US1762219A - Electrical contact mechanism - Google Patents

Description

June 10, 1930. r 5 FABER 1,762,219

' ELECTRICAL CONTACT MECHANISM Filed Jan. 29, 1926 7 Sheets-Sheet June ,1930. G.S.FABER 1,762,219

ELECTRI CAL C ONTACT MECHANI S1! G. S. FABER ELECTRICAL CONTACT MECHANISM June 10, 1930.

Filed Jan. 29, 1926 7 Sheets-Sheet 4 .ZEzwenZa J1me 0- Q G. s. FABER 1,762,219

I ELECTRICAL CONTACT MECHANISM Filed Jan. 29, 1926 '7 Sheets-Sheet I 5 y mam :lllllllllllllll 56 lllllnw June 10, 1930. s. s. FABE R ELECTRICAL CONTACT MECHANISM 7 Sheets-Sheet 6 Filed Jan. 29, 1926 ELECTRICAL CONTACT MECHANISM Filed Jan. 29, 1926 7 Sheets-Shet 'I LEE i y I v I i Patented June 10, 1930 U ITED STATES, PATENT OFFICE:

GUY S. FABER, OF

CHICAGO, ILLINOIS, ASSIGNOR TO JAS. P. MAB-SH 8: COMPANY, OF

CHICAGO, ILLINOIS, A CORFORATION OF ILLINOIS ELECTRICAL ooivrncr MECHANISM Application filedJanuary 29, 1926. Serial No. 84,619.

My invention relates generally to 'mechanism for controlling the making and breaking of electrical circuits, and more particularly, though not exclusively, to contact deii vices of the type comprising a receptacle for a flowable mass of current-conducting ma tcrial, as for example mercury, and a set, or sets, of contacts therein, adapted to cooperate with the circuit-controllingmercury.

One of my objects is to provide a novel, simple and reliably operating construction of snap action mechanism, especially for use in connection with contact devices of the type referred to.

Another object is to provide a snap action mechanism of such construction that a con-- tact device may be movable thereby into two or more positions surh, as for example, cir cuit-controlling positions.

Another object is to provide a construction of mechanism wherein certain of the parts which it is desired be protected, are housed;

and other objects as will-be manifest from the following descrlptionz I have chosen to illustrate my invention as embodied in a mechanism for controlling the movement of an electrical switch contact device which is adapted for movement into more than twov positions to control contacts for controlling, by way of example, valves in fuel lines, which latter, for example, may be of gas or oil lines, the mechanism being controlled responsive to variations in the temperature of the water in the boiler heated by the fuel controlled by said valves.

Referring to the accompanying drawings I Figure 1' is a face view, with certain parts sectioned, of a mechanism embodying my invention and operative to control three electrical circuits by the movement of the contact device into three positions; Figure 2 is an enlarged section taken at the irregular lines 22 on Figs. 1 and 6 and viewed in the direc- '7: L tion of the arrows. Flgure 3 1s a view like Fig. 2 ofcertain of theparts therein shown, with certain of the parts shown in elevation. Figure 4 is a section taken at the line H on Fig. 2 and viewed in the direction of the arrows. Figure 5 is a sectionta ken at the line 5 on Fig. 2 and viewed in the direction of the arrow. Figure 6 is a section taken at the line 66 on Fig. 2 and viewed in the direction of the arrows. Figure 7 is a section taken at the line 77 on Fig. 2 and viewed in the direction or" the arrows. Figure 8 is a view in sectional elevation of a pressure-actuated bellows device through the medium of which, in the particular illustrated embodiment of my invention, my improved mechanism is operated responsive to variations in temperature, this view being taken at the line 8-8 on Fig. 1 and viewed in the direction of the arrows. Figures 9 and 10 are perspective views of two relatively rotatable cooperating members through the medium of which the movements of the electrical contact device are controlled. Figure 11 is an enlarged broken plan view of the interengaging'portions of the members shown in Figs; 9 and 10 showingone of-thepositions assumed by the these parts. Figs. 11, 12, 13 and 14 are enlarged broken plan views of interengaging portions of the members shown in Figs. 9 and 10, these several views showing difierent relative positions occupied by these members in the operation of the device. Figure 15 is a sectional view taken at the line 15-15 on Fig. 5 and viewed in the direction of the arrows, show ing the construction of the illustrated contact device. Figure 16 is an enlarged view in vertical sectional elevation taken through the center set of contacts of the device of Fig. 15, this view showing the position assumed by the parts prior to the operation of closing the joint at this part of the receptacle. Figure 17 is a similar View. of these parts showing them in the position they assume upon being adjusted into tight-joint-producing condition. Figure 18 is a diagrammatic view showing the contact portions of the contact device and the valve devices controlling the supplying of fuel to the boiler in connectionwith which my improved mechanism is adapted to cooperate for controlling these valves responsive to variations in the temperature of the water in the boiler, these valvesbeing in turn controlled by said contact device; and Figure 19, a view in eleva-.

tion, partly sect1onal,of a detail of removable stop mechanism forming a part of my improved mechanism.

