US1502717A - Electric switch - Google Patents

Description

July 29, 1924. 1,502,717

I -J. H. DENNEDY ELECTRIC-SWITCH Filed June 29, 1922 2 Sheets-$heet l ll igwll'g m,

54142241101 James .34. Dennedg.

aimn x;

Patented July 2%. 1924.

FATE

mam-D Implication filed Jane 28,

To all whom it may concern:

Be it known that I, JAMne H. Diznnnm', a citizen of the United States, residing at Detroit, county of "Wayne, State of Michihave invented a certain new and useful .mprovement in ElcctricSwitches, and deerre the following to he a full, clear, and exact description of the some, such as will enable others skilled in the art togxvhich it pertains to make and use the same, reference being" had to the accompanying drawings, which form a part of this specification.

This invention relates to electric switches which may be operated either manually or automatically as desired and the object of the invention is to provide aswitch mechanism comprising a puirpf contact members of the knife type which may he quickly turned to make or break a circuit and thus '-'ent the drawing of an arc. Another of invention is to provide a swilch "inch is very simple and positive in action il in which a very slight movement of the membeis requircd to actuate the svmch. Another object of the invention is to n ride a switch in which the contact members nrc moved slowly throughout 1-. part oi their travel and through the remnindcr of the travel are moved very quickly. This quick movement of the switch members is accomplished by means of a series of levers and a spring so that when the levers are moved to a certain point by the actuating member the spring lakes efl'cct to quickly throw (he contact members to make or break the circuit. These ohjccts and the several novel features of the invention are hereinnficr more fully described and claimed and the preferred form of construction by which tl'iene objects are attained is shown in the accompanying drawings in which Fig. l is a plan view of an electric switch embodying my invention.

Fig. 2 is a. side elevation showing the switch in the closed position.

Fig. 3 is a view similar to Fig. 2 showing the switch in the open position.

Fig. 4 is a view showing lhe'switch connccted to an automatic ope 'nting device' therefor.

we. Ecrlal No. 5713231.

As shown in thc'drawings the switch comprises a base 1 on which is mounted a frame comprising side plates 2 and 3- as will be seen more particularly in Fig. 1. A shaft 4: extends through the two frame menihers 221ml 3 at one end and pivoted on the outer sides of these lrn. 'ze members on the shaft 4 is n. pair of contact members 5 each formed at the rear end with outturncd flanges (3 and T in V form and also witlr terminui upturned lugs S and f). The end it) of each contact mcmber 5 is adapted for engagement with tho respectivespring contact ll or 12 as the case may be thcrc being two mmuhcrs 5 and n (onluct member 11 or 1:2 for the respective member. A circuit consisting oi the lines if) and ll is connected with these contacts ll and 12 shown in Fig. '1 mid when the ends ll) of tho contnc mcmbcrs .3 are passed between the blndcs of: the contacts ll und ll the circuit is complclcd by passing through 21 bracket 15 connecting-the said members The levers 5 arc operated by n U shaped actuator mem be-r ll; pivotally mounted on a shall 17 exlcndim through the two frame members 2 and I} and tho'cnds of legs il of this member 16 extend between the iinnges t3 and 7 and lugs 8 and hot the members 5. The cross member of 'ihe ll conne ting, the legs thereof is provided with an aperture through which th'c end of a pin if) extends. the said pin being pivotnlly mounted at 20 on a. lever 21 which is ivotnll v mounted on the shalt l. A coiled spring extends about. the pin 19 und between the :dnuil; of the pin and the bar of the U shaped member 1o. The lever 21 is pivoted to the shaft 4 between the side'framcs, thc lever 21 being formed of two duplicate parts as will be seen from Fig. l and the head of the pin 19 extends between the adjacent ends of the two parts of the lovers 21 as will be readily understood. Near the pivot point of the lever 21 is o. shaft parts of "the lever 21 and pi'votally mounted on this shaft and extending downwardly therefrom, as shown in Fig. 2, is :1 link 24: which is pivotally connected at with a link 2@ which in turn is pivoted on e. shaft 27 mounted in the frame members. There Eilconncctmg the two are preferabiy two iinirs 26 and supported therehetween is a shaft 29 on which is pivotally mounted a threaded stud shaft. 39. The two part ieverQl above mentioned provided with an arcuate slot- 31 near the raising the pivot of the pin 19 upwurdiy and compressing the spring 22 and, as this pivot point 20 passes the center iinc of the U shaped member 16 the spring Wlli act to depress the outer end ot' the member 16 and raise the opposite ends 18 on the pivot 1?. Due i0 the lug 8 and flange 6 the ends 18 of the member 16 by engaging first sgsinst the lugs 8 begin to turn the 'memheis 5 end then engages the flanges 6 comparatively close to the pivot point of the contact members 5 which causes a quick movement of the ends 10 in engaging the contacts 2? and 28, This action of the ends 18 of the U shaped anemia-er 16 in relation to the contact Inemhers 5 is the some either in the upward oii downward movement the lugs 9 and 'i being engaged by the legs 18 on down Ward movement thereof This device may he utilized with an artificial refrigerating system in which a compressor operates in conjunction w th a cii'cuiating system having a high and low pressure side. in chi's case the device shown in Fig. i is connected to the low pressure line 32 by means of :1 coupling 33. The switch in this case controls the electric motor for operating the compressor. The switch is shown in Fig, i in the open position at which time the motor and compressor are not operating but upon a slight pressure being produced in the line 32 the shaft 34 is raised which is connected by means of a turn buckle 35 to the threaded shaft 30 of the switch ch extends through an aperture 36 provided in the switch base as shown in Fig. 1. U on upward movement of the shaft 34 the switch is thrown to the closed position shown in Fig. 2 as will be readily understood which starts the motor and compressor and as the pressure is reduced in the line 32 the coiled spring 37 forces the shaft 34 downwardly which draws the rod 30 downwardly and opens the switch as shown in Fig. 31 As this device for automatically operating the switch is applied for in another application I have merely pointed out the rincipal parts by which the switch may e autoeosmv maticailj' operated, this application losing limited to the switch structure and, as there are many devices for automatically operating a switch of this switch to only one operating device.

