US1377635A

US1377635A - Prepayment gas-meter

Info

Publication number: US1377635A
Application number: US105791A
Authority: US
Inventors: Smith Frederick
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-06-26
Filing date: 1916-06-26
Publication date: 1921-05-10
Anticipated expiration: 1938-05-10

Description

F. SMITH. PREPAYMENT GAS METER" APPLICATION FJLED JUNE 26. 1916.

Patented May10,1921

3 SHEETS-SHEET 1- BIC EET I/wE/v Tag .Eed erM Smzlf VF. SMITH. PREPAYMENT GAS METER. APPLICATION FILED JUNE 26, 1916.

Patented May 10,1921.

' 3 SHEEIS-SHEET 2.

mumlma ilr IEEJIIITI II llllllllllllllllll il A A A A n I 17V VENTOR Faerie] Smil 1 I TX.

F. SMITH. PREPAYMENT-[GAS M'ETER. APPLlCATION FILED JUNE 26 I916.

Patented May 10, 1921..

3 SHEETS-SHEET 3.

INVINTOIL .Eederzbk unirsn'srarns PilENT orriciz.

FREDERICK SMITH, OF DARBY, PENNSYLVANIA. V

PREPAYMENT GAS-"V! ETER.

Application filed June 26,

'1 0 all whom it may concern Be it known that I, FREDERICK SMITH, a citizen of the United States, residing at Darby, in the county of Delaware and State of Pennsylvania, have invented new and usel'ul improvements in Prepayment Gas- Meters, of which the following is a specification.

My invention relates to new and useful improvements in prepayment gas meters, and has for its object to provide'a prepayment mechanism so constructed and arranged as to prevent the fraudulent use thereof and to prevent an unscrupulous per son from obtaining gas without paying for the same.

A further object of the invention is to con-, struct a coin handling mechanism for the prepayment device, which always turns in the same direction, thereby preventing the withdrawal of the coin after the mechanism has been set to supply a certain amount of gas and also facilitating the operation of the device.

Another object of the invention is to provide means for throwing out of action the predetermining mechanism when the limit of its capacity has been reached, thereby preventing injury to the device.

A still further objectof the invention is to provide for the overthrow of the prede termining mechanisms should the gas controlled valve leak to reduce the possibility of injury to the mechanisms.

Another object of the invention is to provide means for computing a considerable amount oi gas which might pass through the meter because of a leaky valve.

A. further object of the invention is to provide a mechanism for prepayment meters for ireralculating and post-calculating the amount of used.

Other objects of the invention will be more fully brought out in the following description.

With these ends in view this invention coi st." in the details oi construction and ination of elements hereinafter set forts and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains, may under- Specification of Letters Patent.

Patented May 10, 1921.

1916. Serial No. 105,791.

stand how to make and use the same, I will describe its construction in detail, referring by numeral to the accompanying drawing forming a part of this invention, in which- Figure l, is a front elevation of the upper portion of a gas meter showing my improved pro-payment device attached thereto.

Fig.- 2, is a plan view thereof, the top wall of the meter being removed to more clearly illustrate the construction.

Flg. 3, is a side elevation thereof, a portion of the valve housing and a portion of the casing of the prepayment device being broken away to show the connection between the valve and the prepayment device.

Fig. at, is a side elevation of the meter havmg the pre-payment device removed.

Fig. 5, is an enlarged plan view or the sleeve and connecting dog which connects the predeterniining mechanism with the valve and which provides for the overthrow of said predetermining mechanism.

Fig. 6, is a face View thereof.

Fig. 7, is a section at the line 7-7 of Fig. 6, looking in the direction of the arrow.

Fig. 8, is an enlarged side elevation of the pre-payment device, its cover or closure being removed to illustrate the interior construction.

Fig. 9, is a section Fig. 8.

Fig. 10, is a section at the line 10-10 of Fig. 8 looking in the direction of the arrow.

Fig. 11, is a section at the line 11l1 of Fig. 9 looking in the direction of the arrow.

Fig. 12, is a similar View showing the coin handling mechanism turned to a different position and having the indicator removed.

Fig/13, is a section on the line 1313 of Fig. 8 of the upper portion of the pre-payat the line 99 of ment device, looking in the direction of the arrow.

Fig. 14:, is a section on the line 14-1d of Fig. 1.3,.looking in the direction of the arrow, having parts of the mechanism and easing broken away and showing the position of the coin drawer with relation to the chute and coin handling mechanism.