Referring to the particular illustrated embodiment of my invention a contact device adapted to be moved into any of three different electrical-circnit-closing positions is represented at and is shown as of the tiltable receptacle type containing sets of electrical contacts spaced apart and adapted to have the gaps therebetween closed by a mass of flowable material, as for example mercury, in the receptacle, these sets of contacts being shown at 26, 27 and 28, each set comprising two contacts insulated from each other and the mass of mercury referred to represented at 29, it being understood that when the receptacle is in the position shown in Fig. 15 the mercury will cooperate with the set of contacts 27; that when the receptacle is rocked to the dotted position shown at the left in Fig. 15. the mercury will close the circuit at the set of contacts 26, and that when this receptacle is rocked in the opposite direction to the dotted line position shown at the rightof Fig. 15, the circuit will be closed at the set 28 of contacts.

The mechanism by which the contact de vice 25 is automatically moved from one position to the other, above referred to, comprises a frame-work formed of side plates 30 and 31 rigidly connected together in parallel spaced reTation, by spacing connectors 32 and 33 and through the medium of which this framework is rigidly secured, in parallel spaced relation, to the back plate 31 of a casmg 35 housing the operating mechanism and shown as having its front wall formed of a pane of glass.

The mechanism referred to further comprises a shaft 37 journalled at its reduced end 38 in a socket 39 provided in the inner end of a nut 40 screwed into the hub portion 41 of a gear 42, this hub portion being jonrnalled in an opening 433 in the plate 31 and provlded at its inner end with a disk 44 rigid therewith.

The opposite end of the shaft 37 is enlarged to form a head 15 which extends free- ].v through an opening 16 in the plate 30, this end of the shaft 37 having journal support on a point bearing 47 provided on a bar 18 which extends freely through a transverse opening lt) in the head 15 and is rigidly secured at its ends, as by the screws 50, to the plate 30, the bearing 47 extending into a socket 51 in a wall of the opening as). The contact device is mounted on the shaft 37 at the head thereof. to move responsive to the rotation of this shaft, the device 25 to this end having a threaded laterally extending boss 52 upon which is threaded a sleeve 53 surrounding a stub shaft 54 and clamping the head portion 55 of the latter against the boss 52, with cushioning material 56 interposed therebetween, the other end of this stub shaft extending into a socket 56 in the outer end of the shaft 37 and rigidly held thereto by a set screw 57.

Surrounding the shaft 37, between its reduced portion 58 and the head 45, is a sleeve 58 which is slidable on, and rotatable relative to, this shaft. The sleeve 58 is the part through the medium of which the rocking of the head l5 and consequently the device 25, is effected to cause the mercury in the latter to close the circuit at the various sets of contacts provided therein, the means shown for thus operating this device comprising diametrically-opposed teeth 59 and 60 on one end of the sleeve 58, and diametrically- opposed sets 61 and 62 of teeth extending from one end of the head 45 of the shaft 37. The side surfaces of the tooth 59 are represented at 63 and 64 and the side surfaces of the tooth 60 are represented at 65 and 66, these various surfaces forming cannning portions cooperating with the sets 61 and 62 of the teeth as hereinafter described. Each set of teeth 61 and 62 is formed of two full teeth and two half teeth, the full teeth of the set 61 being represented at 67 and 68 and the half teeth at 69 and 70 and the full teeth of the set 62 represented at 71 and 72 and the half teeth at 73 and 74;. The side surfaces of the full teeth 67 and 68 and the side surfaces of the half teeth 69 and 70 are represented at 75, 76, 77, 78, 79 and 80, and the side surfaces of the full teeth 71 and 72 and the side surfaces of the half teeth 73 and 74 are represented at 81, 82, 83, 84, and 86, res )ectively, all of these designated surfaces constituting camming surfaces with which the teeth 59 and 60 on the sleeve 58, cooperate.

