Method of, and apparatus for, burn-fitting wooden gun stocks to metal receivers

Claim 2

Method of fitting a wooden gun stock to a seat on a metal receiver, which comprises forming on the stock a counter seat of the approximate shape of the receiver seat but with the wood thereof left to interfere with uniform seating of the counter seat on the receiver seat, placing the cold receiver in a holding fixture, subjecting only a part of the fixture-held receiver, including its seat, to high-frequency induction heating, terminating the induction heating of said part of the fixtureheld receiver when the remainder of the receiver is still cold and the receiver seat reaches a temperature for complete burn-fit with the wooden counter seat, and while said receiver part is substantially at said burn-fit temperature and said remainder of the receiver is still cold, forcing the stock with its counter seat against the heated seat on the fixture-held receiver into complete burn-fit therewith.

Claim 3

Method of fitting for interprojection a tanged gun stock to a tanged receiver, with the receiver having seats for the ends of the stock tangs and the stock tangs having excess wood interfering with full interprojection of the respective tangs to the receiver seats, which comprises placing the cold receiver in a holding fixture, subjecting to high-frequency induction heating a part only of the fixture-held receiver, including its seats and the portions of its tangs which hold the stock tangs with their ends out of complete fit with the receiver seats, terminating the induction heating of said part of the fixture-held receiver when the remainder of the receiver is still cold and the receiver seats and tang portions reach a temperature for burn-off of the interfering excess stock wood and complete burn-fit of the ends of the stock tangs with the receiver seats, and while said receiver seats and tang portions are substantially at said burn-off and burn-fit temperature and said remainder of the receiver is still cold, fully interprojecting the stock tangs and the heated tangs on the fixture-held receiver to complete burn-fit of the stock tang ends with the receiver seats.

Claim 4

Method of fitting for interprojection a tanged gun stock to a tanged receiver, with the receiver having seats for the ends of the stock tangs and the stock tangs having excess wood interfering with full interprojection of the respective tangs to the receiver seats, which comprises placing the cold receiver in a holding fixture, subjecting to high-frequency induction heating a part only of the fixture-held receiver, including its seats and the portions of its tangs which hold the stock tangs with their ends out of complete fit with the receiver seats, terminating the induction heating of said part of the fixture-held receiver when the remainder of the receiver is still cold and the receiver seats and tang portions reach a temperature for burn-off of the interfering excess stock wood and complete burn-fit of the ends of the stock tangs with the receiver seats, and while said receiver seats and tang portions are substantially at said burn-off and burn-fit temperature and said remainder of the receiver is still cold, fully interprojecting the stock tangs and the heated tangs on the fixture-held receiver to complete burn-fit of the stock tang ends with the receiver seats.

Claim 5

Method of fitting for interprojection a tanged gun stock to a tanged receiver, with the receiver having seats for the ends of the stock tangs and the stock tangs having excess wood permitting partial interprojection of the respective tangs but interfering with their full interprojection to the receiver seats, which comprises partially assembling the cold receiver and stock by partially interprojecting their tangs, placing the partially assembled receiver and cold stock in a holding fixture, subjecting to high-frequency induction heating a part only of the fixture-held receiver, including its seats and the portions of its tangs which hold the stock tangs with their ends out of complete fit with the receiver seats, terminating the induction heating of said part of the fixture-held receiver at the end of a period of induction heating of the same when the remainder of the receiver is still cold and said receiver seats and tang portions reach a temperature for burn-off of the interfering excess stock wood and complete burn-fit of the ends of the stock tangs with the receiver seats, and while said receiver seats and tang portions are substantially at said burn-off and burn-fit temperature and said remainder of the receiver is still cold, fully interprojecting the partially interprojected tangs on the fixture-held stock and heated receiver to complete burn-fit of the stock tang ends with the receiver seats.

Claim 6

Method of fitting for interprojection a tanged gun stock to a tanged receiver, with the receiver having seats for the ends of the stock tangs and the stock tangs having excess wood permitting partial interprojection of the respective tangs but interfering with their full interprojection to the receiver seats, which comprises partially assembling the cold receiver and stock by partially interprojecting their tangs, placing the partially assembled receiver and cold stock in a holding fixture, subjecting to high-frequency induction heating a part only of the fixture-held receiver, including its seats and the portions of its tangs which hold the stock tangs with their ends out of complete fit with the receiver seats, terminating the induction heating of said part of the fixture-held receiver at the end of a period of induction heating of the same when the remainder of the receiver is still cold and said receiver seats and tang portions reach a temperature for burn-off of the interfering excess stock wood and complete burn-fit of the ends of the stock tangs with the receiver seats, and while said receiver seats and tang portions are substantially at said burn-off and burn-fit temperature and said remainder of the receiver is still cold, fully interprojecting the partially interprojected tangs on the fixture-held stock and heated receiver to complete burn-fit of the stock tang ends with the receiver seats.

Claim 7

Method as in claim 3, in which the wood burn-off temperature of the receiver seats and tang portions in within a range from approximately 600* F to approximately 700* F.

Claim 8

Method as in claim 3, in which the partially interprojected tangs are fully interprojected by applying to the fixture-held stock a force thrusting the same against the fixture-held receiver.

Claim 9

Method as in claim 3, in which the partially interprojected tangs are fully interprojected substantially at the end of said period.

Claim 10

Method as in claim 5, in which said force is applied to the stock prior to the end of said period and maintained thereon until complete burn-fit of the stock tang ends with the receiver seats is achieved.

Claim 11

Method as in claim 3, in which said period is less than 10 seconds.

Claim 12

Method as in claim 3, in which the stock has seats for the receiver tang ends, and the partially interprojected tangs are fully interprojected to complete burn-fit of the stock tang ends with the receiver seats and rest of the receiver tang ends on the stock seats. 10 Method as in claim 3, in which the stock has seats for the receiver tang ends, said receiver tang ends are also included in the receiver part which is subjected to high-frequency induction heating, and the partially interprojected tangs are fully interprojected to complete burn-fit of the stock tang ends and receiver tang ends with the receiver seats and stock seats, respectively.