Projector

Claim 3

The device of claim 1, wherein the movable plate slidably mounted for movement in a first direction with respect to said base member has a plurality of slots therein, the axes of said slots aligned in said first direction; said base member has a plurality of pins thereon engageable in the slots in said movable plate; and a biasing means is connected between said base member and said movable plate for maintaining said movable plate in one of two positions with respect to said base member, said two positions being the extremities of the path along which said movable plate may move with respect to said base member.

Claim 4

The device of claim 1, wherein said means for engaging and disengaging said gear wheels comprises: a pawl lever pivotalLy mounted on a side face of the rotatable toothed gear wheel and biasing means biasing one end of said pawl lever toward a projection on a side face of said driving gear wheel; an actuating lever pivotally mounted on said base member, one end of said actuating lever engageable with the end of said pawl lever which is biased toward said projection on said driving gear wheel, and another biasing means biasing said end of said actuating lever away from said projection on said driving gear wheel for maintaining said pawl lever out of engagement with said projection on said driving wheel; means for moving said end of said actuating lever toward said driving gear wheel out of engagement with said pawl lever whereby the end of said pawl lever is engageable with said projection on said driving gear wheel for initiating engagement of said driving gear wheel with said rotatable toothed gear wheel; and said rotatable toothed gear wheel has a plurality of gear teeth missing at its periphery near the extension of the radius of said rotatable wheel which includes the point at which the crank arm is engaged with said rotatable wheel, said missing teeth forming a recess in the periphery of said rotatable wheel for disengaging said rotatable wheel from the driving gear wheel.

Claim 5

The device of claim 1 additionally comprising: a crank arm coupling said other end of said slidably mounted driving member with said rotatable toothed gear wheel; a first L-shaped lever pivotally mounted near its elbow to the base member, one end of said lever having a slot therein engaged by a pin on a side surface of said rotatable wheel, said pin also engaging the end of said crank arm, the opposite end of said first lever having a pin therein; a second L-shaped lever pivotally mounted near its elbow to the movable plate, one end of said second lever engageable with said pin in said opposite end of said first lever, and the opposite end of said second lever engageable with a first longitudinal edge of said container; a third L-shaped lever pivotally mounted near its elbow to the base member, said third lever located on the diametrically opposite side of said rotatable wheel from said first lever, and one end of said third lever having a slot therein engaged by said pin on said rotatable wheel, the opposite end of said third lever having a pin therein; a fourth lever extending transversely across the width of said container, one end of said fourth lever engageable with the pin on the opposite end of said third lever, and the opposite end of said fourth lever terminating near the second longitudinal edge of said container; a fifth lever pivotally mounted to the opposite end to said fourth lever, and one end of said lever biased into engagement with the second longitudinal edge of said container by a first biasing means; a sixth L-shaped lever pivotally mounted near its elbow to the movable plate at the same point at which said second lever is pivotally mounted to said movable plate, one end of said sixth lever engaging the first longitudinal edge of said container, and the opposite end of said sixth lever pivotally connected to said fourth lever through a linkage member which is pivotally mounted to said fourth lever so that the axis of said linkage member is approximately parallel to the longitudinal edges of said container; the first longitudinal edge of said container having a straight camming surface thereon which is about as long as the aperture in said container and which is recessed at its ends, said camming surface and recessed ends engageable with one end of each of said second and sixth levers, and the second longitudinal edge of said container having an evenly spaced series of notches therein for engagement with a roller mounted on first end of said fifth lever.

Claim 6

The device of claim 4, additionally comprising: a second biasing means urging the opposite ends of said second lever toward the opposite end of said first lever; and a third biasing means biasing the opposite end of said second lever in a direction away from said fourth lever.

Claim 7

The device of claim 1, wherein said driving pawl means comprises: a first driving pawl for engaging the ratchet-like projections in one row of said projections which face said first driving pawl, for advancement of said container during said first 180* of rotation of said rotatable wheel; and a second driving pawl for engaging the ratchet-like projections of another row of said projections facing the opposite direction from the ratchet-like projections of said first row for engaging said second pawl for advancement of said container in the opposite direction during the second 180* of rotation of said rotatable wheel.