The sleeve 58 contains diametrically-opposed longitudinally extending slots 87 into which arms 88 extend, these arms being rigidly carried by, and projecting from, the hub portion 89 of a drum 90 rotatably mounted on the shaft 37. The sleeve 58 is thus connected with the drum 90 to rotate therewith, but. by reason of the provision of the slots 87 and arms 88, the sleeve 58 is adapted to move back and forth relative to this drum, a coil spring 91 surrounding the shaft 37 and a portion of the sleeve 58, and bearing at one end against a flange 92 on this sleeve, and the face of the drum 90, yieldingly forcing this sleeve to the left in Fig. into a position in which it extends at its teeth 59 and 60 in intermeshed position relative to the sets 61 and 62 of teeth.

The spring 91, and the teeth-equipped portions of the head 45 and sleeve 58, are protected by a housing formed of a cylindrical casing member 93 integral with the head 45 and extending at its outer end in overlapped position relative to an annular flange 94 on the drum 90, a dust-excluding ring 95 of packing material being confined between these overlapping surfaces.

' springis connected with a pin 99 which is carried by the disk 44 and extends into the drum 90, this spring being housed, against access of dirt thereto, by the disk 44 and drum 90 which are provided with overlapping annular portions 100 and 101 at the circumference of the drum 90, with a dust-excluding ring 102 of packing material confined thcrebetween.

The spring 96 which is provided for the purpose of yieldingly resisting the rotation of the drum 90 and sleeve 58 H1 counter-clockwise direction in Fig. 4, is adapted to be'tensioned to the degree desired, by means of a pinion 103 journalled in the plate 31 and having a. knurled operating stem 104, this pinion meshing with the gear 42, the plate 31 being provided with a pawl 106 pivoted thereto and adapted to engage the gear 105 and retain it in the position to which it is adjusted in the rotation of the pinion 103.

It may be here stated that the operation of the particular illustrated mechanism, is effected through the medium of the drum 90, as by a link 107 pivotally connected, as indicated at 108, at its upper end to the drum 90 cccentrically of its axis, and pivotally connected at its lower end, as indicated at 109, with a lever 110 rigid on a shaft 111 journailed in the side plates 30 and 31 of the casing mechanism, the force controlling the conditioning of the mechanism being applied through the lever 110 as hereinafter described.

As in the mechanism shown the rocking of the shaft 37 to the various positions occupied by it is effected by camming actions resulting from the relative rotation of the teeth on the shaft 37 and sleeve 58, respectively, it is necessary that stop means be provided for cooperation with the shaft 37 to permit of the multiple-stage movements of the shaft 37 and consequently the contact device 25, a description of these stop means being as follows: Extending radially from the head 45 is an arm 112 which terminates in a spring-pressed pin 113, and is movable be-- tween stops 116 and 117 rigid with, and extending inwardly from, the casing side 30. The pin 113 is shown as extending at its headed portion 114 into a socket 112" in the outer end of the arm 112, this pin being outwardly spring-pressed by a coil spring 113 in the socket 112, a cap 115 screwed in the outer threaded end of the arm 112 preventing displacement of the pin 113. Pivotally mounted at its rear end on a stud 118, is a lever 119 containing a notch 120 in its upper surface with the flanking surfaces ofthe lever 119 curved as shownat 121 and 122, the underside of this lever being provided with a tapering depending lug 123 located in a recess 124 in the underside of the lever 119 the adjacent surfaces of this recess at opposite sides of the lug 123 being curved as shoWnat 125 and 125.

The arm 119 cooperates, at its lug 123 with a cross-pin 126 carried by the bifurcated portion 127 of a head 128 rigidly secured to the shaft 11.1 as by the set screw 129, a leaf spring 130 rigidly secured at one end to the casing plate 30 andbearing at its curved free end against the up per surface of the lever 119 pressing the latter downwardly and maintaining it in engagement with the pin 126 at all times.

In the particular arrangement shown, the mechanism described is operated responsive to the rise and fall of temperature, as for example the temperature of water in a hot water boiler, to control the supplying of fuel to the burner of the boiler. To this end the apparatus shown comprises the device represented at 131 and which is adapted to be positioned in an opening in such a boiler to extend at its lower end into the Water, the device shown comprising a tube portion 132 screwed into an opening 133 in the side wall of the casing 34 and adapted to engage at its lower portion the threads of the opening in the boiler, a receptacle-forming member 134 open at its upper end at which it is screwed into the lower end of the member 132 and provided to extend into the water, and an expansible bellows portion 135 rigidly connected with the upper end of the tube 132 and communicating with the latter, the upper end of this bellows being provided with a head 136 terminating in anupwardly extending bifurcated portion 137 straddling the lever 110 and connected therewith, as by a pin 13S engaging this bifurcated portion and extending through any one of a plurality of openings in the lever 110. The device 131 therefore presents a closed space subjected to the heat of the water and into which any suitable highly volatile material, as for example ether, is charged, the pressure generated by the ether, responsive to rise in the temperature to which the device 131 is subjected, actuating the bellows and therefore controlling the operation of the lever 110.

