US1725560A - Switch construction - Google Patents

Description

Aug. 20, 11129.; RB. BENJAMIN Y, 1',725.,60 swITcH CONSTRUCTION v Fuga may 18, 192s lz sheets-sha 1 .-Augg 2o, 1929.

R. B. BENJAMIN SWITCH CONSTRUCTION Filed May l, 1925 3 SheetsfSheet 2 R. B. BENJAMIN Aug. 20, 929.

SWITCH CONSTRUCTION Filed May 18, 1925 5 Sheets-Sheet 3 lia/@Wwf PWM 1y 3M Z Patented Aug. 2o, 1929.

REUBEN B. BENJAMIN, 0F CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION N OIS.

PATENT OFFICE.

ELECTRIC OF ILLI- sWITcH CONSTRUCTION. Y

Application led May 18, 1925. Serial No. 30,946.

My invention relates to switch construction.

One of the objects of my invention is to provide a flat type of switch which will be suitable for use in a shallow box.

A further object of my invention is to provide a switch which will be durable and eicient. ,Further objects will appear from the description and claims.

In the drawings, in which my invention is illustrated Figure 1 is a front view showing the switch and fuses in position in a shallow box;

Fig. 2 is a section on the line 2 2 of Fig. 1;

Fi 3 'is a view simliar to Fig. 1, but showin t e switch open;

ig. 4 is a section on the line 4 4 of Fig. 1;

Figisa section on the line 5--5 of Fig. 1

Figs.' 6 and 7 are views showing the action of the switch lever and associated parts;

Figsisa section on the line 8-8 of Fig. l; Fig. 9'is asection on the line 9-9 of Fig. 1;

y 1 10 isa perspective view of the actuating slide.

Referring to the drawings in detail, the construction shown therein comprises an insulating base 1, terminal lugs 2 for the' line connections, cartridge fuses 3 between the -ftermina-ls, and a double pole, double break Yllt-switch construction for controlling the cir- Guit between the terminals.

The switch construction shown comprises a pair of switch arms 4, each pivotally mounted intermediate its ends, a reciprocable actuating slide 5 movable back and forth between the switch arms 4, a'pair of insulating links 6 pivotally connecting the slide with the switch arms respectively, a manually operable switch lever 7 oscillatable back and forth, and a tension spring 8 connecting the switch lever 7 with the actuating slide 5.

The actuating slide 5 is provided with a pair of detent and positioning rollers 9, the slide being provided with two pairs of depressions 10, one pair cooperating with each roller.

In operation, when the switch lever 7 is moved from the position shown in Fi 6 to the position shown in Fig. 7, the tenslon of the spring holds the slide 5 upwardly against the rollers 9, each of which is seated in one ofthe depressions in the slide, and the oo-ection of the spring rollers .and depressions is such that the rollers hold the slide against movement until the switch lever has been moved far enough to cause considerable spring pressure to be exerted in a direction to cause the slide to move to the' right. When the spring tensionI has accumulated sufli ciently to move the slide against the holding action of the rollers, the slide moves with a uick snap action to the position shown in ig. 7. This lateral movement of the slide necessitates a slight downward movement also to permit the slide to escape from the holding action of the rollers. When the switch lever moves from the full line position shown in Fig. 7 to the full line position shown in Fig. 6, a similar snap action of the actuating slide takes place due to the co-action between the detent rollers and the two lefthand depressions. This sna action of the slide of course indicates a quic snap action to the two switch arms 4.

Any suitable interlocking construction may be provided between the switch lever and the hinged cover 11 so that the switch cannot be closed when the cover 11 is open, or the cover opened when the switch is closed. In the construction shown, opening of the door is prevented when the switch is closed b the engagement of the switch lever 7 wit the cover 11. Similarlyfwhen the switch is open it is prevented from being closed so lon as the cover 11 is open by the engagement ofthel edge of the slot in the cover with the switch lever 7.

Each of the oscillatable switch arms comprise a pair of switch blades 12 (Figs. 8 and 9) for engagement with oppositesides, respectively, of the cooperating fixed contacts 13, a plurality of spacers 14 intermediate these switch blades 12, a pair of leaf springs 15 bearing on thefblades 12, respectively, tending to force the blades toward each other, and a pair of screws- 16 extending through the leaf springs and switch blades and threaded into nuts 17 for adjustably holding the leaf springs pressing against the switch blades. Each switch arm is oscillat ably mounted on a bushing 18 secured to the insulating base 1 by means of a screw 19 and lock-nuts 20. v

The fixed contacts 13 are provided with bevelled edges 21 to facilitate the engagement of the switch arms therewith.

Each cartridge fuse is provided with. a pair of contact clip devices, each of these contact veo pendio clip devices comprising in addition to one of the switch contact members 13 previously referred to, a U-shaped leaf spring member 22 and an L-shaped clamping member 23. The contact tip 24 of thev cartridge fuse enters between the switch contact member 13 and the leaf spring member 22 and is yieldingly and clampingly held against the fuse contact by means of the L-shaped clamping member 23 and the clamping screw 24 and nut 25.

While I have described but one embodi- Ament of my invention it is obvious that many modifications therein may occur to those skilled inthe art, and I desire, therefore, that m invention be limited only by the scope o the appended claims and by the prior art.

