US1375973A - Timing device - Google Patents

Description

R. M. G. PHILLIPS.

TIMING DEVICE. APPLICATION FILED AUG. I9, 1918.

Patented Apr. 26, 1921.,

'2 SHEETS-SHEET I.

R. M. G. PHILLIPS.

TIMING DEVICE.

APPLICATION FILED AUG-l9, I918.

Patented Apr. 26, 1921.

2 SHEETSSHEET 2. 5"

ROSS M. G. PHILLIPS, OF NEW HAVEN, CONNECTICUT, A SSIGNOR TO THE PHILLIPS TIIVIE SWITCH 00., OF SHELTON, CONNECTICUT, A CORPORATION.

TIMING? DEVICE.

To all whom it may concern:

ie it known that 1, Ross M. G. PHILLIPS, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Timing Devices; and I do hereby declare the following, when taken in connection with the accom pa'iiying'clrawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute-part of this application, and represent, in

Figure 1 face view of a timing mechanism constructed in'accordance with my invention, and partly broken away.

Fig. 2 a side view ofithe same.

Fig. 3 an inside View of the outer plate of the timing mechanism illustrating the operating lever and showing the connection with the valve mechanism, and also showing the timing mechanism. I

Fig. 4 a side view of the same showing a vertical sectional view of the valve mechanism.

Fig. 5 an underside View of the valve.

Fig. 6 a modification.

Fig. 7 a sectional view on the line 77 of Fig. 8. I

Fig. 8 a perspective View of the firing cam, detached.

This invention relates to an improvement in timing devices such as are used in controlling the time which'an apparatus, such,

for instance, as gas stoves, water heaters, etc, shall operate. ranged closely adjacent to the apparatus which they control, but it is often desirable to set them in operation from a distant point, as for instance, to set a timing device in the kitchen from 'a room on the floor above. 7

The object of this invention is to provide a timing device with means for setting it for predetermined intervals from a point distant from the apparatus, and the invention consists in a timing device having certain details of construction as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein pivoted the finger 25 of the cocking link' 14 which is thereby connected with the gas- Specification of Letters Patent.

These devices are ar-- Patented Apr. 26, 1921.

Application filed August 19, 1918. Serial No. 250,437.

spring locking plate 38 which is set over the valve stem 28 and rests on a spring 39 around the valve stem and bearing upon the valve lever27 so as to force the valve plug to its seat. The valve stem may be provided with a handle 40 by which the valve may be manually operated. The valve casing is secured to' the plate 20 by screws -18 and 93.

The upper end of the cocking link 14 is formed with a slot-15 in one side of which is a notch 16 forming acocking shoulder 17 2 Projecting through this slot is a flat pin or stud 18 fixed to aplate 19 which is secured to the inner face of the front plate 20 of the casing 10 by a screw 88. As herein shown the plate 19 is formed with a notch 21 through which a screw 22 extends. A nut 23 on the screw 22 bears upon the plate to hold it in place. The cooking lever 14 is normally moved upward under-pressure of a spring 26 one end of which is fixed tothe screw 22 and the other end to a finger 24 projecting outward from .one side of the cooking lever 14. The cooking lever extends into the path of the firing cam 13 formed at the rear end of'a hub 61 which projects forward through the front plate 20 of the casing, the projecting forward'end of the hub 61 having 'a square shoulder 62 which is entered into a square opening 63 formed in furnished at its lower end with a handle 64 and at its upper end with a pointer 65 which sweeps over graduations upon a dial 66 secured to the outer face of the front the upper end of a setting lever 11 which is a plate 20 of the casing 10 by means of the screw 22 and by means of screws 67 which extend through the front plate 20 of the casing 10 into engagement with the front plate 68 of the timing mechanism, whereby boththe dial and timing mechanism are secured in place, the dial also being. secured to the front plate 20 by a screw 89, and the front plate 68 of the timing mechanism also being secured by screws 90and 91. The said hub 61 is formed with a square opening 69 for the reception of the squared forward end 70 of the winding arbor 12 which is journaled in' the front and rear plates 68 and 71 of the ordinary clock movement of any preferred construction. 'A cap nut 72,secured upon the extreme forward end of the arbor 12 holds the setting lever 11 in place upon the square shoulder 62 of the hub 61 of the firing cam 13. Loosely mounted upon the arbor 12 is a main wheel 7 3 which meshes into a pinion 74 upon the arbor 75 of the pressed against the said ratchet wheel 77 bya spring 79 encircling the.said arbor and. abutting at its outer end against a nut 80 mounted upon the threaded portion of the said arbor 12 whereby the tension of the spring 79 may be adjusted as desired, to increase or decrease the friction between the friction disk 78 and the ratchet wheel 77. The tension of the spring 79 must be sufficient' to crowd the disk 78 against the ratchet wheel 77 so as to develop the friction required to con 1e them for rotation together when the settlng lever 11 is turned counter clockwise for concurrently winding the main spring 81 of the setting and timing mechanism. In resetting the mechanism to shorten the period to which it was set and to correspondingly unwind the main spring 81, the lever 11 is turned clockwise against the friction developed by the spring 7 9-between the disk 7 8 and the ratchet wheel 77, which latter is then held against rotation by the pawl 76, while the main spring is unwound and the pointer 65 swept clockwise over the dial 66. The said spring 79 and the parts co-acting therewith, thus form means for frictionally coupling the winding arbor 12 with a member of the escapement train of the clockmovement, whereby the setting lever 11 may operate to unwind the main spring 81 after the mechanism has been initiall'yset.