In the arrangement shown the burner (not shown (of the boiler is supplied with fuel, as

for example gas or oil, through one or both pipes 139 and 140 controlled by rock valves 141 and 142, respectively, the stems of which are rigidly connected with cross-bars 143 and 144', respectively, forming armatures for cooperation with electro-magnets 145 and 146. and 147 and 148, respectively, energization of the magnets 146 and 148, which separately act upon the respective armatures 143 and 144. moving the valves 141 and 142 to open condition, and energization of the magnets 145 and 147 moving these valves to closed condition, these valves being shown in open position in Fig. 18. The set 26 of contacts comprise the two contacts 1&9 and 150 connected, respectively, with the binding posts 151 and 152; the set 27 of contacts comprise the contacts 153 and 154 connected, respectively, with the binding posts 155 and 156, and the set 28 of contacts comprise the contacts 157 and 158 connected, respectively, with the binding posts 159 and 160.

In the arrangen'ient shown the binding post 160 connects with a wire 161 leading to a wire 162 connecting together one terminal of each of the magnets 145 and 147, the other terminals of these magnets being connected together by a wire 163 which connects with a wire 164 leading by branch wires 165, 166, and 167, to the binding posts 152, 156 and 159, respectively, a source of current, shown as a battery 168, being interposed in the wire 161-. One terminal of the magnet 146 connects, by a wire 169, with the binding post 155 and its other terminal connects by a wire 176 with the wire 16%. One terminal of the magnet 14:8 connects by a wire 171 with the binding post 151, its other terminal connecting, by a wire 172, with the-wire 16a.

The valves 141 and 142 are simultaneously closed when the temperature of the boiler water, and to which the device 131 is subjected, rises to a predetermined degree, beyond which it is desired that the water not be heated. the contact device 25 under this condition being tilted in clockwise direction in Fig. to the position shown by the dotted lines at the right-hand side of this Figure. As the temperature of he water in the boiler cools the contact device is moved to the intermediate. full line, position shown in Fig. 15 in which position the gas valve 141 is caused to be opened; and in the event that the water continues to cool, the Contact device 25 rocks to the dotted line position shown at the lefthand side of Fig. 15, and the valve 142 opens, both of these valves remaining r open until the Contact device 25 rotates back to the dotted line position shown at the righthand side of Fig. 15.

Figs. 1 to 7. inclusive, 11, 15 and 18 show the parts in the position they assume when the contact device is in the intermediate position referred to, following the opening of both of the valves 11-1 and 14:2, and the rise of temperature in the boiler, responsive to thus conditioning these valves. In this position of the parts the teeth 59 and 66 extend into the valleys between the teeth 67' and 68, and 7.1 and 72, respectively. As the temperature of the water in the boiler rises, it expands the bellows 135 and through the mediinn of the lever 110 and link 107, rotates the drum 90 in counter-cloclnvise direction in Fig. 6, against the resistance of the spring 96. This tends to rotate the shaft 537 in countor-clockwise direction in Fig. 6, owing to the engagement of the camming surfaces 63 and 66 with the cam surfaces 77 and 82. However, such rotation is prevented be- .ause the act of rocking the lever 110 upwardly causes the pin 126 to ride against the lug 123 with the result of rocking the lever 119 upwardly to a position in which the pin 113 enters the notch 129. Thus continued rotation of the sleeve 58 causes it to move to the right on the shaft 37 without rotating the latter, until, the crests of the teeth 59 and 60 pass beyond the crests of the teeth 68 and 71, respectively, whereupon the cam surfaces 64 and 65 of the teeth 59 and 60, respectively, engage the cam surfaces 7 8 and 81 and under the action of the spring 91 force the sleeve 58 to the left in Fig. 2, and rotate the shaft 37, clockwise to a position in which the arm 112 engages the stop 116 in which movement the contact device 25 is rocked in clockwise direction in Fig. 15 to the dotted line position shown at the right in this figure, the lowering of the lever 119 by the disengagement of the pin 126 from the lug 123 permitting of the nioven'ient of the shaft 37 as stated.

The result of rocking the device to the position just stated is to cause the mercury 29 to flow to the right-hand end of the device, and close the circuit in which the contacts 157 and 158 are interposed. thus closing the circuits through the magnets 1 1:5 and 1-1-7, whereupon both valves 141 and lei-2 are rotated to closed position and fuel ceases to be supplied to the burner.

