US2829285A

US2829285A - Toy electric hand drill

Info

Publication number: US2829285A
Application number: US691959A
Authority: US
Inventors: Robert L Steiner; Clara C Beiler
Original assignee: Kenner Products Co
Current assignee: Kenner Products Co
Priority date: 1957-10-23
Filing date: 1957-10-23
Publication date: 1958-04-01
Anticipated expiration: 1975-04-01

Description

April 1, 1958 R. L. STEINER ET AL 2,829,285

TOY ELECTRIC HAND DRILL Filed Oct. 25, 1957 f) T TOAfK/E ys.

TQY ELECTRHI HAND DRILL Robert L. Steiner, Cincinnati, tibia, and Clara C. Beiler, Fhiiadelphia, Pa assignors to The Kenner Products Company, Cincinnati, Qhio, a corporation of Delaware Application October 23, 1957, Serial No. 691359 4 Claims. (Cl. 310-50) This invention relates to childrens toys and is more particularly directed to a battery operated toy hand drill which can be used by a child to simulate various operations which can be performed with a real hand drill.

The principal object of the present invention is to provide a toy hand drill which is very realistic in appearance and operation and yet is completely safe for use by young children.

A preferred form of toy constructed in accordance with the invention comprises a plastic housing having a barrel portion enclosing a high speed, low torque motor and batteries for operating the motor. A pistol grip type handle is formed integral with the rear wall of the barrel and carries a trigger for controlling operation of the motor. The motor is mounted on the forward end of the housing barrel and includes an elongated shaft which projects forwardly of the housing and carries a chuck member. The chuck member includes a socket adapted to receive the shank end of a plurality of interchangeable accessories or tools, such as a screw driver, grinding wheel, mixer paddle, butting wheel, and the like.

By means of the present drill, a child is able to closely simulate the operations of drilling, bufling, mixing, grinding and the like which an adult can perform with a real hand drill. The battery driven motor is effective to rotate the tool at a realistically high speed and yet the tool is perfectly safe since the motor torque is so low it stalls even when a tool is pressed against the skin.

Another advantage of the present construction is that the mounting of the various components facilitates the provision of a drill having realistic proportions and at the same time including a minimum number of parts. A preferred embodiment of the present drill comprises only a housing, three spring brass strips for providing the necessary electrical connections, a motor, a chuck, a trigger and the two batteries. These component parts are economically produced and are readily assembled so that a working toy drill can be produced at a moderate cost.

In a preferred form of embodiment, the two dry cells are arranged one above another on the barrel portion of the housing directly behind the small electric motor which is clamped in the forward portion of the housing between a cup portion and a transverse wall. The batteries are reversed end for end and are in series electrical connection. Two of the brass strips are mounted in the housing adjacent to the forward ends of the batteries and provide electrical connections between the positive and negative battery electrodes and the motor.

The third spring strip is mounted in the rear portion of the housing and includes a first bowed portion in engagement with one battery terminal. The spring further includes a second bowed portion which is normally spaced slightly from the second battery terminal and is in engagement with the trigger to normally bias that member outwardly. This second bowed portion of the spring functions as a switch since in its normal position, spaced 2,829,285 Patented Apr. 1, 1958 from the battery terminal, the motor circuit is open and the drill is inoperative. However, when the trigger is depressed, this spring section is shifted into contact with the battery terminal, interconnecting the two batteries and completing the circuit to energize the motor.

Other objects and advantages of the present invention will be more readily apparent from a further consideration of the following detailed description of the drawings in which:

Figure 1 is an elevational view of a drill constructed in accordance with the present invention.

Figure 2 is an end view of the drill shown in Figure 1.

Figure 3 is a cross sectional view taken along line 3-3 of Figure 2.

Figure 4 is a cross sectional view taken along line 4-4- of Figure 3.

Figure 5 is a cross sectional view taken along line 5--5 of Figure 3.

Figure 6 is an enlarged cross sectional view taken along line 66 of Figure 1.

