Hints for the improvement of trusses : intended to render their use less inconvenient, and to prevent the necessity of an understrap : with the description of a truss of easy construction and slight expense, for the use of the labouring poor, to whom this little tract is chiefly addressed / by James Parkinson.

Date:
1802
Catalogue details

Licence: Public Domain Mark

Credit: Hints for the improvement of trusses : intended to render their use less inconvenient, and to prevent the necessity of an understrap : with the description of a truss of easy construction and slight expense, for the use of the labouring poor, to whom this little tract is chiefly addressed / by James Parkinson. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    DESCRIPTION OF THE PLATE. Fig. 1. Is the cherry-stone shooter of children, a, is a piece of string, secured to the two ends of a piece of bone, or of a bent cane, h, into which is inserted the stick c, which on being brought from underneath and placed on the upper side of the bow, returns back with velocity, on the removal of the pressure. Fig. 2. Is a similar instrument, furnished with a pad, applied to the belt, a. Fig. 3. Represents a pad, a\ the back of which is of steel, so thin at the neck, near c, as to derive therefrom a degree of elasticity, b is the elongated termination of the pad, which plays in a hinge at c; the end of which being raised ' by the action of the spring at e, is thereby made to press forcibly on the part where the protrusion takes place. Fig. 4. Shews the application of either of the fore- mentioned pieces of mechanism, to the circu- larly disposed spring of the common spring truss.