As the water in the boiler cools, the bet lows 135 contract, under its own elasticity, aided by the tension of the spring 96, thereby rotating the drum 96 in clockwise direction in Fig. 6. The shaft 37 being held against clockwise rotation in this figure by engagement of the arm 112 with the stop 116, the teeth 59 and 66 move at their surfaces 6% and 65 against the surfaces 78 and S1 and in such movement shiftthe sleeve 58 to the right in Fig. 2 until the extreme ends of the teeth 59 and 60 pass the crests of the teeth 68 and 71, respectively, whereupon the spring 91 forces the sleeve to the left in Fig. 2 and by the engagement of the cam surfaces 63 and 66 of the teeth 59 and 60 with the surfaces 77 and 92 of the teeth 68 and 71, rotates the shaft 37 back substantially to the intermediate position above referred to, the lever 110, in the movement of the parts as just described, swinging substantially to the position shown in Fig. 6 wherein the lever 119 is raised to the position therein shown wherein the pin 113 enters the notch 126. The moven'ient of the de ice to the position just stated causes the mercury 29 to close the circuit at the contacts 153 and 154, whereupon the magnet 146 is energized with the result of opening the valve 141 and permitting of the flow of fuel to the burner.

1 'ng that the water in the boiler continues to cool, the drum 90 is rotated still mean in further in clockwise direction .in Fig. '6 by the action of the bellows device 131, the cam surfaces 61 and 65 of the teeth '59 and 60 bearing against the cam surfaces 76 and 83 of the teeth 67 and 72. Such engagement does not, however, rotate the shaft 37 in clockwise direction inasmuch as the pin 113 is in the notch 120. Therefore, continued rotation of the drum 90 as stated operates to force the sleeve 58 to the right in Fig. 2 until opens the valve 142, whereupon the fuel flowing through the rpe 139 to the burner is augmented by the fuel flowing through the pipe 146; both of these valves remaining open until the device 25 is rocked to the reversely inclining position wherein the mercury closes the 011011111 at the contacts 157 and 158.

The movement of the device 25 from the position in which the mercury closes the circuit at the contacts 149 .and 150, to the position in which the mercury closes the circuit at the contacts 157 and 158 involves the same step operations of the toothed members as described above, but in a reversedirection. Thus the temperature of the water rises after both of the valves have been turned on as stated, the drinn 90 is rotated in counterclockwise directien in Fig. 6 and the engagement of the teeth on the sleeve 58 and shaft 37, tend to rotate the shaft 37 in thesame direction which movement, however, is prevented by the engagement of the arm 112 with the stop 117, until the teeth on the sleeve 58 ride over the teeth on the shaft 37 and with which they engage, whereupon the shaft 37 is cannned in clockwise direction in Fig. 6 to a position in which the contact device 25 is substantially in the full line position shown in F ig. 15, the lever 110 rising to the position shown wherein the lever 119 is forced to the position therein shown wherein the pin 113 enters the notch 120.. By continual rise of the temperature of the water in the boiler rotation of the drum 90 in counter-clockwise direction in Fig. 6 continues but without correspondingly rotating the shaft 37 as the pin 113 remains in the notch 120 until the crests of the teeth 59 and 60 pass over the crests of the teeth 68 and 71. As soon as the teeth on the sleeve 58 pass over the crests of the teeth 68 and 71, the latter is rotated in clockwise direction to a position in which the device 25 closes the circuit at the contacts 157 and 158, and both of the magnets 1 15 and 147 become energized with the result above exp'lai'ned.

Referring now to the particular illustrated construction of contact device 25, it is'formed of a receptacle 173 preferably of molded quartz glass preferably of the shape shown, namely of elongated, practically straight,

form, with a. recess, represented at 17 1, in its lower portion extending opposite the contacts 153 and 1541, the receptacle at its ends and midway thereofnbeing formed with tubular bosses 175., 176 and 177, respectively, in which the several sets 26, 27 and 28 of contact devices are located, the inner surfaces of these bosses tapering as indicated at 178.

Each of the sets 26, 27 and 28 of contact devices are of the same general construction and extend at their lower ends into a position in which the mercury engages therewith in the respective positions to which the receptacle 173 is rocked, as hereinbefore described, gas tight joints being provided between the sets of contact devices and the bosses 175, 176 and 177 in which they are located, by expansible sealing sleeves 17 9, 180 and 181.