Fixed to the hub 61 outside the front plate 20 is a ratchet 41, and moving in the path of this ratchet is a long pawl 42 the lower end of which is pivotally connected with the cam plate 43, which is formed with a segmental collar 44 extending'over the valve stem 28, the ends 45 and 46 of'the 40. A spring 47 tends to draw the cam plate 43 to its normal position against a sleeve 94 on the screw 48, while a spring 49 connected to one end 50 of the pawl and to the front plate 20, tends to force the pawl ,into engagement with the ratchet 41'. The

teeth on the ratchet are so proportioned'and arranged. that for each movement of the cam plate the ratchet will be moved one step so as to turn the setting lever 11 to a predetermined distance as for instance, so that the timing mechanism will run for ten minutes at the expiration of which time the firing cam 13 will move the cooking link 14 so as to move the-cocking shoulder 17 out of engagement with thestud 18 allowing the cocking link 14 to move downward .to close the valve.

Assuming that the device is used in connection with a water heater, and it is desired to have the burner turned on for ten minutes, the operator will pull a wire or chain 82 connected with a lever 83 to the limit of its movement. This lever 83 which is adjustably connected with cam plate 43 by a screw. 84 entering a hole 92 in the cam plate, will turn the cam plate 43, and the end 45 of ,the collar 44 bearing against the handle 40 will open the valve in the gas supply pipe and push the pawl 42 upward so that its upper end engaging with the ratchet 41 will move that ratchet one step forward and turn the setting lever accordingly and start the timing mechanism. By the movement of the cam lever 43 in opening the valve, the cocking link 14 is drawn downward so that the shoulder 17 engages with thefiat pin 18 by which the cocking link is locked in its down position and the valve in the pipe held in the open position. The spring 47 tends to hold the lever against the pin'18. When the cord or :chain 82 is released the cam plate 43 returns to its normal position under the action of the spring 47. At the expiration of ten minutes, or a predetermined time, the firing cam 13 on the arbor 12 will come into contact with the cocking link 14 and push it to one side so 'to have the gas turned on for twenty minutes, the cam plate 43 will be moved twice; if thirty minutes, three times, and so on. 1t will thus be seen that the timing device may be set at any predetermined interval at a point distant from the timing device itself.

Instead 'of using a pawl and. ratchet to operate the arbor 12, I may use any known form of clutch mechanism. Thus as shown in Fig. 6 of the drawings, 1 may loosely mount a cam-disk 85 on the arbor 12 in each of thenotches 86 of which I place a ball 87.. An arm 88 on the cam disk 85 will be connected by a link 95 with the cam plate 43.

- In this case the spring 49 will not be required. 83 is in position to be moved by an upward pull upon a chain 89. The partlcular advantage of the valve construction shown is the convenience of assembling the parts as it is only necessary to compress the ends of the spring plate 38 and turn it so as to turn the ends out of engagement with the notches 36 and 37 to permit the valve plug 29 to be removed from its seat.

I claim 1. In a timing device, the combination with the arbor of a time movement, of a cam operated thereby, a cocking'link arranged in the path of said cam, said link formed with a shoulder near its upper end and with a finger near its lower end, a stud with which said shoulder will engage, and a spring tending to raise the link and throw it into engagement with the said stud.

2. In a timing device, the combination with the arbor of a time movement, of a cam thereon, a cocking link arranged in the path of said cam, said link formed with a shoulder, an adjustable stud with which said shoulder will engage, means for drawing the link downward, and a spring tending to raise the link and throw it into engagement with the said stud.

3. -In a timing device, the combination with the arbor of a timing movement, ofa

cam thereon, a vertically movable cocking link arranged in the path of said cam, said link formed with a slot, a notch in said slot forming a shoulder, a stud with which said shoulder will engage, means for drawing the link downward, and a spring tending to raise the link and throw it into engagement with said stud and move the lever upward.

4. In a timing device, the combination with the arbor of a time movement, a cam, on said shaft, a cocking link in the path of said cam and adapted to be moved thereby, a valve stem connected with the lower end of the said link, a cam-plate mounted on said valve stem and adapted to move the same, a ratchet mounted on said arbor, a pawl connected with said cam-plate and adapted to turn said ratchet, and means for turning said cam-plate.

5. A timing device comprising timing mechanism, an arbor for starting the timing mechanism in operation, a cam on said arbor, a cocking link in the path of sald cam As also indicated in Fig. 6 the lever I gig and adapted to be operated at the completion of a" predetermined movement of the arbor, a valve connected with the lower end of the link and operated thereby, means for locking the link in its valve-opening position, a cam-plate mounted on the stem of said valve and adapted to turn the same, and means operated by the movement of said cam-plate for turning the arbor.

6. A timing device comprising timing mechanism, an arbor for staring the timing mechanism in operation, a cam on said arbor, a cocking link in the path of said cam and adapted to be operated at the completion of a predetermined movement of the arbor, a valve connected with the lower end of the link and operated thereby, means for locking the link in its valve-opening position, a ratchet on said arbor, a pawl in the path of said ratchet, the pawl being pivotally connected with said cam-plate, a lever connected with said cam-plate, and means for operating the said lever from a point distant from the timing mechanism.

7. In a timing device, the combination with an arbor, a cam on said arbor, a cocking link in the path of said cam and adapted to be moved thereby, a valve stem connected withthe lower end of said link, and operating mechanism attached to the'valve stem and engaging with the arbor whereby the valve is opened and the arbor set for a predetermined time by the movement of the operating mechanism.

8. In a timing device, the combination with an arbor, a cam on said arbor, a cocking link in the path of said cam and adapted to be moved thereby, a valve stem connected with the lower end of said link, op-

erating mechanism attached to the valve stem and engaging with the arbor whereby the valve is opened and the arbor set for a specification in the presence of two 'subscrib' ing witnesses.

RGSS M. G. PHILLIPS.

Witnesses:

FREDERIo C. EARLE, CLARA I). WEED.

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