Lens mount with noise reducing means

Details Lens mount with noise reducing means Lens mount with noise reducing means

1984-11-28

1986-03-25

Hayes, Monroe H.

Optics: motion pictures

With sound accompaniment

Housing and supports

G03B 3100

Patent

active

045779449

ABSTRACT:
A lens mount, especially but not exclusively for use with motion picture cameras, with special means for preventing transmission of noise through the lens mount from operation of moving parts within the camera to a microphone located in front of the camera. A focusing lens mount has two mounting parts which are movable axially relative to each other, and with a small clearance space between these two parts. An annular groove is provided, extending circumferentially around a cylindrical portion of one of these mounting parts. In this groove is a sound damping or impeding element, resiliently pressed against a companion cylindrical surface on the other of the mounting parts, to block passage of sound through the clearance space between the two cylindrical parts. The sound damping element is made of material having good dry-sliding characteristics.

REFERENCES:
patent: 1221407 (1917-04-01), Amet
patent: 4013352 (1977-03-01), Monroy

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