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| Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. There are no patent drawings available. This patent is in the database for reference only.
“For a machine for Washing and Churning; Joel B. Pratt, Milo, Yates County, New York, July 14.
A box, or trough, with a semi-circular bottom, formed of slats, or ribs, running in the direction of its circumference, and a shaft made to turn, or vibrate, by a crank, with teeth, or pins, projecting from said shaft, and mashing in between the slats, constitute the main part of this machine. In this trough the clothes or the cream are to be raked, until the one is cleaned, and the other transmuted into butter. The patentee says, “what I claim is the rake, with its motion, as before specified.”
Journal of the Franklin Institute Vol. 7, Oct. 1829 pg. 257
“For a Parallel moving Perpendicular Tooth Extractor; Elijah Bryan, New York, July 13.
The construction of this instrument may be conceived by supposing it to be formed by uniting one pair of the forceps used for extracting teeth, and which always make a part of the sets of instruments for that purpose, to a part of another pair, in the following manner. Grip the jaws of one pair between those of another pair, their handles standing at right angles to each other; then suppose the handles of the first pair to be cut off just above the rivet, and the jaws of the second pair to be united to the outside of the others, by means of a joint which will operate both as a hinge and swivel; by opening or closing the handles of the forceps, the claws which are to embrace the tooth will also open and close. A part of the shank of the forceps, or of a projecting piece attached to it, is to rest upon a tooth, or teeth adjoining that to be drawn, so as to form a fulcrum upon which to bear the instrument in extracting a tooth. This bearing or fulcrum is to be covered with India rubber, leather, or some other elastic substance.
The claim is to the making of the claw, to move on pivots or swi. vels in the act of extracting a tooth, and its application to that purpose, however the same may be modified.
Numerous perpendicular extractors have been made and patented, and there are but few dentists who have not essayed, and rejected them, in consequence of the many objections to them in practice. It is not often that the adjoining teeth will bear the pressure necessary to extract one which is firmly seated; many teeth may be more readily drawn in a curved, than in a vertical direction, and a skillful operator, with a firm hand, and a strong wrist, will, in four cases out of five, be perfectly satisfied with the common instrument, or with the forceps. If a man is deficient in mechanical skill, in strength of hand, or in a knowledge of the structure of the teeth, he will, of course, make bad work in what is at the best a very rough operation; but with these prerequisites, the existing difficulties are but few. It is freely admitted that the ordinary instrument is defective, and that an improvement upon it is much to be desired, but the arrangement now proposed does not appear to us to be more likely to produce the desired end, than several previous attempts.”
Journal of the Franklin Institute Vol. 7, Oct. 1829 pgs. 256-257
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