Portable calculator
First Claim
1. A portable electronic calculator comprising a housing of substantially rectangular outline having a length greater than its width and being of shallow height relative to its width, said housing having an end opening receptacle at one end thereof surrounded by top, bottom and side walls, a first printed circuit board retained in said housing inwardly of said receptacle and having connected thereto a keyboard, an electronic arithmetic unit, and a multi-digit display unit, said housing having appropriate areas for visual access to said display unit and for manual access to said keyboard, a second printed circuit board, and electrical supply unit on said second printed circuit board, said electrical supply unit and said second printed circuit board being movable into and out of said receptacle and positioned thereon by said walls, and plug- and-socket connection means between said first and second printed circuit boards and automatically engaging and disengaging upon insertion and withdrawal of said second printed circuit board and electrical supply unit said second printed circuit board and said electrical supply unit being housed in a rectangular block fitting within said receptacle.
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Accused Products
Abstract
A portable electronic calculator is provided with a housing carrying a first printed circuit board having the operating parts mounted thereon, i.e., keyboard, electronic arithmetic unit, and multi-digit display unit. The housing is of rectangular outline and of shallow height, and is provided at one end with a receptacle communicating with the first printed circuit board and opening at the end of the housing. An electrical supply unit is mounted on a second printed circuit board which slides into said receptacle, said two printed circuit boards having plug-and-socket connection means therebetween for automatically making and breaking connections when said second printed circuit board and electrical supply unit are inserted into or removed from said receptacle.
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Citations
3 Claims
- 1. A portable electronic calculator comprising a housing of substantially rectangular outline having a length greater than its width and being of shallow height relative to its width, said housing having an end opening receptacle at one end thereof surrounded by top, bottom and side walls, a first printed circuit board retained in said housing inwardly of said receptacle and having connected thereto a keyboard, an electronic arithmetic unit, and a multi-digit display unit, said housing having appropriate areas for visual access to said display unit and for manual access to said keyboard, a second printed circuit board, and electrical supply unit on said second printed circuit board, said electrical supply unit and said second printed circuit board being movable into and out of said receptacle and positioned thereon by said walls, and plug- and-socket connection means between said first and second printed circuit boards and automatically engaging and disengaging upon insertion and withdrawal of said second printed circuit board and electrical supply unit said second printed circuit board and said electrical supply unit being housed in a rectangular block fitting within said receptacle.
Specification