As best shown in Figures 1 and 3, a drill 10 constructed in accordance with the present invention comprises a housing 11 which is formed of a rigid molded plastic. Housing 11 includes a hollow barrel portion 12 and a hollow piston grip type of handle 13 formed integral with the rear portion of the barrel. The forward portion of the barrel is joined to a cup-like section or casing 14 which simulates a gear reduction unit on a commercial drill.

A high speed, low torque direct current motor 15 is mounted in the forward end of the barrel 12 and cup portion 14. This motor is powered by means of two conventional

dry cells

16 and 17, the dry cells being mounted above one another within barrel portion 12. Handle portion 13 has a slit in its front wall for receiving a trigger 18 which is movably mounted adjacent to the upper portion of the handle and projects outwardly therefrom. Motor 15 is provided with an elongated shaft 19 which projects outwardly from the forward end of the drill and carries a chuck Zil which is press fitted over the end of the shaft and is adapted to support any of a plurality of interchangeable tools.

More particularly, in a preferred embodiment, housing 11 is formed in two mating sections 26 and 27. The sections being joined together by means of any suitable adhesive. To enhance the realistic appearance of the drill, these sections have a metallic gray appearance and have suitable indentations corresponding to the motor ventilating openings of a conventional drill. Barrel portion 12 of the housing 11 encloses

dry cells

16 and 17 and motor 15. As best shown in Figure 3, the dry cells are mounted above one another and are reversed end for end. Cross arms 28 formed integral with the h using extend transversely across the forward ends of the batteries; while cross arms 3% also formed integral with the housing extend across the rear ends of the batteries. Access to the batteries is provided by means of hatch 31. This hatch, or cover, is of arcuate cross section and is held in place over an opening in the housing by means of lugs 32 which snap within the recesses 33 formed in flanges 34 as best shown in Figure 6. The inner surface of hatch 31 is provided with two spaced ribs 35, the ribs functioning to rigidify the hatch and restrain upper battery 16.

Motor 15 is a small high speed, low torque, direct cur-' rent motor having a housing 3 6 of generally circular cross section with a depending extension 37 for supporting a permanent magnet. This motor is mounted in the forward end of barrel portion 12 and cup section 14 of the h0using. The forward end of the motor housing abuts wall a sesses resilient brass strip raving clan pod between the bottom wall of the boost lug 53. Strips 45 and 5b are spring u ed way fro motor toward dry cells spring ing the negative terminal of the lower cell 17, strip an engaging the positive terminal of the upper cell.

A third resilient stri; is mounted in the rear portion of the housing and is clamped between lug 5d and arms 33 of the housing. Con ve strip includes two bowed endwise portions and 53. U1 per portion 57 presses against the r" tive term "1 of the upper cell, while the lo r portion 53 is normally spaced from the positive terminal of the lower cell as shown in Figure 3. The lowermost end of portion engages an upwardly extending finger formed on trigger i3. Spring portion 58 is thus effective to urge the trigger outwardly (clockwise in Figure 3). However, 1 is adapted to pivot about lugs 63. which r .bly formed integral with the trigger and are j urnalled in bosses 62 formed integral with handle With the trigger in its outer position, shown in Figure 3, the circuit to motor lid is broken due to the gap between terminal 53 of the lower battery and segment 5% of conductive strip 55%. However, when the trigger is depressed, finger dd forces the brass strip against terminal 63 to complete the circuit between dry cells 16 and energize motor 35.

Shaft 19 of motor carries chuck Chuck 2%) is preferably formed of a molded plastic similar to housing ii. The rear portion of the chuck is provided with a cylindrical opening adapted to be press fitted over the end of shaft 19. The tapered forward end of chuck 2b is provided with a socket Socket or recess 54 is adapted to receive and frictionally support a tool shank. The socket is also configurated to positively rotate the shank. In the preferred embodiment, socket comprises two slits disposed at right angles to one 2 that, these slits extending to a substa "ally depth. within the chuck.

