Geometrical instruments – Straight-line light ray type – Aerial bomb sight
Patent
1983-08-26
1985-08-13
Martin, Jr., William D.
Geometrical instruments
Straight-line light ray type
Aerial bomb sight
279 2R, F41G 154
Patent
active
045341168
ABSTRACT:
A boresighting instrument which comprises a muzzle end adapter having a frustro conical outer periphery adapted to be inserted into the muzzle end of a barrel threadably receiving a central shaft, a sleeve is coaxially coupled to the muzzle end adapter and extends to a radially extending member, the central shaft extends to the radially extending plate and has coupled thereto an expandable member comprising a plurality of rigid finger members equiangularly disposed about the axis of the central shaft and secured together by an elastomeric material, the fingers of the expandable member have frustro conical inner edges, an expander member is secured to the central shaft and has a frustro conical surface adapted to engage the inner edges of the fingers whereby when the central shaft is rotated in one direction on the threaded connection with the muzzle end adapter, the expander member forces the fingers radially outwardly into engagement with the inner periphery of the barrel.
REFERENCES:
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patent: 2353272 (1944-07-01), Simmons et al.
patent: 2367288 (1945-01-01), Klopp et al.
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patent: 2654413 (1953-10-01), Weidel
patent: 2696052 (1954-12-01), Czarnikow
patent: 2852262 (1958-09-01), Parker et al.
patent: 3112567 (1963-12-01), Flanagan
patent: 3228108 (1966-01-01), Chaperon
patent: 4090305 (1978-05-01), Cassidy
Lenzar Optics Corporation
Martin, Jr. William D.
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