Related Records

1. Capacitance-Impedance Calculator, 1963 - Calculator, Capacitor Impedance

   Capacitance-Impedance Calculator, 1963. Slide rule style capacitance-impedance calculator is made from three layers of cardboard printed with black and orange ink. The front and back pieces are attached together with metal rivets at each rounded corner. The front piece of cardboard has measurement markings printed on the surface and two rectangular pieces cut out on the left side. A slightly smaller piece of cardboard that has corresponding mark...

   Record Type: Object

   
2. Magic Brain Calculator, c. 1950-1969 - Machine, Calculating

   Magic Brain Calculator, c. 1950-1969, includes calculator (A), stylus (B), instructions for use (C) and original box (D). Calculator (A) is a durable red plastic with a tin metal plate mounted to the top by six small circular rivets. Printed on tin plate is "Chadwick" in red and "MAGIC-BRAIN / CALCULATOR / + - x" in black. Below name are 8 open boxes with black rotating numbers on a white ground; numbers correspond to 8 vertical openings b...

   Record Type: Object

   
3. Thermofit Heat-Shrinkable Tubing Calculator, 1973 - Calculator

   Thermofit Heat-Shrinkable Tubing Calculator, 1973. Slide-rule style heat-shrink tubing calculator produced by the Raychem Corporation. The rectangular calculator is made from three layers of cardboard printed with blue and black ink on a white background. The front and back pieces are attached with metal rivets at each rounded corner. A slightly smaller piece of cardboard is sandwiched between the two exterior pieces. As this inner piece slides ...

   Record Type: Object

   
4. Thermofit Heat-Shrinkable Tubing Diameter Gauge, c. late 1950s-1971 - Gauge

   Thermofit Heat-Shrinkable Tubing Diameter Gauge, c. late 1950s-1971. White cardboard heat-shrinkable tubing gauge produced by the Raychem Corporation. The rectangular gauge is made from three pieces of cardboard that swivel on a metal rivet attached at the bottom right corner. Information is printed in green ink. The top two pieces of cardboard have measurements along sections that are cut out to fit various sizes of tubing. Text on the front re...

   Record Type: Object