US1392968A

US1392968A - Stretcher and drier for hides and leather

Info

Publication number: US1392968A
Application number: US429094A
Authority: US
Inventors: Francis J Robinson
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-12-08
Filing date: 1920-12-08
Publication date: 1921-10-11
Anticipated expiration: 1938-10-11

Description

E. J. ROBINSON. STRETCHER AND DRIER FOR HIDES AND LEATHER.

APPLICATION FILED DEC.811 92O.

Patehted 001:. 11

HTTY.

UNITED STATES PATENT OFFICE.

STRETCHER AND DRIER FOR HIDES AND LEATHER.

Application filed December To all whom it may concern:

Be it known that I, Framers 'J. ROBINSON, of Aurora, in the county of York,Province of Ontario, Canada, a subject of the King of Great Britain, have invented certain new and useful Improvements in Stretchers and Driers for Hides and Leather, of which the following is a specification.

This invention relates to devices used for stretching and drying hides and leather, raw or tanned. Several of these devices have been devised at different times, but so far none which will satisfactorily do the work as their construction has not been sufficiently strong to withstandthe strainof the leather being stretched or dried thereon.

My object therefore is to devise a construction for the purpose which will be sufiiciently strong to stand" up under all ordinary conditions, which will not be too expensive to construct, and which may be repaired at a minimum of expense.

I attain my object by means of the constructions hereinafter described and illustrated in the accompanying drawings in which Figure 1 is an elevation of my improved stretcher, partly in section, part of a hide being shown in position thereon;

Fig. 2 an end elevation of the same, partly in section; and

Fig. 3 a sectional detail of one of the clamp hooks. i

In the drawings like numerals of reference indicate corresponding parts in the different figures. I

1 is a frame, preferably of square or rectangular shape. This frame is provided with a plurality of longitudinal braces 2 parallel to the sides of the frame. The ends of these longitudinal braces will be provided with tenons to-fit into mortises formed in fhe ends of the frame, as indicated in dotted mes.

3 are transverse braces extending between the longitudinal braces and between the longitudinal braces and the sides. These trans-.- verse braces will also be, provided with ten oned ends to fit into mortises formed in the longitudinal braces and sides of the frame.

It will be noted that the transverse and longitudinal braces are of exactly the same thickness asthe inner edge of the frame.

Corner braces 4 are provided which are secured to the frame by bolts 5 passing through the same.

' Specification of Letters Patent.

Patented Oct. 11, 1921.

8, 1920. Serial No. 429,084.

further that there is more or less danger of dints being formed in the leather throu h the surface not being perfectly flat, I re or to use perforated sheet metal. While may use a single sheet of sufiicient size to cover the entire frame, to save material I prefer to cover each side of the frame with two large pieces 6 and to fill in the space at each end with a smaller piece 7 leaving an uncovered space at the center of the device. I show the different sections of the perforated surface, as being overlapped, but it will be understood that I may simply have their ed es abutting one another.

It wil be noted on reference to Fig. 2 that the outer ed e of the frame is of greater thickness tian the inner edge, and that the

perforated sheets

6 and 7 only ex tend to the inside of this thicker portion. I therefore secure the edges of the

pieces

6 and 7 to the frame by means of filling pieces 8, which are secured to the frame by means of nlails passing through the perforated meta It is preferable, particularly, when the' -stretching surface is formed of a plurality of pieces, to secure the same to the braces, as, for example, by nails 9, as otherwise the perforated surface would be liable to buckle. and it is one of the important features of my invention that the perforated surface should be absolutely Hat and not allowed to bend inwardly or outwardly.

Clamp hooks 10 are provided adapted to be engaged with the corners or sides of a hide or piece of leather and adapted to hook into the apertures in the perforated surface. Any suitable clamp hook may be employed, but I prefer to use a hook constructed substantially as shown in the drawings. Each clamp hook is formed with a fixedjaw 11 above which is pivoted the movable jaw 12, which movable jaw-isoperated by means of a cam lever fulcrumed on 1 lugs 14. extending up from the sides of the fixed jaw 11. The movable jaw is formed with a hooked lug 15 engageable by the cam lever to lift the movable jaw to enable the jaws to be engaged with the hide, which is subsequentl secured by pressing down the cam lever.

ring 16 is connected to the rear of the fixed jaw, which ring has a downwardly directed extension 17 adapted to act as a hook to engage in the apertures in the perforated sheets. In Fig. 3 the clamp hook is shown in full lines with the jaws open and in dotted lines with the jaws closed.

The mode of operation is to secure clamps to the corners or other projections of the hide and then to engage the hooks 17 in any suitable apertures of the metallic sheet to apply the desired stretching tension to the hide.

As a hide or piece of leather may be secured on each side of my device, there will be less danger of the same warping when in use, and as there are no pro ections of any kind on either surface, there will be no danger of dints or bulges being formed in the leather.

As the frames in actual practice will be quite large, a considerable saving will be made by omitting the covering at the center, and further, should any section of pertorated metal become damaged, it will only be necessar to replace that particular section instea of a Whole sheet. 1

From the above description it will be seen that I have devised a stretching and drying r aeaeee device which will. satisfactorily attain the objects of m invention as set out in the preamble of this specification.

What I claim as my invention i's:

1. in a leather stretcher, the combination of a rectan ular frame provided with 1ongitudinal an transverse braces, the outer edge of the frame being of greater thickness than its inner edge and the braces being of substantially the same thickness as the inner edge of the frame; perforated sheet metal at each side of the frame; and filling pieces securing the perforated sheet metal to the frame. i

2. In a leather stretcher, the combination of a rectangular frame provided with longitudinal and transverse braces, the outer edge of the frame being of greater thickness than its inner edge and the braces being of substantially the same thickness as the inner edge of the frame; perforated sheet metal at each side of the frame; filling pieces securing the perforated sheet metal to the frame; and means securing the sheet metal to the braces.

Signed at Twp. cit Vaughan, Co. of York, Prov. of Ont, this 27th day of New, 1920.

FRANCIS J. RQBINSQN.