From the foregoing description it becomes evident that the device is very simple and eificient in operecion, will not essily get out of order, is actuated quickly and. posltively and provides a device which accomplishes the objects described.

flanges arranged in substantially V shaped form, n L? shaped actuator member pivoted at the opposite end of the frame member, the legs of the U shaped actuator extending do nos Wish to limit the use between the flanges or" thesespective contact v member, a pair of outturned iugs on each contact member, the iegs of the U sheyed actuator during movement from one position to the other being adapted to first, engage she respective iug intermediate tile end and the pivot point of the respective ieg and then engage the flange near the rivet yoint' of the contact member, and means for setustLig the said actuator.

2. In an electric switch, base, a pair of frame members mounted thereon, a Ushspod actuator pivotaliy mounted intermediste its ends at one end of the frame members, a pair of contact members actustshie by the extending ends of the ti shaped actuator, o pair of contacts .zriounted on the hose and adapted to receive the contact members, is lever pivotaily mounted at the end-of the frame opposite the actuator, the end of the said lever extending between the legs of the U shaped actuator, and between the end and pivot point thereof, a pin pivotally connected to the end of the said lever and ex tending through an apertucs provided therefor in. the end of the said actueinnn coiled spring about the said pin engggihg the end of the actuator and exerting p1;es-

sure thereagainst and means for moving ,tii

said lever on its pivot. H

3. In an'electric switch, a base of insulating material, a pair of frame members mounted thereon, a Li shaped actuator pivot ally mounted intermediate its ends tem end of the frame -members, at pair" of con tact members pivotslly mounted on the frame members at the end opposite the moan? actuator, a pair of contacts on the base for receiving the ends of the contact members, each contact member being provided with outtu zned flanges in substantially V shape between which-the legs of the U shaped actuator engage, a lever plvotally mounted between the frame members, the free end of the said lever egttending bet ven' the of the U shapedecttiator, a ,lng member pivotally connected to the can of the said lever and engaging the actuator member, and meanslimiting upward or downward movement of the said lever on its pivot, the arrangement being such that upward movemeat of the lever moves the pivot point for the spring member above the pivot oi the U shaped actuator and downward movement of the lever moves the pivot point of the spring member below the pivot of the actuator.

