US1666925A - Switch construction - Google Patents

Description

April 24, 1928.

1,666,925 R. B. BENJAMIN ET AL SWITCH CONSTRUCTION Filed NOV- 5. 1923 l 2 SheetS--Sllefzl l April 24, 1928.

1,666,925 R. B. BENJAMIN ET AL SWITCH CONSTRUCTION Filed Nov. 5, 1923 2 Sheets--Shesv 2 recesses a pair of switch mechanisms 13 and 14v 50 tending Patented Apr. 24, 1928'.

, UNITED STATES PATENT OFFICE.

REUEEN EjEENJAMIN, or CHICAGO, AND CHESTER E, WARNER, or EERWYN, ILLI- NoIs, AssIGNoRs "ro BENJAMIN ELECTRIC MEG. Co., oE CHICAGO, ILLINOIS, A

CORORATION OF ILLINOIS.

SWITCH CONSTRUCTION.

Application' n led November Our invention relates to switch construction.- l Y One of the objects of our invention is to provide a construction in which improved 5 means are provided for giving a kick off to the switch arm after the'spring has been moved past its dead center position. s A further object of lour invention isvto provide a double switch construction which l will contain few parts and will be compact 15 ous breaks in series between the switch terminals.l

Further objects will appear from the description and claims.

In the drawings in which an embodiment '80 of our invention is 'shown- Fi ure 1 is a perspective View of a double switc construction;

Fig. 2 is a bottom view of the switch;

Fig.3 isa section on line 3-3 of Fig. 2; 'l '26 Fig. 4 is a. sectional view showing one of thei switch mechanisms 'in on position;

Fig. 5 is a View similar to Fig. 4 but show ing the switch moved to off position;

Fig. 6 is a section on the line 6-6 of ig. 7 is a perspective view of a gearing member;

Fig. 911s a perspective view of the oscil` latable bridging member.

Thel switch construction shown is -designed for use in panel board -work for controlling the branch circuits although it may 4.0 obviously be used for other purposes.

. lReferring now to the fdrawin s in detail,

the double switch construction s own therein comprises a substantially rectangular insulating housing and supporting. member 45 10, having a flat upper face and a pair of 11 and Y12, in its lower surface, and

housedin said recesses respectively, and having operating switch levers 15 and 16 exabove said insulating membler for operation.

The insulating member l10 is mounted on i four metal stampings, 17, 18, l19 and 20, by

5, 1923. Serial No. 672,755.

which it is secured to any suitable support such as a panel board (not shown). Each of these stanipings is provided with an integral switch contact portion 21 and an iiitegral switch terminal portion 22.

The switch mechanism 13 comprises means for effecting four simultaneous breaks in series between the pair of switch terminals at the-left hand end ot the insulating member `10, and the switch mechanism 14 com- ;prises means for eiiecting four simultaneous breaks in series between the pair of switch terminals at the right hand end of the insulating member.

The construction of the switch mechanisms 13 'and 14` is similar lso that a description of one will suice for both. Each of these switch mechanisms comprises a metal stamping 23, having a pair of integral switch contact portions 24 and 25 and an oscillatable bridging member 26 `for simultaneously breaking the circuit at the ourjassociated contacts 21, 21, 24 and 25.

This oscillatable bridging member, as shown lin Fig. 9, comprises a pair of insulating fibrer plates or discs 27 and 28, two pairs of bridging conduct-ing strips 29, one pair secured to each of said insulating plates, and a sheet metal connecting member `for securing the two insulating plates 27 and 28' together. .This metal connecting member 30 not only serves to hold the insulating plates together, but also serves as an anchorage for one end of the lcoil tension sprin 31, 'the other end of which spring is secure to a sheet metal member 32 carried by the operating handle 15.

For, mounting the bridging member for oscillating movement a pair of bearing members 33 and 34 are provided, each having an integral pintle portion 35, which extends into the eyelet 36, which serves to hold the 'bridging strips 29 on the insulating plate;

The bearingmembers 33 and`34 are secured on the insulating member 10 in any suitable manner as by screws 37.

The operating handle 16 is oscillatably mounted on the insulating member l0 by 26, but also serves to hold the bearing pin for the bridging member after the tensionv 38in place at the bottom of the bearing i grooves.

v To properlysecure the metal connecting member 30 to the insulating plates 27 and 28, a pair ot' elongated metal washer members 4l and 42 are provided, the metal connecting member having' a plurality of inte,-

gral rivet portions 43 which extend through the insulating plates and the ends of which are `riveted vover on the metal washers.

