Janome Sewing Machine Company Limited

Shiro Takei

Susumu Hanyu

Shuzo Morimoto

An opening plate which closes a lower thread bobbin is provided with a drawing of a bobbin on its surface. A bobbin drawing is exactly overlapped with the bobbin when the plate is completely closed. Also a drawing of a thread tension adjusting device in a required position and a drawing of a lower thread normal path are provided on the opening plate. The drawings indicate to a machine operator the position of lower thread holding bobbin correctly inserted in a horizontal full rotation loop taker device and the path of drawing of the lower thread therefrom so as to enable the operator to insert the lower thread holding bobbin in the horizontal full rotation loop taker device correctly in place, and pass the lower thread wound on the bobbin through the thread tension adjusting device correctly.

Opening plate for attaching a lower thread bobbin of a sewing machine

A sewing machine provided with a set of pattern generating cams is also provided with a user-operated multi-setting pattern selector dial. When the selector dial is turned to a particular setting, to thereby cause the pattern generating cams to generate the corresponding pattern, a first mechanism automatically selects a respective feed pitch (amount of cloth feed per needle penetration), appropriate for the type of pattern selected. Accordingly, the user is not troubled to determine, by trial or error or otherwise, what feed pitch values would be clearly unsuitable for the selected pattern, and is instead automatically presented with a standard feed pitch value appropriate for the selected pattern. However, the user can also turn a second selector dial to increase the automatically selected standard feed pitch value by an amount up to 50% thereof, or alternatively to decrease the automatically selected feed pitch value by an amount up to 50% thereof, for example to take into account unusual thinness or thickness of the cloth being sewn on.

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Oume, Japan

Shiro Takei