US2092715A

US2092715A - Time controlled annunciator

Info

Publication number: US2092715A
Application number: US103161A
Authority: US
Inventors: John H Grayson
Original assignee: GRAYSON HEAT CONTROL Ltd
Current assignee: GRAYSON HEAT CONTROL Ltd
Priority date: 1936-09-29
Filing date: 1936-09-29
Publication date: 1937-09-07
Anticipated expiration: 1954-09-07

Description

Sept. 7, 1937.

J. H. GRAYSON 2,092,715

TIME CON TROLLED ANNUNCIATOR Filed Sept. 29, 1936 Patented Sept. 7, 931

UNITED STATES PATENT OFFICE 3,715 TIME CONTROLLED AKNUNCIATOB JohnlLG snsneaum September as. 1m, Serial No. 102,101 1 Claim. (01. 101-23) be required, she is apt, by reason of other distractions, to unconsciously prolong the period to the detriment of the food and sometimes to the i5 extent of its being spoiled by burning or overcooking.

My present invention is designed to announce to the cook by a suitable signal the fact that her attention is required, the length of time elapsing 20 before the signal is given being dependent upon a predetermined setting of the apparatus.

More specifically my invention aims to provide an annunciator of the character indicated which will be simplein construction, which will consist 25 of a minimum number of parts. which will be economical to manufacture and easy to manipulate by the user, and which will be accurate, reliable, and durable in operation.

The preferred embodiment of my invention,

30 which has been chosen for illustrative purposes.

is shown on the accompanying drawing.

Referring to which:

Fig. 1 is a front elevation of the apparatus;

Fig. 2 is a side elevation with the case shown 35 in section so as not to obscure the mechanisms;

Fig. 3 is a sectional view on the line 3-3 of Fig. 2;

Fig. 4 is a plan view with the case shown in section similarly to Fig. 2: and

40 Fig. 5 is a sectional view on the line H of Fig. 2.

On the drawing, reference character indicates generally the face of a clock, the mechanism of which is enclosed in the case I, the en- 45 tire assembly in the present instance being adapted to be mounted in a back panel 8 of a kitchen stove or in any other suitable support. The clock mechanism itself may be of thespring mosist of the usual pinions, gears, and other necessay mechanism, the details of which form no part of my present invention and are not here as illustrated except so far as may be necessary to an understanding of the application of my in-.

vention thereto.

Immediately behind the dial of the clock there is mounted upon the motor driven shaft ii a minute dial it, provided on its face with minute graduations II which are visible from the front of the clock through an opening it in the clock dial. This minute dial is rotatably mounted on and frictionaliy connected with the shaft ii so as to be rotatable thereby and also be capable 10 of manual adjustment relatively thereto. While a any suitable frictional driving connection between the shaft and the minute dial may be utilined, I have shown in the present instance the dial it as being cupped as shown at it to frictionally contact the face of a gear wheel II which.

through the usual clock train (not shown) is positively driven from the shaft ii. Through this frictional connection, rotation of the shaft I i is imparted to the minute dial I! so that it normally rotates with the clock mechanism.

The minute dial may be independently adjusted by a knob 22 fixed on the shaft ll which carries a pinion 24 meshing with the peripheral teeth of the dial l2. ,7 25

A gear I with which the clock hands are associated is connected through an idler I I with a pinion II on a shaft II, on the outer end of which the time setting knob or button If is mounted. The gear ll being also frictionally driven by the clock train, the setting of the hands of the clock may be accomplished by turning the knob 2|. The device by which the signal, either audible or visible, is given may in some instances be of a mechanical type although preferably an electric signal is employed and such type is here illustrated. The device as shown comprises an elecnetic armature 28 having one end anchored as at 29 and the other end upturned at 8| to constitute a striker adapted to impact against a sounding board I! of suitable material anchored through the back of the case 1 into engagement so with the sounding board. Alternate current energization of the coil II will cause the mature II to vibrate and thereby in-conjuuction with the sounding board produce an audible signal.

In this instance the armature pieces of the i with a depending shoulder 38 formed on a bell sured by a leaf spring 42 crank lever 31 which is fulcrumed at It to an ear 39 carried by a member ll of the clock frame. The upper end of this lever is adapted to abut against and hold the armature it against the sounding board 82 in the position shown in the drawing when the shoulder It is supported upon the minute dial as shown in but is adapted position shown is brought into alignment Movement of the lever from the tion to the dotted to retract into the dotted line in said figure when the slot 3! with the shoulder 80.

full line posiline position of Fig. 2 is enwhich overlies the lever as shown.

In order to maintain the signalling device inoperative, irrespective of the position of the slot 35 I have provided a manually operable throwout device comprising a'cam shaped member 43 fixed on a shaft 44, on 'the outer is mounted a knob 45. When this cam is turned to the position shown in full lines on Fig. 5. the high portion I thereoi engages beneath a shoulder 1 formed on the lever 31 and holds the lever up against the sounding board. when the cam, however, is rotated to the dotted line position shown in Fig. 5, it is withdrawn from. this shoulder so as to permit lever 31 to be urged against the minute dial under the influence oi the spring 42.

When no signal is required, the signalling device is held out of operation by the cam 33; but when the user desires to be signalled at a predeknob 22 the minute full lines in Fig. 2-

end of which when aligned therewith to thereby termined future time, the cam 38 is moved to in= operative positions and by manipulation oi the dial is turned to bring the number corresponding with the number oi minutes desired to elapse before the signal becomes efiective into the center or the opening it in the clock dial. The minute dial is now rotated by the clock mechanism in the usual way to bring the slot 35 after a predetermined interval for which the top has been set into alignment with the shoulder 38 whereupon the shoulder rides oil the face of the dial into said slot, permitting the lever 31 to withdraw from the armature 28 whereupon the operation of the signalling device is initiated. The device may be shut ofi by simply turning the knob ii to again project the lever 31 into engagement with the armature 28.

The structural details illustrated and described are capable of considerable modification without departing from the essence of the invention as defined in the following claim.

I claim:

In a time controlled annunciator, the combination of a clock driven shaft, a minute dial frictionally connected to said shaft so as to be driven thereby and be adjustable relatively thereto, said dial being provided on one face with indicia and being provided with a control slot spaced from the perimeter of the dial, an annunciating device including a vibrator, an angular lever fulcrumed in proximity to said disc and provided with a shoulder adapted to rest against the rear face of the dial whereby the free end of said lever is maintained in the path of said vibrator to preclude actuation oi thevibrator, said shoulder being adapted to enter said control slot inthe dial permit withdrawal oi the end of said lever from the path of said vibrator, a spring urging said shoulder toward said dial and manually operable means engageable with said lever for positioning the lever in vibrator holding position independently of said disc.

JOHN H. GRAYSON.