Take-up spool clutch with delayed engagement

Details Take-up spool clutch with delayed engagement Take-up spool clutch with delayed engagement

1995-06-01

1996-10-22

Hayes, Monroe H.

Photography

With film drive

Mechanical detail

396390, G03B 100

Patent

active

055682146

ABSTRACT:
In a camera, a take-up spool clutch assembly (34) is provided with delayed engagement by disposing a clutch spring (32) between a take-up spool (10) and a drive gear (30). The clutch spring (32) engages a lug (46) on a hub portion (40) of the take-up spool (10) with a second end (64) to drive the take-up spool (10) in the take-up direction (36) when the drive gear (30) engages a first end (60) of the clutch spring (32). Before the take-up spool (10) can rotate in the take-up direction (36) after being rotated in the rewind direction (37), the drive gear (30) must complete substantially one revolution to re-engage the second end (64) of the clutch spring (32) into driving engagement with the lug (46). The time interval consumed by the single revolution of the drive gear spool (30) is sufficient to allow a planetary clutch (90) to disengage a rewind gear (97) and engage a thrust gear (96) with a supply spool (79).

REFERENCES:
patent: 3735683 (1973-05-01), Umeda
patent: 4318603 (1982-03-01), Daitoku et al.
patent: 4572636 (1986-02-01), Konno
patent: 4724450 (1988-02-01), Miyawaki et al.
patent: 4855773 (1989-08-01), Harvey
patent: 5061950 (1991-10-01), Suzuki et al.
patent: 5160953 (1992-11-01), Iwashita et al.
patent: 5172148 (1992-12-01), Ezawa
patent: 5398089 (1995-03-01), Stiehler
patent: 5456419 (1995-10-01), Ezawa

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