Referring to the detailed showing in Figs. 16 and 17 of the set 27 of contact devices, the contact 1541 is of rod form with an opening 182 extending entirely th-erethrough lengthwise of this rod, its upper, threaded, end 183 containing a small tube 184, as for example of brass, brazed, or otherwise secured, in the enlarged upper end of the opening 182,]the rod 154 at its lower end being of enlarged diameter, as represented, with an annularly chamfered groove 185 in the top surface of this enlarged portion. The contact 154 is surrounded by the contact 153 which is of tubular form, its inn-er surface being of substantially the same contour as the outer surface of the contact 151 as shown, with a sleeve 186 of any suitable current-insulating material interposed therebetween and a washer 187 of insulating material sur.-,

rounding the threaded portion 183 of the contact 154 and engaging the top surface of the.

sleeve 186, whereby the contact 15 1 is insulated from the contact 153.

The upper end of the Contact 153 is of upwardly tapering form as shown at which portion it is surrounded by the expansible, jointsealing, sleeve 180 of any suitable material, as for example lead. The sleeve 180 which is preferably tapered internally as shown at 188, engages at its inner surface with the tapered surface of the tubular contact 153 so that when this tube is drawn upwardly in the boss 177 it will. expand the sleeve, 180 and make a tight oint between it and the boss-177 and contact 153 as shown in Fig. 17. The means shown for drawing the contact 153 to the position. stated comprises a nut 189 screwed upon thethreaded portion 183 of the contact 154; and against a washer 190 of current-insulating material which latter bears against a contact plate 191 which, in turn, bears against the upper end of the sleeve 180, it being understood that upon tightening the nut 189 the structure comprising the contacts 153 and lo t, with the interposed insulating material 186, will be forced upwardly in the sleeve 180 which latter is held down by the nut 189, thereby expanding the sleeve 180 into tight-joint-torming condition.

Owing to the action produced on the mercury by the breaking of the circuitat the cont acts, it is necessary that the air in the receptacle 173 be replaced by any desirable inert gas, or combination of gases, or a suitable liquid, as for example carbon tetrachloride, be charged into the receptacle 173 to till it and the latter thereafter sealed, and to permit any of these operations to be performed I provide the contact 154: of the hollow form shown and described and provide the tube extension lSet through which latter the receptacle 173 may be evacuated of its air content, where such is necessary or desirable, and the desired material, as for example as above stated, introduced into this receptacle, the operator, following the charging operation, merely bending the upper end of the tube 18% upon itself to close the opening therethrough and soldering the same, to seal the receptacle to the atmosphere.

The sets 26 and 28 of contact devices are the same as that just described except that they are shorter in the particular construction shown and their center contacts 150 and 158 are solid instead of hollow, it being undcrstood, however, that the center contacts of either of these sets may be hollow and titted with a tube like the tube 18%, in case it is desired that evacuation of the receptacle 173 and the charging thereof, be effected through one of the end sets of contact devices, or if desired two sets of contacts may be equipped with tubes 18%, as for example in the filling of the receptacle with liquid the liquid entering the receptacle through one tube and the air venting through the other.

It will be understood from the foregoing description that the contact device upon each operation thereof is moved by a snap action effecting desirable quick breaking of the previously established circuit.

IVhile I have illustrated my invention as incorporated in a device for moving a circuitcontrolling device of the mercury tube type movable into three positions, it will be understood that the invention may be utilized with other types of current-controlling devices and with devices movable into a number of positions other than those described, and also may be used for rocking into different positions contact-equipped ray-emitting tube devices, as for example, ultra-violet ray tubes. These as well as other modifications may be made without departing from the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is:

1. In electrical mechan sm, the combination of a member mounted to rock, a second member mounted to rotate and be moved in the direction of its length relative to said first-named member, and mechanism operating when said second member is rotated to rock said first-named member comprising cannning means formed of circumferontially arranged relatively movable cooperating projections on said mei'nbers, said projections being circumterentially separable and said means yieh'lingly forcing said second member into engagement with said first-named memher.

2. In electrical mechanism, the combination of a member mounted to rock, a second member mounted to rotate and be moved in the direction of its length relative to said iirstnamed member, and mechanisn'l operating when said second member is rotated to rock said first named member con'iprising eamming means formed 01 cireumferentially arranged relatively movable cooperating projections on said members, said projections being circumferentially separable, stops between which said first-named member is movable and means yicldingly forcing said second member into engagement with said firstnamed member.

8. In electrical mechanism, the combination of a member mounted to rock, a second member mounted to rotate and be moved in the direction of its length relative to said firstnamed member, and mechanism operating when said second member is rotated to rock said first named member con'iprising circumferentially arranged relatively movable cooperating teeth on said members, said teeth being circumterentially separable from one another and means yieldingly forcing the tooth on said second member into en ga gcmcnt with the tooth on said first-named member.

