US1949737A - Propeller mounting - Google Patents

Description

March 6, 1934. I F CHA M/ v 1,949,737

PROPELLER MOUNTING Filed May 11, 1951 2 Sheets-Sheet l jvwc; FREEERICK CHQRAV'QY;

March 6, 1934. F. CHARAVAY 1,949,737

PROPELLER MOUNTING Filed May 11, 1931 .2 Sheets$heet 2 FIG. 2.

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Patented Mar. 6, 193 4 PROPELLER MOUNTING Frederick Charavay, Piqua, Ohio, assignor, of one-half to Hartzell Industries, Inc., Piqua,

Ohio, a corporation of Delaware Application May 11, 1931, Serial No; 536,411

7 Claims.

This invention relates to improvements in means for mounting and supporting a propeller, and has for its object to provide a support for an operating motor for the propeller consisting of a ring having attached thereto a frame member for supporting the motor. This frame member consists of properly shaped rods attached at each end to the ring, and supporting intermediate their ends a plate or platform on which the motor rests.

It is particularly the object of this invention to provide means for supporting the ends of the rods on the ring, consisting of welded loops attached to the ring by means of bolts. The platform or table for supporting the motor has holes therein, through which the rods extend and to which the rods are welded. The platform is such thatit may accommodate motors of different sizes by properly bolting the motor to the table after suitable holes have been formed in the table to accommodate the motor to be supported on the table;

It is an object of this invention to provide a light weight means of standard character, which can be adapted to varying sizes of motors and different sizes of rings.

It is also an object to provide a motor support in which the apertures in the motor support for attaching the motor can be formed and positioned by using the openings in the motor feet as templets for locating the holes in the motor support.

It is a further object to provide a ring adjacent the propeller tips of thin material, preferably of spun metal, of insufiicient structural strength without further support for the purpose desired, and to combine with it a motor support which braces and lends strength to the thin spun metal ring, thereby forming a light weight but very strong structure which does not require any special castings, orother special material, such as dies.

It is a further object to provide brace rods arranged in parallel relationship, supporting adjacent corners of a motor support, and bent so that the motor support is located in the bend of the rods and is supported thereby, the load being transmitted from the motor and fan supported on the support through the diverging rods to their equidistant points of attachment on the rim towhich the free ends or the rods are attached.

It is a iurther object of this invention to provide, in connection with a propeller, an air control ring adjacent one side of the propeller.

These and other advantages will appear from mounting without the motor thereon carrying 59 the propeller blades.

Figure 2 is a front elevation of the propeller mounting showing a motor and propeller blades supported on the motor table.

Figure 3 is a section on the line 3-3 of Fig- 05 ure 2.

Figure 4 is a view showing the loop formation at the upper ends of supporting rods.

Figure 5 is a view similar to Figure 4, but

taken from the right-hand side thereof.

Figure 6 is a view showing the manner in which the motor table is supported by the supporting rods.

Figure 7 is a section on the line 7-7 of Figure 2.

Figure 8 is a fragmentary sectional view showing a modified form of propeller support, in which there is a cone-shaped air passageway.

The main supporting member consists of a ring 1, which is fiat and relatively broad, having a radially inwardly directed flange 2. Arranged at suitable points around the periphery of the ring are bosses 3. In the present instance, there are four of these bosses arranged at substantially equal distance from each other, but not necessarily so. These bosses are for the purpose of supporting rods at their ends. In the present instance there are two pairs of vertically disposed rods; one pair in which the rods are indicat-ed by the numeral 4, on one vertical side I of the ring, and the other in which the rods are indicated by the numeral 7, on the other vertical side of the ring.

The rods 4 are connected at their upper ends by a cufi or loop member 5 welded to the ends of the rods to form a loop or cufi by which the rods are attached to a boss 3. The other ends of the rods4 also have a cuiT or loop 6 welded thereto by which the ends of these rods are attached to another boss 3. The rods '7 of the and 3 most-distinctly. The rods 4 are bent 1 the other, and the rods 7 are likewise bent toward the rods 4, slightly nearer one end than the other, as indicated in Figure 2. The bends of these rods are such that they are in a plane parallel to the axis of the The ring, rods and the platform on the rods brace and strengthen one another so that theseparts may be made of very light material.