Fig. 15, is a side elevation of the coin handling mechanism,

Fig. 16, is a similar view at approximately right angles thereto,

Fig. 17, is a section at the line 17-17 of Fig. 15, looking in the direction of the arrow.

Fig. 18, is a section at the line 1818 of Fig. 16, looking in the direction of the arrow; and

Fig. 19, is an enlarged sectional view of the predetermining mechanism showing the manner in which it is connected to its shaft.

In carrying out my invention as here embodied 2 represents a gas meter having an inlet pipe 3 and an outlet pine 4: and provided with the ordinary diaphragm (not shown), which transmits power and motion to the diaphragm shafts 5, these being connected by the oint levers 6 with the crank 7 mounted upon the shaft 8, the latter carrying a worm gear 9, which latter meshes with a gear 10 mounted on the indicator shaft 11, which is connected with the train of gears of the indicator or register, whereby the amount of gas used or passed through the meter is registered, or indicated upon the dials 13.

()n the indicator shaft 11 is mounted the worm gear 14 which meshes with the gear 15 carried by the transfer shaft 16, said shaft being formed of two

parts

17 and 18, the latter telescoping with the former, the parts being held in their adjusted positions by the set screw 19. Gne end of this shaft 16 is journaled in the bracket 20, and the other end is connected with the rate wheel shaft 21 in any suitable manner, said connection here shown as comprising a pin 22 passing through the end of the member 17 of the shaft 16, said pin registering with notches 23 in the socket 24- which is loosely connected with the projecting end of the rate wheel shaft 21.

The inlet pipe 3 is provided with a valve casing 25 in which is situated the valve seat 26 having a valve 27 coacting therewith, the latter being pivoted by the stem 28 to the arm 29'at 30, said arm 29 passing through an opening 31 in the valve :asing and projecting into the housing 32 carried by the valve casing and in which is jourualed the shaft 33, said shaft being properly packed toprevent the escape of gas. 7

The foregoing description relates to a meter of ordinary construction, and describes the parts to which my improved prepayment device is attached, but does not relate to my invention as my device may be attached to any meter having similar parts. 7 34 represents the casing of my prepayment device comprising a side wall 35 having holes 36 therein to register with the pins 37 on the meter, a rear wall 38, a front wall 39 and top and

bottom walls

40 and 41 respectively, the open side of the casing being normally closed by the cover 42,

In the casing is formed an opening l3 which extends partly into the side wall 35 and partly in the rear wall 38, and through this opening projects the housing 32 when the casing is applied to the meter, and at the same time the trunnion 442 permanently carried by the casing projects through an opening 15 in the side walls 35 of the meter, and on this trunnion is threaded the nut i6, thereby properly holding the casing in position, and said nut is held againstaccidental displacement by the lock nut 17.

The rate wheel shaft 21 is journaled in the trunnion 4a, and the inner end of said shaft 21 is supported by the supporting arm 146 loosely pivoted upon the stationary rod 147, said supporting arm 146 being provided with a notch 148 adapted to register with the shaft 21. ()n the square portion of the shaft 21 is removably mounted the rate wheel 49, which is in the form of a gear and meshes with the gear 50 journaled upon the shaft 51 carried by the depending angular support 52 pivoted to the shaft 53 and provided with a slot 5a which registers with the rod 147. Said support 52 and the supporting arm 146 are each held in their adjusted positions by means of a thumb nut 55 or its equivalent threaded upon the rod 147 and having a spacing menber such as a washer 56 interposed between said support and the supporting arm.

The gear 50 carries a pinion 57 which meshes with the gear 58 mounted on the shaft 5 3 from which depends the support 52. The gear 58 carries an intermittent or one toothed pinion 59 adapted to mesh with the intermittent gear 60, which is j ournaled on the shaft 61, said shaft being mounted in one of the walls of the casing and having its free or inner end supported by a supporti g arm or strap 62 carried by the sl aft The intermittent gear 60 is provided wit an extra long hub or bearing 63, and tlii. carries a pinion 64; which coacts with the predetermining mechanism, or in other words meshes with the double spiral or worm 65 having a single flange 66 at one end and a double flange 67 atthe opposite end, the latter forming a groove 63 for a purpose to be hereinafter described.

