Chronograph

Details Chronograph Chronograph

1977-08-18

1978-12-12

Krawczewicz, Stanely T.

Electricity: measuring and testing

Electrical speed measuring

Including 'event' sensing means

73167, 246182A, 3403094, 346 38, 250222R, 324189, G01P 366

Patent

active

041298292

ABSTRACT:
An apparatus for measuring velocity of a bullet is shown. A portable clamping device securely holds the barrel of a gun in position during firing. A bullet fired from the gun is projected through two openings located a predetermined distance apart from the end of the gun barrel. The bullet passing through the first opening activates a timing circuit to start current flow through a measuring device. The bullet passing through the second opening stops the current flow through the measuring device. The measuring devices gives an output indication that is indirectly proportionate to velocity of the bullet with units indicating the speed of the bullet. The measuring device may be a ballistic meter with no return springs on a meter movement to remain in its maximum position after measuring current flow therethrough.

REFERENCES:
patent: 2294730 (1942-09-01), Eggers
patent: 2729288 (1956-01-01), Malott
patent: 2787738 (1957-04-01), Hisle
patent: 3184678 (1965-05-01), Roth
patent: 3567951 (1971-03-01), Montgomery, Jr. et al.
patent: 3675030 (1972-07-01), Tanenhaus

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