US81787A - johnson - Google Patents

Description

No. 81,787. :PAIENTED SEPT. 1, 1868 J. F. JOHNSON. HARNESS MAKERS CLAMP.

ar/MW [1206312211 finesse. JOHNSON, or MONROVIA, INDIANA.

Letters Patent No. 81,787, dated September 1, 1868.

IMPROVEMENT IN HARNESS MAKERS CLAMP.

din some reform in in time interns tent in making pun silt: smut.

TO ALL WHOM IT MAY CONCERN Be it known that I, Jnssn E. JOHNSON, of Monrovia, in'the county of Morgan, and State of Indiana, have invented new and useful Improvements in'Harness-Makers' Clamps; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being bad to the accompanying drawing, and to the letters of reference marked thereon, making part of this specification.

"My invention relates to construction of harness-makers clamps adapted to hold reins, tugs, or other articles made of leather, having a round form while bein g sewed, and in connection therewith a channelling-tool, which is conveniently used to make the channel inthe leather for the reception of the thread.

Figure 1 is a side view, and

Figure 2 an end view of the clamp. v

Figure 3 is a detached view of a part of one of the jaws of the clamp, showing the guide for keeping the edges of the leather parallehhnd for governing the distance of the seam from the edges, and which also holds the fillin'g in thefbld of the strap. e

Figure 4 is a view of the ohanneller.

Similar letters of reference indicate the some pertain the several figures.

The following description will enable skilled artisansto make and use my invention.

The jaws AA of the clamp are made of metal, and are attached to the; stock B, as shown, the latter being fixed upright in the ordinary buck used by saddlers and harness-makers for similar purposes.

The inside of the jaws is furnished with adjustable notched guide-plates C, more clearly shown in fig. 3, which are attached to the jaws by means of screws through slots in. the guides, so arranged that they may be adjusted vertically to regulatethe distance of the seam from the edges of the leather. The notches in the two guide-plates C C are so a'rrangedthat the projections cl on one plate will shut into the notches .ol" the opposite plate- The object of constructing the guide-plates in this manner is to allow'tllo jaws'to be opened asfar as may be desired to put in the strap, or to admit of its being drawn through the jaws without separating the guides far enoughto let the filling drop down between them.

An adjustable notched guide, D, is attached to the fixed jaw A, which projects a short distance to the rear of the clamp, and serves to hold and guide the filling as it is drawn with the strap into the jaws.

The device for holding the folded strap in the jaws, and keeping it firmly down upon the guide-plate C, is

composed 'of'the horizontal bar E, with its arms, F; the horizontal bar G, with its arms, 2, by which it is attached by means of pivot-screws to the fixed jaw A, as shown in fig. 2'; the lever-H attached to the bar G, and elastic strap or spring I. Bar G, lever H, and arms e, combined, form a lever by which to actuate the holding- ,bar E. The lower ends of arms F are pivoted in the arms'e, near theirjunction with bar G, so that thebar E may bcconvenicutly swung from over the jaws,.when required, to put in the article to be sewed, as indicated by the red dottcd'lines, fig. 2, and be swing back again over the strap after it is adjusted in the jaws.

i The hinged jaw A is made to clamp the folded strap by means of tho strap-T, which is attached thereto,

and'passes over a roller, K, hung in the fixed jaw A to. the treadle of the back in the usual manner. Although notshown, [contemplate the, use of a-spring to open thejaws when the treadle is released.

, In connection with the clump, constructed and arranged as set forth, I have constructed a channelling tool, L, figs. 1 and 4, which is made of steel in the form shown, furnished'with knives, which may be adjusted and secured by thumb-screws in any position desired to regulate thedepth of the channel.

The strap to be sewed is folded at one end, and, together with the filling, is placed in the jaws with the edges restingupon the'guide-platcs C, the filling in the rear resting in the notchedguide D. The holding-bar E is then brought over the folded strap, which, by the tension off-the elastic strap I, is held securely in the jaws,

and the edges of the strap kept pressed firmly down-upon the guide-plates C. The channcller L is then sprung open and placed upon the folded strap, close to the end of the clamp opposite the operator, as shown in fig. 1, the knives resting upon the jaws of the clamp, so as to cut the channels as near the edges of the leather as practicable. The channellcr is then drawn back to the other end of the clamp, the knives cutting the channel for the thread. The operator commences sewing where the channeller started from, and sews up to it. The treadle is then released from pressure of the feet, which relaxes the clasp of the jaws upon the strap, when the latter may be drawn through the clamp until the ehanneller is brought forward to the opposite side, as in the first instance. The channeller is then drawn back, and the operator sows up to it as before, and so on for any length of strap. The holding-bar E keeps the strap in place as it is drawn through the jaws.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The guide-plates 0 attached to thejaws A. A, substantially as and fertile purpose set forth.

2. The holding-bar E, lever G H e,'and elastic strap I, arranged substantially as and fertile purpose set fort 3. The channelling-tool L, constructed and applied substantially as set forth.

JESSE F. JOHNSON.

Witnesses:

CLARK GRAVE, B. E. TANSEY'.

Images