. The rods at the bends support a motor table or platform 12. For supporting the table or platform 13 there is provided in each corner of the table, which is rectangular, a hole 13 in which is positioned one of the rods at its point of bending. These rods are welded to the table at this point, as indicated by the numeral 14 in Figure 6, so that the table is held in rigid position with relation to the rods and in a plane parallel to the axis of the ring. This table or platform supports a motor 15, which has the usual feet 16 attached to the table or platform by means of bolts 17. The location of the holes in the platform to receive the bolts 17 is determined by using the motor feet with holes therein as templets.

The spacing of the holes varies according to the size of the motor and the distance the feet are apart. The holes thus located are indicated by the numeral 18, as shown in Figure 1. The motor 15 has the usual motor shaft 19, on the end of which are located fan or propeller blades 20. The tips 21 of the blades extend into the angular cavity formed by the periphery of the ring and the flange 2, as clearly shown in Figure '7. In this form there is no recirculation of the air around the tips of the blades.

In Figure 8 a slightly modified form of means for supporting the propeller is shown. In this figure there is shown a cone-shaped passageway formed from sheet metal, one end of which is spun to form a return loop 23, to which the rods 4 and 7 are attached by means of bolts 11. However, the cuffs or loops are spacedfrom the part 23-by means of sleeves 24. In this form there is provided a recirculating path so that the air, having gone through the passageway from the blades, can recirculate around the periphery and across the tips of the blades and back into the air passageway 22.

There is here provided an economical, easily manufactured, durable and eflicient support for a propeller and a motor for operating the propeller.

It will be understood that I desire to comprehend within my invention such modifications as may be necessary to adapt it to varying conditions and uses.

toward the rods 7, slightly nearer one end than Having'thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a method of forming a motor support for a propeller mounting, forming a plate and providing a support for the plate, forming holes in the plate corresponding to holes in the feet of a motor to be supported by the plate, and attaching a plurality of supportingrods intermediate their ends to the plate.

2. In av method of forming a motor support plate for a propeller mounting, forming and .shaping a plate, placing a motor on the plate,

making holes in the plate corresponding to the holes in the feet of the motor, and attaching a plurality of supporting rods intermediate theirends to the plate.

3. In a method of forming a motor support for a propeller mounting, forming a plate with marginal holes therein, inserting a rod into each hole, bending the rods so they will form supports for the plate at the bends, and attaching the ends of the rods to a supporting ring.

4. In a -method of forming a motor support for a propeller mounting, forming a plate with marginal holes therein, inserting a rod into each hole, bending the rods so they will form supports for the plate at the bends, uniting by means of loops the ends of the rods in pairs, and connecting the loops to a supporting ring.

5. In a method of forming a motor support for a propeller mounting, forming a plate with marginal holes therein, inserting a rod in each a hole, bending each rod and welding it to the plate at the bend, uniting by means of loops 11 welded thereto the ends of the rods in pairs, and connecting the loops to a supporting ring.

6. In a method of forming a motor support for a propeller mounting, forming a plate with marginal holes therein, inserting a rod in each hole, bending each rod and welding it to the plate at the bend, forming loops on the ends of the rods, attaching the loops to a supporting ring, and forming other holes in the plate corresponding to the holes in the feet of a motor to be supported on the plate.

7. In a method of forming a motor support for a propeller mounting,'forming a plate with marginal holes therein, inserting a rod in each hole, bending each rod and welding it to the plate at the bend, uniting the ends of the rods in pairs by welding thereto loop members, attaching the loops to a supporting ring forming other holes in the plate corresponding to the holes in the feet of a motor to be supported on the plate.

FREDERICK CHARAVAY.

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