Electrical mixer-knife

Claim 2

In a power driven appliance having two cutting knives supported in face-to-face sliding relationship extending from a housing wIth their shank portions disposed within the housing, two parallel carriers reciprocably mounted in said housing and releasably supporting said shank portions, each shank having a notch on the lower edge, detent means carried by said carriers spring biased to releasably engage in the respective ones of said notches to secure the knives in drive relationship to the carriers, power means in said housing to reciprocate said carriers and the knives in opposite directions with respect to each other, electrical switch means in said housing having a control button extending through the wall of the housing for manual movement to energize the power means in its ''''ON'''' position and having a substantial lost motion movement in its ''''OFF'''' position, and means actuated by said control button during said lost motion movement to displace said detent means and release said shank portions.

Claim 3

The combination called for in claim 1 in which said detent means comprises a horizontal pin on each carrier received in said notch, each shank portion having a terminal cam portion deflecting said pin for movement of the shank notch into registry with said pin, and spring means carried by said carrier stressed by the shank portion to engage and urge said control button into its ''''OFF'''' position.

Claim 4

The combination called for in claim 1 in which said switch includes an electrical contact engaged by said contact blade in its ''''OFF'''' position, and a second manually controlled switch means is provided having a movable contact engaging said electrical contact in its ''''ON'''' position, and spring means urging said second manually controlled switch means to its ''''OFF'''' position.

Claim 5

In a power drive appliance having a housing, a pair of parallel carriers slidably mounted in said housing for relative parallel movement longitudinally in said housing, power means in said housing to reciprocate said carriers in opposite directions, said carriers releasably receiving the shanks of knives in driven relationship, switch means in said housing to energize the power means to reciprocate the carriers, resilient means carried by one of said carriers biased by the shank in its operative position and carried thereby to actuate the switch means and urge it to its ''''OFF'''' position, a second switch means connected in parallel with the first switch means, and manual means for actuating said second switch means to close said second switch means when said first switch means is ''''OFF.''''

Claim 6

In a power drive appliance having a housing, a pair of parallel carriers slidably mounted in said housing for relative parallel movement longitudinally in said housing, power means in said housing to reciprocate said carriers in opposite directions, said carriers releasably receiving the shanks of knives in driven relationship, switch means in said housing to energize the power means to reciprocate the carriers, resilient means carried by one of said carriers biased by the shank in its operative position and carried thereby to actuate the switch means and urge it to its ''''OFF'''' position, a second switch means connected in parallel with the first switch means, and manual means for actuating said second switch means to close said second switch means when said first switch means is ''''OFF.''''

Claim 7

In an electrically operated kitchen appliance having a housing horizontally disposed in use and a motor driven worm gear in the forward end thereof, a vertically disposed worm wheel engaging said worm gear and journaled for rotation about a predetermined axis, a pair of diametrically spaced crank elements extending from opposite sides of the worm wheel and parallel to said axis, a pair of carriers slidably mounted within said forward end of the housing on opposite sides of the plane of said worm wheel of said housing, means carried by said carriers engaging said crank elements to reciprocate said carriers in opposite directions simultaneously, said carriers receiving the shanks of cutter knives and having laterally opening notches which are coincident with laterally opening notches on the shanks when the shanks are in operative position, resilient detent latch means releasably received in said coinciding notches in interlocking drive relationship, switch means within said housing for controlling the speed of said worm gear and having a control button extending through the wall of the housing for manual reciprocation with a substantial amount of lost motion movement in its ''''OFF'''' position, and means actuated by said control button during said lost motion movement to retract said detent latch means from said interlocking relationship.

Claim 8

In an electrically operated kitchen appliance having a housing horizontally disposed in use and a motor driven worm gear in the forward end thereof, a vertically disposed worm wheel engaging said worm gear and journaled for rotation about a predetermined axis, a pair of diametrically spaced crank elements extending from opposite sides of the worm wheel and parallel to said axis, a pair of carriers slidably mounted within said forward end of the housing on opposite sides of the plane of said worm wheel of said housing, means carried by said carriers engaging said crank elements to reciprocate said carriers in opposite directions simultaneously, said carriers receiving the shanks of cutter knives and having laterally opening notches which are coincident with laterally opening notches on the shanks when the shanks are in operative position, resilient detent latch means releasably received in said coinciding notches in interlocking drive relationship, switch means within said housing for controlling the speed of said worm gear and having a control button extending through the wall of the housing for manual reciprocation with a substantial amount of lost motion movement in its ''''OFF'''' position, and means actuated by said control button during said lost motion movement to retract said detent latch means from said interlocking relationship.

Claim 9

In a power driven appliance having a housing, a pair of parallel carriers slidably mounted in said housing for relative parallel movement longitudinally in said housing, power means in said housing to reciprocate said carriers in opposite directions, said carriers releasably receiving the shanks of knives in driven relationship, first switch means in said housing having a control button manually reciprocable to energize the power means and having a substantial lost motion in its hi-speed position, a normally closed second switch means connected in series with said first switch means and power means, resilient means carried by one of said carriers biased by the shank when disposed in its operative position and carried thereby to engage the second switch means and urge it to its ''''OFF'''' position, and a normally open third switch means connected in parallel with said second switch means moved to its closed position by said control button during its lost motion movement.

Claim 10

In a power driven appliance having a housing, a pair of parallel carriers slidably mounted in said housing for relative parallel movement longitudinally in said housing, power means in said housing to reciprocate said carriers in opposite directions, said carriers releasably receiving the shanks of knives in driven relationship, first switch means in said housing having a control button manually reciprocable to energize the power means and having a substantial lost motion in its hi-speed position, a normally closed second switch means connected in series with said first switch means and power means, resilient means carried by one of said carriers biased by the shank when disposed in its operative position and carried thereby to engage the second switch means and urge it to its ''''OFF'''' position, and a normally open third switch means connected in parallel with said second switch means moved to its closed position by said control button during its lost motion movement.

Claim 11

The combination called for in claim 6 in which said control button has substantial lost motion in its ''''OFF'''' position, and means actuated by said control button during its lost motion movement to release the shank from said one carrier and from engagement with said resilient means.

Claim 12

In a power driven appliance having a housing, a pair of parallel carriers slidably mounted in said housing for relative parallel movement longitudinally in said housing, power means in said housing to reciprocate said carriers in opposite directions, said carriers releasably receiving the shanks of knives in driven relationship, first switch means in said housing having a control button manually reciprocable to energize the power means and having a substantial lost motion in an ''''ON'''' position, a normally open second switch means connected in series with said first switch means, and means actuated by said control button during said lost motion movement induced manually to close said second switch means when said control button is in said ''''ON'''' position.

Claim 13

In a power driven appliance having a housing, a pair of parallel carriers slidably mounted in said housing for relative parallel movement longitudinally in said housing, power means in said housing to reciprocate said carriers in opposite directions, said carriers releasably receiving the shanks of knives in driven relationship, first switch means in said housing having a control button manually reciprocable to energize the power means and having a substantial lost motion in an ''''ON'''' position, a normally open second switch means connected in series with said first switch means, and means actuated by said control button during said lost motion movement induced manually to close said second switch means when said control button is in said ''''ON'''' position.