Convertible open-arm sewing machine
CA 1065689 A · Owner: White Sewing Machine Company (Delaware) · Inventors: Bell, Charles M.; Hamlett, Sidney J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sewing machine convertible between flat bed and cylinder bed configurations and adapted to be mounted in cabinets of conventional design. The machine includes a base cabinet arranged to alternately support a lower cylinder arm flush with a cabinet top for flat work and at an elevated position above the cabinet top for tubular work. An auxiliary work supporting surface for flat work is responsive to relative movement between the machine frame and the support base such that it automatically retracts or extends during positioning of the machine frame between its flat bed and free arm operational positions. Counterbalancing means is provided to reduce manual effort of raising or lowering the …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.