US940408A - Double-acting switch. - Google Patents

Description

nu' en tibilliigii' @linie-.inici onennncn Jr. seltsam/ian., on Wntieiinosa, wisconsin, assit-mon. or

, rcit/inane nl.. Nomus, or MILWAUKEE, Wisconsin.

DOUBLE-ACTING SXYTCH.

' To all 11j/tom 'it mayroncern.:

Be it known thatl, Cniiiinx'cn J. SPELL- Anui, residing in lt'auwatosa. in the county of Milwaukee and Stat'eof lilisconsin, have invented new anti useful improvements in Double-rusting Switches, of which the followingis a description., reference beinghad tothe acvcoiiipaiiying drawings, which are a part oi' this sspecitication.

'this invention has for its object to i rovide an automatic switch to he operate by a change of conditions, such as the relative buoyancy of a. vioatv when empty and when ttlleil with vater, to inove contacts into` a liquid luth to con'iplete an electrical circuit A'and :it the saine time move a liquid bath from siaitioiiaryl contacts to break an elecii'i'cal circuit. I

Another ohject of the invention to improve upon details ot' construction ot' an aiuoinatic double acting switch of this type.

with the above and other objects iii `view the invention consists in thev .automatic double acting switch herein described and claimed, its parts and (combinations of parts and all equivalents;v A

Referring to the accompanying drawings in which lilic characters of reference indicate the saine parts iii the diterent views; Figure l is a fic'nt elevation partly in section of a double acting switch constructed Iin accordance with this invention; Fig. 2 is a. sectional elevation thereof; and Fig. 3 is a plan view thereof.

In these drawings l0 indicates a base which may be of any desirable insulating material on which a receptacle il mounted, there being, u supply' pi-pe 12 for discharging a liquid, such as water. into the receptacle and an overiow 13 to prevent the liquid rising above a predetermined level therein. An open float le is supported hy the liquid l5 in the receptacle an ,is in posilift' tion to receive the liquid discharged from the supply pipe 12 so that when the liquid is admitted it serves to till the float which therefore loses its buoyancy and sinks to the bottoni of the receptacle as shown in Fig. 2.

A. stein 16 is carried hy the float M, and; has. 'mounted on its'upper enel a yoke l?. whichl may be of, metal, there being an insulating block 18 'betweexi'-the yoke and lthe stein.' The yoke. 17 embraces lthe bend oit il# y shaped glass tube 19 containingaf quantity' ci? mercury 29 or `other liquitl 'to forni acens- Speccaton of Letters ,'atent. Q lllipp'licationiied Beeember 7, 1962.

" u suction? pump ci? any 'desiiahie Serial 160.466,38@

tact bath, there being a pair oit' contact Wires 2l supported by binding posts Q2 on lthe base l0 and depending into the end oit the tube i9 to dip into the bath 20 when the 'ioat .is in its upper position. as shown in Fig. i.,v and to clear the bath when the tloat is in its .lower position as shown in Fig. 2.

Metal clips 22'are fastened to the hase 'l0 in any desirable inaniier and embrace the rear arms of a pair of l.Lshapecl glass tubes 24, there being curved strips' extending forwardly from the clipsto form concave pockets or seats' into which the tubes 25C iit to be held firmly in place. There is a quantitj.v of mercury 26 or otherliquid to-'form a contact hath iii each of the tubes '24 and stationary Contact wires 2'! mounted on bind# ingrA posts 28 of the base project into this batliin the rear arn'is of the tubes 24.-. A

norn'iaily closed and the binding posts 26- liave connecting Wires 32 leading roin'thein and constituting the 'terminals of a non mally .openA electrical circuit. The normally closed electrical circuit- 33. 'inay include a signal which will be operated upon the circuit heine` opened lor it may inciucie any operative evi'ce such as a motor for pumping Water into a.v tank from which the pipe is the overflow. Likewise the non inally lo en electrical circuit; inay inciuile 'a signa ing ineansto be operateci upon .the

tioat being lowered to give an alarm reunir? ingthepresence of an attendant to restore the parts to their norniai position enti to render such-other attention asthe a caretas with which the invention ie associ? require..