4. In electrical mechanism, the combination of a member mounted to rock. a second member mounted to rotate and be moved in the direction o't its length relative to said first-named member, and mechanism operating when said second member is rotated to rock aid first named member comprising a plurality of aligned relatively movable cooperating teeth on said members, said teeth being separable transversely from each other, stops between which said first-named member is movable and means yicldingly forcing the tooth on said second member into engagement with the tooth on said first-nai'ned member.

In electrical mechanism, the combination of a member mounted to rock, a second member mounted to rotate and be moved lengthwise relative to said first-named memher, and mechanism operatlng when said second member is rotated to rock said first named member comprising a projection on one of said members, a series of camming projections on the other of said membe "s and cooperating with said projection, stops between which said tirstnamed member is movable, a movable stop member located between said stops and movable into and out of oper ative position, means operating in timed relation to the rotation of said second member tor controlling the position of said stop memher, and means yieldingly forcing said second member into engagement with said firstnamed member.

6. In electrical mechanism the combination of a member mounted to rock, a second member mounted to rotate and be moved in the direction of its length relative to said firstnamed member, mechanism operating when said second member is rotated to rock said first-named member comprising cannning means formed of cooperating projections on said members and means yieldingly forcing said second member into engagement with said first-named member, and a spring yieldingly resisting the rotation of said second member in one direction.

7. In electrical mechanism, the combination of a member mounted to rock, a second member mounted in axial alignment with said first-named member to rotate, and be moved lengthwise, thereon, a third member rotatable with said second member and relative to which said :ond member is longitudinally movable, mechanism operating when said second member is rotated to rock said firstnauied member con'iprising camming means formed of cooperating projections on said first-named member and said second member and means yieldingly forcing said second member into engagement at its projection with the pro ection on said first-named memr her, and spring means engaging said third member and vieldingly resisting rotation of said third member in one direction.

8. In electrical mechanism, the combination of a member mounted to rock, a second member mounted in axial aligmnent with said first-named member to rotate, and be moved lengthwise, thereon, a third member mounted in axial alignment with said firs named member and rotatable with said second member and relative to which said second member is longitudinally movable, mechanism operating when said second member is rotated to rock said first-named member comprising camming means formed of cooperating projections on said first-named member and said second member and means yieldingly forcing said second member into engagement at its projection with the projection' on said first-named member, and spring means engaging said third member member mounted on said first-named memher to rotate,and be moved lengthwise, thereon, a third member mounted on said firstnamed member and rotatable with said second member and relative to which said second member is longitudinally movable, mechanism operating when said second member is rotated to rock said first-named member comprising camming means formed of cooperating projections on said first-named member and said second member, means yieldingly forcing said second member into engagement at its projection with the projection on said first-named member, and spring means engaging said third member and yieldingly resisting rotation of said third member in one direction.

10. In electrical mechanism, the combination of a member mounted to rock, a second member mounted on said iirst-named memher to rotate, and be moved lengthwise, thereon, a third member mounted on said firstnamed member and rotatable with said second member and relative to which said second member is longitudinally movable, mechanism operating when said third named memher is rotated to rock said first-named member comprising camming means formed of cooperating projections on said first-named member and said second member and means yieldingly forcing said se 011d member into engagement at its projection with the projection on said first-named member, and a spring encircling said tirst-named member id ei'igaging said third member and coopersting to yeildingly resist rotation of said third member in one direction 11. In electrical mechanism, the combination of a member mounted to rock, a second member mounted in axi al alignment with said first-named member to'rotate, and be moved lengthwise, thereon, a third member mounted in dXltll alignment with said firstnamed member and rotatable with said sec ond member and relative to which said second member islongitudinall y' movable, mechanism operating when said second member is rotated to rock said first-named member comprising camming means formed of cooperating projections on said first-named member and said second member, and means 12. In electrical mechanism, the combina i tion of a member mounted to rock, a second member mounted in axial alignment with said first-named member to rotate. and be moved lengthwise, thereon, athird member mounted in axial alignment with said tirstnamed membcand rotatable with said second member and relativeto..which said second member is longitudinally mo able, mechanism operatin when said second memher is rotated to rocK said first-named member comprising camming means formed of cooperatingprojections on said first-named member and said second member and means yieldingly forcing said second member into engagement at its projection with the projection on said first-named member, spring means engaging said third member and yield ingly resisting rotation of said third member in one direction, and a housing for said second-named means and said spring means and formed of se'tions connected with said tirstnamed member and said third member.

13. In electrical mechanism, the combination of a member mounted to rock, a second member mounted to rotate and be moved to ward and away from said first-named member, mechanism operating when said second member is rotated to rock said first-named member comprising camming means formed of cooperating projections on said members and means vicldingly forcing said second member into engagement with said tirstnamed member. and rotatable means axially aligned with said first-named member for rotating said second member.

