Dot matrix print head

Claim 2

Apparatus for removably mounting a dot matrix print heaad in yoke means comprising: at least one support member having means adapted to receive engagement means which is to be held in a stationary position against said yoke means; hole means in said yoke means through which said support member is movably positioned; a pair of receiving means in said print head for receiving opposite ends of said support member to mount said print head to said yoke means; and spring means within one of said receiving means for maintaining one end of said support member removed from the back of that one receiving means and for being compressed to allow the other end of said support member to be removed from the other of that pair of receiving means whenever said engagement means is held in said stationary position.

Claim 3

The invention according to claim 1 wherein said spring means is compressed by movement of said print head against said support member while said support member is held stationary against said yoke means.

Claim 4

The invention according to claim 2 wherein said apparatus further comprises means for urging said support member forward into said other receiving means.

Claim 5

The invention according to claim 1 wherein said means adapted to being held includes a hole in said support member.

Claim 6

The invention according to claim 4: wherein said apparatus further comprises second spring means and stop means affixed to said support member, said second spring means being positioned between said stop means and said yoke means; and wherein said hole in said support member is exposed when said spring means is compresssed, said hole in said support means being adapted to receive pin means to be held against said yoke means upon release of said spring means.

Claim 7

Apparatus for removably holding a dot matrix print head comprising yoke means having first and second holes; a pair of support members each having two ends separated by a given distance and each positioned through an associated yoke means hole, each of said support members having means adapted to receiving holding means to hold that support member stationary against said yoke means; two pair of first and second receiving means each positioned on said yoke means, each pair of receiving means being associated with and engaging a support member, each receiving means having a front and a back, the distance between the front of one and the back of the other receiving means of each pair of receiving means being greater than said given distance and the distance between the back of said one and the front of said other receiving means of each pair of receiving means being less than said given distance; and spring means, positioned within each second receiving means between one end of said support member and the back of that receiving means, for being compressed by movement of said print head against said support member while said support member is held stationary against said yoke means to allow the other end of said support members to become disengaged from said first receiving means.

Claim 8

Apparatus for removably holding a dot matrix print head comprising yoke means having first and second holes; a pair of support members each having two ends separated by a given distance and each positioned through an associated yoke means hole, each of said support members having means adapted to receiving holding means to hold that support member stationary against said yoke means; two pair of first and second receiving means each positioned on said yoke means, each pair of receiving means being associated with and engaging a support member, each receiving means having a front and a back, the distance between the front of one and the back of the other receiving means of each pair of receiving means being greater than said given distance and the distance between the back of said one and the front of said other receiving means of each pair of receiving means being less than said given distance; and spring means, positioned within each second receiving means between one end of said support member and the back of that receiving means, for being compressed by movement of said print head against said support member while said support member is held stationary against said yoke means to allow the other end of said support members to become disengaged from said first receiving means.

Claim 9

The invention according to claim 6 wherein said support members are slideable through said yoke means holes.

Claim 10

The invention according to claim 7 wherein said means adapted to receiving said holding means includes a hole in said support member adapted to receive a pin, said support member hole being normally hidden within the yoke means hole, and being exposed as said support member slides through said yoke means holes.

Claim 11

The invention according to claim 8 wherein said support member includes stop means and second spring means between said stop means and said yoke means hole for urging said support member forward.

Claim 12

The invention acocrding to claim 9 wherein the side of said stop means remote from said spring means is positioned against said yoke means to stop the forward movement of said support means beyond a desired position.