'Ehe ecnstructonfoi the means for operati? ing the switch hereinshown and .fiescriloeel issnch that. itiuay not. he restore. to itsnon,

in'a'ocnclitin after having been operated. hy .4

-tillingthe i'loat with water until the float m' raise@ and the-watertlierein is reinen-eti he will remain in its upper position and again maintain the contacts in their normal relations', with the electrical circuit 3l closed and the electrical circuit 32 open until the recurrence of the abnormal conditions which cause a flow of liquid through the pipe l2 and into the float, when the circuit 31 will be again opened and the circuit 32 closed to perform their intended functions.

The waste pipe 13 carries off all surplus liquid and maintains the predetermined level of li uid in the receptacle 11, and should the (liquidiin che receptacle 11 have its -level lowered by evaporation or through a leak, thelowering of the float will cause the operation of the respective switches to give the alarm and require the presence of an attendant who can make the necessary repairs.

Obviously the invention does not de end upon the particular means shown an described for operating the switches, as u diahraom or a tight Workin@ piston may be substituted for the float, it eing only necessary that the switch parts are automatically given the desired movement to accom lish their functions upon the occurrence ci) abnormal conditions, whether by producing a flow of liquid-or otherwise, and other varia'- tions may be made in the details of construction Without departing from, the spirit and scope of the invention.

Nhat I claim as my invention is:

1. A double acting electric switch, comprising a pair Icr stationary mercury cups, a suitably operated member carrying a third mercury cup and depending contact arms to dip within the pair of mercury cups, and stationary contacts t o dip within the third mercury cup w ien the member is moved to withdraw the contact arms from' contact with the mercury' in the pair of cu s.

2. A double acting electric switc for controlling two electric circuits, closing one circuit when it opens the other, comprising a` air of stationary mercury cups, a snitab y operated member, a U-shaped mercury cup carried by the member, stationary contacts forming terminals of an electric circuit and projecting into the ends of the U-shaped mercury tube to be connected by the inercury therein when the member is raised, a pair of contact `arms carried by the member and extending into the pair of stationary mercury cups to be dipped into the mercury thereoI- 4when the member is lowered, and contacts, making connection with the mercury in the pair of mercury cups and formingy the terminals of another electric circuit.

3. A double acting electric switch Jfor controlling two electric circuits, closingl one circuit wlien it opens the other, comprising a pair of stationary U-sliaped mercury cups, a suitably operated yoke member, a U-shaped mercury tube carried in the crotch of the yoke member, stationary contacts forming terminals of an-electric circuit and projecting into the ends of the U-shaped incrcuiy tube to be connected by the mercury therein when the yoke member is raised, a cross har mounted on the ends of the yoke member and forming depending contact arms extending into one arm of each of the stationary U- shaped mcrcury'cups to be dipped into the mercury thereof whegl the yoke member is lowered, and contact wires dipping into the mercury in the other arms of the pair of U- shaped mercury cups and forming the terminals of another electric circuit.

Ll. A double acting electric switch t'or controllin two electric circuits, closing one circuit w en it opens the other, comprising a base, spring clips thereon having curved projecting tube seats, a pair of U-shaped tubes fitting in the clips and 'on the tube seats and constituting mercury cups, a terminal wire dipping into thc mercury in one arm of cach of the mercury cups, a receptacle, means for supplying liquid to the receptacle and for drawing the liquid from the receptacle at a predetermined level, a float within the receptacle', a stem on. the Haat, a yoke member carried by the stem and insulated therefrom,

a U-shapcd mercury cup carried in the crotch of the yoke member, a cross piece mounted on the ends of the yoke member and forming depending contact arms extending into thc other ends of the pair of U-sliaped tubes and dipping into the mercury thereof when the float sinks, and a pair of contact. wires' extending. into the ends ot' the U-. haped mercury cup to be connected by the nilfrcnry therein when the float is in its up )er position and to be out of Contact. with tlic mercury when the float sinks.

A double acting electric switch, comprising a stationary mercury cup. :i suitably operated member carrying a second niercury cup and a depending Contact arm to dip within the first mercury cup` and a statioii ary contact to dip within the second nier cury cup When the member is moved to withdraw the contact arm from contact with the mercury in the first mercury cup.

. In testimony whereof, I aiiix iny signature, in presence o't two witnesses.

C. H. KEENEY, ANNA F. Soiiiimrmnnn.

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