14. In electrical mechanism, the combination of a member mounted to rock, a second member mounted to rotate and be moved toward and a a from said first-named member, and mechanism operating when said second member is rotated to rock said firstnamed member comprising a projection on one of said members, a se ies of camming projections on the other of s. 1d members and cooperating with said projection. stops be tween which said first-named member is movable. a movable stop member located between said stops and movable into and out of operative position, means operating in timed relation to the rotation of said second member for controlling the position of said stop member, and means yieldingly forcing said second member into engagement with said firstnamed member.

15. In electrical mechanism, the combination of a member mounted to rock, a second member mounted in axial alignment with said first-named member to rotate and be moved to a rd and away from said first-named member. a third member rotatable with said second member and relative to which said second member is longitudinally movable, mecha nism operating when said second member is rotated to rock said first-named member comprising cannning means formed of cooperating projections on said first-named member and said second member and means yieldingly forcing said second member into engagement at its projection with the projection on said first-named member, and spring means engaging said third member and yieldingly resisting rotation 01 said third member in one direction.

16. In electrical mechanism, the combina tion of a member mounted to rock, a second member mounted in axial alignment with said first-named member to rotate and be moved toward and away from said firstnaincd member, a third member rotatable with said second member and relative to which said second member is longitudinally movable. mechanism operating when said second member is rotated to rock said firstnamed member comprising camming means formed of cooperating projections on said tirst-nan'ied member and said second member and 3131118 yieldinglv forcing said second member into engagement at its projection with the projection on said first-named member, spring means engaging said third member and vieldingly res sting rotation of said third member i 11 one direction, and a housing for said second-nan'ied means and said spring means.

17. In electrical mechanism, the combination of a member mounted to rock, a second member mounted to rotate and be moved toward and a wa v from said first-named membe. and mechanism ope 'ating when said second member is rotated to rock said firstnamed member comprising a projection on one oi said members, a series of camming projections on the other of said members and cooperating with said projection, stops between which said first-named member is mov-- able, a movable stop member located between s2. id stops and movable into and out of operati're position. said first-named member having a portion adapted to engage with said movable stop member, means ope 'ating in timed relation to the rotation of said second member for controlling the position of said stop member. and means yieldingly forcing said second member into engagement with said ti rst-named member.

18. In electrical mechanism. the combination of amember mounted to rock, a second member mounted to rotate and be moved to ward and away from said first-named memher, and mechanism operating when said second member is rotated to rock said firstnamed member comprising a projection on one of said members, a. series of cannning projections on the other of said members and cooperating with said projection, stops bet-ween whica said first-named member is movable, a movable notched stop member located between said stops and movable into and out of operative position, said first-named member having a portion adapted to enter the notch in said movable stop member, means operating in timed relation to the rotation of said second member for controlling the position of said stop member, and means yieldingly forcingsaid second member into engagement with said first-named member.

19'. In electrical mechanism, the combination of a member mounted to rock, a second member mounted to rotate and be moved toward and away from said first-named member, and mechanism operating when said second member is rotated to rock said firstnamed member comprising a projection on one of said members, a series of camming projections on the other of said members and cooperating with said projection, stops between which said first-named member is movable, a movable notched stop member located between said stops and movable into and out of operative position, said movable stop member having receding surfaces adjoining the notch therein and said firstnamed member having a portion adapted to enter the notch in said movable stop member, means operating in timed relation to the rotation of said second member for controlling the position of said stop member, and means yieldingly forcing said second member into engagement with said first-named member.

20. In electrical mechanism, the combina tion of a member mounted to rock, a second member mounted to rotate and be moved toward and away'from said first-named member, and mechanism operating when said second member is rotated to rock said firstnamed member comprising a projection on one of said members, a series of camming projections on the other of said members and cooperating with said projection, stops between which said first-named member is movable, a movable notched stop member located between said stops and movable into and out of operative position, said first-named member having a yielding portion adapted to enter the notch in said movable stop mem ber, means operating in timed relation'to the rotation of said second member for controlling the position of said stop member, and means yieldingly forcing said second member into engagement with said first-named member.

21. In electrical mechanism, the'combination of a member mounted to rock, a second member mounted to rotate and. be moved towardand away from said first-named memher, and mechanism operating when said second member is rotated to rock said firstnamed member comprising a projection on one of said members, a series of camming projections on the other of said members and cooperatin with said projection, stops between whic said first-named member is movable, a movable notched stop member located between said stops and movable into and out of operative position, said movable stop memsaid second member for controlling the position of said stop member, and means yieldingly forcing said second member into engagement with said first-named member.

GUY S. FABER.

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