Much trouble is experienced by housekeepers in attaching the carpets to the floor, and to obviate the difficulty attending the getting up and putting down of them without tearing the carpet or injuring the floor by tacks, this inventorHorace Thayer, No. 18 Beek-man street, New Yorkhas devised the carpet fastener that is the subject of our illustrations. Fig. 1 is a perspective view, Fig. 2 is a vertical section, and Fig. 3 an horizontal section of the device. A is the tube, with a cap at its upper end, to prevent it from sinking too deep into the floor, the top of which should be flush with the floor, and is the slide in an elevated position, bent at right angles over A, and provided with a spike, d, that passes through the carpet and into a hole, c, in the top of the cap, A. The shank of is somewhat less than the interior diameter of A, so that a spring, C, can pass between them, pressing against a projection, D, into which is screwed at I. B is flattened out at/, so that it can pass down the slot, i, in the case, A. The spring rests on two shoulders, h h. The operation is as follows:The case being let in the floor, the shanlc, B, is elevated, to allow the carpet to be passed under the spike, d, which is pulled through the carpet and into the hole, e, by the force of the spring, c, which always holds it there until lifted up by mechanical means. The top is plated, so that it is ornamental, and when once placed in a house, this fastener will remain without injuring the floor, or becoming useless, fora great length of time. It was patented April 6, 1858. Further particulars can be obtained by applying to the inventor as above.