MIL-C-21676 Mine Case Mark 36 Mod 2

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MIL-C-21679(NOrd)

3.2.5.3 Verge adjustment. - The verge shall be adjusted

to provide the same amount of drop between the corner of the

incoming pallet and the escape wheel tooth as there is be-

tween the corner of the departing pallet and the escape wheel

tooth. Adjustment and testing shall be as specified in

4.6.3.3.

3.2.5.4 Locking and starting. - The mechanism shall op-

erate when the stop lever is depressed by a force not greater

than 2 1/4 pounds. The mechanism shall operate when the

stop lever is 0.095 inch from the bottom plate and shall stop

when the stop lever is 0.200 inch from the bottom plate. Test-

ing and measuring shall be as specified in 4.6.3.4.

3.2.5.5 Timing. - With the clock in any position, the two

switches shall have the following timing sequence as tested

at the end of the clock cable.

(a) Switch A shall close in 60 minutes � 10 percent and

shall open 4 � 2 minutes later.

(b) Switch C shall close in 170 minutes � 10 percent.

The over-run time of the mechanism after the operation

of the

last switch shall be not less than 18 minutes. Switch

C shall

remain closed and switch A shall remain open after the

mechan-

ism has run down. Compliance with timing requirements

shall

be determined as specified in 4.6.3.5.

3.3

Environmental requirements.

3.3.1 Temperature. - Mechanisms covered by this speci-

fication shall be subjected to temperature conditions, for

storage and operation, and tested as specified in 4.7.1.

Thereafter, the mechanism shall meet all performance require-

ments and product characteristics of this specification.

3.3.2 Vibration. - Mechanisms covered by this specifi-

cation shall be mounted and vibrated as specified in 4.7.2

and thereafter shall show no damage and shall meet all per-

formance requirements and product characteristics of this

specification.

3.3.3 Mechanical shock. - Mechanisms covered by this

specification shall be subjected to the shock test as speci-

fied in 4.7.3, and thereafter shall show no damage and shall

meet all performance requirements and product characteristics

of this specification.