Title: Drafting apparatus

Abstract: A drafting aid comprising a flat board, the board having two straight parallel edges and guide surfaces at the parallel edges. A flexible member passes about the board and over the guide means. The flexible member includes resilient tension members extending between the end edges thereof to form a taut member about the board.

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Inventors: Bachley, Peter V.

Application Number: 850677
Filing Date: 1977-11-11
Publication_date: 1980-05-13
Assignee:
Primary Class(es): 33/444 24/33B, 108/50.17
Other Classes:
US Patent Ref:

1477409	Dec, 1923	Woolman	312/231.
1506489	Aug, 1924	Kiefer	24/33.
2622364	Dec, 1952	Hine	242/61.
2696415	Dec, 1954	Himelson	312/231.
3108028	Apr, 1965	Roccati	33/79.
3330580	Jul, 1967	Vanek	108/50.
3630588	Dec, 1971	Baker	312/231.
3669227	Jun, 1972	Alford	312/231.
4200173	Feb, 1978	Closterman	312/231.

Other Refs:
Primary Examiner: Phillips, Charles E.
Assistant Examiner:
Attorney: Swabey, Mitchell, Houle, Marcoux and Sher