The predetermining mechanism which comprises the double worm 65. the single 7 flange 66 and the double flange 67 is mounted upon. a shaft 69 journaled in the brackets 70 secured to the side wall 35 of the casing. The shaft 69 is provided a portion of its length with corrugations 71, said corru tions terminating some distance from one end of the shaft to form the blank space 72 of the same diameter as the deepest por tions of the corrugations.

In order that the shaft 69 and the predetermining mechanism may be revolved simultaneously I provide a pin 73 (Fig. 19) which is carried by the spiral and projects The coin handling mechanism is plainly illustrated in Figs. 13 to 18 inclusive in which 75 denotes the body having a coin pocket or cavity 76 therein provided with a mouth 77 acting one time as the inlet and another time as the outlet.

The body is also provided with a transverse arcuate notch 78 which communicates with the coin pocket pocket 76 and also with the groove 79 formed around a portion of the periphery of the body adjacent one face thereof and at the opposite end of said groove is formed an openingSO which com municates therewith and acts as the inlet to said groove. The edge 81 or the wall of the notch 7 8 opposite the end of the groove 79 acts as a stop and is adaptedto contact with a pin 82v carried by the housing 83 of the coin handling mechanism and project- 'ing from the inner face thereof. bard pin 82 registers with the slot 7 9 at certain times and at other times'projects into the space 84- between the face of the body and. the front wall of the housing, and in order that the rotation of the coin handling mechanism may be stopped, when the pin 82 is out of registration with the groove 79, I provide a stop 85 which is carried by the body and projects from the face thereof as plainly shown in Fig. 15.

The coin handling mechanism is revolved by the shaft 86 which passes through the front wall of the housing 83, and has mounted thereon the handle 87. From the housing of the coin handling mechanism runs a coin chute 88 which terminates a short distance above the money drawer 89 in the bot- ,tom of the casing, said drawer passing through an opening 90 in the front wall of said casing.

In the upper portion of the housing 83 is formed a coin slot Qland the lower portion of said housing terminates short of the front wall of the casing and beyond this is situated the bridge 92 thereby forming a coin slot 93 which leads to the coin chute 88.

The body 75 of the coin handling mechanism carries a ratchet gear 94: 12) with which ceacts the pawl 95 pivoted as at to the bridge 92, thereby preventing the coin handling mechanism from. being turned except in one direction as shown by the arrow on Fig. 12, and on the ratchet gear is pivoted a dog 9? as at 98 which is provided with a pin 99' on the side of the pivot point opposite the nose of said dog, and

this pin works in the arcuate notch T 8 and is adapted at certain times tolie across a portion of the coin pocket 76.

When a coin is placed in the coin pocket 76, said coin will engage the pin 99, forcing the same outward, thus operating the dog 97, causing the nose thereof to engage the ratchet pinion 190 which is carried by the shaft 69 and securely a tached thereto.

The operation of the coin handling mechanism is as follows Presuming the coin opening 77 is adjacentthe coin slot 9f the handle 87 is turned in the direction of the arrow shown on Fig. 12 7 until said coin opening '77 in the body T5 is in alinenient with the coin slot 91 in the housing 83, at which time a coin may be inserted in the coin pocket 76. When the coin has beenplaced in the coin pocket the pin 99 on the dog 97 will be forced outwardly, causing the nose of said dog to engage the ratchet pinion 100 on the shaft 69.

The entire coin handling mechanism is then moved inward by sliding the same within its housing 83, until the body 7-5 passes beyond the pin 82, at which time the coin handling mechanism may be rotated in the direction shown by the arrow on Fig. 12 until the stop 85 contactswith the pin 82, at which time the coin slot 7'? will be at the bottom of the device and partially or wholly covered by the bridge 92 to prevent the coin dropping from the coin pocket.

During the rotation of the coin handling mechanism the dog 97 is in contact with the ratchet pinion 100 as shown by dotted lines in Fig. 11, which will cause the rotation. of the shaft 69 and likewise the double spiral. As the spiral is inmesh with the gear 6 f, which is held against rotation because of the intermittent gear being locked, each rotation will cause the double spiral to move forward along the shaft 69 or toward the coin handlingmechanism, thereby predetermining the amount of gas to be used. lVhen the parts are in this position the opening 80 in the edge of the body registers with the pin 82 on the housing 83. The coin handling mechanism is moved outward or toward the front face of the housing 83, :ausing the pin 82 to enter the opening 80, until it is in alinement with the groove '1), which action will bring the coin slot '77 in the body 75 in alineinent with the coin slot 98, permitting said coin to fall from the coin pocket and pass through the coin slot 93 into the coin chute '88. where it will slide downward and fall into the coin drawer 89.

