Founding and launch of Hired Girl

The founding and launch of Hired Girl turned Dan Davis’s engineering ambition into a commercial enterprise: working with Miles Gentry in a surplus building in the Mojave Desert, Davis made a household machine from established components and sold its practical novelty as an affordable product. Its significance lies not in a single unprecedented invention but in the joining of existing technologies, careful production engineering, a defined domestic need, and a business partnership whose unequal contributions became a source of tension.

Origins and purpose

After the Six Weeks War, Davis and Gentry went into business together as insurance companies began selling cold sleep. They chose to build a small factory in an Air Force surplus building in the Mojave Desert. Davis supplied the engineering; Gentry brought law and business experience. The venture gave Davis a route to working for himself rather than joining a large corporation or returning to civil service after his military service.

Davis saw domestic work as a largely neglected field for automation. He argued that household machines had not undergone the kind of transformation already visible in industrial production, and that complaints about the shortage of domestic servants pointed to a persistent demand for help. The name Hired Girl deliberately recalled the exploited immigrant servant of an earlier generation. That uncomfortable association sat beside a practical sales proposition: the first machine was essentially an improved vacuum cleaner, intended to cost about as much as an ordinary broom.

The first machine and its design

The original Hired Girl was not the later semi-intelligent robot. It was built to clean floors continuously and without supervision. It could sweep, mop, vacuum, or polish, consulting memory tapes to select the appropriate operation. It picked up objects larger than a BB shot and placed them in a tray for a person to decide whether to keep or discard them. Its search pattern was designed to cover the floor systematically; it avoided occupied rooms unless its user switched it on there, and returned to its charging stall around dinner time. The unattended cleaning, rather than any dramatic humanlike intelligence, was enough to distinguish it from a conventional vacuum cleaner and make it sell.

Davis described the invention as a recombination of available devices rather than the creation of wholly new parts. He adapted a basic prowling pattern from the Electric Turtles described in Scientific American, used a memory circuit from a guided missile, and drew cleaning mechanisms and linkages from equipment including an army-hospital floor polisher, a soft-drink dispenser, and the remote-control hands used for handling radioactive materials. The inventive step, in his account, was how those elements were assembled; he also credited the patent lawyer with supplying the legally required spark of genius.

The decisive work was production engineering. Except for two three-dimensional cams and one printed circuit, the machine could be made from standard parts listed in Sweet’s Catalogue. Davis made the cams himself in a shed with war-surplus automated tools, while the circuit was subcontracted. At first, Davis and Gentry formed the entire assembly line, fitting, filing, and painting the machines by hand. The pilot model cost $4,317.09; the first hundred cost just over $39 apiece. They sold those units to a Los Angeles discount house for $60, and the store retailed them for $85.

Launch and growth

The early sales effort was precarious. Davis and Gentry could not afford promotion and had to offer the machines on consignment; the founders nearly starved before the receipts began arriving. A two-page feature in Life changed the scale of the operation, bringing enough demand that they needed help assembling Hired Girl. The machine’s market depended on practical usefulness and affordability, but the publicity made that usefulness visible to a much larger audience.

As sales grew, Davis worked on improvements, established a proper assembly line, and put a shop master in charge. Once production no longer occupied all his attention, he turned to designing additional household devices. In his view, the home remained far behind industrial automation: the popular language of labor-saving kitchens had not yet delivered a comparable transformation in domestic work.

Partnership and control

The business initially ran on the founders’ labor and very limited facilities. Davis and Gentry typed their own correspondence on a 1908 Underwood. They reinvested their money in the company; Davis and Pete slept in the shop, while Gentry and Ricky lived in a nearby shack. After Belle Darkin joined as a typist and bookkeeper, the three incorporated the business and gave her stock, naming her secretary-treasurer. Gentry became president and general manager; Davis became chief engineer and chairman of the board, retaining 51 percent of the shares.

Davis presented that majority as protection for his independence, not as greed. He said that more than 60 percent of the savings that started the enterprise were his and that the inventiveness and engineering behind Hired Girl were entirely his, while recognizing Gentry’s substantial work and business expertise. Davis believed he could have built the machine with another partner—or perhaps alone—but that Gentry was much better equipped to make money from it. Their arrangement thus separated technical authorship and corporate control from the business freedom Gentry received. Davis later judged that he had granted too much freedom on the business side, a retrospective qualification that gives the company’s successful launch an undercurrent of coming conflict.

From Hired Girl to a wider design program

Davis’s later inventions show how the first product fitted into a continuing method. In developing Flexible Frank, he used Thorsen memory tubes: a machine could be guided through an operation once, after which the tube would retain and repeat the procedure. Additional hunting circuits could search for specified conditions and interrupt the stored routine when necessary. Davis distinguished this from genuine judgment, describing it instead as a limited, programmed capacity to recognize a situation and respond. For tasks such as clearing a table, scraping dishes, and loading a dishwasher, the approach promised repeatable work without a human supervisor.

When he later returned to engineering in 1970, Davis built Drafting Dan before rebuilding Flexible Frank; the latter became Protean Pete, an all-purpose automaton whose abilities depended on properly instructed Thorsen tubes. He expected later descendants to develop into specialized machines, but sought broad patent claims. The progression from Hired Girl’s floor-cleaning routine to machines capable of learning and repeating wider tasks clarifies the original launch’s place in his work: its commercial achievement came from making one repetitive household job reliable and affordable, while its underlying design logic pointed toward a larger family of automated helpers.