Having described my invention what l claim as new and desire tosecure by Letters Patent of the United States is:

1. A switch construction comprising a mounted to swin about axes perpendicular to the plane of t e base and common means for simultaneously actuating said switch arms, said common means comprising a member slidable in a general plane parallel to the plane of the base and connectlons hetween said slidable member and said switch arms, respectively.

2. A switch construction comprising a flat base and a double pole switch having a pair of switch arms which are oscillatably mounted to swing aboutV axes perpendicular to the plane of the base and common means for simultaneously actuating said switch arms, said common means ycomprising a member slidable in a general plane parallel to the plane of the base and a pair of links pivotally connecting said slidable member and said switch arms, respectively. v A

3. A switch construction comprising a flat base and a double ole switch having a pair of switch arms w ich are respectively os cillatabl mounted to swing about axes perpendicu ar to the plane of the base, common means 'for simultaneously actuating said switch arms comprisinga member movable in a, plane parallel to's'aid base, a movable p spring for actuating said member, and a releasable holding member for holding said member against movement during art of the spring movement, which when re eased, ermits a snap action of the spring andvmem er. 4. A switch construction comprising ,a Hat base and a double ole switch having a pair of switch arms w ich are respectively oscillatabl ulyar to the plane of the base and common me'ans for simultaneously actuating said -awitch arms','said common means comprisin a member shdable in a general plane paralle to the plane of the base, a manually operated mounted to swing about axes permenace sure on those portions of the movable contact f blades which engage the stationary blade, and means for adjusting the springpressure comprising a screw extending through said movable contact blades and springs at a point VVbetween the pivot-al mounting of the bla-des and end bearing portions of the leaf spring.

6. A switch construction comprising a stationary contact blade, a pivot pin, a pair of contact blades pivoted on said pivotfpin and movable as a unit, the ends of said 'igiovable blades straddling the stationary blade when the switch is in on position, and a pair of leaf springs embracing between them the pivotally mounted blades and movable therewith and exerting yielding pressure on those portions Vof the movable contact blades which engage the stationary blade` said pivotal pin extending through said leaf spring.

7.' A switch construction comprising a hat base, a pair of switch blades, respectively oscillatably mounted to swing about axes per pendicular to the plane of the hase, an operating switchlever oscillatable about an parallel to the base and transmission from' said switch lever to each of said switch blades.

8. A switch construction comprising a flatb'ase, a pair of switch arms `oscillatably mounted thereomeach switch arm being pivoted intermediate its ends, two pairs of stationary contacts, one pair for each end of the switch arm whereby each switch arm eects a double break in series, and common means for simultanenously actuating both said switch arms comprising a member slidable in a plane parallel to the plane of the base and connections between said slidable member and' p said switch arms, respectively.

9. A switch construction comprising a.' switch blade, a shiftable member having a recess therein for actuating said blade, an acy tuating member, a spring connecting said fv Y actuating member and shiftahle member and a roller detentengaging the recess in sai p y, shiftable member, said spring tending to holdv y y said shiftable member against said roller in one position of the actuating-member but actin in a direction which releases said shifta le member from said roller detent when the actuating member has been moved a predetermined amount.

10. A switch construction comprising a l l switch blade, a shi'ftable member having a recess therein for actuating said blade, an actuating member, a spring connecting said actuating member and shiftable member, and a roller detent engaging the recess in said shiftable member, said spring tending to hold said shiftable member against said roller in one position of the actuating member but acting in a direction which releases said shiftable member from said roller detent when the actuating member has been moved a predetermined amount, said actuating member engaging said shiftable member to give it a positive release if the spring action ails to release it.

11. A switch construction comprising a v switch blade, a shiftable member having a recess thereinfor actuating said blade, an

actuating member, a spring connecting said actuating member and shiftable member, and a roller detent enga 'ng the recess in said shiftable member, sai spring tending to hold said shitable member against said ro'ller in one position of the actuating member but acting in a direction which releases said shiftable member from said roller detent when the actuatin member has been moved a predeterminef amount, said actuating member enagingsa'id shiftable member to press it away Imm said roller and release it if the spring action fails to release it.

12. A switch construction comprising a pair of stationary contact blades, a pair of contact blades pivotally mounted intermediate their ends and movable as a unit so that their ends straddle said stationary blades and a pair of leaf springs straddling said movable blades and movable therewith and extending substantially7 from end to end thereof and having end bearing portions exerting yielding pressure on those portions of said movable 'blades which engage the stationary blades and means for ad]usting the spring pressure comprising lscrews extending through said movable blades and springs at points between said pivotal mounting and the said end bearing portions.

13. A switch construction comprising' a pair of stationa contact blades, a pair of contact blades pivotally mounted intermediate their ends and movable as a unit so that their ends straddle said stationary blades and a pair of'leaf springs straddling said movable blades and movable therewith and'extending substantially from` end to end thereof and having end bearing portions exertin yielding pressure on those portions'of sai movable blades which engage the stationary blades and means for adjusting the spring pressure coxlprising screws extending through said movable blades and springs at points between said pivotal mounting and the said end bearing portions and means for pivotally mounting said movable blades comprisin a pivotal pin extending through said movab e blades and s rings.

In witness whereo scribed my name.

REUBEN B. BENJAMIN.

, I have hereunto sub-

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