After the coin hasfallen from the coin pocket '76, the coin handling mechanism may be rotated further in the same direction, without affecting the worm 65, forv the stop pin 101 carried by the casing which is in the path of travel of a portion of the dog 97 will force the tail end of said dog inward, causing the nose thereof to be disengaged from the ratchet pinion 100.

The tail of the dog 97 can be forced inward, because as before stated the coin has dropped from the coin pocket, and there is nothing in contact with the 'pin 99 to prevent the inward movement of the tail end of said dog.

The continued rotation of the coin handling mechanism will bring the edge 81 of the notch 78 into contact with the pin 82 and stop the further rotation of said coin handling mechanism, and when in this position, the coin slot 77 is at the top of the device and in alinement with the coin slot 91 and another coin may be inserted. During this further rotation of the coin handling mechanism, the dog 97 being out of engagement with the ratchet pinion 100, the shaft 69 will not be revolved. The nose of the dog is of such shape that should it engage the ratchet pinion 100 when there is no coin in the coin pocket, said dog will ride over the teeth of said ratchet pinion, and the pawl 95 always being in engagement with the ratchet gear 94, will prevent any reverse movement of the coin handling mechanism.

On the shaft 69 preferably between the ratchet pinion 100 and the forward bracket is loosely mounted or journaled the bell crank lever 102, one end of which acts as a pointer 108 protected by the shield 104, and the other end has connected thereto a link or wire 105, which is connected with one of the arms of the bell crank lever 106 pivoted to the casing as at 107, the opposite arm of the last named bell crank lever having a pin 108 which registers with the groove 68 between the double flange 67.

As the double spiral 65 is moved along the shaft 69, the pin 108 will be moved to operate the bell crank lever 106, which through the medium of the wire or link 105 will operate the bell crank lever 102, causing the pointer 103 formed from a portion thereof to indicate through an opening 109 in the front end of the casing the relative position of the predetermined mechanism, thus indicating how many coins have been placed in the device, when the capacity of the device is reached and when another coin should be placed therein.

On the shaft 33 is mounted the sleeve 110, the same being held in its proper posi tion and adjustment by the set screw 111. The sleeve is provided. with a flange 112, and a segmental flange 118, between which is rotatably mounted the connecting dog 114 having a stop 115 to engage the straight edge 116 of the segmental flange and limit the movement of the dog, said, stop 115 being normally held in engagement with said straight edge 116 by the spring 117, one end of which is secured to the dog as at 118, and the other end to the sleeve as at 119.

The dog 114 is also provided with a notch 120, which is arranged to register with the flange 66 during certain positions of the predetermining mechanism or the double spiral 65.

Supposing the controlling valve 27 to be closed upon its seat 26, and the other parts in their relative positions as shown in Fig. 3, then to open the controlling valve the operation is as follows A coin is placed in the coin handling mechanism and the latter operated to move the double spiral 65 forwardly along its shaft 69, which action will rotate the connecting dog 114 through the medium of the flange 66, thus rotating the shaft 38 and removing the controlling valve 27 from its seat, permitting a flow of gas through the meter. As the gas flows through the meter the diaphragm will be operated, thereby revolving the shafts 5 and motion will be transmitted from said shafts through the joint levers 6, crank 7, shaft 8, worm 9, gear 10, shaft 11, worm 14, gear 15, shaft 16, to the rate wheel shaft 21, then through the rate wheel or gear 49, the gear 50 meshing therewith, the pinions 57 and the gear 58 meshing therewith, which after one complete revolution will cause the single toothed or intermittent pinion 59 to rotate the intermlttent gear 60, a portion of a revolution, and through the medium of the pinion 64 will transmit motion to the double spiral 65 to move the same rearwardly along its shaft 69, and when the entire amount of gas paid for is delivered, said spiral will be moved a sufficient distance to cause the flange 66 to again enter the notch 120 in the connecting dog 1145, thereby rotating said connecting dog, and the shaft 36 on which it is mounted and closing the valve 27 upon its seat.

