said lever the outer side of which serves to direct the movement of said stop pin on disengaging one step in response to actuation of said ratchet wheel into engagement with the next step, a mari ually operable control lever disposed in cooperative relation to said multiple stop lever for moving the same to its various operative positions, a switch arranged to be operated by said multiple stop lever from one position to another only after said stop pin has been moved out of engagement with the last of said steps and said multiple stop lever has been moved to the next position by its spring, an alarm signal, and means cooperating with said multiple stop lever when the same is in the switch operating position for efiecting the operation of said alarm signal, said control lever being operable to move said multiple stop lever beyond its said next position to render said alarm signal inoperative without changin the position of said switch.

14. A timing mechanism comprising, in combination, a base plate, a synchronous motor thereon, a time wheel rotatably mounted on said base plate and driven by said motor; a tripping mechanism comprising a pawl rockably mounted on one side of said time wheel, an actuating arm connected to and movable with said pawl and disposed on the other side of said time wheel, a spring biasing. said actuating arm, an actuating member pivotally mounted on said time wheel and carrying an operating dog, and a spring for biasing said actuating member to impact said actuating arm and holding the same against the biasing force of its spring; a ratchet wheel coaxially mounted with said time wheel and rockable independently thereof and arranged to be engaged by said pawl when said actuating arm is disengaged by said actuating member and the former is free to be moved by its spring, a stop pin extending from said ratchet wheel, stop means on said base plate for said stop pin, spring means biasing said stop pin against said stop means, a dial manuall rotatable coaXially with and independently of said time Wheel, a trip pin carried by said dial for engaging said dog to rock said actuating member and tension its spring and then release the same to strike said actuating arm whereupon said ratchet wheel is rocked by said pawl to move said stop pin away from said stop means, a multiple stop lever carried by said base plate, a spring biasing said multiple stop lever, a plurality of steps on said multiple stop lever arranged to be engaged successively by said stop pin whereby said lever is held in positions corresponding to said steps, said steps being located along the inside of an arcuate slot in said lever the outer side of which serves to direct the mdvenient of said top pin on disengaging one step in response to actuation of said ratchet wheel into engagement with the next step, a manua ly operable control lever disposed in cooperative relation to said multiple stop lever for moving the same to its various operative positions, and mechanism operatively connected to said multiple stop lever and arranged to be operated thereby when it occupies certain of its operative positions.

15. A timing mechanism comprising, in combination, a base plate, a synchronous motor thereon, a time wheel rotatably mounted on said base plate and driven by said motor; a tripping mechanism comprising a pawl rockably mounted on one side of said time wheel, an actuating arm connected to and movable with said pawl and disposed on the other side of said time wheel, a spring biasing said actuating arm, an actuating member pivotally mounted on said time wheel and carrying an operating dog, and a. spring for biasing said actuating member to impact said actuating arm and holding the same against the biasing force of its spring; a ratchet wheel coaxially mounted with said time wheel and rockable independently thereof and arranged to beengaged by said pawl when said actuating arm is disengaged by said actuating member and the former is free to be moved by its spring, a stop pin extending from said ratchet wheel, stop means on said base plate for said stop pin, spring means biasing said stop pin against said stop means, a dial manually rotatable coaxially with and independently of said time wheel, a trip pin carried by said dial for engaging said dog to rock said actuating member and tension its spring and then release the same to strike said actuating arm whereupon said ratchet wheel is rocked by said pawl to move said stop pin away from said stop means, a multiple stop lever carried by said base plate, a. spring. biasing said multiple stop lever, a plurality of steps on said multiple stop lever arranged to be engaged successively by said stop pin whereby said lever is held in positions corresponding to said steps, said steps being located along the inside of an arcuate slot in said lever the outer side of which serves to direct the movement of said stop pin on disengaging one step in response to actuation of said ratchet wheel into engagement with the next step, a manually operable control lever disposed in cooperative relation to said multiple stop lever for moving the same to its various operative positions, and a switch arranged to be operated by said multiple stop lever from one position to another only after said stop pin has been moved out of engagement with the last of said steps and said multiple stop lever has been moved to the next position by its spring.

WILLIAM P. GALLAGHER.

CARL WEBER.

PAUL E. SUTOR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 396,632 Waters Jan. 22, 1889 1,561,005 Levenstein Nov. 10, 1925 1,763,230 Frisch June 10, 1930 1,865,965 Ruiz July 5, 1932 2,081,289 Ayres May 25, 1937 2,200,110 Anderson May '7, 1940 2,232,519 Got! Feb. 18, 1941

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