4. In an electric switch, a base ing material, a pair of frame members mounted thereon, a U-shaped actuator-gi ally mounted intermediate it\ ends one end of the frame members, a pair of coa tact members pivotally mounted at the on posite ends of the frame members and ac tuatable simultaneously by the legs of the U-shapedo actuator, a pair of contacts mounted on the base and adapted to receive the contact members, a lever pivotally mounted in the end of the frame members opposite the actuator, the end of the lever extending within the U shape-fl actuator and yieldablefmeans connecting the lever and actuator -\vhereby upward movement of the lever throws the actuator to close the switch and downward movement of the lever throws the actuator to open the switch.

5. In an electric switch, a base of insulating material, a contact mounted thereon. a frame member mounted on the base, a contact member pivots ly mounted on the frame member and adapted engage the contact of the base, the said contact member being provided with outturned flanges extending at an angle one to the other, an actuator member pivoted at the opposite end of the frame member having an end extending between the oi the contact member, means turning the actnator i'neinbcr on its pivot, and a of logs on the contact member between which the actuator member extends, the. actuator member engaging the respective lug the end and pivot point of the actuator during a portion of its movement and, the end of the actuator engaging th respective flange near the pivot point of the contact member during the remainder of its movement.

s. in an electric switch. the combination with cirt i having; aiteiminal. a pivoted Contact lever adapted to )6 turned to enor disengage the terminal, a pivoted of msnlatmovement of the actuator in either direction on its pivot first engages a partnearest its pivot to turn the contact lever and thereafter engages a part most distant from its pivot to finally and more rapidly turn the contact lever on its pivot.

7. in an electric svvitch,the combination with a circuit havin a terminal, a pivoted contact lever adapter to be turned to engage or disengage the terminal, a pivoted ac" tuator lever for the contact lever, said con tact lever having two parts on eachside thereof extending over opposite sides of the actuator, the arrangement being such that movement of the actuator in either direction on its pivot first engagesa part nearest its pivotto turn the contact lever and there after engages a part most distant from its pivot to finally and more rapidly turn the contact lever on its pivot, and "a spring released to action to turn the actuator before it engages the portion of the contact lever most distant from its pivot, and thereby complete movement of the contact member from its pivot.

8. Inan electric switch, the combination with a circuit having a terminal contact, a pivoted contact lever adapted to be turned to engage or disengage the contact terminal and a pivoted actuator lever 01 movement; of the contact lever, said actuator lever in its movement on it's pivot in either direction first. engaging a portion of the contact lever a point remote from its pivot to cause initial movement of the contact lever and finally to engage a portion of the contact lever point near its pivot to increase the speed or movement thereof, and a spring released to actuation of the actuator at about the time of t 'itact thereof with the point of the contact lever nearest its pivot.

9.111 switch an electric circuit, a contact lever, an actuator lever for moving the. contact lever to make or break the circult, the actuator lever being insulated from the-circuit, said contact lever beingarranged with two parts for engagement by the actuator, one of said parts being near the pivot point of the actuator and the other a distance therefrom whereby movementof the actuator, lever first; exerts comparatively great. power in movement of the contact member and then by engagement with the part distant from its pivot moves the con tact lever wi h comparatively great speed, the two levers being so arranged as to prevent the parts moving out of relationship.

10. An electric switch comprising a terminal contact, acontact lever moving to engage and disengage the terminal Contact,

an acuater iever fer waving i'ze 99mm Eaves, sai aamamr ,iaver is: sis mawsment w disengage tha coniact ievea imm the terminai contmfi, first engaging the oontat kevez' with more pawerziui ievar-ge m cause ihe iniiiai movement of the contact lever and thereafier engaging the conact Ewe? WM: 21 less pewasrfui Zeveraga m accemte size mpvpment of the lever as it finally breaks ,cpmacfia with the tetminal contact, said ac- Euaim' lever locking said contact lever in its final open positiom in testimony whreof, 1 sign this specifi cation.

JAMES H. DEHEQ EBZ.

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