Should the controlling valve 27 leak from any cause whatever, the gas which passes the said valve will pass through the meter to the burners and the mechanism will be operated so that the double spiral 65 will be moved rearwardly along its shaft 69 until the flange 66 acts upon the connecting dog 114 and causes said dog to rotate about its sleeve 110 against the action of the spring 117 thereby permitting a considerable movement of the parts without disengaging or breaking any member of the meter or prepayment mechanism. When the pressure of the spiral 65 upon the dog 114 is relieved by the insertion of the necessary number of coins, said dog will be returned to its nor mal position by said spring 117, when the stop 115 will coact with the straight edge 116 of the segmental flange 113 and thereafter the connecting dog 114, the sleeve 110 and the shaft 33 will rotate in unison.

The amount of gas that will pass through a meter from a leaky valve is relatively small, and might furnish sufiicient fuel for a single light, but as soon as a second light is lighted, both of the lights will decrease in volume, indicating to the user that it is necessary to place another coin in the device.

When. because of any leak in the controlling valve the mechanism of the device has been moved to the position above described, or in other words shouldthe predetermining mechanism be overthrown and the connecting dog 114 rotated against the action of the spring 117, and independent of the shaft 33 beyond its normal position, the same being termed the zero position, to the negative side of the Zero position, and a coin is then inserted in the device, the predetermining mechanism will bemoved forward a predetermined distance, and if that part of gas used is equal to the amount that can be purchased for the first coin, then the insertion of said coin will move the predetermining mechanism to the point which will permit the connecting dog 114 to re turn to the zero position, but will not open the controlling valve. Thus the device has post-calculated the amountof gas used, and itis necessary to insert an additional coin before the controlling valve will. be opened. When the additional coin is placed in the device the predetermining mechanism will be moved farther forwardly, and will rotate the connecting dog 114 to the positive side of the zero position, causing the pre determining mechanism'to pre-calculate the amount of. gas used.

For an example, we will presume that 1t takes five revolutions of the rate wheel 49 to cause the intermittent gear 60 to move one step, then when sufficient gas has been used to produce five revolutions of the rate wheel or gear 49, the entire train of gears will be operated to move the double spiral G5 rearwardly, the same distance it was moved forward when a coin was inserted in the coin handling mechanism.

If one coin is inserted in the device, the double spiral 65 is moved a predetermining distance along its shaft 69, thus opening the controlling valve and permitting a flow of gas through the meter. As the gas 1s used, the rate wheel or gear 49 is revolved, thereby revolving the gear 50, the pin on 57, the gear 58 and the intermittent pinion 59, which gradually changes the position of the single tooth on the intermittent pinion, in this manner calculating the amount of gas to be used, and should half of the amount of gas called for by the insertion of the coin in the device he used, then the single tooth on the intermittent pinion Wlll 60, thus moving the same one step, which through the medium of the pinion 64 will move the spiral 65 backward one of the predetermining distances, and the continued use of gas will operate the train of gears in the manner just described, until the spiral 65 is moved backward an additional predetermining distance which will close the controlling valve.

From this description it will be noted that although the amount of gas called for by the insertion of one coin in the device has not been entirely used, and another coin is placed therein, it does not affect the amount of gas called for by the insertion of the first coin, and the entire amount which the user has paid for will pass through the meter.

Should more coins than the predetermining mechanism will register be placed in the coin handling mechanism the worm 65 will be moved along the shaft 69 until the pin 73 is disengaged from the corrugations 71 and alines with the blank space 72 at which time the shaft 69 may be revolved indefinitely without transmitting motion to the worm or other parts of the mechanism so that the parts cannot be injured by placing too many coins therein.

The cover 42 is provided with a catch 121 at its upper end, which is adapted to contact with and overlaps the lug 122 depend ing from the top wall 40 of the casing, and said cover is further provided intermediate its ends with headed lugs or catches 123 which are engaged by a pivoted latch 124, one end being pivoted at 125 to the casing, and the free end (which rises and is brought into contact with the catches 123) being arranged to engage the keeper 1% carried by the rear wall of the casing. The said pivoted latch is raised to the horizontal position by the money drawer 89 when the latter is placed in the casing, and as the upper edge of said drawer is in constant engage' ment with the latch it is impossible to accidentally displace said latch, thus preventing the opening of the casing until the money drawer is withdrawn, and then it is to be understood it is locked in the casings n any suitable manner.

It is to be noted that I have produced a pie-payment device which will permit the delivery of the entire amount of gas to the consumer that has been paid for, and which cannot be injured by placing coins in the kil device after its capacity has been reached, and which will permit a considerable amount of gas to flow through the meter without injury thereto after the gas paid for has been used.

