A “Toolbox” for Forensic Engineers

416 Forensic Materials Engineering: Case Studies
25
53
17
15
19
11
23
17
11
15
13
39 35
33
29
41
13
21
63
A
37
51 55
61 59
27
31
35
45
57
63
27
31
35
3745
57
B
41
51
43
C
E
37
13
39 33
13
51
47
45
31
35
59
61
17
59
15
Figure 13.17 Preferred embodiment of TRC residual current device: (A), (B)
(C) unprimed state with electrical contacts open; (D) fully primed state with
elecrical contacts closed; (E) actuation with latch arm bent to one side by cam 61.
4. Adjusting means to condition said actuating means to enable closing of
said contact means;
5. And electrically energised holding means separate from said adjusting
means but which co-operates with said actuating means once conditioned
to maintain the conditioning of said actuating means and close
said contact means only when the voltage across said holding means
exceeds a pre-determined level.
The key parts described in the claim (with their part numbers) include
Contact means (contacts 27 and 31)
Mechanical actuating means (leaf spring 37)
Adjusting means (button 17) and
Electrically energized holding means (armature 57)
63
57
53
D
11
13
51
15
47
48
45
57
59
17
19
27
31
35