Appeal No. 96-3305
Application 07/607,147
The disclosed invention relates to an accessory device (i.e., a lens) that is mounted onto a
camera. A power source 2 in the camera supplies power to a drive motor 9 and an electrical circuit 10
located in the lens (Figure 1). A first ground line L3,L10 is used to ground lens motor 9, and a second
ground line L4,L11 is used to ground electrical circuit 10.
Claim 26 is illustrative of the claimed invention, and it reads as follows:
26. An accessory device constituting at least part of a photographic optical system and
adapted to be mounted on a camera, said camera including a power source therein, a mount, a first
electric circuit for producing control signals, first terminal means for outputting said control signals,
second terminal means for supplying power from said power source, and first and second ground
terminals for said power source, said first and second ground terminals being connected to said power
source through separate electrical conductors, said accessory device comprising:
(a) means for attaching the accessory device onto said mount of the camera;
(b) third terminal means to be connected with said second terminal means when said accessory
device is mounted on the camera and third and fourth ground terminals to be independently connected
with said first and second ground terminals, respectively;
(c) fourth terminal means to be connected with said first terminal means when said accessory
device is mounted on the camera;
(d) a motor circuit connected to said third terminal means and said third ground terminal, and
being supplied with power through said third terminal means and said third ground terminal, first
electrical conductor means being connected between said third terminal means and said third ground
terminal; and
(e) a second electric circuit having input terminal means and connected to said third terminal
means and said fourth ground terminal, said second electric circuit being supplied with power through
said third terminal means and said fourth ground terminal, second electrical conductor means embodied
separately from said first electrical conductor means being connected between said third terminal means
and said fourth ground terminal, and the input terminal means connected with said fourth terminal means
2
Page: Previous 1 2 3 4 5 Next
Last modified: November 3, 2007