Sound alarm device in a camera

• US 4,238,146 A
• Filed: 08/23/1979
• Issued: 12/09/1980
• Est. Priority Date: 08/25/1978
• Status: Expired due to Term

• Current Assignee: Nikon Corporation
• Original Assignee: Nippon Kotsu Kabushiki Kaisha (Nikon Corporation)
• Inventors: Kitamura, Yasunori, Motoori, Ryuzo, Takemae, Mikio, Ohtsubo, Yoshiaki, Watanabe, Sakuji, Akasaka, Shigeo
• Primary Examiner(s): Gellner, Michael L.
• Application Number:
  US06/069,166
• Time in Patent Office: 474 Days
• Field of Search: 354/53, 354/60 E, 354/60 L, 354/289
• US Class Current: 396/239
• CPC Class Codes: G03B 17/20 visible in viewfinder

Abstract

An alarm device in a camera comprises a shutter speed manual/auto change-over dial having a first Auto position and a second Auto position, and alarm sound generating circuit operatively associated with the change-over dial so as to become operative in the first Auto position and to become non-operative in the second Auto position, and means for visually displaying the sound alarm non-operation condition which is operatively associated with the change-over dial so as to become non-operative in the first Auto position and to become operative in the second Auto position.

Claims

1. An alarm device in a camera having means for generating an alarm sound for the operative condition of an exposure control circuit for determining the shutter speed in accordance with exposure information and/or the determined shutter speed, the improvement comprising:

a shutter speed change-over dial changeable over to a first auto position and a second auto position, said dial, when in any of said first and second auto positions, being effective to energize said exposure control circuit into its operative condition;

switch means responsive to the change-over operation of said change-over dial so as to energize said alarm sound generating means when said change-over dial is in said first auto position and to deenergize said alarm sound generating means when said change-over dial is in said second auto position; and

display means capable of effecting a visual display at a recognizable position through the eyepiece portion of the finder of said camera, said display means being energized in response to the change-over operation and adapted, when energized, to effect said display.

2. The device according to claim 1, further comprising means for selectively energizing one of said alarm sound generating means and said display means.

3. The device according to claim 2, wherein said display means includes a light-emitting display element, and said energizing means includes switch means capable of selectively applying a source voltage.

4. The device according to claim 2, wherein said display means includes a colored transparent member capable of entering into the view field of said finder.

5. The device according to claim 4, wherein said camera has a member for displaying the shutter time within the view field of said finder, and said colored transparent member is provided so as to overlap at least a part of said display member when it enters into the view field of said finder.