Education and demonstration – Organized armed or unarmed conflict or shooting – Gunnery
Patent
1983-12-30
1985-06-04
Grieb, William H.
Education and demonstration
Organized armed or unarmed conflict or shooting
Gunnery
F42D 700
Patent
active
045211957
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for simulating the report effect of a blank cartridge when firing small arms.
Firing blank cartridges is performed at present in the use of small arms by loading the magazine of the weapon with rounds having a propulsion charge but no bullet. Manufacturing, transport handling and storing of the blank cartridges result in costs which can amount to a considerable sum per year. The object of the present invention is therefore to provide a device which makes it possible to provide the desired report effects of blank cartridges when firing small arms in a way such that the costs for firing with blank cartridges is considerably reduced in relation to the above mentioned costs.
This is achieved with a device working with a compressed gas such as compressed air, the device in accordance with the invention having the characterizing features defined in the following claims.
In the inventive device there is thus a housing which is fitted to the weapon instead of the ordinary cartridge magazine, the housing containing a first valve which can be coupled to the trigger of the weapon via a link system. In the housing there is a compressed air container in the form of a chamber provided with a nipple, to which a hand-driven pump may be connected for charging the container with compressed air. Alternatively, an exchangeable container may be used, which is charged beforehand with the aid of a stationary compressed air source. When the trigger is activated, communication between the compressed air container and a dosing chamber is closed with the aid of a first valve, a second valve being simultaneously activated to open the outlet from the dosing chamber, from which a predetermined quantity of compressed air flows out to the atmosphere with a report. When the trigger is released and returned to the rest position, the dosing chamber will be recharged.
A suitable embodiment of the device in accordance with the invention is shown as an example on the accompanying drawing.
FIG. 1 is a section through a device in accordance with the invention, taken along the line 1--1 in FIG. 2,
FIG. 2 is a view of the device seen from the front, and
FIG. 3 illustrates the valves in a position corresponding to completely depressed trigger for letting out a quantity of compressed air with a report effect.
In the Figures there is shown a housing 10 with approximately the same size and shape as a conventional cartridge magazine for a weapon such as an automatic carbine. This housing can be fitted to the weapon instead of the cartridge magazine.
In the housing there is a compressed air chamber 11 which, via a nipple 12 and non-return valve, can be filled with a pressurized gas such as compressed air with the aid of a hand-operated pump or in some other way.
In the housing there is also a cylindrical dosing chamber 13 which, with the aid of an axially movable piston disc 14, is divided into an inlet chamber 13A and an outlet chamber 13B. The piston disc is provided at its edge with a lip sealing 14A, functioning as a one-way valve for the stream of compressed air from the chamber 13A to the chamber 13B when the chamber 13A is filled with compressed air, but which prevents flow back in the opposite direction.
A valve housing 15 is also included in the device, and has a slide valve 16 in the form of a plunger which is movable between two end positions to form a first valve in the device.
The piston disc 14 coacts with a seat 17 at the inlet end of a throat forming an outlet 18 from the outlet chamber 13 of the compressed air chamber, the piston disc functioning as a second valve in the device.
The slide valve 16 has an annular groove 19 which, in the open position of the valve shown in FIG. 1, opens the communication between a radial channel 20 from the chamber 11 to a channel 21 leading the compressed air to the inlet chamber 13A, the piston disc 14 then being pressed against the seat 17 to close the outlet 18. The supplied compressed air flows past the elastic lip 14A to charge the outlet chamber 13B, the vo
REFERENCES:
patent: 3238642 (1966-03-01), Ohlund
patent: 3272510 (1966-09-01), Ohlund
patent: 3334425 (1967-08-01), Ohlund
patent: 3423848 (1969-01-01), Ohlund
patent: 4302190 (1981-11-01), Shaw et al.
patent: 4380437 (1983-04-01), Yarborough, Jr.
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