US1272795A - Hedge-trimmer. - Google Patents

Description

F. M. GODDARD.

HEDGE TRIMMER.

APPLICATION FILED use. 5. 1916.

Patented July 16, 1918.

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HEDGE-TRIMMER.

Specification of Letters Patent.

Patented Julytfi, 1918.

Application filed December 5, 1916. Serial No. 135,103.

To all whom it may concern Be it known that I, FREDERICK M. Gon- DARD, citizen of the United States, and resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Hedge-Trimmers, of which the following is a specification.

This invention relates to hedge trimmers and its object is'to provide a circular base plate with a cutting edge and to mount in a frame on the base a motor adapted to rotate a cutting blade, the frame acting as a handle and having controlling means' for the motor which may be operated while the trimmer is held in position for work, as will be more fully described in the following specification, set forth in the appended claims and illustrated in the accompanying drawings which form a part of this application and wherein:

Figure 1 is a plan view of the lnlPIOWECl trimmer. I

Fig. 2 is a side view of the same.

Fig. 3 is a sectional view through the base and rotating blade.

Fig. 41- is an enlarged detail view of the switch.

Fig. 5 is a longitudinal sectional view through the same.

The improved hedge trimmer consists of a circular base plate 10 with suitable openings 11 to lighten its construction and around the edge of its under side is secured a fingered ring 12 constituting an annular blade. Adapted to rotate in close proximity to this ring is a disk 13 with cutting teeth and coiiperating with the ring 12 to constitute the cutting blade of the trimmer and is mounted at thei'end of the shaft 14 of a motor 15, the shaft being journaled in ball bearings 16 in a perforation at the center of the base plate;

The motor- 15 is mounted by means of bolts 17 in a frame comprising arms 18 and a ring 19, the motor being held above the surface of the base by this ring, and abundant space is left about the arms 18 so they may be grasped by the operator and the work of the trimmer directed.

At one side of the base plate 10 is a hollow arm 20 adapted to be used as handle and having a switch at its outer end by which the electric current for operating the motor may be controlled, and this switch consists of a disk 21 with a slot 22 and contact point 23 and mounted on the" arm between the insulatlng hubs 24 and 25. In the slot is a spring 26 under compression. and bearing against the stud 27 so that normally the contact points 23 and 28, the latter being in the hub 24, are diconnected; but when it is desired to supply the motor with the electric current to rotate the blade'13 the disk is thrown around by one of the fingers of the hand .holding the handle 20. The points 23 and 28, as shown in Fig. 5,-are part of an electric circuit whose wires 30 pass through the handle to the motor and may be connected to any desired source of electrical energy.

As will be seen in Fig. 3 the lower end of the armature shaft 14 is supported in the plate 10 by ordinary anti-friction cones and ball bearings and the upper cone may be ad justa-ble so that the proximity of the blades 12 and 13 can be regulated to afford proper adjustment for eflicient work.

In operating the trimmer oneof the hands grasps the handle 20 with the thumb so located that it may shift, the disk 21 by means of its extension and the, other hand catches one of the arms 18. The trimmer may then be held against the hedge and moved in the direction the trimming is to be done, operating on a vertical or a horizontal face' By the arrangement of the switch at the end of the handle the blade stops the instant of release by the operator and serious damage may be thus obviated were the cutter permitted to rotate.

It is obvious that any type of motor may be used and that the device maybe otherwise arranged and modified without departing from the essential features above described, or from the scope of the appended claims. I

What I claim as new is 1. In a hedge trimmer, the combination with a circular base having a cutting'edge, of a circular blade cooperating with the cutting edge, a motor'carried by the base and rotating the circular blade, radial handles on the base and arranged about the center of the edge and blade and supporting the motor, and a controller for the motor on a handle and adapted to be operated as the trimmer is held in its working position.

2. In a hedge trimmer, the combination with a base plate having a cutting edge, of a coiiperating rotating blade, a spider radiating from a center common to that of the handles on the upper side of the plate, a

blades, a motor carried by the 'spider, a

shaft for the motor and carrying the rotating blade, anti-friction cones supporting the shaft and adapted to regulate the proximity of the blade and the cutting edge, and a controller for the motor carried by a handle.

3. In a hedge trimmer, the combination with a circular base plate having an opening at its center, of a cutting edge on the plate,

motor above the opening in the base plate and supported by the handles, a switch for the motor in a circuit therefor and on one of the handles, a shaft for the motor and passing through the opening, and a circular blade .at the end of the shaft and cooperatin withv the cuttin edge.

igned at New Y or]; city in the county of New York and State of New York this 24th day of November A. D. 1916.

FREDERICK M. GODDARD.

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