Apparatus for filling in an opening in a wall of a safe

Details Apparatus for filling in an opening in a wall of a safe Apparatus for filling in an opening in a wall of a safe

1990-05-22

1992-04-21

Dean, R.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having marginal feature for indexing or weakened portion for...

428582, 428583, 428627, B23P 600

Patent

active

051066998

ABSTRACT:
A simple cylindrical steel element, having a tapered portion at an insertion end and a plug of a difficult-to-machine material securely attached therein, is forcibly inserted into a previously formed hole, e.g., in a hard inner layer of a multilayer wall of a safe for containing valuables. To facilitate intromission of the tapered end of the device into the hole, all layers except the hard inner layer are machined to slightly enlarge the hole originally formed therethrough. In the preferred embodiment, markings in the form of regularly spaced circumferential grooves are provided along the length of the device and are readily utilizable to determine where the device should be cut so that, by the application of a sharp force as from a hammer, the tapered end of the device, with the hard-to-machine plug embedded therein, is firmly lodged into the hard inner layer. Welding material is provided thereafter to firmly connect an outer end of the device with the material of an outer layer of the wall.

REFERENCES:
patent: 2010569 (1935-08-01), Sitzler
patent: 3066400 (1962-12-01), Forsythe
patent: 3203479 (1965-08-01), Hindman
patent: 3376118 (1968-04-01), Odenthal
patent: 3831240 (1974-08-01), Boggs et al.
patent: 3837066 (1974-09-01), Mori et al.
patent: 4662806 (1987-05-01), Reed

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