Of course I do not wish to be limited to the exact details of construction as here shown, as these may be varied within the limits of the appended claims without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful, is

1. The combination with a meter having a diaphragm operated mechanism and rovided with a valve, of a shaft to which said valve is connected, a sleeve mounted on the shaft, a connecting dog journaled on said sleeve, means for permitting a movement of said dog independent of the sleeve and a predetermining mechanism coacting with said connecting dog to open or close the valve.

2. The combination with a meter having a diaphragm operated mechanism and provided with a valve, of a shaft to which said valve is connected, a sleeve mounted on the shaft, a connecting dog journaled on said sleeve, means for permitting a movement of said dog independent of the sleeve, a predetermining mechanism coacting with said connecting dog to open or close the Valve, and means for operating said predetermining mechanism to move the same a predetermined distance and open the valve.

3. The combination with a meter having a diaphragm operated mechanism and provided with a valve, of a shaft to which said valve is connected, a sleeve mounted on the shaft, a connecting dog journaled on said sleeve, means for permitting a movement of said dog independent of the sleeve, a predetermining mechanism coacting with said connecting dog to open or close the valve, means for operating said predetermining mechanism to move the same a predetermined distance and open the valve, and means for moving said predetermining mechanism in the reverse direction, said predetermined distance, to close the valve.

1. The combination with a meter having a diaphragm operated mechanism and provided with a valve, of a shaft to which said valve is connected, a sleeve mounted on the shaft, a connecting dog journaled on said sleeve, means for permitting a movement of said dog independent of the sleeve, a predetermining mechanism coacting with said connecting dog to open or close the valve, means for operating" said predetermining mechanism to move the same a predetermined distance and open the valve, and a train of gearing coacting with the redetermining mechanism and controlled by the meter mechanism for moving said predetermining mechanism in a reverse direction said predetermined distance to close the valve.

5. The sleeve carrying a flange and a segmental flange spaced apart, a dog journaled on said sleeve between said flanges, means carried by the dog for limiting the movement thereof in one direction, and means for normally holding said dog in its limited position.

6. The sleeve carrying a flange and a segmental flange spaced apart, a dog journaled on said sleeve between said flanges, a stop carried by the dog and adapted to coact with the segmental flange to limit the movement of said dog in one direction, and means for holding said dog in that position which will put the stop in contact with the segmental flange.

7. The sleeve carrying a flange and a segmental flange spaced apart, a dog journaled on said sleeve between said flanges, a stop carried by the dog and adapted to coact with the segmental flange to limit the movement of said dog in one direction, and a spring connected to the sleeve and to the dog for holding the stop carried by said dog normally in contact with the segmental flange.

8. In a device of the character stated a shaft corrugated throughout the major portion thereof, a predetermining mechanism slidable on said shaft and means carried by the predetermining mechanism adapted to engage the corrugations for causing said mechanism to revolve with the shaft, said shaft adapted to revolve independently of said mechanism when the latter has moved a-suflicient distance to cause said means to be disengaged from the corrugations.

9. In a device of the character stated a predetermining mechanism, a shaft on which said mechanism is mounted, said shaft being corrugated throughout the major portion of its length, and adapted to coact with means carried by the predetermining mechanism for causing said mechanism to revolve with the shaft, said shaft adapted to revolve independently of said mechanism when said means is disengaged from the corrugations.

10. In a device of the character stated a shaft having a corrugated portion and a plain portion, a predetermining mechanism slidably mounted thereon and. means carried by said mechanism for putting the latter in and out of mesh with the corrugations.

11. In a device of the character stated, a worm capable of a revolving and sliding movement, a rotating sleeve, a segmental flange carried thereby, a valve actuated by said sleeve, a dog with which the worm coacts, journaled on said sleeve, a stop on said dog to engage the segmental flange to limit the rotable'movement of the dog about the sleeve, said worm, when in engagement with the dog and sliding in one direction, rotating the dog independently of the sleeve, said dog returning to its normal position with the stop in engagement with the segmental flange when the worm is moved in the opposite direction after which a further movement of the worm will rotate the sleeve through the medium of the dog to open the 10 valve.

In testimony whereof, I have hereunto affixed my signature in the presence of two subscribing witnesses.

FREDERICK SMITH.

Witnesses:

H. HoBDnLL,

CHAs. Sonnonnn.