Design and Manufacture a Murphy Bed Lock for Wood Products Unlimited (WPU)
Bibliographic record
Abstract
A Murphy bed is a foldable bed frame that can be vertically stored against a wall when not in use to save space. Wood Products Unlimited (WPU) is a Canadian-based manufacturer that makes and sells a Murphy bed product, the Embed. WPU wants a locking mechanism designed for the Embed that customers can choose to purchase with the Embed as an optional add-on. The purpose of the locking mechanism feature is to enhance overall safety and help avoid misuse of the Murphy bed. A few key features of the locking mechanism include a 12V DC power supply that will power a keypad and two solenoids. Each solenoid and its electrical circuit are protected by a steel case mounted at each corner of the bottom rear bed frame to increase the strength and durability of the attachment of the solenoids to the bed. The locking mechanism works by allowing authorized users of the bed to lock and unlock the Murphy bed using the keypad. When the bed is in the closed position, the extended solenoid pins restrict bed movement and lock it upward. The authorized user can use the keypad to control the solenoids and retract the pins so the Murphy bed can be lowered to the open position. If the authorized user wants the bed to be locked in the open position, they would have to reuse the keypad to re-extend the solenoid pins outward, which would lock the bed in the open position. Custom modifications will be made to both solenoids, such as a pin extension connected to the pin armature. A prototype testing rig was manufactured to simulate the forces that will be exerted on the locking mechanism and to observe the positioning of components during movement. The testing rig was used to ensure minimal force is experienced by the solenoid and to verify it will not be damaged at the armature or mounting point. The locking mechanism design had to be complete and functional within eight months and cost under $200 CAD to manufacture. The budget constraint was met but the validation results of the application of the locking mechanism onto an Embed were left unresolved due to time constraints. If the locking mechanism is successful, this design would position the Embed as the sole Murphy bed on the market with this unique capability, providing WPU with a competitive advantage over other manufacturers.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.020 | 0.016 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".