Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving
Patent
1980-07-24
1982-11-16
Downey, Kenneth
Movable or removable closures
Plural wings radiate from common pivot; i.e., revolving
49 46, 403378, 403205, 403218, E06B 1108
Patent
active
043589090
ABSTRACT:
A new turnstile is provided which is constructed from a minimum number of different extruded components and includes an improved turnstile control mechanism. The turnstile is comprised of a plurality of upstanding, spaced mounting columns which define a frame-like structure. One mounting column includes a plurality of spaced apart barrier arms extending radially therefrom. Closure means extend between at least a pair of mounting columns which are spaced opposite the one column. A pivot column is rotatably journaled intermediate the one and the at least a pair of mounting columns and includes a plurality of longitudinal grooves. A plurality of pivot column arms associated with each pivot column groove extend radially therefrom at spaced apart intervals to permit free passage between the barrier arms when the pivot column is rotated. Concealed locking pins and extruded spacers are advantageously employed to retain the barrier and pivot column arms in spaced, mounted relationships with the associated one mounting column and the pivot column. A pivot control mechanism selectively controls rotation of the pivot column and includes means to accommodate a plurality of different operational modes. An alternative embodiment comprises two pivot columns spaced apart from the at least a pair of mounting columns.
REFERENCES:
patent: 1658264 (1928-02-01), Sutton et al.
patent: 3839825 (1974-10-01), Nica
patent: 3978613 (1976-09-01), Hayward et al.
LandOfFree
Turnstile does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Turnstile, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Turnstile will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1431754