In -order to provide a positive kick oli1 spring has been moved past the dead center, the metal member 32is provided with a pair of push iingers 44 and 45, one on each side' of the transmission spring 3l and engageable with the spring. As shown iii Fig. 4,

one of these push oii' iingers will engage to move promptly, the push oif tinger'44 engages the transmission spring 3l soon after it has passed the dead center and gives a positive kick off to the bridging member whereupon the transmission spring quickly snaps the bridgingd member to off position. I

As show ny in Fig. 4theslia-pe of the contact portion of the bridging strip 29 is vsuch lthat theeXtreme end or tip of the .strip is the last 'to break contact with the stationary -contact 25.-# l jl This construction minimizes arcing,as the tip is the part which has the quickest movement. f'

The insulating base i0 is provided wail.

an angular portion` having incline stop shoulders 46 and 47 positioned to engage the insulating discs 27 and 28 to limit the throw of the switch blades `29 and thus protect them 'from damage. I (i While we have showin but#V one vembodiment of our inventionit isv obvious that it may e .covered in other forms'covered and defined by the claims.

Having thus described our invention, what. weclaim as new and desire to secure byl Letters Patent of the United States is:

v `l. A switch construction comprising a pivoted oscillatable switch arm, a contact with which the switch arm. is engageable and s means' for oscillating said switch arm, comprising aipivoted Y oscillatable actuating.

member, a coil tension spring connecting switch arm from said contact, yafter the spring has passed the dead center. y 2. A switch construction comprising a pivoted oscillatable switch arm, a contact with Vwhich the switchfarm is engageabie and means for oscillating said switch arm, comprising a pivoted oscillatable actuating niember, a coil tension spring connecting said switch arni and oscillatable member and a pair of push fingers carried by said oscillatable member andembraciiig said spring and engageable therewith to give said switch arm a push'aftei the spring has passed a dead center.

3. A` double switch construction comprising aniiisiilating housing and supporting member, four stampings, each stamping comprising a standard for supporting said 'insulating Imember, a switch contact, and a terminal, two switch mechanisms mounted von said insulatingmember and housed thereby,- each switch mechanism comprising a pair `of contacts electrically connectedrwith each other and-means for simultaneously breaking the circuit at the cbntacts of said air vand at two of the contacts of said'stampmg, whereby eachswitch mechanism effects four .breaks in series.

4. A double switch construction compris- -l ing an insulating housing and supporting T00 member, four stampings, each stamping comprising a standardtfor supporting said insulating member, a switch contact, and a terminal, two switch mechanisms 'mountedl on said insulating member and housed thereby, each switch mechanism comprising. a

paiiof contacts electrically connected with each other ,and means for eii'ecting `i'our simultaneous breaks at vthe contacts of said pair and two of the contacts of said stamp- .ing comprising a pair'of oscillataliie conducting bridging members engageab e and disengageable with respect to said contacts. 5. double'switchl construction compris-r ing Aa rectangular insulating supporting and housing member, having a substantially flat face and a pairY of recesses in its under surface, a pair of switch mechanisms housed by said member Ain said recesses respectively, each mechanism having an operating inem-- ber accessible for operation above said insu! lating member, a pair of switch contacts adjacent one endy of said base, the circit be'- tween which is'controlledby one,` of said switch mechanisms, a pair of switch terminals. electrically connected with said contacts respectively, a second pair of` switch contacts adgacent theothervend of said insulating member, the circuit" between which is controlled by the iother switch mechanism, and a secondi` pair of switch terminalsl electri-Y iio cally connected with said second pair'of contacts respectively.

6. A double switch mechanism comprising an insulating housing and supporting member having a substantially fiat ace and a pair of recesses in its under surface, a pair of switch mechanisms lhoused by said mem-v at alllfour of said contacts to eiect four .breaks in series between said pair of switch terminals, a third pair of switch contacts adjacent the other end of 'said insulatin member, a second pair of switch termina s elec-l trically connected with said third pair of contacts respectively, and a fourth pair oi switch contacts adjacent the middle portion of said insulating member, the other switch mechanism serving to simultaneously break the circuit at said third and fourth pairs of contacts respectively, to elect fourk breaks in series between said second pair ofv switch terminals. r i

7. A switch construction comprising a pivoted oscillatable switch arm, a. contact with which the switch arm is engageable and means for oscillating said switch arm, comprising an actuating member movable back and forth, a coil tension spring connecting said switch arm and actuating member and a push member carried by said actuating member or engaging said spring to free said switch arm from said'contact, after the spring has passed the dead-center. In witness whereof, we have hereunto subscribed our names. Y

EEUBEN B. BENJAMIN.- CHESTER E. WARNEE.

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