Design and Assembly Process

Weight Scale Purchased:


Weight Watchers Memory Lithium

Features
  • Patented 2-person weight tracking system with Leveler Technology
  • Semi-conductor technology: Multiple Load Cell System
  • Accurate within 0.1-lb increments
  • Easy-to-read 1.9-inch digital display
  • 380-lb weight capacity
  • Extra-large 13 3/4 in x 13 3/4 in platform

    Website: Linens 'n Things: Weight Watchers Memory Lithium
    Photos of the Assembly Process with Brief Descriptions



    Figure 1. The CNC machine used to cut the plexiglass sheet used for the toilet seat base. Bobcad, a computer graphics design program, was used to create the toilet seat shape and was input into the CC software.
    Figure 2. Plexiglass base for weightscale after being cut by CNC machine.


    Figure 3. Weight scale after cover was removed. The LCD display, load cells, connecting and power wires can be seen.

    Figure 4. Holes were drilled through the plexiglass and weightscale. The two were then connected using 2 inch machined screws with bolts.


    Figure 5. Side view of screws attaching plexiglass and weight scale.

    Figure 6. Rubber grip was cememted to the plexiglass and was then carved to fit the shape of the weight scale. The rubber creates friciton and prevents sliding while sitting on the toilet.


    Figure 7. Weight scale being tested on actual toilet.
    Figure 8. The wires connecting the LCD to the load cells and power supply were extended 2 feet to give the client more freedom in choosing a location for the display.


    Figure 9. The wire extensions were coiled together and wrapped with electrical tape to increase strength and durability. The LCD was placed inside a project box.

    Figure 10. Final LCD display for weight scale. A hole was cut into the project box and the LCD was attached using a polyurethane glue. The display was labeled to increase user-friendliness.


    Figure 11. A 2' by 2' wood sheet was cut to 19" by 23" to be used as a seat. Small handle bars were attached using corner braces to assist the user in stabalizing themselves once on the seat.

    Figure 12. A foot rest was attached to the wooden seat to prevent any of the client's weight from being distributed to the floor.


    Figure 13. First prototype. A sheet of foam was attached to the wooden seat to add comfort for the user. The apparatus sits on an existing hadicapped accessible toilet, is light, and can easily be removed.

    Figure 14. A side view of the device showing the different layers of material.


    Figure 15. After testing the wood was replaced with aluminum. The foot rest was made adjustable by attaching drawer tracks. It was also made collapsable using hinges and velcro. The device was painted to enhance aesthetics.

    Figure 16. The scale was attached to an anchoring device using hinges which allowed for easier removal and storage. The device also allowed the scale to be adjusted to differing toilet height through the use of drawer tracks.


    Figure 17. Foot rest in collapsed position.

    Figure 18. Final weight scale resting on toilet.


    Figure 19. Weight scale in folded position.