Having described our invention, we claim:

1. A toy electric hand drill comprising a moulded plastic body, said body consisting of two mating sections, means adhesively a hing 5 id sections, each of said body sections being hcncw and being confi urated to form a barrel portion and a piston type ha die portion formed integral with l barrel portion, each or said body portions including an inwardly extending flange terminating in a circular recess, ele ll motor mounted within said body remote from said handle, said motor including a housing having a circular portion clamped between said inwardly projecting flanges whereby said flanges are effective to support said motor within said body, said motor having an elon" ted shaft extending forwardly of said body, a tool rec ing chuck mounted upon said shaft, two dry cells mounted above one another within said body adjacent to said handle, a trigger movably mounted adjacent to said hand e, an electrical switch in mechanical connection with say trigger and in electrical connection with said motor and said battery, and said motor being of the high speed, low torque type characterized by a torque of such low magnitude that a child can stop the motor without harm to his hand by grasping the chuck while the motor is running.

2. A toy made of molded plastic and comprising a hollow barrel portion, a hollow casing portion integral with and projecting from the forward end of said barrel portion, a hollow pistol grip type handle joined to the rear of said barrel portion, said portions simulating respectively the electric motor enclosing barrel, the gear reducing transmission casing, and the pistol grip handle of an electric hand drill, a tri r movably mounted within said i llow handle portion and projecting forwardly therefrom, means for mounting a pair of dry cell electric batteries positioned one immediately above the other within and longitudinally of the barrel portion, an electric motor, means mounting said motor within said casing portion forwardly of the position of the uppermost one of said dry cell electric batteries, an elor ted drive shaft extending from the forward end of said motor and projecting beyond the front of said casing portion, a. tool receiving chuck simulating the chuck of an electric hand drill, said tool receiving chuck engaged upon the forward end of said drive shaft, means including an electric switch operable by said trigger interconnecting said dry cell electric batteries and said motor, and said motor being of the high speed, low torque type characterized by a torque of such low magnitude that a child can stop the motor wit. out harm to his hand by grasping the chuck while the motor is running.

3. A toy made of molded plastic and comprising a hollow barrel portion, a hollow casing portion integral with and projecting from. the forward end of said barrel portion, a hollow pistol grip type handle made as an integral part of said barrel portion and projecting downwardly from the rear end thereof, said portions simulating respectively the electric motor enclosing barrel, the gear reducing transmission, and the pistol grip handle of an electric hand drill, a trigger movably mounted within said hollow handle portion and projecting forwardly therefrom immediately beneath said hollow barrel portion, at least one dry cell electric battery, means mounting said dry cell electric battery in the upper part of said hollow barrel portion with the longitudinal axis of the battery parallel to the longitudinal axis of said barrel portion, an electric motor, means mounting said electric motor within said casing portion in alignment with and in front of said battery, a drive shaft extending from the forward end of said motor and projecting beyond the front of said casing portion, a tool receiving chuck mounted upon the forward end of said drive shaft, means including an electric switch operable by said trigger interconnecting said dry cell electric battery and said electric motor, and said electric motor being of the high speed, low torque type characterized by a torque of such low magnitude that a child can stop the motor without harm to his hand by grasping the chuck while the motor is running.

4. A toy electric drill of hollow molded plastic construction comprising a barrel portion, a casing portion integral with and projecting from the forward end of said barrel portion, a piston grip ty e handle joined to the rear of said barrel portion, a trigger movably mounted within said handle portion and projecting forwardly therel'ron, means for mountin a pair of dry cell batteries ned one immediatel above the other within and ng longitudina ly of said barrel portion, an electric or, means mounting said motor wholly within said casing portion forwardly of the position of the uppermost one of said batteries, a drive shaft extending forwardly from said motor and projecting beyond the front of said casing portion, a tool receiving chuck on said drive shaft immediately forward of said casing portion, means includan electric switch operable by said trigger and electrically int nnecting sa d batteries and said motor, and said motor being of the high speed, low torque type characterized by a torque of such low magnitude that a child can stop the motor without harm to his hand by grasping the chuck while the motor is running.

(References on following page) References Cited in the file of this patent UNITED STATES PATENTS Lukowski May 4, 1937 6 Whitney et a1 Sept. 13, 1938 Avery Jan. 2, 1951 OQuinn Mar. 4, 1952 Wood Feb. 10, 1953 Green Apr. 14, 1953 Orren et a1. Feb. 16. 1954